Frame Matching Research Articles

The Influences of Optimal Matching and Social Capital on Communicating Support

The optimal matching and social capital perspectives frame present research expectations and interpretations of the network, esteem, informational, and emotional support communication of 3 computer-mediated communication social support groups, each having a different health-promoting purpose. Past research has shown differences in the support communication provided by different groups but has offered little explanation for these differences. The present study uses a comparative analysis of optimal matching and social capital influences to compare and analyze differences in the support communication provided by Alcoholics Anonymous, cancer caregivers, and transgender identity support groups. Results show different patterns of support communication enacted in each. These results provide support for optimal matching and social capital predictions, indicating that the life stressor and group structure affect the social support provided. However, results also demonstrate a need for greater refinement in interpreting the effects of these influences. Each group communicates network, esteem, informational, and emotional support somewhat differently in response to the life stressor and in enacting bridging and bonding social capital. The present comparisons provide a fuller analysis of the optimal matching and social capital influences upon the support communicated in groups than afforded by past research studies and suggests research opportunities for future research.

Frame matching and ΔPTED: a framework for teaching Swing and Blues dance partner connection

Frame Matching is a codified theory of partner-dance connection. It establishes a framework for breaking down and teaching Swing and Blues dance connection. It is the act of creating, maintaining, or changing tension between partners with posture and tone, in order to lead and follow energy and direction. Frame Matching is explained in terms of changes in posture, tone, tension, energy, and the direction of energy (∆PTED).

Flow Structures in the Tip Region for a Transonic Compressor Rotor

Numerical simulations are carried out to investigate flow structures in the tip region for an axial transonic rotor, with careful comparisons with the experimental results. The calculated performance curve and two-dimensional (2D) flow structures observed at casing, such as the shock wave, the expansion wave around the leading edge, and the tip leakage flow at peak efficiency and near-stall points, are all captured by simulation results, which agree with the experimental data well. An in-depth analysis of three-dimensional flow structures reveals three features: (1) there exists an interface between the incoming main flow and the tip leakage flow, (2) in this rotor the tip leakage flows along the blade chord can be divided into at least two parts according to the blade loading distribution, and (3) each part plays a different role on the stall inception mechanism in the leakage flow dominated region. A model of three-dimensional flow structures of tip leakage flow is thus proposed accordingly. In the second half of this paper, the unsteady features of the tip leakage flows, which emerge at the operating points close to stall, are presented and validated with experiment observations. The numerical results in the rotor relative reference frame are first converted to the casing absolute reference frame before compared with the measurements in experiments. It is found that the main frequency components of simulation at absolute reference frame match well with those measured in the experiments. The mechanism of the unsteadiness and its significance to stability enhancement design are then discussed based on the details of the flow field obtained through numerical simulations.

Traffic-induced vibrations of frame structures

Using the spectral element method (SEM), a 2-D numerical model of multi-storey frame structures has been developed. The model has been used to predict traffic-induced vibrations of two, six, and twelve-story concrete buildings measured along the route of a future metro line in Belgrade, the capital of Serbia. Vibration simulations of the six-storey frame match satisfactorily the measured dynamic response. However, there is a difference between numerical simulation and the actual measurements for the two-storey and twelve-story buildings. The results indicate a great potential of the proposed SEM to simulate ground-induced vibrations of frame buildings. However, more complex structural models should be developed to better replicate actual situations.

Relations Between Parental Affect and Parenting Behaviors: A Meta-Analytic Review

SYNOPSIS Objective. The goal of the present investigation was to provide a meta-analytic review of the research on affect and parenting in nonclinical samples. Design. The authors conducted analyses on the overall mean effect size for 63 studies (k = 18,211). Affect was coded as either positive or negative, and parenting behavior was coded as either supportive-positive or harsh-negative. Moderators included definition of affect, time frame of measurement, reporter, child age, and parent gender. Results. The authors' analyses support the association between parental affect and parenting behavior, and this relation was consistent across types of affect and parenting, as well as gender of parent. Significant methodological moderators of these relations include time frame match and reporter match. Child age moderated the relation between negative affect and supportive-positive parenting, but not harsh-negative parenting. Last, both negative and positive affect showed specificity in their association with parenting behavior. Conclusion. Parental affect appears to be a reliable correlate of parenting behaviors in the general population. In addition, consistent with theory (T. Dix, 1991), negative affect was more strongly related to hostile parenting, and positive affect was more strongly related to supportive parenting. Methodological factors, such as time frame of measurement and reporter, as well as demographic variables, should be carefully considered in the design and interpretation of future studies of parental affect and parenting behaviors.

A Robust Monocular Visual Odometry Algorithm for Autonomous Robot Application

The paper proposes a methodology for reducing the effects of noise in the sequential trajectory reconstruction process based on a monocamera video stream. The recovery of the robot odometry is based on a features tracking technique. In the proposed approach, the estimation of the of ego-motion is improved by exploiting the information extracted from a dynamic window that memorizes the last frames seen by the camera. At each step, the Fundamental Matrix is recovered by selecting, from the dynamic window, the best matching frames ranked according a specific index of performance that is the condition number of the LS problem associated to the Fundamental Matrix computation. The performance of the proposed strategy are analyzed in presence of image quantization noise and in presence of inaccuracy in the feature point matching.

Efficient Advertisement Discovery for Audio Podcast Content Using Candidate Segmentation

Nowadays, audio podcasting has been widely used by many online sites such as newspapers, web portals, journals, and so forth, to deliver audio content to users through download or subscription. Within 1 to 30 minutes long of one podcast story, it is often that multiple audio advertisements (ads) are inserted into and repeated, with each of a length of 5 to 30 seconds, at different locations. Automatic detection of these attached ads is a challenging task due to the complexity of the search algorithms. Based on the knowledge of typical structures of podcast contents, this paper proposes a novel efficient advertisement discovery approach for large audio podcasting collections. The proposed approach offers a significant improvement on search speed with sufficient accuracy. The key to the acceleration comes from the advantages of candidate segmentation and sampling technique introduced to reduce both search areas and number of matching frames. The approach has been tested over a variety of podcast contents collected from MIT Technology Review, Scientific American, and Singapore Podcast websites. Experimental results show that the proposed algorithm archives detection rate of 97.5% with a significant computation saving as compared to existing state-of-the-art methods.

Optimized frame selection algorithm for video stitching based on feature points

This paper presented an optimized algorithm of frame selection on the stitching of videos with overlapped visions. Firstly,it compared the Scale Invariant Feature Transform (SIFT) value differences of all the match points of standard frame and candidacy frames,and then selected the point pairs with minimal SIFT value difference,and calculated the mean values of these differences. Finally,the frame with the minimum mean value was selected as the best frame,and stitched with the standard frame. This algorithm assures the best matching frame and can be used to choose the best stitching frame automatically in video stitching. Simulation shows the effectiveness of this algorithm.

Politics, Transgression, and Representation at the Court of Charles II

The essays in this interdisciplinary volume derive from papers presented at conferences associated with the Painted Ladies exhibition held at the National Portrait Gallery (2001) and the Yale Centre for British Art (2002). Central to that exhibition was Peter Lely's series of ‘Windsor Beauties’. The term ‘series’ can be deceptive, however, as Julia Marciari Alexander and Catherine MacLeod demonstrate in their essay which contextualises Lely's ‘Beauties’ with those series assembled almost contemporaneously by the Comte de Bussy and by Cardinal Flavio Chigi. While the matching frames of the ‘Windsor’ portraits may have deceived the viewer into thinking that they were all part of a single commissioned series, ‘the disparate nature of the appearance and dates of the portraits’ suggests otherwise. Lely's ‘series’ appears to have been assembled through different forms of acquisition: ‘commissions, gifts from the sitters … and purchases from … studio stock’ (p. 103). Importantly, the editors also show that groups of contemporary female portraits were collected by ‘lesser’ court figures such as Baptist May, who emulated more illustrious collectors by assembling pictures of, among others, Louise de Kéroualle, Mary Davis, and Nell Gwyn.

相邻帧间匹配的迎头点目标跟踪算法

相邻帧间匹配的迎头点目标跟踪算法

Shot Change Detection via Local Keypoint Matching

Shot change detection is an essential step in video content analysis. However, automatic shot change detection often suffers from high false detection rates due to camera or object movements. To solve this problem, we propose an approach based on local keypoint matching of video frames. This approach aims to detect both abrupt and gradual transitions between shots without modeling different kinds of transitions. Our experiment results show that the proposed algorithm is effective for most kinds of shot changes.

Reproducibility of intravascular ultrasound virtual histology analysis

Intravascular ultrasound with virtual histology analysis (IVUS-VH) is a novel technology which allows for the identification of discrete atherosclerotic plaque components using radiofrequency backscatter data. Whether the composition of these plaques can be monitored accurately in a longitudinal fashion remains unclear. We sought to evaluate the reproducibility of plaque composition measurements as determined by IVUS-VH in a clinical setting. Sixteen consecutive patients who underwent percutaneous coronary intervention were included in this study. Prior to and then again following intervention, IVUS images with VH processing were obtained with motorized pullback. Up to 4 frames were selected for analysis for each patient, with a total of 24 IVUS frames used. An IVUS frame was chosen with visible angiographic and ultrasound landmarks. The matching frame on the second pullback was identified using these landmarks. For each frame, vessel and lumen area as well as plaque composition by VH were determined. There was a high level of agreement between the two pullback measurements for lumen area, vessel area, and plaque burden (the Spearman rank-order correlation coefficients were 0.96, 0.96, and 0.95, respectively). Similarly, for plaque components by VH, the coefficients ranged from .90 to .97 and 0.84 to 0.92 for segmental volumetric analysis. The Bland-Altman plots indicated proportional error for the differences of the four measurements between the two pullback trials and were associated with high coefficients of reproducibility. Discrete measurements of plaque compositional area and volume in the clinical setting appear to have reproducibility comparable to that of traditional IVUS measurements.

A Global Approach for Video Matching

This paper presents a new framework for spatiotemporal alignment of two video sequences. It proposes Intra-video and inter-video matching strategy for spatial alignment; modifies Dynamic Time Warping for temporal alignment. Intra-video matching tracks feature points and binds them together. Contextual inter-video matching uses track correspondences to provide initial feature correspondences for inter-video frame matching and updates track correspondences using frame-matching results. The proposed matching strategy makes best use of coherency of source videos and improves coherency of aligned video, stability and efficiency of alignment. The Modified Dynamic Time Warping establishes frame correspondences by minimizing global differences between them, keeps temporal order of frames, and handles nonlinear misalignment of videos. The proposed method can successfully align videos viewing different events recorded by independently moving cameras. Experimental results and comparison show that great improvements on stability and efficiency of video matching together with coherency of

The separation rate cannot be exogenous

Many articles that used the matching frame model considered the separation rate as an exogenous variable and concentrated on the matching process. This assumption is inconsistent with the findings of many empirical studies, which indicate that business cycles are driven primarily by changes in the separation rate. This study demonstrates that, within the matching frame model, given uncertain productivity of newly employed workers the separation rate cannot be constant. Any change in the asset value of occupied jobs will lead to a change of the separation rate.

Spatiotemporal sequence matching for efficient video copy detection

This paper proposes a novel sequence matching technique to detect copies of a video clip. If a video copy detection technique is to be effective, it needs to be robust to the many digitization and encoding processes that give rise to several distortions, including changes in brightness, color, frame format, as well as different blocky artifacts. Most of the video copy detection algorithms proposed so far focus mostly on coping with signal distortions introduced by different encoding parameters; however, these algorithms do not cope well with display format conversions. We propose a copy-detection scheme that is robust to the above-mentioned distortions and is also robust to display format conversions. To this end, each image frame is partitioned into 2 /spl times/ 2 by intensity averaging, and the partitioned values are stored for indexing and matching. Our spatiotemporal approach combines spatial matching of ordinal signatures obtained from the partitions of each frame and temporal matching of temporal signatures from the temporal trails of the partitions. The proposed method has been extensively tested and the results show the proposed scheme is effective in detecting copies which have been subjected to wide range of modifications.

Video watermarking synchronization based on profile statistics

A novel temporal synchronization method for video watermarking by matching the profile statistics. The profile statistics, represented by the characteristic parameters such as position mean and variance in the x-and y-directions, of a frame in a video sequence can easily be calculated and sent as side information to the receiver. At the receiving end, temporal attacks such as transposition, dropping, and insertion can be detected by comparing side information and characteristic parameters calculated from the received video. The simulation results show that the proposed method can successfully re-synchronize the attacked video back to the original format with accuracy from 72.41% to 98.15% for various video sequences based on single frame matching. After the voting process, the GOP detection accuracy can be improved to the range of from 96.30% to 100%.

Sealing Science

This article reviews an edge-seal gasket that begins its final manufacturing stage stacked together with about a hundred identical paper frames. Each die-cut frame matches, edge for edge and hole for hole, the parts between which it will form a sealing interface. Midway between bolts marks is one of the best places to test gasket performance because that is where bolts in assembly exert the least amount of clamping force. Any gasket leakage is likely to begin where the clamping force is lowest. Thermal cycling and the expansion rates of dissimilar metals are particularly stressful to gaskets in engine service. The thermal tests try to do to the gaskets what engines can do routinely: displace the gasket as the adjoining engine components expand and contract. But with high tack properties, the edge polymer grabs tenaciously to each surface and holds on even as the two components move at different rates.

Functional Expression of a Multisubstrate Deoxyribonucleoside Kinase from Drosophila melanogaster and Its C-terminal Deletion Mutants

The occurrence of a deoxyribonucleoside kinase in Drosophila melanogaster (Dm-dNK) with remarkably broad substrate specificity has recently been indicated (Munch-Petersen, B., Piskur, J., and Søndergaard, L. (1998) J. Biol. Chem. 273, 3926-3931). To prove that the capacity to phosphorylate all four deoxyribonucleosides is in fact associated to one polypeptide chain, partially sequenced cDNA clones, originating from the Berkeley Drosophila genome sequencing project, were searched for homology with human deoxyribonucleoside kinases. The total sequence of one cDNA clone and the corresponding genomic DNA was determined and expressed in Escherichia coli as a glutathione S-transferase fusion protein. The purified and thrombin cleaved recombinant protein phosphorylated the four deoxyribonucleosides with high turnover and K(m) values similar to those of the native Dm-dNK, as well as the four ribonucleosides and many therapeutical nucleoside analogs. Dm-dNK has apparently the same origin as the mammalian kinases, thymidine kinase 2, deoxycytidine kinase, deoxyguanosine kinase, and the herpes viral thymidine kinases, but it has a unique C terminus that seems to be important for catalytic activity and specificity. The C-terminal 20 amino acids were dispensable for phosphorylation of deoxyribonucleosides but necessary for full activity with purine ribonucleosides. Removal of the C-terminal 20 amino acids increased the specific activity 2-fold, but 99% of the activity was lost after removal of the C-terminal 30 amino acids.

Wavelet representations for monitoring changes in teeth imaged with digital imaging fiber-optic transillumination.

Digital imaging fiber-optic transillumination (DI-FOTI) is a novel method to detect and monitor dental caries, using light, a charge-coupled device (CCD) camera, and computer-controlled image acquisition. The advantages of DIFOTI over radiography include: no ionizing radiation, no film, real-time diagnosis, and higher sensitivity in detection of early lesions not apparent to X-ray, as demonstrated in vitro. Here, we present a method of processing DIFOTI images, acquired at different times, for monitoring changes. Of central importance to this application is pattern matching of image frames that is invariant to translation and rotation of a tooth, relative to the field of view of the imaging camera, and that is robust to changes in illumination source intensity. Our method employs: 1) wavelet modulus maxima representations for segmentation of teeth images; 2) first and second moments of gray level representations of DIFOTI images in the spatial domain, to estimate tooth location and orientation; and 3) multiresolution wavelet magnitude representations for quantitative monitoring. Even with illumination source intensity variation, it is demonstrated in vitro that such wavelet representations can facilitate detection of simulated clinical changes in light transmission that cannot be detected in the spatial domain.

1.15 Mbit/s coding of video signals including global motion compensation

A coder for television video signals working at a bit-rate of 1.15 Mbit/s is presented. It uses a special coding structure facilitating trick modes and a separated global and local motion compensation. Global motion is described by a central zoom and pan model. For the estimation of global motion a frame matching algorithm is explained. The advantages of using global motion parameters are given by the reduction of the amount of coded motion information as well as the reduction of regions to be replenished in the predicted pictures. Experimental results show that for the given bit-rate of 1.15 Mbit/s the quantization step size for prediction error coding can be reduced by the factor three in case of existing global motion. Also at the decoder side global motion parameters are used for a synthesis of omitted frames resulting in a higher resolution in time for global motions.