• 충청수학회지
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• 제27권2호
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• pp.277-286
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• 2014

We define the pentagonal fuzzy sets and generalize the results of addition, subtraction, multiplication, and division based on the Zadeh's extension principle for two pentagonal fuzzy sets. In addtion, we find the condition that the result of addition or subtraction for two pentagonal fuzzy sets becomes a triangular fuzzy number and give some example.

• Kyungpook Mathematical Journal
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• 제58권4호
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• pp.599-613
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• 2018

We study a generalization of the classical Pentagonal Number Theorem and its applications. We derive new identities for certain infinite series, recurrence relations and convolution sums for certain restricted partitions and divisor sums. We also derive new identities for Bell polynomials.

• Archives of Plastic Surgery
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• 제34권1호
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• pp.64-69
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• 2007

Purpose: The key of treatment in syndactyly is to separate the fused digits safely, and to create a normal web space with enough cutaneous coverage. Despite many techniques have described the correction of syndactyly, skin graft still remains the annoying one. We designed the pentagonal flap from hand dorsum to reconstruct the web space reliably and try to minimize the need for skin graft. Methods: Between July 2003 and August 2005, six cases of syndactyly were corrected at UCLA Medical Center and Hallym University Sacred Heart Hospital using dorsal pentagonal flap for web space reconstruction and straight incisions for the sides of digits to minimize the need for skin graft. The proximal edge of the pentagonal flap was designed in V shape to allow for easy closure of the donor site after advancement. The pentagonal flap was advanced volarly with the underlying dermofat tissues to form a digital web. In some cases, skin defects were unavoidable and covered with full thickness skin graft from the inguinal area. Results: Syndactyly were seen in 4 cases of Apert syndrome, 1 postburn scar webbing with PIP joint contracture and 1 recurrence after the incomplete reconstruction. In all Apert syndrome, straight line incision was used along the sides of the fingers and skin graft was needed. But, in 2 cases of incomplete type, we could save the need for skin graft only for the correction of syndactyly. We could get a good looking web space without any complications such as flap or graft loss. Conclusion: As a modification of Sherif's V-Y dorsal metacarpal flap, we believe pentagonal flap could be one of the easiest and safest way to reconstruct the web space of syndactyly in functional and cosmetic standpoint.

• Bulletin of the Korean Chemical Society
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• 제35권3호
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• pp.958-960
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• 2014

• 한국진공학회지
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• 제11권1호
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• pp.59-67
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• 2002

본 연구에서는 분자동력학 시뮬레이션을 이용하여 구리 나노와이어의 구조적 특성에 관하여 연구하였다. 매우 가는 구리 나노와이어의 구조는 면심입방격자 구조와는 다른 원통형 다중 껍질 구조를 가지며 상온에서 안정한 구조를 유지하였다. 원통형 다중껍질 나노기둥 및 나노와이어 확장 변형에 따른 장력의 변화에 관한 연구에서 오각형 NLC(needle-like crystal) 구조가 관찰되었다. 오각형 NLC 나노와이어 구조의 특성은 기본구성단위가 면심입방격자 구조이므로 안정된 구조라는 것을 연구하였다.

• 한국어류학회지
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• 제6권2호
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• pp.160-171
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• 1994

놀래기과(科) (family Labridae) 어류의 측선(測線) 감각공(感覺孔) 비늘의 형태(形態)는 타원형 (ellipse), 5각형 (pentagonal), 6각형 (hexagonal)의 3가지형으로 분류될 수 있었으며 대부분이 6각형을 나타내었는데 실용치 (Cirrhilabrus temminckii)가 타원형을 나타내었고 옥두놀래기 (Xyrichtys dea), 호박돔 (Choerodon azurio), 흑돔 (Semicossyphus reticulatus), 사랑놀래기 (Bodianus oxycephalus)가 5각형을 나타내었다. 6각형인 황놀래기 (Pseudolabrus japonicus), 놀래기 (Halichoeres tenuispinnis)는 비교적 수심이 깊은곳에 서식하며 주위환경에 잘 반응하는 종으로 이들의 감각관(感覺管)은 가늘고 긴 감각기(感覺技)가 잘 발달되어 있는 반면 5각형의 사랑놀래기, 혹돔과 6각형인 청줄청소놀래기 (Labroides dimidiatus), 꼬치놀래기 (Cheilio inermis), 실놀래기 (Suezichthys gracilis), 무지개놀래기 (Stethojulis interupta terina), 용치놀래기 (Halichoeres poecilopterus)는 감각관(感覺管)이 비교적 크고 감각기(感覺技)의 분지가 적어서 원시형을 나타내고 있었다. 또한 감각공(感覺孔)의 크기는 흑돔, 꼬치놀래기, 청줄청소놀래기, 놀래기가 비늘폭의 25.0 %이상으로 다른 놀래기과(科) 어류(魚類)의 12.5%보다 상대적으로 컸으며 반면 옥두놀래기인 경우 5.8 %로 작았다. 이러한 놀래기과(科) 어류(魚類)가 가진 측선감각공(側線感覺孔)의 다양한 형태는 이들의 서식(棲息) 환경과 측선(測線) 감각공(感覺孔) 비늘의 감각관(感覺管)의 발달 사이에 깊은 관계가 있음을 알 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제21권10호
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• pp.953-954
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• 2000

The equilibrium geometrical structures of silver atom clusters at their electronic ground states have been theo-retically determined by using the nonrelativistic semiempirical INDO/1 method. The clusters investigated are Agn, Agn+, and Agn- (n = 7 , 8, 9). In order to find the most stable structure, i.e., the global minimum in energy hypersurface, geometry optimization and energy calculation processes have been repeatedly performed for all the possible graphical models by changing the bond parameters (resonance integral values). The heptamers are pentagonal bipyramidal-Ag7(D5h), Ag7+ (D5h), Ag7- (D5h); the octamers are pentagonal bipyramidal with one atom capped-Ag8(D2d), Ag8+ (Cs), Ag8- (D2d); the nonamers are pentagonal bipyramidal with two atoms capped -Ag9(C2v), Ag9+ (C2v), Ag9- (C2v). Our structures are in good agreement with those by ab initio calculations ex-cept for the anionic Ag9- cluster. And it is noted that the INDO/1 method can accurately predict the Ag cluster geometries when a proper set of bond parameters is used.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1998년도 Proceedings of International Workshop on Advanced Image Technology
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• pp.141-146
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• 1998

Currently virtual studio has used the cromakey method in which an image is captured, and the blue portion of that image is replaced by a graphic image or a real image. The replaced image must be changed according to the camera motion. This paper proposes a novel method to extract camera parameters using the recognition of pentagonal patterns which are painted on the blue screen. The corresponding parameters are position, direction and focal length of the camera in the virtual studio. At first, pentagonal patterns are found using invariant features of the pentagon. Then, the projective transformation of two projected images and the camera parameters are calculated using the matched points. Simulation results indicate that camera parameters are more easily calculated compared to the conventional methods.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.185-186
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• 2021

In Korea, many buildings are built with underground spaces and cast-in-place pile method is mostly applied in the temporary retaining walls for the underground space construction. A H-shaped steel section is generally embedded in the soldier pile in the C.I.P method. In this study, a new and economical section with high strength steel replacing the H-shaped section was proposed and its flexural capacity was evaluated experimentally. The new section is the concrete-filled composite section with pentagonal thin plate and thick flange plate. Test results showed that the proposed section has an excellent flexural strength and ductility.

• 대한두개안면성형외과학회지
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• 제21권1호
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• pp.49-52
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• 2020

The specialized structure of the upper eyelid ensures complete closure of the eye and eyeball sealing. An upper eyelid injury can cause various symptoms associated with eyeball trauma, not just scar formation or eyelid deformity. In this report, we describe a case of lagophthalmos observed after wound repair in a patient with a crushing injury caused by a grinder. Several surgical techniques are used to treat lagophthalmos or scar contracture. In most cases, a releasing procedure is performed after 6 months of initial repair. However, if the patient has severe symptoms that are not relieved by conservative care, early revision is inevitable. We describe a case of early lagophthalmos successfully resolved with pentagonal wedge resection, fat redistribution, and full-thickness skin grafting. After the revisional surgery, we observed that the patient regained the ability to completely close the injured eyelid, with restoration of function and favorable cosmetic outcomes. Pentagonal wedge resection to release a retracted structure, fat redistribution to prevent readhesion, and full-thickness skin grafting for enough amount of skin to regain upper eyelid function is useful for scar release and lagophthalmos following crushing injuries of the upper eyelid.