김상진 교수

A novel type of ionic liquid crystal (ILC) was synthesized and used as a solid electrolyte in I2-free solidstate dye-sensitized solar cells (ssDSSCs). In particular, the properties of two ILCs, 1-[(4-ethenylphenyl)methyl]-3-butyl-imidazolium iodide (EBII) with a single aliphatic C=C bond and 1-[(4-ethenylphenyl)methyl]-3-vinyl-imidazolium iodide (EVII) with two aliphatic C=C bonds, were evaluated. The structures and morphologies of the ILCs were characterized using Fourier transform infrared spe

Objective: To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography. Materials and Methods: Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for coronary artery disease. The LA volumes were measured using two different methods: the two dimensional (2D) l

A strategy is reported that combines assembled nanostructures and solvent vapor treatment to manipulatethe gas permeability of graft copolymer membranes. The VC-g-POEM graft copolymer consists of poly(vinyl chloride)(PVC) main chains and poly(oxyethylene methacrylate) (POEM) side chains, and was synthesized via atomtransfer radical polymerization (ATRP). When the PVC-g-POEM membrane was treated with a good solvent vaporsuch as acetone, the CO2 permeability increased from 107 to 145 Barrer (1 Bar

Energetic composite materials are very important in military purpose and building explosion but, the role of polymer binder and the materials interfaces has been little reported. Here, we prepared energetic composites consisting of aluminum (Al), iron oxide (Fe2O3) and polymer, as the fuel, oxidizer and binder, respectively. Two different methods, i.e. physical mixing and compression molding were employed to form blended powder and composite film, respectively. The use of partially fluorinated p

The fashion industry is facing numerous sustainability-related challenges due to growing consciousness about the egregious extent of global environmental problems. This study examines research trends on sustainable fashion based on five macro trends related to sustainable innovation in the fashion industry. Using the content analysis and network anal- ysis methods, 115 research papers published in domestic and international journals from 2017 to 2021 were collected and analyzed. The study conclu

Objective: To validate the optimal cardiac phase and appropriate acquisition window for three-dimensional (3D) whole-heart coronary magnetic resonance angiography (MRA) with a steady-state free precession (SSFP) sequence, and to compare image quality between SSFP and Gd-enhanced fast low-angle shot (FLASH) MR techniques at 1.5 Tesla (T). Materials and Methods: Thirty healthy volunteers (M:F = 25:5; mean age, 35 years; range, 24-54 years) underwent a coronary MRA at 1.5T. 3D whole-heart coronary

Purpose: To evaluate the potential of prospective electrocardiography (ECG)-gated 64-slice multidetector computed tomography (MDCT) for evaluation of myocardial enhancement, infarct size, and stent patency after percutaneous coronary intervention (PCI) with stenting in patients with myocardial infarction. Materials and Methods: Seventeen patients who were admitted with acute myocardial infarction were examined with prospective ECG-gated 64-slice cardiac MDCT and magnetic resonance (MR) imaging a

Facilitated transport is one of the possible solutions to simultaneously improve permeability and selectivity, which is challenging in conventional polymer-based membranes. Olefin/paraffin separation using facilitated transport membrane has received much attention as an alternative solution to the conventional distillation process. Herein, we report olefin separation composite membranes based on the polymer blends containing AgBF4/Al(NO3)3 mixed salts. Free radical polymerization process was use

Facilitated transport is considered to be a possible solution to simultaneously improve permeability and selectivity, which is challenging in normal polymeric membranes based on solution-diffusion transport only. We investigated the effect of adding mesoporous TiO2 (m-TiO2) upon the separation performance of facilitated olefin transport membranes comprising poly(vinyl pyrrolidone), Ag nanoparticles, and 7,7,8,8-tetracyanoquinodimethane as the polymer matrix, olefin carrier, and electron acceptor

Purpose: To evaluate the clinical value of the multi-detector row computed tomography (MDCT) in the quantitative assessment of lung volumes and to assess the relationship between the MDCT results and disease severity as determined by a pulmonary function test (PFT) in Chronic Obstructive Pulmonary Disease (COPD) patients. Materials and Methods: We performed a PFT and MDCT on 39 COPD patients. Using the GOLD classification, we divided the patients into three groups according to disease severity;

Conventional gas separation membranes have a trade-off relation between permeability and selectivity. Here, we report simultaneously improved permeability and selectivity through a mixed matrix membrane (MMM) consisting of P25 and amphiphilic graft copolymer. A graft copolymer composed of poly(vinyl chloride) (PVC) and poly(oxyethylene methacrylate) (POEM) as the backbone and side chains, respectively, was synthesized. The glass transition temperature (Tg) of PVC-g-POEM decreased upon addition o

목적: 본 연구는 진폐증 환자에서 발생한 진행성거대섬유화의 FDG-PET 소견을 알아보고자 하였다. 대상과 방법: 진행성거대섬유화를 가진 11명의 진폐증 환자에서 FDG-PET과 흉부 CT를 시행하였다. CT 영상에서 진행성거대섬유화의 크기와 위치, FDG-PET 영상에서 진행성거대섬유화의 최대 및 평균 표준화섭취계수를 측정하였다. 평균 표준화섭취계수가 2.5를 초과한 환자에서 FDG 섭취가 높은 부위에서 세침 흡입 검사를 시행하여 폐암 및 폐결핵을 감별하였다. 진행성거대섬유화의 크기와 평균 표준화섭취계수의 상관관계는 Pearson’s 상관분석을 이용하였다. 결과: 11명의 환자에서 19개의 병변이 관찰되었다. 병변은 모두 폐상엽에 있었으며, 8명의 환자에서 양측, 3명의 환자는 우측에 있었다. 병변의 최대 직경은 1.3-6.4 cm(평균, 3.6 cm)이었다. 최대 표준화섭취계수는 0.5~8.1(평균, 3.8)이었고, 평균 표준화섭취계수는 0.4~5.9(평균, 2.9)이었다. 12

Ground source heatpumps(GSHPs) are among the mostefficient and comfortable heating and cooling technologiescurrentlyavailable,becausetheyusetheearth’snaturalheattoprovideheating,cooling,andoften,waterheating.AndBuilding IntegratedGeothermalSystem(BIGS)isoneofGSHPswhichinstallgroundheat exchanger(GHE)inenergy pilewithoutboreholetosavetheinvestmentcost.Therefore,theexperimentisto evaluatetheheatingperformanceofBIGSinKorea.Theexperimentalresultsindicatethattheaverageheatpump COPandoverallsystem’sCO

최근 스케치 인터페이스를 이용한 많은 컨텐츠 제작 기술들이 선보이고 있다. 특히 애니메이션 제작기술 발달로 인해 스케치북에 연필로 선을 그으면 그 선이 그대로 살아 움직이는 애니메이션으로 제작되는 시스템도 선보이고 있다. 본 연구에서는 스케치 인터페이스를 이용해 복수 항공기의 항공기동을 애니메이션하고 학습할 수 있는 시스템을 개발한다. 항공기의 비행은 대부분 3차원 공간상에서 이루어지고 특정한 규칙 없이 이동하는 일반 애니메이션과는 달리 독특하고 복잡한 비행패턴을 가진다. 즉, 가속과 감속, 상승과 하강, 직진과 선회 비행만이 아닌 가속하면서 하강하거나, 감속하면서 상승하는 등 두 가지 이상의 복합적인 이동패턴을 보인다. 이러한 복잡한 이동패턴들로 인해 항공기를 조종하는 조종사와 공중상황을 통제하는 통제요원들은 기존 애니메이션시스템을 이용해 전체적인 항공기동 상황을 학습하기 어렵다. 본 연구에서는 단위경로 스케치 기법을 제안하여 프레임기반의 애니메이션 제작에 비해 적은 입력만으로도