Validation of coupled waveguide finite element-wavedomain boundary element (WFBE) method for the case of an infinite plate strip

The purpose of the work reported here is to validate and verify results obtained using the Waveguide Finite Element and Wavedomain Boundary Element(WFBE) method using the software WANDS. This study concerns the vibro-acoustic behaviour of a plate strip in terms of its mobility, sound radiation and transmission loss. Moreover, it aims to provide a basis for employing the method in more complicated cases. The plate strip is assumed to be infinite in length but have a finite width where it is confined by parallel boundaries. Simply supported boundaries are considered, allowing ready comparison with analytical results. The comparisons between the analytical results and the numerical ones show that WFBE is applicable for investigating the waveguide structure behaviour. However, some practical aspects of implementing this method using the WANDS software should be borne in mind in order to obtain correct results. Firstly, the Waveguide Boundary Element (WBE) mesh must have a closed boundary. Secondly, for comparison with the analytical results, a finite rigid baffle needs to be included in the model by extending the length of the WBE fluid model beyond the width of the structure. Thirdly, in the current implementation of WANDS it is better to use solid elements rather than plates for calculating cases incorporating the WFE-WBE coupling, e.g. the radiated power and the transmission loss. This latter aspect could be dealt with by improvements to the software

Development of a model to assess acoustic treatments to reduce railway noise

Porous materials have recently been used in absorptive treatments around railway tracks to reduce noise emissions. To investigate the effect of porous materials, a finite element model has been developed. 2D models for porous materials have been considered either as an equivalent fluid or as a poroelastic material based on the Biot theory. The two models have been validated and compared with each other to check the effect of the skeleton vibration. The poroelastic FE model has been coupled with a 2D acoustic boundary element model for use in railway applications. The results show that it may be necessary to include the frame vibration, especially at low frequencies where a frame resonance occurs. A method for the characterization of porous materials is also discussed. From this it is shown that the elastic properties of the material determine the resonance frequency and the magnitude

Prediction of radiation ratio and sound transmission of complex extruded panel using wavenumber domain finite element and boundary element methods

Recently, complex shaped aluminium panels have been adopted in many structures to make them lighter and stronger. The vibro-acoustic behaviour of these complex panels hasbeen of interest for many years but conventional finite element and boundary element methods are not efficient to predict their performance at higher frequencies. Where the cross-sectional properties of the panels are constant in one direction, wavenumber domain numerical analysis can be applied and this becomes more suitable for panels with complex cross-sectional geometries. In this paper, a coupled wavenumber domain finite element and boundary element method is applied to predict the sound radiation from and sound transmission through a double-layered aluminium extruded panel, having a typical shape used in railway carriages. The predicted results are compared with measured ones carried out on a finite length panel and good agreement is found

Fukita Pavilion

https://openscholarship.wustl.edu/bcs/1270/thumbnail.jp

Teshima Art Museum

the 25cm thick concrete shell acts as the enclosure and the structure of the installation space.https://openscholarship.wustl.edu/bcs/1212/thumbnail.jp

COMPARISON OF FOOT MORPHOLOGY AND PREFERRED SHOE FOR IMPROVING RUNNING SHOE FITTING

The purpose of this study was to compare the shoe internal space and foot shapes of different type for increasing sense of shoe fitting. 347 healthy subjects (male=160; female=187) without any pathological conditions of the foot participated in this study. 11 pairs of running shoes have different size (230-280mm) with same material and appearances were prepared and the shapes of shoe last were also measured for these shoes. In order evaluating the sense of shoe fitting, 6 fit indicators were analysed by comparing the shape of shoe last with foot morphology. We could find that people with wider feet tend to wear tighter shoes and narrower feet preferred to wear looser shoes that seems to significantly affect by the experience. And the sense of shoe fitting was significant different from gender and foot type which can be used as important data for recommending shoe size and to make customized shoe

A Review of Multiple Intelligences Education Programs of Interpersonal Intelligence

2001Since Howard Gardner's introduction of multiple intelligences (MI), a variety of education programs based on MI have been developed and implemented. The programs have a wide spectrum of aims, content, methods of instruction, testing and, evaluation. A review of those programs of interpersonal intelligence of MI was felt necessary in order to have clearer ideas about our position in applying multiple intelligences to education. The review was undertaken following the steps of why, what, when, where, who, and how in regards to the characteristics of the MI programs examined. The results are as follows. The objectives of educational programs of MI can be divided into two categories: Firstly, to improve the quality of teaching subject matters through or by using MI. Secondly, to improve and develop MI itself. The contents of the reviewed programs were focused either on the roles (or end-state) or the components of the interpersonal intelligence domain. Some programs used both as contents for teaching. For the better MI program, the symbol system in that domain should be considered as the content. The environment in which the programs were conducted was mostly in ordinary classrooms equipped with MI materials or MI-specific learning centers. The effects of the programs were generally better when the students were younger. The methods of instruction used in the programs focused either on providing experiences or direct teaching/training of MI using intellectual strengths. The roles of teachers of the program were mostly those of evaluators, observers or facilitators. In conclusion, the educational programs of MI reviewed here have shown a remarkable progress in both the extent and quality over a comparatively short period. However, it is worth mentioning that the programs should entail clearer and more idiosyncratic identity: They should differ from the educational programs of IQ, creativity, morality, Emotional Intelligence, or simply academic improvement. This means that the programs seem to be not entirely faithful to the authentic theory of MI and that they should henceforth seek to apply more closely authenticity of MI theory which underpin multiple intelligences

Emotional Intelligence of Korean Students and its Recent Research Trends

In Korea, emotional intelligence is based on the concept and components proposed by John Mayer and Peter Salovey, and the model proposed by Professor Moon Yong-Rin is the most widely used. Moon Young-Rin defined the concept of emotional intelligence as the ability of mental process to evaluate and express one’s own emotions of others, to regulate emotions, and to use emotions in a socially adaptive way. 4 domain 16 factor model is the most widely used in Korea: Recognition and expression of emotions; Emotional thinking promotion; Use of emotional knowledge; and Reflective regulation of emotions. Emotional intelligence is reported to be deeply related to creative disposition and positively correlated with academic achievement. For healthy student education, the measurement, education, and training of emotional intelligence should be studied and improved continually in Korean society. Future researches to find out Koreans’ unique emotions and structure are hoped to continued

Details on frustration in the process of an international joint conference project (1) : a case study on communication barrier between two business communication associations

Departmental Bulletin Paper彦根論叢, 第172号・人文科学特集第32号合併, pp. 1-19The Hikone Ronso, No.172, pp. 1-19departmental bulletin pape