청소년의 스마트폰 중독과 우울 및 불안과의 관계

김경은,김필송,민주연,박수경,신서인,이지은,정해인,조호정,최정원,최정인 이화여자대학교 간호과학대학 2013 이화간호학회지 Vol.- No.47

Purpose: The purpose of this study was to investigate the relationships between the degree of smart phone addiction among adolescents and their depression and anxiety levels. Method: In this study, 379 high school students were selected using the convenient sampling method. The instruments used for this study were smart phone addiction measure, the CES-D (Center for Epidemiological Studies-Depression Scale), and the STAI (State-Trait Anxiety Inventory). Data were analyzed using the SPSS 20.0 program with descriptive statistics, t-test, ANOVA with Scheffe test, and Pearson’s correlation coefficient. Result: The mean score for smart phone addiction was 40.45±17.27, depression was 36.56±9.58, state anxiety was 44.00±9.61, and trait anxiety was 45.70±9.75. There were significant differences between the degree of smart phone addiction and the following variables: gender (t=-4.953, p<.001), hours of smart phone use per day (F=12.259, p<.001), types of frequently used features (F=3.485, p=.008), and satisfaction level for smart phone (F=5.18, p<.001). There were statistically significant relationships (p<.001) among degree of smart phone addiction, depression level, and state and trait anxiety levels. Conclusion: The results of this study suggested that there was a significant relationship between smart phone addiction and mental health, specifically, depression and anxiety among adolescents. Further research is needed to develop nursing strategies to provide care for adolescents who frequently utilize smart phones.

디젤 乘用車輛에서 DPF 條件에 따른 極微細粒子의 排出 特性에 關한 硏究

鄭珉元,崔源鶴,柳鍾植,李海喆,車京玉 明知大學校 産業技術硏究所 2008 産業技術硏究所論文集 Vol.27 No.-

Recent1y, the nano-PM(Particulate Matters) number concentration emitted by diesel internal combustion engine has focused on attention because this nano-PM is suspected being hazardous of human health. In this study, the PM of the diesel passenger vehicles were investigated by number concentration. A condensation particle counter (CPC) system was used to measure the particle number concentration and size of diesel exhaust particles at the end of dilution tunnel during the NEDC(ECE15+EUDC) vehicle test mode using light-duty diesel passenger vehicles with DPFs. As a research result, the characteristic of DPF performance about diesel nano-particle number concentration and size distribution was investigated in this study.

응급실로 내원한 장중첩증의증 환아의 진단방법에 대한 임상적 고찰

원형섭,박정배,표창해,김형수,박철완,이근 대한응급의학회 1995 대한응급의학회지 Vol.6 No.2

The purpose of this study is to evaluate the appropriate diagnostic methods for the patients with suspected intussusception. Intrssusception is a state that a portion of alimentary tract is telescoped into a segment just caudad to it, and has a characteristic symptoms of cyclic irritability, vomiting, bloody stools and palpable mass, It is the most common cause of acute or acquired intestinal obstruction in infants and children, and needs early diagnosis and immediate treatment. Authors reviewed retrospectively medical records of 411 infants & children with suspected intussusception from January 1, 1992 to December 31, 1994 and report the results with literature reviews. The results were as followings; 1) 263 cases were definite intussusception(DI) out of 411 suspected intussusception(SI). 2) The male to female ratio was 2.3 : 1 in SI and 2.8 : 1 in DI. 3) The distribution of age revealed that 85% of SI and 84% of DI were under 24 months old, and the most common age was 8 months in SI and 10 months in DI. 4) There were upper respiratory infection in 84 cases(2)%), gastroenteritis in 32 cases(8%) and bronchiolitis in 8 cases(2%) as preceding diseases. 5) The simple X-ray showed gaseous bowel distension in 212 cases(52%). 6) The most common symptoms and signs were cyclic irritability and abdominal pain(94%), bloody stools(72%), palpable abdominal mass(47%), in order. 7) Of 411 patients, 252 cases(61%) were diagnosed and treated by air enema(228 cases) and/or exploration(24 cases). Among 296 cases(72%) who showed bloody stools in digital rectal examination and glycerin enema, 245 cases(83%) were confirmed as intussusception through air enema and/or operative intervention, and that corresponds to 93% of DI. 8) Intestinal perforation as complication occurred in 3 of 393 cases who underwent air and barium enema, but all of them recovered without any sequelae after operation. Conclusively, it is thought that air enema preceded by digital rectal examination and glycerin enema is safe and useful method in diagnosis and treatment of infants and children with SI.

콜레라독소의 피하투여에 의한 생쥐의 림프절 및 비장내 B 및 T 림프구의 분포변화

이원규,박낙진,김종원,허영범,김정혜,안희경 대한해부학회 1995 Anatomy & Cell Biology Vol.28 No.2

복수의 자율이동로봇의 협조운동에 관한 연구

정원갑,최유식,서호철,이석규,이달해 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.2

This paper proposes a fuzzy algorithm for cooperative behaviors of multiple autonomous mobile robots. Each robot makes decision of his behavior based on the information obtained by ultrasonic sensors to measure the position and angles of other robots. To enhance the industrial applicability of the suggested algorithm, we add disturbances of error angle caused by wheel steering when autonomous mobile robot navigates toward next destination point. This algorithm uses the position and velocity information of both the nearest robot and other robots within the detective radius of sensor with different weighting. Based on the fuzzy rule table and fuzzy inference, we obtain the rotational angle of the robots. The effectiveness of the proposed algorithm is shown by some computer simulations where a group of mobile robots encircles with equi-interval. In addition each robots is given weighting value to avoid the wall. Finally, the suggested algorithm shows that the more robots exist, the more effective it is.

디젤엔진排出에서 나노PM 粒子計測用 凝縮核개수기(CPC) 特性에 關한 比較解析

鄭珉元,崔源鶴,柳鍾植,李海喆,車京玉 明知大學校 産業技術硏究所 2008 産業技術硏究所論文集 Vol.27 No.-

Recently, the nano-PM 's number concentration emitted by diesel internal combustion engine has focused on attention because this particulate matters are suspected being hazardous of human health. In this study, the particulate matters (PM) emissions of these vehicles were investigated by number concentration. A condensation particle counter (CPC) system was applied to measure the particle number and size concentration of diesel exhaust particles at the end of dilution tunnel along the NEDC(ECE15+EUDC) vehicle test mode using TSI 3010D and HCT 4312 CPC. As the research result, the characteristic of CPC comparison diesel nano-particle number and size distribution was investigated in this study.

한방병원에서 가정의학과 진료 내용 분석

원진숙,신선호,김혜정 圓光大學校 醫科學硏究所 1998 圓光醫科學 Vol.14 No.2

Background: Recently social requirement for collaborated treatment of medical practice with oriental medicine has been increasing. This study is designed to provide the guidance of role of family medicine physician in oriental medicine hospital to help the establishment of interdepartmental cooperation between western and oriental medicines. Methods: Medical records of a total 973 patients administered in Chonju Oriental Medical Hospital of Wonkwang University from January Ito June 30 were reviewed. Data including sex, age distribution, periods of administration, past history, major clinical manifestations, diagnosis, laboratory tests, medications were collected and expressed as a percentage. The classification of Diseases was made according to ICPC. Results: Of 973 patients, sex ratio was 1:1.4 with female predominance and age distribution was highest in fifties and sixties (48%). Past history was dominated in cardiovascular disease (30.1%), postoperative sequele (16.4%) and diabetes (12.2%). Chief complains were ordered in frequency as arthralgia and myalgia (42%), hemiplegia (26%), dysphagia (17%), headache (13.8%), dizziness and vertigo (11.5%). Major diagnoses were cerebrosclerosis (39.7%), HNP (21.4%), cerebral hemorrage (11.2%) and arthritis (8.79%). Diseases of the administered patients were classified as cardiovascular (50.8%), musculoskeletal (31.8%), gastrointestinal (6.2%) and nervous systems. Conclusion: The main categories of the patients who were aided by family medicine physician in oriental medicine hospital were chronic debilitating diseases including cardiovascular disease and diabetes. To establish an effective collaboration of family medicine physicians in oriental medicine hospital, the doctors needed expert skills for treatment of supportive cares of chronic degenerative diseases and their complications.

cis-platin에 의한 급성구토예방의 Dexamethasone의 4가지 정주량의 비교

김원,강지은,서영선,이동민,서정균,신병철,정기영,박유환,정춘해 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.1

B5-hydroxytryptamine _3수용체(5-HT_3) 길항제와 dexamethasone의 동시투여가 cis-platin에 의한 급성 구토를 막는데 가장 효과적이다. 그러나 현재까지 가장 적절한 정주dexamethasone의 용량이 알려져 있지 않았다. 이에 dexamethasone의 4가지 다른 용량을 투여하여 그 효과를 비교하였다. 환자는 임의 추출되어 cis-platin 투여 45분전에 15분 동안 정주로 각각 dexamethasone 5, 10, 15, 20 mg을 투여 받았다. cis-platin 투여 30분전에는 ondansetron 8 mg이 부가하여 정주 되었다. 1999년 3월부터 2000년 2월까지 54명의 환자가 연구에 등록되어졌고 53명의 환자가 연구 대상으로 실험에 4군 (dexamethasone 5 mg 13명, 10 mg 14명, 15 mg 13명, 20 mg 13명)으로 나뉘어 평가 되어졌다. 급성구토와 구역질의 완전한 예방은 dexamethasone 5 mg을 투여 받은 환자에서 각각 69.2%, 60.9%, dexamethasone 10 mg을 투여 환자에서 69.1%, 61%, dexamethasone 15 mg 투여 환자에서 78.5%, 66.9%, dexamethasone 20 mg을 투여 환자에서 83.2%, 71.0%로 나타났다. 구토로부터 완전한 예방은 dexamethasone 20 mg을 투여 환자에서 5, 10 mg을 투여 환자와 비교하여 높았고, dexamethasone 15 mg을 투여 군에 비교하여서는 약간 우수한 효과만 있었다. 구역질으로부터의 완전한 예방도 월등한 것은 아닐지라도 20 mg을 받은 환자에서 높았다. 항 구토 치료는 특별한 불편 없이 조절되었고, 부작용의 발생에서 4가지그룹간에는 커다란 차이가 발견되지 않았다. Dexamethasone의 20 mg 정주양이 cis-platin으로 인한 급성구토를 예방하는데 가장 효과적인 예방량으로 사료되어진다. Background and objective: A 5-hydroxytryptamine _3(5-HT_3) receptor antagonist plus dexamethasone is the most efficacious antiemetic prophylactic treatment for the prevention of cis-platin induced acute emesis, but the optimal intraveous (Ⅳ) dose of dexamethasone is unknown. This prompted us to perform a randomized, double-blind, dose-finding study that compared four different doses of dexamethasone. Materials and Methods: Patients were randomized to receive dexamethasone, either 5, 10, 15, 20 mg, administered by 15-minute Ⅳ infusion 45 minutes before cis-platin. Ondansetron 8 mg was added to dexamethasone and was administered Ⅳ 30 minutes before cis-platin. From March 1999 to February 2000, 54 patients were enrolled onto the study and 53 were assessable according to the intention-to-treat principle (13 patients received 5 mg; 14 patients, 10 mg; 13 patients, 15 mg and 13 patients, 20 mg of dexamethasone). Results: Complete protection from acute vomiting and nausea was achieved by 69.2% and 60.9% of patients, respectively, who received 5 mg of dexamethasone, by 69.1% and 61.0% of those who received 10 mg, by 78.5% and 66.9% of those who received 15 mg, and by 83.2% and 71.0% of those who received 20 mg of dexamethasone. Complete protection from vomiting was significantly superior in patients who received 20 mg compared with those who received 5 and 10 mg of dexamethasone (P<05) and was superior, but not significantly, compared with those who received 15mg. Complete protection from nausea was superior, but not significantly, in patients who received 20 mg of dekamethasone. Multifactorial analysis confirmed these results. Antiemetic treatment was well tolerated, and no significant difference was found among the four groups in the incidence of adverse events. Conclusion: A 20mg single Ⅳ dose of dexamethasone should be considered the most efficacious prophylactic dose for the prevention of ois-platin induced acute amesis in treatment of cancer.

Rigid Gas Permeable Contact Lens 재료물질에 관한 연구

朴惠正,朴景石,李原鎭 대구산업정보대학 1998 논문집 Vol.12 No.2

To improve the characteristic properties of contact lens materials, the copolymer of HEMA monomer NVP and MAOPTES monomer have been synthesized by the composition ratio of 50:45:5, 50:40:10 and 50:35:15. The copolymer of TMSOEMA monomer with HEMA and NVP have been synthesized as same compositional ratio as MAOPTES. Water content, swelling ratio, contact angle, permeability of oxygen and quantity of adsorptive protein were measured to check properties of copolymers. The experimental result measured for the copolymer containing silicon derivative of low ratio was prefered to be the materials of contact lens which can improve the function, due to the low absorption of protein compound to poly(HEMA) and to the high oxygen permeabilities

3상 전압형 PWM 컨버터의 전류제어

우정인,고성현,진해중,허태원 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper presents a novel current control system in order to eliminate the steady state control error for three-phase voltage source PWM converters. A general mathematical model of the converter which is represented as a state-space model is estabblish. The state-space model is used for simulations of the converter with the proposed tracking control system of sinusoidal current. In this system, a novel current control which do not require coordiante transformations using internal principle of PI controller is described. It is iproved that the steady state deviation reduce to zero from the transfer function fo source current control system. Finally, simulations show good source current control characteristics by means of the simplified control algorithm which do not require coordinate transformations.