To maintain optimal performance in a floor heating system, the elements of system must be consisted of the adequate structure in order that the heat flow is efficiently transmitted from the floor structure to indoor space. The aims of this study is to propose the optimal structure type and present applicable design data of a floor heating system. The design data suggested in this study can be applied to cooperate energy efficiency design as well as comfortable indoor thermal environment in the early design stage.

This study is Korean traditional heating system, named 'AZABANG'. Ondol characterized by" Azabang "is dated back to 119 AD and it has approximately 2000 years history. Among various kinds of traditional radiant floor heating system, Ondol is the most reasonable and scientific one. This type of imaginative Ondol which have superior ability to keep temperature during a long period, roughly I 00 days could be attributable to the special structural pattern . The Ondol characterized by ''Azabang" represents extraordinary creativeness originated from Korean traditional culture and at the same time, it is the significant evidence that those missing historical rings, in some degree, have been connected. Therefore we well do our best to apply the scientific and reasonable concept into the real world.

We calculate the evolution of multiple supernova (SN) explosions inside a pre-exiting bubble blown up by winds from massive stars, using one-dimensional hydrodynamic simulations including radiative cooling and thermal conduction effects. First, the development of the wind bubble driven by collective winds from multiple stars during the main sequence is calculated. Then multiple SN explosion is loaded at the center of the bubble and the evolution of the SN remnant is followed for 106 years. We find the size and mass of the SN-driven shell depend on the structure of the pre-existing wind bubble as well as the total SN explosion energy. Most of the explosion energy is lost via radiative cooling, while about 10% remains as kinetic energy and less than 10% as thermal energy of the expanding bubble shell. Thus the photoionization and heating by diffuse radiation emitted by the shock heated gas is the most dominant form of SN feedback into the surrounding interstellar medium.

L2 speakers often encounter difficulties caused by a dual problem both with vocabulary and structure in delivering his or her intended message. This qualitative study reports on how the dual problem involving both lexical and syntactic problems can be managed by employing CSs. The participants were 12 Korean students studying in a university in the USA, whose language proficiency varied from limited to high advanced. For the data, the participants’ natural conversations in various settings were recorded and stimulated recalls were conducted on the recorded conversations. The study presents various CSs for managing dual lexical-syntactic problems (DL-SCSs) identified from an inductive analysis of the data. Based on a taxonomic analysis of the data, this study presents a taxonomy in which various DL-SCSs are organized in multiple levels. In this paper, examples illustrating how participants employed each DL-SCS are also provided. These examples show that L2 speakers employing appropriate DL-SCSs are likely to communicate their intended meaning despite massive dual problems. Based on the findings, this study suggests that L2 speakers should be encouraged to use DL-SCSs.

This study investigated how task involvement should be practiced to fulfill the theoretical assumptions of Task-Based Instruction (TBI). As the task involvement is to be understood as an indispensable component of TBI, how a high degree of task involvement can be secured and exerted in a most effective way was examined. Having analyzed the data obtained from questionnaire, interviews, reflection papers and proficiency tests, the study indicated that customized and timely feedback and comments on the learners’ performances as well as learners’ sense of responsibility were critical if the task involvement leads to desirable learning outcomes. The study also showed that consciousness-raising (CR) task originated from an authentic task was effective enough to help learners acquire linguistic knowledge in a contextual situation. It made suggestions for how to promote task involvement to better implement TBI, through which the learners can improve language proficiency fully taking advantage of their educational and cognitive experiences.

Ondol is a traditional heating system in Korea. After new building type, apartment was introduced from western world around 1960, there have been dynamic changes in heating system in apartment. At first, designers supposed that apartment should match to the stand-up-living-style and the radiator system regardless traditional life style. Dwellers, however, didn't accept such a heating system even though the increase of the use of standing type furnitures such as bed, sofa, table, sink etc. Nowadays, Ondol is facilitated to the entire of the home even to the living room and dining/kitchen which radiator system was supposed to be accepted by designers. This try and error process shows that heating system is not only the physical facility itself, but also the cultural element reflecting the properties of way of life. And also it prove that one culture can not substitute the other culture, but merely conflict, mediated each other.