Ni-ZnFerrite의 磁氣的 特性에 미치는 燒結온도의 영향

尹志洪,朴奎殷,金奎用 제주대학교 1982 논문집 Vol.14 No.-

Ni-Zn Ferrite는 1200℃이상의 온도에서는 소결성이 좋으며 Bi₂O₃를 첨가하여 소결한 것은 1250℃에서 최대투자율 2050을 얻었으며 보자력은 0.13 Oe로서 가장 낮은 값을 나타내었다. 그러나 주파수에 따른 초투자율은 높은 주파수 영역에서는 다른 조건에서 소결시킨 시료에 비하여 낮은 값을 가진 것으로 나타났다. 사용되는 주파수의 영역에 따라서 적절한 소결온도, 적절한 첨가물이 결정될 수 있을 것으로 예상된다. The magnetic properties of Ni-Zn ferrites with additive(Bi₂O₃;0.3wt%)and without additive have been measured. The maximum permeability is 2050, the initial permeability is 1538 at 1.55MHz and the coersive force is 0.130Oe.

Jack London의 자연으로의 회귀

윤지홍 동아대학교 인문과학대학 영어영문학과 1993 동아영어영문학 Vol.9 No.-

중·고등학교 급식종사자들의 위생관련 업무 수행도 분석

홍완수,윤지영 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.4

The purpose of this study was to develop methods for foodservice employees to perform by measuring their levels of sanitation and hygiene practices. The employees' sanitation and hygiene competency list for school foodservice was developed on the basis of the job standardization. The competency list was divided into three parts; (1) before starting the work, (2) during the work and (3) after the work. The levels of the employees' sanitation and hygiene practices were evaluated by dietitians and by the employees themselves. Most schools had conventional foodservice systems (83.4%), which were operated by contract management (94.8%). It was found that the highest practice level related to sanitation and hygiene before starting work, with the lowest levels observed after work. The item related to the cleaning and sanitizing of dishes had the lowest practice level score. Employees perceived their sanitation and hygiene practice after work to be worse than before starting and during work. The items of "Clean and sanitize all large stationary equipment after every use, and record equipment monitoring chart" and "Do not clean dishes and utensils in production area" had the lowest scores by employees. The scores of the employees were similar to the perception of the dietitians.

Cone-beam CT를 이용한 제II급 부정교합 아동의 상기도 형태에 관한 3차원적 연구

홍지숙,김대성,오경민,김윤지,이규홍,박양호 대한치과교정학회 2010 대한치과교정학회지 Vol.40 No.3

Objective: The aim of this study was to evaluate the volumes and areas of the upper airways in children with Class II malocclusion, using three dimensional cone-beam computed tomography (CBCT) and to compare the volumetric and cross-sectional measurements and cephalometric variables to investigate possible relationships between the upper airway and facial morphology. Methods: CBCT scans were obtained from 37 subjects (17 boys and 20 girls; average age, 11.02 years). The upper airway volumes and areas were measured, and compared with cephalometric variables. Results: The area of the PNS-posterior plane (SPP) was significantly smaller in the Class II malocclusion group (p < 0.05). Also, the volumetric and cross-sectional measurements were lower in Class II than in Class I malocclusion groups, although the differences were not significant between the two groups (p > 0.05). The Class II malocclusion group showed significantly smaller values of PFH, mandibular body length, pog to N perp and showed larger values of FMA, ANB, and facial convexity than the Class I malocclusion group. The volume of the upper airway in front of PNS point (WN) showed negative correlation with ANB (p < 0.05). Conclusions: The Class II malocclusion group had a narrower upper airway associated with a decreased posterior facial height and a divergent growth pattern than the Class I malocclusion group. 성장기 아동의 상기도 협착은 두개안면 성장에 영향을 미칠 수 있다. 본 연구는 3차원 cone-beam computed tomography (CBCT)를 이용하여 제II급 부정교합 아동의 상기도 부피 및 단면적 계측치와 측모두부계측치를 비교하여 상기도와 안면 형태와의 연관성을 알아보고자 하였다. 37명의 아동(남자 17명, 여자 20명, 평균 연령 11.02세)의 CBCT를 촬영하였다. 연구 결과, 상기도의 PNS-posterior plane에서의 단면적(S_(PP))은 제II급 부정교합군에서 유의하게 작았다 (p < 0.05). 상기도 부피 계측치는 제II급 부정교합군에서 제I급 부정교합군보다 작았으나, 두 군 간 통계적으로 유의한 차이는 없었다. 제II급 부정교합군은 후안모고경(PFH), mandibular body length (p < 0.05), Pog to N perp (p < 0.01)에서 제I급 부정교합군보다 유의하게 작은 값을 보였고, FMA (p < 0.05), ANB, facial convexity (p < 0.01)는 유의하게 큰 값을 보였다. 제II급 부정교합군의 PNS 전방의 상기도 부피(W_(N))는 ANB difference 각도와 음의 상관관계를 보였다 (p < 0.05). 제II급 부정교합 아동은 상대적으로 좁은 상기도 부피를 가지며 이에 따른 감소된 후안모고경(PFH)과 하악골의 divergent한 안면 성장 양상을 보였다.

여행업 종사원의 데이터베이스 마케팅 인식에 관한 연구

이윤섭,박지홍 문화관광연구학회 2001 문화관광연구 Vol.3 No.3

The purpose of this study is to present some desirables to build relationship with customer of Travel agency. In the future, the success and failure of travel agencies have to achieve effectively the corporate goals, positively coping with the corporate environmental changes in the transformation of the professional management system with the strong international responsiveness. In this respect, They have to concentrate on the customers focused on the environments and give the priority of customer's satisfaction in the process of carrying out the management. In travel agency management the importance of travel agency must be evaluated to form, develope and maintain building relationship with customer. It is possible for customer database marketing to attain the aim of marketing thru every activity by the stage of building relationship with customer, keeping relationship with customer, and interest maximization of both travel agency and customer.

혈액투석 환자에게서 발생한 재생불량성 빈혈 1예

정지용,윤나라,강대웅,오종찬,장재현,선길홍,박경희,정종훈,김현리 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

Aplastic anemia is a disease characterized by pancytopenia in the peripheral blood and hypocellular bone marrow with the fatty infiltration. The causes of the acquired aplastic anemia were usually related to drugs and immune-related diseases. A 34-years old man was admitted due to general weakness. He has been going hemodialysis for 2 years because of end stage renal disease (ESRD) due to chronic glomerulonephritis. At admission, laboratory tests showed hemoglobin 6.2 g/dL, hematocrit 18.0 %, WBC 5,710mm (neutrophil 71.8%, lymphocyte 19.1%, monocyte 5.9%), reticulocyte 1.9%, platelet 93,000/mm, Fe 12.8 ug/dL, TIBC 204 ug/dL, ferritin 941.47 ng /ml, haptoglobin 0.72 g/L, vitamin B12 508.17 pmol/L, folate 24 ng/mL, total protein 6.54 g/dL, albumin 3.76 g/dL, Alk. pohsphatase 79 IU/L, AST 30.0 IU/L, ALT 39.7 IU/L, total bilirubin 0.57 mg/dl, BUN 79.4 mg/dl and creatinine 10.18 mg/dl. Peripheral blood smear showed the normocytic normochromic anemia with anisocytosis. Anemia was diagnosed but it was irresponsive to the recombinant human erythropoietin (EPO) and blood transfusion. In the bone marrow aspiration smear were there the hypoplastic myeloid and erythroid precursors. The bone marrow biopsy section showed the hypoplasia of all components (10-20%) and the fatty infiltration. We have experienced one case of the idiopathic aplastic anemia in a patient going through hemodialysis and we just report it with documentary records. 저자들은 혈액 투석 중인 환자에서 약물, 면역계 이상등의 원인을 발견할 수 없었음에도 재생 불량성 빈혈이 발생한 1예를 경험하여 문헌 고찰과 함께 보고하는 바이다.

골수염으로 발현된 재발성 콕시디오이데스 진균증 1예

백지현,박은영,정윤숙,홍재원,채윤태,진성준,최희경,신소연,한상훈,진범식,김창오,최준용,송영구,조남훈,김준명 대한감염학회 2009 감염과 화학요법 Vol.41 No.4

Coccidioidomycosis is a fungal infection that results from inhaling the airborne arthroconidia of the Coccidioides species. It is an endemic disease in the southwest part of North America and rarely diagnosed in Korea. As tourism to endemic areas and the number of immunocompromised patients have been increasing, the incidence of this infection has increased in non-endemic areas. Treatment is usually successful with antifungal agents; however, recurrence is common. It is difficult to decide when to discontinue the antifungal treatment especially in non-endemic areas where doctors are not familiar with the disease. We report a case of recurrent coccidioidomycosis manifesting as osteomyelitis after the treatment of the patient for disseminated coccidioidal infection. The complement fixation test was a useful tool for the assessment of patient response and to evaluate suspected recurrence.

구형도마와 신형도마에서 Yeo2동작의 운동학적 변인의 비교 분석

여홍철,김윤지 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

The purpose of this study was to examine the difference between Yeo2 with old model vault and Lu Bin with new model vault by three dimensional image analysis method. From this analysis, I arrived at the following conclusions. 1. Lu Bin with new model vault took longer phase time and higher peak-height comparing to Yeo with old model vault. 2. The horizontal and vertical velocity of the old model vault was similar to the new model vault at tine time of touching down and taking off the board. The Lu's hip and shoulder joint angles were bigger than the Yeo's at the time of touching down and taking off the board.

정신분열증 환자에서 주관적 음성증상경험의 임상적 의의

김지웅,김찬형,구민성,손석한,박진철,최문종,이은철,윤도준,이홍식 대한신경정신의학회 1999 신경정신의학 Vol.38 No.1

연구목적 : 현재까지 정신분열증의 음성증상평가는 주로 객관적인 평가에만 의존해왔기 때문에, 환자들이 주관적으로 직접 경험하는 음성증상의 평가는 경시된 경향이 있었다. 그러나 실제 많은 정신분열증 환자들은 음성증상을 자가하고 있다. 특히, 개관적인 양성 및 음성증상이 관찰되지 않는 경우에도 환자 본인은 음성증상으로 괴로워한다는 이전의 연구보고들이 있었다. 따라서 저자들은 주관적인 음성증상경험과 개관적인 양성증상 및 음성 증상, 우울증상, 불안증상, 추세외로증상과의 상관성을 알아봄으로써 정신분열증의 정신병리에 있어 주관적 음성증상의 존재를 규명하고, 정신분열증 정신병리의 발생기전을 유추해보며 이차적 음성증상과의 관계를 규명하고자 하였으며. 이러한 연구가 정신분열증 정신병리를 이해하는데 도움을 줄 수 있을 뿐 아니라 환자를 공감적으로 이해하는데 도움을 줄 수 있을 것으로 생각되어 본 연구를 시행하였다. 방 법 : DSM-Ⅳ 진단기준의 정신분열증 진단기준에 해당하는 환자를 대상으로 하였다. 주관적인 음성증상의 평가를 위해서 Scale for the Subjective Experience of Negative Symptoms : Korean version(KSENS)을 이용하였고, 개관적인 정신분열증 정신병리의 평가는 Positive and Negative Syndrome Scale(PNASS)를 이용하였다. 우울증상, 불안증상, 추세외로증상의 평가를 위해서 각각 Hamilton Rating Scale for Depression(HAM-D), Hamilton Rating Scale for Anxiety(HAM-A), Extrapyramidal Symptoms Rating Scale(ESRS)을 이용하였다. 각 정신병리척도 점수간의 상관성은 Spearman 상관계수를 이용하여 분석하였다. 결 과 : K-SENS 24항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 PANSS 양성척도점수 사이에는 유의한 상관점이 있었으며 (r=-0.40, p〈0.05), 양성증상 중에서도 특히 과대성(r=-0.46, p〈0.05), 의심/피해(r=-0.34, p〈0.05), 적개심(r=-0.52, p〈0.05) 등의 증상과 유의한 상관관계를 보였다. K-SENS 24 항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 PANSS 전체점수(r=-0.25, p〉0.05), PANSS 음성척도점수(r=-0.20, p〉0.05), PANSS 일반정신병리척도(r=-0.08, p〉0.05),와는 각각 유의한 상관성이 없었다. K-SENS 24항목 중에서 환자가 이를 불편한 것으로 경험하고 있는 항목의 비율과 HAM-D 점수(r=-0.01, p〉0.05), HAM-A 점수(r=-0.11, p〉0.05), ESRS 총점(r=0.34, p〉0.05)은 각각 유의한 상관성이 없었다. 결 론 : 본 연구결과에서, 정신분열증 환자들이 불편한 것으로 경험하는 주관적 음성증상과 과대성, 의심/피해, 적개심 같은 양성증상은 역상관관계가 있었으며, 이러한 결과를 바탕으로 양성증상이 주관적으로 불편하게 느끼는 음성증상에 대한 가능성과, 혹은 양성증상이 심할 경우, 이에 압도되어 음성증상을 주관적으로 느끼지 못할 수 있다는 가능성이 시사되었으며, 향후 종적인 연구를 통해 이를 규명해 볼 필요성이 제시되었다. 주관적인 음성증상경험과 우울증상, 불안증상, 추세외로 증상과는 상관성이 없는 것으로 나타나서 이들 증상과는 독립적인 증상임을 시사한다. Objective : Since the evaluation of negative symptoms has depended on the clinician's objective observation, the patients subjective experience of negative symptoms has been neglected. However, in fact, a lot of patients are aware of their negative symptoms. There are several reported suggesting that patients suffer from the subjective experiences of their deficit symptoms, even though the objective positive and negative symptoms cannot be observed. Under these circumstances, we have attempted this study with the idea that it would be helpful in understanding the psychopathology of schizophrenia. Also it would help clarifying the relationship between subjective experience of negative symptoms and objectives positive and negative symptoms, depression anxiety symptoms, and extrapyramidal symptoms. Method : All the 37 patients satisfied the diagnostic criteria of DSM-Ⅵ for schizophrenia. The subjective experiences of negative symptoms were evaluated using Scale for the Subjective Experience of Negative Symptoms : Korean version(KSENS), and for the depression, anxiety, extrapyramidal symptoms, we used Hamilton Rating Scale for Depression(HAM-D), Hamilton Rating Scale for Anxiety(HAM-A), and Extrapyramidal Symptoms Rating Scale(ESRS). The correlation between each psychopathology was tested by calculating Spearman correlation coefficient. Results : There was a significant correlation between the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and the score of PANSS positive subscale(γ=-0.40, p〈0.05), Among the positive symptoms, grandiosity(γ=-0.46, p〈0.05), suspiciousnes/persecution(γ=-0.34, p〈0.05), and hostility(γ=-0.52, p〈0.05) showed a significant correlation with the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS. There was no significant correlation between the ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and PANSS total score(γ=-0.25, p〉0.05), or negative subscale score(γ=-0.20, p〉0.05), or general psychology subscale score(γ=-0.08, p〉0.05), respectively. There was no significant correlation between ratio of items experienced as uncomfortable symptoms among 24 items of K-SENS, and HAM-D(γ=-0.01, p〉0.05), or HAM-A(γ=-0.11, p〉0.05), ESRS(γ=0.34, p〉0.05), respectively. Conclusion : These revealed that the negative correlation between the subjective negative symptoms experienced as an uncomfortable ones and the objective symptoms such as grandiosity, suspiciousness/persecution, and hostility. From these results, the possibility that positive symptoms are used as a defense to hide from the negative symptoms because they are overwhelmed by their positive symptoms, is suggested. These results also suggest that subjective experiences of negative symptoms are independent from depression, anxiety and extrapyramidal symptoms.

상지 단순반복작업 근로자의 수근관 증후군 유병률에 관한 조사

손지언,장태원,김윤규,홍영습,정갑열,김동일,이강진,하남진,김상범,김준연 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.3

목적 : 본 연구는 수근관 증후군의 발생위험이 높은 작업형태에 종사하는 상지 단순반복작업근로자로서 육류 및 어류 가공 사업장과 목재소 근로자에서 근전도검사를 이용하여 수근관 증후군의 유병률을 조사하고자 하였다. 방법 : 상지 단순반복작업근로자로서 육류 및 어류 가공 사업장 근로자 69명과 목재소 근로자 17명을 실험군으로, 관리직, 경리, 경비등 상지의 단순반복작업이 없는 근로자 28명을 대조군으로 선정하여, 작업적 및 병력조사, 이학적 검사와 근전도검사를 통해 수근관 증후군의 유병률을 조사하였다. 결과 : 수근관 증후군의 유병률은 육류 및 어류 가공 사업장과 목재소에서 각각 26.09 % (18명)와 29.41 %(5명)로 조사되었으며, 육류 및 어류가공사업장과 목재소 근로자를 '7년 이상과 미만의 작업기간'으로 층화하여 비교한 결과 '상지부위의 통증 호소 유무', 'Visual Analogue Scale(VAS: 총 10점) 4점 이상 여부', 'Tinel teat 양성 유무', 'Phalen test 양성 유무'는 모두 단기 작업근로자군에서 양성의 빈도가 증가되었고 '수근관 증후군 유무'는 장기작업근로자군에서 양성의 빈도가 증가되었다. 결론 : 육류 및 어류 가공 사업장과 목재소의 수근관 증후군 유병률은 각각 26.09 %와 29.41 %로 육류 및 어류 가공 사업장과 목재소는 1996년 OSHA가 지정한 바와 같이 위험한 작업요인이 있는 작업장으로 분류하여 관리되어야 할 것으로 생각된다. Objectives : This study was carried out to survey on the prevalence of Carpal Tunnel Syndrome(CTS) in high risk jobs(meat and fish processing plant and wood plant), by application of Nerve Conduction Study(NCS), a confirmatory diagnostic method. Methods : Experimental group was 69 workers sampled from meat and fish processing plants and 17 workers sampled from wood plants, who were simple, repetitive workers using upper extremities and control group was 28 workers sampled from managers, secretaries and keepers. All employees were examined through work history, physical examination and NCS. Results : 18 workers(26.09%) in meat and fish processing plants, and 5 workers(29.41%) in wood plants had compatible findings to NIOSH diagnostic criteria for CTS. The experimental group had more symptoms (complaint of upper extremities, Visual Analogue Scale ≥4(VAS: total 10 point)), signs(Tinel and Phalen test) and prevalence of CTS than control group(p<0.05). The prevalence of symptoms and signs were higher in short term workers(<7 years), but the prevalence of CTS was higher in long term workers(≥7 years). Conclusions : The prevalence of CTS in meat and fish processing plant and wood plant were 26.09% and 29.41% respectively. Authors propose that meat and fish processing and wood plants should be managed as a risk job category which were designated by OSHA in 1996