A Delphi Study: Retention of Women in Leadership Positions in Stem Disciplines

This Delphi study explores barriers and support systems that impact women’s professional advancement in STEM disciplines. There were 20 expert panelists who committed to participate in the study and 15 panelists completed the four rounds of the study after attrition. The panelists were selected based on specific criteria including educational background, diversity within STEM disciplines, experience as a former or current female administrator who served at two-year degree offering institutions, leadership and membership within women’s advocacy organizations in STEM and related workforce education fields, and depth of knowledge and understanding of the research questions. Through the four rounds of the Delphi study, a consensus was reached among 15 panelists including nine factors supporting advancement and three factors inhibiting advancement for a total of 12 factors that were considered relevant to the research questions based on the mean score of 3.50. The following factors were identified by the panelists as relevant for supporting advancement: Support Systems, Personal Attributes, Willingness to Advance, Leadership Skills, Curiosity about New Experiences, Role Models, Opportunities for Leadership Roles, Experiences in Undergraduate and Graduate Studies, and Awareness of Institutional Environments; and those for inhibiting advancement: Conflicting Family Obligations, Lack of Compensation, and Personal Concerns. The results of the Delphi study can be used as a conceptual framework to inform administrators and researchers in higher education on the relevant factors concerning organizational climate, institutional policies, and departmental conditions that impact women’s advancement or hinder their advancement in STEM fields

Equity in Engineering Education: The Experiences of Non-Traditional Students in Introductory Engineering Courses with Peer Learning Support

This paper seeks to examine one aspect of the pilot research study entitled, “Engagement in Engineering Pathways: An Initiative to Retain Non-Traditional Students in Engineering” funded by the National Science Foundation Improving Undergraduate STEM Education grant program (Award No. 1712008). This three-year study examines the effect of the use of Peer-Led Team Learning (PLTL) on students’ academic performance, STEM experiences, and persistence in engineering programs [2]. The data collected is from May 2018- May 2020. The present study population is undergraduate engineering students at a multi-campus, federally designated Hispanic-serving, public, two-year college in the southeastern U.S. This paper will specifically address the effects of the PLTL on the student’s STEM experiences

Peer-Led-Team Learning in Introductory Engineering Courses: An Analysis of an Interventional Method of Support for Underrepresented Students at a Two-year, Hispanic-serving Public Institution

The three-year project entitled Engagement in Engineering Pathways funded by the National Science Foundation Improving Undergraduate STEM education grant explored the conditions that led to increased academic outcomes and non-cognitive factors related to persistence of nontraditional undergraduate students in engineering education. The study was conducted at a multicampus, federally-designated, Hispanic-serving, public, two-year college in the southeast United States. This paper presents one aspect of the effects of peer-led team learning (PLTL) on academic success through the inclusion of active learning modules in introductory undergraduate engineering course. The researchers found that PLTL introduced in engineering courses, to include statics and dynamics, closed a gap between majority and minority students, populations historically underrepresented in engineering. Although the study is limited to a single institution, the results support that the inclusion of active learning modules introduced through peer-led exercises are an important learning support construct known to be a factor in academic success and persistence in engineering education

Mechanics of the Ski-Snow Contact

Two outstanding questions of the ski-snow friction are considered: the deformation mode of the snow and the real contact area. The deformation of hard, well sintered snow in a short time impact has been measured with a special linear friction tester. Four types of deformations have been identified: brittle fracture of bonds, plastic deformation of ice at the contact spots, elastic and delayed elastic deformation of the snow matrix. The latter is the dominant deformation in the ski-snow contact. Based on the measured loading curves the mechanical energy dissipation of snow deformation in skiing on hard snow has been determined and found negligible compared to the thermal energy dissipation. A mechanical model consisting of ice spheres supported by rheological elements (a non-linear spring in series with a Kelvin element) is proposed to model the deformation of snow in the ski-snow contact. The model can describe the delayed elastic behaviour of snow. Coupled with the complete topographical description of the snow surface obtained from X-ray micro computer tomography measurements, the model predicts the number and area of contact spots between ski and snow. An average contact spot size of 110μm, and a relative real contact area of 0.4% has been foun

Strategies for Engagement of Non-Traditional Students in Engineering-Related Courses

Project Goals Overview Goal #1: Increase students\u27 commitment to engineering pathways. Goal #2: Increase academic performance and persistence in engineering. Goal #3: Increase persistence of Veterans in engineering pathways. Research Questions How does students\u27 participation in peer-led team learning activities in online engineering courses correlate to their a) commitment to engineering, b) engineering identity, and c) self-efficacy. How do students in peer-led team learning activities compare to students in non-PLTL groups in terms of a) academic performance and b) persistence in engineering pathways

Future Directions of Space Education

The future of space operations graduate education is reliant on industry leaders’ contributions to help forecast the needs of the industry. The aim of the current study is to build consensus on the future direction of the space industry and generate new knowledge on what the industry expects to occur in the future of space studies education. This study documents the responses of 14 industry experts who currently or previously held highly visible senior leadership positions in a company or organization within the government or the commercial space industry and have extensive experience in a variety of management and leadership roles at space-related companies. The panelists’ qualitative responses were coded by themes related to the future of work for senior leadership in the industry. The findings from the consolidated responses included 20 educational and training content areas and nine shortcomings. The Delphi technique, a group consensus building process, was used to gain insight into the panelists’ responses (Dalkey, 1972). The research contributes to the body of knowledge on workforce education that can be used to inform faculty and administration in higher education on the relevance of program and curriculum content to address the future needs of the industry

Involvement of the agmatinergic system in the depressive-like phenotype of the Crtc1 knockout mouse model of depression.

Recent studies implicate the arginine-decarboxylation product agmatine in mood regulation. Agmatine has antidepressant properties in rodent models of depression, and agmatinase (Agmat), the agmatine-degrading enzyme, is upregulated in the brains of mood disorder patients. We have previously shown that mice lacking CREB-regulated transcription coactivator 1 (CRTC1) associate behavioral and molecular depressive-like endophenotypes, as well as blunted responses to classical antidepressants. Here, the molecular basis of the behavioral phenotype of Crtc1(-/-) mice was further examined using microarray gene expression profiling that revealed an upregulation of Agmat in the cortex of Crtc1(-/-) mice. Quantitative polymerase chain reaction and western blot analyses confirmed Agmat upregulation in the Crtc1(-/-) prefrontal cortex (PFC) and hippocampus, which were further demonstrated by confocal immunofluorescence microscopy to comprise an increased number of Agmat-expressing cells, notably parvalbumin- and somatostatin-positive interneurons. Acute agmatine and ketamine treatments comparably improved the depressive-like behavior of male and female Crtc1(-/-) mice in the forced swim test, suggesting that exogenous agmatine has a rapid antidepressant effect through the compensation of agmatine deficit because of upregulated Agmat. Agmatine rapidly increased brain-derived neurotrophic factor (BDNF) levels only in the PFC of wild-type (WT) females, and decreased eukaryotic elongation factor 2 (eEF2) phosphorylation in the PFC of male and female WT mice, indicating that agmatine might be a fast-acting antidepressant with N-methyl-D-aspartate (NMDA) receptor antagonist properties. Collectively, these findings implicate Agmat in the depressive-like phenotype of Crtc1(-/-) mice, refine current understanding of the agmatinergic system in the brain and highlight its putative role in major depression

Risk factors for mosquito house entry in the Lao PDR.

BACKGROUND: Construction of the Nam Theun 2 hydroelectric project and flooding of a 450 km(2) area of mountain plateau in south-central Lao PDR resulted in the resettlement of 6,300 people to newly built homes. We examined whether new houses would have altered risk of house entry by mosquitoes compared with traditional homes built from poorer construction materials. METHODOLOGY/PRINCIPAL FINDINGS: Surveys were carried out in the Nam Theun 2 resettlement area and a nearby traditional rice farming area in 2010. Mosquitoes were sampled in bedrooms using CDC light traps in 96 resettlement houses and 96 traditional houses and potential risk factors for mosquito house entry were recorded. Risk of mosquito house entry was more than twice as high in traditional bamboo houses compared with those newly constructed from wood (Putative Japanese Encephalitis (JE) vector incidence rate ratio (IRR) = 2.26, 95% CI 1.38-3.70, P = 0.001; Anopheline IRR = 2.35, 95% CI: 1.30-4.23, P = 0.005). Anophelines were more common in homes with cattle compared against those without (IRR = 2.32, 95% CI: 1.29-4.17, P = 0.005).Wood smoke from cooking fires located under the house or indoors was found to be protective against house entry by both groups of mosquito, compared with cooking in a separate room beside the house (Putative JE vector IRR = 0.43, 95% CI: 0.26-0.73, P = 0.002; Anopheline IRR = 0.22, 95% CI: 0.10-0.51, P<0.001). CONCLUSIONS/SIGNIFICANCE: Construction of modern wooden homes should help reduce human-mosquito contact in the Lao PDR. Reduced mosquito contact rates could lead to reduced transmission of diseases such as JE and malaria. Cattle ownership was associated with increased anopheline house entry, so zooprophylaxis for malaria control is not recommended in this area. Whilst wood smoke was protective against putative JE vector and anopheline house entry we do not recommend indoor cooking since smoke inhalation can enhance respiratory disease

The value of PET, CT and in-line PET/CT in patients with gastrointestinal stromal tumours: long-term outcome of treatment with imatinib mesylate

Purpose: Gastrointestinal stromal tumours (GIST) are mesenchymal neoplasms of the gastrointestinal tract that are unresponsive to standard sarcoma chemotherapy. Imaging of GIST patients is done with structural and functional methods such as contrast-enhanced helical computed tomography (ceCT) and positron emission tomography (PET) with 18F-fluorodeoxyglucose (FDG). The aim of this study was to compare the prognostic power of PET and ceCT and to evaluate the clinical role of PET/CT imaging. Methods: All patients with GIST undergoing PET or PET/CT examinations were prospectively included in this study, and the median overall survival, time to progression and treatment duration were documented. The prognostic significance of PET and ceCT criteria of treatment response was assessed and PET/CT was compared with PET and ceCT imaging. Data for 34 patients (19 male, 15 female, 21-76 years) undergoing PET or PET/CT for staging or restaging were analysed. Results: In 28 patients, PET/CT and ceCT were available after introduction of treatment with the tyrosine kinase inhibitor imatinib mesylate (Gleevec; Novartis, Basel, Switzerland). Patients without FDG uptake after the start of treatment had a better prognosis than patients with residual activity. In contrast, ceCT criteria provided insufficient prognostic power. However, more lesions were found on ceCT images than on PET images, and FDG uptake was sometimes very variable. PET/CT delineated active lesions better than did the combination of PET and ceCT imaging. Conclusion: Both PET and PET/CT provide important prognostic information and have an impact on clinical decision-making in GIST patients. PET/CT precisely delineates lesions and thus allows for the correct planning of surgical intervention

Thermal expansion, heat capacity and magnetostriction of RAl3_3 (R = Tm, Yb, Lu) single crystals

We present thermal expansion and longitudinal magnetostriction data for cubic RAl3 (R = Tm, Yb, Lu) single crystals. The thermal expansion coefficient for YbAl3 is consistent with an intermediate valence of the Yb ion, whereas the data for TmAl3 show crystal electric field contributions and have strong magnetic field dependencies. de Haas-van Alphen-like oscillations were observed in the magnetostriction data of YbAl3 and LuAl3, several new extreme orbits were measured and their effective masses were estimated. Zero and 140 kOe specific heat data taken on both LuAl3 and TmAl3 for T < 200 K allow for the determination of a CEF splitting scheme for TmAl3