• 대한구순구개열학회지
• /
• 제10권2호
• /
• pp.67-74
• /
• 2007

After Tennison introduced a triangular flap method which, for the first time, preserved the Cupid's bow, Randall gave this method a sound mathematical basis. This method is also called as an inferior triangular cheiloplasty which is characterized by making a small triangular flap from the lateral border of cleft destined to be fitted into an incision on the medial side of cleft. He postulated that the height obtained was equal to the sum of the median of the two triangles used in the cheiloplasty. Using this technique, a 22 month-old male patient with incomplete unilateral cleft lip was corrected primarily. The deviation of the columella and flattening of the nostril on the cleft side were minimal. The operation was done under general anesthesia and patient was healed uneventfully. We tried to improve the symmetry and esthetic feature of philtrum, nostril sill, alar-facial groove, preventing the notch formation on the nostril floor, and to reconstruct the muscle sling in the upper part of lip. The shape of Cupid's bow was restored, and the symmetry of columella was regained as a result. In summary, the inferior triangular cheiloplasty is effective to correct the primary unilateral cleft lip, results in the restoration of favorable anatomy and function.

• 대한조선학회논문집
• /
• 제49권1호
• /
• pp.79-86
• /
• 2012

It is very important to investigate and understand the motion of a FPSO on waves because green water phenomenon occurs owing to the relative motions between incident waves and a ship on them. In this research, both experimental and some numerical approaches have been performed in head sea conditions with regular waves. As an object model of this research, a FPSO model is set free to heave and pitch during the experiments. Also, the motions of the FPSO model which are the results of the experiments are used for the corresponding numerical computations. The purpose of this study is to clarify the effect of bow flare on green water load. In this research, it is found that the amount of green water entered from the side of bow is decreased by the increase of bow flare angle. Moreover, the relation between the green water on the bow upper deck and the impact load on the vertical wall located at turrethead is investigated. The results of this research could be used as one of the fundamental data to design bow flares. Also, an optimized bow flare angle is proposed in this study.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제28권4호
• /
• pp.348-355
• /
• 2006

우리는 3예의 편측성 불완전 구순열 환아에서 Bardach 삼각피판법을 사용하여 구순열을 수복하였다. Millard법에 비해 비주기저부와 비익기저부에 부가적인 절개를 가하지 않으므로 술후 반흔을 줄일 수 있었다. 또한 Tennison-Randall법에 비해 간단하면서도 정교한 계측에 의한 작도가 가능하였다. 한편 삼각피판법의 단점으로 지적되고 있는 인중 부위의 술후 반흔은 3예 모두 불완전 구순열이었기 때문에 삼각피판의 길이가 짧아 심미적으로 허용할 만하였다. Bardach 삼각피판법은 편측성 불완전 구순열의 수복에 추천할 만한 술식임을 경험하였다.

• 대한조선학회논문집
• /
• 제50권5호
• /
• pp.273-281
• /
• 2013

In this paper, the effects of bow deck shape on the green water are studied by numerical and experimental method. Varying the deck shapes to triangular, elliptic and circular, the thickness and advancing velocity of green water leading edge are compared using numerical method. Also the motion, the pressure on the vertical wall and the height on the deck of green water are compared among the three bow deck shapes in the heave and pitch motion free condition by experimental method. To remove the effects of the difference of motions among the deck shapes, numerical simulations are performed varying the deck shape with the same motion. In the same motion condition, smallest impulsive pressure occurred in the condition of elliptic deck shape.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제34권3호
• /
• pp.200-204
• /
• 2012

In the repair of unilateral complete cleft lip, the most popular method is the rotation-advancement by Millard. Despite advantages of Millard repair, a few pitfalls exist. Above all, some of the scars, at the height of the cleft side philtral ridge, cross the Langer's line. Further, in the repair of complete cleft lip, small triangular lateral lip flap is often added in the base of an advancement flap to level the Cupid's bow. Moreover, preservation of the advancement flap has some negative effects on a primary nasal repair. As a result, the shape of philtrum is somewhat unnatural. Therefore, I applied the extended Mohler repair in the six cases of complete wide cleft lip to get a more esthetic scar. As a result, more natural, straight philtral ridge was obtained, without adding small triangular flap in the base of the advancement flap.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• 제33권2호
• /
• pp.154-157
• /
• 2011

The primary purpose of cleft lip surgery should be the aesthetic and functional recovery of the facial components. Triangular flap repair is one of the most common techniques used in cleft lip surgery. In this case report, thirty patients with unilateral cleft lip had been treated using the Tennison-Randall method. The results were favorable and there have been no permanent complications.

• 대한구순구개열학회지
• /
• 제12권2호
• /
• pp.65-72
• /
• 2009

Quadrilateral flap technique for primary cheiloplasty in patients with cleft lip was initially developed by Hagedorn in 1884. After Le Mesurier presented this procedure in 1940's, many surgeons adopted this technique for clinical advantage of reconstruction of Cupid's bow and lesser amount of tissue discarding than straight line technique. However, owing to its drawbacks such as sacrifice of Cupid's bow and prominent scar on philtral ridge, other techniques like Tennison's triangular flap and Millard's rotation-advancement flap have gradually taken its place. Nevertheless, some clinicians like Dr. Wang has modified this quadrilateral flap technique for better clinical outcomes. In this report we present 3 cases of unilateral complete cleft lip patients who underwent primary cheiloplasty with favorable outcomes based on Dr. Wang's modified quadrilateral flap technique.

• Journal of Mechanical Science and Technology
• /
• 제18권12호
• /
• pp.2190-2203
• /
• 2004

A combined procedure for two-dimensional Delaunay mesh generation algorithm and an adaptive remeshing technique with higher-order compressible flow solver is presented. A pseudo-code procedure is described for the adaptive remeshing technique. The flux-difference splitting scheme with a modified multidimensional dissipation for high-speed compressible flow analysis on unstructured meshes is proposed. The scheme eliminates nonphysical flow solutions such as the spurious bump of the carbuncle phenomenon observed from the bow shock of the flow over a blunt body and the oscillation in the odd-even grid perturbation in a straight duct for the Quirk's odd-even decoupling test. The proposed scheme is further extended to achieve higher-order spatial and temporal solution accuracy. The performance of the combined procedure is evaluated on unstructured triangular meshes by solving several steady-state and transient high-speed compressible flow problems.

• 대한조선학회논문집
• /
• 제47권2호
• /
• pp.242-247
• /
• 2010

To consider effects of essential parameters of water impact pressure on dynamic structural responses of bow bottom structures, a parametric study for a ship bottom panel is carried out. The idealized pressure time history models were assumed by triangular and rectangular shapes in time domain. The main loading parameters are duration time and peak pressure value maintaining the same impulse value. The structural models for local bottom stiffened panels of a container ship are analysed. The natural frequency analysis and transient dynamic response analysis are performed using MSC/NASTRAN. Added mass effects of contacting water are considered and the pressure distributions are assumed to be uniform in the whole water contacting surface. The effects of loading parameters on the structural responses, especially maximum displacements, are considered. Besides the peak pressure value, effects of duration time correlated with natural frequencies are thought to be the important parameters.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제10권2호
• /
• pp.141-152
• /
• 2018

The heating process such as line heating, triangular heating and so on is widely used in plate forming of shell plates found in bow and stern area of outer shell in a ship. Local shrinkage during heating process is main physical phenomenon used in plate forming process. As it is well appreciated, the heated plate undergoes the change in material and mechanical properties around heated area due to the harsh thermal process. It is, therefore, important to investigate the changes of physical and mechanical properties due to heating process in order to use them plate the design stage of shell plates. This study is concerned with the development of formula of plastic hardening constitutive equation for steel plate on which line heating is applied. In this study the stress correction formula for the heated plate has been developed based on the numerical simulation of tension test with varying plate thickness and heating speed through the regression analysis of multiple variable case. It has been seen the developed formula shows very good agreement with results of numerical simulation. This paper ends with usefulness of the present formula in examining the structural characteristic of ship's hull.