• 제어로봇시스템학회:학술대회논문집
• /
• 2003.10a
• /
• pp.657-662
• /
• 2003

A mechanical system controlled by human operator, such as master-slave system, includes human dynamics in the whole system and such a system is called a human-machine system. In the system, operator's skill is required considerably in order to realize a meaningful operation. In this paper, a new concept and design strategy of compensator that improves the operativity of human-machine system are proposed. The compensator is called "collaborater "that is named after "collaborator" who works together with people. We mean not to design the automatic controller but the compensator that works together with a machine so that human feels the fulfillment in the operation. Our aim is to realize cooperation of people and a machine on a higher level.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
• /
• 2001.05a
• /
• pp.131-135
• /
• 2001

Recently, Internet is used widely. Many Web sites, however, are not designed based on user's view. So, this research aimed at grasping the user needs and structure of Web site which user used easily. First, to grasp user needs, questionnaires about the motivation, the purpose and the evaluation items of Web page were done. As a result, we found the easiness for the user. Next, we made subjects operated test pages in which the number of classes and the amount of information were changed. We collected the quantitative data of the optimum number of classes, amount of information and retrieval time. As a result, there was a significant difference in each numerical value. The results of this research are available when constructing a web site. so, usability of Web site can be improved by them.

• Korean Institute of Interior Design Journal
• /
• v.25 no.1
• /
• pp.47-55
• /
• 2016

This article explores an extended sense of autonomy in contemporary architecture activated through the practice of fashion, by taking architect Rem Koolhaas' work Prada Epicenter in New York as a case. In doing so, it argues that throughout the work Koolhaas sets up a world in which the corporate and the individual are entangled together in complex ways. Instead of considering Prada Epicenter to be the exemplar illustrating that the global company-Prada-institutionalizes the designed commercial space in a top-down manner, this article claims that such a space imbricates a multiplicity of meaning that is generated at the intersections of the local and the global, the ordinary and the spectacular, and the individual and the institutional. In this respect French philosopher Gilles Lipovetsky's fashion theory works as a critical point: his claim that the ambivalence of fashion-both as corporate power and individual freedom-is a threshold encouraging us to better understand the operativity of late capitalism in daily life is extended to Koolhaas' case. In other words, Koolhaas' Prada Epicenter brings forth possibilities that the ostensibly technocratic and institutionalized space in fact works as a resillient field where senses of individual autonomy arise in the aid of corporative practice of branding.

• Earthquakes and Structures
• /
• v.19 no.1
• /
• pp.45-57
• /
• 2020

This paper presents the experimental application of a new method for seismic vulnerability assessment of buildings recently introduced in literature, the SMAV (Seismic Model Ambient Vibration) methodology with reference to their operational limit state. The importance of this kind of evaluation arises from the civil protection necessity that some buildings, considered strategic for seismic emergency management, should retain their functionality also after a destructive earthquake. They do not suffer such damage as to compromise the operation within a framework of assessment of the overall capacity of the urban system. To this end, for the characterization of their operational vulnerability, a Structural Operational Index (IOPS) has been considered. In particular, the dynamic environmental vibrations of the two considered strategic buildings, the fire station and the town hall building of a small town in the South of Italy, have been monitored by positioning accelerometers in well-defined points. These measurements were processed through modern Operational Modal Analysis techniques (OMA) in order to identify natural frequencies and modal shapes. Once these parameters have been determined, the structural operational efficiency index of the buildings has been determined evaluating the seismic vulnerability of the strategic structures analyzed. his study aimed to develop a model to accurately predict the acceleration of structural systems during an earthquake.

• Journal of the Korean Chemical Society
• /
• v.48 no.2
• /
• pp.195-202
• /
• 2004

Micellar catalysis is an essential part of theoretical and experimental curricular. The sodium dodecylsulfate (SDS) catalyzed reaction between glycine and potassium permanganate in acidic medium is an ideal kinetic experiment for the secondary and undergraduate physical chemistry laboratory, to show the effect of micellar catalysis on rate of the reaction. The reaction is conducted both with and without SDS to observe the rate enhancement in the presence of surfactant. To show surfactant catalysis a plot between k and [SDS] is plotted. As surfactant catalysis is observed even before the critical micelle concentration of SDS, this pre-micellar catalysis can be understood in the light of positive co-operativity. The value of positive cooperative index (n) has been found to be 2.37. Further, dependence of the reaction rate on substrate and oxidant concentrations is also discussed. The reaction follows pseudo-first-order kinetics. The overall reaction is second order, with first-order dependence on both glycine and permanganate concentrations. The theory of surfactant catalysis is also discussed. With the conditions specified in the experiment, total reaction times are in 3~4 hours lab session, thus allowing several data sets to be acquired in a single laboratory period. Preparation of solutions and procedure is also given in detail.