Fe-6 (Cu-Sn) 소결합금의 기계적 성질에 미치는 Sn 첨가량의 영향

박영도,김도연 대한금속재료학회(대한금속학회) 1983 대한금속·재료학회지 Vol.21 No.3

The effects oP Sn contents and sintering temperature on dimensional change, tensile strength and hardness of sintered Fe-6 (Cu-Sn) alloy were investigated. Due to liquid phase occuring during sintering, all the specimens showed dimensional expansion after sintering and the sintering temperature at which a relatively large expansion occured decreased with Sn content. Thus the addition of small amount of Sn in place of Cu aids the sintering operation because it lowers the liquid phase forming temperature. From mechanical property tests, it has been shown that the properties obtained from compacts of Fe-4Cu-2Sn composition sintered at 900℃ were similar to those obtained from Fe-6Cu compacts sintered at 1100℃. For the specimens with larger amounts of Sn, a significant decrease in tensile strength was observed. Therefore, it is concluded that the optimum ratio of Cu : Sn is 2 : 1. The microstructures of the sintered specimens are presented and an attempt is made to relate these to the mechanical properties and dimensional change after sintering.

펄스 및 모듈레이션 활용 시 저항, 레이저 및 초음파 용접에서 품질 개선의 한계는?

박영도 대한용접·접합학회 2023 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2023 No.10

신유가(新儒家)에서 내재적 초월의 구조와 그 의미

박영도(Young-Do Park) 한국사회학회 2003 韓國社會學 Vol.37 No.4

동일성을 절대화하는 보편주의적 독단의 위험과 차이를 절대화하는 상대주의의 회의주의적 위험을 모두 피할 수 있기 위해선 내재적 초월의 사유가 요구된다. 이 논문에서는 ‘일상생활 속에 머무르면서 일상생활을 초월한다’는 것을 최고의 경지로 간주해왔던 동아시아의 전통적 사유로부터 이 요구에 부응할 수 있는 가능성을 검토하려고 한다. 이런 문제의식에서 이 글은 신유가, 특히 성리학의 사유모델을 내재적 초월의 관점에서 비판적으로 재구성한다. 먼저 내재와 초월의 구별은 표기와 무기의 구별이 표기의 영역 속으로 재진입하면서 발생한다는 점을 지적하고, 이 관점에서 출발하여 신유가적 사유의 발생맥락을 조명하고, 신유가의 우주론적이고 탈목적론적인 내재적 초월의 문법을 해명한다. 마지막으로, 우주론적인 초월의 길이 무너진 현재, 탈목적론 적인 내재적 초월을 계승해 가는 하나의 길로서, 사회적 소통의 차원에서 내재적 초월의 문법을 구성하는 길을 스케치한다. Various forms of struggle for recognition in contemporary world require us to reconstruct anew the grammar of immanent transcendence to steer carefully between the dogmatism of the universalistic mode of thought and the relativism of the contextualistic mode of thought. The purpose of this paper is to seek, in the spirit of the comparative study of thoughts, a possibility to meet this requirement in the Neo-Confucian thought which, from the start, was characterized by the following formulation: ‘it transcends daily ordinary activities, yet it is not divorced from them.’ At first, I show that the distinction between the immanent and the transcendent is originated in the re-entry of the distinction between the marked and the unmarked into the marked. Based on this thought, I try then to explain the structural context of the rising of the Neo-Confucian thought in its debates with the Buddhist thought. And, then, I show that the Neo-Confucian model of the immanent transcendence is characterized by its cosmological framework of human/cosmology and its post-teleological structure. Finally, I show the reason why the cosmological framework can not work today and suggest to reconstruct the Neo-Confucian post-teleological structure of the immanent transcendence on the field of social communication.

Perioperative Surgical Complications and Learning Curve Associated with Minimally Invasive Transforaminal Lumbar Interbody Fusion: A Single-Institute Experience

박영,이수빈,석상옥,조병우,하중원 대한정형외과학회 2015 Clinics in Orthopedic Surgery Vol.7 No.1

Background: As surgical complications tend to occur more frequently in the beginning stages of a surgeon’s career, knowledge ofperioperative complications is important to perform a safe procedure, especially if the surgeon is a novice. We sought to identifyand describe perioperative complications and their management in connection with minimally invasive transforaminal lumbar interbodyfusion (TLIF). Methods: We performed a retrospective chart review of our first 124 patients who underwent minimally invasive TLIF. The primaryoutcome measure was adverse events during the perioperative period, including neurovascular injury, implant-related complications,and wound infection. Pseudarthroses and adjacent segment pathologies were not included in this review. Adverse eventsthat were not specifically related to spinal surgery and did not affect recovery were also excluded. Results: Perioperative complications occurred in 9% of patients (11/124); including three cases of temporary postoperative neuralgia,two deep wound infections, two pedicle screw misplacements, two cage migrations, one dural tear, and one grafted boneextrusion. No neurologic deficits were reported. Eight complications occurred in the first one-third of the series and only 3 complicationsoccurred in the last two-thirds of the series. Additional surgeries were performed in 6% of patients (7/124); including fourreoperations (two for cage migrations, one for a misplaced screw, and one for an extruded graft bone fragment) and three hardwareremovals (one for a misplaced screw and two for infected cages). Conclusions: We found perioperative complications occurred more often in the early period of a surgeon's experience with minimallyinvasive TLIF. Implant-related complications were common and successfully managed by additional surgeries in this series. We suggest greater caution should be exercised to avoid the potential complications, especially when surgeon is a novice to thisprocedure.

Congenital Anomaly of the Atlas Misdiagnosed as Posterior Arch Fracture of the Atlas and Atlantoaxial Subluxation

박영,김성민,Yun Tae Lee,유주형,오현철,하중원,성승용,윤한국,장지훈,정정열 대한정형외과학회 2014 Clinics in Orthopedic Surgery Vol.6 No.1

Partialor complete absence of the posterior arch of the atlas is a well-documented anomaly but a relatively rare condition. This condition is usually asymptomatic so most are diagnosed incidentally. There have been a few documented cases of congenital defects of the posterior arch of the atlas combined with atlantoaxial subluxation. We report a very rare case of congenital anomaly of the atlas combined with atlantoaxial subluxation, that can be misdiagnosed as posterior arch fracture.

팔마사지 방법에 따른 안면 조형효과 연구

박영은,김기연,장경자 대한피부미용학회 2006 대한피부미용학회지 Vol.4 No.2

With the progress of current skin beauty industry, a lots of beauty salons have conducted massage programmed with diverse products and therapies. It can be said that there are unmeasurably many massages carried out by the goal of a program. However, the expansion and demand of esthetic industry have brought up not a little side-effect due to the market extension of technical education. Unverified technique and program expansion are observed to be conducted at other place than institutionalized school or college. The flood of unverified technique may be detrimental to national health. For esthetic area to take its firm ground as an academic and technical one will ensure physiological research on massage technique and effectiveness suited human physiology. Thus this study strove to come up with underlying data of an effect on human body of arm massage direction, pressure, velocity basically practiced at most beauty salons in our country. Arm massage is practiced in a service type without charge, the hand and arm massage of which is based on stimuli. Also the paper reviewed the direction of arm massage effecting beauty face. The research defines 15 arm massage movements as an experimental model, designs it to strong upward arm massage(massage pressure applied in upward action) and strong downward arm massage(massage pressure applied in downward action), and regards pressure difference by arm massage direction as the factor of study scope. And it examined the form change of the face having the closest relation with the muscle connected to the arm. The results could confirm that the circumference of the arms subjected to the two massages. The subjects of the experimental group of strong upward group showed highly changed variant ratio in the arm circumference and facial length reduction, where arm massage is found to bring about transformation of facial muscle and muscular membrane through value change of facial length. This experiment findings suggest following matters. Adverse effect dispersed to the whole human body is high due to human stream resistant massage. Beauty-purposed massage should take into account the effect of velocity and pressure and direction on individuals. Based on academic data on massage direction, pressure, and velocity, strong upward massage would produce a good effect on face and arm parts.

안톤 체홉이 韓國의 近代演劇에 끼친 影響

박영은 중앙대학교 대학원 1999 중앙우수논문집 Vol.1 No.-

표기(表記)와 무기(無記) : 경계의 사유를 위하여

박영도 한국산업사회학회 2006 경제와 사회 Vol.0 No.72

[특집/합리성과 맑스주의 사회이론]맑스주의의 약한 부활과 의사소통 합리성

박영도 비판사회학회 1994 경제와 사회 Vol.- No.24

화학비료 및 퇴비의 장기 연용에 따른 고추의 수량성

박영은(Young Eun Park),이성은(Seong Eun Lee),박진면(Jin Myeon Park) 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.10