Entire DC Network | Open Access Articles | Digital Commons Network™

Evaluation Of Radio-Transmitters On Juvenile Rabbits: Application To The Semifossorial Pygmy Rabbit (Brachylagus Idahoensis), Wendy A. Estes-Zumpf, Janet L. Rachlow

Western North American Naturalist

No abstract provided.

Go to article

Anthropogenic Threat To The Desert Tortoise (Gopherus Agassizii): Litter In The Mojave Desert, Andrew D. Walde, Meagan L. Harless, David K. Delaney, Larry L. Pater

Western North American Naturalist

No abstract provided.

Go to article

Tongass: Pulp Politics And The Fight For The Alaska Rain Forest By Kathie Durbin, Clayton M. White

Western North American Naturalist

No abstract provided.

Go to article

Modeling Distributions Of Rare Plants In The Great Basin, Western North America, M. Aitken, D. W. Roberts, L. M. Shultz

Western North American Naturalist

In this 2-phase study, we developed field-validated site and landscape-level predictive models for identifying potential rare and endemic plant habitat in the Great Basin of western North America. Four species were chosen to include a range of environmental variability and plant communities. Herbarium records of known occurrences were used to identify initial sample sites. The geographic coordinates, environmental attributes, and vegetation data collected at each site were used to develop 2 predictive models for each species: a field key and a probability-of-occurrence or predictor map. The field key was developed using only field data collected at the sites on environmental …

Go to article

Monitoring With A Modified Robel Pole On Meadows In The Central Black Hills Of South Dakota, Daniel W. Uresk, Ted A. Benzon

Western North American Naturalist

This study using a modified Robel pole was conducted in the central Black Hills, South Dakota. The objectives were to test the relationship between visual obstruction readings and standing herbage, develop guidelines for monitoring, and estimate sample size. The relationship between visual obstruction and standing herbage was linear with 2 segments in a piecewise model. Regression coefficients were highly significant (P ≤ 0.001). Standard error of the estimate for a single mean was 373 kg · ha⁻¹. Herbage ranged from 89 to 3821 kg · ha⁻¹ with a mean of 1416 kg · ha⁻¹. …

Go to article

Food And Habitat Relationships Of Claassenia Sabulosa (Plecoptera: Perlidae) In The Upper Colorado River, Colorado, Richard A. Thorp, Jeremy B. Monroe, Emily C. Thorp, Todd Wellnitz, N. Leroy Poff

Western North American Naturalist

Streambed surveys were conducted along the upper Colorado River, Colorado, to describe the distributions of Claassenia sabulosa larvae in relation to current speed and to determine their diets. We also addressed diel feeding periodicity by sampling during both day and night. Claassenia sabulosa was more abundant in riffle habitats than in runs. A positive relationship existed between C. sabulosa abundance and stream current, with larval size increasing with current speed. Chironomidae, Baetidae, and Simulidae collectively accounted for 93% of the prey found in stonefly guts; however, these categories were not consumed equally by all C. sabulosa. Smaller C. sabulosa …

Go to article

Vegetation Changes After Livestock Grazing Exclusion And Shrub Control In The Southern Chihuahuan Desert, Ricardo Mata-González, Benjamín Figueroa-Sandoval, Fernando Clemente, Mario Manzano

Western North American Naturalist

Vegetation cover and production were evaluated after nearly 7 years of livestock grazing exclusion and shrub control in an area with a long history of heavy livestock grazing in the southern Chihuahuan Desert, Mexico. An exclosure was established to prevent livestock grazing. In half of the excluded area, the main shrub, Larrea tridentata, was mechanically controlled. Outside the exclosure, heavy livestock grazing occurred as customary and shrubs were not controlled. Absence of grazing resulted in 50% higher grass cover and 35% higher total biomass. Larrea tridentata cover was twice as high on the grazed area as on the ungrazed …

Go to article

Characteristics Of Columbia Spotted Frog (Rana Luteiventris) Oviposition Sites In Northeastern Oregon, Usa, Christopher A. Pearl, Michael J. Adams, Wendy H. Wente

Western North American Naturalist

Several western ranid frogs possess a unique strategy of breeding communally over a short temporal window and reusing oviposition sites between years. However, little is published on the characteristics of oviposition sites selected by these explosive breeders. The Columbia spotted frog (Rana luteiventris) is native to northwestern North America and is of conservation concern in the southern portions of its range. As part of a study examining relationships between livestock grazing and R. luteiventris habitat, we assessed characteristics of the species' oviposition sites in 25 fishless ponds in northeastern Oregon. Oviposition sites were generally in shallow water (<25 cm) close to shore and tended to be in the northeastern portion of ponds. Oviposition sites were found more frequently over heavily vegetated substrates and in areas of less substrate slope and shade than random points in littoral zones. We did not quantify temperature differences within ponds, but the patterns we documented are consistent with preferential use of warmer microhabitats for oviposition.

Go to article

Dispersal And Extraterritorial Movements Of Swift Foxes (Vulpes Velox) In Northwestern Texas, Kerry L. Nicholson, Warren B. Ballard, Brady K. Mcgee, Heather A. Whitlaw

Western North American Naturalist

Dispersal plays an important role in the population dynamics of many carnivores, yet little information exists about the dispersal and movement patterns of swift foxes (Vulpes velox). We radio-collared and monitored 68 swift foxes for dispersal at 2 study sites in northwestern Texas from January 2002 to April 2004. Dispersal distance for juveniles (13.1 ± 0.3 km, s), adults (10 ± 4.7 km) and transients (25.4 ± 9.1 km) did not differ by age class (F = 1.49, df = 2, P = 0.24) or sex (F = 0.23, df = 1, P = 0.63) …

Go to article

Potential Contribution Of Respiration By Anabrus Simplex (Mormon Crickets) To Net Co2 Exchange In Three Great Basin Ecosystems, A. Joshua Leffler, Michael S. Peek, Larry Hipps, Sasha Ivans, Ronald J. Ryel, Martyn M. Caldwell

Western North American Naturalist

Disturbance events can significantly influence net CO₂ exchange (NCE) in ecosystems. High densities of Anabrus simplex (Mormon crickets) periodically afflict large areas of the western USA; their sheer numbers could make them a significant source of CO₂. We modeled cricket respiration at the ecosystem level using air and body temperatures and insect gas exchange measurements. Cricket CO₂ efflux values were compared to ecosystem CO₂ flux from eddy covariance measurements in 3 Great Basin ecosystems: a juniper woodland, a sagebrush shrubland, and a crested wheatgrass pasture. Mean respiration from Mormon crickets was 0.96 g CO_{2 …}

Go to article

Sex And The Lonely Atriplex, D. Carl Freeman, E. Durant Mcarthur, Kathleen J. Miglia, Michelle J. Nilson, Michelle L. Brown

Western North American Naturalist

No abstract provided.

Go to article

Grit Size Preferences And Confirmation Of Ingested Lead Pellets In Chukars (Alectoris Chukar), Randy T. Larsen, Jerran T. Flinders, Dean L. Mitchell, Ernest R. Perkins

Western North American Naturalist

No abstract provided.

Go to article

The Niemann-Pick Type C2 Protein Loads Isoglobotrihexosylceramide Onto Cd1d Molecules And Contributes To The Thymic Selection Of Nkt Cells, Paul B. Savage, Nicolas Schrantz, Yuval Sagiv, Yang Liu, Albert Bendelac, Luc Teyton

Faculty Publications

The Niemann-Pick type C2 (NPC2) protein is a small, soluble, lysosomal protein important for cholesterol and sphingolipid transport in the lysosome. The immunological phenotype of NPC2-deficient mice was limited to an impaired thymic selection of Valpha 14 natural killer T cells (NKT cells) and a subsequent reduction of NKT cells in the periphery. The remaining NKT cells failed to produce measurable quantities of interferon-gamma in vivo and in vitro after activation with alpha-galactosylceramide. In addition, thymocytes and splenocytes from NPC2-deficient mice were poor presenters of endogenous and exogenous lipids to CD1d-restricted Valpha 14 hybridoma cells. Importantly, we determined that similar …

Go to article

Preparing A Surpassing Moral Force: The Dynamics Of The Brigham University Singers, David Ray Burton

Theses and Dissertations

This is a qualitative study that takes a close look at an exemplary performing group, the Brigham Young University Singers. Using the methods of phenomenology and naturalistic inquiry, the author presents a rich, thick description of the daily activities and unique culture of the choir. Both strengths and weaknesses of the group are identified so that others can have an authentic, vicarious experience through reading the Singers' story. The author also identifies seven principles that contribute to the success of the group so that other choral conductors can adapt them to their own unique situations. Educators in all disciplines can …

Go to article

Networks And Cultural Bridges: A Case Study With The Tarahumara Of Northern Mexico, Jennifer Marie Nations

Theses and Dissertations

Network and cultural bridge theories predict the source and durability of cultural boundaries, including how cultural boundaries are overcome in order for differing groups to have meaningful exchanges. Ethnographic interview data with three research subjects in Northern Mexico reveals the strengths and weaknesses of each theory. Minita Bustillos, Juan Daniel Villalobos, and Horacio Echeverría contribute to bridging ties between the closed indigenous community of the Tarahumara and outside Mexican and American groups. Their positions elucidate the veracity of theoretical propositions found in network and cultural bridge theories. Findings suggest that though useful in understanding several aspects of network structure and …

Go to article

Fresh Water Ecology Unit For Secondary Education Science Courses, Eric L. Hyer

Theses and Dissertations

Science means “to know", a process for gaining knowledge and an understanding of the natural world. Students need to be involved in active learning. In other words, they must do science, not just hear about it. Good science encourages students to gain knowledge by doing science: observing, questioning, exploring, making and testing hypotheses, comparing predictions, evaluating data, and communicating conclusions. This unit plan is designed to incorporate the components of fresh water, ecology, water quality, and a class-wide science project. Each lesson addresses selected standards from the state core curriculum and has specific objectives that are tied to the learning …

Go to article

Analyses Of Greater Sage-Grouse (Centrocercus Urophasianus) Translocation Release Methods And Chick Survival In Strawberry Valley, Utah, Jordan P. Hennefer

Theses and Dissertations

Manuscript No. 1 Recent research has indicated that low nest success and juvenile survival of Greater Sage-Grouse may be responsible for population declines. Recent technological advances in micro-transmitters have made radio-telemetry studies on Sage-Grouse chicks more common. Radio-telemetry enables monitoring of individual chicks and broods during a critical period of their life history. The exact cause of low chick recruitment in Strawberry Valley has not been well understood. In 2006, a chick mortality study using micro-transmitters was initiated to (1) determine the causes of chick mortality, (2) calculate overall chick survival, (3) compare chick survival in the Strawberry Valley population …

Go to article

Calibration Procedure For A Microscopic Traffic Simulation Model, Carole Turley

Theses and Dissertations

The inputs to a microscopic traffic simulation model generally include quantitative, but immeasurable data describing driver behavior and vehicle performance characteristics. Engineers often use default values for parameters such as car-following sensitivity and gap acceptance because it can be difficult to obtain accurate estimates for these parameters. While recent research has indicated that the accuracy of a simulation model can significantly improve if driver behavior parameters are calibrated to local data, this is not a typical practice. Manual calibration of these parameters is often too time-consuming to be cost-effective. Researchers have applied automated calibration procedures using genetic algorithms to these …

Go to article

Structure And Nitrogen Chemistry In Coal, Biomass, And Cofiring Low-Nox Flames, Bradley David Damstedt

Theses and Dissertations

Addressing global climate change will require increasing sustainable energy usage. Cofiring biomass fuels with coal for electrical power generation is an efficient, cost effective method of CO2 mitigation. This work is an experimental investigation of the flame structure and nitrogen chemistry differences occurring between coal, biomass and cofiring flames. A pilot-scale facility was fired with a dual-feed low-NOx burner capable of independently conveying 2 separate fuels unblended to the burner. Spatially detailed gas species measurements were made for 8 flames, including a coal, straw, finely ground straw, wood, and 4 straw/coal cofiring flames. Particle samples were also obtained from 5 …

Go to article

Pyridinium Bis-Retinoids: Extraction, Synthesis, And Folate Coupling, Mary Allison Alvarez

Theses and Dissertations

This thesis is divided into two parts.Part I describes the organic extraction, separation, and liquid chromatographic-mass spectrometric analysis of chromophores from human and bovine retinal pigment epithelium. Flurorophores in the retinal pigment epithelium have been implicated in age related macular degeneration. In addition, the synthesis and characterization of a number of bis-retinoid type compounds that may potentially be found in such extracts, or that may be used for insight into pyridinium bis-retinoid reactivity, was accomplished.Part II describes a study of pyridinium bis-retinoid-folic acid coupling with respect to linker type, linker length, and nature of the linkage. Folic acid has been …

Go to article

The Role Of Prolactin In Ccl28 Regulation, Jennie Hyde

Theses and Dissertations

Infants are born with naive immune systems, making them susceptible to a variety of infections. In order to protect the newborn infant it is important that mothers be able to pass protective IgA antibodies to their infants through breast milk. B cells that produce IgA enter the mammary tissue during lactation and secrete IgA into the milk. During pregnancy, the mammary tissue expresses high levels of chemokines, molecules that allow lymphocytes to selectively home to specific tissues. The chemokine CCL28 has been shown to be upregulated during both pregnancy and lactation, and is vital for the ability of IgA-producing B …

Go to article

Stylized Hatching For 3d Animation, Trent Fielding Crow

Theses and Dissertations

Much research has been done in creating non-photorealistic renderings of objects that mimic the look of hand-made drawings by traditional artists. This thesis extends work in this area by presenting an NPR hatching method that can be applied to 3D animated films to help them feel more hand drawn. In contrast to most other NPR methods, this method preserves the 3D lighting and effects of the film that make it interesting to watch. This process includes a procedural algorithm to create a hatching pattern that can be easily integrated into any film's pipeline that uses Renderman. In addition, we create …

Go to article

Bounds And Conditions: A Kolob In Our Solar System?, David D. Allred

Faculty Publications

In 2003, Dialogue ran adjacent essays by two scientists, David Tolman and David Allred. The two Davids had been students together at Princeton, attending the same student ward. Decades after Princeton, Tolman had left Mormonism and Allred had stayed. Their essays are a fascinating juxtaposition. In the course of his piece, David Allred ventured for a few paragraphs into a discussion of the planet Jupiter and its role as a governor and protector in our solar system—a type of Kolob. Although the other author dismissed the topic as “fanciful physics,” my own interest was piqued. I asked Dr. Allred, who …

Go to article

Teaching One Way And Testing Another: An Interview With Scott Howell, Scott L. Howell, James L. Morrison

Faculty Publications

I first met Scott Howell in 2005 in Jekyll Island, Georgia at the annual Distance Learning Administration (DLA) conference, which was sponsored in part by the Online Journal of Distance Learning Administration (OJDLA). Scott is co-editor of the three-volume book series Online Assessment and Measurement (2005) published by IDEA group and is this year's chair of the University Continuing Education Association's (UCEA) Distance Learning Community of Practice (DLCoP). His keynote speech at the DLA conference featured a number of assessment issues and best practices. However, when I sat down to interview him, he quickly focused on one topic for which …

Go to article

Report Of The Meeting Of The North American Coordinating Council On Japanese Library Resources, Journal Of East Asian Libraries

Journal of East Asian Libraries

No abstract provided.

Go to article

The Accidental Memoirs Of An Accidental Cataloger, Doris Seely

Journal of East Asian Libraries

No abstract provided.

Go to article

Full Issue

Swiss American Historical Society Review

No abstract provided.

Go to article

Water In Beaver Dam Wash And Lytle Preserve, Stanley L. Welsh

Books by Faculty of the Monte L. Bean Life Science Museum

This short work is derived from a manuscript prepared for presentation in a water adjudication hearing, following a proposal to pipe water from wells in Beaver Dam Wash for transfer across state lines to be used for culinary and other purposes in Mesquite, Nevada. The Wash is estimated to yield 2000 acre feet of water annually, mostly as subsurface flow, at the Arizona line. About a third of that amount is already appropriated by users along the Wash in Utah, but there are applications pending for more than 100,000 acre feet in Utah. Thus, the Wash is already oversubscribed by …

Go to article

Avpv Neurons Containing Estrogen Receptor-Beta In Adult Male Rats Are Influenced By Soy Isoflavones, Edwin D. Lephart, Lihong H. Bu

Faculty Publications

Background Isoflavones, the most abundant phytoestrogens in soy foods, are structurally similar to 17beta-estradiol. It is known that 17beta-estradiol induces apoptosis in anteroventral periventricular nucleus (AVPV) in rat brain. Also, there is evidence that consumption of soy isoflavones reduces the volume of AVPV in male rats. Therefore, in this study, we examined the influence of dietary soy isoflavones on apoptosis in AVPV of 150 day-old male rats fed either a soy isoflavone-free diet (Phyto-free) or a soy isoflavone-rich diet (Phyto-600). Results: The occurrence of apoptosis in AVPV was examined by TUNEL staining. The incidence of apoptosis was about 10 times …

Go to article

Human–Robot Interaction: A Survey, Michael A. Goodrich, Alan C. Schultz

Faculty Publications

Human–Robot Interaction (HRI) has recently received considerable attention in the academic community, in labs, in technology companies, and through the media. Because of this attention, it is desirable to present a survey of HRI to serve as a tutorial to people outside the field and to promote discussion of a unified vision of HRI within the field. The goal of this review is to present a unified treatment of HRI-related problems, to identify key themes, and discuss challenge problems that are likely to shape the field in the near future. Although the review follows a survey structure, the goal of …

Go to article

Full-Text Articles in Entire DC Network

Evaluation Of Radio-Transmitters On Juvenile Rabbits: Application To The Semifossorial Pygmy Rabbit (Brachylagus Idahoensis), Wendy A. Estes-Zumpf, Janet L. Rachlow

Western North American Naturalist

Anthropogenic Threat To The Desert Tortoise (Gopherus Agassizii): Litter In The Mojave Desert, Andrew D. Walde, Meagan L. Harless, David K. Delaney, Larry L. Pater

Western North American Naturalist

Tongass: Pulp Politics And The Fight For The Alaska Rain Forest By Kathie Durbin, Clayton M. White

Western North American Naturalist

Modeling Distributions Of Rare Plants In The Great Basin, Western North America, M. Aitken, D. W. Roberts, L. M. Shultz

Western North American Naturalist

Monitoring With A Modified Robel Pole On Meadows In The Central Black Hills Of South Dakota, Daniel W. Uresk, Ted A. Benzon

Western North American Naturalist

Food And Habitat Relationships Of Claassenia Sabulosa (Plecoptera: Perlidae) In The Upper Colorado River, Colorado, Richard A. Thorp, Jeremy B. Monroe, Emily C. Thorp, Todd Wellnitz, N. Leroy Poff

Western North American Naturalist

Vegetation Changes After Livestock Grazing Exclusion And Shrub Control In The Southern Chihuahuan Desert, Ricardo Mata-González, Benjamín Figueroa-Sandoval, Fernando Clemente, Mario Manzano

Western North American Naturalist

Characteristics Of Columbia Spotted Frog (Rana Luteiventris) Oviposition Sites In Northeastern Oregon, Usa, Christopher A. Pearl, Michael J. Adams, Wendy H. Wente

Western North American Naturalist

Dispersal And Extraterritorial Movements Of Swift Foxes (Vulpes Velox) In Northwestern Texas, Kerry L. Nicholson, Warren B. Ballard, Brady K. Mcgee, Heather A. Whitlaw

Western North American Naturalist

Potential Contribution Of Respiration By Anabrus Simplex (Mormon Crickets) To Net Co2 Exchange In Three Great Basin Ecosystems, A. Joshua Leffler, Michael S. Peek, Larry Hipps, Sasha Ivans, Ronald J. Ryel, Martyn M. Caldwell

Western North American Naturalist

Sex And The Lonely Atriplex, D. Carl Freeman, E. Durant Mcarthur, Kathleen J. Miglia, Michelle J. Nilson, Michelle L. Brown

Western North American Naturalist

Grit Size Preferences And Confirmation Of Ingested Lead Pellets In Chukars (Alectoris Chukar), Randy T. Larsen, Jerran T. Flinders, Dean L. Mitchell, Ernest R. Perkins

Western North American Naturalist

The Niemann-Pick Type C2 Protein Loads Isoglobotrihexosylceramide Onto Cd1d Molecules And Contributes To The Thymic Selection Of Nkt Cells, Paul B. Savage, Nicolas Schrantz, Yuval Sagiv, Yang Liu, Albert Bendelac, Luc Teyton

Faculty Publications

Preparing A Surpassing Moral Force: The Dynamics Of The Brigham University Singers, David Ray Burton

Theses and Dissertations

Networks And Cultural Bridges: A Case Study With The Tarahumara Of Northern Mexico, Jennifer Marie Nations

Theses and Dissertations

Fresh Water Ecology Unit For Secondary Education Science Courses, Eric L. Hyer

Theses and Dissertations

Analyses Of Greater Sage-Grouse (Centrocercus Urophasianus) Translocation Release Methods And Chick Survival In Strawberry Valley, Utah, Jordan P. Hennefer

Theses and Dissertations

Calibration Procedure For A Microscopic Traffic Simulation Model, Carole Turley

Theses and Dissertations

Structure And Nitrogen Chemistry In Coal, Biomass, And Cofiring Low-Nox Flames, Bradley David Damstedt

Theses and Dissertations

Pyridinium Bis-Retinoids: Extraction, Synthesis, And Folate Coupling, Mary Allison Alvarez

Theses and Dissertations

The Role Of Prolactin In Ccl28 Regulation, Jennie Hyde

Theses and Dissertations

Stylized Hatching For 3d Animation, Trent Fielding Crow

Theses and Dissertations

Bounds And Conditions: A Kolob In Our Solar System?, David D. Allred

Faculty Publications

Teaching One Way And Testing Another: An Interview With Scott Howell, Scott L. Howell, James L. Morrison

Faculty Publications

Report Of The Meeting Of The North American Coordinating Council On Japanese Library Resources, Journal Of East Asian Libraries

Journal of East Asian Libraries

The Accidental Memoirs Of An Accidental Cataloger, Doris Seely

Journal of East Asian Libraries

Full Issue

Swiss American Historical Society Review

Water In Beaver Dam Wash And Lytle Preserve, Stanley L. Welsh

Books by Faculty of the Monte L. Bean Life Science Museum

Avpv Neurons Containing Estrogen Receptor-Beta In Adult Male Rats Are Influenced By Soy Isoflavones, Edwin D. Lephart, Lihong H. Bu

Faculty Publications

Human–Robot Interaction: A Survey, Michael A. Goodrich, Alan C. Schultz

Faculty Publications