Interface dynamics of table tennis

The purpose of this study was to discussed the Interface Dynamics of Table Tennis. The experiment was conducted based on the imaging principle of hot air flowing. We adopted the imaging principle of hot air flowing through rotating ball to simulate the flow phenomenon generated by air flowing through table tennis after striking by different rackets. The conclusion and suggestion after analyzing and discussing are described below: (1) The rotation of table tennis ball and flow field will change based on the roughness of rackets, which making its own contribution to the existence of changes in the rotation of table tennis ball. (2) It can learn that angle should forward 30 degrees with flat strike, 25 degrees with short particles and 20 degrees with long particles at the rotational speed of 7500 rpm. All flow fields of different rackets are similar

El derecho a la accesibilidad de la educación para personas con discapacidad física, Arequipa, 2021

El trabajo de investigación se realizó con el objetivo de determinar cómo el derecho a la accesibilidad de la educación se vulnera para personas con discapacidad física, siguiendo el enfoque cualitativo, diseño de teoría fundamentada y tipo de investigación básica, para lo cual se utilizó la técnica de la entrevista, la técnica de análisis documental y análisis normativo, aplicando para ello sus respectivos instrumentos, como fueron la guía de preguntas de entrevista, la guía de análisis documental y la guía de análisis normativo. Los cuales se aplicaron a unos determinados participantes compuesto por especialistas derecho constitucional y a docentes que trabajan en instituciones educativas. Se procedió a procesar los datos con las técnicas de análisis de datos, interpretación jurídica, logrando así alcanzar los resultados, la discusión y se concluyó que, el derecho a la accesibilidad de la educación se vulnera debido al incumplimiento por parte de las instituciones educativas a adecuar la infraestructura de sus establecimientos para el fácil acceso de personas con discapacidad física

Why Focal Firms Share Information? A Study of the Effects of Power and Information Technology Competence

Supply chain management has become an important issue for Taiwan\u27s manufacturing industry due to escalating global competition. Virtual vertical integration is an important issue in supply chain management. Because organizations only have limited resources, they pursue long-term partnership with specific transaction partners. They share information to improve visibility, speed responses to markets, and reduce costs from information distortion or information asymmetry. This study empirically explores the factors affecting inter-organizational information sharing from the perspective of focal firms. 1,000 questionnaires were administered to top 1,000 manufacturing companies in Taiwan, with 139 valid responses. The results show that partner\u27s power and relation-specific asset investments positively affect inter-organizational information sharing. On the other hand, the partner\u27s power does not significantly affect the organization\u27s relation-specific investments. This study further investigates the moderating role of information technology competence. The result indicates that when an organization has lower information technology competence, the relationship between the partner\u27s power and relation-specific investments is significant. Implications and discussion are then provided

IT/IS as the Secret Scroll of Kung Fu: A Functionalist Explanation of A Technical Structure for Information Systems Design

A company encounters many negative social consequences and persistent problems when it adopts a specific technical structure for an information system (IS). But, why do they continue using it, not wishing to abandon it? This paper uses the functionalist explanation to interpret the contradictory phenomenon through a real case which expects to enhance work efficiency and improve business processes by developing a new IS. During IS development and implementation, the rivalry between IT personnel and users occurs while they closely cooperate. Nevertheless, a shared belief that “IT/IS as the Secret Scroll of Kung Fu”, which implies IT/IS with a magic power, has been unexpectedly developed between them. In other words, both divisions believe that IT/IS would be able to solve all unintended problems to be encountered. Therefore, they still kept cooperating to develop IS, and did not admit the failure of IS

Early markers of angiogenesis and ischemia during bowel conduit neovascularization

Background Bowel flaps are a good and reliable method to restore the continuity of the aerodigestive tract. Radiated fields, contaminated recipient sites, or depleted recipient vessels may increase the risk for ischemic injury after transfer. During ischemic events, we believe that bowel conduits with serosa have a delayed neovascularization process at its new recipient site. We conducted an ischemia/reperfusion murine model to understand the difference among bowel conduits with and without serosa. Materials and Methods Two groups of rats were compared: control group (jejunal conduit with serosa) and a target group (jejunal conduit without serosa). These conduits were harvested from the peritoneal cavity and transferred into a subcutaneous pocket. After 72 hours of transfer and pedicle ligation, histological changes related to ischemia/reperfusion were assessed. In addition, tissue markers of angiogenesis (CD34), ischemia (lactate dehydrogenase [LDH]), and inflammation (interleukin [IL]-1β and IL-6) were analyzed. Results Two groups (n = 20) of male rats were analyzed. Histology showed intact jejunal mucosa in the target group. The control group showed decreased number of mucin, globet cells, decreased height, and fragmentation of villi with the absence of intestinal glands. Markers of angiogenesis (CD34) were higher in the target group. In addition, markers of ischemia (LDH) (p = 0.0045) and inflammation (IL-1b, p = 0.0008, and IL-6, p = 0.0008) were significantly lower in the target group as compared with the control group. Conclusions In circumstances in which the recipient site does not offer an adequate and healthy bed or a vascular insult occurs, bowel flaps with less amount of serosa may be able to neovascularize faster thereby increasing its chances of survival