시간의 흐름에 따른 핸드폰의 품질동태성에 관한 연구

윤성필(Sung-Pil Yoon),임성욱(Sung-Uk Lim),박만희(Man-Hee Park),조인희(In-Hee Cho) 한국엔터테인먼트산업학회 2010 한국엔터테인먼트산업학회논문지 Vol.4 No.3

본 연구는 선행연구에서 조사된 핸드폰의 고객요구속성을 Kano 모델의 품질특성에 적용하여 시간의 흐름에 따라 어떤 변화가 있는지를 살펴보고자 한다. 또한 고객들의 새로운 요구속성이 나타났는지도 함께 살펴보고자 한다. 많은 문헌과 선행연구에서 나타나고 있는 시간에 따른 품질특성의 이동이 매력적 품질에서 일원적 품질로 일원적 품질에서 당연적 품질로 변화하는 진부화(陳腐化)현상이 나타나는지도 함께 살펴보고자 한다. In this study, previous research (Sung-Uk Lim, 2004) surveyed in customer demand for mobile phones the quality characteristics of properties applied to the Kano model, the flow of time, depending on whether any changes will be discussed. In addition, our customers" new requirements will be examined along with the property map appeared. The movement of time-dependent quality characteristics appeared in many previous studies Obsolescence Phenomenon - from Attactive Quality Element to One-Dimensional Quality Element, from One-Dimensional Quality Element to Must-Be Quality Element - may appear be examined together.

성별에 따른 우울증 양상과 신경전달물질의 차이

윤서영(Seoyoung Yoon),장성만(Sung Man Chang) 대한생물치료정신의학회 2019 생물치료정신의학 Vol.25 No.1

Depression is almost twice as prevalent in women than men. Atypical symptoms, somatic complaints, and comorbid anxiety disorders are more common in women, whereas suicide and comorbid substance use disorders are more common in men. Previous studies have also reported gender differences in the efficacy of and tolerability to specific classes of antidepressants. Various psychosocial and biological factors have been proposed to explain the gender differences in clinical characteristics of depression. The predominant theory of depression pathogenesis is the monoamine hypothesis, and consequently, monoamine neurotransmitters have been the primary target of antidepressants. In the first section of this review, study findings of clinical differences in depression by gender are summarized. Then, we provide an overview of the findings from human and rodent studies of gender differences in serotonin, norepinephrine, dopamine, and glutamate neurotransmitter systems. Total level, rate of synthesis, and receptor profiles of neurotransmitters seem to differ by gender in the euthymic state, depressed state, and in responses to stress or antidepressants. Furthermore, these neurotransmitters interact with gonadal hormones and the hypothalamic-pituitaryadrenal axis, systems that innately exhibit gender differences. Although most of the studies conducted so far are limited to animal models and results of the studies are heterogeneous, growing evidence suggests that gender differences exist in neurotransmitter systems, which possibly leads to gender differences in depression. More intensive studies in this field are needed to build gender-specific treatment strategies.

Paraquat 중독환자의 초기검사로서 sodium dithionite를 이용한 소변내 paraquat검출의 임상적 의의

윤갑준,임경수,이진웅,김영식,이부수,박덕우,김선만,이강현,황성오,안무업 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Background : Mortality from paraquat intoxication depends upon plasma paraquat concentration. To know the severity of paraquat intoxication is important for directing therapeutic modality and predicting prognosis. Sodium dithionite test for urinary paraquat provides an easy and simple method to determine the severity of paraquat intoxication in emergency department. purpose : To determine whether the result urinary paraquat test by sodium dithionite can predict outcome in patients with paraquat intoxication in emergency department. Subjects : 48 patients(male 31, female 17, mean age 37 years) who had exposure to paraquat and presented within 24 hours after exposure. Result : Thirty five patients were positive in paraquat urine test and thirteen patients were negative. Clinical manifestations were more severe in positive patients than in negatives. Complication was much more in positives than in negatives. 28 of 35 patients(80%) in positives and 2 of 13 patients(15%) in negatives died. Conclusion : Positive test for urinary paraquat is associated with high mortality and morbidity from paraquat intoxication, and qualitative test for urinary paraquat by sodium dithionite is an useful method to determine the severity of paraquat intoxication in emergency department.

공구마멸 감시에 음향방출 신호를 이용하기 위한 연구

윤종학,여만구,김상헌 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.3

This study is focused on the prediction of appropriate tool life by clarifying the correlation between progressive tool wear and AE(Acoustic Emission) signals, while cutting stainless steel by end mill on te machining center. The results of this study were that RMSAE tends to increase linearly along with the incrase of the cutting speed, and it was more sensitive to depth of cut than to the variation of feed rate at the same cutting conditions, and RMSAE increases around 0.21mm flank wear hereby AE-HIT also increases. AE signals depend upon tool wear and fracture from the above results. Therefore, the AE signals can be utilized in order to monitor the tool condition.

음향방출을 이용한 엔드밀의 마멸검출에 관한 연구

윤종학,여만구,김동성,이호영 서울産業大學校 1995 논문집 Vol.42 No.1

This study is focused on the prediction of an appropriate tool life by clarifying the correlation between progressive tool wear and signals, when cutting SM45C by end mill in machining center. First of all, end mill have a problem that position of sensor sticking because it is revolution tool, I think that it can be gained specific character according to sticking sensor in the vise. Consequently, the following results have obtained: 1. Each cutting speed of feed rate over 0.1mm had a tendency to increase linearly according to the RMS. 2. The level of AE signal at the same cutting area was more sensitive to depth of cut than the variation of feed rate. 3. In the range of cutting during about 75min at cutting speed 27m/min flank wear turns up about 0.21mm, about 0.29mm in the case of about 65min at 33m/min, hereby RMS increased rapidly at 0.2mm flank wear, also AE-HIT and CUM-CNTS.

경흉부 심초음파로 조기 진단된 폐색전증 1예

윤성욱,김예리,정상만 건국대학교 의과학연구소 1998 건국의과학학술지 Vol.8 No.-

Pulmonary thromboembolism is the impaction of material into branches of the pulmonary arterial bed. The clinical manifestations are similar to those of other cardiopulmonary disorders, and thus, the diagnosis of pulmonary embolism may be delayed even in patients presenting with characteristic symptoms. Accurate early diagnosis and treatment are important because untreated in-hospital mortality is up to 30 percent whereas it is only 8 percent if appropriately treated. The confirmation of a pulmonary embolus depends on performing either a ventilation-perfusion scan or angiography. But, ventilation-perfusion scans are not sufficiently sensitive, and angiography is invasive and associated with complications. Also, both of these tests are time consuming. Therefore, a noninvasive method of early detecting pulmonary thromboembolism is important to carry out further invasive diagnostic tests. We experienced a case of pulmonary thromboembolism that had been treated successfully after early diagnosis by noninvasive method of transthorathic echocardiography, and presented it with a review of literature.

개에서 이중 결찰법을 통한 동맥관 개존증의 완치 예

윤헌영,정순욱,박희명,박철,정만복,김준영,한현정,황민,노병국,박상혁,장하영,박정윤 한국임상수의학회 2004 한국임상수의학회지 Vol.21 No.1

A ten months old, female Yorkshire terrier weighing 2.88 kg referred to veterinary teaching hospital of college of veterinary medicine, Konkuk University because of syncope, cough and dyspnea. First hematological and serum chemical test revealed thrombocytopenia, mild anemia, and increase of concentration of ALP (195 U/L). On 57 days later, second hematological and serum chemical test revealed polycythemia, increase of concentration of ALP (211 U/L), and Tchol (387 mg/dl). Right atrium enlargement, main pulmonary artery bulge and cardiomegaly (VHS = 11.5) were observed in radiographic findings. Ultrasonographic images showed both right and left ventricular dilation and turbulent flow between the descending aorta and the main pulmonary artery in color Doppler imaging. ECG showed left ventricular enlargement, SA block, and electrical alternant. Thoracotomy was performed through left fourth intercostal incision under isoflurane anesthesia. Patent ductus arteriosus was double ligated with 1-0 silk. Cough and dyspnea disappeared on 5 days after operation. Turbulent flow was not found in color doppler imaging of ultrasonography on 10 days after operation. Ten months later after the operation, syncope could not exist any more.

PSM을 적용한 반도체 산업에서의 재해예방 사례연구

윤용구,홍성만,손제성,박범 대한설비관리학회 2003 대한설비관리학회지 Vol.8 No.2

It is a semiconductor product industry womed out enormous of loss that happened to accident for during in production exist to leakage, fire, explosion, using to variable chemical material of application, treatment, storage. This is presented to that improvement example for study, research, investigation of PSM in semiconductor industry and so processed to follow as theory consideration for PSM in semiconductor industry. This study did the object of research that S company is point to appointment and so give a account of S company PSM contents, searching to conclusion of PSM and consideration of problem and injury prevention for PSM expansion. From now on, PSM of semiconductor-injury is bring up improvement of problem, large-scale -company of semiconductor.

아침형과 저녁형 사람에서 야간의 졸리움, 수행 및 체온의 비교

윤진상,국승희,신일선,신만식,최영,이무석,이형영 大韓睡眠-精神生理學會 1994 수면·정신생리 Vol.1 No.1

다양한 파장폭의 가시광선에 의해 중합된 복합레진의 미세경도와 변연누출도

박수만,이재용,한승렬,하상윤,신동훈 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.4

Several ways of curing are being tried to improve material's properties and reduce marginal gap. However, all are considering about the pattern of light intensity. It was noted from the preliminary study the change of light wavelength from filter chaning may give an impact on material's property and microleakage. The object of this study was to verify the effect of filters with various wavelength width on the microhardness and microleakage of composite resin; hybrid type of DenFil and submicron hybrid type of Esthet X. Composite resins were cured using 3 kinds of filter; narrow-banded(465-475 nm), mid-banded(430-470 nm), wide-banded(400-500 nm). After the estimation of microhardness, degree of dye penetration and the maximum gap from SEM evaluation were done between 4 groups that showed no difference in microhardness value of the lower surface. The results were as follows: 1. Adequate microhardness could not be gained with a narrow-banded filter irrespective of curing time. At the upper surface. DenFil should be polymerized with middle or wide-banded filter for 20 seconds at least, while Esthet X be cured with middle or wide-banded filter for 30 seconds at least to get similar hardness value to control group. 2. There was little dye penetration in enamel margin, but all dentin margins showed much more dye penetration irrespective of curing conditions. Although there was not statistical difference, groups cured with mid-banded filter for 40 seconds and with wide-width filter for 20 seconds showed relatively less dye penetration. 3. It was revealed from the SEM examination that group cured with wide-banded filter had the smallest gap without statistical significance. Spearman's rho test showed that the correlation between the results of dye penetration and SEM examination was very low. From these results, it could be concluded that curing with wide-width filter would be better than the other techniques. even though the curing technique using mid-width filter seems to have its own unique advantage.