Influence of Contact Area Deformation Distribution of Tire on Tire Noise, Rolling Resistance and Dry Grip Performance

Guolin Wang,Kangying Yu,Chen Liang,Ye Mei 한국자동차공학회 2021 International journal of automotive technology Vol.22 No.1

Most tire properties are closely related to the pattern deformation. In order to explore the relationship between tire performance and defined deformation parameters in the contact area between the pneumatic tire and road surface, ten types of 205/55R16 passenger car radial (PCR) tires were selected as the research objects. Using VIC-3D non-contact strain measurement system and by subdividing the contact area, the pattern deformation in contact area under vertical load was tested, and the relevant deformation parameters of the contact area were extracted. Correlation analysis was used to establish the relationship between the identified deformation parameters and tire performance indicators. Then an evaluation method of tire performance based on the deformation parameters was proposed, as well as clarification of the contradictory mechanism between tire noise, rolling resistance and dry grip performance. While the results indicate tire noise having a significant negative correlation with radial deformation in the contact area, rolling resistance coefficient gave a significant positive correlation with its equivalent strain in the XY plane of the contact area, and dry braking distance positively correlates with tensile strain in the Y direction of contact area and negatively correlates with tensile strain in the X direction of the contact area.

High - Temperature Materials : EXPLORATION OF HOT - SALT STRESS - CORROSION OF Ti811 ALLOY

Zhao Yongqing,Zhu Kangying,Li Zuochen,Wu Qingzhi 대한금속재료학회 ( 구 대한금속학회 ) 1995 Advanced Material and Processing Vol.3 No.-

Facile Synthesis of Graphene–Enwrapped Ag3PO4 Composites with Highly Efficient Visible Light Photocatalytic Performance

Shi Lei,Da Chen,Wenting Xie,Jing Zhang,Guangxing Ping,Meiqiang Fan,Laishun Qin,Liqun Bai,Zhi Chen,Chunju Lv,Kangying Shu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.1

In this work, thermally exfoliated graphene nanosheets (GNS) were employed to prepare novel Ag3PO4–GNS composite photocatalysts by a facile chemical precipitation approach. The asprepared Ag3PO4–GNS composite photocatalysts were characterized by X-ray diffraction (XRD) pattern, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman spectroscopy, thermogravimetric (TG) analysis, ultraviolet-visible diffuse re-flectance spectroscopy (DRS) and photoluminescence (PL) spectra. It was found that the Ag3PO4 particles were well deposited on the surfaces of GNS. Compared with bare Ag3PO4 and Ag3PO4–rGO composite, the Ag3PO4–GNS composite exhibited enhanced photocatalytic activity for the photodegradation of rhodamine B (RhB) under visible light irradiation. The photocatalytic degradation rate of Ag3PO4–GNS composite was 1.7 times that of bare Ag3PO4 and about 1.3 times that of Ag3PO4–rGO for the degradation of RhB. Furthermore, the photocatalytic stability of Ag3PO4–GNS composite was also greatly enhanced. This enhanced photocatalytic activity and stability could be ascribed to the positive synergetic effects between the Ag3PO4 particles and GNS sheets, which could provide a greater number of active adsorption sites, suppress charge recombination and reduce the serious photocorrosion of Ag3PO4. Moreover, the photocatalytic degradation of RhB over Ag3PO4–GNS composites was also optimized, suggesting that the optimal amount of GNS in the composites was 11.4 wt.%. This work shows a great potential of Ag3PO4–GNS composite for environmental treatment of organic pollutants.

IL-18 Induces Emphysema and Airway and Vascular Remodeling via IFN-γ, IL-17A, and IL-13

Kangi, M.-J.,Choi, J.-M.,Kimi, B.H.,Lee, C.-M.,Cho, W.-K.,Choe, G.,Kim, D.-H.,Lee, C.G.,Ellas, J.A. American Thoracic Society 2012 American journal of respiratory and critical care Vol.185 No.11

미디어로서의 의복의 속성 및 상호관계성 - 재매개 이론을 중심으로 -

김지인 ( Kim Ji-in ),강혜승 ( Kangi Hae-seung ) 한국디자인트렌드학회 2012 한국디자인포럼 Vol.34 No.-

본 연구는 미디어로서의 의복의 속성에 주목하고, 의복과 다른 미디어의 상호매개 관계를 살펴보았다. 이를 바탕으로, 디지털 기술의 발달과 함께 등장한 웨어러블 컴퓨터와 스마트 의류와 같은 디지털 매체적 특성을 가지는 의복의 방향에 대해서도 조망해보고자 했다. 본 연구에서는 마셜 맥루헌이 의복을 미디어로 규정했던 연구에 근거하여, 의복이 독립된 하나의 미디어로서 다른 미디어와 적극적으로 상호 매개를 하고 있는 것으로 판단했다. 이어 볼터와 그루신의 재매개 이론을 분석의 틀로 사용하여 미디어로서의 의복의 특성을 규명하고, 다른 미디어와 어떠한 방식으로 상호매개 해왔는가를 분석했다. 그 결과, 미디어로서의 의복은 물질적으로는 하이퍼매개적이지만, 자아의 측면에서는 하이퍼매개적 측면과 비매개적 측면을 동시에 지니고 있음을 알 수 있었다. 또한 사회적인 측면에서는 투명한 비매개적 매체라 규정할 수 있었다. 다른 미디어와의 관계에 대한 연구를 통해서는 의복이 회화, 조각과 같은 예술 미디어와 기술적 미디어, 즉 테크놀러지와 다양한 방식으로 상호 재매개하며 변화되어 왔음을 알 수 있었다. 그동안의 새로운 기술들은 의복의 형식을 대부분 그대로 수용하는 재매개 방식이었다. 반면, 유비쿼터스 컴퓨팅의 개념이 대두되면서, 다른 미디어에서 적극적으로 의복과의 교류를 필요로 하게 되면서 새로운 미디어가 의복을 개선 및 개조하기 시작한 것으로 보인다. 사회적으로, 심리적으로 뉴테크놀러지와 결합된 의류가 받아들여지지 못하고 있는 것은 이로 인한 반투명, 불투명한 특성에 기인함을 알 수 있었다. This study focused on a characteristic of clothing as a medium and contemplated the interrelationship with clothing and other media. In addition to this, this study also tried to get a perspective of the progression of clothing that has the characteristic of digital media such as a wearable computer and smart clothing. In this study, based on Mcluhan`s definition, clothing as a way of media, clothing was viewed as an independent medium that intermediates with other media actively. Using Bolter&Grusin`s remediation theory as an analytical frame, this study defined characteristics of clothing as a medium and analysed the way of intermediation of clothing with other media. As a result, it is concluded that clothing as a material has hypermediacy but clothing as the tool of self reflection has hypermediacy and immediacy simultaneously. And viewed clothing from social aspect, it is a transparent and immediate medium. From antecedent studies on the relationships with other media, it is clear that clothing has been changing through diverse intermediation with artistic media, such as paintings and sculptures, and technological media. New technologies so far has been remediated with clothing as the way kept the form of clothing unchanged. Recently, with the appearance of the concept of ubiquitous computing, new media has been started to improve or refashion clothing from the needs to communicate with clothing more actively. It is the conclusion of this study that the reason clothing combined with new technology has not been accepted socially and psychologically stems from translucent and opaque character of clothing.

시설보호 아동의 사회적 관계망 특성에 대한 연구

성미영 ( Mi Young Sung ),이강이 ( Kangy I Lee ) 대한아동복지학회 2005 아동복지연구 Vol.3 No.2

본 연구에서는 서울 소재 4개 보육원에 근무하고 있는 총 18명의 보육사를 대상으로 시설보호 아동의 사회적 관계망 특성에 대해 살펴보았다. 시설보호 아동의 일상생활을 가장 근거리에서 함께 하고 있는 보육사와의 면접을 통해 시설보호 아동이 가지고 있는 사회적 관계망이 어떤 특성을 보이는지, 그리고 시설적응의 양상에서는 어떤 특징이 발견되는지 살펴봄으로써 보육사의 시각에서 시설보호 아동을 둘러싼 사회적 관계망의 실태와 각각의 관계망이 시설보호 아동의 생활에서 갖는 의미를 탐색해보는 것이 연구의 목적이다.보육사와의 면접을 통해 시설보호 아동의 사회적 관계망과 시설적응의 특성을 살펴본 결과, 시설보호 아동의 부모자녀관계와 형제자매관계의 경우 혈연이 주는 심리적 안정감이 시설아동의 생활에 작용하는 것으로 나타났다. 그러나 시설아동의 또래관계와 보육사와의 관계에서는 이중적인 태도가 나타남을 확인할 수 있었고, 특히 또래관계의 경우 밖에서는 결속된 모습을 보이지만 안에서는 서로 배려하지 못하는 모습이 나타났다. 낮은 수준의 자존감과 피해의식 등으로 인해 사회적 관계와 관련된 능력에서 취약성을 보이는 시설보호 아동의 사회적 능력을 키우는 프로그램을 지속적으로 제공해 줄필요성이 있다. 본 연구는 시설아동의 일상생활에서 가장 밀접한 관계를 맺고 있는 보육사의 목소리를 통해 시설아동의 생활과 이들이 보이는 사회적 관계망의 특성 및 관심을 가져야 할 문제점에 대해 접근해보았다는 점에서 의의를 가진다. The purpose of this exploratory study is to investigate major characteristics of institutionalized children`s social networks through interviewing their house parents in residential care facilities. Eighteen house parents were selected from four RCFs in Seoul. They were asked to discuss issues related to the characteristics of institutionalized children`s social networks. The major findings were as follows: There were the differences in institutionalized children`s psychological adjustment according to correspondences with parents. Children who have never or ever visited parents expressed eagerness for seeing them. Especially, children frequently showed their expression for seeing parents in the early period of entering the institution, right after visiting parents, and being younger than others. In conclusion, this study offered realistic understanding and effective information of institutionalized children`s social networks in RCFs. Practical implications for planning sponsor programs for children having no correspondence with parents can be suggested.

Bilateral Comparison of Mass Standards Between the UME (Turkey) and the KRISS (Korea)

이성준,정진완,김광표,Sevda Kacmaz,Levent Yagmur,Lenara Kangi 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2

A bilateral comparison of mass standards of 100 mg, 100 g and 2 kg was carried out between the Ulusal Metroloji Enstitusu (UME, Turkey) and the Korea Research Institute of Standards and Science (KRISS, Korea) during the period from December 2005 to June 2006. For 100 g and 2 kg, the difference between the data obtained at the UME and those obtained at the KRISS was less than the combined uncertainty for the two standards. This result demonstrates accordingly, the metrological equivalence between the UME and the KRISS in dierent regions. Showing instability, 100 mg weight showed a degree of equivalence is larger than one. Despite this point, the measurement capability can still be validated because each uncertainty was within less than one-third the maximum permissible error (∽1.6 μg) for an E1 class weight.

비선형 초음파를 이용한 주조 오스테나이트 스테인리스 강의 열 취화 손상 평가

김종범(Jongbeom Kim),오세범(Se-Beom Oh),김진겸(Jin-Gyum Kim),강성식(Sung-Sik Kangi) 한국비파괴검사학회 2022 한국비파괴검사학회 춘계학술대회 초록집 Vol.2022 No.5