Prolegomena to a Pressure-Analysis of Economic Phenomena (Metroeconomica, vol. 1, 1949, pp. 135, 139–42)

Author(s):  
R. Frisch
Keyword(s):  
Viruses ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1322
Author(s):  
Ruiming Hu ◽  
Leyi Wang ◽  
Qingyun Liu ◽  
Lin Hua ◽  
Xi Huang ◽  
...  

Pseudorabies virus (PRV) is an economically significant swine infectious agent. A PRV outbreak took place in China in 2011 with novel virulent variants. Although the association of viral genomic variability with pathogenicity is not fully confirmed, the knowledge concerning PRV genomic diversity and evolution is still limited. Here, we sequenced 54 genomes of novel PRV variants isolated in China from 2012 to 2017. Phylogenetic analysis revealed that China strains and US/Europe strains were classified into two separate genotypes. PRV strains isolated from 2012 to 2017 in China are highly related to each other and genetically close to classic China strains such as Ea, Fa, and SC. RDP analysis revealed 23 recombination events within novel PRV variants, indicating that recombination contributes significantly to the viral evolution. The selection pressure analysis indicated that most ORFs were under evolutionary constraint, and 19 amino acid residue sites in 15 ORFs were identified under positive selection. Additionally, 37 unique mutations were identified in 19 ORFs, which distinguish the novel variants from classic strains. Overall, our study suggested that novel PRV variants might evolve from classical PRV strains through point mutation and recombination mechanisms.


2015 ◽  
Vol 33 ◽  
pp. e41
Author(s):  
Ricardo Adrian Nugraha ◽  
Michael Jonatan ◽  
Pranawa Martosuwignjo ◽  
Sri Murtiwi

2012 ◽  
Vol 5 (S1) ◽  
Author(s):  
Gordon J Hendry ◽  
Danny Rafferty ◽  
Ruth Semple ◽  
Janet M Gardner-Medwin ◽  
Debbie E Turner ◽  
...  

2012 ◽  
Vol 3 (1) ◽  
pp. 61-79 ◽  
Author(s):  
V.R. Feldgun ◽  
Y.S. Karinski ◽  
I. Edri ◽  
D. Tsemakh ◽  
D.Z. Yankelevsky

2021 ◽  
Vol 11 (4) ◽  
pp. 162
Author(s):  
Boram No ◽  
Naya Choi

Factors of graphomotor skills may serve as indicators to determine a writer’s handwriting proficiency or acclimation to different writing surface textures. This study examines differences in children’s graphomotor skills based on types of writing medium and gender. Participants were 97 six-year-old Korean preschool children who had not received formal writing training prior to the study. Writing tasks were completed on a tablet screen and paper. Writing samples were analyzed using the Eye and Pen software to investigate spatial, temporal, and pressure exertion exhibited during the writing tasks. A repeated measures ANOVA revealed differences in graphomotor skills such as print size, writing speed, and writing pressure. Writing on a tablet screen decreased clarity of writing; print size and speed increased as the stylus slides across the tablet surface with relatively less friction, thereby decreasing the exertion of writing pressure. Analysis of writing differences according to gender indicated that boys generated larger print sizes than girls. Results suggest that while simple writing tasks may be feasible on the tablet screen, providing children with a larger writing medium and encouraging larger print sizes for writing practice, especially for boys, may be beneficial in the development of graphomotor skills among young learners.


Author(s):  
Karin N. Barsness ◽  
Nathan J. Anderson ◽  
Paul E. Cassidy ◽  
Holly S. Wick

For work tasks requiring hand force and repetitive motions, risk increases directly proportional to an increase in force and repetition. Data on hand force exertion is generally collected by estimation of these forces by using subjective measurements, EMG recordings, or strain gauges. The objective of this study was to evaluate the use of a pressure pad system to quantify the ergonomic risk of a repetitive forceful manufacturing task. Effects of palmar and pinch forces and pressures associated with the current and proposed new work tasks were investigated by using a Novel Pliance dynamic pressure analysis system. Use of this system allowed the researchers to validate the reduction in forces associated with the tasks. This methodology has profound implications in that no compromise between internal and external validity is necessary, and allows quantification of ergonomic issues around forces, including tasks which requiring repetition and force exertions.


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