Airborne Remote Observations of L-Band Radio Frequency Interference and Implications for Satellite Missions

Passive remote sensing of the Earth s surface and atmosphere from space has significant importance in operational and research environmental studies, in particular for the scientific understanding, monitoring and prediction of climate change and its impacts. Passive remote sensing requires the measurement of naturally occurring radiations, usually of very low power levels, which contain essential information on the physical process under investigation. As such, these sensed radio frequency bands are a unique natural resource enabling space borne passive sensing of the atmosphere and the Earth s surface that deserves adequate allocation to the Earth Exploration Satellite Service and absolute protection from interference. Unfortunately, radio frequency interference (RFI) is an increasing problem for Earth remote sensing, particularly for passive observations of natural emissions. Because these natural signals tend to be very weak, even low levels of interference received by a passive sensor may degrade the fidelity of scientific data. The characteristics of RFI (low-level interference and radar-pulse noise) are not well known because there has been no systematic surveillance, spectrum inventory or mapping of RFI. While conducting a flight experiment over central Tennessee in May 2010, RFI, a concern for any instrument operating in the passive L band frequency, was observed across 16 subbands between 1402-1427 MHz. Such a survey provides rare characterization data from which to further develop mitigation technologies as well as to identify bandwidths to avoid in future sensor formulation

Coordinated field study for CaPE: Analysis of energy and water budgets

The objectives of this hydrologic cycle study are to understand and model (1) surface energy and land-atmosphere water transfer processes, and (2) interactions between convective storms and surface energy fluxes. A surface energy budget measurement campaign was carried out by an interdisciplinary science team during the period July 8 - August 19, 1991 as part of the Convection and Precipitation/Electrification Experiment (CaPE) in the vicinity of Cape Canaveral, FL. Among the research themes associated with CaPE is the remote estimation of rainfall. Thus, in addition to surface radiation and energy budget measurements, surface mesonet, special radiosonde, precipitation, high-resolution satellite (SPOT) data, geosynchronous (GOES) and polar orbiting (DMSP SSM/I, OLS; NOAA AVHRR) satellite data, and high altitude airplane data (AMPR, MAMS, HIS) were collected. Initial quality control of the seven surface flux station data sets has begun. Ancillary data sets are being collected and assembled for analysis. Browsing of GOES and radar data has begun to classify days as disturbed/undisturbed to identify the larger scale forcing of the pre-convective environment, convection storms and precipitation. The science analysis plan has been finalized and tasks assigned to various investigators

Successful tactile based visual sensory substitution use functions independently of visual pathway integrity

Purpose: Neuronal reorganization after blindness is of critical interest because it has implications for the rational prescription of artificial vision devices. The purpose of this study was to distinguish the microstructural differences between perinatally blind (PB), acquired blind (AB), and normally sighted controls (SCs) and relate these differences to performance on functional tasks using a sensory substitution device (BrainPort). Methods: We enrolled 52 subjects (PB n = 11; AB n = 35; SC n = 6). All subjects spent 15 h undergoing BrainPort device training. Outcomes of light perception, motion, direction, temporal resolution, grating, and acuity were tested at baseline and after training. Twenty-six of the subjects were scanned with a three Tesla MRI scanner for diffusion tensor imaging (DTI), and with a positron emission tomography (PET) scanner for mapping regional brain glucose consumption during sensory substitution function. Non-parametric models were used to analyze fractional anisotropy (FA; a DTI measure of microstructural integrity) of the brain via region-of-interest (ROI) analysis and tract-based spatial statistics (TBSS). Results: At baseline, all subjects performed all tasks at chance level. After training, light perception, time resolution, location and grating acuity tasks improved significantly for all subject groups. ROI and TBSS analyses of FA maps show areas of statistically significant differences (p ≤ 0.025) in the bilateral optic radiations and some visual association connections between all three groups. No relationship was found between FA and functional performance with the BrainPort. Discussion: All subjects showed performance improvements using the BrainPort irrespective of nature and duration of blindness. Definite brain areas with significant microstructural integrity changes exist among PB, AB, and NC, and these variations are most pronounced in the visual pathways. However, the use of sensory substitution devices is feasible irrespective of microstructural integrity of the primary visual pathways between the eye and the brain. Therefore, tongue based devices devices may be usable for a broad array of non-sighted patients. © 2014 Lee, Nau, Laymon, Chan, Rosario and Fisher

Natural background radiation in the proposed Illinois SSC siting area

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Quantifying metabolic heterogeneity in head and neck tumors in real time: 2-DG uptake is highest in hypoxic tumor regions

Purpose: Intratumoral metabolic heterogeneity may increase the likelihood of treatment failure due to the presence of a subset of resistant tumor cells. Using a head and neck squamous cell carcinoma (HNSCC) xenograft model and a real-time fluorescence imaging approach, we tested the hypothesis that tumors are metabolically heterogeneous, and that tumor hypoxia alters patterns of glucose uptake within the tumor. Experimental Design: Cal33 cells were grown as xenograft tumors (n = 16) in nude mice after identification of this cell line's metabolic response to hypoxia. Tumor uptake of fluorescent markers identifying hypoxia, glucose import, or vascularity was imaged simultaneously using fluorescent molecular tomography. The variability of intratumoral 2-deoxyglucose (IR800-2-DG) concentration was used to assess tumor metabolic heterogeneity, which was further investigated using immunohistochemistry for expression of key metabolic enzymes. HNSCC tumors in patients were assessed for intratumoral variability of 18F-fluorodeoxyglucose (18F-FDG) uptake in clinical PET scans. Results: IR800-2-DG uptake in hypoxic regions of Cal33 tumors was 2.04 times higher compared to the whole tumor (p = 0.0001). IR800-2-DG uptake in tumors containing hypoxic regions was more heterogeneous as compared to tumors lacking a hypoxic signal. Immunohistochemistry staining for HIF-1α, carbonic anhydrase 9, and ATP synthase subunit 5β confirmed xenograft metabolic heterogeneity. We detected heterogeneous 18F-FDG uptake within patient HNSCC tumors, and the degree of heterogeneity varied amongst tumors. Conclusion: Hypoxia is associated with increased intratumoral metabolic heterogeneity. 18F-FDG PET scans may be used to stratify patients according to the metabolic heterogeneity within their tumors, which could be an indicator of prognosis. © 2014 Nakajima et al

A Rhythm, Ritual and Rule for a Wisdom Monastic Community for Second Half of Life Pilgrims

This dissertation explores the establishing of a wisdom monastic community to nurture disciples living into the Second Half of Life. A critical problem facing mainline churches today is the increasing number of US-American adults describing themselves as “spiritual, but not religious.” In 2012, a survey by the Pew Research Center’s Forum on Religion and Public Life documented that 20 percent of the adults in the United States classify themselves as religiously unaffiliated. Adding to this population are longtime, faithful lay leaders announcing they are “done” with church. Recent research suggests that a growing number of these adults leave congregations that have nurtured their faith through the First Half of Life because churches are ill equipped to offer spiritual nurture for the Second Half of Life. In this dissertation, the researcher explores whether a local spiritual community can effectively nurture the continuing spiritual growth of people living in the Second Half of the Life by establishing a wisdom monastic community. Section One addresses the problems both churches and believers are facing through an exploration of the spiritual needs of those moving in the Second Half of Life. Section Two identifies and evaluates alternative solutions to the ministry problem of continued spiritual nurture for Second Half of Life pilgrims. Section Three introduces A Rhythm, Ritual and Rule for a Wisdom Monasticism tailored for pilgrims in the Second Half of Life. Section Four posits an artifact description of the Rhythm, Ritual and Rule of a Wisdom Monastic Community, including the survey summary, questions conducted to find Second Half of Life Pilgrims and transcripts of interviews with Second Half of Life Pilgrims. Section Five offers the artifact specification. The Final Section offers a x postscript, providing suggestions for further research. The artifact concludes the dissertation

Experiences of Special Education Teachers Performing Physical Restraints Involving Students with Disabilities: A Transcendental Phenomenological Study

The performance of physical restraints on students with disabilities has become a significant interest to the legislative and disability communities in recent years. A report from the USDOE Department of Civil Rights (2018) indicated that while students with disabilities make up only 12% of the student population, these students account for 71% of the physical restraints in public schools. To date, little research has been identified involving physical restraints in public schools. This transcendental phenomenological study collected data from 10 special educators in a school district in Southeast Tennessee who were involved in the physical restraint of students with disabilities using a demographics questionnaire, individual open-ended interviews, a focus group, and debriefing interviews. Data analysis included the horizonalization (Moustakas, 1994) of all transcripts derived from data collection methods to explore textural and structural descriptions and to fuse the essence of the phenomenon to answer the following central research question: What are the experiences of special education teachers involved in the physical restraint of students with disabilities? Data analysis occurred using Atlas.ti software and three themes emerged: (a) keep everyone safe, (b) build your toolbox, and (c) it is what it is. The presentation of the findings included their relation to self-determination theory and self-efficacy theory

Implications of Collaboration in Education

There are many examples of collaboration in education. Superintendents must collaborate with department heads, principals, teacher associations, and state agencies. Principals must collaborate with teachers, parents, student organizations, and local agencies. Teacher educators must collaborate within the University as well as with local education agencies and pre-service teachers. Special educators must collaborate with parents, agencies, regular education teachers, school psychologists, etc. While these examples in no way encompass the myriad forms of collaboration necessary in education, they bring clarity to the fact that no level of education is immune to collaboration