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최소자승법을 이용한 다수 베타 방출 핵종 혼합물의 방사능 분석
선광일,남욱원,공경남,김창규,이동명,이상국 대한방사선 방어학회 2001 방사선방어학회지 Vol.26 No.4
베타선 스펙트럼의 최대 에너지가 확실하게 구별되는 2개의 핵종만을 포함하는 혼합시료의 경우에는 최대 에너지가 다르다는 점을 이용하여 손쉽게 각 핵종의 방사능값을 측정할 수 있다. 그러나 3개 이상의 베타 방출 핵종이 포함된 혼합물에 대해서는 각 핵종의 스펙트럼이 서로 겹치기 때문에 이러한 방법으로 구해진 방사능값은 신뢰도가 떨어지게 된다. 따라서, 본 연구에서는 최소자승법을 이용하여 혼합물의 중첩된 베타선 스펙트럼을 각각 분리 정량분석할 수 있는 밥법을 제시하였다. 또한, 실제로 4개의 베타 방출 핵종 ^3H, ^14C, ^16Cl, 90Sr)이 혼합된 사료를 조제하여 본 분석법을 검증한 결과 최고치 Reference value)와 분석치가 7% 이내에서 잘 일치함을 보였다. It is possible to count and perform quench correction on two β-label samples so long as the maximum β-energies are sufficiently different. However, when the coventional technique is applied to the radioassay of a mixture of more than three nuclides, the reliability of the activiteis determined is considerably reduced, resulting from the large overlapping of liquid scintillation pulse height distributions of ezch nuclide. A technique that allows the activities of multiple β-labeled samples to be radioassayed was proposed by using the least square method. The technique was applied to mixture samples of ^3H, ^14C, ^16Cl, and ^90Sr. The analytical values were in good agreement with the reference values within 7% relstive error.
마이크로 컴퓨터에 의한 심전도 데이타 압축 알고리즘의 개선
이명호,이경중,황선철,정혁구 연세대학교 대학원 1988 延世論叢 Vol.24 No.-
This paper represents an improved ECG data reduction algorithm which is very useful for real time ECG analysis based-on microcomputer. In order to increase data reduction rate of Turning Point(TP), existing real time data reduction algorithm. The results obtained from the improved Modified Turning point(MTP) data reduction algorithm applied to three different pattern ECG signals. (1) The average data reduction rate of MTP algorithm is 67%, which is increased by 17% than that of TP algorithm. (2) The average percent rms difference(APRD) which is a normalized value that indicates the error between two signals is 9.4% for TP algorithm, while the APRD of MTP algorithm is 6.2% for MTP algorithm. It means that the PRD can be improved by 3.19. Therefore, it gives more excellent resolution than that of TP algorithm.
양경환,정경섭,이종선,권소진 충북대학교 건설기술연구소 2003 建設技術論文集 Vol.22 No.1
There has been an increased interest in the Longitudinally Profiled(LP) plate as a structural element for bridges, due to its advantage to efficiently distribute the sectional force applied to the structure. The advantage also includes the reduction of weight and the number of welding points. The LP plate was originally developed in Europe, and the application has since increased rapidly on steel bridges in Europe and Japan. Though widely used internationally, much of the study for the structural application of the LP plate is yet to be performed. In this paper, the workability of the LP plate was evaluated by the tests for tensile and bending. In addition, the stability was reviewed and verified by a comparison between experimental and analytical results. The economical efficiency was also examined for different section types by finite element analysis.
공명선,조준상,이학민,김경호 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1
고분자 습도센서의 감습재료로 이용하고자 4-vinylpyridine (4-VP) 과 methylmethacrylate(MMA) 의 공중함체를 전극에 도포한 후 α, ω-dihaloalkane으로 4 차 암모늄화시킨 후 습도변화에 따른 전기저항을 측정한 결과 소수성 모노머인 MMA의 양이증가할 수록 전기저항이 증가하였으며, 또한 α, ω-dihaloalkane에 의한 4차 암모늄화 반응시간에 따라서도 전기저항의 크기 및 감습막의 안정성에 차이가 있음을 알 수 있었다. In order to for a humidity sensitive material of polymeric humidity sensor, a copolymer of 4-vinylpyridine (4-VP) and methylmethacrylate (IBA) is coated on the electrode and then 4 quartermization by α, ω-dihaloalkane, and thereafter measured the electrical resistance due to humidity variation. As a result, the more content of MMA which is a hydrophobic monomer is increased, the more property of electrical resistance is increased. Also, according to the reaction time in 4 quarternization by α, ω-dihaloalkane we can see the diferences of the magnitude of electrical resistance and the stability of humidity -sensitive membrane.
사회인지론에 근거한 낮병원 정신질환 입원환자 대상비만 예방 및 관리를 위한 영양교육 효과평가
한민지,이지연,이해연,한은경,최경순,김희선 순천향대학교 기초과학연구소 2021 순천향자연과학연구 논문집 Vol.27 No.1.2
Mental illness such as schizophrenia, bipolar disorder and depression have shown high prevalence of obesity. According to the previous studies, nutrition education has therapeutic effects on patients, however mentally ill patients rarely have opportunities of long term nutrition education. In this study, nutrition education based on the social cognitive theory was conducted. Patients with mental illness received education program once a month during 18 months in a day hospital. Fifteen patients were included and divided into two groups according to the attendance rate. Results showed that the group attended the education more than 10 times showed weight loss, while the group less than 10 times showed weight gain. Five long-term hospitalized patients gained weight during one year prior to the nutrition education, but showed weight loss during one year with the nutrition education. Regardless of the number of attendance, the group of BMI≥30kg/m2 showed weight loss. Although this study has several limitations and did not obtain a statistically significant results, it confirmed the necessity of providing clinical nutrition services including nutrition education for mentally ill patients.
Lee Ji Ye,Baek Jung Hwan,Ha Eun Ju,Sung Jin Yong,Shin Jung Hee,김지훈,Lee Min Kyoung,Jung So Lyung,Lee Young Hen,Ahn Hye Shin,Yoon Jung Hyun,Choi Yoon Jung,Park Jeong Seon,Lee Yoo Jin,Choi Miyoung,Na Don 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.5
Imaging plays a key role in the diagnosis and characterization of thyroid diseases, and the information provided by imaging studies is essential for management planning. A referral guideline for imaging studies may help physicians make reasonable decisions and minimize the number of unnecessary examinations. The Korean Society of Thyroid Radiology (KSThR) developed imaging guidelines for thyroid nodules and differentiated thyroid cancer using an adaptation process through a collaboration between the National Evidence-based Healthcare Collaborating Agency and the working group of KSThR, which is composed of radiologists specializing in thyroid imaging. When evidence is either insufficient or equivocal, expert opinion may supplement the available evidence for recommending imaging. Therefore, we suggest rating the appropriateness of imaging for specific clinical situations in this guideline.
How could you management in the class III obese patient to do Gynecologic Laparoscopic surgery?
( Seon Mi Lee ),( Hyun Kyoung Seo ),( Jae Yoon Jo ),( Hee Jung Lee ),( Yeon Jee Lee ),( In Ae Cho ),( Jeong Kyu Shin ),( Won Jun Choi ),( Jong Hak Lee ),( Won Young Paik ),( Soon Ae Lee ) 대한산부인과학회 2020 대한산부인과학회 학술대회 Vol.106 No.-
All over the world, obese people was twice since 1980. In 2014, over 1.9 billion adults were overweight, including over 600 million obese people. Obesity is worldwidely critical problem, and the people have high risk of morbid conditions such as hypertension, diabetes mellitus, hypercholesterolemia, obstructive sleep apnea, and malignancies including endometrial cancer and breast cancer. If obese patients is operated, the surgeons have to prepare more carefully in operation. Also, post operation complications including surgical site infection, venous thrombus and wound complications are more prevalent in them than normal-weight patient. The same applies to Gynecologic surgery. We reported the case of laparoscopic surgery in class III obese woman (class I obesity is defined as a BMI of 30 to less than 35; class II obesity is defined as a BMI of 35 to less than 40; and class III obesity is defined as a BMI of 40 or greater, is considered morbid obesity) because Endometrial hyperplasia without atypia was diagnosed by dilatation and curettage of uterus. In the preoperative stage, basically, we performed chest x-ray, an electrocardiogram, echocardiography and laboratory evaluation were also performed. In the intraoperative stage, She was posted the HELP (head elevated laryngoscopy position) using blankets under back, shoulders and the head and neck to provide sufficient lift for airway visualization. She underwent laparoscopic hysterectomy with bilateral salpingo-oophorectomy, the surgery finished well. Although, The patient was discharged without any complication at 4 days after surgery, She re-entered hospital due to operation wound problem. After additional treatment such as dressing, antibiotics medications, the wound healing is finished. The more obese patients, the more doctors face same problems as above. Therefore, Gynecologic surgeons should have the knowledge of care and guidelines for preoperative, intraoperative and postoperative management.