Session A-1: BCA Method, Focusing on Mole Ratios in Stoichiometry

Traditionally stoichiometry is done using dimensional analysis. Although effective, it is confusing, messy, and does not focus on mole ratios. On the other hand, the BCA method (Before-Change-After), is clear, clean, and highlights the mole ratios in a chemical reaction. Participants will collect mass data in an experiment and learn how to use a BCA table. Teachers will bring the BCA method back to their classrooms and provide an extremely useful tool for the next generation of chemistry savvy students

Afterschool Programs in Your Community, Funding and Collaboration

An estimated eight million school age children between the ages of 5 and 14, go home to an empty house. Statistics reveal that most juvenile crime is committed between the hours of 2:00 pm and 8:00 pm, with the crime rate tripling in the rst hour after school is out

The selection of an appropriate count data model for modelling health insurance and health care demand: Case of Indonesia

This is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.We apply several estimators to Indonesian household data to estimate the relationship between health insurance and the number of outpatient visits to public and private providers. Once endogeneity of insurance is taken into account, there is a 63 percent increase in the average number of public visits by the beneficiaries of mandatory insurance for civil servants. Individuals' decisions to make first contact with private providers is affected by private insurance membership. However, insurance status does not make any difference for the number of future outpatient visits

The Perfect Mindstorm: 4-H Robotics in Afterschool Settings

As the 4-H Science, Engineering and Technology (SET) Mission Mandate unfolds, robotics provides an opportunity to involve youth in SET activities. Utah 4-H utilized Lego Mindstorms Robotics kits to teach youth about robotics. Evaluations demonstrated that robots increase youth’s interest in science, engineering and technology

Platelet aggregation induced by polystyrene and platinum nanoparticles is dependent on surface area

Nanoparticles are key components underlying recent technological advances in various industrial and medical fields, and thus understanding their mode of interaction with biological systems is essential. However, while several nanoparticle systems have been shown to interact with blood platelets, many questions remain concerning the mechanisms of platelet activation and the role that the physicochemical properties of nanoparticles play in inducing platelet aggregation. Here, using negatively charged polystyrene nanoparticles with sizes of 25, 50, 119, 151, 201 nm and negatively charged platinum nanoparticles with sizes of 7 and 73 nm, we show that it is not the size of the nanoparticles but rather the nanoparticle surface area that is critical in mediating the effects on platelet activation. The nanoparticles stimulate platelet aggregation through passive (agglutination) and activation of integrin αIIbβ3 through a pathway regulated by Src and Syk tyrosine kinase

H11Implementing physiotherapy Huntington's disease guidelines in clinical practice: a global survey

Background Clinical practice guidelines are often not optimally translated to clinical care. Following the publication of the Huntington’s disease (HD) physiotherapy clinical practice guidelines in 2020, the European Huntington’s Disease Network Physiotherapy Working Group (EHDN PWG) identified a need to explore perceived facilitators and barriers to their implementation. The aims of this study were to explore physiotherapists’ awareness of and perceived barriers and facilitators to implementation of the 2020 guidelines. Methods An observational study was carried out using an online survey. Participants were physiotherapists recruited via the EHDN and physiotherapy associations in the United Kingdom, Australia, and United States of America. The survey gathered data on agreement and disagreement with statements of barriers and facilitators to implementation of each of six recommendations in the guidelines using Likert scales. Results There were 32 respondents: 18 from Europe, 7 from Australia, 5 from the USA, 1 from Africa (1 missing data). The majority were aware of the guidelines (69%), with 75% working with clients with HD < 40% of their time. Key findings were that HD specific attributes (physical, behavioural and low motivation) were perceived to be barriers to implementation of recommendations ( ≥ 70% agreement). Support from colleagues (81-91% agreement), an individualised plan (72-88% agreement) and physiotherapists’ expertise in HD (81-91% agreement) were found to be facilitators of implementation in all six of the recommendations. Conclusions This study is the first to explore implementation of guidelines in physiotherapy clinical practice. Resources from PWG to support physiotherapists need to focus on ways to implement recommendations specifically related to management of physical, behavioural and motivational problems associated with HD. This would enhance physiotherapists’ expertise, a facilitator to implementation of clinical practice guidelines

Predicting proton-nucleus total reaction cross sections up to 300 MeV using a simple functional form

Total reaction cross sections are predicted for proton scattering from various nuclei. A simple functional form has been used that reproduces the total reaction cross sections for the scattering of protons from (15) nuclei spanning the mass range from ${}^9$Be to ${}^{238}$U and for proton energies 10 to 300 MeV

Handedness of complex PT-symmetric potential barriers

Generally, when imaginary part of an optical potential is non-symmetric the reflectivity, $R(E)$, shows left/right handedness, further if it is not negative-definite the reflection and transmission, $T(E)$, coefficients become anomalous in some energy intervals and absorption is indefinite ($\pm$). We find that the complex PT-symmetric potentials could be exceptional in this regard. They may act effectively like an absorptive potential for any incident energy provided the particle enters from the preferred (absorptive) side.Comment: 9 pages and 4 figure