• Clinical and Experimental Pediatrics
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• v.49 no.9
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• pp.930-936
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• 2006

Although antiarrhythmic medication has been the main treatment modality for arrhythmia in children, in recent decades technological development and computerization have made great advances in nonpharmacological therapy. This article reviews the transcatheter radiofrequency ablation for tachycardia in children, recent advances of device therapy for bradycardia, antitachycardia pacing, implantable cardioverter defibrillator. As a new field of device therapy, cardiac resynchronization therapy for congestive heart failure is also mentioned.

• Proceedings of the Korean Geotechical Society Conference
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• 1994.09a
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• pp.209-216
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• 1994

Rock mass classifications have played an indispensable role in underground construction for several decades. An important issue in rock mass classifications is the selection of the parameters of greatest significance. There appears to be no single parameter that can fully describe a jointed rock mass for underground construction design. In this paper. We find some problems shen applied rock mass classification for underground construction in domestic, analyze the most significant parameters and parameters correlation influencing the behavior of a rock mass, and suggest the Simplied Rock Mass Rating system based on RMR method for effective underground supports.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2002.10b
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• pp.49-50
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• 2002

Rapid advancements in analytical instrumentations and techniques in the last several decades offer an unprecedented opportunity to analyze the complex chemistry and probe the surfaces for chemical evidence. Recent developments in nanotechnology provide further ability to examine phenomena and mechanisms at the nanometer level. As a result of these advances, our understanding of the complex lubrication system has improved significantly. This paper will attempt to provide a molecular basis of how lubricant and additives function in lubrication.

• Computational Structural Engineering : An International Journal
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• v.1 no.2
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• pp.81-87
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• 2001

A framework for reliability analysis of structural components and systems under conditions of statistical and model uncertainty is presented. The Bayesian parameter estimation method is used to derive the posterior distribution of model parameters reflecting epistemic uncertainties. Point, predictive and bound estimates of reliability accounting for parameter uncertainties are derived. The bounds estimates explicitly reflect the effect of epistemic uncertainties on the reliability measure. These developments are enhance-ments of second-moment uncertainty analysis methods developed by A. H-S. Ang and others three decades ago.

• Proceedings of the Optical Society of Korea Conference
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• 2002.07a
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• pp.248-249
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• 2002

The gaseous molecular condensation retardation by laser excitation has been known, but with limited success. Condensation inhibition between the gas phase molecules by laser excitation was clearly shown in many experiments.(1)-(2) However, surface condensation inhibition of the excited molecules has been controversial for the last several decades.(3)-(4) In 1994, S. J, Sibener and Y. T. Lee published an experimental evidence of the internal energy dependence of the surface condensation of gaseous $SF_{6}$ and $CCl_4$ molecules. (omitted)

• Proceedings of the Korea Concrete Institute Conference
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• 1999.10a
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• pp.681-684
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• 1999

The development of external prestressing methods has been one of the major trends in the concrete bridge constructions over the past decades. One of the promising methods to enhance the flexural strength of a externally prestressed girder is to place the tendons with large eccentricities. The test results in this study showed that the external prestressing of a composite girder increased the range of the elastic behavior, reduced deflections, increased ultimate strength, and added to the redundancy by providing the multiple stress paths. This study was conducted on the concrete bridges reinforced by the continuous girders and the external prestressing.

• Tuberculosis and Respiratory Diseases
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• v.72 no.3
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• pp.261-274
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• 2012

For decades, the standard technique for tracheostomy was the open, surgical technique. However, during the past 20 years, the use of percutaneous dilatational tracheostomy has been increased and shown to be a feasible and safe procedure in critically ill patients. The purpose of this report is to review the percutaneous dilatational tracheostomy technique, describe the role of bronchoscopy as guidance for the procedure, and identify the available evidences comparing percutaneous dilatational tracheostomy to surgical tracheostomy.

• Tuberculosis and Respiratory Diseases
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• v.76 no.4
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• pp.160-162
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• 2014

Increasing incidence of pleural infection has been reported worldwide in recent decades. The pathogens responsible for pleural infection are changing and differ from those in community acquired pneumonia. The main treatments for pleural infection are antibiotics and drainage of infected pleural fluid. The efficacy of intrapleural fibrinolytics remains unclear, although a recent randomized control study showed that the novel combination of tissue plasminogen activator and deoxyribonuclease had improved clinical outcomes. Surgical drainage is a critical treatment in patient with progression of sepsis and failure in tube drainage.

• Annals of Clinical Neurophysiology
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• v.4 no.2
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• pp.91-97
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• 2002

The field of critical care medicine has flourished, but an unfortunate result of improved patient survival in the intensive care unit is the occurrence of certain acquired neuromuscular disorders. During the last two decades, various neuromuscular disorders were recognized as common causes of weakness occurring in critically ill patients. The two most common disorders are an acute quadriplegic myopathy predominantly associated with the use of intravenous corticosteroids and neuromuscular junction blocking agents and severe systemic illness termed critical illness myopathy(CIM), and an axonal sensorimotor polyneuropathy termed critical illness polyneuropathy. I will review briefly about general components of the CIM.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.6 no.1
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• pp.109-114
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• 1997

In the past few decades, the measuring instrument industries have made rapid progress with increase on the demand in industries such as precision instrument, chemistry, electronics, industrial measurement and automobile. Thus, development strategy and technical advancement are required for both securing the competitiveness on products in the world market and industrial development. Intensifying competitiveness of measuring instrument is needed in the world market. It can be achieved by development of measuring instrument holding comparative priority. A development strategy should be drawn up in the long-term point of view for coping with the increasing demand of measuring instrument and securing competitiveness in the world market.