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About 10,000 papers for “Capture effect”

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????????? · The Royal Society of Chemistry’s Journals, Books and Databases (The Royal Society of Chemistry) · 2010

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Cited by 0

Effect of plant-capture in a capture-recapture experiment

Paul S. F. Yip · Communication in Statistics- Theory and Methods · 1996

An efficiency study is made of a plant-capture approach for estimating population size in recapture studies. The population is augmented by the insertion of a known number of planted individuals who have already been marked and whose behaviour is identical to that of other members. A comparison is made with the case where no plants are used by considering asymptotic efficiency and a simulation study.

Cited by 10

Effect of the capture medium.

Olivier F. Laczka (643484), Maurizio Labbate (355121), Justin R. Seymour (204024) et al. · Figshare · 2015

<p>Signals obtained for increasing <i>Vibrio parahaemolyticus</i> (dashed line) or <i>S. marcescens</i> (solid line) cell concentrations when carrying out the capture step either in PBS (▪), filtered (▴) or unfiltered (•) natural seawater.</p>

Cited by 0Open access

The Capture Effect: How Media Capture Affects Journalists, Markets and Audiences

Marius Dragomir · Central European Journal of Communication · 2024

As the literature aimed at defining and explaining media capture has grown in recent years so has the interest in documenting the impact of capture in greater depth. There is still a relatively wide gap between the literature focused on defining and describing the concept, which is rich and increasingly sophisticated, and the body of research aimed at measuring the impact of capture, which now consists of a collection of disparate analytical papers primarily focused on case studies. This paper aims to contribute to this second body of knowledge: building on existing research, it looks to identify the changes that media capture leads to in three key areas: journalism (with a focus on the impact of capture on professional standards and the performance of journalists), market (with a focus on the effects of capture on free competition, market health and viability of investments), and audience (analysing the content limitations that audiences are faced with in environments where propaganda media is dominant).

Cited by 11Open access

A global effect of capture saccades

Stigchel, S. van der, Vries, J.P., Bethlehem, R. et al. · Digital Academic REpository of VU University Amsterdam (Vrije Universiteit Amsterdam) · 2011

Cited by 0

The Capture Effect in FM Receivers

K. Leentvaar, James A. Flint · IRE Transactions on Communications Systems · 1976

In this paper a theoretical explanation of the capture effect is given by calculating the instantaneous frequency of the output signal of a limiter when two frequency modulated (FM) signals are present at the limiter input. When this signal is applied to a demodulator with unlimited bandwidth, the output signal of the demodulator proves to have an extreme capture effect. When however the demodulator bandwidth is limited, the capture effect is shown not be be extreme. This phenomenon is explained and possibilities are given to minimize the capture effect. Some of the results of measurements on limiters and demodulators are given in this paper; they prove that a weak capture effect can be obtained. A method of calculating the degree of capturing is included.

Cited by 149

Effect of Epithermal Capture on η

Cohen, E. Richard, 1922- · University of North Texas Digital Library (University of North Texas) · 1952

The purpose of this report is to investigate the effect of neutrons being captured before they are completely slowed down and have the chance to leak out and thus correspondingly increase the multiplication factor of the lattice.

Cited by 0Open access

Motion capture and the ‘Ouchi’ effect

Trevor J. Hine, Michael Cook, Johannes M. Zanker · Australian and New Zealand Journal of Ophthalmology · 1998

These parameters coincide with those of the 'Ouchi' effect, suggesting a sharing of the same causal mechanism.

Cited by 0

A global effect of capture saccades

Stefan Van der Stigchel, Jelmer P. de Vries, Richard A. I. Bethlehem et al. · Experimental Brain Research · 2011

When two target elements are presented in close proximity, the endpoint of a saccade is generally positioned at an intermediate location ('global effect'). Here, we investigated whether the global effect also occurs for eye movements executed to distracting elements. To this end, we adapted the oculomotor capture paradigm such that on a subset of trials, two distractors were presented. When the two distractors were closely aligned, erroneous eye movements were initiated to a location in between the two distractors. Even though to a lesser extent, this effect was also present when the two distractors were presented further apart. In a second experiment, we investigated the global effect for eye movements in the presence of two targets. A strong global effect was observed when two targets were presented closely aligned, while this effect was absent when the targets were further apart. This study shows that there is a global effect when saccades are captured by distractors. This 'capture global' effect is different from the traditional global effect that occurs when two targets are presented because the global effect of capture saccades also occurs for remote elements. The spatial dynamics of this global effect will be explained in terms of the population coding theory.

Cited by 21Open access

Motion capture and motion after-effect

Benjamin M. Friedrich, Pascal Mamassian · Journal of Vision · 2004

The position of a motion field can be misperceived in its direction of motion (Ramachandran & Anstis, 1990, Perception, 19: 611–616; De Valois & De Valois, 1991, Vision Research, 31: 1619–1626). Targets flashed in the vicinity are also mislocalized (Whitney & Cavanagh, 2000, Nature Neuroscience, 3: 954–959), an effect called motion capture. In this study, we measured motion capture at different locations around the motion field. Our method involved double-flashing the very same target, once during the motion and a second time immediately after the motion has stopped. If targets are affected by motion, then the first target should appear shifted in the direction of motion while the second target should be perceptually shifted in the opposite direction. The magnitude of the motion captures can therefore be measured by comparing the perceived position of the two targets' appearances. A first experiment tested the front and the back regions of the motion field. Most observers showed the expected difference between the perceived locations of the first and second appearence of the target. Furthermore the magnitude of the shift was usually different between the front and back regions. With our experiment we can measure motion capture at various locations around the motion field. Our results indicate that motion seems to induce different captures at different locations around the motion field, which might be due to attentional shifts induced by motion. Implications of these results for a general model of motion capture will be discussed.

Cited by 0Open access

T-noninvariant effect in muon capture

1997

The T-noninvariant transverse polarization of neutrons is considered for muon capture by a 6 Li nucleus with decay into a quasistationary 2 + state of the three particle α + n + n continuum. This polarization is orthogonal to the plane spanned by the polarization axis of the initial mesic atom and the neutron momentum. The situation in which neutrons that are emitted in the plane orthogonal to the axis of the mesic-atom polarization and which have oppositely directed momenta equal in magnitude are selected is analyzed. The wave function of the final state is constructed by using the method of hyperspherical harmonics. In the approximation of the allowed Gamow-Teller transition 1 + → 2 +, this neutron polarization is expressed in terms of the T-noninvariant relative phase of reduced matrix elements for transitions from the 6 Li ground state to various final-state configurations. 1

Cited by 0

Leveraging the capture effect for indoor localization.

Anass Drif · Research Repository (Delft University of Technology) · 2015

This Msc. Thesis builds upon a work-in progress called collocal which researched room-level indoor-localization. Localization is the action of estimating the position of a certain entity on a map. For example tracking the postion of furniture and other inventory in a building over a long period of time. To localize these entities other static nodes are employed that know their own location. These static nodes, called anchors, beacon their coordinates periodically. Mobile nodes are the entities that try to estimate their position based on these beacon messages. In conventional systems this beaconing is done asynchronously. System designers employ complex schemes to prevent anchor nodes from beaconing at the same time to avoid interference. These systems consume lots of energy at the mobile node, because they have to keep their radio on for a longer time. A deployment of such a localization system is expected to last for a long term period without replacing batteries of the used device. Counterintuitive to what asynchronous system designers do, in collocal the anchor nodes beacon at the same time on purpose. Collocal reduces the energy consumption considerably by shortening the listening interval at the mobile node. Collocal however suffers from two major drawbacks: a dead zone area (an area where you can not be localized) between anchor nodes and a very high bit-error rate. In this Msc. thesis the two problems are solved with the use of orthogonal codes. I was able to improve the battery lifetime of the mobile node from 3 months in the asynchronous case to 2 years using a localization period of 1 second. The proposed method is evaluated against five state-of-the-art localization algorithms.

Cited by 2Open access

Exploiting the capture effect opportunistically in MANETs

Hui Xu, J.J. Garcia‐Luna‐Aceves, R. Sadjadpour Hamid · 2010

Channel fading has been regarded as a negative factor for successful packet transmission. However, with deep fading, although collisions for a given transmission may exist, the capture effect can allow the transmission to succeed as long as the channel for the transmitted signal is strong enough and is weak enough for the interference signals. Accordingly, we propose an asynchronous medium access control (MAC) scheme that selects a packet with the highest success probability to be transmitted. We call this approach opportunistic interference management (OIM). The basic mechanism in OIM consists of probing the channel conditions for multiple neighbors concurrently, and then selecting to transmit those packets corresponding to the winners of the probing phase. OIM improves the probability of successful transmission and increases network throughput without adding extra delays for inter-nodal handshakes. Mathematical analysis and simulations are used to validate the advantages of OIM over the traditional packet-transmission scheme used in MAC protocols today.

Cited by 4

Invisible causal capture in the tunnel effect

Gi‐Yeul Bae, Jonathan Flombaum · Journal of Vision · 2010

Beyond identifying individual objects in the world, the visual system must also characterize the relationships between objects, for instance when objects occlude one another, or when they cause one another to move. Here we explored the relationship between perceived causality and occlusion. Can causality be perceived behind an occluder? Participants watched a series of events and simply had to judge whether a centrally presented event involved a single object passing behind an occluder, or one object causally launching another. With no additional context, the centrally presented event was always judged as a pass, even when the occluded and disoccluding objects were different colors —an illusion known as the ‘tunnel effect’ that results from spatiotemporal continuity. However, when a nearby context event involved an unambiguous causal launch synchronized with the occlusion event, participants perceived a causal launch behind the occluder. In other words, participants experienced invisible causal capture, perceiving a casual relationship in an occluded location. Crucially, when the context event involved two distinct objects, but no causal relationship between them, no casual launch was perceived behind the occluder. Thus invisible causal capture did not depend merely on the suggestion that two objects might exist behind the occluder, but instead on the causal nature of the context. Perhaps most surprisingly, invisible causal capture was perceived even when the two disks in the central occlusion event shared the same color. Thus spatiotemporal synchrony trumped featural similarity in the interpretation of the hidden event. Related context events illustrate that invisible causal capture depends upon grouping by common motion. Taken together, these results emphasize the inherent ambiguity that the visual system faces while inferring the relationships between objects.

Cited by 0Open access