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박진권(Jin Gwon Park),박종헌(Jong Hun Park),강찬우(Chan Woo Kang),진준기(Jun Ki Jin),김동완(Dong Wan Kim),이태경(Tae Kyung Lee),이종운(Jong Woon Lee) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
기존 열차제어 시스템은 궤도회로와 RFID, 트랜스폰더 등을 통하여 열차의 위치를 검지하고 있다. 그러나 센서 자체의 위치검지 정밀도가 낮아 열차위치 검지 오차가 커서 정밀한 위치제어에 제약이 있다. 본 논문에서는 RF 비콘과 레이저 센서, 높은 분해능의 타코미터 센서 융합을 통하여 열차의 절대위치를 cm 단위로 정밀하게 검지할 수 있는 열차 위치검지센서시스템을 제안하였다. 제안된 위치검지 센서는 RF 비콘에서 송신하는 ID 를 수신하여 구간을 인지하고, 레이저 센서를 이용하여 절대위치 기준점을 정밀하게 검지한다. 차축회전각도에 비례하여 발생하는 타코미터 펄스 수를 계수함으로써 절대위치 기준점으로부터 이동한 거리를 계산하여 열차의 위치를 계산한다. 본 센서를 이용할 경우보다 정밀한 열차 위치제어가 가능하며, 이를 통해 열차의 이용편리성과 운영효율을 높일 수 있다. Current train control system detects the train location using Track circuit, RFID, or Transfonder. However, the sensor precision is too low and it limits the precise train position control. In this paper, a train location sensor fusion system, consisting of the RF beacon, laser sensor, and high resolution tachometer with cm level accuracy, is proposed. The proposed system recognizes the section by RFID from RF beacon and senses the absolute reference position by laser sensor. By counting the tachometer pulses which are proportional to the axle rotation angle, the relative distance from the reference location is calculated. With the proposed sensor system, it is possible to control the train location more precisely and it will help to make train operation system more effective and efficient.
갑판침수를 고려한 화학제품운반선 건현 검토에 관한 연구
박종헌(Jong-Heon Park) 한국해양공학회 2010 韓國海洋工學會誌 Vol.24 No.2
This paper deals with the problem of developing a new decision procedure for the freeboard of a coastal chemical tanker going on the coast. The decision procedure is mainly constructed with the algorithm of estimating statistically the time period that deck wetness will last on the deck of the ship. Deck wetness is one of the most important safety factors for sailing of a coaster. It generally means the situation in which the amplitude of the relative motion between the deck and the surface of the wave exceeds the freeboard. Therefore, in this paper, we proposed that the time during which the amplitude remains above the level of the freeboard should be appraised on the basis of statistical theory. A series of numerical calculations u£re executed for four different coastal chemical tankers (199G/T Type Ⅱ, Ⅲ & 4990G/T Type Ⅱ, Ⅲ). It was demonstrated that the present decision procedure of freeboard is practical for planning the type of coaster sailing in the sea.
액취증 환자에서 레이저 치료와 수술적 치료의 임상적 효과 및 환자 만족도에 대한 후향적 연구
박종헌 ( Jong Heon Park ),조주영 ( Juyoung Jo ),김일환 ( Il-hwan Kim ) 대한피부과학회 2023 대한피부과학회지 Vol.61 No.4
Background: Axillary bromhidrosis is a disease characterized by malodor caused by the interaction between apocrine gland secretions and bacteria. Current treatment modalities include topical treatment, liposuction curettage, microwave therapy, and surgical intervention. Objective: This retrospective study aimed to evaluate the clinical outcomes and quality of life over a 3-year follow-up period of the 1,444-nm Nd:YAG laser and surgical treatment for bromhidrosis. Methods: Forty-five patients participated in the study, with 20 patients receiving laser treatment and 25 patients undergoing surgery using the modified Inaba method. The degree of remaining axillary malodor, pain, reduced mobility, and overall patient satisfaction were assessed retrospectively through medical records and direct or indirect patient interviews at 7 days, 1 month, 2 months, 6 months, 1 year, and 3 years after each treatment. The modified Dermatology Life Quality Index (DLQI) was used to evaluate the quality of life. Results: Over the course of all the assessed time periods, the remaining odor and overall satisfaction scores did not differ significantly between the two groups. However, the laser-treated group reported significantly lower pain scores, reduced mobility, and total DLQI score. There were no significant differences in adverse events between the two groups. Conclusion: In our study, laser treatment for bromhidrosis showed comparable efficacy to surgery. Moreover, fewer adverse events occurred in the laser group. In addition, patient quality of life was better after laser treatment. In conclusion, subdermal coagulation treatment with the 1,444-nm Nd:YAG laser may be a less invasive and effective therapy for bromhidrosis. (Korean J Dermatol 2023;61(4):209∼216)
세일링요트 개발을 위한 20세기초 전통 어선의 선형연구
박종헌(JONG-HEON PARK),박근옹(GEN-ONG PARK),김동준(DONG-JOON KIM) 한국해양공학회 2004 韓國海洋工學會誌 Vol.18 No.4
A Study of the traditional Korean fishing boat is based on a report on an investigation of the Korean fishing boats, conducted in 1921. The report was completed in 1927 with the conclusion of the Southern Sea region and West Sea region studies, which included the investigation of the entire region. It was a very thorough and scientific investigation of Korean fishing boats, which has been published in three volumes. Based on this report, this paper surveys the characteristics and the hull form of the traditional Korean fishing boats. As a result, we find out that the hull form of the traditional Korean fishing boat is very similar to that of modern sailing boat. Thus, it is a good candidate for the development of the modern sailing boats for the Korean Sea.
박종헌 ( Jong Heon Park ),조주영 ( Ju Young Jo ),박현우 ( Hyunwoo Park ),김효윤 ( Hyo Yoon Kim ),김일환 ( Il-hwan Kim ) 대한피부과학회 2024 대한피부과학회지 Vol.62 No.1
Nevus unius lateris (NUL) is a variant of an epidermal nevus that involves a widespread body surface, especially half of the body, and its onset usually occurs at birth or early life. An increased risk of basal cell carcinoma (BCC) in epidermal nevus has also been reported. However, the exact incidence remains unknown. A 67-year-old female patient visited our dermatology clinic with black nodules protruding over multiple verrucous brownish patches and plaques on the right side of the trunk. The patient had congenital NUL. Black nodules were observed to develop several months previously and gradually enlarged. The skin biopsy of one black nodule was consistent with BCC. Subsequently, Mohs micrographic surgery was performed for the BCC. To date, there have been few reports of BCC arising within the nevus unius lateri. Herein, we report a rare case of BCC considered to originate from a congenital NUL. (Korean J Dermatol 2024;62(1):50∼52)