Jong-Phil Kim

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After a basic theory on the passivity condition for the sampled-data system has been reviewed, passivity conditions on each subsystem of haptic simulation have been investigated. In addition, the virtual wall simulation is analytically analyzed with the passivity conditions and derived the previously well known stability condition ( / 2 ) b KT B ≥ + . Based(More)
Stability is one of the important considerations in the design and control of haptic simulation systems because unstable behavior may cause damage on human operator or deterioration of realistic haptic feeling. In this paper, a basic theory on the passivity condition for the sampled-data system has been reviewed and energy relations on each subsystem of(More)
This study was performed to evaluate the effects of epigallocatechin 3 gallate (EGCG) on lipopolysaccharide (LPS)-induced acute lung injury in a murine model. In the present study, production of TNF-α and MIP-2 and activation of extracellular signal-regulated kinases (ERK)1/2, c-Jun amino terminal kinases (JNK) and p38 in RAW264.7 cells were measured. EGCG(More)
Haptics has been studied as a means of providing users with a natural and immersive tactile sensation in real, augmented, and virtual environments in the various areas. However, in spite of the considerable advantages offered by haptic technology, it is still relatively unfamiliar to the general public. One of reasons for this unfamiliarity is the lack of(More)
This paper presents basic idea and feasibility test results of the energy-bounding algorithm (EBA) for bilateral teleoperation. Various test results for free, contact, and abrupt motions show that the EBA can ensure stable bilateral teleoperation for the fairy large constant/variable time delays (2.5 sec for free motion and 300 msec for contact motion). In(More)
Stability and transparency are two major conflicting requirements in haptic interaction systems: some level of transparency is required for providing a realistic feeling while avoiding unstable behaviors that may completely destroy the contact realism of virtual environments or injure the human operator. In this paper, we propose a new(More)
Service-oriented architecture (SOA) provides an ability to satisfy the increasing demand of the customer for complicated services in business environments via the composition of service components scattered on the Internet. Service composition is a mechanism to create a new service by the integration of several services to meet complex business goals. Web(More)
This paper presents an energy-bounding approach to a rate-mode bilateral control of remote vehicles in order to guarantee the robust system stability in variable time-delayed and data-dropped telecommunication environments. The velocity error between desired and actual remote vehicle velocities is reflected in term of force in order to maintain the desired(More)