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Hea-Gwang Jeong,Kyo-Beum Lee,Sewan Choi,Woojin Choi IEEE 2010 IEEE TRANSACTIONS ON POWER ELECTRONICS - Vol.25 No.5
<P>The demand for three-phase pulsewidth modulation (PWM) inverters in applications such as power control or grid connecting has been on the increase in recent years. Such inverters are connected to the grid via an L filter or an LCL filter to reduce the harmonics caused by the switching. An LCL filter can reduce the harmonics induced by low switching frequency and generates a satisfactory level of grid-side current using a relatively low inductance, as compared to an L filter. The additional poles introduced by the LC part induces resonance in the system, leading to stability problems; this paper presents a compensation method using power theory to improve these issues, so that the performance of the designed LCL filter system can be improved. The effectiveness of the proposed algorithm is verified by simulations and experiments.</P>
섬다래, 댕댕이나무 및 넌출월귤 종자의 기내발아에 미치는 GA3 처리 효과
이수광 ( Su Gwang Lee ),김효연 ( Hyo Yeon Kim ),구자정 ( Ja Jung Ku ),김현준 ( Hyeon Jun Kim ),정회석 ( Hea Seok Jeong ),신운섭 ( Un Seop Shin ),이기철 ( Ki Cheol Lee ),김현진 ( Hyun Jin Kim ),김성식 ( Sung Sik Kim ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 희귀식물 섬다래(Actinidia rufa (Siebold & Zucc.) Planch. ex Miq.), 댕댕이나무(Lonicera caerulea var. edulis Turcz. ex Herder) 및 넌출월귤(Vaccinium oxycoccus L.)의 기내발아에 미치는 GA3 처리 효과를 살펴보고자 수행되었다. WPM 기본배지로 하여 GA3 농도별로 대조구, 0.1, 0.5, 1.0 mg/L를 첨가하여 제조한 배지를 사용하여 기내발아 실험을 수행하였다. 그 결과 섬다래 종자는 GA3 첨가 농도가 높아질수록 뚜렷한 종자발아 효과를 나타내어 1.0 mg/L GA3 첨가구에서 92% 높은 발아율을 보였으나 대조구에서는 전혀 발아하지 않았다. 댕댕이나무의 기내발아는 6.6∼36.6%의 발아율을 나타내었으며, 1.0 mg/L GA3 첨가구에서 최고 발아율 36.6%로 나타났다. 넌출월귤은 1.0 mg/L GA3 첨가구에서 94%의 가장 높은 발아율을 보였고 대조구 0.1, 0.5 mg/L GA3 첨가구에서 각각 42%, 77% 및 92%의 발아율을 보였다. 이상의 결과를 통해 섬다래와 넌출월귤의 기내발아에는 각각 1.0과 0.5 mg/L GA3 첨가가 적절한 것으로 판단되며, 댕댕이나무는 최고 기내발아율이 36%로 나타나 발아율을 높이기 위한 추가연구가 필요한 것으로 생각된다. The effect of gibberellic acid concentration was studied on the in vitro seed germination of Actinidia rufa, Lonicera caerulea var. edulis, Vaccinium oxycoccus. The WPM basal medium supplemented with various concentrations of GA3 (0.1, 0.5, 1.0 mg/L) were used for in vitro seed germination. In 1.0 mg/L GA3, 92% seed germination of A. rufa. However, there was any seed germination in control. The range of germination of L. caerulea var. edulis was 6.6∼36.6%, optimal condition when 1.0 mg/L GA3 in WPM medium. And in vitro seed germination of V. oxycoccus increased to 42%, 77%, 92%, or 94% in control, 0.1, 0.5 or 1.0 mg/L GA3, respectively. Therefore, in vitro seed germination of A. rufa, L. caerulea var. edulis, V. oxycoccus were enhanced in GA3 supplemented in WPM medium.
섬국수나무와 섬괴불나무의 삽목증식에 미치는 토양 및 PGRs 처리 효과
이수광 ( Su Gwang Lee ),이동준 ( Dong Jun Lee ),김효연 ( Hyo Yeon Kim ),구자정 ( Ja Jung Ku ),김현준 ( Hyeon Jun Kim ),정회석 ( Hea Seok Jeong ),신운섭 ( Un Seop Shin ),이기철 ( Ki Cheol Lee ),김현진 ( Hyun Jin Kim ),김성식 ( Sung 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 희귀식물 섬국수나무(Physocarpus insularis (Nakai) Nakai)와 섬괴불나무(Lonicera insularis Nakai)의 삽목증식에 미치는 토양 및 PGRs의 영향을 살펴보기 위해 수행되었다. 삽목토양은 녹소토와 펄라이트로 달리하였으며, PGRs는 IBA, NAA 100 ppm 한 시간 침지처리, 그리고 루톤분말 처리의 4가지를 달리하였다. 그 결과 섬국수나무는 녹소토 대조구와 루톤 처리구에서 29%의 가장 높은 발근율을 나타내었다. 또한 대조구에서 뿌리수(4.1개), 뿌리길이(5.8 cm) 및 지하생중량(33mg)이 가장 우수하게 나타나 섬국수나무의 삽목증식에는 PGRs처리가 부정적인 영향을 미치는 것으로 생각된다. 반면 섬괴불나무는 녹소토 조건에서 대조구(25%)에 비해 NAA 침지처리(82%)시 발근율이 유의적으로 향상된 결과를 나타내었다. 특히 NAA 100 ppm 침지처리시 뿌리수(7.3개), 뿌리길이(16.9 cm) 및 지하생중량(195 mg)이 가장 우수하게 나타나 녹소토 조건과 NAA 100 ppm 침지처리가 섬괴불나무 삽목증식에 적합한 처리조건인 것으로 판단된다. This study was conducted to investigate the propagation characteristics of Physocarpus insularis (Nakai) Nakai and Lonicera insularis Nakai. The treatment of rooting soil type(Kanumatsuchi, perlite) and PGRs(Rootone, 100 ppm of IBA or NAA). As a result, the highest rooting rate(29%) of P. insularis was obtained from the control and rootone in Kanumatsuchi. And best quality of cutting growth characteristics of P. insularis under control with number of root(4.1), root length(5.8 cm) and root weight(33 mg). Therefore, PGRs were negative effects on cutting of P. insularis. On the other hand, 100 ppm NAA treatment showed the highest rooting rate(82%) than control(25%) of L. insularis with cutting growth characteristics of the number of root(7.3), root length(16.9 cm) and root weight(195 mg) in Kanumatsuchi. A result indicated that treatment 100 ppm NAA and Kanumatsuchi were best treatment in increasing percentage of rooting and other cutting growth characteristics of L. insularis.
Erlotinib Induced Trichomegaly of the Eyelashes
Jeon, Sang-Hoon,Ryu, Jeong-Seon,Choi, Gwang-Seong,Kim, Jung-Soo,Kwon, Hea-Yoon,Kim, Min-Su,Nam, Hae-Seong,Cho, Jae-Hwa,Kwak, Seung-Min,Lee, Hong Lyeol,Kim, Hyun-Jung,Hong, Geun-Jeong The Korean Academy of Tuberculosis and Respiratory 2013 Tuberculosis and Respiratory Diseases Vol.74 No.1
Epithelial growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) have been widely used for non-small-cell lung cancer patients. Its untoward cutaneous effects are largely well known and developed in many patients treated with EGFR TKIs. However trichomegaly of eyelash is rarely reported. Although trichomegaly is not a drug-limiting side effect, it could be troublesome of continuing the treatment because of cosmetic issue or eyeball irritation by long eyelashes. Therefore clinicians are needed to pay attention to this uncommon effect. We herein describe erlotinib induced trichomegaly of eyelashes in a woman with adenocarcinoma of the lung.
Yi-Kyu Kang,Hea-Gwang Jeong,Kyo-Beum Lee,Dong-Choon Lee,Jang-Mok Kim 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.4
This paper presents simple schemes used to estimate the initial rotor position and the d- and q-axis inductances for effective Maximum Torque per Ampere (MTPA) operation in a wind-power system using an IPMSM (Interior Permanent Magnet Synchronous Machine). An IPMSM essentially requires an exact coordinate transformation and accurate inductance values to use a reluctance torque caused by the saliency characteristic. In the proposed high-frequency voltage testing method, there is no voltage drop caused by the resistance and the electromotive force. The initial rotor position and the inductance can be measured through an analysis of the stator current without turning the rotor. The experimental results are presented in order to illustrate the feasibility of the proposed method.
Kang, Yi-Kyu,Jeong, Hea-Gwang,Lee, Kyo-Beum,Lee, Dong-Choon,Kim, Jang-Mok The Korean Institute of Power Electronics 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.4
This paper presents simple schemes used to estimate the initial rotor position and the d- and q-axis inductances for effective Maximum Torque per Ampere (MTPA) operation in a wind-power system using an IPMSM (Interior Permanent Magnet Synchronous Machine). An IPMSM essentially requires an exact coordinate transformation and accurate inductance values to use a reluctance torque caused by the saliency characteristic. In the proposed high-frequency voltage testing method, there is no voltage drop caused by the resistance and the electromotive force. The initial rotor position and the inductance can be measured through an analysis of the stator current without turning the rotor. The experimental results are presented in order to illustrate the feasibility of the proposed method.
Erlotinib Induced Trichomegaly of the Eyelashes
Sang Hoon Jeon,Jeong Seon Ryu,Gwang Seong Choi,Jung Soo Kim,Hea Yoon Kwon,Min Su Kim,Hae Seong Nam,Jae Hwa Cho,Seung Min Kwak,Hong Lyeol Lee,Hyun Jung Kim,Geun Jeong Hong 대한결핵 및 호흡기학회 2013 Tuberculosis and Respiratory Diseases Vol.74 No.1
Epithelial growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) have been widely used for non-small-cell lung cancer patients. Its untoward cutaneous effects are largely well known and developed in many patients treated with EGFR TKIs. However trichomegaly of eyelash is rarely reported. Although trichomegaly is not a drug-limiting side effect, it could be troublesome of continuing the treatment because of cosmetic issue or eyeball irritation by long eyelashes. Therefore clinicians are needed to pay attention to this uncommon effect. We herein describe erlotinib induced trichomegaly of eyelashes in a woman with adenocarcinoma of the lung.
삽수길이에 따른 시로미의 삽목에 미치는 토양 및 IBA 처리 효과
김효연 ( Hyo Yeon Kim ),이수광 ( Su Gwang Lee ),이동준 ( Dong Jun Lee ),신운섭 ( Un Seop Shin ),김현준 ( Hyeon Jun Kim ),정회석 ( Hea Seok Jeong ),구자정 ( Ja Jung Ku ),이기철 ( Ki Cheol Lee ),김현진 ( Hyun Jin Kim ),김성식 ( Sung 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
시로미( Empetrum nigrum var. japonicum K. Koch)는 고산지대(해발 1700∼2000m)에 자생하는 희귀식물로 취약종(VU : Vulnerable)으로 지정되어 있다. 본 연구는 정아를 포함한 녹지삽의 삽수길이에 따른 삽목용토와 식물생장호르몬 처리의 효과를 비교하고자 하였다. 삽수는 정아가 포함된 생지를 2.5, 3.5, 4.5cm의 길이를 달리하여 조제하고, 삽수기부에 IBA(indole-3-butric acid)를 0, 100, 1,000mgL-¹의 농도별로 60분간 침지하였다. 토양종류는 녹소토와 마사토를 사용하였다. 그 결과, 길이 2.5cm 삽수에서 대조구와 IBA 100mgL-¹ 처리구를 녹소토에 삽목한 경우 50%의 발근율로 가장 우수하였다. 생육특성은 녹소토 대조구에서 뿌리수 6개, 뿌리길이 7.43cm, 생중량 67.33mg으로 우수하게 나타났다. 그러나, 삽수길이 3.5cm에서는 발근율이 20% 이하로 낮았으나, 녹소토 대조구에서 뿌리수 10개, 뿌리길이 7.7cm, 생중량 141mg 으로 2.5cm의 삽수 생육특성보다 뚜렷한 차이를 보였다. 따라서, 시로미의 우수한 삽목묘 확보를 위해서는 녹소토에 삽수 크기 2.5∼3.5cm를 삽목하는 것이 효율적인 것으로 판단된다. Empetrum nigrum var. japonicum K. Koch is grows wild to alpine(altitude 1,700∼ 2,000m) as a designated rare plant Vulnerable(VU). This study was conducted to determine the effects of cutting size(2.5, 3.5, 4.5cm), soil type(Kanumatsuchi and Stream sand) and concentration of IBA(100, 1,000mgL.¹). The highest rooting rate(50%) was obtained from cutting size 2.5cm at treatment with control or IBA 100mgL.¹ with cutting growth characteristics number of root(6), root length(7.4mm) and root weight(67mg) in control on Kanumatsuchi. On the other hand, rooting rate was under 20% in cutting size 3.5cm, with cutting growth characteristics number of root(10), root length(7.7mm) and root weight(141mg) in control on Kanumatsuchi. Therefore cutting size 2.5∼3.5cm in control on Kanumatsuchi were better condition for cutting of E. nigrum var. japonicum.