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RRCF 알고리즘을 활용한 RAN 장비 이상 검출에 관한 연구
이택현(Taek-Hyun Lee),국광호(Kwang-Ho Kook) 한국정보통신학회 2021 한국정보통신학회 종합학술대회 논문집 Vol.25 No.1
코로나19의 펜데믹 현상으로 인하여 모바일 서비스의 활용 비중이 높아지고 있다. 그러나, 대부분의 모바일 장비에 대한 이상 현상을 장비의 알람 중심으로 인지하므로, 복잡한 장애가 발생할 경우에 직관적으로 장비의 문제 판별하기 어려운 한계가 발생한다. 이를 보완하기 위해서 본 연구에서는 장비의 알람과 성능 정보를 조합하여 직관적으로 문제를 인지할 수 있도록 RRCF 알고리즘을 활용하여 Anomaly Score 생성하였으며, 과거 장애 이력을 97% 검출하는 효과를 검증하였다. Due to the pendemic of Corona 19, the use of mobile services is increasing. However, since anomalies in most mobile devices are recognized by the device's alarm, it is difficult to intuitively determine the problem of the device when a complex failure occurs. To compensate for this, in this study, the Anomaly Score was created by RRCF algorithm to intuitively recognize the problem by combining the alarm and performance information of the equipment, and the effect of detecting 97% of the past failure history was verified.
천식모델을 이용한 호도, 파고지 및 두 배합약물의 실험적 연구
권택현 ( Taek Hyun Kwon ),이영철 ( Young Cheol Lee ),이장천 ( Jang Cheon Lee ) 대한본초학회 2009 大韓本草學會誌 Vol.24 No.2
Objectives: To clarify the possible effect of JS (Juglans sinensis), PCF (Psoralea corylifolia L.), and J+P(JS+PCF), we examined their influence on the development of pulmonary eosinophilic inflammation in the asthmatic murine model. Methods: All mice were immunized on two different days (21 days and 7 days before inhalational exposure) by intraperitonial injections of 0.2 ml alum-precipitated Ag containing 100 ㎍ of OVA bound to 4 mg of aluminum hydroxide in PBS. Seven days after the second sensitization, mice were exposed to aerosolized ovalbumin for 30 minutes/day on 3 days/week for 8 weeks (at a flow rate of 250 L/min, 2.5% ovalbumin in normal saline) and, JS, PCF and J+P (200 mg/kg, 400 mg/kg) were orally administered 3 times per week for 8 weeks. Results: The suppressive effects of JS, PCF, and J+P were demonstrated by the accumulation of eosinophils into airways, with the reduction of eosinophils and lung leukocytes. These were correlated with the marked reduction of IL-4, IL-5, IL-13 levels in the BALF and serum. OVA-specific IgE levels were also decreased in serum and BAL from these mice. And also JS, PCF, and J+P decreased eosinophilic CCR3 and CD11b expression in lung tissue. Conclusions: These results indicate that JS, PCF, and J+P have deep inhibitory effects on airway inflammation and hyper-responsiveness in the asthmatic murine model. The suppression of IL-5, IgE, and eosinophilils and the increase of IFN-γ production in BALF seem to contribute to these effects. Specially, esosinophils and TNF-a in J+P combination group were significantly reduced in BALF and lung tissue. Hence, the results indicated that JS, PCF, and J+P could act as an immuno-modulator which possesses anti-inflammatory and anti-asthmatic property by modulating the imbalance between Th1 and Th2 cytokines.
권택현,정흥섭,박윤관,조태형,임동준,박정율,정용구,이훈갑,이기찬,서중근,Kwon, Taek Hyun,Chung, Hung Seob,Park, Youn Kwan,Cho, Tai Hyoung,Lim, Dong Jun,Park, Jung Yul,Chung, Yong Gu,Lee, Hoon Kap,Lee, Ki Chan,Suh, Jung Keun 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.7
Objective : Although surgical clipping of intracranial aneurysm is the definite method of treatment, there remains a small number of patients in whom surgical clipping is not technically possible. In such difficult cases, surgeon has to consider other therapeutic alternatives. In this report, we analyze our aneurysmal cases treated by wrapping and coating method and evaluate their surgical outcome and follow-up results. Method : Among the total of 877 patients operated from 1990 to 1999 for intracranial aneurysms at our hospital, 40 cases(4.6%) were treated by wrapping and coating method. They included 24 cases of single ruptured aneurysms and 16 with unruptured ones in multiple aneurysms. Wrapping with temporalis muscle and/or muslin gauze and coating with bioadhesive agent such as fibrin glue were performed. Result : Wrapping and coating method was performed mostly to the anterior communicating artery aneurysm (35%), and mostly because of the broad-based neck of an aneurysm(43%). At the time of discharge, 30 out of 40 patients(80%) showed favourable outcome and three cases died. The patients were monitored for average of 37 months(3-75 months). Among 24 cases with single ruptured aneurysm, 4 cases(17%) had early rebleeding within 6 months from the initial hemorrhage, and such rebleeding occurred within the first postoperative month in 3 cases. However, there was no rebleeding after the 6 months. Among 16 patients whose aneurysms were unruptured ones, none of them showed bleeding episode. Conclusion : It seems likely that the wrapping and coating method would be some help to prevent the rebleeding of an intracranial aneurysm. In order to obtain more accurate results regarding the efficacy of such method, it will be necessary to perform a multi-center study for longer follow-up periods and various wrapping and coating materials.
진택현 ( Taek Hyun Jin ),지유진 ( Yu Jin Jee ),류동목 ( Dong Mok Ryu ),권용대 ( Yong Dae Kwon ),이덕원 ( Deok Won Lee ) 한국조직공학·재생의학회 2008 조직공학과 재생의학 Vol.5 No.4
The present study was performed to examine the genes expression during osseointegration of dental implant. Machined, resorbable blast media(RBM), oxidized surface treated implants were used in this study. This 3 different surface treated implants with 5 mm in length and 3 mm in diameter were placed in the tibia of the rabbit. In the control group, only bone defect was made. Rabbits were sacrificed for histomophormetric evaluation and GeneFishing analysis at 1, 2, 6 weeks after implant placement. In histomorphometric evaluation with the measurement of BIC(bone-implant contact ratio) and BA(bone area ratio), RBM surface implant showed highest value in both BIC and BA, and machined surface implant showed lowest score. In GeneFishingTM screening analysis, 52 DEGs(differentially expressed genes) were expressed in 1 week group and 50 DEGs in 2 weeks group. This result suggests that implant surface treatment modulates the gene expression of bone tissue around dental implant. And then, direct sequencing and BLAST of 33 DEGs were performed. 6 DEGs were identified as known genes. Other DEGs were EST(expressed sequence tag) or unknown genes. This results suggests that many unknown genes are related to osseointegration of dental implant.
동의보감(東醫寶鑑) 중(中) 목통(木通)이 주약(主藥)으로 배오(配伍)된 처방(處方)의 활용(活用)에 대한 고찰(考察)
이상민,권택현,옥인수,윤용갑,Lee, Sang-Min,Kwon, Taek-Hyun,Ok, In-Soo,Yun, Young-Gab 대한한의학방제학회 2005 大韓韓醫學方劑學會誌 Vol.13 No.1
This report describes the remedial fields, symptoms, pathology, dosage, prescriptional constitution of 46 studies related to the use of Lignum akebiae main blended prescriptions from Dongeubogam. The following conclusions were reached through investigations on the prescriptions that use Lignum akebiae as a key ingredient. Lignum akebiae blended prescriptions are utilized 17.4% of prescriptions appear in the chapter of urine. Prescriptions that utilize Lignum akebiae as the main ingredient are used commonly in the treatment of the symptoms of a urine and a cystic disease related to the urinary organs, or the diseases of eye, ear, nose, throat and the symptoms of a tumor, abscess. Lignum akebiae is utilized for an etiological and pathologenic fators related to heat, dampness, phlegm and summer heat such as excessive fever of heart and bladder, fever of small intestine, lower energizer dampness and heat, fever due to blood deficiency, phlegm fire, affection by summer heat and dampness etc. The clinical dosage of Lignum akebiae is 1 don(about 3.75gram), according to symptoms, it has ranged at a wide variety of amounts from 3 pun(about 1.13gram) to 1.5 don(about 11.25gram). Lignum akebiae is widely applied with base prescriptions such as Dozuksan, Moktongchajuntang, Manjunmoktongtang. etc.
박준오,권택현,박윤관,정흥섭,이훈갑,서중근,Park, Juno,Kwon, Taek-Hyun,Park, Youn-Kwan,Chung, Hung-Seob,Lee, Hoon-Kap,Suh, Jung-Keun 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.5
Objective : The anterior communicating artery(ACoA) is known to be the most frequent location of intracranial aneurysms, but the complex arterial anatomy of the ACoA region makes this aneurysm among the most difficult one to treat. In the treatment of ACoA aneurysms, the direction of aneurysmal fundus is known to be very important in the surgical tactics. All ACoA aneurysms in our series were classified according to its direction, and analyzed the clinical features in order to investigate the prognostic factors influencing upon the surgical outcome. Methods : The authors reviewed 236 cases of ruptured ACoA aneurysms that were operated from 1990 to 1997, were classified according to Pia's classification. Results : The incidence rate of the ACoA aneurysm was 35.1%(236/672). Ventral group was more common than dorsal group, especially in ventro-caudal projection subgroup(36.0%). Poor preoperative clinical grade(Hunt-Hess grade IV and V) patients were more common in dorsal group(13.1%) than ventral group(2.6%). Rebleeding and intracerebral hematoma were more commonly seen in ventral group. However, vasospasm, hydrocephalus, hyponatremia, and intraventricular hemorrhage were observed more frequently in dorsal group. Worse outcome was more common in dorsal group than ventral group, especially in dorso-caudal projection subgroup. Also, poor outcome was identified in patients with intracerebral hematoma, intraventricular hemorrhage, hyponatremia, and hypertension, although statistically insignificant. In cases with the A1 dominancy, there was no difference in surgical outcome between the right and left side approach. The higher the aneurysmal neck from the planum sphenoidale, the worse outcome via pterional approach. Conclusion : It seems that the preoperative clinical grade, aneurysmal direction, and the height of aneurysmal neck, especially in the pterional approach, would be the major prognostic factors, and that intracerebral hematoma, intraventricular hemorrhage, hyponatremia, hydrocephalus and the intraoperative aneurysmal rupture would be the minor prognostic factors.
소아에서 뇌수두증의 단락술 이후 발생한 석회화된 만성 경막하 혈종 - 증례보고 -
박준오,권택현,박윤관,정흥섭,이훈갑,서중근,Park, Juno,Kwon, Taek-Hyun,Park, Youn-Kwan,Chung, Hung-Seob,Lee, Hoon-Kap,Suh, Jung-Keun 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.7
Post-shunting subdural hemorrhages are usually small and self-limited, and they can be recognized on the routine post-operative CT examinations. However, delayed subdural bleeding may occur without any clinical symptoms or signs. Thus the hematoma remains undetected, and it can be increased in size and sometimes become calcified with time. We experienced a case of 15-year-old male with a large calcified subdural hematoma who had undergone shunt operation 10 years previously. With pertinent review of the literatures, we discuss the possible mechanism of calcification and the proper way of treatment in calcified chronic subdural hematoma.