Hankook Tire Co., Ltd.

Lucky Limited

Electronics and Telecommunications Research Institute

Korea Telecommunication Authority

Korea Electrotechnology Research Institute

Sang Moo Lee

Sung Hee Youn

Su Jin Son

Sang Tak Joo

Mu Yeong Kim

Myoung Joong Lee

Hyun Jun Lee

Sang Soo Oh

Yong Hee Kim

Seong Moon Jung

Kyu Jung Song

Ho Seop Kim

Jae S Oh

Jung U Choi

Chul Woo Lee

Jae Sung Lee

Ye Hyun Jung

Yong Hwan Jung

Jae Eun Yoo

Jin Seop Kim

Sun Mi Lim

Do Jun Youm

A pneumatic tire for a vehicle is herein disclosed. The pneumatic tire includes a tread, side walls, and beads. A plurality of tread blocks and grooves are formed in the tread. Kerfs are formed in the tread blocks. Each kerf face of each of the kerfs includes a flange portion, a plurality of concave kerf portions, and a plurality of convex kerf portions. The flange portion is formed in the outermost portion of the tread. The concave kerf and convex kerf portions are connected to the flange portion, and are alternately formed in depth and lengthwise directions of the kerf. The concave kerf portions correspond to opposite convex kerf portions. The convex kerf portions correspond to opposite concave kerf portions. The concave and convex kerf portions are configured such that the protrusion directions of the concave and convex kerf portions are opposite to each other.

Pneumatic tire for vehicle

The present invention relates to a kerf structure for a snow tire, including a wave-shaped straight portion and an expansion portion formed expanding from the straight portion, wherein the expansion portion includes unit structures, on each of which central semi-sphere holes and polygonal forms around the semi-sphere holes form protrusions in opposite directions are formed continuously. According to the present invention, the kerf structure for a snow tire provides a symmetric shape, thereby securing uniform block rigidity regardless of the direction of the kerf, and the interlocking effect can be maximized through the combination of the protrusion shape of the polygonal shape and the embossing of the semi-sphere hole. In addition, according to the present invention, the tire performance on dry roads can be ensured by optimizing the collapse of the tire tread portion and the uniform performance of the traction can be maintained until the last stages of tread wear since the polygonal shape is maintained until the last stage of the wear even though the tire is worn.

Kerf structure for snow tire

The present invention provides a kerf structure for a snow tire, including unit structures on each of which spiral-shaped protrusions are continuously formed to be spaced a predetermined distance apart on the outer circumferential surface of a semi-cylindrical shaped column, wherein the continuously formed unit structures are arranged by alternating convex and concave portions in a zigzag formation, which is capable of optimizing the rigidity which can maintain gripping force as an original function of a kerf while ensuring a friction force generated from small blocks of a tread portion partitioned with kerfs by collapsing a block at an optimum level and further ensuring the kerf function on snow even in the last stages of tread wear by lowering the rigidity of the blocks of the tread portion.

Disclosed herein is a method of fabricating a high temperature superconducting film in a vacuum chamber through auxiliary cluster beam spraying using an evaporation method, wherein a high temperature superconducting material is deposited on a substrate in a vapor state by evaporating the high temperature superconducting material, and at the same time, a cluster beam material is formed into gas atoms by heating the cluster beam material charged in a housing, and the formed gas atoms pass through a nozzle of an inlet of the housing and then are sprayed and grown on the substrate in the form of the cluster beam, thereby forming pinning centers in the high temperature superconducting film.

Method and apparatus for fabricating high temperature superconducting film through auxiliary cluster beam spraying, and high temperature superconducting film fabricated using the method

An apparatus and a method for detecting scene change using difference of MAD(Mean Absolute Difference), so called dMAD wherein the method for detecting scene change using difference of mean absolute difference(dMAD) between image frames by use of scene change detecting apparatus comprising frame memory, first absolute calculator, accumulator, multiplicator, first latch circuit, second absolute calculator, first comparator, second comparator, selector and second latch circuit, the method comprising the steps of: (A) calculating MAD of the `n`th input image frame and checking whether scene change judgement variable, which is used for current frame according to scene change of previous frame, is `1`; (B) judging scene change only using MAD since current frame corresponds to the second frame of new scene when scene change variable is `1` at said step (a); (C) judging scene change using dMAD as scene change variable when scene change variable is not `1` at said step (a); (D) saving scene change state and MAD of the `n`th frame so as to use them for the processing of the `n+1`th frame.

Apparatus and method for detecting scene changes using the difference of

Process for the preparation of hydridocarbonyl tris (triorganophosphorus) rhodium compounds from a concentrated hydroformylation reaction mixture.

Preparation of hydridocarbonyl tris (triorganophosphorus) rhodium

A process for preparing N,N'-disubstituted urea derivatives of the following formula (I) ##STR1## wherein Ar represents an unsubstituted aromatic radical or an aromatic radical substituted with a halogen atom, an alkyl group, or an alkoxy group, which comprises reacting an aromatic mono-nitro compound, an aromatic primary amine, and synthesis gas in the presence of a catalyst consisting essentially of a divalent palladium compound as a main catalyst component and an ammonium or a phosphonium salt containing halogen atom as a co-catalyst component, and a non-polar solvent.

Process for preparing symmetric N,N'-disubstituted aromatic urea

A process for preparing N, N-disubstituted urea and more particularly, to an improved process for preparing N,N'-disubstituted urea derivatives of the following formula (I) comprising ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 represents unsubstituted aromatic radical or aromatic radical substituted with halogen, atom, alkyl group, or alkoxy group, and Ar.sup.1 and Ar.sup.2 are the same or different, reacting aromatic mono-nitro compound, aromatic primary amines, and carbon monoxide in the presence of the catalyst composition consisting of a palladium compound as a main catalyst and an ammonium or a phosphonium salt containing halogen atom aS a co-catalyst, and a non-polar solvent.

Process for preparing N,N'-disubstituted urea

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Daejeon, South Korea

Sang Moo Lee