Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"CCN"”.
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Impact of Saharan Dust as CCN on the Evolution of an Idealized Tropical Cyclone
The direct and indirect effect of CCN on TC development and the nonlinear nature of the interaction between nucleating aerosols and TC dynamics are inseparable, which makes the ultimate impact of the ambient aerosol concentration on the TC intensity difficult to predict.
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An investigation into the effects of CCN on the timing of convective cold pool initiation
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Idealized particle-resolved large-eddy simulations to evaluate the impact of emissions spatial heterogeneity on CCN activity
… hygroscopicity and cloud condensation nuclei (CCN) activity. This thesis investigates the impact of emissions spatial heterogeneity on CCN activity by using the particle-resolved model PartMC coupled to the Weather Research and Forecasting model configured for large-eddy simulations (LES). The …
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Cloud condensation nuclei in western Colorado: observations and model predictions
… aerosols, or cloud condensation nuclei (CCN), have been shown to impact cloud droplet number concentration and subsequently cloud and precipitation processes. This issue carries special significance in western Colorado where a significant portion of the region’s water resources is …
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Effects of Cereal Cyst Nematode Infection on Resistant and Susceptible Barley
Cereal cyst nematodes (CCN) are obligate biotrophs that affect the yield of cereals including barley. This parasite is one of the biotic factors that affect plant-water relations and imposes early stress that reduces yield irrespective of the availability of water and nutrient. Invasion, migration, …
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Structure and microwave spectrum of the 2-cyano-2-propyl radical
… Thirty-three transitions were assigned for (CH₃)₂CCN and twenty-one for (CD₃)₂CCN. The rigid rotor rotational constants determined by calculation of the hypothetical unsplit rotational transitions are A=8276.7, B=3919.7, C=2751.5Mhz for (CH₃)₂CCN and A=6241.3, B=3490.7, C=2372.6Mhz for (CD₃)₂CCN. …
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An ensemble modeling approach to examining the impact of the Saharan air layer on the evolution of an idealized tropical cyclone
… of TC intensity on cloud condensation nuclei (CCN) concentration exists in the context of uncertainties induced by perturbations in other parameters describing the meteorological conditions and properties of the initial vortex. First, RAMSv6.0 was used to show that minor differences in …
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Hygroscopic growth and cloud condensation nuclei activity of fresh and chemically-aged biomass-pyrolyzed organic aerosol
… organic aerosols and cloud condensation nuclei (CCN) in the atmosphere. Aerosol-cloud interactions contribute to uncertainties in estimates of climate forcing, not only because of the complexities in their initial size and chemical composition, but also because of transformations (aging) they …
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A scoping review of primary caregivers'perceptions of their involvement in augmentative and alternative communication of their children
… of children with complex communication needs (CCN). Various studies focused on the experiences and perceptions of parents as primary caregivers with regards to their involvement in AAC intervention and implementation of their child with CCN. The value of the findings of these studies lies …
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Feasibility of individualised synthetic speech for children with complex communication needs in three South African languages (South African English, Afrikaans, and isiXhosa)
… for children with complex communication needs (CCN), sometimes the only functional way to communicate is by using an augmentative and alternative communication (AAC) device, specifically speech-generating devices. However, AAC users often lack a personal connection to the synthetic voices found …
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Modeling study of the hygroscopic, optical, and cloud-activation properties of aerosols from biofuel combustion
… state, hygroscopicity, optical properties, CCN activity, and total quantity of aerosols emitted from biofuel combustion. The change in cloud characteristics due to biofuel burning aerosols is uncertain, in part, due to the uncertainty in the added number of cloud condensation nuclei (CCN) …
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Atmospheric organic aerosol - water interactions
… affect by serving as cloud condensation nuclei (CCN). While the chemistry and physical properties of the inorganic components of the aerosols are more or less known, the same does not stand for the organic components. Hygroscopic water soluble organic material can enhance the water absorption of …
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Investigating the effects of integrated systematic decoding, spelling and communication instruction for students with complex communication needs
… for students with complex communication needs (CCN). The current study was done with three students with CCN, all of whom used a particular augmentative communication device. Using a non-concurrent multiple baseline across subject design, and a descriptive case study design, the study tested the …
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Availability, Integrity, and Confidentiality for Content Centric Network internet architectures
… of the present''. Content Centric Networking (CCN) is one of the candidates for a future internet architecture. Security is one of the most significant considerations while designing a future internet architecture. Availability, Integrity, and Confidentiality (AIC) are considered the three most …
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Rain Formation in Shallow Tropical Convection
… efficient, provided that giant and ultragiant CCN are present near cloud base. While more complex processes leading to drop spectra broadening, such as mixing, and stochastic condensation most likely also occur in nature, they appear to be unnecessary to explain the rapid formation of rain in …
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Investigation of the evolution of atmospheric particles with integration of the stochastic particle-resolved model PartMC-MOSAIC and atmospheric measurements
… mixing state and cloud condensation nuclei (CCN) activation properties in a ship plume. Comparisons of our results with observations from the QUANTIFY Study in 2007 in the English channel and the Gulf of Biscay showed that the model was able to reproduce the observed evolution of total number …
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A model for the long-life fatigue behavior of small notches
… was studied. A crack-closure-at-a-notch (termed CCN) model for predicting the fatigue life and fatigue threshold stress was developed based on the assumption that the da/dN vs. $\Delta$K$\sb{\rm eff}$ relation is a unique material property independent of crack length. The variation of crack …
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Surfactant Behavior in Atmospheric Aerosols
… nuclei counter (CFSTGC) to measure the CCN activity. We found that organic films of oleic acid and stearic acid formed at all atmospherically relevant conditions (high ionic content and pH 0-8), though the efficacy of the surface film at depressing surface tension changed as the …
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Sensitivity of black carbon aging to modeling assumption in CAM-chem
… of its climate-relevant properties, such as CCN activity and optical properties. One key process that needs to be captured is the BC aging process, that is the conversion of fresh, hydrophobic black carbon into aged, hydrophilic black carbon, which directly contributes to CCN activation and …
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Normalizing the Abnormal: Self-Identified Traumatic Events and Critical Care Nurses, A Focused Ethnography
… health (Bowie, 2022). Critical care nurses (CCNs) encounter singular and often repetitive traumatic events (TEs) within the work environment, which lead to adverse effects such as anxiety, depression, post-traumatic stress disorder, secondary traumatic stress disorder, burnout, compassion …
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