Abstract: A supported metallocene catalyst includes a carrier and a metallocene component. The carrier includes an inorganic oxide particle and an alkyl aluminoxane material. The inorganic oxide particle includes at least one inorganic oxide compound selected from the group consisting of an oxide of Group 3A and an oxide of Group 4A. The alkyl aluminoxane material includes an alkyl aluminoxane compound and an alkyl aluminum compound that is present in amount ranging from greater than 0.01 wt % to less than 14 wt % base on 100 wt % of the alkyl aluminoxane material. The metallocene component is supported on the carrier, and includes one of a metallocene compound containing a metal from Group 3B, a metallocene compound containing a metal from Group 4B, and a combination thereof. A method for preparing the supported metallocene catalyst and a method for preparing polyolefin using the supported metallocene catalyst are also disclosed.

Abstract: In an exhaust assembly, each particular louver of a plurality of louvers may be hingedly coupled to a generally circular bracket and may be arranged with respect to the air mover and each other such that in the presence of airflow generated by the air mover, the plurality of louvers rotate to an open position relative to the generally circular bracket under force of the airflow such that airflow passes freely through the exhaust assembly and in the absence of air flow generated by the air mover, at least one of the plurality of louvers rotates to a closed position relative to the generally circular bracket under force of gravity and mechanically interacts with a remainder of the plurality of louvers such that all of the plurality of louvers rotate to the closed position such that flow of air through the exhaust assembly is blocked by the plurality of louvers.

Abstract: A chassis is disclosed that includes a first sidewall, a second sidewall and a baffle having a plurality of penetrations, a first side and a second side and configured to be inserted into the chassis between the first sidewall and the second sidewall. An air block is disposed in each penetration, wherein each air block can be selectably configured in either a closed position to prevent air flow or an open position to allow air flow.

Abstract: In an exhaust assembly, each particular louver of a plurality of louvers may be hingedly coupled to a generally circular bracket and may be arranged with respect to the air mover and each other such that in the presence of airflow generated by the air mover, the plurality of louvers rotate to an open position relative to the generally circular bracket under force of the airflow such that airflow passes freely through the exhaust assembly and in the absence of air flow generated by the air mover, at least one of the plurality of louvers rotates to a closed position relative to the generally circular bracket under force of gravity and mechanically interacts with a remainder of the plurality of louvers such that all of the plurality of louvers rotate to the closed position such that flow of air through the exhaust assembly is blocked by the plurality of louvers.

Abstract: A liquid cooling device includes a heat absorbing part, a first transmitting tube, a second transmitting tube, and a heat dissipation part, wherein the heat absorbing part has a heat block, a first expansion pipe, and a second expansion pipe. The heat block is connected to an external heat-generating component, and includes a plurality of flow channels to facilitate the flow of a coolant for absorbing the heat generated from the external heat-generating component. The first expansion pipe and the second expansion pipe are connected to the heat block respectively. The first transmitting tube and the second transmitting tube are connected to the heat dissipation part respectively to form a cooling cycle among the heat absorbing part, the first transmitting tube, the second transmitting tube, and the heat dissipation part for allowing the cooling fluid to circulate in the cycle.

Abstract: A thermal module includes a base including a first plate having a first side for connecting with a first heat source so as to conduct heat generated by the first heat source, and a second plate connected to the first plate. A height difference is formed between the first plate and the second plate. The second plate includes a second side opposite to the first side of the first plate for connecting with the second heat source so as to conduct heat generated by the second heat source. The thermal module includes a heat-dissipating device connected to the base for dissipating the heat transmitted to the first plate and for dissipating the heat transmitted to the second plate. A height difference is formed between the first heat source and the second heat source, and the base is positioned between the first heat source and the second heat source.