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CUBE File: A File Structure for Hierarchically Clustered OLAP Cubes [chapter]

Nikos Karayannidis, Timos Sellis, Yannis Kouvaras
2004 Lecture Notes in Computer Science  
Hierarchical clustering has been proved an effective means for physically organizing large fact tables since it reduces significantly the I/O cost during ad hoc OLAP query evaluation. In this paper, we propose a novel multidimensional file structure for organizing the most detailed data of a cube, the CUBE File. The CUBE File achieves hierarchical clustering of the data, enabling fast access via hierarchical restrictions. Moreover, it imposes a low storage cost and adapts perfectly to the
more » ... ive sparseness of the data space achieving a high compression rate. Our results show that the CUBE File outperforms the most effective method proposed up to now for hierarchically clustering the cube, resulting in 7-9 times less I/Os on average for all workloads tested. Thus, it achieves a higher degree of hierarchical clustering. Moreover, the CUBE File imposes a 2-3 times lower storage cost.
doi:10.1007/978-3-540-24741-8_36 fatcat:ujpbpl5vorfajfp3ei757nujci

Images of Sculptures in the Poetry of Giorgis Manousakis

Michał Bzinkowski, Rita Winiarska
2016 Classica Cracoviensia  
Many famous poets such as the first Nobel Prize winner in literature, George Seferis (1900-1971), as well as Yannis Ritsos (1909-1990) frequently use sculptural imagery in order to allude to, among other  ...  A significantly different approach to stones and sculptures can be traced in poetry of Yannis Ritsos, the poet belonging to the same so-called "generation of the thirties" as George Seferis.  ...  Highly admired in his native Crete, among others as the one that always placed his birthplace Chania as "the navel of the world" (Kouvaras 2008) , Manousakis' poetry is commented and analyzed rather seldom  ... 
doi:10.12797/cc.19.2016.01 fatcat:ryrdz7yqtrhd3pou5mpsachkcm

A survey of Late Bronze Age funerary archaeology over the last 25 years in the central and southern Aegean

Yannis Galanakis
2018 Archaeological Reports  
Kouvaras; 46. Chania, Gavrolimnis; 47. Katouna Perganti; 48. Kokkino Lithari; 49. Psara, Archontiki; 50. Dipi Lesvos; 51. Agia Agathi Malonas; 52. Chania; 53. Kera, Kalyves; 54. Panaztepe. identify.  ...  Another significant recent discovery is that of a 'warrior burial' in a cist tomb at Kouvaras (ID434) on the height of Rachouli, north of Lake Ozerou in Aetoloakarnania, in a strategic location overlooking  ... 
doi:10.1017/s0570608418000212 fatcat:2q6iw6krzvd5bikhbaocubjjyu

Four Decades Of Greek Artistic Presence In Paris (1970-2010): Theory And Interpretation

Sapfo A. Mortaki
2018 Zenodo  
Kouvaras, F.Michalea, G. Michas, A. Patsoglou, K. Polychronopoulos, E. Potaga, K. Rokos, G. Zoggolopoulos and O.  ...  witness much more radical new trends among Greek artists living in Paris and other European capitals, who open themselves to environments (Konstantinos Xenakis, Stathis Logothetis, Pavlos), constructions (Yannis  ... 
doi:10.5281/zenodo.1317220 fatcat:yguftexjzndmpejuh5a5vn6anm

A survey of Late Bronze Age funerary archaeology over the last 25 years in the central and southern Aegean

Yannis Galanakis, Apollo-University Of Cambridge Repository, Apollo-University Of Cambridge Repository
2018
Another significant recent discovery was that of a 'warrior burial' in a cist tomb at Kouvaras (ID434) on the height of Rachouli, north of Lake Ozerou in Aitoloakarnania, in a strategic location overlooking  ... 
doi:10.17863/cam.34373 fatcat:x2isqzytlfg5rexaa3xr5flhna