For medical professionals caring for patients undergoing mechanical ventilation due to respiratory failure, the ability to quickly and safely obtain images of pulmonary function at the patient’s bedside would be highly desirable. Such images could be used to provide early warnings of developing pulmonary pathologies in real time, thereby reducing the incidence of complications and improving patient outcomes. Electrical impedance tomography (EIT) and low-frequency ultrasound computed tomography (USCT) are two imaging techniques with the potential to provide real-time non-ionizing pulmonary monitoring in the ICU setting, and each method has its own unique advantages as well as drawbacks. In this work, we describe a new algorithm for a system in which the strengths of the two modalities are combined in a complementary fashion. Specifically, preliminary reconstructions from each modality are used as priors to stabilize subsequent reconstructions, providing improved spatial resolution, sharper organ boundaries, and enhanced appearance of pathologies and other features. Results are validated using three numerically simulated thoracic phantoms representing pulmonary pathologies.We present the thickness-dependent permeance of highly cross-linked polyamide (PA) membranes formed by a molecular layer-by-layer (mLbL) deposition process. The deposition allows for the synthesis of extremely smooth, uniform PA films of tunable thickness, which is counter to the less controlled interfacial polymerization process used commercially. The ability to control and measure the membrane thickness allows us to elucidate the relationships among network structure, transport properties, and separation performance. In this work, a series of large-area mLbL PA membranes is prepared with thickness ranging from less than 5 nm to greater than 100 nm, which can be transferred defect-free via a film floating technique onto a macroporous support layer and challenged with salt solutions. A critical thickness of 15 nm is identified for efficient desalination, and water permeance is described using a multi-layer solution diffusion model that allows for the extraction of material properties relevant to transport. Finally, the model demonstrates the existence of two distinct layers in the mLbL films, one layer comprised of a (5 to 10) nm graded or less cross-linked layer at the surface and a more densely cross-linked layer in the interior of the film. This graded layer appears inherent to the mLbL deposition process and is observed at all film thicknesses.As the financial challenges facing the U.S higher education industry mount, colleges and universities seek new activities that can improve their financial situation. Online education programs are often viewed as a promising option due to growing student interest and the substantial net revenue generated by early entrants that leveraged economies of scale and scope. The number of schools that can experience similar outcomes will depend upon whether the online market is primarily concentrated, with a small number of higher education institutions enrolling most students, rather than fragmented, with large numbers of institutions enrolling meaningful amounts of online students. We examine this topic by providing the first detailed study of market concentration in online education. We first introduce a theory from economics, Sutton’s model of endogenous fixed costs, to the higher education literature to highlight key dynamics that shape concentration levels. Using institution-level enrollment data for the population of Title IV postsecondary institutions, we then empirically examine concentration levels in online education. We find that relative to in-person education, national online enrollment patterns are heavily concentrated. The online market has a distinctive structure, consisting of a small number of large national providers and a large number of small local providers. Online enrollment patterns became less concentrated between Fall 2012 and Fall 2018 due to major enrollment declines of large for-profit providers. Concentration levels, however, plateaued by the end of the period due to rapid enrollment growth at large national nonprofit providers.Beds are a prevalent combustible in fatal fires in the United States effective 1 July 2007, the US Consumer Product Safety Commission promulgated a standard to severely reduce the heat release rate and the early heat output from mattresses and foundations when ignited by a flaming ignition source. This study estimates the Standard’s success over its first decade using fire incidence, US population, and mattress sales data. Angiogenesis inhibitor The technique mitigates the influence of some exogenous factors that might have changed during this decade. The Standard is accomplishing its purpose, preventing approximately 65 fatalities (out of an estimated 95 fatalities in 2002-2005) from bed fires annually during 2015-2016, although not all pre-Standard mattresses had yet been replaced. Compared to residential upholstered furniture fires, which were not affected by the Standard, the numbers of bed fires decreased by 12%, injuries by 34%, and deaths by 82% between 2005-2006 and 2015-2016. Per bed fire, injuries decreased by 25% and fatalities decreased by 67%, indicating that the severity of bed fires is being reduced.1. Population responses to extrinsic mortality can yield no change in number of survivors (compensation) or an increase in number of survivors (overcompensation) when the population is regulated by negative density-dependence. This intriguing response has been the subject of theoretical studies, but few experiments have explored how the source of extrinsic mortality affects the response. 2. This study tests abilities of three functionally diverse predators, alone and combined, to induce (over)compensation of a prey population. Larval Aedes aegypti (Diptera Culicidae) were exposed to predation by Mesocyclops longisetus (Crustacea Copepoda), Anopheles barberi (Diptera Culicidae), Corethrella appendiculata (Diptera Corethrellidae), all three in a substitutive design, or no predation. 3. The number of survivors to adulthood, female size and development time, and a composite index of performance (r’) were analysed. Predator treatment did not have a significant effect on total number of survivors, nor on number of males, suggesting mortality by predation was compensatory.