As the genitive is different, I wouldn't call it similar. :-) The declension of "kein" is the same as "ein"; after all, "kein" is just "nicht ein". "Dies" is an adverb, the demonstrative pronoun is "dieser/diese/dieses" (though sometimes "dieses" is shortened to "dies", especially in older German). It's probably best to memorize the declension of the demonstrative prounouns seperately, see http://www.mein-deutschbuch.de/lernen.php?menu_id=79 There are of course similarities between "der/die/das", "dieser/diese/dieses", "jener/jene/jenes", and the strong declension of adjectives when there is no article, because the endings serve a similar purpose (primary indication of genus/casus/numerus in addition to the noun). I wouldn't call this "applying the strong adjective declension to other cases", though, and I wouldn't recommend thinking of it that way.

Hello, adjectives can be used in many different ways: Das Auto ist rot. > The car is red. - Here, the adjective is part of the verb, it is used predicatively. It is necessary. You can NOT say: Das Auto ist.... Peter fährt das rote Auto. - Peter is driving the red car. - Here, the adjective describes the noun "Auto" - the adjective is used attributively: Peter fährt das Auto - is still a sentence. Here are some examples: http://graf-gutfreund.at/daf/02grammatik/03adjektiv/gr1_deklination.pdf