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Akio Matsunaga Toru Wakimoto The introduction of a large amount of EGR gas into cylinders is effective for reducing exhaust emissions in diesel engines. As combustion characteristics under the condition of higher EGR rate are highly influenced by the amount of intake charge gas and its composition. It requires a precise control method for preventing the increase of NOx and particulate matter PM in spite of the transient conditions of supercharging and tolerance of turbocharger. In this study, a new control method was developed based on the observed oxygen concentration of charge gas and excess air ratio stands for the oxygen concentration of burnt gas which are the main physical factors governing NOx and PM formation.

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Information storage: do soft hairs exist on black holes? Conventional thinking going back to Albert Einstein is that a black hole can be described only in terms of its mass and spin. No-hair means that information about the physical state of matter must be lost as the matter is sucked into a black hole — otherwise, this information would distinguish one black hole from another. In Hawking made the landmark conjecture that black holes do not simply suck in everything, but rather behave as black bodies that emit radiation as well as absorbing it.

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Overview Moles form on your skin when clusters of melanocytes, or pigmented skin cells, grow in small, concentrated areas. They usually appear as colored bumps or spots that vary in shape and size and are darker than the rest of your skin. They usually ranging from tan to brown to black.

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The second bedroom is perfect for an office. " Chris reached up and tucked a strand of hair behind my ear, a crooked grin on his face. "You've got it all planned out, don't you?" "You think it's a stupid idea.

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I'd wanted my mom more than anything at that moment. Chris had come home from work to find me in bed. I hadn't had the heart to tell him yet. He didn't even know I'd been pregnant.

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