Results 11 to 20 of about 1,882,432 (169)

Construction and Field Application of an Indirect Sampling Method (Time-Location Sampling): An Example of Surveys Carried Out on Homeless Persons and Drug Users in France

open access: yesMethodological Innovations, 2010
Since the mid-1990s, Time-Location Sampling methods have been widely used in France in quantitative research about the homeless (Marpsat and Firdion, 2000; Brousse, 2002) and drug users (Emmanuelli et al. 2003; Jauffret-Roustide et al. 2006).
Martine Quaglia, Géraldine Vivier
doaj   +5 more sources

Knowledge of HIV status among men aged 20-35 years in Lusaka, Zambia: Findings from a pilot time location sampling survey in the "Yaba Guy Che" (for the guys) study. [PDF]

open access: yesTrop Med Int Health
AbstractObjectivesWe conducted a pilot time location sampling survey with young men aged 20–35 years in Lusaka, Zambia and aimed to describe knowledge of HIV status and determine factors associated with knowledge of HIV status.MethodsHotspots where men congregate were identified in a densely populated community in Lusaka.
Phiri MM   +10 more
europepmc   +3 more sources

Comparative Evaluation of Bandit-Style Heuristic Policies for Moving Target Detection in a Linear Grid Environment [PDF]

open access: yesSensors
Moving-target detection under strict sensing constraints is a recurring subproblem in surveillance, search-and-rescue, and autonomous robotics. We study a canonical one-dimensional finite grid in which a sensor probes one location per time step with ...
Hyunmin Kang, Minho Ahn, Yongduek Seo
doaj   +2 more sources

Inferring distant-time location in low-sampling-rate trajectories [PDF]

open access: yesProceedings of the 19th ACM SIGKDD international conference on Knowledge discovery and data mining, 2013
With the growth of location-based services and social services, low- sampling-rate trajectories from check-in data or photos with geo- tag information becomes ubiquitous. In general, most detailed mov- ing information in low-sampling-rate trajectories are lost.
Meng-Fen Chiang   +3 more
openaire   +2 more sources

DEVELOPMENT OF A LOCATION-BASED MOBILE APPLICATION FOR SMARTPHONES USING OPEN-SOURCE TECHNOLOGIES [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
Smartphones capable of receiving Global Navigation Satellite Systems (GNSS) signals and location-based mobile applications have been finding new usage areas day by day.
T. Ş. Babaoğlu   +2 more
doaj   +1 more source

Design-based inference in time-location sampling [PDF]

open access: yesBiostatistics, 2015
Time-location sampling (TLS), also called time-space sampling or venue-based sampling is a sampling technique widely used in populations at high risk of infectious diseases. The principle is to reach individuals in places and at times where they gather.
Leon, L   +2 more
openaire   +2 more sources

Approaches to Recruiting ‘Hard-To-Reach’ Populations into Re­search: A Review of the Literature [PDF]

open access: yesHealth Promotion Perspectives, 2011
Background: ‘Hard-to-reach’ is a term used to describe those sub-groups of the populationthat may be difficult to reach or involve in research or public health programmes.
Aziz Sheikh   +2 more
doaj   +1 more source

Monopulse Parameter Estimation for FDA-MIMO Radar under Mainlobe Deception Jamming

open access: yesRemote Sensing, 2023
Multiple input multiple output with frequency diversity array (FDA-MIMO) radar has unique advantages in mainlobe deception jamming suppression and target location.
Hao Chen   +6 more
doaj   +1 more source

Efficient Sample Location Selection for Query Zone in Geo-Social Networks

open access: yesComplexity, 2021
While promoting a business or activity in geo-social networks, the geographical distance between its location and users is critical. Therefore, the problem of Distance-Aware Influence Maximization (DAIM) has been investigated recently.
Kejian Tang   +9 more
doaj   +1 more source

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