• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2009.05b
• /
• pp.209-212
• /
• 2009

During the last few decades, several companies and research laboratories have developed construction robots in an effort to improve productivity, quality, and reduce construction time and safety concerns. Recently, domestic construction industry is also interested in developing the construction robots. However, the studies on the research and development process is impossible in real field. A existing research's object is the development of the research on the assumption that construction's environment is a fixed form, But real construction's environment is very dynamic and atypical. So it is very difficult that we apply construction automation and robots. In order to solve this problem, this study deduce influential factors on decision making of frame construction scheduling for automated construction.

• Journal of Mechanical Science and Technology
• /
• v.20 no.8
• /
• pp.1183-1194
• /
• 2006

The aim of this study was to identify the characteristics of the flexion withdrawal reflex modulated by the hip angle and hip movement in spinal cord injury (SCI). The influence of the hip position and passive movement were tested in 6 subjects with chronic SCI. Each subject placed in a supine position and lower leg was fixed with the knee at 5 -45 degree flexion and the ankle at 25-40 degree plantar flexion. A train of 10 stimulus pulses were applied at 200 Hz to the skin of the medial arch to trigger flexion reflexes. From results of the regression analysis, static properties of normalized muscle activation of flexor muscles have the linear relationship with respect to hip angle (P< 0.05). In order to verify the neural contribution of flexion reflex, we compared the static and dynamic gains of estimated muscle activations with measured EMG of ankle flexor muscle. Form this study, we postulate that the torque and muscle response of flexion withdrawal reflex have linear relationship with hip angle and angular velocity.

• Archives of design research
• /
• v.15 no.3
• /
• pp.231-240
• /
• 2002

The relationship between doffing and body has been fixed, deconstructism evoked doubt about not only presence or absence of body but also identity for wear. In the result, meta-body which is beyond the existent body was proposed through deconstruction of body which is main concept for doffing. The decostructive body have an effect on the way of expressions and forms for doffing as well as the rational doffing, and propose various types of body absence in clothing. The results are: 1. the absence of gender identity 2. the absence of wholeness in harmony 3. the absence of doffing form 4. the absence of meaning as clothing

• IE interfaces
• /
• v.14 no.2
• /
• pp.140-147
• /
• 2001

In the turbine-blade manufacturing industry, turbine-blades are machined and then are assembled to form a circular roll of blades. The roll of blades should be balanced as much as possible, since otherwise the efficiency of the turbine generator might be damaged. A locking blade is a blade whose location is fixed and a non-locking blade is a blade whose location can be freely changed. In this paper, we study methods for balancing the weights of the rotating blades for a turbine where some blades are locking blades. The turbine-blade balancing problem is formulated into a mixed-integer programming problem, which turns out to be NP-hard. A heuristic method based on the number partitioning algorithm is developed and the computational experiments show very promising results.

• Journal of Communications and Networks
• /
• v.11 no.3
• /
• pp.261-270
• /
• 2009

We propose a tree-based integration of infrastructure networks and MANETs (TUM) to efficiently extend the scope of mobile Internet protocol to mobile ad hoc networks and devise a tree-based routing protocol (TBRP) that is suitable for the TUM architecture. Infrastructure networks have a number of fixed Internet Gateways that connect two heterogeneous networks. Mobile nodes form a number of small trees named pMANETs, each of them growing from anchor node which can communicate directly with an Internet Gateway. A new node registers with foreign agent and home agent along the tree path without resorting to an inefficient flooding. Furthermore, the TBRP sets up a routing path efficiently by exploiting the tree information without relying on flooding. We show by resorting to simulation that our approach is competitive against the conventional AODV based approach.

• The Transactions of the Korean Institute of Electrical Engineers
• /
• v.38 no.11
• /
• pp.905-912
• /
• 1989

An adaptive control scheme is presented for uncertain systems whose uncertainties are upper-bounded by a linear combination of unknown constants and known continuous functions. The state of the closed-loop system is proven to be ultimately bounded. The proposed method modifies the method of Corless and Leitmann in the following two respects. First, the linear region of the saturation function in controller is fixed. Second, the intergration from in parameter estimator is replaced by a low pass filter form. These modifications prevent performance degradation and destabilization of the control system more effectively. The norm of the system states can be made sufficiently small by an appropriate choice of design parameters in the control law. The applicability of the proposed scheme is demonstrated in the position control of a simple pendulum via simulation.

• Journal of the Korea Furniture Society
• /
• v.13 no.2
• /
• pp.1-10
• /
• 2002

A computer top table was manufactured with the solid wood wastes that has been landfilled, combustion or burnt as a fuel at the present time. The computer table is different in form and size to that of existing fixed rectangular. It is idea1 product not only convenient and functional to use and beautiful design but also processing Performance of edge area and overlaying properties. The main technologies to develop this computer top table are plan for moulder to mould the Product and producing, molding the most suitable material and composition, suitable adhesives selecting and synthetic technology, investigation for the moulding conditions such as temperature, time etc, adequate overlaying materials selecting and overlaying technology have to be chocked.

• Journal of Theoretical and Applied Mechanics
• /
• v.1 no.1
• /
• pp.29-67
• /
• 1995

A procedure is formulated, in this paper, to compute the bifurcation modes born by the stability change of normal modes, and to compute the forced responses associated with bifurcation modes in inertially and elastically coupled nonlinear oscillators. It is assumed that a saddle-loop is formed in Poincare map at the stability chage of normal modes. In order to test the validity of procedure, it is applied to one-to-one internal resonant systems in which the solutions are guaranteed within the order of a small perturbation parameter. The procedure is also applied to the exact system in which normal modes are written in exact form and the stability of normal modes can be exactly determined. In this system the stability change of normal modes occurs several times so that various types of bifurcation modes are created. A method is described to identify a fixed point on Poincare map as one of bifurcation modes. The limitations and advantage of proposed procedure are discussed.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2006.05a
• /
• pp.288-292
• /
• 2006

Usually, equations that calculate ground resistance of earth electrode was already informed well by form of earth electrode. But, when apply on the spot because general expressions are very insufficient at point that calculate exact ground resistance value by variation of earth electrode, and constant value that corrective coefficient for ground resistance calculation is fixed regardless of change of the earth resistivity specially is presented, it is actuality that difficulty is. Therefore, in this study, about these problem, proposed corrective coefficient for calculation of ground resistance according to change of the earth resistivity.

• Journal of the Korean Institute of Rural Architecture
• /
• v.3 no.2
• /
• pp.1-12
• /
• 2001

This study is about the residential district structure of Gyeryong ceramic art village in Gyeryong ceramic art village is a residential district for potters who succeed to and develop Gyeryong ceramic art. The external appearance of Gyeryong ceramic art village seems like being fixed and simplified. The creative space is either detached or attached to a living room. The relation between inner and outer space is that is directly connected to a garden. In the characters of major spaces, the formation of a workshop is the most important part of a house. And, an exhibition equipment and an oven are connected to the workshop. According to the study, a house, which is designed without an architect's help is simple and has a different form from a house designed by an architect.