New Intersections for Student Engagement in Libraries: A Qualitative Exploration of Collaborative Learning with Multimedia Technologies

Objective – The purpose of this study was to explore new ways librarians can provide meaningful learning experiences for students beyond the traditional classroom assignment and the one-hour library instruction session. Methods – The study was done within a qualitative framework using participative, interpretive, and personal experience methods. The research team consisted of two librarians and a graduate student. Data collected included transcripts of audio-recorded team meetings and interviews, field notes, and a post-project survey, where students described their experiences negotiating the conceptual and technical processes of authoring a multimedia story. The instructional layer was built upon a constructivist approach allowing for a collaborative learning setting to foster learner control and self-efficacy. Results – Findings illustrate the benefits of collaborative approaches for enhancing the learning experiences of students in the library, in this case with multimedia. The data also suggest promising new ways for librarians to facilitate learning and to engage students in the library. Conclusion – Through a multimedia project that involves both librarian-guided exploration and collaborative learning processes, libraries can offer students formal and structured opportunities to explore their own interests or underlying curiosities beyond the classroom assignment and the one-hour library instruction session

Temporal response of the tiger salamander (Ambystoma tigrinum) to 3,000 years of climatic variation

BACKGROUND: Amphibians are sensitive indicators of environmental conditions and show measurable responses, such as changes in phenology, abundance and range limits to local changes in precipitation and temperature regimes. Amphibians offer unique opportunities to study the important ecological and evolutionary implications of responses in life history characteristics to climatic change. We analyzed a late-Holocene fossil record of the Tiger Salamander (Ambystoma tigrinum) for evidence of population-level changes in body size and paedomorphosis to climatic change over the last 3000 years. RESULTS: We found a significant difference in body size index between paedomorphic and metamorphic individuals during the time interval dominated by the Medieval Warm Period. There is a consistent ratio of paedomorphic to metamorphic specimens through the entire 3000 years, demonstrating that not all life history characteristics of the population were significantly altered by changes in climate on this timescale. CONCLUSION: The fossil record of Ambystoma tigrinum we used spans an ecologically relevant timescale appropriate for understanding population and community response to projected climatic change. The population-level responses we documented are concordant with expectations based on modern environmental studies, and yield insight into population-level patterns across hundreds of generations, especially the independence of different life history characteristics. These conclusions lead us to offer general predictions about the future response of this species based on likely scenarios of climatic warming in the Rocky Mountain region

A Tale of Two Mommies: (Re)Storying Family of Origin Narratives

This study examined co-mother family of origin stories. Origin stories, representing the formation of a family, are culturally understood within a master narrative of heterosexual love and biological childbearing. Beginnings of co-mother families rupture this dominant, gendered, boy-meets-girl script. Investigating whether or not co-mother stories reify the normative master narrative or if instead their narrations resist and/or possibly transform conventional understandings, analysis identified three co-mother origin story themes: Becoming a Family (1) as Normal, (2) as Negotiation, and (3) as Normalization. Themes differ in terms of depiction of co-mother family formation as congruent with current norms, as something that needs to be made to seem normal (i.e., in need of normalization), or as something between normal and normalization—to be negotiated internally within the couple. Study results are discussed within a broader framework of family coming-together stories

Rapid assessment of two primary health clinics : are we ready for National Health Insurance?

BACKGROUND. Healthcare service delivery remains a challenge in most primary healthcare (PHC) facilities across South Africa (SA). In addition, the healthcare system continues to have high and rising costs, with widening gaps in quality, equity and access. The National Department of Health (NDoH) launched the National Health Insurance (NHI) pilot programme in 2012 as the solution to the current ailing health system. The NDoH’s strategy is to improve all PHC facilities to meet the standards of an ‘ideal clinic’ (IC) in order to improve access to quality health services. OBJECTIVES. To assess the challenges experienced by two NHI pilot clinics in the provision of healthcare. METHODS. A descriptive cross-sectional study was done in a province in SA, at two NHI pilot clinics. Data were collected using structured questionnaires that used the component elements of the IC model framework. Data were captured in Excel, and analysed using Stata 13 software. RESULTS. Forty-six clinical and administrative staff participated in the study. The majority (84%, n=38) of participants were female. Clinic A had not been designated as an IC. There was no statistically significant difference (p>0.05) between the two clinics in their global self-scoring regarding service provision. Human resources and medicine supply shortages were reported as challenges affecting service provision. All (100%, n=22) clinic A participants reported not having a doctor, while 82% (n=18) reported not having a pharmacist. Clinic B had IC status, and all the participants (100%, n=24) confirmed the availability of the doctor, while 88% (n=21) reported the availability of a pharmacist. The clinics reported a range of 5 - 180 minutes of patient waiting time after triaging; however, there was no statistically significant difference found in the patient waiting times between the two clinics (p=0.96). CONCLUSION. Both clinics are NHI pilot clinics, yet there are reported disparities regarding the equity of resources, which could affect effective service provision. Both clinics should have been operating at a similar standard under the NHI pilot programme.http://www.shsjournal.org/index.php/shsjhj2021School of Health Systems and Public Health (SHSPH

APPLYING MULTIPLE IMPUTATION FOR EXTERNAL CALIBRATION TO PROPENSTY SCORE ANALYSIS

Although covariate measurement error is likely the norm rather than the exception, methods for handling covariate measurement error in propensity score methods have not been widely investigated. We consider a multiple imputation-based approach that uses an external calibration sample with information on the true and mismeasured covariates, Multiple Imputation for External Calibration (MI-EC), to correct for the measurement error, and investigate its performance using simulation studies. As expected, using the covariate measured with error leads to bias in the treatment effect estimate. In contrast, the MI-EC method can eliminate almost all the bias. We confirm that the outcome must be used in the imputation process to obtain good results, a finding related to the idea of congenial imputation and analysis in the broader multiple imputation literature. We illustrate the MI-EC approach using a motivating example estimating the effects of living in a disadvantaged neighborhood on mental health and substance use outcomes among adolescents. These results show that estimating the propensity score using covariates measured with error leads to biased estimates of treatment effects, but when a calibration data set is available, MI-EC can be used to help correct for such bias

Assessing Bias in Population Size Estimates Among Hidden Populations When Using the Service Multiplier Method Combined With Respondent-Driven Sampling Surveys: Survey Study.

BACKGROUND: Population size estimates (PSEs) for hidden populations at increased risk of HIV, including female sex workers (FSWs), are important to inform public health policy and resource allocation. The service multiplier method (SMM) is commonly used to estimate the sizes of hidden populations. We used this method to obtain PSEs for FSWs at 9 sites in Zimbabwe and explored methods for assessing potential biases that could arise in using this approach. OBJECTIVE: This study aimed to guide the assessment of biases that arise when estimating the population sizes of hidden populations using the SMM combined with respondent-driven sampling (RDS) surveys. METHODS: We conducted RDS surveys at 9 sites in late 2013, where the Sisters with a Voice program (the program), which collects program visit data of FSWs, was also present. Using the SMM, we obtained PSEs for FSWs at each site by dividing the number of FSWs who attended the program, based on program records, by the RDS-II weighted proportion of FSWs who reported attending this program in the previous 6 months in the RDS surveys. Both the RDS weighting and SMM make a number of assumptions, potentially leading to biases if the assumptions are not met. To test these assumptions, we used convergence and bottleneck plots to assess seed dependence of RDS-II proportion estimates, chi-square tests to assess if there was an association between the characteristics of FSWs and their knowledge of program existence, and logistic regression to compare the characteristics of FSWs attending the program with those recruited to RDS surveys. RESULTS: The PSEs ranged from 194 (95% CI 62-325) to 805 (95% CI 456-1142) across 9 sites from May to November 2013. The 95% CIs for the majority of sites were wide. In some sites, the RDS-II proportion of women who reported program use in the RDS surveys may have been influenced by the characteristics of selected seeds, and we also observed bottlenecks in some sites. There was no evidence of association between characteristics of FSWs and knowledge of program existence, and in the majority of sites, there was no evidence that the characteristics of the populations differed between RDS and program data. CONCLUSIONS: We used a series of rigorous methods to explore potential biases in our PSEs. We were able to identify the biases and their potential direction, but we could not determine the ultimate direction of these biases in our PSEs. We have evidence that the PSEs in most sites may be biased and a suggestion that the bias is toward underestimation, and this should be considered if the PSEs are to be used. These tests for bias should be included when undertaking population size estimation using the SMM combined with RDS surveys

Adult acclimation to combined temperature and pH stressors significantly enhances reproductive outcomes compared to short-term exposures

1.This study examined the effects of long-term culture under altered conditions on the Antarctic sea urchin, Sterechinus neumayeri. 2.Sterechinus neumayeri was cultured under the combined environmental stressors of lowered pH (−0·3 and −0·5 pH units) and increased temperature (+2 °C) for 2 years. This time-scale covered two full reproductive cycles in this species and analyses included studies on both adult metabolism and larval development. 3.Adults took at least 6–8 months to acclimate to the altered conditions, but beyond this, there was no detectable effect of temperature or pH. 4.Animals were spawned after 6 and 17 months exposure to altered conditions, with markedly different outcomes. At 6 months, the percentage hatching and larval survival rates were greatest in the animals kept at 0 °C under current pH conditions, whilst those under lowered pH and +2 °C performed significantly less well. After 17 months, performance was not significantly different across treatments, including controls. However, under the altered conditions urchins produced larger eggs compared with control animals. 5.These data show that under long-term culture adult S. neumayeri appear to acclimate their metabolic and reproductive physiology to the combined stressors of altered pH and increased temperature, with relatively little measureable effect. They also emphasize the importance of long-term studies in evaluating effects of altered pH, particularly in slow developing marine species with long gonad maturation times, as the effects of altered conditions cannot be accurately evaluated unless gonads have fully matured under the new conditions