Airborne radar simulation studies of the Denver July 11, 1988 microburst

In the simulation program, a wind shear detection Doppler radar was placed in UAL 395 and 236 aircraft and flown along their landing flight paths. The microburst was placed at the appropriate location and intensity corresponding to each aircraft's landing approach time. A baseline set of radar design parameters were used in the simulation. Output display information and wind shear detection processing was produced as the aircraft approached the microburst. Information on the results of the simulation study are given in graphical form

Review: Chapter Six ‘Activities for any day of the term’ in ‘The New College Classroom’ by Christina Katopodis and Cathy Davidson.

Review of chapter 6 of 'The New College Classroom.' Cathy N. Davidson & Christina Katopodis, The New College Classroom. Harvard University Press, 2022. Pp. ix, 303. ISBN 9780674249954

Airborne Doppler radar detection of low altitude windshear

As part of an integrated windshear program, the Federal Aviation Administration, jointly with NASA, is sponsoring a research effort to develop airborne sensor technology for the detection of low altitude windshear during aircraft take-off and landing. One sensor being considered is microwave Doppler radar operating at X-band or above. Using a Microburst/Clutter/Radar simulation program, a preliminary feasibility study was conducted to assess the performance of Doppler radars for this application. Preliminary results from this study are presented. Analysis show, that using bin-to-bin Automatic Gain Control (AGC), clutter filtering, limited detection range, and suitable antenna tilt management, windshear from a wet microburst can be accurately detected 10 to 65 seconds (.75 to 5 km) in front of the aircraft. Although a performance improvement can be obtained at higher frequency, the baseline X-band system that was simulated detected the presence of a windshear hazard for the dry microburst. Although this study indicates the feasibility of using an airborne Doppler radar to detect low altitude microburst windshear, further detailed studies, including future flight experiments, will be required to completely characterize the capabilities and limitations

Characterization of Skin-Resident Microbiota in Inflammatory Cutaneous Disease

The skin is the largest organ in the human body, approximately 1.5 to 2 m2 in area, and serves as a crucial physical and immune barrier from our environment. Yet, the skin is home to billions of microorganisms inhabiting a multitude of folds, invaginations, and specialized niches that sustain microscopic life (Grice and Segre, 2011; Scharschmidt and Fischbach, 2013). We are not teeming with bugs so much as we are irrevocably intertwined with microbiota such that, throughout evolutionary history, these bacteria, fungi, and viruses have become invaluable parts of our physiology, cooperatively acting as a hidden organ. The microbiota colonizing the skin, their genetic material, and their microenvironments are collectively referred to as the skin microbiome (Marchesi and Ravel, 2015). Most microorganisms are not pathogens. Rather, the majority of microorganisms living on their hosts are benign and, in some cases, beneficial, performing functions vital for host physiology and homeostasis. Scientists are beginning to unravel how the skin microbiome is interfacing with different physiological processes of the mammalian host. Microbiota living on us, but also residing within deeper layers of the skin, contribute to host inflammation, epidermal barrier function, and immunity through feedback mechanisms with our immune cells (Grice and Segre, 2011). Microbiota even contribute to host defense through the production of bactericidal factors (Iacob et al., 2018; Jacobs et al., 2017; Nakatsuji et al., 2017; Zheng et al., 2020). Microbiome researchers are interested in understanding these mechanisms that link commensal microbes with host biology and how these interactions contribute to host health or disease. This thesis aims to characterize resident skin microbiota communities the context of inflammatory cutaneous disease

Are You Speaking? : A Speech Act Analysis of Pinter\u27s \u3ci\u3eA Kind of Alaska\u3c/i\u3e and \u3ci\u3eNo Man\u27s Land\u3c/i\u3e

My purpose, however, lies not only in a desire to contribute insight to the critical canon on Pinter. I also wish to offer some insight into the literary application of speech act theory. Among the writers I will discuss are Austin, Searle, Altieri, Pratt, Derrida, and Fish. This application leads to my belief that drama is the literary genre to which speech act theory is most appropriate and applicable (in much the same way as the poem serves as the New Critical model). I will begin with a brief introduction to speech act theory, move on to my analysis of the plays, make general inferences about the plays and the theory, and then reach for conclusions

Source of the optical red-slope in iron-rich meteorites

The relationship between ordinary chondrites and S-type asteroids is an unresolved issue in meteorite science. S-type asteroids exhibit a positively red-sloped spectrum that is interpreted to indicate the presence of elemental iron on the surfaces. The characteristic red-sloped spectrum of iron-rich meteorites is produced by only the specular component of the reflectance. Complex metallic surfaces can be modeled as linear mixtures of specular and nonspecular components. It is the geometry of the metal on a surface and its interaction with surrounding material, rather than the absolute amount of metal, that determine the redness of resulting spectra. In order to distinguish between ordinary chondrite and differentiated parent bodies it is important to understand how regolith processes affect the nature and form of metal on asteroid surfaces

CRISPR/Cas9 editing of endogenous banana streak virus in the B genome of Musa spp. overcomes a major challenge in banana breeding

Open Access Journal; Published online: 31 Jan 2019Presence of the integrated endogenous banana streak virus (eBSV) in the B genome of plantain (AAB) is a major challenge for breeding and dissemination of hybrids. As the eBSV activates into infectious viral particles under stress, the progenitor Musa balbisiana and its derivants, having at least one B genome, cannot be used as parents for crop improvement. Here, we report a strategy to inactivate the eBSV by editing the virus sequences. The regenerated genome-edited events of Gonja Manjaya showed mutations in the targeted sites with the potential to prevent proper transcription or/and translational into functional viral proteins. Seventy-five percent of the edited events remained asymptomatic in comparison to the non-edited control plants under water stress conditions, confirming inactivation of eBSV into infectious viral particles. This study paves the way for the improvement of B genome germplasm and its use in breeding programs to produce hybrids that can be globally disseminated