항만현장의 설계 및 시공관리를 위한 드론활용 3차원 모델 활용 방안 연구

송근목(Song, Geun Mok),민성원(Min, Sung Won),최준우(Choi, Joon Woo) 대한토목학회 2023 대한토목학회 학술대회 Vol.2023 No.10

UBT(Ubiquitous Based Test)의 사용성 개선을 위한 방향 연구

권근희(Kwon, Keun Hee),민성원(Min, Sung Won),나건(Nah, Ken) 한국디지털디자인협의회 2015 디지털디자인학연구 Vol.15 No.3

본 논문은ﾠ스마트 기기를 활용하여 개발된ﾠUBT 사용성개선을 위하여 사용자 평가를 바탕으로ﾠ개선 방안을 모색하고자 한 연구이다. 이를 위해 본 논문은 다음과 같은 순서로 진행하였다. 기존의 시험 준비 과정을 UBT특성에 맞추어 4단계로 나누었으며, 각 단계에서 응시자가 경험해야할 과정에 대하여 각 단계별로 연구를 진행하였다. Head mounted 방식의 영상 녹화 및 Think aloud방식으로 시험 진행 중에 발생하는 사용자의 Pain Point를 도출하였다. 기존의 시험방식과 다르며, 종이시험에 익숙한 응시자들이 많았기 때문에 그에 따라 발생하는 어려움들을 발견할 수 있었다. 이후 In-depth interview를 통해 보다 정성적으로 사용자의 불편함을 발견 하고자 하였으며, 이를 바탕으로 UBT에 개선에 관한 방향을 제안하였다. 향후 태블릿 PC기반의 시험에 관한 연구가 지속적으로 이어져 경제적, 사회적인 이점 뿐 아니라 사용성면에서도 효율성이 높아지기를 기대한다. This thesis is that UBT is made by using smart device based on user-test for usability to find improvement plan. I proceed on the 4 steps as follows. I divided pre-test process as 4 steps that related to UBT characteristics. I conducted research to find user experience that examinees have to go through for each process. I found the pain points of users. I conducted a test to find pain points that was dram from the video of Head-Mounted method and Think aloud method. I found that UBT is difference from the existing test method such as posture, habit etc. many examinees who are familiar with Paper-based test have had difficulty of using it. And then I performed In-depth interview to understand qualitative inconvenience of user. For the result, this study suggested new direction for improvement in UBT. Furthermore, this research can be expected not only beneficial effect on economy and society but also efficiency in usability.

실험연구 : 토끼의 격리폐 모델에서 Pinacidil, Tetraethylammonium과 Glibenclamide가 저산소성 폐혈관 수축반응에 미치는 효과

노영진 ( Young Jin Ro ),윤원희 ( Won Hee Yun ),김종수 ( Chong Soo Kim ),민성원 ( Sung Won Min ),김성덕 ( Seong Deok Kim ),김용락 ( Yong Lak Kim ) 대한마취과학회 2003 Korean Journal of Anesthesiology Vol.45 No.6

척추 수술시 자가 수혈의 경험

이지호(Ji-Ho Lee),윤강섭(Kang-Sup Yoon),김한수(Han-Soo Kim),도상환(Sang-Hwan Do),민성원(Sung-Won Min),김종수(Jong-Soo Kim),이동호(Dong-Ho Lee) 대한정형외과학회 1995 대한정형외과학회지 Vol.30 No.1

척추수술시 LABETALOL 을 이용한 유도저혈압

김종수,도상환,민성원 대한마취과학회 1994 Korean Journal of Anesthesiology Vol.27 No.1

The effect of labetalol on induced hypotension was studied in 13 patients undergoing major spine surgery. Hypotension was induced with initial dose of labetalol 0.4 mg/kg i.v. followed by 0.01 mg/kg/min i.v.infusion. BP, HR, and CVP were measured before, during, and after hypotension. Anesthesia was maintained with isoflurane (0.5-2 vol%) and N2O in 50% O2 supplemented by pancuronium. The time to systolic BP 75-85 mmHg or mean BP 55-65 mmHg was 18.5±2.8min and the time for systolic BP to recover 90% of prehypotensive value was 45.5±4.2 min. Heart rate was reduced signiTicantly after hypotension but remained stable at 80-90 beats/min thereafter. Central venous pressure showed no significant change irrespective of hypotension. The results suggest that combined use of fentanyl with labetalol or disuse of pancumnium may reduce the required dose of labetalol.

소도모세포증 환자의 마취 관리

김종성,김덕경,민성원,박재현 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.32 No.6

Nesidioblastosis, persistent hyperinsulinemic hypoglycemia of infancy (PHHI) is a disorder characterized by diffuse pancreatic islet cell hyperplasia arising from the ductal epithelium. Patients usually present during the neonatal or infantile period with apnea, hypotonia, poor feeding, lethargy, or seizure. Despite of greater awareness, one in three has some degree of mental retardation by the time the diagnosis is made. The diagnosis is established by demonstrating high plasma insulin concentration during an episode of hypoglycemia. This hypoglycemia is initially managed medically, but these medical treatment modalities are failed in more than half of nesidioblastosis. Patient who failed to respond to optimal medical treatment should be referred for surgery early, if permanent neurologic damage is to be avoided. The surgical procedure of choice is near total pancreatectomy (95∼98% resection). We herein discuss the anesthetic management of a patient with nesidioblastosis who presented for near total pancreaectomy. (Korean J Anesthesiol 1997; 32: 1031∼1035)

Halothane 마취시 유도저혈압을 위한 Sodium Nitroprusside 의 용량 및 심혈관계의 영향

이철,고홍,석세일,김광우,민성원,손주태 대한마취과학회 1989 Korean Journal of Anesthesiology Vol.22 No.6

The effects of deliberate hypotension by sodium nitroprusside (SNP) on the cardiovascular system and dosage of SNP were studied in 10 patients undergone Cotrel-Dubousset instrumentation for the operative treatment of scoliosis, spinal stenosis or herniated intervertebral disc. Mean arterial pressure decreased significantly (p$lt;0.05), but cardiac output, central venous pressure and sytemic vascular resistance showed no significant change, The correlations between average dose of SNP and age, body weight, and age to weight ratio were r= -0.4 (p$gt;0.05), r= -0.2 (p$gt;0.05), and r= - 0.25 (p$gt;0.05) respectively. The amount of whole blood transfused during the operation was 5. 3±1 .7 units. Hemoglobin and hematocrit decreased significantly (p$lt;0.05) from 11.3±1.3g/dl and 33.7±4.1% to 10.1±1.5g/dl and 30±4.1% during operation.

척추수술시 자가수혈의 경험

이지호,김종수,도상환,김갑수,민성원,조광태 대한마취과학회 1994 Korean Journal of Anesthesiology Vol.27 No.7

Autotransfusion has been used widely in surgical patients for the purpose of preventing complications associated with homologous transfusion. Recently it has been drawing much attention for the fear of transfusion-transmitted disease, especially AIDS. So we studied about the auto-transfusion applied to spinal surgical patients with various combinations of its methods in each patient. We measured perioperative changes of complete blood count associated with autotrans-fusion and the amount of blood salvaged by intra-and postoperative autotransfusion. And we scrutinized the occurrence of complications associated with transfusion. After presurgical blood deposit of 3 units (n=12), hemoglobin and hematocrit levels decreased to 12.0±1.2 gm% and 35.5±2.6% while the initial levels were 14.0±1.1 gm% and 40.6±2.8% respectively. The average salvaged blood volume during operation by Cell Saver (Haemonetics, USA) was 300±110 ml (n=14) and postoperatively salvaged blood volume using Orth-evac(TM) was 313±114 ml (n=14those who received postoperative autotransfusion (n=l4), 2 patients revealed febrile reaction immediately after transfusion, but fever subsided thereafter without specific treatment. In conclusion, autotransfusion was carried out safely in operations when transfusion was expected, and so we recommend autotransfusion as a method of transfusion by which the complications of homologous transfusion can be averted.

척추간공으로 거치된 카테테르로 인한 경막외 마취 실패

김종수,이상철,임영진,도상환,민성원,강기철 대한마취과학회 1997 Korean Journal of Anesthesiology Vol.32 No.5

One of the most common mechanisms of failure of epidural anesthesia is the misplacement of a catheter. We present two cases of transforaminal escape of catheter which occurred accidentally during lumbar epidural anesthesia. Epidural catheter was inserted to a depth of 4.5 cm and 3.5 cm respectively, then 2% lidocaine 25 ml were injected slowly into the catheter. No analgesia was found except anterior knee area, so Iohexol dye was injected through the catheter for X-ray determination. The epidurogram showed the catheter, which passed through the intervertebral foramen, was to lie outside the epidural space in the paravertebral tissue. Because of the random direction and migration of epidural catheter, we suggest an epidural catheter should be inserted 3cm into the epidural space. Epidurogram with a small dose of contrast material is advisable in the cases of unsatisfactory effect of epidural block, or when some adverse reactions are noted after block. (Korean J Anesthesiol 1997; 32: 834∼838)

정맥 마취 유도제 Thiopental 의 동정맥혈에서 약동학적 동정맥 차이와 약역학적 의의

김호순,김종성,김희수,김광우,민성원,신현택 대한마취과학회 1992 Korean Journal of Anesthesiology Vol.25 No.5

The arterial and venous differences of thiopental. pharmacokinetics and its impact on the onset of pharmacologic effect were examined in 6 male surgical patients with normal renal and hepatic functions during short time period of 6hrs post-intravenous bolus injection over 5 second(5 mg/kg). Arterial and venous blood samples were withdrawn from radial artery and subclavian vein, respectively at the time of right before and after injection(0), 5, 10, 20, 30, 45 (sec), l, 2, 5, 10, 30(min), 1, 2, 3, 4, 5, 6(hrs). Serum concentrations of thiopental were determined by reverse-phase, high performance liquid chromatography and the clinical endpoint of anesthesia induction were interpreted as the time of loss of consciousness by observing spontaneous closing of eyes and loss of eyelash reflex. As the results, significant differences between arterial and venous concentrations were noted during early phase lasting up to 10 minutes. Arterial data was best fitted to tri-exponential decay model. In analysing pharmacokinetic parameters with serum data of 6 hrs duration, there were no significant differences in AUCo-(area under curve), AUCO-t, and clearance(P $lt;0.05), but significant difference in peak concentrations(arterial: 103.97±12.15, venons:17.487±5.206ug/ml), and times to peak(arterial: 0.67±0.037, venous: 1.653±0.712min), AUMC O-t, MRT (mean residence time), apparent T ½(terminal half-life) and apparent Vdss(steady-state volume of distribution). Spontaneous eye closures were observed within 20 seconds(10-20sec) after the end of injection where arterial concentrations were at peak(n=3) or right after peak(n=3) and otherwise, venous concentrations were at low or even almost at zero(n=3), reflecting the fact that arterial eoncentrations are directly correlated to the clinical efficacy and more important in pharmaco-kinetic and dynamic aspect of drug.