cognitive science technical reports ircs institute research cognitive science publishes series technical reports representing papers drawn fields computer information science linguistics mathematics neuroscience philosophy psychology bound versions technical reports available institute small fee online versions current 1994 technical reports freely available online attached list abstracts recently published papers entire abstract list submitted linguist listserv file requests technicalreports sent jodi kerper institute research cognitive science 3401 walnut street suite 400c philadelphia pa 191046228 requests copies include check money order made payable trustees university pennsylvania line versions reports may obtained via anonymous ftp address ftp cis upenn edu directory pub ircs technicalreports reports stored compressed postscript files listed tr number reports may also obtained electronic mail sending message send guide ircsserv ftp cis upenn edu receive reply containing guide using information server program recent ircs reports ircstr 19911994 technical report series abstract listing 19911994 report contains list technical papers abstracts including papers 19911993 charge ircs94 14 3 69 general framework hybrid substructural categorial logics mark hepple recent categorial proposals employed structural modalities modal operators allow explicit management resource sensitivity linguistic derivation various theoretical computational practical problems arise use operators propose alternative general model hybrid substructural systems different substructural logics e logics differing resource usage characteristics brought together single system eliminates need structural modalities exploiting natural relations different substructural levels terms relative informativeness characterizations model range substructural levels form single unified descriptive system facilitate writing grammars individual languages provide better basis crosslinguistic generalization ircs94 15 1 05 binding control ccg relatives mark steedman ccg account unbounded constructions particular relativisation coordination generalizes notion surface structure way disrupts traditional notions dominance command led researchers frameworks suggest theory fundamentally incompatible coherent theory binding control bounded constructions present paper offers theory binding ccg preserves original account unbounded dependencies renders immediately compatible theories tag particular theory requires abandonment one assumption traditional though essential categorial approaches significance move discussed ircs94 16 3 66 null subjects early child english theory economy projection tom roeper bernhard rohrbacher paper present new evidence showing empty subjects produced young children acquiring english subsumed performance limitation analysis bloom 1990 topic drop analysis rizzi 1994 argue contra sano hyams 1994 missing subjects instances pro pro demonstrate economybased prodrop theory speas 1994 handles data elegant fashion analysis propose links acquisition subjects acquisition functional morphology accordance minimalist program developed since chomsky 1989 one desirable consequence approach taken recourse prodrop parameter necessary ircs94 17 3 41 kolmogorov complexity information content parameters robin clark key goal linguistic theory account logical problem language acquisition particular linguistic constraints taken constraining learner hypothesis space reducing computational burden paper motivate information theoretic approach explaining linguistic constraints particular theory attempts relate ease acquisition simplicity linguistic representations frequency learner input text end paper reviews results information theory kolmogorov complexity relates theory parameters ircs94 18 87 active part decomposition shape motion estimation articulated objects physics based approach ioannis kakadiaris dimitri metaxas ruzena bajcsy present novel robust integrated approach segmentation shape motion estimation articulated objects initially assume object consists single part fit deformable model given data using physicsbased framework object attains new postures decide based certain criteria replace initial model two new models criteria based model state given data fit models data using novel algorithm assigning forces data two models allows partial overlap determination joint location approach applied iteratively object moving parts identified furthermore define new global deformations demonstrate technique series experiments kalman filtering employed account noise occlusion ircs94 19 92 active motion based segmentation human body outlines ioannis kakadiaris dimitri metaxas ruzena bajcsy present integrated approach towards segmentation shape estimation human body outlines initially assume human body consists single part fit deformable model given data using physicsbased shape motion estimation framework actor attains different postures new protrusions emerge outline model changes shape using new representation scheme consisting parametric composition deformable models representation allows us identify underlying human parts gradually become visible monitoring evolution shape motion parameters composed models algorithm applied iteratively subsequent frames moving parts identified demonstrate technique series experiments encouraging results