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Evaluation of Iceberg Distance Joins [chapter]

Yutao Shou, Nikos Mamoulis, Huiping Cao, Dimitris Papadias, David W. Cheung
2003 Lecture Notes in Computer Science  
doi:10.1007/978-3-540-45072-6_16 fatcat:sllmgbkdgnghnileb57cvahixy

Optimizing Iceberg Queries with Complex Joins

Brett Walenz, Sudeepa Roy, Jun Yang
2017 Proceedings of the 2017 ACM International Conference on Management of Data - SIGMOD '17  
In practice, iceberg queries are often posed over complex joins that are expensive to evaluate.  ...  This paper proposes a framework for combining a number of techniques-a-priori, memoization, and pruning-to optimize iceberg queries with complex joins.  ...  [17] extends the concept of iceberg queries to iceberg distance joins for spatial queries, returning object pairs that are within a maximum distance with one pair occurring at a high frequency.  ... 
doi:10.1145/3035918.3064053 dblp:conf/sigmod/WalenzR017 fatcat:x7zvmf5vdnhyxmhhzjsi3itq5m

In-Network Processing of an Iceberg Join Query in Wireless Sensor Networks Based on 2-Way Fragment Semijoins

Hyunchul Kang
2015 Sensors  
An iceberg join is a special type of join where only those joined tuples whose cardinality exceeds a certain threshold (called iceberg threshold) are qualified for the result.  ...  We investigate the in-network processing of an iceberg join query in wireless sensor networks (WSNs).  ...  Figure 1 . 1 An Example of an Iceberg Join Query.  ... 
doi:10.3390/s150306105 pmid:25774710 pmcid:PMC4435171 fatcat:vf2krpiebrcjlot3qx4ucvotk4

Iceberg stability during towing in a wave field [article]

Trygve K. Løken
2021 arXiv   pre-print
As icebergs are dynamic mediums, the study of icebergs in relation to safe human operations requires the rigorous analysis of the ice-ocean interaction, in particular with waves and currents.  ...  In two of the cases, the iceberg flipped over partly or entirely after some towing time.  ...  scheme (DOFI, Grant number 28062) and the Arctic field Grant scheme (Investigation of iceberg dynamics in Isfjorden, Grant number 310691).  ... 
arXiv:2104.02384v1 fatcat:xrtqgrigpnhepjfh4urg6cwq6u

Evaluation of Top-k OLAP Queries Using Aggregate R–Trees [chapter]

Nikos Mamoulis, Spiridon Bakiras, Panos Kalnis
2005 Lecture Notes in Computer Science  
A straightforward method to evaluate a top-k OLAP query is to compute the aggregate value for each group and then select the groups with the highest aggregates.  ...  An example of such a query is "find the 10 combinations of product-type and month with the largest sum of sales".  ...  As we show, our method can evaluate ad-hoc top-k OLAP queries and iceberg queries by only a part of the base data, only once.  ... 
doi:10.1007/11535331_14 fatcat:rfbr2lvlpvajpm5uinfzfw4uli

Optimization of Spatial Joins on Mobile Devices [chapter]

Nikos Mamoulis, Panos Kalnis, Spiridon Bakiras, Xiaochen Li
2003 Lecture Notes in Computer Science  
In this paper, we present a framework for optimizing spatial join queries that belong to this class.  ...  Mobile devices like PDAs are capable of retrieving information from various types of services.  ...  Iceberg Spatial Distance Semi-joins Our framework is especially useful for iceberg join queries.  ... 
doi:10.1007/978-3-540-45072-6_14 fatcat:nktb6sftubhbtcicu7tn7b6zna

Using Vertically Integrated Ocean Fields to Characterize Greenland Icebergs' Distribution and Lifetime

Juliana M. Marson, Paul G. Myers, Xianmin Hu, Julien Le Sommer
2018 Geophysical Research Letters  
Moreover, we find that icebergs breaking off from the southeast part of Greenland compose most icebergs reaching the middle of the Labrador Sea-a region where iceberg melt may affect ocean circulation  ...  This study applies an iceberg model that uses integrated ocean fields (from surface to iceberg keel) to simulate the drift and decay of Greenland icebergs.  ...  We gratefully acknowledge the financial and logistic support of grants from the Natural Sciences and Engineering Research  ... 
doi:10.1029/2018gl077676 fatcat:4or22zhgkbfivbhovtyolo25zy

Athlete's Mood State before Artistic Gymnastics Competitions

Carlos Eduardo Lopes Verardi, Vinicius Barroso Hirota, Igor Malinosqui Rinaldi, Marina Pavão Battaglini-Mattos, Anderson Ricardo Malmonge Barbosa Luciano, Silvia Regina Cassan Bonome Vanzelli, Fernanda Santos Calo Silva, Talita Fabiana Roque da Silva, Mayra Grava de Moraes
2018 Psychology  
In this context, the objective of the present study was to evaluate the mood of athletes before artistic gymnastics.  ...  We observed that the athletes present characteristics of the iceberg profile in the investigated phase.  ...  Conflicts of Interest The authors declare no conflicts of interest regarding the publication of this paper.  ... 
doi:10.4236/psych.2018.914165 fatcat:rn2xo6kghncmrmj62ev5i377dq

An Algorithm for Multi-way Distance Join Query

Yin Liang, Hong Zhang
2006 2006 IEEE International Conference on Systems, Man and Cybernetics  
Finally, performance and accuracy of K-DJQ algorithm are evaluated in terms of different K value and the number of datasets through experimentation.  ...  This paper presents K-DJQ algorithms for solving multi-way distance join query, which finds the K n-tuples from n spatial datasets that have the smallest distance value according to query graph.  ...  In addition, References [5] and [6] present similarity join and iceberg distance join respectively, which involve two spatial datasets and a given distance threshold.  ... 
doi:10.1109/icsmc.2006.384417 dblp:conf/smc/LiangZ06 fatcat:ozf5k5xykzabtg3ed2232hnl64

Identification of QTLs conferring resistance to downy mildew in legacy cultivars of lettuce

Ivan Simko, Amy J. Atallah, Oswaldo E. Ochoa, Rudie Antonise, Carlos H. Galeano, Maria Jose Truco, Richard W. Michelmore
2013 Scientific Reports  
Cultivars Iceberg and Grand Rapids that were released in the 18 th and 19 th centuries, respectively, have high levels of quantitative resistance to downy mildew.  ...  Alleles conferring elevated resistance at both QTLs originate from cultivar Iceberg.  ...  Experiment a Location Evaluation period No. of replications Evaluation weeks b Rating scale Scores at last evaluation RILs Mean RILs Range Salinas d Grand Rapids Iceberg F-2008  ... 
doi:10.1038/srep02875 pmid:24096732 pmcid:PMC3791445 fatcat:kl4ju7msqvhkrdxw7b5gywtnau

Query Analytics over Probabilistic Databases with Unmerged Duplicates

Ekaterini Ioannou, Minos Garofalakis
2015 IEEE Transactions on Knowledge and Data Engineering  
We propose the entity-join operator that allows expressing complex aggregation and iceberg/topk queries over joins between tables with unmerged duplicates and other database tables.  ...  Our extensive experimental evaluation verifies the benefits of our approach. P(CL m+1 , f i ) P(CL m+1 , f i ) ≥1, and that P(CL m+1 , f i )≥P(CL m+1 , f i ).  ...  We formally define the semantics of queries with entity-join focusing on two analytical query types: aggregation and iceberg/top-k queries. 3.  ... 
doi:10.1109/tkde.2015.2405507 fatcat:e7mm47es6nc3rf577rlcye3uli

Calving giant icebergs: old principles, new applications

J.P. Kenneally, T. Hughes
2006 Antarctic Science  
To advance this interest pioneering work in brittle and ductile fracture mechanics is reviewed, leading to a new application to calving of giant icebergs from Antarctic ice shelves.  ...  Earth-orbiting satellites can now monitor calving of large icebergs from ice shelves bordering the marine West Antarctic Ice Sheet, and recent calving events have stimulated interest in calving mechanisms  ...  The time t meet and distance L meet from the grounding line to the point where the crevasses join are summarized in Table I.  ... 
doi:10.1017/s0954102006000459 fatcat:7vfryh4lgvbcpioe45sneeqify

Genotypes and antimicrobial-resistant phenotypes of Neisseria gonorrhoeae in Portugal (2004-2009)

C. Florindo, R. Pereira, M. Boura, B. Nunes, A. Paulino, J. P. Gomes, M. J. Borrego
2010 Sexually Transmitted Infections  
Conclusions: The heterogeneous STs scenario may represent the "tip of the iceberg", reflecting a high number of undiagnosed and not reported gonorrhoea cases.  ...  The polymorphism degree and the phylogenetic relatedness among NG-MAST STs were evaluated by MEGA4 software on concatenated sequences of por and tbpb alleles.  ...  [15] Subsequently, a Neighboor-Joining phylogenetic tree of all concatenated sequences was generated with MEGA4 software using Kimura two-parameter and p-distance models.  ... 
doi:10.1136/sti.2010.044321 pmid:20940158 fatcat:ynek3vdzyrgj5ps5orlzo6okmi

Hydroacoustic, Meteorologic and Seismic Observations of the 2016 Nansen Ice Shelf Calving Event and Iceberg Formation

R. P. Dziak, W. S. Lee, J. H. Haxel, H. Matsumoto, G. Tepp, T.-K. Lau, L. Roche, S. Yun, C.-K. Lee, J. Lee, S.-T. Yoon
2019 Frontiers in Earth Science  
ACKNOWLEDGMENTS The authors thank the captain and crew of the R/V Araon for their support during staging and deployment of the hydrophone arrays. The authors also thank M.  ...  All of the passive acoustic, seismic and atmospheric data are available from the authors upon request, without undue reservation, to any qualified researcher.  ...  et al., 2008) and hydrophones at distances of 10 1−3 km from the iceberg source (Talandier et al., 2002; Chapp et al., 2005; Royer et al., 2015) .  ... 
doi:10.3389/feart.2019.00183 fatcat:nwvuw44amrd73cjgkjqhxab4ya

SOME ELEMENTS OF ICEBERG TECHNOLOGY [chapter]

W.F. WEEKS, M. MELLOR
1978 Iceberg Utilization  
Iceberg sightings from 1773 to 1960 6 7. Mean distance between icebergs versus distance from the coast of East Antarctica 7 8.  ...  distance.  ... 
doi:10.1016/b978-0-08-022916-4.50015-7 fatcat:3p7256tv7bcdhi7hwdkwb7y3eq
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