• Archives of Plastic Surgery
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• v.36 no.1
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• pp.109-112
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• 2009

Purpose: Squamous cell carcinoma(SCC) of the lower lip is the most common malignant tumor comprising 90% of all lip SCC. The typical picture of SCC of the lower lip is of an ulcerated lesion with raised margins. Surgery is the treatment of choice for SCC of lower lip. Depending on the location and size of the tumor, different types of flaps are used. We used new method - 'both buccal mucosa transposition flap' for the reconstruction of the near total mucosal defect of the lower lip. Methods: This 67 - year - old men presented with the crusted $1cm{\times}1cm$ sized ulceration of the lower lip that was arised 30 years ago. There were no size and color change, except the bleeding and ulceration. At first, We diagnosed the SCC through the incisinal biopsy. Then We performed the wide excision of the tumor and reconstruction of the lower lip. After the excision of the whole tumor, the defect was measured at $8cm{\times}3.5cm$. We designed the buccal mucosa transposition flap taking care to avoid the parotid duct. The flap was made in a triangular shape for the reconstruction of defected lower lip. The donor site defect can be sutured primarily. Results: A patient in this study had no postoperative complications such as necrosis, dehiscence, infection of the flap or donor site. Reconstructed lower lip is relatively close to that of the natural lip; More satisfactory aesthetic and functional results can be obtained by using this technique rather than other techniques. Conclusion: 'Both buccal mucosa transposition flap' is reliable method for the reconstruction of the large lower lip mucosal defect. The operation is simple and performed in one stage, with no postoperative complications. This technique can offer consistently good functional and esthetic outcomes after reconstruction of lower lip mucosal defect.

• Archives of Craniofacial Surgery
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• v.13 no.1
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• pp.46-49
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• 2012

Purpose: The forehead flap is the workhorse in nasal reconstruction, which provides a similar skin color, texture, structure, and reliability. There are some disadvantages, including donor site morbidities, 2- or 3-stage operations, and postoperative management after initial flap transfer. Furthermore, there has been little attention to the exposed raw surface wound, after the first stage of an operation. This article describes the authors' modification to overcome this problem, using artificial collagen membrane. Methods: An Artificial collagen membrane is composed of an outer silicone membrane and an inner collagen layer. After a forehead flap elevation, the expected raw surface was covered by an artificial collagen membrane with 5-0 nylon suture. A simple dressing, which had been applied to the site, was changed every 2 or 3 days in an outpatient unit. At 3 weeks postprocedure, a second stage operation was performed. Results: With biosynthetic protection of the raw surface, there were no wound problems, such as infection or flap loss. Thus, the patient was satisfied due to an effortless management of the wound and a reduction in pain. Conclusion: The application of an artificial collagen membrane to the raw under-surface of the flap could be a comfortable and a protective choice for this procedure.

• Journal of Korean Society of Forest Science
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• v.89 no.3
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• pp.335-341
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• 2000

In this study, the multiobjective linear programming (MOLP) formulation was built to solve for the optimal forest management planning considering carbon sequestration and timber production simultaneously. The formulation was applied to a case study problem to investigate the trends of the optimal forest harvest schedules as the function of preference of forest management for carbon sequestration and timber production. The study site was Mt. Kari area in Hongchun. The formulation includes several site-specific constraints for non-declining yields, upper and lower bounds of cut volume and area for timber, ending inventory conditions, etc.. According to the changes of weight combinations for timber production and carbon sequestration, the joint production possibilities curve was proposed as the option for management choice.

• Journal of architectural history
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• v.17 no.5
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• pp.23-37
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• 2008

Hyeunryungwon is a tomb for Crown Prince Sado, who was the father of King Jeongjo, the twenty second king of Joseon dynasty. The tomb had been originally in the Eastern part of Seoul, but was relocated in 1789 to the downtown Suwon, which was renowned as a good tomb site among the Royal family at that time. King Jeongjo looked through the records from the previous generations for the ideal location and direction for the tomb. He personally studied Feng Shui theory and designated its location and direction. He ordered for lavish decorations for the stone adornments of the surroundings of the grave mound, which was against the regulations of the royal family. He found his reasons in the precedent that allowed sumptuous decoration. However, for the arrangements of Jeongjagahk(T shaped building) and other attached facilities, he made unusual choice that other precedent royal tombs did not have. Instead of following the conventions that Jeongjagak should be facing south of a grave mound, he put it on the right side of grave mound. Also conventionally, Subokbang(a place where guards can stay) and Suragan(a kitchen that prepares food for sacrificial rites) should be facing symmetrically, but they too, were on the same side with Jeongjagak. It was a measurement that the grave mound of Hyeunryungwon can have a full view without being obstructed by other facilities and it was also personally ordered by King Jeongjo. The distinguishing features of Hyeunryuwon was motivated by King Jeongjo's filial affection, and his academic pursuit of precedent royal tombs initiated the unconventional and innovative challenges.

• Archives of Craniofacial Surgery
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• v.20 no.1
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• pp.37-43
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• 2019

Background: Tongue reconstruction is challenging with the unique function and anatomy. Goals for reconstruction differ depending on the extent of reconstruction. Thin and pliable flaps are useful for tongue tip reconstruction, for appearance and mobility. This study reports lateral arm free flap (LAFF) as a safe and optimal option for hemi-tongue reconstruction, especially for tongue tip after hemiglossectomy. Methods: Thirteen LAFFs were performed for hemi-tongue reconstruction after hemiglossectomy from 1995 to 2018. Of the 13 patients, seven were male and six were female, age varying from 24 to 64 years. Results: All flaps healed uneventfully without complications. Donor sites were closed primarily. The recipient vessels for microvascular anastomosis were mainly superior thyroidal artery, external jugular vein. All patients returned to normal diet, with no complaints regarding reconstructed tongue and donor site. Conclusion: The LAFF is hairless, thin (especially with lateral epicondyle approach), and potentially sensate. They are advantageous features for tongue tip and hemi-tongue reconstruction. Donor site sacrifices the inessential posterior radial collateral artery, and the scar is hidden under short sleeve shirts. We believe that LAFF can be considered as the first choice flap for hemitongue reconstruction, over radial forearm free flaps.

• Journal of Korean Academy of Dental Administration
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• v.6 no.1
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• pp.43-47
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• 2018

Online data can be explored for topics browsed by an unspecified population to detect professional information demands more quickly. The purpose of this study was to collect and analyze online questionnaires in order to find information required by dental hygienists. We analyzed the frequency of posting words after isolating nouns from questions of the Korean Dental Hygienists Association homepage's Q & A section, the Naver Knowledge-iN service, and a dental hygienists' online meeting site in Naver. We found that queries of the Korean Dental Hygienists Association's homepage were concentrated on education renewal and license notification. The queries about dental hygienists in the Naver Knowledge-iN service used words related to job or career choice, and the queries of the dental hygienist-affiliated site had many words related to dental practice, dental work, and turnover. This study showed that the information needs of unspecified dental hygienists varied depending on the online environment such as homepage, blog, and information service.

• Archives of Plastic Surgery
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• v.50 no.6
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• pp.586-592
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• 2023

Background One-stage reconstruction with "thin perforator flaps" has been attempted to salvage limbs and restore function. The deep inferior epigastric perforator (DIEP) flap is a commonly utilized flap in breast reconstruction (BR). The purpose of this study is to present the versatility of DIEP flaps for the reconstruction of large defects of the extremities. Methods Patients with large tissue defects on extremities who were treated with thin DIEP flaps from January 2016 to January 2018 were included. They were minimally followed up for 36 months. We analyzed the etiology and location of the soft tissue defect, flap design, anastomosis type, outcome, and complications. We also considered the technical differences in the DIEP flap between breast and extremity reconstruction. Results Overall, six free DIEP flaps were included in the study. The flap size ranged from 15 × 12 to 30 × 16 cm². All flaps were transversely designed similar to a traditional BR design. Three flaps were elevated with two perforators. Primary closure of the donor site was possible in all cases. Five flaps survived with no complications. However, partial necrosis occurred in one flap. Conclusion A DIEP flap is not the first choice for soft tissue defects, but it should be considered for one-stage reconstruction of large defects when the circulation zone of the DIEP flap is considered. In addition, this flap has many advantages over other flaps such as provision of the largest skin paddle, low donor site morbidity with a concealed scar, versatile supercharging technique, and a long pedicle.

• Journal of the Korea Institute of Building Construction
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• v.5 no.1 s.15
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• pp.53-61
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• 2005

The purpose of this study presents useful data on the choice or development of floor covering from slip viewpoint by examining closely the impact of the changes in sliding experiments due to the wear of floor covering by walk. The result of wear practical test per ten thousand walks enforces some kind of popular floor covering and measure of coefficient of slip resistance as follows: (1) When surface of floor covering is in the state of wet, the degree of wear doesn't affect greatly in slip. (2) When surface of floor covering is in dry and clean state, most floor coverings have the tendency to lower the coefficient of slip resistance with the amount of walk on it. (3) Change in the tendency of slip resistance by wear appeared mainly due to the differences in the state of floor covering and organic floor covering appeared to have great reduction of coefficient of slip resistance than the inorganic ones. (4) According to the result of investigation on changes in tendency of coefficient of slip resistance due to the increase in the number of walk and if two hundred thousand walks were done, regardless of surface shape or kind of site, etc, the safety of floor covering, in slip viewpoint, greatly reduces.

• Journal of Astronomy and Space Sciences
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• v.27 no.1
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• pp.21-30
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• 2010

In processing space geodetic data, mapping functions are used to convert the tropospheric signal delay along the zenith direction to the line of sight direction. In this study, we compared three mapping functions by evaluating their effects on the tropospheric signal delay and position estimates in GPS data processing. The three mapping functions tested are Niell Mapping Function (NMF), Vienna Mapping Function 1 (VMF1), and Global Mapping Function (GMF). The tropospheric delay and height estimates from VMF1 and GMF are compared with the ones obtained with NMF. The differences among mapping functions show annual signals with the maximum occurring in February or August. To quantitatively estimate the discrepancies among mapping functions, we calculated the maximum difference and the amplitude using a curve fitting technique. Both the maximum difference and amplitude have high correlations with the latitude of the site. Also, the smallest difference was found around $30^{\circ}N$ and the amplitudes increase toward higher latitudes. In the height estimates, the choice of mapping function did not significantly affect the vertical velocity estimate, and the precision of height estimates was improved at most of the sites when VMF1 or GMF was used instead of NMF.

• Journal of The Korean Dental Society of Anesthesiology
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• v.5 no.2 s.9
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• pp.107-111
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• 2005

Background: Nasotracheal intubation for general anesthesia is preferred for many oral and maxillofacial procedures because it ensures unhindered access to the operative site. Epistaxis and tube insertion failures are recognized complications of nasotracheal intubation. The aim of our study was to elucidate whether the nostril side used influenced epistaxis and insertion failure incidence. Methods: We studied 434 patients undergoing nasal intubation (July 2004- February 2005) with permission. Randomly, one side of nostril was selected with chart ID number. During nasotracheal intubation, epistaxis severity and tube insertion failure was observed by the anesthesiologist who inserted nasotracheal tube. Results: There was no significant difference between either nostril in epistaxis severity (chi-square test P = 0.860) and in the incidence of insertion failure (P = 0.867). Conclusions: In this study, both nostrils showed equal epistaxis and insertion failure incidence.