The effects of a static external electric field on the ground state electronic structure of a porphine-quinone (PQ) complex have been studied by using density functional theory (DFT). The energies of the excited states have been calculated with time-dependent density functional theory (TDDFT) and wi

The purpose of this study was to describe and determine the prevalence of decision-making characteristics of recreational backcountry groups when making a decision of where to travel and ride in avalanche terrain from the perspective of individuals. Decision-making characteristics encompassed commun

Since the Roberts Ranch Buffalo Jump (5LR100) was first reported on in 1971, there has been a great deal of research on bison kills and faunal analysis, as well as advancements in analytic techniques, that can now be applied to the collection from the site. Much of the collection was reported in a t

Seasonal snowfall is the largest component of the water budget in many mountain headwater regions around the world. In addition to sustaining biological water needs in drier, lower elevation areas throughout the year, mountain snowpack also provides essential water inputs to the Critical Zone (CZ) -

Il y a 28 millions d'années, l'une des plus grandes éruptions explosives connues a pris place dans le sud de l'actuel Colorado, aux États-Unis. Cette unité volcanique, dénommée le Tuf de Fish Canyon, ainsi que deux plus petites éruptions qui lui sont associées, ont permis d'étudier plusieurs aspects

Estimating snow mechanical properties – such as elastic modulus, stiffness, and strength – is important for understanding how effectively a vehicle can travel over snow-covered terrain. Vehicle instrumentation data and observations of the snowpack are valuable for improving the estimates of winter v

Congestive heart failure, secondary to pulmonary hypertension, has historically been considered a disease associated with high altitude exposure. The disease was first reported to occur at altitudes over 2,440 m (8,000 ft.) and so became known as "high altitude disease". One common clinical sign due

This dissertation focuses on the kinematic evolution of contractional tectonics: the Himalayan fold-thrust belt along the collisional orogenic belts, and growth of the basement-cored monoclines in Colorado Plateau. Ongoing Himalayan growth is generally thought to be dominated by duplexing and/or ext

Abstract Body condition is an important life history challenge that directly impacts individual fitness and is particularly important for hibernating animals, whose maintenance of adequate body fat and mass is essential for survival. It is well documented that symbiotic microorganisms play a vital r

Collaborative forest restoration can reduce conflicts over natural resource management and improve ecosystem function after decades of degradation. Scientific evidence helps collaborative groups avoid undesirable outcomes as they define goals, assess current conditions, design restoration treatments

Historical investigations of the Social Hygiene Movement (1890s-1930s) tend to focus on the urban origins of the concerns that sparked much of the resulting reform efforts. Furthermore, archaeological investigations that address artifacts associated with the Social Hygiene Movement often focus on ei

The El Vado Sandstone Member (late Coniacian) of the Mancos Shale is considered by many to be an important unconventional hydrocarbon resource target (Ridgley, 2001) in the San Juan Basin located in northwestern New Mexico. The shelf sandstones of the El Vado were deposited along the western margin

El objetivo de la presente tesis doctoral es evaluar la evolución geomorfológica del valle de Ullum-Zonda y las condiciones paleoambientales que prevalecieron en esta depresión durante el Cuaternario tardío. Para ello, se efectuó un análisis geomorfológico, morfotectónico y neotectónico de este vall

Stone circle sites are notorious for low artifact frequencies. This deters archaeological study because low artifact frequencies are thought to limit research potential. Two stone circle sites, Killdeer Canyon (5LR289) and T-W Diamond (5LR200) offer insight into short-term habitations, despite their

In the next decade, climate models suggest that global temperatures will continue to rise. In the western United States, increases in temperatures and changes in precipitation patterns will escalate the risk of drought conditions. These potentially warmer, drier conditions could induce physiological

A luxury shift has occurred and been reflected in the way consumers now define luxury.

The headwater basins of Colorado are heavily relied upon for freshwater resources on an annual basis. However, knowledge concerning generation of such resources, and implications of climate change on their availability in the future, is not well understood. Thus, this research has been undertaken to

The ecological impacts of selenium have been studied for decades and regulatory standards established in an effort to mitigate them. Agricultural activities in regions with high levels of alluvial selenium can lead to in-stream levels that far exceed regulatory limits. Agricultural best management p

The aim of this work was to assess the performance of the Kipp and Zonen Large Aperture Scintillometer (LAS; Delft, Netherlands) to predict surface sensible heat flux (H). The LAS was introduced approximately 30 years ago and has been marketed as an indirect tool for the estimation of vegetation eva

Plants play a central role in structuring nearly all terrestrial communities and providing ecosystem services. As ectothermic organisms, the synchronization of plant and insect life history events (phenology) are strongly dependent on temperature and precipitation, two of the major components of cli