• Archives of Plastic Surgery
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• 제40권4호
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• pp.353-358
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• 2013

Background Robots have allowed head and neck surgeons to extirpate oropharyngeal tumors safely without the need for lip-split incision or mandibulotomy. Using robots in oropharyngeal reconstruction is new but essential for oropharyngeal defects that result from robotic tumor excision. We report our experience with robotic free-flap reconstruction of head and neck defects to exemplify the necessity for robotic reconstruction. Methods We investigated head and neck cancer patients who underwent ablation surgery and free-flap reconstruction by robot. Between July 1, 2011 and March 31, 2012, 5 cases were performed and patient demographics, location of tumor, pathologic stage, reconstruction methods, flap size, recipient vessel, necessary pedicle length, and operation time were investigated. Results Among five free-flap reconstructions, four were radial forearm free flaps and one was an anterolateral thigh free-flap. Four flaps used the superior thyroid artery and one flap used a facial artery as the recipient vessel. The average pedicle length was 8.8 cm. Flap insetting and microanastomosis were achieved using a specially manufactured robotic instrument. The total operation time was 1,041.0 minutes (range, 814 to 1,132 minutes), and complications including flap necrosis, hematoma, and wound dehiscence did not occur. Conclusions This study demonstrates the clinically applicable use of robots in oropharyngeal reconstruction, especially using a free flap. A robot can assist the operator in insetting the flap at a deep portion of the oropharynx without the need to perform a traditional mandibulotomy. Robot-assisted reconstruction may substitute for existing surgical methods and is accepted as the most up-to-date method.

• 대한두경부종양학회지
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• 제18권1호
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• pp.18-22
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• 2002

Background and Objectives: The expression of telomerase, a ribonucleoprotein complex, has been detected in tissues from many human cancers, but not in the majority of normal tissues except germ cell. It is believed that the activation of telomerase is linked to celluar immortality and may playa role in tumorigenesis. Human telomerase reverse transcriptase (hTERT) has been identified as a putative catalytic subunit of human telomerase and its expression is closely correlated with telomease activity. We studied the expression of hTERT in head and neck squamous cell carcinoma (HNSCC) and resection margin by immunohistochemistry for hTERT and evaluate the correlation between hTERT expression and clinical data in HNSCC. Materials and Methods: We performed a immunohistochemistry in 17 cases of HNSCC and 10 cases of resection margins, histologically normal. The correlations between the hTERT expression and the clinical data in HNSCC were analyzed. Result: hTERT immunoreactivities were detected in 14 of 17 (82.4%) HNSCC, 1 of 10 (10%) resection margin. No correlation was observed between clinical data and hTERT expression in HNSCC. Conclusion: hTERT is activated in HNSCC and its expression is independent from clinical data of patients.

• 대한치과교정학회지
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• 제15권2호
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• pp.211-227
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• 1985

The purpose of this study was to analyze the stress distribution and the displacement in the maxillary complex after the application of the three kinds of the head gear. (high pull head gear, straight pull head gear, cervical pull head gear.) Orthopedic force, 300 gram, was applied to the maxilla of the dry human skull in a high, straight and cervical direction. The stress distribution and the displacement within the maxillary complex was analyzed by a 3-dimensional finite element method. The results were as follow: 1. In won, the stress of conical pull head gear was the greatest stress and straight pull head gear was the medium stress and high pull head gear was the least stress. 2. The compressive stress was observed on the anterior portion of premaxilla, especially anterior nasal spine area, when the three kinds of head gear were applied to the dry kuman skull. 3. It appeared that the stress of the anterior portion of the zygomatic bone was greater than the posterior portion in the case of three kinds of head gear application and compressive stress was noted only at the below of the frontozygomatic suture of the zygomatic bone. 4. The backward, upward, sideward displacement of the alveolar area was observed in a high pull head gear application but in the case of straight pull head gear and cervical pull head gear application, the backward, downward, sideward displacement was observed. 5. The forward, downward, sideward displacement was observed on the midpalatine suture and premaxilla on the sagittal plane and transverse palatine suture in the case of three kinds of headgear application.

• 한국의류학회지
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• 제42권6호
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• pp.988-1001
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• 2018

The head and face are the most complicated structures of the human body. However, unlike apparel products, many of the head and face related products are produced in unisex or one-size-fits-all. Therefore, it is necessary to provide a practical analysis that reflects these size structures. This study analyzed head and face measurements of men, women, and both men and women; its purpose lying in clarifying the differences and commonalities between the measurements of men and women and discovering the possibility of integrating analysis on measurements of men and women. 3D face and head measurement data of men and women from 20 to 29 years-old from Size Korea's 6th human body size data were analyzed for this study. The mutual 9 factors were extracted as the results of the three factor analyses (both men and women) separately and men and women integrated. However in the cluster analysis based on the 9 factors, men and women showed mutual characteristics and different landscape in group types and distribution. The commonalities and differences between men and women observed in this study should be applied to the sizes of head and face products.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.1504-1508
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• 2003

The functional behavior of each body segments were investigated with respect to human standing posture when they were exposed to the horizontal vibration in the sagittal plane. This study is processed by experimental approach. The data is analyzed, both in the time domain and in the frequency domain. Random and multisinusoidal vibration was used as input. The ankle, hip, and head were employed as the significant body segments. High relative movements were present between hip and head, and there was no significant relationship between ankle and head. Variations of visual input produced a significant postural effect.

• 한국정보통신학회논문지
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• 제5권6호
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• pp.1151-1156
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• 2001

본 논문에서 이동통신 전화기에 의해 인체두부에 유기된 전계 분포와 지향성을 분석하였다. 계산된 모델은 인체 두부모델을 구성하고 안테나는 휴대폰 크기와 같은 그라운드판위에 올려놓았다. 이동 통신 전화기의 안테나로 전기력선이 제한 받지 않는 용량을 장하한 QMSA를 활용하였다. 안테나는 2㎓ 부분의 주파수 대역에서 동작하도록 설계하였고, 인체 두부로 터의 거리에 따른 변화와 안테나 복사 특성을 고찰하였다.

• 한국산업정보학회논문지
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• 제19권5호
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• pp.9-14
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• 2014

최근 컴퓨터 비젼이나 게임과 같은 분야에서 사람의 모션을 이용한 다양한 콘텐츠들이 개발되고 있다. 모션을 이용하여 콘텐츠를 제작하거나 응용프로그램을 개발하게 되면, 사용자는 게임이나 콘텐츠에 더욱 몰입감을 느낄 수 있고, 그에 따른 콘텐츠 사용의 만족도가 향상된다. 본 논문에서는 웹 카메라를 이용해서 캡처한 영상으로부터 모션을 인식하고, 이를 별도의 장비 없이 게임의 인터페이스로 활용할 수 있는 방법을 개발한다. 제안된 방법은 MHI(Motion History Image)와 피부색 검출 결과를 결합하여 입력영상으로부터 사람의 머리 부분을 분할하고, MHI 시퀀스(Sequence)를 이용하여 방향과 이동거리를 계산한다. 실험결과에서 제안된 사람의 머리 모션 인식 결과를 실제 게임에 적용하여 게임 캐릭터를 제어하기 위해 사용하였다. 제안된 방법은 사용자의 몰입감 정도를 향상시킬 수 있음을 증명하였고, 그로인해 기능성 게임의 사용자 인터페이스로의 가능성을 확인하였다.

• 한국산업융합학회 논문집
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• 제5권4호
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• pp.321-327
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• 2002

There has been an increase in the public concern about possible health risks by electromagnetic exposure from mobile phones. Recently, increase in the use among young children of portable telephones public concern regarding potential health hazards due to a hot spot appearing inside the infant head, has been growing. Since the biological hazards due to RF exposure are caused mainly by a temperature-rise in tissue, the effect of localized SAR for portable telephones should also be related to the temperature-rise in the human head. In this paper, it was measured that in the actual use of portable telephone the temperature of the local tissue in the human-head change. As a result, it should be noted that the mean temperature of human-body and localized tissue is rising from beginning call. However the temperature variation of localized tissue is recovered rapidly as normal temperature, although the mean temperature of human-body rising continuously at ending call of portable telephone.

• 대한음성언어의학회:학술대회논문집
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• 대한음성언어학회 2015년도 제42차 춘계학술대회
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• pp.17-17
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• 2015

• 한국생활과학회지
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• 제15권4호
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• pp.623-630
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• 2006

The purpose of this study is to do research hairdressers' knowledge of hairless head dummy's brand name, and to suggest and develop various hairless head dummy for the students who are learning hair styling in the colleges and the academies, for the hairdressers working in the beauty salons. Using only one and same kind of hairless head model is not appropriate for hairdressers and students being trained hair styling skill, because people have a variety of head shapes. Three hundred twenty nine persons who live in Iksan area are selected as subjects. The results of the study are as follow: by the analysis of subjects' knowledge of hairless head dummy's brand name, most of them didn't know it exactly. This study deduced that there is a significant relation between the utility of hairless head dummy and subjects' intention of purchasing the dummy. To put it in detail, in case of college students, there is little significant difference between them. But in case of academy students, there is. By the regression analysis, especially, in case of hairdressers working in beauty salons and academy students, four conditions did significantly matter in their purchasing the dummy: first, whether the respondents owns it, second, whether it is helpful to themselves, third, whether they have ever used foreign products and, finally, whether they have intention to purchase various hairless head dummys or not. In conclusion, it depended on each group position whether their knowledge of brand names of hairless head model affects their purchase of the dummy or not.