Detection of Circulating Biomarkers with Gold-Based Nanoparticles and Optical Spectroscopy

Detection of Circulating Biomarkers with Gold-Based Nanoparticles and Optical Spectroscop

More than Mechanisms: Shifting Ideologies for Asset-Based Learning in Engineering Education

Learning spaces, the practices in which people engage, and the representations they use are ideological. Ideologies are coherent constellations of values, beliefs, and practices that impose order on how disciplines like engineering operate. Historically, engineering spaces have been dominated by a relatively technocratic, rationalistic, and exclusionary ideology, but more recent attention to asset-based approaches to engineering education offers transformative promise. Asset-based ideologies can reshape images of legitimized engineering practice, recasting engineering education to disrupt dominant exclusionary ideologies. This paper describes an assets-based learning space, SETC, that recaptures the imagination of engineering for technological and social change. Drawing from extensive ethnographic observational data, interviews, and artifacts produced in SETC, we describe aspects of this learning space, including the use of representations and practices that specifically support expansive forms of engineering practiced by youth of color. We also explore how SETC’s commitment to antiracist and liberatory practices, including shifting relationships to technology and engineering design in service of enhancing life, manifests in its transformative mission to design programs and activities for youth that disrupt dominant ideologies. SETC centers making and tinkering as legitimate expressions of engineering, and we present a case of a youth participant to illustrate the rich engineering learning that the space makes possible. The case features Naeem engineering a gear-based project that expresses his interpretation of Black Lives Matter. Situated in his long history in the learning space, we explore how youth’s interactions with conventionalized representations—which serve to maintain dominant ideologies—are enhanced by asset-based commitments. This paper contributes specific recommendations for designing spaces for new ideologies, making engineering education more equitable for youth of color while also expanding notions of what engineering is and the forms that it can take

Do Jet-Driven Shocks ionize the Narrow Line Regions of Seyfert Galaxies?

We consider a model in which the narrow line regions (NLRs) of Seyfert galaxies are photoionized ``in situ'' by fast (300 -- 1,000 km/s), radiative shock waves driven into the interstellar medium of the galaxy by radio jets from the active nucleus. Such shocks are powerful sources of soft X-rays. We compute the expected ratio of the count rates in the ROSAT PSPC and Einstein IPC detectors to the [OIII] \lambda 5007 flux as a function of shock velocity, and compare these ratios with observations of type 2 Seyferts. If most of the observed soft X-ray emission from these galaxies originates in the NLR and the absorbing hydrogen column is similar to that inferred from the reddening of the NLR, a photoionizing shock model with shock velocity $\simeq$ 400 -- 500 km/s is compatible with the observed ratios. High angular resolution observations with AXAF are needed to isolate the X-ray emission of the NLR and measure its absorbing column, thus providing a more conclusive test. We also calculate the expected coronal iron line emission from the shocks. For most Seyfert 2s, the [Fe X] \lambda 6374/H \beta$ ratio is a factor of 2 -- 14 lower than the predictions of 300 -- 500 km/s shock models, suggesting that less hot gas is present than required by these models.Comment: Astrophys J. Letters 1999 March 10 issue, Vol. 51

A REPEATED MEASURES ANALYSIS OF THE EFFECT OF VEGETATIVE BUFFERS ON CONTAMINANT RUNOFF FROM BERMUDAGRASS TURF

A repeated measures analysis was conducted on a set of data from a multi-year study to assess the effect of vegetative buffers on the surface runoff of selected herbicides and nutrients. Multiplicative models describing the observed behavior of runoff concentration over time for buffered and non-buffered plots were fitted on a log-transformed scale using linear mixed models with PROC MIXED in PC SAS version 6.11. A spatial power covariance structure was used. Additional models for contaminant mass flow rates were fitted to evaluate the effect of buffers on total runoff mass

The Grizzly, November 3, 1978

Task Force Proposes Curricular Revisions: Faculty Discusses Broad Academic Changes • Computer Programs To Be Studied • Reed This Message • Liberal Education for a Modern World • Letters to the Editor • Campus Committees Graded • Springsteen Revisited • Halloween Horrors! • Annual Messiah Rehearsal • French Club Wined and Dined • GM: Looking Good For \u2779 • Soccer Trounces Widener • Founders\u27 Convocation • Harriers Cap 12-1 Season • Mermaids Anticipate Slick Season • Hockey J. V.s With No Losses • Zetans Take Intramural Football Championship • News in Brief: Egdon Heath to Rock T. G.; Forum Presents Workshop, Performance; Ursinus Appoints Band Directorhttps://digitalcommons.ursinus.edu/grizzlynews/1005/thumbnail.jp

Research-based versus clinical serum creatinine measurements and the association of acute kidney injury with subsequent kidney function: findings from the Chronic Renal Insufficiency Cohort study.

Background:Observational studies relying on clinically obtained data have shown that acute kidney injury (AKI) is linked to accelerated chronic kidney disease (CKD) progression. However, prior reports lacked uniform collection of important confounders such as proteinuria and pre-AKI kidney function trajectory, and may be susceptible to ascertainment bias, as patients may be more likely to undergo kidney function testing after AKI. Methods:We studied 444 adults with CKD who participated in the prospective Chronic Renal Insufficiency Cohort (CRIC) Study and were concurrent members of a large integrated healthcare delivery system. We estimated glomerular filtration rate (eGFR) trajectories using serum creatinine measurements from (i) the CRIC research protocol (yearly) and (ii) routine clinical care. We used linear mixed effects models to evaluate the associations of AKI with acute absolute change in eGFR and post-AKI eGFR slope, and explored whether these varied by source of creatinine results. Models were adjusted for demographic characteristics, diabetes status and albuminuria. Results:During median follow-up of 8.5 years, mean rate of eGFR loss was -0.31 mL/min/1.73 m2/year overall, and 73 individuals experienced AKI (55% Stage 1). A significant interaction existed between AKI and source of serum creatinine for acute absolute change in eGFR level after discharge; in contrast, AKI was independently associated with a faster rate of eGFR decline (mean additional loss of -0.67 mL/min/1.73 m2/year), which was not impacted by source of serum creatinine. Conclusions:AKI is independently associated with subsequent steeper eGFR decline regardless of the serum creatinine source used, but the strength of association is smaller than observed in prior studies after taking into account key confounders such as pre-AKI eGFR slope and albuminuria

Observations of Particulates within the North Atlantic Flight Corridor: POLINAT 2, September-October 1997

This paper discusses particulate concentration and size distribution data gathered using the University of Missouri-Rolla Mobile Aerosol Sampling System (UMR-MASS), and used to investigate the southern extent of the eastern end of the North Atlantic Flight Corridor (NAFC) during project Pollution From Aircraft Emissions in the North Atlantic Flight Corridor/Subsonic Assessment (SASS) Ozone and Nitrogen Oxide Experiment (POLINAT 2/SONEX) from September 19 to October 23, 1997. The analysis presented in this paper focuses on the corridor effect, or enhancement of pollutants by jet aircraft combustion events. To investigate the phenomena, both vertical and horizontal profiles of the corridor, and regions immediately adjacent to the corridor, were performed. The profiles showed a time-dependent enhancement of particulates within the corridor, and a nonvolatile (with respect to thermal volatilization at 300° C) aerosol enhancement at corridor altitudes by a factor of 3.6. The southern extent of the North Atlantic Flight Corridor was established from a four flight average of the particulate data and yielded a boundary near 42.5° N during the study period. A size distribution analysis of the nonvolatile particulates revealed an enhancement in the \u3c40 nm particulates for size distributions recorded within the flight corridor

The Observations Of The X-Ray Source Hz Herculis-Hercules X-1

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More than mechanisms: shifting ideologies for asset-based learning in engineering education

Learning spaces, the practices in which people engage, and the representations they use are ideological. Ideologies are coherent constellations of values, beliefs, and practices that impose order on how disciplines like engineering operate. Historically, engineering spaces have been dominated by a relatively technocratic, rationalistic, and exclusionary ideology, but more recent attention to asset-based approaches to engineering education offers transformative promise. Asset-based ideologies can reshape images of legitimized engineering practice, recasting engineering education to disrupt dominant exclusionary ideologies. This paper describes an assets-based learning space, SETC, that recaptures the imagination of engineering for technological and social change. Drawing from extensive ethnographic observational data, interviews, and artifacts produced in SETC, we describe aspects of this learning space, including the use of representations and practices that specifically support expansive forms of engineering practiced by youth of color. We also explore how SETC’s commitment to antiracist and liberatory practices, including shifting relationships to technology and engineering design in service of enhancing life, manifests in its transformative mission to design programs and activities for youth that disrupt dominant ideologies. SETC centers making and tinkering as legitimate expressions of engineering, and we present a case of a youth participant to illustrate the rich engineering learning that the space makes possible. The case features Naeem engineering a gear-based project that expresses his interpretation of Black Lives Matter. Situated in his long history in the learning space, we explore how youth’s interactions with conventionalized representations—which serve to maintain dominant ideologies—are enhanced by asset-based commitments. This paper contributes specific recommendations for designing spaces for new ideologies, making engineering education more equitable for youth of color while also expanding notions of what engineering is and the forms that it can take.Published versio