A Phenomenological Expression for Deuteron Electromagnetic Form Factors Based on Perturbative QCD Predictions

For deuteron electromagnetic form factors,perturbative QCD(pQCD) predicts that $G^{+}_{00}$ becomes the dominate helicity amplitude and that $G^{+}_{+0}$ and $G^{+}_{+-}$ are suppressed by factors $\Lambda_{\rm QCD}/Q$ and $\Lambda_{\rm QCD}^2/Q^2$ at large $Q^2$,respectively. We try to discuss the higher order corrections beyond the pQCD asymptotic predictions by interpolating an analytical form to the intermediate energy region. From fitting the data,our results show that the helicity-zero to zero matrix element $G^{+}_{00}$ dominates the gross structure function $A(Q^2)$ in both of the large and intermediate energy regions; it is a good approximation for $G^{+}_{+-}$ to ignore the higher order contributions and the higher order corrections to $G^{+}_{+0}$ should be taken into account due to sizeable contributions in the intermediate energy region.Comment: 9 pages,3 figure

Establishment of persistent infection with foot-and-mouth disease virus in BHK-21 cells

<p>Abstract</p> <p>Background</p> <p>Foot-and-mouth disease virus (FMDV) is able to cause persistent infection in ruminants besides acute infection and disease. Since the mechanisms of viral persistence and the determining factors are still unknown, <it>in vitro </it>systems help explore and reveal mechanisms of persistence <it>in vivo </it>by providing useful models for the study of RNA genome mutations and evolution. Ammonium chloride, a lysosomotropic agent that raises intralysosomal pH, reduces the yield of FMDV during infection of BHK-21 cells.</p> <p>Results</p> <p>The persistent infection with FMDV serotype O in BHK-21 cells was selected and established readily after treatment of ammonium chloride that acts primarily on the cells. Intact virions were observed located inside the endosomes. Viral genome RNAs and specific proteins were detected in the persistent cells to validate the establishment of viral persistence. Infection of the persistent viruses could not form plaques in host cells but virulence was enhanced. Basing on analysis and comparison of cDNA sequences of resident viruses and wild type viruses, 15 amine acid mutations were found, all of which were located in nonstructural proteins rather than in structural proteins.</p> <p>Conclusions</p> <p>Therefore, persistent infection of cell cultures with FMDV is successfully established with some distinctive features. It would be worthwhile to further investigate the mechanisms of viral persistence.</p

Creative Geometry Games

The geometry game presented in this article was inspired by Bright and Harvey\u27s (1988) Learning and fun with geometry games. In their article, Bright and Harvey (1988) propose three interactive games: Polyhedron Rummy, Polygon Rummy and That are Stretching it. Polygon Rummy is a game pertaining to plane geometry where the instructional objective is to construct a figure using lines and angles, whereas the goal of polyhedron rummy is to construct a solid using faces and angles. Although Bright and Harvey focused on constructing shapes, they also suggested presenting pre-constructed shapes to students, allowing them to classify and identify them (Bright & Harvey, 1988). Our activity does just this

Using Hands-on Experiences Including Various Forms of ARTS to Increase Ninth-Grade Female Students’ Interest in STEM

Aim: The research aims to increase interest and a greater awareness of STEM fields among female minority students by providing hands-on STEM-infused workshops incorporating the arts as a central theme. Methodology: The research methodology involved conducting workshops for thirty-seven female students, primarily from low socioeconomic backgrounds, who attended fifteen-hour-long STEM-infused hands-on workshops presented by university professors in the College of Education and the College of Arts and Sciences. Findings: The study’s results revealed that the 15-week STEM workshops positively impacted the female students’ attitudes toward STEM. In addition, the post-survey results showed a significant increase in their interest in Science, Technology, Engineering, and Mathematics. The data from the results is a promising finding, as it indicates that targeted interventions can effectively increase STEM interest among young female students from underrepresented backgrounds. Implications/Novel Contribution: The implications of this research are significant as it addresses the underrepresentation of female minority students in STEM. In addition, the project enabled students to participate in STEM education inclusively and innovatively. Our aspiration is that through this initiative, students will be able to contribute to promoting diversity and inclusivity within the STEM fields. In addition, the results of this research may provide insights into practical strategies for increasing diversity and inclusivity in STEM fields

Using Hands-on Experiences including Various Forms of ARTS to Increase Ninth-Grade Female Students’ Interest in STEM – Final Results

Due to the ever-growing number of employment opportunities in the science technology engineering and math fields increasing emphasis is placed on STEM education at all levels This paper reports on research focused on increasing STEM interest and awareness in ninth- grade minority female students primarily from a low socioeconomic background Thirty-seven female students participated in this research study They attended fifteen hour-long sessions of STEM-infused hands-on workshops presented by university professors in the College of Education and the College of Arts and Sciences The workshops took place during school hours adding to their regular curriculum The school does not currently have an arts program although the founder of the school is a music artist Therefore the workshops incorporated the arts as the central theme while the lessons were delivered in biology chemistry engineering and mathematics The study is motivated by the need to close the achievement gap and improve the representation of women and minorities in STEM fields Data were collected through surveys assessments and interviews and analyzed using quantitative and qualitative methods The significance of the study lies in the potential to inspire underserved females to enter the STEM field

Thermodynamic Cycle Analysis and Experimental Investigate on a Two-stage Vapor Injection Low Temperature Air Source Heat Pump with a Variable Displacement Ratio Rotary Compressor

Two-stage vapor injection compression cycle with flash tank was thermodynamically analyzed, the results showed that there existed the optimum theoretical displacement ratio of high stage to low stage corresponding to the maximum coefficient of performance(COP), the optimum displacement ratio and the volumetric heating capacity decreased with evaporation temperature decreasing. An optimum theoretical displacement ratio correlation for R290, R32 and R410A was given. A new type two-stage vapor injection low temperature air source heat pump (ASHP) was designed, which had a variable speed triple-cylinder rotary compressor with two cylinders in low stage and one cylinder in high stage. The experimental results of the new type ASHP showed that the heating capacity under 20℃/-20℃(inside room /outside room) could reach the rated heating capacity under 20℃/7℃, improving 96% compared to conventional one-stage ASHP, the heating capacity under 20℃/-30℃ could reach 80% of the rated one. COP of the new type ASHP could improve 5%~10% when the heating capacity was comparable to the conventional ASHP, and the heating capacity of the new type ASHP could improve 30%~50% when COP was comparable to the conventional ASHP