Psychological, Social Environmental, and Physical Environmental Variables in Explaining Physical Activity in Korean Older Adults

The current study investigated the direct and indirect paths of psychological, social environmental, and physical environmental variables in explaining physical activity among Korean older adults. A total of 401 adults aged 65 years old or older (Mage = 75.17 years, SD = ±7.24) were recruited from the Nowon district of northern Seoul. Standardized scales were used to measure physical activity and its related social ecological variables. The results indicated that physical activity was significantly correlated with self efficacy, perceived benefits, perceived barriers, family support, friend support, availability of facilities, and quality of facilities. All of psychological, social environmental, and physical environmental variables had a significant direct path to explain physical activity. In addition, self-efficacy and perceived benefits significantly mediated the relationship between family support and physical activity, and while the relationship between availability of facilities and physical activity was substantially mediated by perceived barriers. The current study implies that application of the social ecological model is warranted to provide a more concrete association of the contextual factors to explain physical activity and to design a more effective intervention for promoting physical activity among older adults.El presente estudio investigó los efectos directos e indirectos de las variables psicológicas, socioambientales y físicoambientales para explicar la actividad física entre los adultos mayores de Corea. Un total de 401 adultos de 65 años de edad o más (Medad = 75,17 años, DT = ± 7,24) fueron reclutados del distrito de Nowon, en el norte de Seúl. Se utilizaron escalas estandarizadas para medir la actividad física y sus variables sociales y ecológicas. Los resultados indicaron que la actividad física estaba significativamente correlacionada con la autoeficacia, los beneficios percibidos, las barreras percibidas, el apoyo familiar, el apoyo a los amigos, la disponibilidad de instalaciones y la calidad de las instalaciones. Todas las variables ambientales psicológicas, sociales, ambientales y físicas tenían un efecto directo significativo para explicar la actividad física. Además, la autoeficacia y los beneficios percibidos mediaron de forma significativa la relación entre el apoyo familiar y la actividad física, y mientras que la relación entre la disponibilidad de instalaciones y la actividad física estaba sustancialmente mediada por las barreras percibidas. El presente estudio implica que la aplicación del modelo socio-ecológico se justifica para proporcionar una asociación más concreta de los factores contextuales para explicar la actividad física y diseñar una intervención más eficaz para promover la actividad física entre los adultos mayores.O presente estudo investigou os caminhos diretos e indiretos das variáveis ambientais psicológicas, sociais, ambientais e físicas na explicação da atividade física entre idosos coreanos. Um total de 401 adultos com 65 anos de idade ou mais (Mage = 75,17 anos, DP = ± 7,24) foram recrutados no distrito de Nowon, no norte de Seul. Escalas padronizadas foram utilizadas para medir a atividade física e suas variáveis sociais e ecológicas. Os resultados indicaram que a atividade física estava significativamente correlacionada com auto-eficácia, benefícios percebidos, barreiras percebidas, apoio familiar, apoio amigo, disponibilidade de instalações e qualidade das instalações. Todas as variáveis ambientais psicológicas, sociais, ambientais e físicas tiveram um caminho direto significativo para explicar a atividade física. Além disso, a auto-eficácia e os benefícios percebidos mediaram significativamente a relação entre apoio familiar e atividade física, e enquanto a relação entre a disponibilidade de instalações ea atividade física era substancialmente mediada por barreiras percebidas. O presente estudo implica que a aplicação do modelo sócio-ecológico é justificada para proporcionar uma associação mais concreta dos fatores contextuais para explicar a atividade física e para projetar uma intervenção mais efetiva para promover a atividade física entre os adultos mais velhos

La Croisée des regards entre littérature et photographie. Han Kang et Cha Mihye

Photography has been, form the mid nineteenth century to the present, a technological revolution providing numerous considerations through literature in western civilization. But what could be said about that relationship between photography and literature in an eastern civilization, especially in South Korea? We will take a closer look at a writer, Han Kang, and visual artist, Cha Mihye, who among many explore memory and history, from the traditional era to modernity. Their distinct works forge a vital reminiscence to explore a fast mutating country by decoding some major milestones. Works of Han Kang and Cha Mihye had once been juxtaposed in an editorial and exhibition project combination, offering a way to show the particular relationship between writing and Image-Making for a better understanding of some cultural issues for Korea. Linking a tumultuous past to a rushing present time, their sensitive and intimate experiences enlighten the complex and fragile but necessary recollection of a torn nation.Photography has been, form the mid nineteenth century to the present, a technological revolution providing numerous considerations through literature in western civilization. But what could be said about that relationship between photography and literature in an eastern civilization, especially in South Korea? We will take a closer look at a writer, Han Kang, and visual artist, Cha Mihye, who among many explore memory and history, from the traditional era to modernity. Their distinct works forge a vital reminiscence to explore a fast mutating country by decoding some major milestones. Works of Han Kang and Cha Mihye had once been juxtaposed in an editorial and exhibition project combination, offering a way to show the particular relationship between writing and Image-Making for a better understanding of some cultural issues for Korea. Linking a tumultuous past to a rushing present time, their sensitive and intimate experiences enlighten the complex and fragile but necessary recollection of a torn nation

Pseudo-Differential Neural Operator: Generalized Fourier Neural Operator for Learning Solution Operators of Partial Differential Equations

Learning the mapping between two function spaces has garnered considerable research attention. However, learning the solution operator of partial differential equations (PDEs) remains a challenge in scientific computing. Fourier neural operator (FNO) was recently proposed to learn solution operators, and it achieved an excellent performance. In this study, we propose a novel \textit{pseudo-differential integral operator} (PDIO) to analyze and generalize the Fourier integral operator in FNO. PDIO is inspired by a pseudo-differential operator, which is a generalized differential operator characterized by a certain symbol. We parameterize this symbol using a neural network and demonstrate that the neural network-based symbol is contained in a smooth symbol class. Subsequently, we verify that the PDIO is a bounded linear operator, and thus is continuous in the Sobolev space. We combine the PDIO with the neural operator to develop a \textit{pseudo-differential neural operator} (PDNO) and learn the nonlinear solution operator of PDEs. We experimentally validate the effectiveness of the proposed model by utilizing Darcy flow and the Navier-Stokes equation. The obtained results indicate that the proposed PDNO outperforms the existing neural operator approaches in most experiments.Comment: 23 pages, 13 figure

Pyridoxine induced neuropathy by subcutaneous administration in dogs

To construct a sensory neuropathy model, excess pyridoxine (150 mg/kg s.i.d.) was injected subcutaneously in dogs over a period of 7 days. During the administrations period, the dogs experienced body weight reduction and proprioceptive loss involving the hindquarters. After pyridoxine administration was completed, electrophysiological recordings showed that the M wave remained at a normal state, but the H-reflex of the treated dogs disappeared at 7 days. The dorsal funiculus of L4 was disrupted irregularly in the axons and myelin with vacuolation. The dorsal root ganglia of L4, and sciatic and tibial nerves showed degenerative changes and vacuolation. However, the lateral and ventral funiculi of L4 showed a normal histopathologic pattern. Although this subcutaneous administration method did not cause systemic toxicity and effectively induced sensory neuropathy, this study confirmed the possibility of producing a pyridoxine-induced sensory neuropathy model in dogs with short-term administration