National Bureau of Economic Research (NBER)
Amy M. Kilbourne, Paul A. Pirraglia, Zongshan Lai, Mark S. Bauer, Martin P. Charns, Devra Greenwald, Deborah E. Welsh, John F. McCarthy, Elizabeth M. Yano,
... Care Among Patients With Serious Mental Illness: Does Colocation of Services Matter?Amy M. Kilbourne, Ph.D., ... patients from colocated clinics compared with those without colocation were more likely to receive foot exams (OR= ... glycosylated hemoglobin <9% (OR=.69, p<.05).Conclusions:Colocation of medical care was associated with better quality ... compared with usual care. Notably, in two studies, colocation compared with usual care (12,13) was associated ... disorders.However, the extent to which general medical colocation models have been further disseminated beyond the research ...
Tópico(s): Mental Health and Psychiatry
2011 - American Psychiatric Association | Psychiatric Services
Mengjie Zhou, Tinghua Ai, Chao Wu, Yuli Gu, Na Wang,
Colocation mining is one of the major spatial data mining tasks. When discovering colocation patterns, spatial statistics or data mining approaches are commonly used. Colocation mining results are typically presented in a textual ... lack an intuitive approach to obtain cognition of colocation rules. Here, we propose a visualization approach to discover colocation patterns for two independent point distributions and generate ... of the two density surfaces to generate a colocation rule map. The visualization approach can also provide ...
Tópico(s): Data Visualization and Analytics
2018 - Taylor & Francis | International Journal of Geographical Information Science
Lizhen Wang, Pinping Wu, Hongmei Chen,
A spatial colocation pattern is a group of spatial features whose instances are frequently located together in geographic space. Discovering colocations has many useful applications. For example, colocated plant ... protection recommendations. In this paper, we study the colocation mining problem in the context of uncertain data, ... uncertain. One straightforward method to mine the prevalent colocations in a spatially uncertain data set is to ... be associated with the participation index of a colocation. We propose another definition, probabilistic prevalent colocations, trying ...
Tópico(s): Advanced Database Systems and Queries
2011 - IEEE Computer Society | IEEE Transactions on Knowledge and Data Engineering
Jin Soung Yoo, Shashi Shekhar,
Spatial colocations represent the subsets of features which are frequently located together in geographic space. Colocation pattern discovery presents challenges since spatial objects are ... time is devoted to identifying the instances of colocation patterns. We propose a novel joinless approach for efficient colocation pattern mining. The joinless colocation mining algorithm uses an instance-lookup scheme instead ... spatial or an instance join operation for identifying colocation instances. We prove the joinless algorithm is correct ...
Tópico(s): Advanced Database Systems and Queries
2006 - IEEE Computer Society | IEEE Transactions on Knowledge and Data Engineering
Fahui Wang, Yujie Hu, Shuai Wang, Xiaojuan Li,
Most existing point-based colocation methods are global measures (e.g., join count statistic, cross K function, and global colocation quotient). Most recently, a local indicator such as the local colocation quotient has been proposed to capture the variability of colocation across areas. Our research advances this line of ... based statistical test for the local indicator of colocation quotient (LCLQ). The study applies the indicator to ... network. The method is applied to analyze the colocation of three types of crimes and three categories ...
Tópico(s): Land Use and Ecosystem Services
2016 - Routledge | The Professional Geographer
Mengjie Zhou, Tinghua Ai, Zhou Guo-hua, Wenqing Hu,
Colocation mining is useful for understanding the interactions or dependencies that occur among geographic phenomena. Most colocation mining methods are based on planar space. However, ... activities are constrained by a road network. Planar colocation mining methods are not suitable for studying the ... paper, we propose a visualization method to discover colocation patterns constrained by a road network. The method ... major components: network kernel density estimation and network colocation rule map construction. In the colocation rule map ...
Tópico(s): Data Visualization and Analytics
2020 - Institute of Electrical and Electronics Engineers | IEEE Access
Michael Aitken, Douglas J. Cumming, Feng Zhan,
... across 24 stock exchanges around the world. Using colocation services as a proxy for AT and HFT, ... presence of HFT leads to the introduction of colocation services. The data are consistent with the view that HFT pre-dates colocation by at least eight months on most exchanges, ... has strong power in explaining the introduction of colocation services. In effect, our results show that colocation services do not properly measure effective AT and HFT; rather, colocation services are the result of HFT. Exchanges choose ...
Tópico(s): Stock Market Forecasting Methods
2014 - Taylor & Francis | European Journal of Finance
This paper investigates the colocation pattern mining problem for big spatial event data. Colocation patterns refer to subsets of spatial features whose instances are frequently ... high computational cost in generating pattern instances. Existing colocation mining algorithms (e.g., Apriori algorithm, multi-resolution ... insufficient for big spatial event data. Recently, parallel colocation mining algorithms have been developed based on the ... bottleneck of aggregating all instances of the same colocation patterns. Another work proposes a parallel colocation mining ...
Tópico(s): Rough Sets and Fuzzy Logic
2017 - Springer Science+Business Media | Lecture notes in computer science
Huiting Xu, Xi Jin, Fanxin Kong, Qingxu Deng,
... its potential impacts continue expanding with grid modernization. Colocation data centers (simply called colocation) are recognized as a notably promising resource for ... potential in demand management. A major challenge of colocation demand response is the split incentive, that is, colocation operators desire demand response for financial compensation while ... addresses them and specially studies mechanism design for colocation data centers in presence of co-located renewable. ... demand reduction. At each demand response period, the colocation operator solicits bids (amount of energy reduction) from ...
Tópico(s): Green IT and Sustainability
2019 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Sustainable Computing
Narushige Shiode, Shino Shiode, Ryo Inoue,
... suggest that crime hotspots form stable multi-layered colocations and that each area holds its subset: namely, the pervasive, primary colocations consisting of assault , battery and criminal damage to ... vehicle theft , weapons violation ) crimes to comprise secondary colocations, some of which evolving to an even larger, tertiary colocation of hotspots with up to 11 additional crime ... crime-riddled neighbourhoods. This multi-layered structure of colocations as well as the crime colocation diagrams that show the most representative crimes at ...
Tópico(s): Spatial and Panel Data Analysis
2022 - Springer Science+Business Media | GeoJournal
Yan Huang, Shashi Shekhar, Hui Xiong,
Given a collection of Boolean spatial features, the colocation pattern discovery process finds the subsets of features ... data set may reveal symbiotic species. The spatial colocation rule problem is different from the association rule ... We provide a transaction-free approach to mine colocation patterns by using the concept of proximity neighborhood. ... a participation index, is also proposed for spatial colocation patterns. The participation index is used as the measure of prevalence of a colocation for two reasons. First, this measure is closely ...
Tópico(s): Advanced Database Systems and Queries
2004 - IEEE Computer Society | IEEE Transactions on Knowledge and Data Engineering
Zelong Xia, Hao Li, Yuehong Chen, Wenhao Yu,
... locations are important for urban fire safety management. Colocation pattern analysis involving geographic information system (GIS) intends ... facility types based on network distance using two colocation measures: the global colocation quotient (GCLQ) and the local colocation quotient (LCLQ). The global measure helps detect the overall colocation patterns across the entire study area, whereas a ... specific patterns and can capture the variability of colocation patterns across places. For illustration purposes, we use ...
Tópico(s): Evacuation and Crowd Dynamics
2019 - Elsevier BV | Sustainable Cities and Society
Erica L. Richman, Brianna M. Lombardi, Lisa de Saxe Zerden,
... that integrated behavioral health care improves patient outcomes. Colocation, where health and behavioral health providers work in ... key element of integration, but national rates of colocation are unknown. We established national colocation rates and analyzed variation by primary care provider ( ... medium-size practices (11-25 PCPs). Discussion Although colocation is modestly expanding in the United States, it ... which may require greater assistance achieving integration. Increased colocation can improve access to behavioral health care for ...
Tópico(s): Health Policy Implementation Science
2020 - American Psychological Association | Families Systems & Health
K.N Srinivasamurthy, N. S. Gopinath,
... not be overemphasized. In order to achieve safe colocation, avoiding collision risk, it is necessary to evolve ... keeping strategy. In ISRO we have successfully achieved colocation of INSAT-2 satellites for the last few ... Centre addressing strategy selection for INSAT-2 satellites colocation. Combined eccentricity vector and inclination vector separation method ... found to be the best strategy for safe colocation. The strategy has been successfully used to realise colocation operationally for INSAT-2 satellites.
Tópico(s): Planetary Science and Exploration
2002 - Elsevier BV | Acta Astronautica
Benjamin G. Druss, B. J. Mauer,
... as sharing of treatment decision making and the colocation of primary care and mental health specialists, was ... a variety of organizational and structural relationships, including colocation of services, referral approaches, and partnerships between general ... on quality and outcomes of care. Primary care colocation grants Persons with serious mental disorders treated in ... sites are using a variety of strategies, including colocation of services and partnership models to improve primary ... fee to cover care management, care transitions, and colocation of mental health services. Medicare savings beyond an ...
Tópico(s): Healthcare Policy and Management
2010 - American Psychiatric Association | Psychiatric Services
Nguyen H. Tran, Thant Zin Oo, Shaolei Ren, Zhu Han, Eui‐Nam Huh, Choong Seon Hong,
... are very limited attempts on an important segment: colocation datacenters. Unlike large-scale (Google-type) datacenters, the colocation operator lacks control over its tenant servers, which ... propose an incentive mechanism Reward-to-Reduce for colocation's economic demand response, which shows an interaction between the DRP compensation to the colocation operator, and the colocation operator reward to tenants. Observing that this interaction ...
Tópico(s): Auction Theory and Applications
2016 - Institute of Electrical and Electronics Engineers | IEEE Journal on Selected Areas in Communications
Mohammad A. Islam, Hasan Mahmud, Shaolei Ren, Xiaorui Wang,
... out another major segment of data center industry-colocation data centers-much less explored. As a major hindrance to carbon efficiency desired by the operator, colocation suffers from "split incentive": tenants may not be ... at minimizing the carbon footprint of geo-distributed colocation data centers, while ensuring that the operator's ... future information, while being able to satisfy the colocation operator's long-term budget constraint. We demonstrate ... percent without incurring any additional cost for the colocation operator (compared to the no-incentive baseline case), ...
Tópico(s): Smart Grid Energy Management
2017 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Cloud Computing
Yue Han, Xinyan Zhu, Xinyue Ye, Wei Guo,
Most studies of spatial colocation patterns of crime and land-use features in geographical information science and environmental criminology employ global measures, potentially obscuring spatial ... of land-use in Wuhan, China. First, global colocation patterns were examined. Then, local colocation patterns were examined based on the recently-proposed local colocation quotient, followed by a detailed comparison of the ... use features with varying intensity, and the local colocation patterns demonstrated spatial inhomogeneity.
Tópico(s): Land Use and Ecosystem Services
2017 - Multidisciplinary Digital Publishing Institute | ISPRS International Journal of Geo-Information
Jannath Begum Ali, Rhiannon Thomas Jha, Stephanie Mullen Raymond, Andrew J. Bremner,
Two experiments examined perceptual colocation of visual and tactile stimuli in young infants. Experiment 1 compared 4‐ ( n = 15) and 6‐month‐old ( n = 12) ... and noncolocated conditions, demonstrating sensitivity to visual‐tactile colocation on their feet. This extends previous findings of visual‐tactile perceptual colocation on the hands in older infants. Control conditions ... 4‐month‐olds (Experiment 2, n = 12) perceived colocation on the basis of an undifferentiated supramodal coding ... distance between stimuli. Bimodal perception of visual‐tactile colocation is available by 4 months of age, that ...
Tópico(s): Spatial Cognition and Navigation
2020 - Wiley | Child Development
Michael Aitken, Douglas J. Cumming, Feng Zhan,
This paper examines evidence on colocation dates and their impact on market efficiency. International colocation dates can be sourced from a number of avenues including: [1] an ' ... of an exchange. Boehmer et al. (2021) report colocation dates based on [1] and [2] and do not reference prior work that reports colocation dates that are primarily sourced from [3]. The ... and provides evidence of how these differences in colocation dates matter for evidence of their impact on ...
Tópico(s): Corporate Finance and Governance
2023 - Elsevier BV | Journal of Banking & Finance
Haiping Zhang, Xingxing Zhou, Guoan Tang, Xueying Zhang, Qin Jing, Liyang Xiong,
The detection of colocation pattern is an important and widely used method to analyze the spatial associations of geographical objects and events. Existing studies primarily focus on discovering colocation patterns and association rules based on point data. ... information flow, have emerged in recent years. However, colocation patterns and association rules based on flow data ... of their complex structure. This work proposes a colocation pattern detection and spatial association rule discovery approach ...
Tópico(s): Diverse Aspects of Tourism Research
2021 - Wiley | Geographical Analysis
... there has been considerable interest in mining spatial colocation patterns from large spatial datasets. Spatial colocations represent the subsets of spatial events whose instances ... in nearby geographic area. Most studies of spatial colocation mining require the specification of a minimum prevalent ... data. We propose a different framework for spatial colocation pattern mining: finding N-most prevalent colocated event ... developed an algorithm for mining N-most prevalent colocation patterns. Experimental results with real data show that ...
Tópico(s): Advanced Database Systems and Queries
2009 - Springer Science+Business Media | Lecture notes in computer science
Danny Wyatt, Tanzeem Choudhury, Jeff Bilmes, James A. Kitts,
... questions, this article presents new methods for inferring colocation and conversation networks from privacy-sensitive audio. These ... The resulting analysis shows that networks derived from colocation and conversation inferences are quite different. This distinction ... computational social science, especially work that only measures colocation or employs colocation data as a proxy for conversation networks.
Tópico(s): Mental Health Research Topics
2011 - Association for Computing Machinery | ACM Transactions on Intelligent Systems and Technology
Meredith Weiss, Bruce Schwartz,
... a major driver of health care costs. The colocation of psychiatrists in primary care practices has been ... models were developed to determine the sustainability of colocation.We found that the population studied had substantial ... The providers found the experience highly rewarding and colocation was financially sustainable under certain conditions. The colocation model was effective in identifying and treating psychiatric ...
Tópico(s): Primary Care and Health Outcomes
2012 - SAGE Publishing | Journal of Primary Care & Community Health
Ellen K. Cromley, Maureen Wilson-Genderson, Zachary Christman, Rachel Pruchno,
... patterns of successful and unsuccessful aging using the colocation quotient, a measure of spatial association among categories in a population. The colocation quotient assesses the degree to which older adults ... the two dimensions. Global and local patterns of colocation of successful and unsuccessful aging in individuals were ... colocated with the objectively unsuccessful. Spatial analysis of colocation can inform needs assessment for the growing population ...
Tópico(s): Aging and Gerontology Research
2014 - Elsevier BV | Applied Geography
Hai Nguyen, G. B. Osterman, Debra Wunch, C. O’Dell, Lukas Mandrake, P. O. Wennberg, B. Fisher, Rebecca Castaño,
... time with the ground-based measurements, so a colocation methodology is needed to aggregate "nearby" soundings into ... from Total Carbon Column Observing Network (TCCON). Current colocation methodologies for comparing satellite measurements of total column ... longitudinal, and temporal window. We examine a geostatistical colocation methodology that takes a weighted average of satellite ... some comparisons between our methodology and standard existing colocation methods showing that, in general, geostatistical colocation produces ...
Tópico(s): Hydrocarbon exploration and reservoir analysis
2014 - Copernicus Publications | Atmospheric measurement techniques
Robert G. Cromley, Dean M. Hanink, George C. Bentley,
The spatial correlation, or colocation, of two or more variables is a fundamental issue in geographical analysis but has received much less attention than the ... spatial correlation analysis in its development of a colocation statistic for categorical data that is interpreted in ... and other branches of regional analysis. Geographically weighted colocation measures for categorical data are further developed in ... spatial filters: fixed and adaptive. These geographically weighted colocation quotients are applied to the spatial distribution of ...
Tópico(s): Economic and Environmental Valuation
2013 - Routledge | The Professional Geographer
... this study looked into the spatial relationships and colocation patterns among different types of crime across the ... to colocate with each other and where the colocations exist in the county. More than thirty types ... for census block groups, which helps reveal spatial colocation patterns of crimes in Jefferson County. Temporal changing in crime colocation patterns from 2009 to 2011 was also examined ...
Tópico(s): American History and Culture
2015 - Taylor & Francis | Papers in Applied Geography
Nguyen H. Tran, T. Cuong, Shaolei Ren, Zhu Han, Choong Seon Hong,
... omitting another critical segment of datacenter business: multitenant colocation. In colocation datacenters, while there exist multiple tenants who manage their own servers, the colocation operator only provides facilities such as cooling, reliable power, and network connectivity. Therefore, colocation has a unique feature that challenges any attempts ...
Tópico(s): Green IT and Sustainability
2015 - Institute of Electrical and Electronics Engineers | IEEE Journal on Selected Areas in Communications