유방재건술의 변천과정에 대한 고찰

하지운 한림대학교의료원 1983 人間科學 Vol.7 No.12

블로그 공간의 내부 구조 분석

하지운 ( Jiwoon Ha ),배덕호 ( Duck-ho Bae ),김상욱 ( Sang-wook Kim ),백석철 ( Seok-chul Baek ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.1

최근, 블로그 이용자의 수가 크게 증가함에 따라 블로그 공간에 대한 분석의 중요성이 점차 증가하고 있다. 본 논문에서는 블로그 공간의 보우타이 구조 분석을 통해 블로그 공간의 내부 구조의 특성을 파악한다. 더 나아가, 웹 공간과의 비교를 통해 블로그 공간만의 고유의 특성을 도출한다.

블로그 연결망의 특성 분석

하지운(Jiwoon Ha),배덕호(Duck-Ho Bae),김상욱(Sang-Wook Kim) 한국정보과학회 2009 한국정보과학회 학술발표논문집 Vol.36 No.1

최근 블로그를 이용하는 사용자들이 증가하면서 블로그 공간을 대상으로 한 다양한 연구가 진행되고 있다. 본 논문에서는 블로그 공간에서 블로거들 간의 관계를 바탕으로 블로그 연결망을 구성하는 방법에 대해 논의한다. 또한, 구성된 블로그 연결망의 특성을 분석하기 위해 다양한 실험을 수행한다. 더 나아가, 블로그 연결망과 웹 연결망의 비교를 통해 두 연결망의 특성의 차이를 보이고, 이러한 차이가 나타나는 원인을 규명한다.

시간의 흐름에 따른 한국 블로그 공간의 변화 분석

하지운 ( Jiwoon Ha ),배덕호 ( Duck-ho Bae ),김상욱 ( Sang-wook Kim ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1

블로그 공간은 블로거들의 이동 및 블로거들의 행동에 의해 시간에 따라 지속적으로 변화한다. 이러한 블로그 공간의 변화를 분석함으로써 블로그 공간이 발전해 온 경향을 알 수 있으며, 나아가 향후 발전 과정을 예측할 수 있다. 본 논문에서는 한국 블로그 공간의 구조적 특성이 시간의 흐름에 따라 변화하는 모습을 심도 있게 분석한다.

Tissue Expansion을 이용한 연부조직 재건

하지운 大韓成形外科學會 1986 Archives of Plastic Surgery Vol.13 No.3

Tissue expansion is an alternative in reconstruction by providing donor tissue of the same color, texture, similar thickness, sensation with minimal scar formation and minor donor site morbidity. Adjacent flap development by tissue expansion is the mechanical enlargement of the donor tissue by internal pressure induced through the expander, which is intermittenly and forcefully injected with normal saline. The modern ear of soft tissue expansion began following the pioneering efforts of Dr. Chedomir Radovan. His work was first present in 1976. Recently. It is widely and successfully used in various soft tissue defect or deformities. I successfully applied the tissue expander in 6 patients. The first case was a 25 year old woman, who had multiple depressed scars in left lower extremity. The second case was a 30 year old man who had suffered from neck scar contracture following flame burn. The third case was a 13 year old boy with extensive depressive scars on both thing following degloving injury. The fouth case was a 25 year old womal, who had a burn scar on chin and neck. In the fifth case, 20 year old woman with Pland's syndrom, who had unilateral breast agenesis with absence of pectoralis muscle, was reconstructed with transfer of latissums dorsi muscle flap and permannent breast implant insertion after temporary chest skin expansion. The sixth case was a 14 year old girl, who had a wide anterior tibial scar contracture. All cases were successfully reconstructed without complications.

효과적인 협업 필터링을 위한 데이터 임퓨테이션 방법

하지운(Jiwoon Ha),김형욱(Hyoung-ook Kim),김상욱(Sang-Wook Kim) 한국정보과학회 2016 정보과학회지 Vol.34 No.6

筋 轉移에 依한 顔面神經痲痺의 治驗

河芝耘,姜振聲,李永吉 大韓成形外科學會 1979 Archives of Plastic Surgery Vol.6 No.2

Facial expression and musculature is complicated and one of nature's most delicate functions. Deformities secondary to facial paralysis such as sagging of the face, ectropion, epiphora and drooling, can be distressing to the person afflicted with facial nerve paralysis. Permanent paralysis of the 7th cranial nerve results in one of the most severe cosmetic or functional deformities of the face, and its correction, which never is perfect is a major challenge for the plastic surgeon. The reconstructive aim in facial nerve paralysis is to restore first the normal appearance of the face at rest, then symmetry with voluntary motion, controlled ballance in expressing emotion, restoration of oral, nasal, and ocular sphincter control, and to prevent loss of other significant functions. The reconstructive techniques required to correct facial paralysis are fascial suspensision, masseter and temporalis muscletransfer with carrying insertions, control of spastic antagonistic muscles by neurotomy or selective myom-ectomy, a unilateral uplifting rhytidoplasty with formation of a nasolabial fold, correction of the palpebral deformities by simple canthoplasty or lateral tarsorrhaphy, nerve anastomosis, nerve rerouting, nerve grafting and muscle transplantation with microneurovascular anastomosis, etc. The choice of procedures was never dependent on the prejudice of the operator but on a detailed analysis of the etiology, degree, status prognosis, and rate of progression of deformity, as well as on the usual evaluation of the patient's age, sex and general health. We treated two permanent facial paralysis patients with combined static fascia lata suspension and dynamic muscle transposition, by using portions of the masseter and temporalis muscle to support and reactivate the eyelid and mouth. By this combined use of divergent muscle action, the facial animation more closely simulates normal facial movement. Postoperatively, electromyographic tracings showed action potentials in transferred muscles.

攝食 및 絶食狀態가 放射性醋酸의 脂肪組織에의 編入에 미치는 影響

河芝耘,曺俊承,郭春植 啓明大學校 醫科大學 1983 계명의대학술지 Vol.2 No.1

放射性醋酸의 脂肪組織의 脂質에의 編入에 대하여 攝食 또는 絶食狀態에 따라 어떻게 變動하는가를 調査하여 다음과 같은 結果를 얻었다. 放射性醋酸의 脂質에의 編入樣相은 腸間膜脂肪組職에서나 副睾丸脂肪造直에서 同一하였다. 脂肪組織의 脂質에의 放射性醋散의 編入速度는 攝食 또는 絶食狀態에 相關없이 注入 후 3時間째에 最高値에 達하였다. 絶食狀態에서의 放射性醋酸의 脂肪組織에의 編入速度는 正常 攝食狀態에서의 그것에 比하여 約 4分의 1에 해당되는 적은 量이었다. 以上의 結果는 脂質合成 速度는 脂肪組織의 所在에 關係없이 同一하며 饑餓狀態에서는 脂肪合成이 顯著하게 減少됨을 示唆한다고 하겠다. To examine the effect of starvation on the incorporation of acetate-1-???C into adipose tissue, male rats weighing approximately 250 gm were divided into two groups; the control group was fed commercial diet ad libitum and the starved group was fasted for 24 hours before the adminis-tration of acetate-1???C. A single dose of 4 μCi of acetate-1-???C per 100 gm body weight was injected abdominally in both fed and fasted rats. To determine the rate of incorporation of acetate-1-???C into lipid, rats were killed at 1.5, 3.0 and 4.5 hours after the injection, and the radioactivity of labeled lipid was counted with gas flow counter. The incorporation of acetate-1-???C into lipid was the same rate in both mesenteric and the epididy-mal adipose tissue. The rate of acetate-1-???C incorporation into adipose tissue was reached to the peak at three hours after the injection of the acetate regardless of feeding or fasting state. The peak of the acetate incorporation into adipose tissue of starved rate was only one fourth compared with that of normal fed group. The above reaults indicate that lipogenesis in the adipose tissue is remarkablly inhibited by the starvation.

血管腫의 非觀血的 治療經驗

河芝耘,姜振聲 대한성형외과학회 1981 Archives of Plastic Surgery Vol.8 No.1

The hemangiomas are the most prevalent benign tumors of infancy and early childhood. Although they occur throughout the body, the most frequent site is the head and neck area. Hemangiomas are composed of not only arterial, capillary, cavernous, and venous elements but also adipose tissue, fibrous tissue, lymphoid follicles and calcification. They do not represent proliferations of one cellular element. In this sense, most hemangiomas are hamartomas rather than true neoplasm. The strawberry hemangioma is mostly composed of capillaries that have embryonal endothelium, 49-95% of which spontaneously involute within the first 7 years of life. The cavernous hemangioma involves a more mature endothelial cell organization and there is a 60 to 70 % chance of regression of all these lesions by the age of 8 years but the lesion of the lips seems to resolve less satisfactorily due to abundant blood supply and portwine hemangioma, which is composed of capillaries with adult endothelium and persists with little change during the person's lifetime. Today, hemangiomas have been treated by various means : the conservative method ; conscientious observation, local or systemic steroids, use of cosmetics, cryotherapy, compression, X-ray irradiation, use of cosmetics, and laser photo-coagulation, and also the surgical method ; dermabrasion, surgical tattooing, ligation or embolization of feeding arteries, and surgical excision. The response of treatment varies with the type of hemangioma, region of the hemangioma, and the age of patient, and no completely satisfactory method of treatment has yet been established. During the past 6 years and 3 months, from May, 1974 to August, 1980, a total of 309 patients visited our clinic and we have treated 95 patients with hemangiomas with systemic prednisolone, sclerosing agent, Dry Ice, and X-ray irradiation. The results were summarized as follows : 1) Females were affected about 2 times more than males and the most frequent site was the face (83%), among which the lip was the predominent site. 2) the most frequently involved age group was under 2 years, the next being 10-20 years of age, 20-30 years, of age, the pre-and post-school age groups respectively. 3) The number of clinical types of treated hemangiomas revealed 28 strawberry, 21 portwine stain, 41 cavernous and 5 mixed hemangiomas. 4) Systemic prednisolone was administered to 54 patients from age 1 month to 2 years for at least 2 weeks, and 25 patients were followed up. Among these patients, one patient's strawberry hemangioma was completely regressed, 5 patient's strawberry hemangiomas were partially regressed, 7 patient's cavernous hemangiomas were partially regressed, but there was no effect on mixed hemangiomas. 5) Sotradecol as a sclerosing agent was injected into 21 patients to the age of 7 to 32 years 1 to 4 times in intervals of 2 weeks. The most frequent injection site was the lower lip and 14 patients were followed up. Among these patients, 1 patient's cavernous hemangioma on the lower lip had completely disappeared, 9 patient's hemangiomas had partially regressed and 4 patient's had no effect. 6) Dry Ice was applied on 16 patients with facial portwine stain hemangiomas to the age of 16 to 24 years, 1 to 5 times at intervals of 2-3weeks. among these patients, 7 patients were followed up. Four patients had improved, 2 patients had no change, I patient became worse. 7) Radiation was given to 4 patients. 1 patient with a cavernous hemangioma on the upper lip had radium needle insertion and improved, and 2 patients with cavernous and portwine stain hemangiomas involving the lower extremities had some improvement.

선천성 EARLOBE 기형의 치험례

하지운,공봉택,박규남,서인석 大韓成形外科學會 1992 Archives of Plastic Surgery Vol.19 No.2

The earlobe cleft may be divided into congenital and traumatic types. The congenital earlobe cleft is rare and less common than the traumatic cleft. Congenital earlobe cleft shows various shapes and that can be classified according to the location and shapes. Yamada classified the cleft according to the location, anterior, posteior and double lobe type. On the contrary, Kitayama classified the cleft according to the shapes, longitudinal, transverse, triple and defective type. The methods of repair are selected depending on the types and shapes, and the important thing is to make a round lobar shape without decreasing the amount of tissue by geometric operative clesign. We have experienced 9 cases of congenital earlobe clefts which had various shapes, 3 longitudinal types, 2 transverse types, 2 double lobe types and 2 defective types. We used Z-plasites for the correction of most of the double lobes, longitudinal and transverse type, square flap for longitudinal, anterior type which have shortage of earlobe tissue, and the two flaps for defective type earlobe, and simple closure in selective case. The result was good and satisfactory without complications.