33 research outputs found
Indigenous technology as a basis for science and technology education in junior secondary schools : a Sierra Leonean case study
No full textThis study investigates two issues: a) the usefulness of indigenous technology as an approach for teaching science and technology to junior pupils of secondary schools in Sierra Leone. b) the factors which influence its implementation. In order to carry out this investigation, the author developed a fifteen lesson module on energy, using the `coalpot', a significant indigenous technology device as centre-piece. The module was tried out in three schools in Sierra Leone, using a total of 224 pupils. Other members of the sample were experimental teachers (who taught the module) and non-experimental (who only evaluated it) and science educators. Using the triangulation method, data were collected by achievement tests, questionnaires, structured and unstructured observations and informal discussions. The results were statistically analyzed using the SPSS/PC and Minitab Computer packages. It emerged from the findings that indigenous technology is a useful approach for teaching science to junior secondary school pupils, irrespective of the problems encountered. The post-achievement test results show that on the whole, the module had a positive effect on pupils' learning. The study also shows that indigenous technology has the potential to generate pupils' interest and improve their attitudes towards science. The factors which can become barriers to the implementation of an innovation like this one, were identified and shown to be teacher- and school-related. It is recommended among other things that science education researchers, teacher trainers, curriculum developers and teachers collaborate to develop and document instructional materials based on indigenous technology. That indigenous technology be incorporated into teacher training methodology courses so that trainee teachers will have a longer period to become familiar with both the content and the teaching strategies that may be used.</p
Promoting Student Success in the Flipped Online Classroom: Learning and Accountability Through Homework Strategies
No full textAs online and hybrid classes have become increasingly more prevalent in higher education, the flipped classroom structure has emerged as a viable, evidence-based, option for healthcare programs. In a flipped classroom, students view pre-recorded video lectures and complete reading assignments before class, and synchronous class time can then be used for active learning activities. Class sessions offer opportunities for group work, review of complex content, and access to instructor assistance with assignments. To effectively implement a flipped classroom approach, students must prepare prior to class time. One method for encouraging student accountability is to assign preparatory homework. This experimental study compared two types of accountability homework on measures of achievement, satisfaction, ease of use, and perceived learning from two types of assignments: concept maps or question-and-answer homework. Study participants included 46 first year occupational therapy students attending an online foundational occupational therapy course. Treatment included weekly completion of either a concept map or a set of three question-and-answer homework assignments over a period of three weeks. Findings suggested that accountability homework assignments of either type were helpful in promoting achievement. Results further revealed that satisfaction and perceived learning were greater in the concept map group as compared to the question-and-answer group. It is recommended that occupational therapy and other allied health instructors use accountability homework to reinforce student learning in the flipped classroom. The use of concept map assignments in particular has the potential to improve schema acquisition, critical thinking, and deep learning, which in turn can support educational success
Disparities Between Reported and Actual Study Habits and Perceptions Among First Year Occupational Therapy Graduate Students
No full textStudying for exams forms a significant part of the occupational therapy graduate school experience. While successful completion of exams is a central focus for students, little time is devoted to explicitly teaching new graduate students how to most effectively study. Instead, when they enter their occupational therapy programs, students experience a steep learning curve, and often rely on previous habits or trial and error to discover the most efficacious study strategies. The purpose of this study was to examine the study behaviors, habits, and beliefs of new graduate students to gain insight into the prevalence of use of various study strategies. Further, the study investigated the use of active study strategies and self-regulated learning approaches connected to studying. First year occupational therapy students (n = 64) completed intake and exit questionnaires, which were distributed at the start and end of their first semester in the program. The surveys focused on study plans, beliefs, and actions. Findings suggested that students intended to use more study strategies than they actually used. Results also indicated that students relied more on passive than active study strategies. Although passive study strategies were prevalent, participants believed in the efficacy of active study strategies, indicating a disconnect between intention and behavior. Explicit instruction in active study strategies may be beneficial to students so that they can more effectively use approaches they, and the evidence base, believe to be most effective
Potential Hydrogen Export Port in Río Negro: A Multi-Criteria Analysis on the Optimal Location for a Potential Hydrogen Export Port in the Province of Río Negro, Argentina
No full textOver the last years, the urge to reduce the world’s air pollutants is rapidly growing. New possibilities in order to replace fossil fuels have been explored and one of them is the usage of green hydrogen. The Argentinian, North Patagonian, province of Río Negro, has a great potential to generate green hydrogen on a large scale, due to the available natural resources. Therefore, the province is ambitious to contribute in the developing worldwide sustainable energy market by producing and exporting green hydrogen. Argentina is located at a large distance from the expected green hydrogen sales market in Europe and Asia. In order to reach competitiveness with respect to other future hydrogen ports, the use of a Free-Trade Zone (FTZ) is considered. This is a delimited territory within a country in which tax benefits can be enjoyed. The Province of Río Negro is considering three different locations for a potential green hydrogen export port: - Punta Colorada Muelle, is an old iron ore export port that is out of operation since 2016. It is located within a FTZ. The deteriorated dry bulk jetty could potentially be reused by accommodating the liquid bulk loading infrastructure. - Punta Colorada South, is a location roughly one kilometre south of old iron ore export port and is also located within a FTZ. - Puerto Lobos, is located on the border of the provinces of Río Negro and Chubut. It has potentially favourable bathymetric and hydrodynamic characteristics. The following main research question is formed:”Which location between Punta Colorada Muelle, Punta Colorada South and Puerto Lobos is the most suitable for a potential hydrogen export port in Río Negro?”A conceptual qualitative Multi-Criteria Analysis is executed to compare the locations. In order to complete this analysis, firstly the hydrogen export port requirements and criteria are defined. Subsequently, primary and secondary data is collected. The primary data consists out of fieldwork surveys, including a topographic analysis, a hydraulic analysis and a structural analysis. The structural analysis is completed solely on the existing jetty at Punta Colorada Muelle, in order to create an understanding of the current state of the jetty. Furthermore, interviews are conducted with the director of the Maritime and Fluvial Research Center (CIEMF), the executive director of investment agency of the Government of Río Negro, and an ex-employee of the previous mining company at Punta Colorada Muelle. Secondary data on all locations is gathered through literature studies and presented documents from stakeholders. With data from the field survey several detailed maps are made. A bathymetry map shows the sea bed profile from Punta Colorada Muelle until Punta Pórfido. A topographic map shows the ground level elevation for Punta Colorada Muelle. An interactive map of the jetty is made which contains all the gathered photographs of the structural components and indicates their level of corrosiveness. Next to that the stakeholders are displayed in a power-interest diagram.Due to the limited information and the quality of the information that was gathered at Puerto Lobos no fair comparison between the locations can be made. Both locations at Punta Colorada have potential to construct a green hydrogen export port. The jetty at Punta Colorada Muelle has the potential to be used in the short-term if it is restored. Punta Colorada South has the advantage that potential future port operations will not depend on dated infrastructure. Next tot that there is no interference with the iron ore port authority. Puerto Lobos has the disadvantage that there is no FTZ and that is situated adjecent to a marine protected area. To properly compare all three locations, bathymetric and aerial surveys that were completed at the Punta Colorada locations will need to be repeated at Puerto Lobos. To create a more definitive conclusion on any location, additional research like a CPT and an in depth analysis of the structural capacity of the jetty is required. From the bathymetric surveys another potentially interesting location was found in Punto Pórfido. It is recommended this location is researched further.Three alternative scenarios for phasing the port construction and operation are presented. These scenarios differ in permanent, temporary or no use of the current jetty at all.CIE4061-09 Multidisciplinary ProjectCivil Engineerin
Analysis of transition skills as a result of direct instruction in transition: a study of eighth grade students with specific learning disabilities at Hudson Middle School
No full textIncludes bibliographical references
“The team members were very tolerant”: social interactional ideologies and power in an intercultural context
No full text<p>Speakers may resort to different inferences and expectations in intercultural encounters. These expectations are influenced by speakers' socialization processes in speech communities and networks, as well as by the local interactional demands and power dynamics in the communicative situation. While interactional sociolinguistic studies have unveiled intercultural mismatches in how contextualization asymmetries operate in the here-and-now of interaction, less attention has been given to speakers' normative expectations of good and bad social encounters, as reflected in retrospective accounts of interactional experiences. This article uses critical discursive psychology to examine social interactional ideologies, as German and Chinese students (home and exchange students, respectively) reflect on their experiences in a virtual intercultural game. As an analytical tool, we use the notion of "interpretative repertoires,"i.e., culturally shared ways to construct generally recognizable versions of objects. Our analysis of reflection reports written by the game players shows repertoires addressing ideal behaviors and ideal group features, which tend to place the German students in a more favorable position than the Chinese students. We discuss how local and historical power dynamics are blended in the repertoires and point to the need to critically engage with the social interactional ideologies that exist - but often go unnoticed - in intercultural settings. 2025 the author(s).</p>Peer reviewe
Expression of the mRNA stability regulator Tristetraprolin is required for lactation maintenance in the mouse mammary gland
No full textTristetraprolin (TTP), an mRNA-binding protein that negatively controls levels of inflammatory factors, is highly expressed in the lactating mouse mammary gland. To determine the biological relevance of this expression profile, we developed bi-transgenic mice in which this protein is specifically down-regulated in the secretory mammary epithelium in the secretory mammary epithelium during lactation. Our data show that TTP conditional KO mice produced underweight litters, possibly due to massive mammary cell death induced during lactation without the requirement of additional stimuli. This effect was linked to overexpression of inflammatory cytokines, activation of STAT3 and down-regulation of AKT phosphorylation. Importantly, blocking TNFa activity in the lactating conditional TTP KO mice inhibited cell death and similar effects were observed when this treatment was applied to wild-type animals during 48 h after weaning. Therefore, our results demonstrate that during lactation TTP wards off early involution by preventing the increase of local inflammatory factors. In addition, our data reveal the relevance of locally secreted TNFa for triggering programmed cell death after weaning.Fil: Goddio, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Gattelli, Albana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Tocci, Johanna Melisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Perez Cuervo, Lourdes. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Stedile, Micaela Nadia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; ArgentinaFil: Stumpo, Deborah. National Institute Of Environmental Health Science; Estados UnidosFil: Hynes, Nancy. Friedrich Miescher Institute For Biomedical Research; SuizaFil: Blackshear, Perry. National Institute Of Environmental Health Science; Estados UnidosFil: Meiss, Roberto P.. Academia Nacional de Medicina de Buenos Aires; ArgentinaFil: Kordon, Edith Claudia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; Argentin
Random unconditional convergence of vector-valued Dirichlet series
No full textWe study random unconditionality of Dirichlet series in vector-valued Hardy spaces Hp(X). It is shown that a Banach space X has type 2 (respectively, cotype 2) if and only if for every choice (xn)n⊂X it follows that (xnn−s)n is random unconditionally convergent (respectively, divergent) in H2(X). The analogous question on Hp(X) spaces for p≠2 is also explored. We also provide explicit examples exhibiting the differences between the unconditionality of (xnn−s)n in Hp(X) and that of (xnzn)n in Hp(X). © 2019 Elsevier Inc.The first three authors were partially supported by CONICET -PIP 11220130100329CO and ANPCyT PICT 2015-2299 . The second and third authors are also supported by a CONICET doctoral fellowship. Fourth author gratefully acknowledges support of Spanish Ministerio de Economía, Industria y Competitividad through grants MTM2016-76808-P , MTM2016-75196-P , and the “ Severo Ochoa Programme for Centres of Excellence in R&D ” ( SEV-2015-0554 ).Peer reviewe
Effects of urbanization on the nutritional physiology and gut microbiome of house sparrows (Passer domesticus)
No full textabstract: The natural habitat as well as the food abundance and food sources of avian species is changing due to urbanization, and such anthropocentric actions could lead to devastating impacts on bird populations. As changes in distribution and nutrition are thought to be related to the gut microbiome, the goal of this study was to determine the relationship between nutritional markers, including body mass, gizzard mass, triglycerides, free glycerol and glycogen, and the gut microbiome in urban and rural house sparrows (Passer domesticus), to understand physiological differences between urban and rural house sparrows. We hypothesized that increased access to human refuse, through urbanization, may significantly alter the gut microbiome and thus, the nutritional physiology-the effects of foods on metabolism-of urban birds. Fecal samples were collected from rural (n=13) and urban (n=7) birds to characterize the gut microbiome and plasma samples were collected to measure nutritional markers using commercially available kits. Following euthanasia, liver samples were collected to measure triglycerides, free glycerol and glycogen. While there were no significant differences in circulating triglycerides or free glycerol between populations, urban birds had significantly greater blood glucose (p=0.046) compared to rural birds, when normalized to body mass. Additionally, rural birds had significantly more plasma uric acid (p=0.016) and liver free glycerol (p=0.044). Higher blood glucose suggests greater accessibility to carbohydrates in an urban setting or higher rates of gluconeogenesis. Uric acid is a byproduct of purine catabolism and a potent antioxidant. Thus, higher uric acid suggests that rural birds may utilize more protein for energy. Finally, higher liver free glycerol in rural birds suggests they metabolize more fat but could also indicate that urban birds have greater glycerol gluconeogenesis, which may consume free glycerol resulting in higher glucose concentrations. However, the current study does not provide evidence for this as there were no significant differences in the gluconeogenic enzyme PEPCK-C levels between urban and rural house sparrows (p= 0.165). While triglyceride, glucose, and uric acid levels differed between urban and rural birds, there were additionally no significant differences in the gut microbiome, indicating that although nutritional physiology can be affected by distribution and varying food availability and sources, differences in the gut microbiome are evident at the phyla level
Why Living with Pulmonary Arterial Hypertension Requires a Holistic Approach: A Patient and Clinician Perspective
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