Filters








543,159 Hits in 4.7 sec

A digital encoder for field recording of behavioral, temporal, and spatial information in directly computer-accessible form

Clifton Lee Gass
1977 Behavior Research Methods  
Behavioral information is recorded by pressing buttons on a keyboard and spatial information is recorded by touching a magnetic wand to a paper map overlying a matrix of switches.  ...  Digitorg is discussed in relation to the general value of analyzing spatially differentiated behavior sequences.  ...  A digital encoder for field recording of behavioral, temporal, and spatial information in directly computer-accessible form CLIFTON LEE GASS Department ofZoowgy, University ofBritish Columbia, Vancouver  ... 
doi:10.3758/bf03202209 fatcat:tr2zamf5xbhwtcptbdfegkwxbu

A Clifford analytic signal-based breast lesion segmentation method for 4D spatial-temporal DCE-MRI sequences

Liang Wang, Haocheng Shen, Jun Zhang, Yanchun Zhu, Cheng Jiang
2019 IEEE Access  
We propose a new method using a 3D Clifford analytic signal (CAS) approach for breast lesion segmentation of DCE-MRI data.  ...  However, the massive and complex 4D spatial-temporal DCE-MRI data make the diagnosis process lengthy and error-prone.  ...  We further propose a 3D Clifford temporal image (CTI) construction method by applying the CAS to the 4D spatial-temporal DCE-MRI data, which can automatically combine all the temporal information of DCE-MRI  ... 
doi:10.1109/access.2019.2962750 fatcat:oy3ronqwdzca3ec5vlzq647faq

A Review of Recent Spatial Accessibility Studies That Benefitted from Advanced Geospatial Information: Multimodal Transportation and Spatiotemporal Disaggregation

Jinwoo Park, Daniel W. Goldberg
2021 ISPRS International Journal of Geo-Information  
and temporal changes in spatial accessibility.  ...  Therefore, in our review, we investigated methodological advancements in place-based accessibility measures and scrutinized two recent trends in spatial accessibility studies: multimodal spatial accessibility  ...  aspects: multimodal spatial accessibility and temporal changes of spatial accessibility.  ... 
doi:10.3390/ijgi10080532 fatcat:3gfoioxpebgvtmbocetzllo4q4

A cost model for spatio-temporal queries using the TPR-tree

Yong-Jin Choi, Jun-Ki Min, Chin-Wan Chung
2004 Journal of Systems and Software  
A query optimizer requires cost models to calculate the costs of various access plans for a query.  ...  Extensive experimental results show that our proposed method accurately estimates the number of disk accesses over various queries to spatio-temporal data combining reallife spatial data and synthetic  ...  As the Rtree is one of the most popular access methods in spatial databases, the TPR-tree is a popular access method for moving objects in spatio-temporal databases.  ... 
doi:10.1016/s0164-1212(03)00209-7 fatcat:cg6jvud6mfdx3om7gqq3gigijy

A model for optimizing file access patterns using spatio-temporal parallelism

Boonthanome Nouanesengsy, John Patchett, James Ahrens, Andrew Bauer, Aashish Chaudhary, Ross Miller, Berk Geveci, Galen M. Shipman, Dean N. Williams
2013 Proceedings of the 8th International Workshop on Ultrascale Visualization - UltraVis '13  
We employ spatio-temporal parallelism, which combines both spatial and temporal parallelism, to provide greater flexibility to possible file access patterns.  ...  Using our model, we were able to configure the spatio-temporal parallelism to design optimized read access patterns that resulted in a speedup factor of approximately 400 over traditional file access patterns  ...  which obtained far greater I/O performance versus spatial parallelism. Several timing tests showed that the optimized file access patterns resulted in a factor of more than 400 speedup.  ... 
doi:10.1145/2535571.2535593 dblp:conf/sc/NouanesengsyPAB13 fatcat:rzbfscr4bbfhpfg3eojpjfjlp4

Replacement Method based on Access Spatiotemporal Locality in a Heterogeneous Distributed Cluster-based Caching System for WebGIS

Rui Li, Xinxing Wang, Yanping Lin
2015 Open Cybernetics and Systemics Journal  
Community user access of a WebGIS is characterized by intensity and popularity. The requested geospatial data have the characteristics of spatial and temporal locality.  ...  This paper proposed an expression for the replacement feature by balancing spatial and temporal locality as well as long-term and short-term popularity in tile access to ensure that the replacement process  ...  Thus, this paper analyzed and considered the spatial locality and temporal locality of tile access and proposed a way to express the accessed hotspot popularity and its features of spatial-temporal locality  ... 
doi:10.2174/1874110x20150610e010 fatcat:a5j6wjezkngj5na6dfsw5menhu

Spatiotemporal Access Methods [chapter]

Yannis Manolopoulos, Yannis Theodoridis, Vassilis J. Tsotras
2000 Advanced Database Indexing  
Figure 1 gives the evolution of spatio-temporal access methods with the underlying spatial and temporal structures.  ...  Through the last decade, many spatio-temporal access methods are developed.  ...  RT-tree [45] : The RT-tree combines the foundation of the R-tree [14] as a spatial access method and the TSB-tree [24] as a temporal access method.  ... 
doi:10.1007/978-1-4419-8590-3_7 fatcat:2ubplcflmngf5eiwqdthnlzbzm

Organizing Duplicate Spatio-Temporal Data in Location Intelligence

2019 VOLUME-8 ISSUE-10, AUGUST 2019, REGULAR ISSUE  
The amount of this kind of spatio-temporal data is increasing tremendously day by day and becoming difficult to handle, manage and query a big pile of spatio-temporal data.  ...  retrieval of spatio-temporal data related to different areas.  ...  The authors used the crime spatio-temporal dataset for this research work and analyzed the results but it can be used for any other spatio-temporal dataset also.  ... 
doi:10.35940/ijitee.j1080.08810s19 fatcat:ym3gcy23rfdxrgdile4ftsx7zy

Video-based Person Re-identification with Spatial and Temporal Memory Networks [article]

Chanho Eom, Geon Lee, Junghyup Lee, Bumsub Ham
2021 arXiv   pre-print
Based on this, we introduce a novel Spatial and Temporal Memory Networks (STMN).  ...  handling spatial and temporal distractors in person videos.  ...  We instead leverage RNNs to encode a temporal pattern of a sequence for accessing a temporal memory.  ... 
arXiv:2108.09039v1 fatcat:2lhradicajcxbhqto3hyos7gji

Scalable Protection and Access Control in Full Scalable Video Coding [chapter]

Yong Geun Won, Tae Meon Bae, Yong Man Ro
2006 Lecture Notes in Computer Science  
In this paper, we propose an encryption algorithm to protect scalable video coding (SVC) bitstream and a method for conditional access control to consume the encrypted SVC bitstream.  ...  Experiments were performed to verify the proposed method and results showed that proposed algorithms could provide an effective access control of scalable video as well as support a video encryption with  ...  If a user wants to access s spatial layers, t temporal layers, and q SNR layers, a set of the keys is needed to decrypt the encrypted NAL units.  ... 
doi:10.1007/11922841_33 fatcat:6qg4gh77srghtpt2ddl34t55ma

A Composite Index of Public Transit Accessibility

Md Al Mamun, Nicholas Lownes
2011 Journal of Public Transportation  
The paper reviews previous and current methods of measuring accessibility and selects three methods for application in a case study in Meriden, Connecticut.  ...  Finally, this paper proposes weighting factors for individual methods to formulate a composite measure based on individual accessibility component measures.  ...  Therefore, three combinations of accessibility measures (spatial, temporal, and both spatial & temporal) were considered in developing the different schemes.  ... 
doi:10.5038/2375-0901.14.2.4 fatcat:sfntm5brc5fefp77frpf23ugly

Review of Spatiotemporal Data Indexing Structures

K. Venkateswara Rao, Department of CSE, CVR College of Engineering, Ibrahimpatnam, Hyderabad, India, A. Govardhan, K.V. Chalapati Rao, School of Information Technology, JNTUH Hyderabad, India, Department of CSE, CVR College of Engineering, Ibrahimpatnam, Hyderabad, India
2015 CVR Journal of Science & Technology  
This paper provides a comprehensive survey, classification and brief description of spatiotemporal data indexing structures for efficient accessing of the data by various types of spatiotemporal queries  ...  Many indexing structures are available in the literature for accessing such data sets.  ...  RT-tree [1] combines R-tree [3] as spatial access method and Time-Split B-tree (TSB-tree) [1] as a method for temporal access. It indexes entire spatiotemporal data in a single Rtree [3] .  ... 
doi:10.32377/cvrjst0801 fatcat:4ndnq465lbaajfyld4bwbnvd54

An Introduction to the Spatio-Temporal Analysis of Satellite Remote Sensing Data for Geostatisticians [chapter]

A. F. Militino, M. D. Ugarte, U. Pérez-Goya
2018 Handbook of Mathematical Geosciences  
and spatial resolutions.  ...  In this regard, geostatistics, as the spatio-temporal stochastic techniques of geo-referenced data, is a very helpful and powerful tool not enough explored in this area yet.  ...  Specifically, a hierarchical statistical model is presented, including a spatio-temporal random effects (STRE) model as a dynamical component and a temporally independent spatial component for the fine-scale  ... 
doi:10.1007/978-3-319-78999-6_13 fatcat:e3xzehllirc4xj24n7htw4yclm

Moving-Object management method of combat system using main memory DBMS

Jongsu Hwang
2016 Ciencia y Tecnología de Buques  
In this paper, we will introduce the Moving-Object management method of combat systems using the In Moving Object DBMS.  ...  The naval combat management system conducts a comprehensive analysis of obtained information and integrates it with on-board sensors, weapons, and other equipment.  ...  memory, since sequential access to a disk is faster than random access.  ... 
doi:10.25043/19098642.129 fatcat:o6ka5rqdbrgitpcxdbudr7qwjy

Spatiotemporal Graph and Hypergraph Partitioning Models for Sparse Matrix-Vector Multiplication on Many-Core Architectures

Nabil F. T. Abubaker, Kadir Akbudak, Cevdet Aykanat
2018 IEEE Transactions on Parallel and Distributed Systems  
Spatial and temporal hypergraph models in these methods are extended to encapsulate both spatial and temporal localities based on cut/uncut net categorization obtained from vertex partitioning.  ...  These extensions of spatial and temporal hypergraph models encode the spatial locality primarily and the temporal locality secondarily, and vice-versa, respectively.  ...  In Section 5, we propose two new one-phase methods that simultaneously encode spatial and temporal localities in accessing x-vector entries.  ... 
doi:10.1109/tpds.2018.2864729 fatcat:of3sn5tsljdrtcclrhslkzilcq
« Previous Showing results 1 — 15 out of 543,159 results