청소년 인터넷 중독 검사 방법의 통계적 고찰 및 개선 -Young의 척도를 중심으로

박찬정 ( Chan Jung Park ),김형철 ( Hyung Chul Kim ),고영민 ( Young Min Ko ),현정석 ( Jung Suk Hyun ),김철민 ( Cheol Min Kim ) 한국컴퓨터교육학회 2010 컴퓨터교육학회 논문지 Vol.13 No.4

국내외에서 이루어진 기존의 인터넷 중독 검사에 대한 연구는 다양하며 방대하지만, 대부분의 연구가 중독도 검사를 위한 항목추출이거나 항목들을 이용한 중독도 분석이었지 항목간의 분석을 통한 차별화는 이루어지지 않았다. 본 논문에서는 리즈렐과 데이터마이닝 기법을 이용하여 Young의 인터넷 중독 검사방법을 고찰하고 문제점을 지적한 후, 검사 방법에 대한 대안을 제안한다. 이를 위해 Young의 척도를 이용하여 청소년 440명을 대상으로 설문을 실시하고, 요인분석을 통해 Young 척도의 문제점을 분석한다. 또한, 데이터 마이닝 알고리즘인 J48 및 PART를 이용하여 설문문항들 중에서 인터넷 중독도를 구분 지을 수 있는 항목들을 선별하고 이를 기반으로 인터넷 중독 학생들을 진단하고 처방하는데 활용하는 방법을 제안한다. So far, the researches about the Internet addiction testing are diverse and enormous. However, since the testing factors have the same importance, there is no discrimination among the factors. In our paper, we analyze the problems of the existing researches by using Lisrel and data mining algorithms. Next, we propose an alternative for the Internet addiction testing. In order to accomplish these, we make an questionnaire consisted of Young`s test and then, we asked to 440 primary and secondary school students. In addition, we analyzed the problems of Young`s test with factor analysis and then, we distinguish more important items from others with J48 and PART. Finally, based on this analysis, we propose a method to diagnose addicted students and prescribe them.

Elderly kidney transplant recipients have favorable outcomes but increased infection-related mortality

임정훈,Lee Ga Young,Jeon Yena,Jung Hee-Yeon,Choi Ji Young,CHO, JANG-HEE,Park Sun Hee,김용림,Kim Hyung-Kee,Huh Seung,유은상,Won Dong Il,Kim Chan-Duck 대한신장학회 2022 Kidney Research and Clinical Practice Vol.41 No.3

Background: The number of elderly patients with end-stage kidney disease has been increasing, but the outcomes of kidney transplants (KT) remain poorly understood in elderly patients. Therefore, we evaluated the clinical outcomes of elderly KT recipients and analyzed the impact of elderly donors. Methods: This retrospective cohort study included patients who underwent KT between 2000 and 2019. KT recipients were divided into four groups according to a combination of recipient and donor age (≥60 or <60 years); elderly recipients: old-to-old (n = 46) and young-to-old (n = 83); young recipients: old-to-young (n = 98) and young-to-young (n = 796). We compared the risks of mortality, graft failure, and acute rejection between groups using Cox regression analysis. Results: The incidence of delayed graft function, graft failure, and acute rejection was not different among groups. Annual mean tacrolimus trough level was not lower in elderly recipients than young recipients during 10-year follow-up. Mortality was significantly higher in elderly recipients (p = 0.001), particularly infection-related mortality (p < 0.001). In multivariable Cox regression analysis, old-toold and young-to-old groups had increased risk of mortality (adjusted hazard ratio [aHR], 2.89; 95% confidence interval [CI], 1.14– 7.32; p = 0.03; aHR, 3.06; 95% CI, 1.51–6.20; p = 0.002). However, graft failure and acute rejection risks were not increased in elderly recipients. Conclusion: In elderly recipients, graft survival and acute rejection-free survival were not inferior to those of young recipients. However, mortality, especially risk of infection-related death, was increased in elderly recipients. Thus, low immunosuppression intensity might help decrease mortality in elderly recipients.

영골(靈骨).강압혈(降壓穴) 자극(刺鍼)이 혈압(血壓)에 미치는 영향(影向)

임영남,심성용,한지완,고호연,박종형,한양희,전찬용,김동우,Yim, Young-Nam,Sim, Sung-Yong,Han, Ji-Wan,Ko, Ho-Yeon,Park, Chong-Hyeong,Han, Yang-Hee,Chun, Chan-Yong,Kim, Dong-Woo 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.2

Objective : The purpose of this study is to evaluate the clinical effect of the non-pharmacological anti-hypertension method, acupuncture, for hypertensive patients. Methods : 26 patients diagnosed with hypertension were each treated by one of three methods: an anti-hypertension drug(adalat soft capsule), venepuncture, and acupuncture. In cases of rising blood pressure, patients were treated by their one of the three methods, and blood pressure was measured at regular intervals. Result : As for the group of acupuncture treated patients on Young-gol(ling-gu) and Gang-ap-hyul(jiang-ya-xue), readings dropped 18.0mmHg in systolic blood pressure and 6.50mmHg in diastolic blood pressure. This was a greater effect than that seen in the venepuncture treated patients. Blood pressure checked one hour after acupuncture treatment showed a greater difference than blood pressure checked after thirty minutes. Conclusion : Safe reductions in blood pressure were observed through the non-pharmacological method of acupuncture on Young-gol(ling-gu) and Gang-ap-hyul(Jiang-ya-xue).

차아염소산나트륨 용액과 고압증기멸균이 근관치료용 니켈-타이타늄 파일의 주기적 피로 파절에 미치는 영향

조혜영,정일영,이찬영,김의성 大韓齒科保存學會 2008 Restorative Dentistry & Endodontics Vol.33 No.1

The purpose of this study was to determine the effect of sodium hypochlorite and steam autoclaving on the cyclic fatigue of nickel-titanium endodontic files. Two types of files with a .06 taper and #30 were used, K3^(ⓡ) (SybronEndo, Glendora, California, USA) and Hero642^(ⓡ)(Micro-Mega, Besancon, France). The files were divided into 6 experimental groups containing 10 files each group depending the soaking time in 6% sodium hypochlorite solution and number of cycles of steam autoclave. After sterilization, a cyclic fatigue test was performed on each file, and the fracture time was recorded in seconds. The control group underwent the cyclic fatigue test only. After the test, the surface characteristics of the files were observed using scanning electron microscopy (SEM). All groups containing the Hero 642^(ⓡ) files showed a similar cyclic fatigue fracture time. However, the cyclic fatigue fracture time with the K3^(ⓡ) files was significantly shorter in groups which were treated with sodium hypochlorite than in the control group (P < 0.05). SEM revealed both Hero642^(ⓡ) and K3^(ⓡ) files to have significant corrosion on the file surface in groups treated with sodium hypochlorite, compared with the sharp and regular blades of the control group. K3^(ⓡ) files showed more corrosion than the Hero642^(ⓡ) files. Bluntness of the blades of the K3^(ⓡ) file was observed in groups treated with steam autoclave. Although there was no obvious destruction on the surface of steam autoclaved Hero642^(ⓡ) files, slight bluntness was observed. Sterilizing with a steam autoclave is much less destructive to K3^(ⓡ) files than sodium hypochlorite. The longer time exposed to sodium hypochlohte, the more destructive pattern was shown on the blades of the files. Therefore, when using sodium hypochlorite solution, the exposure time should be as short as possible in order to prevent corrosion and increase the cyclic fatigue fracture time. 본 연구에서는 차아염소산나트륨 용액 및 고압증기멸균이 근관 치료용 Ni-Ti 파일의 주기적 피로 파절에 미치는 영향을 알아보고자 하였다. 파일 첨단 크기가 #30이고 .06 taper를 가지는 Hero 642^(ⓡ)와 K3^(ⓡ)파일 70개를 10개씩 7개의 군으로 나누었으며, 6% 차아염소산나트륨 용액에 15분 (N15군), 30분 (N30군),고압증기멸균은 121 ℃의 온도, 0.12 ㎫의 압력에서 20 분간 시행하는 것을 일 회로 하여 5회 (H5군), 10회 (H10), 고압증기멸균 5회 후 차아염소산나트륨 용액 15분 (H5N15),고압증기멸균 10회 후 차아염소산나트륨 용액 30분 (H10N30) 처리 후 주기적 피로 파절 실험을 수행하여 파일이 파절될 때까지의 시간을 초 단위로 측정하였다. 대조군은 전처리를 하지 않고 주기적 피로 파절을 시행하였다. 95%의 신뢰도로 one-way analysis of variance를 이용하여 통계 처리하였으며 , 다중 비교는 Tukey방법으로 분석하였다. 파일의 표면을 주사전자현미경으로 관찰하였다. 주기적 피로 파절에 소요된 시간은 Hero 642^(ⓡ)는 각 군별로 유의할 만한 차이가 없었으며, K3^(ⓡ)는 N15, N30, H5N15군에서 대조군에 비해 짧은 시간이 소요된 것으로 나타났다 (p < 0.05). 주사전자 현미경에서 관찰했을 때 Hero 642^(ⓡ)와 K3^(ⓡ) 모두 N15, N30 군에서 파일의 표면과 날이 부식이 되어 대조군에서 관찰된 일정방향으로 배열된 정형화된 예리한 빗살무늬가 부분적으로 파괴된 형태가 관찰되었으며 ,N15군에 비해 N30군에서 파일의 형태가 파괴된 양상이 뚜렷했으며 ,Hero 642^(ⓡ)보다 K3^(ⓡ)가 심하게 부식된 양상이었다. H5군과 H10군에서는 K3^(ⓡ)파일은 날 부분이 무디어진 양상을 보였고, Hero 642^(ⓡ)는 형태 파괴가 뚜렷하지 않았으나 H10군에서 표면의 빗살무늬가 약간 무디어진 양상을 보였다. H5N15군과 H10N30군에서는 그다지 뚜렷한 형태변화는 없었다. 본 연구 결과 K3^(ⓡ)파일을 사용 시에는 가능한 한 차아염소산나트륨에 적은 시간 노출 시키는 것이 파일의 부식으로 인한 형태의 손상을 방지 할 수 있고, 주기적 피로 파절에 걸리는 시간도 감소시킬 수 있을 것이다.

소아 흉통의 원인질환에 따른 임상양상

장국찬,김은영,노영일,양은석,문경래,박영봉 朝鮮大學校 附設 醫學硏究所 2008 The Medical Journal of Chosun University Vol.33 No.2

목적: 소아에서의 흉통은 흔히 접하게 되며 일반적으로 좋은 경과를 보인다. 가장 흔한 원인으로 특발성, 골격계이상, 위장관계 질환 등이 다양하게 언급되고 있으며 감별진단이 쉽지 않아 여러 검사를 시행하게 된다. 자세한 병력청취와 진찰이 진단에 가장 중요하다고 하지만 통계적 의의를 보고한 바는 드물다. 이에 흉통 원인을 분류하고 각각의 임상양상을 파악하여, 병력 청취와 진찰소견의 감별진단에 대한 유용성과 시행 검사들의 의의를 알아보고자 하였다. 방법: 2004년 3월 부터 2007년 8월 까지 조선대학교 병원 소아청소년과에 흉통을 주소로 방문한 환아 77명을 대상으로 하였다. 연령, 성별, 흉통의 위치, 지속시간, 양상, 빈도, 방문까지 걸린 시간, 동반증상, 유발인자의 각 항목과 원인 질환과의 관련성을 분석하였다. 흉부방사선, 심전도, 심초음파, 24시간 Holter, 운동부하 심전도, 상부 위장관 조영술, 24시간 pH 검사, 위내시경, 심근효소를 검사 하였다. 결과: 평균 나이는 10.2±2.8세로 6세에서 11세까지가 48명(62.3%)으로 가장 많은 분포를 보였고 남아 42명(54.5%), 여아 35명(45.5%)이었다. 흉통의 위치는 좌측이 32명(41.6%), 양상은 콕콕 찌르는 것이 27명(35.1%)으로 가장 많았고 지속시간은 1분미만이 36명(46.8%), 1-5분 사이가 28명(36.4%)으로 대부분 5분 미만이었다. 흉통 원인은 특발성이 27례(35.1%)로 가장 많았고, 위장관 질환 23례(29.9%), 늑골 연골염 12례(15.6%), 심혈관 질환 7례(9.1%), 정신신체화 질환 6례(7.8%), 폐질환 2례(2.6%)였다. 여아에서 연령이 높을수록 정신신체화 질환의 빈도가 높았다(P= 0.046). 흉골 하부 통증을 호소한 17명 중 13명(76.5%)이 위장관 질환으로 통계적으로 유의하였다(P= 0.023). 정신 신체화 질환은 6명에서, 위장관 질환도 20명(86.9%)에서 흉통지속시간이 5분 미만이었으나 통계적 의의는 없었다. 흉통 양상 중 타는 듯한 양상을 호소한 7명중 6명에서 위장관 질환이 원인이었으나 통계적 의의는 없었다. 선택 시행 검사 중 심초음파는 32명중 3례(9.4%), 24시간 Holter 검사는 13명중 5례(35.7%), 24시간 pH 검사는 28명 중 16례(57.1%)에서 이상소견을 보였다. 결론: 소아 흉통 환자 중 연령이 높은 여아에서는 정신 신체화 장애를, 흉골 하부 통증을 호소한 경우는 위장관 질환을 먼저 생각하는 것이 좋다고 판단된다. 흉통원인으로 위장관 질환의 빈도가 높고 시행검사들의 진단율을 볼때, 소아 흉통 환아 에서는 상부 위장관 조영술 등 위장관 질환의 검사를 기본적으로 시행하는 것이 좋을 것으로 생각된다. Purpose: Chest pain in children is usually benign. Chest pain in children results from a wide variety of causes. Differential diagnosis of causes is not easy and then many diagnostic approach is trying. Careful history and physical exams must guide the assessment of children with chest pain. The purpose of this study intends to evaluate children with chest pain and usefulness of careful history, physical examination and several diagnostic examinations. Methods: From March 2004 to August 2007, 77 patients presented with chest pain were enrolled. we evaluated age, sex, characteristics of chest pain (location, duration, description, frequency), accompanying symptoms, increasing reasons and relationship with cause of chest pain. Chest x-ray and ECG were checked in all patients. Cardiologic and gastrointestinal evaluations were checked when considered necessary. Results: The male and female ratio was 0.55:0.45, mean age 10.2 ± 2.8 year. Common ages of chest pain were 10 to 12 years old (38case, 49.3%). The location was on the left precordium in 32cases (41.6%) of the patients. The most common diagnostic findings of chest pain were idiopathic(27cases, 35.1%), gastrointestinal disorder (23cases, 29.9%), costo chondritis (12cases, 15.6%), cardiovascular disorder (7cases, 9.1%), psychosomatic disorder(6cases, 7.8%) and pulmonary disorder (2cases, 2.6%). Older children in female were more likely to have a psychosomatic cause (P= 0.046). The patients complained chest pain on substernal area were 17cases and 13cases (76.5%) were diagnosed as gastrointestinal disorder (P= 0.023). Positive findings of echocardio graphy, 24hr Holter ECG and 24hr pH monitoring were present in 3 (9.4%), 5 (35.7%) and 16 (57.1%) of the patients respectively. Conclusion: Gastrointestinal disorders are common causes and positive diagnostic rate of gastrointestinal evaluation is relatively high in children with chest pain. Old girls are more likely to have a psychosomatic disorder and substernal pain is the reliable sign to be considered as a gastrointestinal disease in children with chest pain. Hence, Diagnostic approach of gastrointestinal disease such as upper GI should be performed basically in mostly children with chest pain.

유산 완충용액의 pH 및 포화도 변화에 따른 법랑질 내 수산화인회석 결정 형태의 변화

전영의,정일영,노병덕,이찬영 大韓齒科保存學會 2007 Restorative Dentistry & Endodontics Vol.32 No.6

Since it was reported that incipient enamel caries can be recovered, previous studies have quantitatively evaluated that enamel artificial caries have been remineralized with fluoride, showing simultaneously the increase of width of surface layer and the decrease of width of the body of legion. There is, however, little report which showed that remineralization could occur without fluoride. In addition, the observations on the change of hydroxyapatite crystals also have been scarcely seen. In this study, enamel caries in intact premolars or molars was induced by using lactic acidulated buffering solutions over 2 days. Then decalcified specimens were remineralized by seven groups of solutions using different degree of saturation (0.212, 0.239, 0.301, 0.355) and different pH (5.0, 5.5, 6.0) over 10 days. A qualitative comparison to changes of hydroxyapatite crystals after fracturing teeth was made under SEM (scanning electron microscopy) and AFM (atomic force microscopy). The results were as follows : 1. The size of hydroxyapatite crystals in demineralized area was smaller than the normal ones. While the space among crystals was expanded, it was observed that crystals are arranged irregularly. 2. In remineralized enamel area, the enlarged crystals with various shape were observed when the crystals were fused and new small crystals in intercrystalline spaces were deposited. 3. Group 3 and 4 with higher degree of saturation at same pH showed the formation of large clusters by aggregation of small crystals from the surface layer to the lesion body than group 1 and 2 with relatively low degree of saturation at same pH did. Especially group 4 showed complete remineralization to the body of lesions. Group 5 and 6 with lower pH at similar degree of saturation showed remineralization to the body of lesions while group 7 didn't show it. Unlike in Group 3 and 4, Group 5 and 6 showed that each particle was densely distributed with clear appearance rather than crystals form clusters together. 법랑질 초기 우식이 회복된다는 것이 보고된 이래 법랑질에 대하여 불소를 첨가한 상태에서 행했던 이전의 연구들은 법랑질 인공우식의 재광화가 표면층의 증가와 함께 병소본체의 폭 감소가 일어난다는 정량적인 평가는 많이 하였으나 불소를 첨가하지 않은 상태에서는 재광화가 일어났다는 연구는 부족하였고, 또 수산화인회석 결정의 입자 변화에 대한 관찰도 미비하였다. 본 연구는 탈회나 균열이 없는 소구치 및 대구치를 대상으로 탈회 완충용액을 이용하여 법랑질을 2일간 탈회시키고, pH와 포화도가 상이한 7가지 유산 완충용액으로 10일 동안 재광화를 유도한 후 치아를 파절시켜 수산회인회석 결정의 변화를 원자현미경과 주사전자현미경을 이용하여 정상적으로 비교 관찰하여 다음과 같은 결과를 얻었다. 1. 탈회된 부위에서 관찰된 수산화인회석 결정은 정상적인 수산화인회석 결정보다 크기가 작았으며 결정 사이의 공간이 증가하면서 결정들이 불규칙하게 존재하는 것이 관찰되었다. 2. 재광화된 부위에서는 탈회에 의하여 형성된 빈 공간에 작은 수산화인회석 결정이 새로 침착되는 양상과 결정들이 융합하여 다양한 모습을 갖는 더 커진 결정들을 관찰할 수 있었다. 3. 동일한 pH에서 포화도가 더 높은 3군, 4군은 1군, 2군에 비하여 표면층에서부터 병소본체까지 작은 결정들이 모여 큰 cluster를 형성하였으며 특히 4군에서는 병소본체까지 완전한 재광화가 일어났다. 비슷한 포화도에서는 pH가 더 낮은 5군, 6군은 7군에 비하여 병소본체까지 재광화가 일어났으며 3군, 4군처럼 결정들이 모여 cluster를 형성하기보다는 개개의 입자들이 뚜렷한 외형을 가지며 매우 치밀하게 분포되어 있었다.

이영석 著, 『영국 제국의 초상 19세기 말 영국 사회의 내면을 읽는 아홉 가지 담론들』 푸른역사, 2009

朴贊玲(Park Chan-Young) (서평자) 歷史敎育硏究會 2010 역사교육 Vol.113 No.-

Borrmann 4형으로 진단된 진행성 위암환자의 임상적 검토

천영국,김영태,홍수진,김진오,조주영,이문성,심찬섭 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Background/Aim: It is difficult to dignosis of Borrmann type 4 gastric cancer at the early stage, because of its special morphology. Most of the cases have been detected at the advanced stage with poor survival rate. We reviewed patients with advanced gastric cancer, to define clinicopathologic characteristics of Borrmann type 4 gastric cancer comparing other types of gastric cancer. Methods: 1033 patients with advanced gastric cancer were divided into two groups, consisting of 50 patients with Borrmann type 4 gastric cancer, and the remaining 983 patients with all other types of gastric cancer, which were then compared clinicopatologically. Results: The proportion of Borrmann type 4 gastric cancer to advanced gastric cancer was 4.48%(50/1,033). The patients with Borrmann type 4 gastric cancer to advanced gastric cancer was 4.48%(50/1,033). The patients with Borrmann type 4 gastric cancer were composed 20 males and 30 males and revealed the highest frequency 3rd decade (24.0%) in age (range 26-78). In giant folds group (n=27), the number of poorly differentiated cell type, lymph node metastasis, peritoneal seeding were 20 (74.1%), 17 (63,0%), 12 (44.4%). In non-giant folds group (n=23), the number of poorly differentiated type, lymph node metastasis, peritoneal seeding were 17 (73.9%), 15 (65.2%), 6 (26.1%). Rate of tumor invasion in serosa and beyound serosa was 88.9% in giant fold group, 63.0% in non-giant fold group. Surgery was performed in only 32% as a modality of treatment (vs. 82.5%). Characteristics findings of Borrmann type 4 gastric cancer in EUS showed a thickening of the third (submucosa) and fourth (muscularis propria) layers in 72% of 50 patients, and a well preserved five-layered gastric wall structure in 33 patients. Conclusions: We concluded that Borrmann type 4 gastric cancer was diagnosed more in females, as a more advanced disease, early detection was needed. And endoscopic ultrasonography is useful for diagnosis of Borrmann type 4 gastric cancer in the cases of suspicious results of gastroscopy.

지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.4

This study was conducted to evaluate the temperature rise on the root surface while the root canal is being obturated using continuous wave of condensation technique. Maxillary central incisor was prepared for repeated canal obturation. Ten thermocouples (Omega Engineering Inc., Stanford, USA) were placed at 1mm increment from the anatomical root apex. The real temperature of Buchanan plugger was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan and the root surface temperature was recorded during obturation at 150℃, 200℃, 250℃ and 300℃ temperature settings of System B HeatSource (Model 1005, Analytic technologies, Redmond, WA, USA). After completion of the temperature recording, the dentinal-cementum thickness at each sites was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1mm point from the tip revealed 130.82±2.96℃ 158.00±5.26℃, 215.93±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 mm from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93±0.09℃ at 250℃ setting and 5.69±0.15℃ at 300℃ setting respectively. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital temperature display of System B HeatSource.