김한솔 교수

BACKGROUND: The long-term incidence of chronic postsurgical pain (CPSP) after thoracic surgery has not yet been reported. METHODS: We retrospectively reviewed the electronic medical records of 4218 consecutive patients who underwent thoracic surgery for lung cancer between 2007 and 2016. We evaluated the long-term incidence of CPSP after thoracic surgery at intervals of 3 months for 36 months. A Cox proportional hazard regression analysis was performed to investigate the predictors of CPSP after

BACKGROUND: Dexmedetomidine sedation has advantages, such as low incidence of respiratory depression and prolonged block duration, but also significant disadvantages, such as slow onset, high rate of sedation failure, and a long context-sensitive half-life. Remimazolam provides rapid sedation and recovery, high sedation efficacy and has minimal hemodynamic effects. We hypothesized that patients who received remimazolam would require less rescue midazolam than dexmedetomidine. METHODS: Patients (

Random lasers have distinct advantages to be the next-generation light sources owing to their simple fabrication process, high flexibility in shape and size, and unique optical characteristics, such as low spatial coherence, high intensity, and multi-directionality. In this paper, we discuss how to realize random lasing with a high degree of circular dichroism with the aid of chiral plasmonic gold nanoparticles. The extinction dissymmetry factor of the chemically synthesized chiral plasmonic gol

We present a novel method for modal decomposition of a composite beam guided by a large-mode-area fiber by means of direct far-field pattern measurements with a multi-variable optimization algorithm. For reconstructing far-field patterns, we use finite-number bases of Hermite Gaussian modes that can be converted from all the guided modes in the given fiber and exploit a stochastic parallel gradient descent (SPGD)-based multi-variable optimization algorithm equipped with the D4σ technique in orde

AIMS: Hospital case volume is shown to be associated with postoperative outcomes in various types of surgery. However, conflicting results of volume-outcome relationship have been reported in hip fracture surgery. This retrospective cohort study aimed to evaluate the association between hospital case volume and postoperative outcomes in patients who had hip fracture surgery. We hypothesized that higher case volume would be associated with lower risk of in-hospital and one-year mortality after hi

Abstract In this letter, an investigation of the use of a covariance matrix adaptation evolution strategy (CMA‐ES) algorithm is conducted as the phase‐locking method for multi‐channel coherent beam combining (CBC) for the first time. A comprehensive numerical analysis is carried out on the operational performances of the CMA‐ES based phase‐locking algorithm implemented into 7‐ and 19‐channel CBC systems in a filled‐aperture format. Through numerical simulations it can be verified that the CMA‐ES

이 연구는 공공부문의 AI 활용 현상에 대한 이해를 높이기 위하여 AI기술의 공급과 수요라는 측면에서 분석틀을 제시하고 이를 활용하여 국내 공공부문에서 활용되고 있는 AI 기술 수준과 활용 영역을 실증적으로 탐구하는 것을 목적으로 한다. 먼저 국내외 선행연구에 대한 체계적 문헌검토를 통해 공공부문 AI 활용을 수요측면(활용영역)과 공급측면(활용기술)으로 구분하여 분석할 수 있는 이론적 분석틀을 도출하였다. 다음으로 2018년 이후 공공부문에서 AI 시스템을 적용한 사례 104건을 위 분석틀을 통해 전수 분석하였다. 분석결과 공공부문에서 활용되고 있는 AI 기술수준은 프로세스 자동화 및 예측 분석에서 처방 분석으로 급속도로 발전하고 있는 반면, AI 기술을 활용하는 영역은 정책결정, 공공서비스, 내부관리 가운데 공공서비스 영역에서의 ‘챗봇’ 활용 등 낮은 수준의 적용에 집중되는 현상이 확인되었다. 즉, 공급의 관점에서 국내 공공부문 AI 활용의 변화는 ‘진화(進化)’의 현상을 보이는

BACKGROUND: The TFA-1 adhesive forehead sensor is a newly developed pulse oximeter for the measurement of the plethysmographic variability index (PVI) at the forehead, and for the rapid detection of changes in oxygen saturation during low perfusion. OBJECTIVES: We evaluated the ability of the TFA-1 sensor to predict fluid responsiveness in children under general anaesthesia. DESIGN: Prospective cohort study. SETTING: Single tertiary care children's hospital. PATIENTS: Thirty-seven children aged

다문화사회로의 전환에 따라 다양한 문화에 대한 인정과 존중이 중요한 덕목으로 떠올랐다. 그러나 공통적 가치를 배제한 차이에 대한 강조는 극단적인 가치 상대주의를 초래하여 인간 존엄성의 파괴를 묵인하게 하고, 사회 통합을 위한 소통을 가로막음으로써 민주주의의 기반을 훼손할 수 있다. 따라서 다양한 문화가 민주적으로 소통하고, 평화롭게 공존하기 위해서 다양성 뿐만 아니라 공통성의 영역이 확보되어야 한다. 이에 본 연구에서는 인권이라는 보편적 가치가 다문화사회에서 가지는 의미에 주목하여, 청소년의 인권의식이 다른 문화와 교류하려는 욕구, 즉 문화간 감수성에 미치는 영향을 검증하고자 한다. 연구 결과, 인권의식의 하위 영역 중 인권감수성과 인권행동의사가 문화간 감수성에 유의한 영향을 미치는 변인으로 나타났다. 이러한 결과는 다문화사회의 민주적 재통합을 위해 인권 및 기본권 등의 헌법 교육이 강조될 필요가 있음을 시사한다.

We describe the ankle rehabilitation robot using a three-axis force/torque sensor. The Designed and manufactured three-axis force/torque sensor which can detect two directional force Fx, Fz and one directional torque Tz, was attached to the developed ankle rehabilitation robot. The robot was designed and manufactured using by three-axis force/torque sensor. The results of a characteristics test for the developed ankle rehabilitation robot showed that it was safely operated while the ankle bendin

BACKGROUND: Total knee arthroplasty is frequently associated with postoperative pain. Continuous adductor canal blocks are widely used for postoperative analgesia. However, the high dislocation rate of nerve block catheters often leads to ineffective pain control. This study aimed to compare the analgesic effectiveness of repeated daily injections of adductor canal block up to postoperative day (POD) 2 and continuous adductor canal block in patients who underwent total knee arthroplasty. METHODS

Background and Objectives: Positive airway pressure (PAP) is effective at reducing the number of complications in patients with obstructive sleep apnea (OSA). To the best of our knowledge, no cost-effectiveness analysis of PAP has been conducted in Korea. Subjects and Method: We classified subjects into two groups, those with moderate-to-severe OSA who used PAP after polysomnography (PAP treatment group) and those who did not receive a diagnosis and treatment (control group), and compared their

We carry out a numerical study on coherent control of multi-phase with SPGD and CMA- ES algorithms. We compare their performances and identify the distinct characteristic of each algorithm when used for phase control.

Coherence characteristics of non-stationary optical pulses in three distinctive regimes of “true” noise-like pulses (NLPs), symbiotic NLPs, and multi-soliton pulses are studied where they exhibited clearly different behaviors in terms of the degree of coherence.

We propose a fiberized plasmonic Fresnel-zone plate that can efficiently generate a radially polarized focused light in free space. The position of the focused beam is readily controlled by tuning the incident beam’s wavelength.