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NaOCl 처리 농도 및 시간에 따른 희귀식물 자란(Bletilla striata Rchb.f.)의 종자 발아 및 활력 연구
정영호,김진기,이하얀,송세규,배기화,Jung, Young Ho,Kim, Jinki,Lee, Hayan,Song, Se-kyu,Bae, Kee Hwa 한국식물생명공학회 2020 식물생명공학회지 Vol.47 No.1
This study was conducted to examine the vitality of Bletilla striata Rchb.f. seed treated with different concentrations sodium hypochlorite (NaOCl) for different lengths of time. This study also examined the effect of NaOCl treatment times and concentrations on swelling formation and seed germination of B. striata seed. The non-treated B. striata seed had the highest survival rate (82.7%) Treatment with more than 1.5% NaOCl negatively affected the seed survival rate, as compared to concentrations of less than 1%. The swelling formation and seed germination percentages were highest (90.1% and 94.1%, respectively) when seeds were treated with 0.5% NaOCl for 20 min. These results can be used as important basic data for the growth and restoration of B. striata and further suggest the possibility of individual restoration in habitats.
두경부암 치료에 따라 발생한 흡인 환자에 대한 다각적 재활운동 치료
정영호,진영주,Jung, Young Ho,Jin, Young Ju 대한후두음성언어의학회 2018 대한후두음성언어의학회지 Vol.29 No.1
Patients who have the head and neck cancer are usually treated by surgery, radiation therapy, chemotherapy, or combinations of them. These treatments can induce variable degree of aspiration with dysphagia. The type and severity of aspiration depends on the size and location of the original tumor, the structures involved, and the treatment modality used for treatment. The management of aspiration after the head and neck cancer's treatment begins with an accurate evaluation for the cause and mechanism of aspiration through modified barium swallow (MBS) and fiberoptic endoscopic examination of swallowing (FEES). Then, the clinician can use postures, maneuvers, and exercises to treat the swallow disorder and to help the patient achieve optimal function. To achieve optimal swallowing without aspiration, multidimensional rehabilitation by various medical personnel is definitely necessary.
정영호,박준범,원태빈,이승신,모지훈,박석원,성명훈,김광현,Jung, Young-Ho,Park, Jun-Beom,Won, Tae-Bin,Lee, Seung-Shin,Mo, Ji-Hun,Park, Seok-Won,Sung, Myung-Whun,Kim, Kwang-Hyun 대한기관식도과학회 1999 大韓氣管食道科學會誌 Vol.5 No.2
Background and Objectives : Provox, a recently developed tracheoesophageal prosthesis, had been widely used for voice rehabilitation after total laryngectomy for its low resistance and easiness of speech ability. But, long-term use of Provox resulted in many complications and resulted in cessation of Provox as a primary method of vocal rehabilitation. The aim of this study is to report Provox-related problems and the long-term results of Provox voice prosthesis. Materials and Methods : Medical records from patients who had undergone total laryngectomy with Provox insertion at seoul National University Hospital between January 1993 and December 1998 were reviewed retrospectively. Results : 36 patients had used 79 Provox voice prostheses during the observed period. The most common complication causing prosthesis change or removal was leakage and/or aspiration, followed by granulation formation, crusting and/or obstruction, and non-function. Median in situ lifetime of Provox was 274 days and 1-year-in situ rate was 31.0% Among 36 patients, 17 patients had undergone tracheoesophageal shunt closure at the last follow-up visit. 10 patients had complications but got along without further treatments, and 1 patient changed to Blom-Singer voice prosthesis. Only 8 patients experienced no complication, and 5 out of whom had several times of Provox change. Conclusion : long-term use of Provox resulted in discontinuation of its use due to complications in many cases. A better voice prosthesis with lower complication rate and longer in situ lifetime is needed.
산업연관표(産業聯關表)를 활용(活用)한 보건산업(保健産業)의 성장요인(成長要因) 분석(分析)(1985~1995년(年)): 제조업종(製造業種)을 중심(中心)으로
정영호 ( Young Ho Jung ) 한국보건경제정책학회(구 한국보건경제학회) 2001 보건경제와 정책연구 Vol.7 No.1
This paper tries to identify the factors that have contributed to the output growth of the health-related industry through 1985-1995. Input-output techniques are used to decompose output growth into five factors: ● changes associated with domestic final demand; ● changes associated with exports; ● changes associated with imports of final goods; ● changes associated with imports of intermediate inputs; ● changes in production techniques. The main results of the analysis can be summarized as follows. The output growth of the health-related industry mainly depended upon the change in the industrial composition of domestic final demand. The effects of export growth and import substitution was not so important factor on the growth of the industry except medical devices sector. Our study suggests that the industrial policy should focus on the export-led and import substitution to stimulate the growth of the health-related industry as can be inferred from the growth pattern of the Information Communication Technology industry.
멀티캐스트 전송을 위한 공용 피드백 채널의 성능 분석 및 파라미터 최적화 설계 방법
정영호(Young-Ho Jung),김병건(Byung-gun Kim) 한국통신학회 2009 韓國通信學會論文誌 Vol.35 No.6
최근 3GPP LTE 및 IEEE 802.16m 등 IMT-Advanced 시스템을 목표로 한 이동통신 표준화에서는 통신망을 이용하여 방송 및 멀티캐스트 (multicast) 데이터를 효율적으로 전송하기 위한 기술 개발이 활발하게 이루어지고 있다. 특히 멀티캐스트 전송에 대해서는 H-ARQ, 적응변조 등을 통해 그룹 내의 사용자 개개인의 요구 성능(QoS) 을 보장해주는 기술이 적극 고려되고 있으나, 피드백 부담을 낮출 수 있는 기술 개발이 필수적으로 필요하다. 본 논문에서는 기존에 제안되었던 멀티캐스트 ACK/NACK 전송을 위한 OOK (On-Off Keying) 기반의 공용피드백 채널에 대한 이론적, 실험적 성능을 분석하고, 이를 바탕으로 원하는 성능을 얻기 위해 필요한 피드백 자원 오버헤드를 최소화 할 수 있는 효율적 공용 피드백 채널의 설계 파라미터 최적화 방법을 제시한다. 이를 통하여 제안하는 파라미터 최적화 방식에 따라 공용 피드백 채널을 설계하는 경우, 기존 3GPP LTE 등에서 사용된 사용자별 피드백 방식에 비하여, 적은 자원 량을 가지고도 높은 신뢰도로 H-ARQ 전송을 위한 ACK/NACK 정보 전송이 가능함을 단위 자원 당 전송 효율을 비교하여 보였다. In the 3GPP LTE and IEEE 802.16m standardizations for IMT-Advanced, the efficient transmission of multicast and broadcast data is one of the important issues to improve system performance. Especially, to guarantee each user's QoS in the multicast group, H-ARQ or adaptive modulation are considered to be adoption, however, reduction of feedback overhead is one of the most important issues. In this paper, performance of the previously proposed OOK (On-Off Keying) based common ACK/NACK feedback channel is analyzed through theoretical analysis and simulation. Based on the results, system parameter optimization methods for common feedback channel are proposed. In addition, through computer simulation, it is shown that the common feedback method according to the proposed feedback parameter optimization can feedback ACK/NACK information for multicast H-ARQ transmission, more reliably than the conventional user dedicated feedback method in 3GPP LTE systems, and can reduce the feedback overhead as well.
증례보고 : Klippel-Feil 증후군 환자의 마취경험
정영호 ( Young Ho Jung ),유병훈 ( Byung Hoon Yoo ),이상석 ( Sang Seok Lee ),우승훈 ( Seoung Hoon Woo ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.51 No.4
We present a 12-year-old female Klippel-Feil syndrome patient who underwent a surgical correction of thoracolumbar scoliosis. The patient had congenital fusion of the cervical vertebrae (C2,3,4,5,6) and showed the classic triad consisting of a low posterior hairline, short neck, and neck motion limitation. Because these patients may have a risk of neurological damage during airway management and subsequent positioning, anesthesiologists need to take care regarding the cervical spine pathology and degree of instability. In this case, fiberoptic bronchoscope guided intubation was performed. We discuss the anesthetic management of Klippel-Feil syndrome patients with a review of the relevant literature. (Korean J Anesthesiol 2006; 51: 480~2)