http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박준욱,이성학,이희춘 대한금속재료학회(대한금속학회) 1998 대한금속·재료학회지 Vol.36 No.5
A study was made of the effects of alloying elements on microstructural factors and wear properties of four high speed steel (HSS) rolls manufactured by centrifugal casting method. A simulation test was carried out using a high-temperature wear tester capable of controlling speed, load, and temperature. The test results revealed that the HSS roll containing a larger amount of vanadium showed the best wear resistance because it contained a number of hard MC carbides. However, it showed a very rough roll surface because of the cracking along cell boundaries, the preferential removal of the matrix, and the sticking of the rolled material to the roll during the wear process, thereby leading to increase in friction coefficient and rolling force. In order to improve wear resistance with consideration of the roll surface roughness, it is suggested that reduction in the vanadium content, solid solution hardening by adding alloying elements, secondary hardening by precipitation of fine carbides in the matrix, and formation of fine prior austenite grain boundaries by pre-austenitization treatment are required to strengthen the matrix which can hold hard carbides in it.
박준욱,선동일,조광재,조영훈,유화종,김민식 대한이비인후과학회 2010 Clinical and Experimental Otorhinolaryngology Vol.3 No.3
Objectives. The reported incidence of tongue cancer in young patients has recently increased. The aim of this study was to analyze the clinical characteristics of tongue cancer in a young group of patients, and to compare them with those of an older group of tongue cancer patients. Methods. We retrospectively reviewed the records of 85 patients who were diagnosed with squamous cell carcinoma of the tongue. They were divided into two age groups: over 45 years of age and under 45 years. To compare the prognosis of similarly staged patients in the group, each age group was divided into the early (stage I, II) and advanced stage groups (stage III, IV), and then they were compared. The young group consisted of 23 patients and the older group had 62 patients. Results. At the early stage, the clinical prognosis of the patients in both age groups was good, and no significant difference was observed. However, at the advanced stage, the overall and regional recurrence rates were significantly higher in the younger age group as compared to that in the old age group (P=0.007, P=0.001, respectively). The diseasespecific survival rate of the patients in the young group was significantly lower than that in the old age group (P=0.025). Conclusion. Tongue cancer in young subjects has significantly different clinical outcomes according to the stage. The clinical outcome of the advanced-stage tongue cancer in young subjects was poorer than that in the older subjects. Regional recurrence seemed to be the main cause of the poor prognosis.
갑상샘 수술치료의 새로운 개념: 구강내시경수술 및 로봇수술
박준욱 대한의사협회 2021 대한의사협회지 Vol.64 No.3
The increased incidence of thyroid cancer in young females may raise concerns about visible hypertrophic scarring on the center of the neck after thyroid gland surgery. Therefore, endoscopic surgical procedures have attracted significant interest from patients with thyroid cancer, leading to the development of various endoscopic and robotic approaches. Although the cosmetic outcomes of current endoscopic and robotic thyroid surgeries have been excellent, all the procedures still require a large incision and extensive flap elevation. Transoral endoscopic thyroid surgery is a newly developed surgical method performed by inserting an endoscope through a mucosal opening created in the mouth, obviating the need for a skin incision. Additionally, the dissection area is relatively small and no dressings are required. Showering or shaving may resume the day after surgery and the port created within the oral mucous membrane generally heals within one week. Importantly, this approach is markedly less invasive than other endoscopic approaches. Although transoral endoscopic thyroid surgery has not yet been universally accepted, it may emerge as the preferred method for thyroid surgery in the near future.
산소도입 아크릴산 플라즈마 중합에 의한 폴리에스테르 직물의 표면개질
박준욱,김지현,Park, Joon-Wook,Kim, Ji-Hyun 한국섬유공학회 1996 한국섬유공학회지 Vol.33 No.9
For improvement of the hydrophilicity and dyeability, the plasma polymerization of acrylic acid onto polyester fabric was applied in an inductively coupled glow discharge system. During glow discharge, oxygen was added to increase the carboxyl and hydroxyl group of platoma polymerized acrylic acid (PP-AA). The surface characteristics of PP-AA/polyester fabric was investigated at various discharge power and pressure of oxygen. The chemical structure of PP-AA was similar to poly(acrylic acid). Owing to the excellent hydrophilicity of the PP-AA, the wettability of PP-AA/polyester fabric was improved. It was further improved if oxygen was introduced during the plasma polymerization. Dyeability of PP-At/polyester fabric with basic dye was improved due to the presence of the carboxyl group of PP-AA.
박준욱,김도현,손혜림,주영훈,조정해,박영학,김민식,선동일 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.2
Background and ObjectivesZZTreatment of head and neck cancer patients with surgical removal may result in some degree of dysphagia. Swallowing disorders depend on the site, the extent of surgical resection, and the nature of the surgical reconstruction. As a result, rehabilitation needs to be managed by head and neck surgeons with specific anatomical knowledge. However, in Korea, only occupational therapists can get approval for dysphagia rehabilitation from the national health insurance cooperation. Therefore, we designed a Advanced Rehabilitation Protocol (ARP) rehabilitation and carried out a comparative study against the current rehabilitation protocol. Subjects and MethodZZData were collected by reviewing medical records of 40 patients who received operation on oral cavity, larynx and hypopharynx from November 2007 to January 2009. Of these, 20 patients were treated with ARP under the management of head and neck surgeons but the other 20 patients were not. ResultsZZAlthough the results had no statistical significance, the study showed that ARP had the effect of shortening the rehabilitation and enabled them to start adjuvant therapies early. ConclusionZZRehabilitation needs to be managed cooperatively by a multidisciplinary team that includes an otolaryngologist who has specific anatomical knowledge of the concerned area and reconstruction according to specific swallowing problems. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:94-8