Charge Transport and Thermoelectric Properties of Ce1−zNdzFe4−xCoxSb12 Skutterudites

송권민,신동길,Il-Ho Kim 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.5

Ce1−zNdzFe4−xCoxSb12 skutterudites were prepared by encapsulated melting, quenching, annealing, and hot pressing. The skutterudite phase could be successfully synthesized; however, a small amount of the secondary phase FeSb2 was also obtained. Scanning electron microscopic analysis indicated the presence of (Ce,Nd)Sb2 phases in the Co-substituted specimens (x = 0.5). The electrical conductivity decreased with an increase in temperature, implying a degenerate semiconductor behavior. The electrical conductivity also decreased with an increase in the Nd and the Co contents. All specimens exhibited p-type characteristics with positive values for the Hall coefficient and the Seebeck coefficient. The Seebeck coefficients increased with an increase in temperature, with the maximum values obtained at temperatures between 723 K and 823 K. The power factor (PF) increased with a decrease in the Co content, and Ce0.75Nd0.25Fe4Sb12 exhibited a maximum PF value of 3.1 mWm−1K−2 at 823 K. The electronic thermal conductivity decreased with an increase in the Nd and the Co contents, and the lattice thermal conductivity decreased with a decrease in the Ce and the Co contents. The thermal conductivity increased at temperatures above 623 K because of bipolar conduction. A maximum dimensionless figure of merit (ZT) value of 0.74 was obtained at 723 K for Ce0.25Nd0.75Fe4Sb12.

Synthesis and Thermoelectric Properties of Double-filled La1−zNdzFe4−xCoxSb12 Skutterudites

송권민,신동길,김일호 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.9

La1−zNdzFe4−xCoxSb12 skutterudites were prepared by using melting, quenching, annealing, and hot pressing. The major phase was the skutterudite phase but small amounts of FeSb2 phases were observed. In addition, especially for the Co-compensated specimens (x = 0.5), (La,Nd)Sb2 phases existed. The electrical conductivity decreased with increasing temperature, showing a degenerate semiconductor behavior. The electrical conductivity decreased with increasing La and Co contents due to a decrease in the carrier concentration. All specimens showed p-type characteristics, having positive signs of the Seebeck coefficient and the Hall coefficient. The Seebeck coefficient increased with increasing temperature and reached a maximum value at 823 K. The power factor (PF) increased with decreasing Co content, and La0.75Nd0.25Fe4Sb12 showed a peak value of the PF = 3.0 mWm−1K2 at 823 K. The electronic thermal conductivity decreased with increasing Co content, and for a fixed Co content, the lattice thermal conductivity decreased with increasing filling fraction of Nd. The thermal conductivity increased due to bipolar conduction at temperatures above 623 K. The dimensionless figure of merit (ZT) had a maximum value of ZT = 0.82 at 823 K for La0.75Nd0.25Fe4Sb12.

경복궁 자경전 꽃담에 나타난 화훼식물과 상징성

권민형,송인정,박천호 경상대학교 농업생명과학연구원 2012 농업생명과학연구 Vol.46 No.2

경복궁 자경전 서쪽 꽃담 도상에 나타난 주소재의 화훼종류와 상징성을 알아보기 위해 2010년 7월~2011년 3월까지 도상에 그려져 있는 식물을 원예학적인 식물 분류를 통하여 식물종류와 상징성을 조사한 결과는 다음과 같다. 도상의 좌측에서부터 우측으로 번호를 붙여서 1부터 8까지 그림을 분석한 결과 도상 1은 매화, 2는 복숭아, 3은 모란, 4는 석류, 5와 6은 국화. 7은 진달래, 8은 대나무인 것으로 나타났다. 이들 8종의 상징성은 장수 4회, 다산 3회, 지조와 절개 2개, 부귀, 화목 1회인 것으로 나타났다. 따라서 이조 왕실의 단명을 장수의 꽃으로 표현하면서 손이 귀한 왕실의 현상에 비추어 다산의 의미를 주어 조선왕조의 영원함을 상징적으로 취한 표현으로 본다. 그러나 세속의 변화에도 지조가 있는 왕가를 원했던 상징성도 있다. 동반소재로는 새와 보름달 각 1회, 나비 가 5회로 나타났는데 여기서 새와 나비는 자유분방함과 화목을 의미하여 궁궐에 여인들이 자유롭게 사랑하면서도 화목한 나비 같은 왕실의 가족관계를 갖기를 원한 것으로 상징성을 볼 수가 있었다. 도상에 나타난 나무들은 양화소록에 근거해보면 모두 1-2등급의 식물이 그려져 있는 것을 알 수가 있었다. This is a study on the flower pattern artwork of the west wall of the Jagyeongjeon in Gyeongbokgung to find out the type of plants and flowers represented and their symbolism. The research was conducted from July 2010 to March 2011 and the artwork classified on the basis of its horticultural traits. A number was assigned to each pattern for analysis: No. 1 is Prunus mume, No. 2 is Prunus persica, No. 3 is Paeonia suffruticosa, No. 4 is Punica granatum, No. 5 and 6 is Dendranthema grandiflora, No. 7 is Rhododendron mucronu and No. 8 is Phyllostachys bambusoides. These 8 flower patterns symbolize longevity and fecundity and their presense around the Jagyeongjeon helped to bestow good fortune on the royal family so that they might live long lives and bear many children. 4 artworks symbolize longevity, 2 artworks symbolize integrity and 1 artwork symbolizes wealth and happiness. There is also symbolism of the need to have constancy in a royal household even during secular change. Out of the 8 artworks, the imagery of a bird and a moon is represented only once, but the image of a butterfly is represented five times in the surrounding elements. The bird and butterfly symbolise freedom and happiness from free love. Women in the palace are like a butterfly wanted to be like love as a freedom and have a free and open relationship like a butterfly. But a harmonious relationship between the royal family wanted to have a symbolic meaning that could be seen of the symbolistic. Based on the "Yangwhasorok"only plants with the highest values, from the 1st and 2nd grades, were used in the artwork of the west wall of the Jagyeongjeon.

각성하 굴곡성기관지경 삽관술이 실패한 하악골소체증(Mandibular Microsomia) 환자에서 Airtraq Optical Laryngoscope의 유용성

송재격 ( Jae Gyok Song ),권민아 ( Min A Kwon ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.3

Tracheal intubation with rocuronium using a “modified timing principle”

권민아,송재격,김주리 대한마취통증의학회 2013 Korean Journal of Anesthesiology Vol.64 No.3

Background: Rapid sequence induction (RSI) is indicated in various situations. Succinylcholine has been the muscle relaxant of choice for RSI, and rocuronium has become an alternative medicine for patients who cannot be administered succinylcholine for various reasons. Although rocuronium has the most rapid onset time among non-depolarizing muscle relaxants, the standard dose of rocuronium (0.6 mg/kg) takes 60 seconds to achieve appropriate muscle relaxation. We evaluated intubating conditions using the “modified timing principle” with rocuronium and succinylcholine. Methods: In this prospective controlled blinded study, all patients received 1.5 μg/kg fentanyl intravenously with preoxygenation for 2 minutes and were randomized to receive 0.6 mg/kg rocuronium followed by 1.5 mg/kg propofol or 1.5 mg/kg propofol and 1.5 mg/kg succinylcholine. The rocuronium group was intubated just after confirming loss of consciousness, and the succinylcholine group was intubated 1 minute after injecting succinylcholine. Intubation condition, timing of events, and complications were recorded. Results: All patients were successfully intubated in both groups. Apnea time of the rocuronium group (38.5 seconds) was significantly shorter than that in the succinylcholine group (100.7 seconds). No significant differences were observed in loss of consciousness time or intubation time. The succinylcholine group tended to show better intubation conditions, but no significant difference was observed. None of the patients complained awareness of the intubation procedure or had respiratory difficulty during a postoperative interview. Conclusions: The modified RSI with rocuronium showed shorter intubation sequence, acceptable intubation conditions, and a similar level of complications compared to those of conventional RSI with succinylcholine.

각성하 굴곡성기관지경 삽관술이 실패한 하악골소체증(Mandibular Microsomia) 환자에서 Airtraq Optical Laryngoscope의 유용성 —증례보고—

송재격,권민아 대한마취통증의학회 2008 Korean Journal of Anesthesiology Vol.53 No.3

We report here the successful use of the AirtraqⓇ optical laryngoscope (AOL) as a rescue device following failed awake flexible fiberoptic nasotracheal intubation of a patient with severe mandibular microsomia. We attempted awake fiberoptic nasotracheal intubation following topical anesthesia with 4% lidocaine spray three times to induce general anesthesia for distraction osteogenesis of mandibular bone. However, due to a shallow pharyngeal cavity and cranially displaced larynx, we failed to locate the larynx each time and were therefore not able to intubate the patient. Awake orotracheal intubation using the AOL allowed us to easily intubate the patient. Therefore, we recommend that the AOL be used as a rescue airway device for intubation of difficult airways.

자경전 꽃담에 나타난 화훼식물과 상징

권민형(Min Hyeong Kwon),송인정(In Jung Song),박천호(Chun Ho Pak) 한국원예학회 2009 한국원예학회 학술발표요지 Vol.2009 No.5

Analgesic effects of ultrasound-guided four-quadrant transabdominal plane block in patients with cytoreductive surgery with hyperthermic intraperitoneal chemotherapy: a prospective, randomized, controlled study

송재격,Choi Nayoung,Kang Minji,지성미,김동욱,권민아 대한마취통증의학회 2022 Anesthesia and pain medicine Vol.17 No.1

Background: Postoperative pain occurring after cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC) is difficult to control because of extensive surgical injuries and long incisions. We assessed whether the addition of a four-quadrant transabdominal plane (4Q-TAP) block could help in analgesic control.Methods: Seventy-two patients scheduled to undergo elective CRS with HIPEC and intravenous patient-controlled analgesia (IV PCA) were enrolled. The patients received 4Q-TAP blocks in a 10 ml mixture of 2% lidocaine and 0.75% ropivacaine per site (4Q-TAP group, n = 36) or normal saline (control group, n = 33). Oxycodone in the post-anesthesia care unit (PACU) and pethidine or tramadol in the ward were used as rescue analgesics. The primary outcome was less than 3 times of rescue analgesic administration (%) in the ward for 5 postoperative days. Secondary endpoints included oxycodone requirement in PACU, fentanyl doses of IV PCA, morphine milligram equivalent (MME) of total opioid use, hospital stay, and postoperative complications. Results: During 5 postoperative days, there was no difference in pain scores and total rescue analgesic administration between two groups. However, the use of oxycodone in PACU (P = 0.011), fentanyl requirement in IV PCA (P = 0.029), and MME/kg of total opioid use (median, 2.35 vs. 3.21 mg/kg, P = 0.009) were significantly smaller in the 4Q-TAP group. Hospital stay and incidence of postoperative morbidity were similar in both groups. Conclusions: The 4Q-TAP block enhanced multimodal analgesia and decreased opioid requirements in patients with CRS with HIPEC, but did not change postoperative recovery outcomes.

Difficult airway management in a case with lingual tonsil hypertrophy and temporo-mandibular joint partial ankylosis

권민아,송재격,박기근 대한마취통증의학회 2013 Korean Journal of Anesthesiology Vol.65 No.4

경복궁 자경전 꽃담에 나타난 화훼식물과 상징성

권민형,송인정,박천호 경상대학교 농업생명과학연구원 2012 농업생명과학연구 Vol.46 No.2

This is a study on the flower pattern artwork of the west wall of the Jagyeongjeon in Gyeongbokgung to find out the type of plants and flowers represented and their symbolism. The research was conducted from July 2010 to March 2011 and the artwork classified on the basis of its horticultural traits. A number was assigned to each pattern for analysis: No. 1 is Prunus mume, No. 2 is Prunus persica, No. 3 is Paeonia suffruticosa, No. 4 is Punica granatum, No. 5 and 6 is Dendranthema grandiflora, No. 7 is Rhododendron mucronu and No. 8 is Phyllostachys bambusoides. These 8 flower patterns symbolize longevity and fecundity and their presense around the Jagyeongjeon helped to bestow good fortune on the royal family so that they might live long lives and bear many children. 4 artworks symbolize longevity, 2 artworks symbolize integrity and 1 artwork symbolizes wealth and happiness. There is also symbolism of the need to have constancy in a royal household even during secular change. Out of the 8 artworks, the imagery of a bird and a moon is represented only once, but the image of a butterfly is represented five times in the surrounding elements. The bird and butterfly symbolise freedom and happiness from free love. Women in the palace are like a butterfly wanted to be like love as a freedom and have a free and open relationship like a butterfly. But a harmonious relationship between the royal family wanted to have a symbolic meaning that could be seen of the symbolistic. Based on the "Yangwhasorok"only plants with the highest values, from the 1st and 2nd grades, were used in the artwork of the west wall of the Jagyeongjeon. 경복궁 자경전 서쪽 꽃담 도상에 나타난 주소재의 화훼종류와 상징성을 알아보기 위해 2010년 7월~2011년 3월까지 도상에 그려져 있는 식물을 원예학적인 식물 분류를 통하여 식물종류와 상징성을 조사한 결과는 다음과 같다. 도상의 좌측에서부터 우측으로 번호를 붙여서 1부터 8까지 그림을 분석한 결과 도상 1은 매화, 2는 복숭아, 3은 모란, 4는 석류, 5와 6은 국화. 7은 진달래, 8은 대나무인 것으로 나타났다. 이들 8종의 상징성은 장수 4회, 다산 3회, 지조와 절개 2개, 부귀, 화목 1회인 것으로 나타났다. 따라서 이조 왕실의 단명을 장수의 꽃으로 표현하면서 손이 귀한 왕실의 현상에 비추어 다산의 의미를 주어 조선왕조의 영원함을 상징적으로 취한 표현으로 본다. 그러나 세속의 변화에도 지조가 있는 왕가를 원했던 상징성도 있다. 동반소재로는 새와 보름달 각 1회, 나비 가 5회로 나타났는데 여기서 새와 나비는 자유분방함과 화목을 의미하여 궁궐에 여인들이 자유롭게 사랑하면서도 화목한 나비 같은 왕실의 가족관계를 갖기를 원한 것으로 상징성을 볼 수가 있었다. 도상에 나타난 나무들은 양화소록에 근거해보면 모두 1-2등급의 식물이 그려져 있는 것을 알 수가 있었다.