問題를 通한 오브젝트指向 프로그래밍에 關한 考察

金宗根 경북전문대학교 1987 慶北專門大學 論文集 Vol.7 No.-

The method "Object-oriented programming" is popularly accepting in Window System, Operating System, Natural Language, and Simulation in diverse area of computer engeering. Besides it also use as a Tool of inference to describe and to make us of Structred Knowlege in Artificial Intellegence. In this thesis, I have studied Object-oriented programming by solving three examples made use of describing format of Objective-C, considering the notions of Object-oriented, difference of Object-oriented programming VS usual structured programming, and the increase of productivity and the re-usability in software.

EPRCA 스위치의 성능 개선 연구

김종근,천성권,강병욱 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.1

Latest, requirements of service of high speed traffics have increased, because these traffics are difficult to predict owing to its bursty occurrence. ATM(Asynchronous Transfer Mode) serves ABR(Available Bit Rate) service for these traffics. When concentrated high speed traffics are arrived, cell loss and cell transfer delay are occurred because statistical multiplexing of ATM raise states of congestion on network. To minimize these influence of congestion, reactive control scheme which takes advantage of feedback information should be used, in this case using preventive control scheme is insufficient. In this paper, we applied variable threshold to determine the congestion in switch node, controled transmission rate dynamically. We simulated our model and analyzed to compare our schemes to the previous ones. The results show that the average transmission rate increased up respectively. The ramp-up time that is the amount of time from the idle state to the balance state is shorter, the maximum number of cells which is much related to cell loss is less, and the control cycle of transmission rate is shorter compared to the previous methods.

陳舊한 急性腦炎(日本型?)의 一部檢症例

全鍾暉,李濟九,李聖洙,池堤根 醫藥係社 1961 綜合 醫學 Vol.6 No.10

IC 실현에 적합한 정현파 능동 발진기의 회로 및 특성에 관한 연구(Ⅱ)

이원건,손태호,박종연 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

Two kinds of simple active oscillators are proposed and analyzed assuming that operational amplifier has two-poles frequency characteristics. The first circuit is composed of one operational amplifier, one resistor and one grounded capacitor. The second oscillator is realized with one operational amplifier and three resitors. Proposed oscillators have the low sensitivity of the oscillation frequency for little variations of the passive element values. By the experimental results obtained with Op-Amp.?A741, the simple oscillators can be useful for the frequency range 1.25 KHz≤f? ≤400KHz for the active -R ocillator, and it is shown to transform the active-R oscillator circuit into the voltage controlled type.Therefore, two kinds of oscillators circuit are attractive for the IC realization, because they hve one operational amplifier, one resistor and one grounded capacitor, or three resistors.

WWW기반의 소액 정보상품 거래를 위한 전자지불 프로토콜

배수진,김종근 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.1

Electronic Commerce(EC) is rapidly spreading on the Internet. For supporting EC, we need more necessity of electronic payments. Especially, most of EC on the Internet is small accounts(micro-payments), so electronic payment system must suit to dealing (or micro-payments. Lots of micro-payment system are studied and developed. Most of electronic micro-payments protocol have studied on the base of electronic money. But, owing to lack of understanding and difficulty to fit real practical situation it may be premature to apply practical Internet environment. We propose an electronic micro-payments protocol for information goods. Our protocol is acted on basis of bank account, so it is easy to apply on Internet for EC.

급성하벽심근경색에서 전흉부유도 ST절 하강의 의의

정병천,배호상,곽동훈,김영태,배용학,황종현,임현주,류재근,조용근,채성철,전재은,박의현 慶北大學校 醫科大學 1997 慶北醫大誌 Vol.38 No.2

목적 : 급성하벽심근경색증 환자에서 심전도상 흔히 동반되는 전흉부유도 ST절 하강의 의의를 알아보았다. 방법 : 심근경색후 24시간에서 48시간에 얻은 심전도를 기준으로 52명의 급성하벽심근경색증 환자를 전흉부유도에서 ST절의 하강이 있는 군과 없는 군으로 나누었으며 심도자, 관상동맥조영술, 심초음파도 및 방사성 핵종을 이용한 좌심구혈율 측정 등을 시행하였다. 결과 : 1) 좌심실확장기말압은 전흉부유도에서 ST절의 하강이 있는 경우에서 16.9±5.33mmHg로 없는 경우의 11.0±4.02mmHg보다 유의하게 높았다(p<0.05). 그러나 운동량 및 좌심구혈을은 흥부 유도상 ST절의 하강이 있는 경우 7.6±3.0 METs 및 53.9±9.1%로 없는 경우의 9.1±2.7 METs 및 54.6±9.5%보다 낮았으나 통계적 유의성은 없었다(p=0.180, p=0.823). 2) 관상동맥조영술상 전흉부 ST절의 하강이 동반된 군에서는 유의한 좌전하행지나 좌회선지의 협착이 있는 경우가 60.9% 및 57.9%로 ST절의 하강이 없는 군에서의 34.5% 및 7.7%와 비교해 좌관상동맥에 협착이 동반된 경우가 많았다(p=0.050, p=0.001). 3) 관상동맥조영술상 세 혈관질환의 빈도는 흉부유도상 ST절의 하강을 보인 23예에서 10예로 ST절 하강이 없었던 29예중 2예에 비하여 유의하게 많았고(P=0.007), 단 혈관질환의 빈도는 ST절의 하강을 보인 군에서 23예중 5예로 ST절 하강이 없었던 29예중 17예에 비하여 유의하게 적었다(P=0.002). 두 혈관질환의 경우에는 각각 8예와 10예로 양군간에 유의한 차이가 없었다. 4) 흉부유도상 ST절 하강의 빈도는 단 혈관질환 22예 중 5예에서, 두 혈관질환 18예중 8예, 세 혈관질환 12예 중 10예에서 관찰되어 협착이 있는 관상동맥의 수가 많을수록 ST절의 하강이 나타나는 빈도가 많음을 보였다(p=0.00308). 그러나 흉부유도상 나타난 ST절의 하강을 모두 합하여 구한 ST절 하강의 합은 협착이 있는 관상동맥의 수와 통계적인 유의성이 없었다. 5) 심초음파도상 좌심실 하벽의 벽운동은 ST절 하강을 보인 군에서는 akinesia가 83.3%, hypokinesia가 11.1%, 정상 벽운동이 5.6%로, ST절 하강이 없었던 군에서의 dyskinesia가 3.6%, akinesia가 39.3%, hypokinesia가 25.0%, 정상 벽운동이 32.1%와 비교하여 ST절의 하강이 있는 군에서 유의하게 벽운동의 장애가 빈번함을 보였다(p=0.03891). 그러나 좌심실전벽, 측벽 및 중격부위에서는 유의한 벽운동의 차이가 없었다. 결론 : 급성하벽심근경색증 환자의 전흉부유도에서 ST절의 하강이 동반되는 경우 다혈관 질환의 가능성이 높으며 좌심실확장기말압이 상승되었고 운동능력은 감소되어 있었다. 또한 심초음파도상 좌심실하벽의 벽운동장애도 심하였다. 따라서 전흉부 ST절의 하강을 동반한 급성하벽심근경색증 환자는 전흉부유도에 ST절 하강이 없는 경우보다 예후가 불량할 것으로 생각되며, 보다 적극적인 치료가 필요할 것으로 생각된다. The purpose of this study was to determine the significance of precordial ST segment depression appearing during acute inferior myocardial infarction and to assess the correlation of that with angiographic finding. 52 patients were allocated into two groups based on the existence of precordial ST segment depression : 23 patients with ST segment depression and 29 patients without ST segment depression. The extent of coronary artery disease as well as the prevalence of significant stenosis (≥70%) in left anterior descending artery were more frequent in patients showing precordial ST segment depression than in patients not showing them (p=0.050) and the result were similar in cases of left circumplex artery (p=0.001). On echocrdiographic examination of left ventricular (LV) wall motion, it showed more severely decreased inferior LV wall motion in patients showing precordial ST segment depression than in patients not showing them (p=0.03891) even though the other segment of LV wall motion didn't show the statistical difference between both groups. The other cardiac parameters such as LVEDP, exercise amount (METs) and ejection fraction were tend to showing bad profile in patients with precordial ST segment depression. From the above results, we could deduce that patients with precordial ST segment depression have relatively large infarction or concomitant left coronary artery disease, so they need more caution and intensive theraphy.

Comparison study of single-port (OctoportTM) and four-port total Laparoscopic hysterectomy

( Gun Oh Chong ),( Nae Yoon Park ),( Dae Gy Hong ),( Young Lae Cho ),( Il Soo Park ),( Yoon Soon Lee ) 대한산부인과학회 2011 대한산부인과학회 학술대회 Vol.97 No.-

Robotic excision of cervical adenomatoid tumor: a case report

( Gun Oh Chong ),( Nae Yoon Park ),( Dae Gy Hong ),( Young Lae Cho ),( Il Soo Park ),( Yoon Soon Lee ) 대한산부인과학회 2011 대한산부인과학회 학술대회 Vol.97 No.-

A Usage Parameter Control Method using Variable Token Pool in ATM Networks

Chong Gun Kim,Hwan Chung Lee 대한전자공학회 1995 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

Prognostic value of pre-treatment human papilloma virus DNA status in cervical cancer

Chong, Gun Oh,Lee, Yoon Hee,Han, Hyung Soo,Lee, Hyun Jung,Park, Ji Young,Hong, Dae Gy,Lee, Yoon Soon,Cho, Young Lae Elsevier 2018 Gynecologic oncology Vol.148 No.1

<P><B>Abstract</B></P> <P><B>Objective</B></P> <P>Although the relationship between human papilloma virus (HPV) and cervical cancer is well established, the prognostic value of HPV status has not been determined, largely because previous studies have yielded conflicting results. This study aimed to investigate the prognostic value of pre-treatment HPV DNA for predicting tumor recurrence in cervical cancer.</P> <P><B>Methods</B></P> <P>The study included 248 eligible patients who provided cervical cell specimens for HPV genotyping before surgery or concurrent chemoradiotherapy (CCRT). Of these 248 patients, 108 were treated with radical hysterectomy for International Federation of Gynecology and Obstetrics (FIGO) stage IB1–IIA cervical cancer, and 140 were treated with CCRT for FIGO stage IB2–IV cervical cancer.</P> <P><B>Results</B></P> <P>HPV 16 and 18 were the two most common HPV types detected, with prevalence rates of 52.4% and 12.5%, respectively. The pre-treatment HPV DNA test showed that 18.5% of cervical cancers were HPV negative. Multivariate analysis showed that HPV negativity was associated with poorer disease-free survival (DFS) than HPV-positive status (hazard ratio [HR], 3.97; 95% confidence interval [CI], 1.84–8.58; <I>p</I> =0.0005), and patients with HPV 16-positive cancers had better DFS (HR, 0.41; 95% CI, 0.23–0.72; <I>p</I> =0.0019). In the surgery group, only HPV 16 positivity was significantly correlated with DFS (HR, 0.34; 95% CI, 0.12–0.96; <I>p</I> =0.0416). In the CCRT group, only HPV negativity was significantly correlated with DFS (HR, 3.75; 95% CI, 1.78–7.90; <I>p</I> =0.0005).</P> <P><B>Conclusions</B></P> <P>Pre-treatment HPV DNA status may be a useful prognostic biomarker in cervical cancer. The presence of HPV 16 DNA was associated with better DFS, and HPV negativity was associated with worse DFS. However, larger sample sizes and more comprehensive studies are required to verify our findings.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Pretreatment HPV DNA status may be a useful prognostic biomarker for predicting disease recurrence in cervical cancer. </LI> <LI> HPV 16 infection was associated with better survival, particularly in the surgery group. </LI> <LI> HPV negativity was associated with worse survival, particularly in the CCRT group. </LI> </UL> </P>