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윤수아,임애란 한국자기공명학회 2011 Journal of the Korean Magnetic Resonance Society Vol.15 No.2
The line widths and spin–lattice relaxation times of protons in [N(C_(2)H_5)_4]_(2)CoCl_4 and [N(CH_3)_4]_2CoCl_4 single crystals were investigated in the temperature range 160–400 K. The temperature dependences of the spin–lattice relaxation times are attributed to the molecular motions of the ethyl and methyl groups in the [N(C_(2)H_5)_4]^+ and [N(CH_3)_4]^+ ions respectively. The NMR line widths indicate that the ethyl groups in [N(C_(2)H_5)_4]_(2)CoCl_4 have one more degree of freedom than the methyl groups in [N(CH_3)_4]_2CoCl_4. The experimental results are interpreted in terms of the reorientations of the methyl and ethyl groups.
개선된 PG 방법에 의한 초해상도 영상의 인식 성능개선
윤수아(Soo-Ah Yoon),이태균(Tae-Gyoun Lee),장효식(Hyo-Sik Jang),원철호(Chul-Ho Won),이상헌(Sang-Heon Lee),손명규(Myoung-Kyu Sohn),이장우(Jang-Woo Lee),김덕규(Duk-Gyoo Kim) 한국멀티미디어학회 2010 한국멀티미디어학회 학술발표논문집 Vol.2010 No.2
최근 보안시스템의 감시 응용에 대한 요구가 증대됨에 따라 초해상도 영상을 입력으로 사용하는 얼굴인식 연구가 활발히 진행되고 있다. 초해상도 기술은 동일한 물체를 촬영한 여러 장의 저해상도 영상으로 고해상도 영상을 만들어내는 기술이다. 본 논문은 PG 방법을 사용한 초해상도 영상을 얼굴인식 시스템에 사용하는 방법을 제안한다. PG 방법을 사용한 초해상도 영상은 얼굴인식 시스템에서 가장 중요한 입력영상의 특징을 왜곡시키는 단점이 있다. 이러한 문제를 줄이기 위해 초해상도 영상복원의 후처리과정으로 선명화 필터와 중간 값 필터를 삽입하여 수행한다. 실험결과에서 제안한 필터삽입방법을 사용한 복원영상은 다른 다양한 방법으로 복원된 초해상도 영상보다 우수한 얼굴인식 결과를 얻었다.
윤수아 ( Su A Yun ),구현철 ( Hyun Cheol Koo ),장지웅 ( Ji Woong Jang ),김안나 ( An Na Kim ),김용식 ( Yong Sik Kim ),정성희 ( Sung Hee Jung ),김새희 ( Sae Hee Kim ),성우경 ( Woo Kyung Sung ) 대한췌장담도학회 2014 대한췌담도학회지 Vol.19 No.2
Renal cell carcinoma (RCC) is the second most common urological malignancy and it has diverse range of clinical manifestation. One third of the patients show the metastasis at the time of the diagnosis. The common sites of metastasis are the lung, bone, lymph nodes and metastasis to the pancreas is rare. In case of pancreatic metastasis, more than half of the patients are asymptomatic. Patients with symptoms visit hospital complaining of abdominal pain, weight loss, steatorrhea and rarely biliary obstruction. Although about 40% of all patients visit hospital with hemorrhage, cholangitis caused by spontaneous pancreatic hemorrhage is rare. We report an interesting case of 61-year-old woman with cholangitis caused by bleeding due to pancreatic metastasis from renal cell carcinoma.
나영민,윤수아,윤희정,이승연 대한노인병학회 2014 Annals of geriatric medicine and research Vol.18 No.4
Strongyloides stercoralis is an intestinal nematode with a complex life cycle, including a free living cycle, a parasitic cycle, and an auto-infection cycle. S. stercolaris infection may occur in both immunocompetent and immunocompromised individuals. It is usually asymptomatic and undetectable for decades in a healthy host. In immunocompromised patient, however, it may cause life threatening hyperinfection involving multiple organs. In Korea, several cases of Strongyloides hyperinfection have been reported since 1959. However, reports with gastric involvement and peritoneal invasion are rare. This is a report of gastric strongyloidiasis hyperinfection identified at ascites in an elderly patient who had subtotal gastrectomy due to stomach cancer.
Ultrasound-guided transhepatic computed tomography cholecystography in beagle dogs
김동은,박승조,김철현,윤수아,최지혜 대한수의학회 2019 Journal of Veterinary Science Vol.20 No.4
This study was performed to evaluate the feasibility of ultrasound-guided computed tomography (CT) cholecystography and to establish an optimal protocol. In 8 healthy beagles, CT cholecystography was conducted using four contrast formulas; two dilution ratios (1:1 vs. 1:3) and two total volumes (8 mL vs. 16 mL) of 300 mgI/kg iohexol after ultrasound-guided percutaneous contrast injection into the gallbladder. CT images were obtained at 3, 10, and 30 min after injection and assessed qualitatively and quantitatively. For all contrast formulas, CT cholecystography showed the gallbladder and the intra- and extrahepatic bile ducts. The volume of the gallbladder and size of bile duct were significantly larger when using a volume of 16 mL iohexol than an 8 mL volume regardless of the dilution ratio. The distinction between the common bile duct and duodenum, the filling of the gallbladder, and the patency of bile duct were effectively assessed using a 16 mL volume of contrast agent with either dilution ratio. Beam-hardening artifacts deteriorated CT image quality for visualizing the biliary system when using the dilution ratio of 1:1. Patency of the bile tract could be easily evaluated using a curvilinear planar reconstruction. There was no significant difference in CT scan time among the different conditions. Minor leakage of contrast agent temporarily occurred after contrast injection in 30% of 32 sets of CT cholecystography. Ultrasound-guided percutaneous cholecystography can visualize both gallbladder and biliary tract with minimal artifacts using a contrast agent volume of 16 mL with a 1:3 dilution ratio.
박현주,조진생,김낙민,윤수아,윤희정 대한감염학회 2016 Infection and Chemotherapy Vol.48 No.2
The incidence of human immunodeficiency virus (HIV) infections continue to increase throughout the world. Although neurologic complications are frequent in individuals with HIV infection or acquired immunodeficiency syndrome (AIDS), vestibulocochlear neuritis is still a relatively rare manifestation. We report the first case of vestibulocochlear neuritis occurring in an AIDS patient in Korea.
노인에서 발병한 흉선종에 의한 이소성 부신피질자극호르몬증후군 1예
김민규,유일환,김주석,윤수아,이재민,유혜민,박강서 대한노인병학회 2013 Annals of geriatric medicine and research Vol.17 No.4
A 70-year-old woman who developed a moon face was hospitalized. At admission, adrenocorticotropic hormone (ACTH)and serum cortisol levels were elevated. A high-dose dexamethasone suppression test demonstrated that cortisol secretion was uninhibited. Furthermore, chest computed tomography revealed an anterior mediastinal mass. On the basis of these results, ectopic ACTH syndrome was diagnosed and complete resection of the thymic tumor was performed. Histological examination revealed large cell neuroendocrine carcinoma of the thymus and positive immunoreactivity for ACTH. However, despite complete excision of the thymic tumor, ACTH and serum cortisol levels were high. Therefore,we investigated whether the lesion had recurred or metastasized; however, the results were inconclusive. Finally,laparoscopic bilateral adrenalectomy was performed to control the hypercortisolemia. After the surgery, the serum cortisol level was well-controlled and the general condition of the patient was good.
Torsades de Pointes during Treatment of Tachycardia-Induced Cardiomyopathy
이동규,유일환,유지형,윤수아,박상현,강기운,김원호,최유정,정경태,진정연 대한중환자의학회 2014 Acute and Critical Care Vol.29 No.1
Tachycardia-induced cardiomyopathy is caused by persistent tarchyarrhythmias and is characterized by ventricular systolic dysfunction and congestive heart failure. Tachycardia-induced cardiomyopathy is usually reversible via treatment. The cornerstone in the management of disease in these patients is to achieve a normal heart rate. We report a torsades de pointes during treatment of tachycardia-induced cardiomyopathy. Intravenous magnesium sulfate and potassium were administrated, but torsades de pointes was repeated. After overdrive right ventricular pacing, torsades de pointes was terminated. Careful monitoring of the QT interval and serum electrolyte and drug levels in such patients is warranted during treatment of tachycardia-induced cardiomyopathy.
박병선 ( Byeong-sun Park ),신도영 ( Do-yeong Shin ),윤수아 ( Su-a-yun ),박채원 ( Chae-won-park ),배민호 ( Min-ho-bae ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2
본 논문에서는 스마트 홈 기반 노약자 응급상황 탐지 및 대응 시스템을 설계하였다. 2 개의 레이다 센서를 활용하여 센서 데이터를 분석하고 분류하며, 사용자의 상태를 취침, 외출, 응급상황 총 3 가지 경우로 식별한다. AWS 서버의 데이터베이스를 통해 응급상황 및 낙상 감지 이력을 축적하여 맞춤형 서비스를 제공한다. 어플리케이션을 통해 응급상황 자동 신고 접수와 센서 오작동시 자동 신고 접수 수동 취소 기능을 제공하는 응급상황 탐지 및 대응 시스템을 소개한다.