Showing papers by "Boise State University published in 2002"

Hormones, developmental plasticity and adaptation

Abstract: Phenotypic plasticity is the extent to which an organism can change its physiology, behaviour, morphology and/or development in response to environmental cues. Environmentally induced differences in the endocrine system are among the underlying causes of phenotypic plasticity. For example, maternal and other environmental influences on developing young can affect the range of physiological and behavioural responses available to them as adults. The mechanisms underlying phenotypic plasticity can be elucidated using multidisciplinary approaches, in which the dynamic interactions among developmental, hormonal and environmental factors are considered. Such studies point to the importance of considering the overall developmental trajectory of an organism when assessing the adaptive value of phenotypic variation, rather than simply evaluating the individual at a single point in time.

An Intentions-Based Model of Entrepreneurial Teams’ Social Cognition*

Abstract: Research has identified crucial antecedents of corporate entrepreneurship. Research has also identified crucial antecedents of entrepreneurial thinking. This article uses lessons from social cognition to explicitly link these two issues. We adapt an intentions-based model of how to promote entrepreneurial thinking from its original domain of individual entrepreneurship and translate that model to the domain of corporate entrepreneurship. From our intentions-based model of the social cognition of entrepreneurial teams, we emphasize the importance of perceptions of desirability and feasibility and that these perceptions are from the team as well as the individual perspective. This leads to three propositions about entrepreneurial teams and an outline of the opportunities for future research.

Microwave acoustic materials, devices, and applications

Abstract: This paper surveys applications of acoustic waves in microwave devices. After a general and historical introduction to bulk acoustic waves (BAWs), surface acoustic waves (SAWs), practical wave types, and acoustoelectric transducers, a review is given of technologically important materials for microwave acoustic applications. Following this, we discuss BAW and SAW microwave devices and their technologies. Specifically reviewed are thin-film resonators and filters, transversal filters, and filters for correlative analog signal processing. Finally, an overview of the most important microwave applications is given, along with manufacturing and packaging issues.

Neutrophil priming in host defense: role of oxidants as priming agents

Abstract: Neutrophils play an essential role in the body's innate immune response to infection. To protect the host, these phagocytic cells possess an impressive array of microbicidal weapons that can be brought to bear on an invading pathogen, including a variety of toxic oxygen radical species and proteolytic enzymes. Although the neutrophil response is designed to restrict the damage to the smallest possible region where the pathogen is located, some of the damaging agents inevitably leak into the surrounding areas where they have the capacity to inflict tissue damage at sites of inflammation. Thus, it is essential that the host defense response of these cells is finely tuned to result in the appropriate level of response to any given situation. One of the regulatory mechanisms implicated in controlling neutrophil responses is priming. Through the action of priming agents, the level of activation and subsequent responses of the cell can be regulated so that a continuum of activation states is achieved. In this review, we describe key features of the priming response in host defense and disease pathogenesis and focus on the unique role of reactive oxygen species as priming agents.

Examination of the efficacy of an appearance-focused intervention to reduce UV exposure.

Abstract: This study designed and implemented an appearance-based skin cancer prevention intervention in college-aged females. One hundred and forty-seven respondents were randomly assigned to treatment or control groups. Treatment respondents received a short workbook describing the appearance damaging effects of indoor tanning. At short-term follow-up (2 weeks later) treatment respondents had significantly more negative attitudes toward indoor tanning, and reported fewer intentions to indoor tan. At 2-month follow-up, treatment respondents reported indoor tanning one-half as much as control respondents in the previous 2 months. This appearance-based intervention was able to produce clinically significant changes in indoor tanning use tendencies that could have a beneficial effect on the future development of skin cancer.

“Feminine Protection”: The Effects of Menstruation on Attitudes Towards Women

Abstract: An experiment tested the hypothesis that reminders of a woman's menstrual status lead to more negative reactions to her and increased objectification of women in general. Participants interacted with a female confederate who ostensibly accidentally dropped either a tampon or hair clip out of her handbag. Dropping the tampon led to lower evaluations of the confederate's competence, decreased liking for her, and a marginal tendency to avoid sitting close to her. Furthermore, gender schematic participants responded to the reminder of menstruation with increased objectification of women in general, an effect we view as an effort to “protect” culturally sanitized views of the feminine. These findings are discussed from the perspective of feminist theory and a terror management perspective on the role of ambivalence about the human body in the objectification of women.

The Zung Self-Rating Depression Scale: convergent validity and diagnostic discrimination.

Abstract: This study examined the concurrent validity of the Zung Self-Rating Depression Scale (SDS) in relation to the Depression (D) scale of the Minnesota Multiphasic Personality Inventory-2 (MMPI-2) and addressed a gap in the literature with respect to diagnostic discrimination. The participants were persons on probation or parole. Although women were more depressed than men on the SDS, gender did not interact with SDS as a predictor in a logistic regression analysis. The SDS was found to be the primary discriminating variable in distinguishing depressed from nondepressed participants. In addition, the SDS contributed significant incremental validity over the D scale and showed greater accuracy in identifying nondepressed individuals.

Phylogenetic analysis of North American Elymus and the monogenomic Triticeae (Poaceae) using three chloroplast DNA data sets.

Abstract: Although the monogenomic genera of the Triticeae have been analyzed in numerous biosystematic studies, the allopolyploid genera have not been as extensively studied within a phylogenetic framework. We focus on North American species of Elymus, which, under the current genomic system of classification, are almost all allotetraploid, combining the St genome of Pseudoroegneria with the H genome of Hordeum. We analyze new and previously published chloroplast DNA data from Elymus and from most of the monogenomic genera of the Triticeae in an attempt to identify the maternal genome donor of Elymus. We also present a cpDNA phylogeny for the monogenomic genera that includes more data than, and thus builds on, those previously published. The chloroplast DNA data indicate that Pseudoroegneria is the maternal genome donor to all but one of the Elymus individuals. There is little divergence among the Elymus and Pseudoroegneria chloroplast genomes, and as a group, they show little divergence from the rest of the Triticeae. Within the monogenomic Triticeae, the problematic group Thinopyrum is resolved as monophyletic on the chloroplast DNA tree. At the intergeneric level, the data reveal several deeper-level relationships that were not resolved by previous cpDNA trees.

Divergence or Convergence: A Cross‐National Comparison of Personnel Selection Practices

Abstract: Striking a balance between globalization and localization in human resource management (HRM) requires a better understanding of the cross-national differences in terms of both the status quo and the socially desirable HRM practices. With this purpose in mind, we examined the hiring practices in ten different countries or regions using the Best International Human Resource Management Practices Survey (BIHRMPS). Our empirical findings revealed more divergence than convergence in current recruiting practices, but they also suggest that organizations around the world are indeed in the process of converging on ways of recruitment even though the current selection criteria may still be driven by each country's prevalent cultural values. © 2002 Wiley Periodicals, Inc.

Understanding human ambivalence about sex: The effects of stripping sex of meaning

Abstract: We offer a theoretical perspective to provide insight into why people are ambivalent about sex and why cultures regulate sex and attach symbolic meaning to it. Building on terror management theory, we propose that sex is problematic for humankind in part because it reminds us of our creaturely mortal nature. Two experiments investigated the effects of reminding people of the similarity between humans and other animals on their reactions to the physical aspects of sex. In Study 1, priming human‐animal similarities led to increased accessibility of death‐related thoughts after thinking about the physical but not romantic aspects of sex. In Study 2, when participants were reminded of similarities between humans and other animals, mortality salience resulted in decreased attraction to the physical but not romantic aspects of sex. In each study, priming thoughts about how humans are distinct from animals eliminated the association between sex and death.

How isotopic fractionation of snowmelt affects hydrograph separation

Abstract: We present the isotopic composition of meltwater samples from four seasonal snowpacks: a warm, maritime snowpack in California; a temperate continental snowpack in Vermont; a cold continental snowpack in Colorado; and an Arctic snowpack in Alaska. Despite the very different climate conditions the υ 18 O of meltwater from all four snowpacks increased as melting progressed. This trend is consistent with theoretical results that model isotopic exchange between water and ice as meltwater percolates through a snowpack. We have estimated the systematic error in the hydrograph separation if the isotopic composition of a snow core were used in place of that of meltwater. Assuming no error in the old water or stream water values, the error in the new water fraction depends on: (1) the isotopic difference between the snow core and the old water; (2) the isotopic difference between the snow core and the meltwater; and (3) the new water fraction contributing to the stream flow during a spring melt event. The error is large when snowmelt contributes a dominant fraction of the stream flow, which may be expected where infiltration of snowmelt is limited (e.g. permafrost, urban areas). A particular challenge will be how to incorporate the changes in isotopic composition of meltwater measured at a point into hydrograph separation models conducted at the watershed scale. Published in 2002 by John Wiley & Sons, Ltd.

Hierarchical geostatistics and multifacies systems: Boise Hydrogeophysical Research Site, Boise, Idaho

Abstract: [1] The geostatistical structure of a heterogeneous coarse fluvial aquifer is investigated with porosity data derived from neutron logs at a research well field (Boise Hydrogeophysical Research Site, or BHRS) that was designed, in part, to support three-dimensional geostatistical analysis of hydrologic and geophysical parameters. Recognizing that the coarse fluvial deposits include subdivisions (units between bounding surfaces), we adopt a hierarchical approach and examine the porosity geostatistics of the aquifer at three scales. At the BHRS, the saturated fluvial deposits as a whole (maximum interwell spacing ∼80 m, thickness ∼16–18 m) are at hierarchical level 1; five subhorizontal units within these deposits (four cobble-dominated units and a channel sand) can be traced across the central area of the BHRS and are at hierarchical level 2; and subunits (patches or lenses) in one of the level 2 units (Unit 4), are at hierarchical level 3. We use variography and porosity statistics to recognize nonstationarity at hierarchical level 1 and in one of the level 2 units (Unit 4) where the means and variances of porosity differences as a function of lag are not constant between distinct units and subunits, respectively. The geostatistical structure at level 1 is modeled with different horizontal and vertical structures that have different sills (vertical sill greater than horizontal sill). The difference in sills can be explained quantitatively by the summing of weighted sills from all individual units and combined units (i.e., a given pair of different units), where the weights are the proportions of data pairs contributing to the sills at each lag from the individual and combined units. Extension of this analysis leads to a weighted, multistructure form of the variogram function whereby a global experimental variogram in a hierarchical system can be decomposed quantitatively into weighted component individual- and combined-unit (or facies) structures for any number of units or hierarchical levels. Such decomposition of the global horizontal variogram from the BHRS indicates that short-range periodicity in that structure is due to both (1) combined-unit structures associated with patches or lenses at hierarchical level 3 in Unit 4 and (2) variations in thickness of Unit 2. For hierarchical multifacies systems, structure models fit to global horizontal and vertical experimental variograms may not be useful for subsequent stochastic modeling if the system on which the structure models are based is nonstationary.

Democracy's Effect on Economic Growth: A Pooled Time-Series Analysis, 1951-1980*

Abstract: The relationship between democracy and economic growth has concerned social scientists since the 17th century, but recent democracy movements make this question especially important today. Do poor countries face a cruel trade-off between democracy and growth? Do democracy and growth go together as a “win-win” proposition? Or is democracy irrelevant to growth? Using pooled annual time-series data from 1951–1980 for 106 countries, including 88 non-core countries, we explore long-term and short-term direct and indirect effects of democracy on growth. Little or no direct effect emerges, but positive indirect effects appear via two mechanisms: a marginally significant effect via investment and a robust effect via government expenditure. Democracy also has a robust non-linear effect on economic growth via social unrest, inhibiting growth under non-democratic regimes and furthering it in highly democratic ones. Combining these findings, we conclude that democracy does not significantly hamper economic growth, and under many circumstances slightly boosts it.

The Undergraduate Research Assistantship: An Analysis of the Benefits.

Abstract: This study documents and quantifies the benefits of serving as an undergraduate research assistant based on the results of a national survey of undergraduate psychology educators (N = 211). The survey consisted of a list of 40 potential benefits, skills, and abilities. Respondents rated each of the items on (a) whether their research assistants attain the benefit, skill, or ability and (b) the importance of each item to an undergraduate education in psychology. Factor analysis revealed 2 major themes: The first factor contained items relating to technical skills, such as math, statistics, writing, and effective communication, whereas items in the second factor pertained to interpersonal benefits. This study provides important information for evaluating the value of the assistantship experience.

Predictors of skin self-examination performance.

Abstract: BACKGROUND Skin self-examination (SSE) may reduce the death rate from melanoma by as much as 63%. Enhancing SSE performance may reduce mortality and morbidity. This study determined predictors of SSE performance in a population of individuals who were at risk of developing melanoma or nonmelanoma skin carcinoma (NMSC). METHODS Patients (n = 200) were asked about their knowledge of the warning signs, their sense of the importance of SSE to them, their attitude about and confidence in their ability to perform SSE, and their impression of their partner's comfort and ability with assisting in the skin examination. The interval since last skin examination, the number of physician visits (nondermatologist and dermatologist), the number and type of skin malignancies, the time since initial diagnosis, the number of skin biopsies, and health insurance status were determined from the medical records for the prior 3 years. RESULTS Seventy percent of participants performed SSE. The three strongest predictors of SSE performance were attitude, having dermatology visits with skin biopsies and at least one skin carcinoma in the previous 3 years, and confidence in performance (P = 0.0001). Other predictors of SSE performance were perceived risk (P = 0.0001), knowledge (P = 0.004), and younger age (P = 0.045). CONCLUSIONS Annual skin examination by physicians and monthly SSE by patients reinforce one another in promoting early detection. In this high-risk population, the dermatologist reinforced SSE performance by biopsy of skin lesions that were skin malignancies. People have intimate knowledge of their own skin and bear the consequences for failure to detect and treat skin carcinoma early; thus, monthly SSE becomes relevant as a personal health-promotion habit. Cancer 2002;95:135–46. © 2002 American Cancer Society. DOI 10.1002/cncr.10637

Quantum melting and absence of Bose-Einstein condensation in two-dimensional vortex matter.

Abstract: We demonstrate that quantum fluctuations suppress Bose-Einstein condensation of quasi-two-dimensional bosons in a rapidly rotating trap. Our conclusions rest in part on the derivation of an exact expression for the boson action in terms of vortex position coordinates, and in part on a solution of the weakly interacting boson Bogoliubov equations, which simplify in the rapid-rotation limit. We obtain analytic expressions for the collective-excitation dispersion, which is quadratic rather than linear. Our estimates for the boson filling factor at which the vortex lattice melts are consistent with recent exact-diagonalization calculations.

Mountain biking injuries: an update

Abstract: This article reviews the available literature regarding injuries in off-road bicyclists. Recent progress in injury research has allowed the description of several patterns of injury in this sport. Mountain biking remains popular, particularly among young males, although sales and participation figures have decreased in the last several years. Competition in downhill racing has increased, while cross-country racing has decreased somewhat in popularity. Recreational riders comprise the largest segment of participants, but little is known about the demographics and injury epidemiology of noncompetitive mountain cyclists. Most mountain bikers participating in surveys reported a history of previous injuries, but prospective studies conducted at mountain bike races have found injury rates of <1%. The most common mechanism of injury involves a forward fall over the handlebars, usually while riding downhill, which can result in direct trauma to the head, torso and upper extremities. A variety of factors can be associated with this type of fall, including trail surface irregularities, mechanical failures and loss of control. In mountain bike racing the risk of injury may be higher for women than men. Minor injuries such as abrasions and contusions occur frequently, but are usually of little consequence. Fractures usually involve the torso or upper extremities, and shoulder injuries are common. Head and face injuries are not always prevented by current helmet designs. Fatal injuries are rare but have been reported. Improvements in safety equipment, rider training and racecourse design are suggested injury prevention measures. The authors encourage continued research in this sport.

American white pelican soaring flight times and altitudes relative to changes in thermal depth and intensity

Abstract: We compared American White Pelican (Pelecanus erythrorhynchos) soaring flight times and altitudes to model-produced estimates of thermal depth and intensity. These data showed that pelican soaring flight was confined to the thermal layer, and that the vertical extent of the soaring flight envelope increased with increases in thermal depth. Pelicans soaring cross-country between foraging and breeding sites flew mainly within the middle of the thermal layer, regardless of its depth. In contrast, pelicans engaged in wandering flight near foraging sites typically confined their flight to the lower thermal layer. Pelicans soaring cross-country likely flew higher in the thermal layer to maximize cross-country soaring performance, while pelicans soaring locally presumably flew lower because additional altitude was unneeded for gliding short distances. An analysis of pelican flight times relative to model-produced estimates of thermal intensity suggested that pelicans began soaring as soon as sufficientl...

College Student's Thoughts About Leaving the University: The Impact of Faculty Attitudes and Behaviors

Abstract: College students at a large Western university (N = 729) were surveyed about 19 potential faculty attitude and behavior items and the items relative impact on student's thoughts about leaving the u...

Brain injury: quality of life's greatest challenge

Abstract: The objectives of this investigation were to (1) identify elements that comprise an acceptable quality of life (Q-L) post-traumatic brain injury (TBI) from the perspectives of patients and families, and (2) explore patient and family satisfaction with treatment decisions relevant to QoL. The authors created, tested, and administered two forms (patient; family) of a 35-question interview to 33 participants in a longitudinal TBI study (14 women, 19 men) and 33 associated family members. Men associated ratings of QoL with numerous variables, while women's responses revealed no significant relationships shared by QoL and other variables. Women reported a poorer QoL than did men. Older patients reported a better QoL than did younger patients. Families emphasized the family relationship, emotional control, and ability to concentrate when considering overall QoL. Patients did not. The majority of patients and families expressed satisfaction with decisions made about acute treatment. QoL research is essential to illuminate best practice models.

Genetic variation in Bromus tectorum (Poaceae): differentiation in the eastern United States.

Abstract: Bromus tectorum, a devastating plant invader in western North America, had entered Pennsylvania by 1790. Although rare, or extirpated, in the east until the 1850s, it was collected with increasing frequency after 1859 from Vermont to Virginia. Using enzyme electrophoresis, we analyzed 38 populations of this grass in the eastern U.S. to determine their genetic variation and structure as well as assess their relatedness to populations in the west. Genetic variation among eastern U.S. populations is low: mean number of alleles per locus (A), percent polymorphic loci per population (%P), and expected heterozygosity (H(exp)) are 1.01, 1.05%, and 0.002, respectively. No heterozygotes were detected. The eastern populations are genetically similar: mean genetic identity for all populations was 0.990 with values among population pairs ranged from 0.913 to 1.000. Thirteen populations in eastern and western North America shared Pgm-1a and Pgm-2a, while eight populations shared Mdh-2b and Mdh-3b. Other alleles detected in western North America (Got-4c, Got-4d, and Pgi-2b) were not, however, found in eastern U.S. populations. The invasion of North America by B. tectorum occurred through multiple introductions on both coasts; results from historical and genetic evidence suggest that eastern populations stem from a minimum of two introductions. The 19th century westward spread of B. tectorum from the East appears to be plausible.

Patterns of CaCO3 deposition in the eastern tropical Pacific Ocean for the last 150 kyr: Evidence for a southeast Pacific depositional spike during marine isotope stage (MIS) 2

Abstract: [1] We constructed biogenic mass accumulation rate (MAR) time series for eastern Pacific core transects across the equator at ~105� and ~85� W and along the equator from 80� to 140� W We used empirical orthogonal function (EOF) analysis to extract spatially coherent patterns of CaCO3 deposition for the last 150 kyr EOF mode 1 (51% variance) is a CaCO3 MAR spike centered in marine oxygen isotope stage 2 (MIS 2) found under the South Equatorial Current EOF mode 2 (19% of variance) is high north of the equator EOF mode 3 (9% of variance) is an east-west mode centered along the North Equatorial Counter Current The MIS 2 CaCO3 spike is the largest event in the eastern Pacific for the last 150 kyr: CaCO3 MARs are 2–3 times higher at 18 ka than elsewhere in the record, including MIS 6 It is caused by high CaCO3 production rather than minimal dissolution EOF 2, while it resembles deep water flow patterns, nevertheless, shows coherence to Corg deposition and is probably also driven by CaCO3 production INDEX TERMS: 4267 Oceanography: General: Paleoceanography; 1615 Global Change: Biogeochemical processes (4805); 1030 Geochemistry: Geochemical cycles (0330); 3022 Marine Geology and Geophysics: Marine sediments—processes and transport; KEYWORDS: late Pleistocene, paleoproductivity, Pacific, calcite, biogeochemistry, carbon cycle

Effects of Practical Life Materials on Kindergartners' Fine Motor Skills.

Abstract: A pretest-posttest control group design was used to measure the effect of practical life materials on public school kindergarten children's fine motor skill development over a 6-month period. The dependent measure was a penny posting test. More than 50 different sets of activities were provided to the experimental group (n = 101). Teachers coached students in following specific steps to use tweezers, tongs, and spoons to manipulate a variety of objects. Students then employed the materials during center time in their classrooms. Although experimental and control group teachers reported equal amounts of fine motor activity in their classrooms, significant interaction effects were found indicating the experimental group outperformed the control on the posttest measure. An overall effect size of 0.74 indicates that the type of fine motor activity is important in children's development.

Discovery of a Possible Anomalous X-Ray Pulsar in the Small Magellanic Cloud

Abstract: We report the serendipitous detection of a previously unreported pulsar from the direction of the Small Magellanic Cloud using data from the Chandra X-Ray Observatory. Because of its luminosity (∼1.5x10^(35) ergs s^(-1)), its near lack of variability for more than 20 yr, and its very soft spectrum, we propose that it is an anomalous X-ray pulsar (AXP). Data from the ROSAT PSPC in conjunction with the Chandra data give a period, P, of 5.44 s and a spin-down time, P/P, of 11 kyr. If this is a correct identification, it will be the first extragalactic AXP and the fastest yet discovered.

Decentralisation of professional development: teachers' decisions and dilemmas

Abstract: This study examines professional development activities under the omnibus Kentucky Education Reform Act and finds them lacking. It addresses three related questions. Are Kentucky teachers, in fact, in charge of their own professional development? What are the formats and foci of the professional development opportunities teachers are planning? How is professional development changing in the increasingly high–stakes environment created by the accountability movement? Analysis of professional development activities reveals systemic weaknesses that are counterproductive to improving teacher quality. Chief among these weaknesses are system–wide ignorance of alternative professional development activities and a failure to define professional development engagement beyond the cataloging of clock–hours or seat time. Analysis also reveals interesting differences in professional development according to school level and district size.

Depth Characterization of Shallow Aquifers with Seismic Reflection, Part II—Prestack Depth Migration and Field Examples

Abstract: It is common in shallow seismic studies for the compressional-wave velocity in unconsolidated sediments to increase by a factor of four or more at the transition from dry or partial water saturation to full saturation. Under these conditions, conventional NMO velocity analysis fails and leads to large depth and layer thickness estimates if the Dix equation is assumed valid. Prestack depth migration (PSDM) is a means of improving image accuracy. A comparison of PSDM with conventional NMO processing for three field examples from differing hydrogeologic environments illustrates that PSDM can significantly improve image quality and accuracy.