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- 저자 : Park (박현배), Hyunbae (검색결과 29 건)
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전재석(Jaeseok Jeon),박현배(Hyunbae Park),문희석(Heeseok Moon),곽수진(Sujin Kwag) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
In this paper, we described about evaluation of human sensibility using park assist system of the commercial vehicle. The perpendicular parking and parallel parking have been carried out as a user test and subjects are classified as beginning drivers, drivers with less than 1 year experience and over 3 years experience. As a result, parking duration of beginning drivers and drivers with less than 1 year experience who use automatic parking assistance system is similar to drivers with over 3 years experience. However error occurred according to sensor position and distance between vehicle and parking space. And also it occurred that the vehicle leaves from parking line or does not recognize the parking space. Therefore, if we improve its completeness by compensating problems that came up from this evaluation and distribute the automatic parking assistance system, it is expected that the park assistance system is to help driver providing convenience of parking.
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박현배,한경수,진태호,Park, Hyun-Bae,Han, Kyung-Soo,Jin, Tai-Ho 대한치과보철학회 1999 대한치과보철학회지 Vol.37 No.3
This study was performed to investigate the factors related to tooth wear. For this study, 78 patients with temporomandibular disorders and 76 dental students without any signs and symptoms of temporomandibular disorders were selected as the patients group and as the normal group, respectively. Preferred chewing side, Angle's classification, lateral guidance pattern, head and shoulder posture were observed clinically. Electromyographic activity of anterior temporalis and masseter muscle were recorded with $BioEMG^{(R)}$ and occlusal status were recorded with $T-Scan^{(R)}$. Wear facet area of each tooth was measured from working model of upper arch corresponding to the occlusal status from T-Scan. Wear facet area were measured with planimeter in $mm^2$. Total area were divided into incisal, canine, posterior tooth area. Anterior wearfacet area was incisor area plus canine area, and unilateral area was anterior area plus posterior area. The data collected were analyzed by SAS statistical program and the results of this study were as follows: 1. There was no significant difference between the two groups in total werafacet area, and male subjects showed tendency to have larger area in the normal group but female subjects showed tendency vice versa. 2. There was no significant difference related to preferred chewing side and Angle's classification, however some difference was observed by lateral guidance pattern. Anterior wear facet area in subjects of canine guidance was the largest in the three subgroups. 3. Subjects with head tilting to right side had larger posterior and total area, and subjects with higher shoulder in right side had larger canine and anterior area than any other subgrous. 4. Electromyographic activity of masseter muscle was more correlated with wear facet area than anterior temporalis muscle, and tooth contact number and force were significantly correlated with wear facet area, but the most important factor affecting tooth attrition was age.
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Madymo(HybridII) / Muti-Body의 매칭을 통한 탑승자 거동 경향 분석 모델 제안
박현배(Hyunbae Park),전재석(Jaeseok Jeon),문희석(Heeseok Moon),곽수진(Sujin Kwag) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Prior to the development of a system that considers the safety of the occupant, research of the behavior of the occupant state is necessary. In addition, the information about the occupant body type, the type of the vehicle and its condition is also important. It is necessary to study the behavior of the state of the occupant in an environment where the internal structure of the vehicle is taken into account. In this paper, a multi-body model for analysis of the occupants in various environment is suggested. It is based on Madymo (HybridII) and the modeling is done by matching the value of the result. Error for the match is ± 1.5cm. Suggested model can be used to analyse the occupant for variety of environments. The new model can be applied through the matching of the result value.
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Park (박현배), Hyunbae,Komatsu, Eiichiro,Shapiro, Paul R.,Koda, Jun,Mao, Yi American Astronomical Society 2016 The Astrophysical journal Vol.818 No.1
<P>Cosmological transverse momentum fields, whose directions are perpendicular to Fourier wave vectors, induce temperature anisotropies in the cosmic microwave background via the kinetic Sunyaev-Zel'dovich (kSZ) effect. The transverse momentum power spectrum contains the four-point function of density and velocity fields, <delta delta nu nu >. In the post-reionization epoch, nonlinear effects dominate in the power spectrum. We use perturbation theory and cosmological N-body simulations to calculate this nonlinearity. We derive the next-to-leading order expression for the power spectrum with a particular emphasis on the connected term that has been ignored in the literature. While the contribution from the connected term on small scales (k > 0.1 h Mpc(-1)) is subdominant relative to the unconnected term, we find that its contribution to the kSZ power spectrum at l = 3000 at z < 6 can be as large as ten percent of the unconnected term, which would reduce the allowed contribution from the reionization epoch (z > 6) by twenty percent. The power spectrum of transverse momentum on large scales is expected to scale as k(2) as a consequence of momentum conservation. We show that both the leading and the next-to-leading order terms satisfy this scaling. In particular, we find that both of the unconnected and connected terms are necessary to reproduce k(2).</P>
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박현배(Hyun Bae Park),김용은(Yongeun Kim),조현종(Hyun-Jong Cho),문희석(Hee Seok Moon) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
Induction generator requires an excitation current to generate a rotating magnetic field by magnetize the iron core. Self-Excited generator is consist of inductor and capacitor. It is cheaper and maintenance is easier, so it has been applied to wind power. Self-Excited generator utilizes the principles of mutual resonance inductor and the capacitor so it generates a high voltage and greater the heat in the rotor. Therefore Power of Self-Excited generator should be controled by voltage control. In this paper, We implemented Controller of Resonant voltage and we verified the controller operating performance by motor dynamo.
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박현배(Hyun Bae Park),김용은(Young Eun Kim),전재석(Jae Seok Jeon),우사무엘(Samuel Woo),문희석(Hee Seok Moon) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
Recently, the security for communication of automotive is become an issue due to hacking. In case of CAN communication used as a control signal of a vehicle, a single twisted wire is used for communication, which makes it easy to access for hacking. Also, because of using the ‘recessive’ and ‘dominant’ logic, it is possible to attack the bus using these CAN communication characteristics. Recently, a method to manipulate a specific control field to cause a bus off error has been reported in the paper. In this paper, we describe how fully manipulated data can be received at Receiver(ECU) and we propose a method to prevent manipulation by changing the end of frame filed.
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제2형 당뇨병성 말초신경병증을 치료하기 위한 항산화요법에 대한 고찰
박현배(Hyun Bae Park),김지성(Ji Sung Kim),한상배(Sang-Bae Han) 대한약학회 2018 약학회지 Vol.62 No.2
Diabetic peripheral neuropathy (DPN) is a nerve damage caused by chronically high blood glucose and dia-betes. It leads to loss of sensation and sometimes pain in feet, legs and hands. More than 50% of type 2 diabetic patients will develop this complication. To date, the pathogenesis of DPN remains unclear. However, hyperglycemia, metabolic imbal-ance, and oxidative stress appear in the neurons of DPN patients. In addition, oxidative stress results in the change of poly-ADP-ribose polymerase, advanced glycation end products, polyol, protein kinase C, and hexosamine and causes endothelial cell damage and vascular dysfunction, consequently causing peripheral nerve ischemia and hypoxia. According to the oxi-dative stress and related pathways of DPN, some drugs are used in clinical treatment, such as taurine, acetyl-L-carnitine, aldose reductase inhibitors (epalrestat, ranirestat), α-lipoic acid (ALA), protein kinase C inhibitor (ruboxistaurin), inhibitor of poly ADPribose polymerase (nicotinamide), angiotensin-converting enzyme inhibitor (trandolapril), and advanced gly-cation end product inhibitors (aspirin, benfotiamine). However, no drugs can completely cure it. In this review, we sum-marize the pathogenesis of DPN and suggest that amifostine, which is clinically used as an antioxidant, might be used for the treatment of DPN.
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재 사용된 IPS-empress ingot의 pressing accuracy에 관한 연구
송병권,박현배,오상천,진태호,Song, Byung-Kwen,Park, Hyun-Bae,Oh, Sang-Chun,Jin, Tae-Ho 대한치과보철학회 1997 대한치과보철학회지 Vol.35 No.2
IPS-empress system is one of widely used all ceramic system. The purpose of this study was to determine the pressing accuracy of reused IPS%Empress ingot. 10 specimens were made using new ingot first, and using the rests of the specimen the another group of specimens were made next. finally, the third group of specimens were made with same procedure mentioned above. The results obtained in this study were as follows ; 1. The pressing accuracy of the first group of specimen was 96.1%, that of the second group was 95.4%, and that of the third group was 95.4%. There was no statistical significance among them, that is, the reuse of the IPS-Empress ingot did not influence on the pressing accuracy. 2. the common site of the defect in pressed ingot was central area at the margin opposite of sprue hole.
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