Various Pollen Morphology in Hibiscus syriacus

배성환,Adnan Younis,황윤정,임기병 한국화훼학회 2015 화훼연구 Vol.23 No.3

The taxonomic importance of pollen morphology in family Malvaceae had long been acknowledged as it provides the basis for palynological and phylogenetic analysis. In present study, pollen morphological characteristics of various Hibiscus syriacus cultivars were examined. The objective of this study was to provide comprehensive evidence on pollen morphology and to determine pollen morphological diversity in cultivars of H. syriacus that would be useful for plant taxonomy and classification. To get a clear insights of the pollen morphology, scanning electron microscopy (SEM) was carried out. It has been recorded that the pollen diameter of 16 cultivars of H. syriacus ranges from 108.81 to 172.15 μm. The maximum pollen size was reported from the cultivar ‘Chongdansim’ followed by the cultivar ‘Paedal’. The maximum spine exine length was reported from ‘Jabae’ (25.29 μm) followed by ‘Collie mullens’ (23.25 μm), whereas the minimum value was recorded from ‘Paedal’ (8.16 μm). It is apparent from this study that pollen morphology of various H. syriacus cultivars was fairly uniform, and in almost all studied cultivars the pollen shape was spheroidal. The spines were present in all studied cultivars and varied considerably among the cultivars. The pollen spine features presented notable variations which were of great significance at both specific and generic levels, and has also been helpful in understanding the process of spine evolution within H. syriacus. The maximum distance between spines was observed from cultivar ‘Gyewolhyang’ that had distance of 45.03 μm. The morphological characteristics of pollen studied in this study could be useful in performing a more efficient Hibiscus hybridization and breeding in future.

한국의 생태계보존을 위한 개선 방향

배성환 환경보전협회 1997 환경정보 Vol.19 No.6

근피피판과 천공지피판을 이용한 둔부 주위 욕창 재건술의 술후 결과에 대한 고찰

배성환,남수봉,김경훈,이재우,오흥찬,최수종,배용찬 대한성형외과학회 2011 Archives of Plastic Surgery Vol.38 No.6

Purpose: Perforator flaps have been widely used for reconstruction of pressure sores because they have many benefits, especially reducing tension. Otherwise in order to prevent recurrence of a pressure sore, sufficient thickness of a flap is desirable, so a musculocutaneous flap is also useful for reconstruction of a pressure sore. Therefore, the authors considered about the postoperative results of reconstruction of pressure sores between using perforator flaps and musculocutaneous flaps. Methods: In this study, 33 patients (46 flaps) who underwent reconstructive operation of pressure sores from January 2007 to February 2011 were reviewed. Patients operated by using perforator flaps were 18 (18 flaps), and musculocutaneous flaps were 17 (28 flaps). We studied postoperative complications and recurrence. Results: We experienced five patients (10 flaps) with complications or recurrences who were operated using musculocutaneous flaps and one patient using a perforator flap. One case using a perforator flap stemmed from dehiscence caused by a urinary fistula occurring in two months after the surgery. Among ten cases using musculocutaneous flaps, one case was caused by total necrosis of flap, five cases by partial necrosis of flap and dehiscence,and four cases by recurrences during follow-up period. Conclusion: Even if more cases were required, it can be more considerable to operate using the perforator flap rather than the musculocutaneous flap to reduce the complication or recurrence of pressure sore.

CMOS VLSI에서 트랜지스터 합선 고장을 위한 효율적인 등가 고장 중첩 알고리즘

배성환 대한전자공학회 2003 電子工學會論文誌-SD (Semiconductor and devices) Vol.40 No.12

IDDQ testing is indispensable in improving quality and reliability of CMOS VLSI circuits. But the major problem of IDDQ testing is slow testing speed due to time-consuming IDDQ current measurement. So one requirement is to reduce the number of target faults or to make the test sets compact in fault model. In this paper, we consider equivalent fault collapsing for transistor short faults, a fault model often used in IDDQ testing and propose an efficient algorithm for reducing the number of faults that need to be considered by equivalent fault collapsing. Experimental results for ISCAS benchmark circuits show the effectiveness of the proposed method. IDDQ 테스팅은 CMOS VLSI 회로의 품질 및 신뢰성 향상에 중요한 테스트 방식이다. 그러나 상대적으로 느린 IDDQ 테스트를 위해서는 고려한 고장 모델에서 발생 가능한 고장의 수를 감소하거나 가능한 적은 수의 테스트 패턴을 유지하는 게 필요하다. 본 논문에서는 IDDQ 테스팅에 자주 이용되는 트랜지스터 합선 고장 모델에서 발생 가능한 고장의 수를 효과적으로 감소시킬 수 있는 효율적인 등가 고장 중첩 알고리즘을 제안한다. ISCAS 벤치마크 회로의 모의 실험을 통하여 제안된 방식의 우수한 성능을 확인하였다.

Analysis of Frequency of Use of Different Scar Assessment Scales Based on the Scar Condition and Treatment Method

배성환,배용찬 대한성형외과학회 2014 Archives of Plastic Surgery Vol.41 No.2

Analysis of scars in various conditions is essential, but no consensus had been reached on the scar assessment scale to select for a given condition. We reviewed papers to determine the scar assessment scale selected depending on the scar condition and treatment method. We searched PubMed for articles published since 2000 with the contents of the scar evaluation using a scar assessment scale with a Journal Citation Report impact factor >0.5. Among them, 96 articles that conducted a scar evaluation using a scar assessment scale were reviewed and analyzed. The scar assessment scales were identified and organized by various criteria. Among the types of scar assessment scales, the Patient and Observer Scar Assessment Scale (POSAS) was found to be the most frequently used scale. As for the assessment of newly developed operative scars, the POSAS was most used. Meanwhile, for categories depending on the treatment methods for preexisting scars, the Vancouver Scar Scale (VSS) was used in 6 studies following a laser treatment, the POSAS was used in 7 studies following surgical treatment, and the POSAS was used in 7 studies following a conservative treatment. Within the 12 categories of scar status, the VSS showed the highest frequency in 6 categories and the POSAS showed the highest frequency in the other 6 categories. According to our reviews, the POSAS and VSS are the most frequently used scar assessment scales. In the future, an optimal, universal scar scoring system is needed in order to better evaluate and treat pathologic scarring.

전류 테스팅을 위한 객체 기반의 무해고장 검출 기법

배성환,김관웅,전병실 한국통신학회 2002 韓國通信學會論文誌 Vol.27 No.1C

A novel technique for placing titanium mesh with porous polyethylene via the endoscopic transnasal approach into the orbit for medial orbital wall fractures

배성환,Dae Kyun Jeong,Ju Young Go,박희성,Joo Hyoung Kim,Jae Woo Lee,강태우 대한성형외과학회 2019 Archives of Plastic Surgery Vol.46 No.5

Background The endoscopic transnasal approach is widely used for reconstructing the medial orbital wall by filling it with a silicone sheet or Merocel, but this technique has the disadvantage of retaining the packing for a long time. To overcome this drawback, a method of positioning an absorbable plate in the orbit has been introduced, but there is a risk of defect recurrence after the plate is absorbed. Here, the authors report the results of a novel surgical technique of placing a nonabsorbable titanium mesh with porous polyethylene into the orbit through the endoscopic transnasal approach. Methods Fourteen patients underwent surgery using the endoscopic transnasal approach. Preoperative computed tomography (CT) was used to calculate the size of the bone defect due to the fracture, and the titanium mesh was designed to be shorter than the anteroposterior length of the defect and longer than its height. The titanium mesh was inserted into the orbit under an endoscopic view. The authors then confirmed that the titanium mesh supported the orbital contents by pressing the eyeball and finished the operation. Immediately after surgery, CT results were evaluated. Results Postoperative CT scans confirmed that the titanium mesh was well-inserted and in the correct position. All patients were discharged without any complications. Conclusions We obtained satisfactory results by inserting a titanium mesh with porous polyethylene into the orbit via the transnasal approach endoscopically.

합선고장을 검출하기 위한 IDDQ 테스트 패턴 생성에 관한 연구

배성환,김대익,전병실 한국통신학회 2000 韓國通信學會論文誌 Vol.25 No.12

IDDQ 테스팅은 CMOS에서 발생 빈도가 가장 높은 합선고장을 효과적으로 검출할 수 있는 기법이다. 본 논문에서는 테스트 대상 회로의 게이트간에 발생 가능한 모든 단락을 고려하여, 이러한 결함을 효과적으로 검출하기 위한 테스트 패턴 생성기와 고장 시뮬레이터를 구현하였다. 구현된 테스트 패턴 생성기와 고장 시뮬레이터는 O(n2)의 복잡도를 가지는 합선고장을 효과적으로 표현하기 위한 기법과 제안된 테스트 패턴 생성 알고리즘 및 고장 collapsing 알고리즘을 이용하여 빠른 고장 시뮬레이션 수행시간과 높은 고장 검출률을 유지하면서 적은 수의 테스트 패턴의 생성이 가능하다. ISCAS 벤치마크 회로에 대한 실험을 통하여 기존의 다른 방식보다 성능이 우수함을 보여주었다.

Comparative Morphological Analysis of Native and Exotic Cultivars of Hibiscus syriacus

배성환,아드난 유니스,황윤정,임기병 한국화훼학회 2015 화훼연구 Vol.23 No.4

Agro-morphological characterization of Hibiscus germplasm is a fundamental prerequisite to initiate plant breeding programs. The prime aim of this study was to characterize 107 Hibiscus syriacus genotypes using agromorphological characteristics and to collect useful data to facilitate the breeders for H. syriacus breeding programs. In this study, it has been recorded that this species appears to have innumerable variability in the morphological characteristics among Korean and exotic cultivars. Plant height of Korean and exotic H. syriacus cultivars were recorded and data revealed that the maximum plant height (143 cm) was recorded in ‘Woodbridge’ which had tall-erect plant shape. ‘Serenade’ and ‘Saemaeul’ cultivars had vigorous growth and had plant height of 141 and 137 cm, respectively and both had tall-erect plant shape. The diameters of H. syriacus flower ranged from 4.1 cm in ‘Kakchang’ to 9.4 cm in ‘Pyonghwa’. The data analysis exhibited that analysis flowers of ~ 86% of Korean cultivars had single type of flower’s form compared to exotic cultivars (~ 61%). The data related to flower shape showed that among Korean native cultivars the maximum plants (52.1%) had intermediate type of flowers followed by bowl (26.1%) and flat type (21.8%). Similar trend in exotic cultivars were observed for flower shape. In case of petal shape among total cultivars studied, 27.9% native H. syriacus plants had broard type of petals whereas 17.7 exotic cultivars had intermediate type of petals. Present results indicated high variability among H. syriacus cultivars, which presents great significance for Hibiscus breeding programs and for genetic studies in order to develop new varieties of H. syriacus.

Magnetic Resonance Imaging (MRI) of a Hypertrophy of Cartilage and Simultaneous Regeneration of a Damaged Meniscus after Autologous Bone Marrow Aspirates Concentrate (BMAC) Transplantation: a Case Report and Literature Review

배성환,김현주,오은선,황지영,홍성식,황정화 대한자기공명의과학회 2017 Investigative Magnetic Resonance Imaging Vol.21 No.3

Bone marrow aspirates concentrate (BMAC) transplantation is a well-known technique for cartilage regeneration with good clinical outcomes for symptoms in patients with osteoarthritis (OA). Magnetic resonance imaging (MRI) has an important role in evaluating the degree of cartilage repair in cartilage regeneration therapy instead of a second assessment via an arthroscopy. We experienced a case of hypertrophic regeneration of the cartilage and a presumed simultaneous regeneration of the posterior horn of the lateral meniscus after BMAC transplantation for a cartilage defect at the lateral tibial and femoral condyle. This report provides the details of a case of an unusual treatment response after a BMAC transplant. This report is the first of its kind to demonstrate a MR image that displays the simultaneous regeneration of the cartilage and meniscus with a differentiation ability of the mesenchymal stem cell to the desired cell lineage.