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Areum Shin,Jun Chul Byun,Su-Kyeong Hwang,Soonhak Kwon,Yun Jeong Lee 대한소아신경학회 2021 대한소아신경학회지 Vol.29 No.1
Purpose: This study investigated the clinical characteristics and risk factors of epilepsy in patients with neurofibromatosis type 1 (NF1) at a tertiary center. Methods: The medical records of 103 children diagnosed with NF1 from February 2009 to July 2019 were retrospectively reviewed. Demographic features, NF1-related features, seizure characteristics, treatment outcomes, and electroencephalography and brain magnetic resonance imaging (MRI) findings were compared between patients with and without epilepsy. Results: Among the 103 patients (median age, 11.5 years; age range, 1.0 to 34.8), 14 (13.6%) had epilepsy. The median age of seizure onset was 5.8 years (range, 1.1 to 18.9). Focal and generalized seizures were observed in nine (64.3%) and six (42.9%) patients, respectively. Five patients (35.7%) had a history of status epilepticus and one of them died of it. Two patients (14.3%) had drug-resistant epilepsy. On brain MRI obtained at the time of seizure onset, seven (50%) patients had unidentified bright objects and three (21.4%) had other structural abnormalities. Learning disability (odds ratio [OR], 4.5; 95% confidence interval [CI], 1.17 to 17.5) and a family history of epilepsy (OR, 39.7; 95% CI, 3.78 to 416.53), but not structural abnormalities, were significant risk factors for epilepsy. Conclusion: Epilepsy was more common in NF1 patients than in the general population. NF1 patients with epilepsy had various seizure types, but exhibited relatively good outcomes. The types of brain abnormalities were not significantly different between patients with and without epilepsy. Our results suggest that mechanisms other than structural brain abnormalities should be considered epileptogenic in NF1 patients.
Kim, Areum,Ahn, Jihoon,Hwang, Hyewon,Lee, Eunsong,Moon, Jooho Royal Society of Chemistry 2017 Nanoscale Vol.9 No.18
<P>A highly stretchable and foldable conductive cord was developed by depositing silver nanowires (AgNWs) on a polyurethane cord. The application of pre-strain to the cord during the deposition of AgNWs resulted in the formation of a wrinkled AgNW layer, thereby inducing structural stability towards stretching and bending. This conductive cord exhibited stable electric conduction under strain values of up to 167% and at a bending radius of 0.3 mm. Also, it could withstand a stretching test of 500 cycles at a strain of 50%.</P>
Building a Compiler Tool-Chain for 24-bit DSP
Seok Joong Hwang,Areum Kim,Huong Giang Nguyen,Seon Wook Kim,Joon-il Lee 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
We developed a compiler tool-chain for a commercial 24-bit DSP whose target application domain is audio signal processing. As DSP processor generally does, its specialized architecture introduces many technical issues on building a compiler tool-chain. In this paper, we discuss about several technical issues we had experienced during the development, and explain how we resolved those issues.
황재훈(Jaehoon Hwang),김장석(Jangsuk Kim),이영선(Youngseon Lee),이재용(Jaeyong Lee),송아름(Areum Song),김준규(Junkyu Kim),박지영(Jiyoung Park),양지원(Jiwon Yang),양혜민(Hyemin Yang),강승호(Seungho Kang),오용제(Yongje Oh),안승모(Sungmo A 한국상고사학회 2016 한국상고사학보 Vol.92 No.-
Old wood effect refers to an error derived from difference between archaeological target date and radiocarbon dates of wood samples. Schiffer (1986) suggested that this effect would lead to radiocarbon dates older than target dates, and that to solve this problem, it is necessary to understand the relationship between archaeological context of dated samples and measured dates. However, there have not been many studies to resolve this problem. To examine old wood effect, we compare radiocarbon dates of wood and bean samples found together in a house in Gahakdong settlement sites, Gwangmyeong. Our experiment shows that old wood effect is not involved in this case. We also collect dates of wood and short-lived plant samples co-found in the same context and compared them. It is suggested that the degree and frequency of old wood effect can vary depending on environmental conditions and contexts. 고목 효과란 목재의 14C를 사용해 연대 측정하는 경우 벌목 시점과 사용 및 탄화가 일어났던 시점 사이에서 연대 편차가 발생하는 현상을 가리킨다. 고목 문제를 처음 제기한 쉬퍼(1986)는 목재 시료의 연대 상향 의 가능성을 경고하고 이를 극복하기 위해 목재 특성과 용도를 비롯한 고고학적 맥락과 관련된 탄소연대에 대한 이해가 선결되어야 함을 강조하였다. 하지만, 고목 효과를 어떤 수준에서 이해하고 적용할 것인지에 대한 실증적 연구는 많지 않았다. 이러한 문제의 해결을 위해, 본연구팀에서는 광명 가학동 청동기시대 주거지를 대상으로 고목 효과를 살필 수 있는 목재 11점과 종자 시료 39점의 탄소연대 비교 실험을 실시하였다. 분석결과, 가학동 1호주거지에서의 고목 효과는 통계적으로 볼 때 존재하지 않는 것으로 확인되었다. 본고는 이에 더하여 우리나라 전체 탄소연대 자료에서의 고목 효과를 확인하기 위해 동일 유구 내 종자와 목탄의 공반 사례를 집성하여 양자 간 편차를 검토하였다. 분석 결과, 한국고고학에서 고목효과가 근본적으로 개입되어 있지는 않다는 점이 드러났다. 다만, 원삼국~통일신라시대의 경우 목탄 이 종자에 비해 이르게 측정된 사례가 많은데 반해, 신석기~청동기시대 자료에서는 양자 간 편 차를 확인할 수 없었다. 목탄 연대치가 종자의 연대치보다 이른 모든 사례가 고목 효과인지 아니 면 다른 요인이 개입되었는지를 단적으로 판정할 수는 없지만, 원삼국-통일신라시대 자료에서 확인되는 종자와 목탄 간 편차는 고목 문제가 문화적, 환경적 조건에 따라 달리 나타날 가능성을 제시하는 것으로 추정해 볼 수 있다.
항우울제 복용환자에 대한 한의치료와 M&L심리치료 활용 2례보고
황선혜 ( Seon-hye Hwang ),박아름 ( Areum Park ),송건의 ( Gun-eui Song ),임교민 ( Gyo-min Lim ),모민주 ( Min-ju Mo ),박세진 ( Se-jin Park ) 대한한방신경정신과학회 2017 동의신경정신과학회지 Vol.28 No.2
Objectives: The purpose of this study is to show that patients taking antidepressants significantly respond to Korean medical treatments and M&L psychotherapy. Methods: We treated two patients with Korean medical treatments (acupuncture, moxibustion and Herbal Medicine) and psychotherapy including M&L psychotherapy and Li-Gyeung-Byun-Qi therapy. The patients were diagnosed based on DSM-IV diagnostic criteria for MDD. Beck`s Depression Inventory (BDI), Beck`s Anxiety Inventory (BAI), State-Trait Anxiety Inventory (STAI), Pittsburgh Sleep Quality Index (PSQI), and Visual Analogue Scale (VAS) were used to evaluate the patients. Results: The following observations were made after treatments: Case 1: the patient showed significant improvement in Beck`s Depression Inventory (BDI), Beck`s Anxiety Inventory (BAI), and Visual Analogue Scale (VAS). Case 2: the patient showed significant improvement in Beck`s Depression Inventory (BDI), State-Trait Anxiety Inventory (STAI), Pittsburgh Sleep Quality Index (PSQI), and Visual Analogue Scale (VAS). Conclusions: These results suggest that Korean medical treatments and M&L psychotherapy might be effective for treating patients suffering from MDD.