Using Data Merging Techniques for Generating Multidocument Summarizations

Abstract. Trends in the vertical distribution of ozone are reported and compared for a number of new and recently revised datasets. The amount of ozone-depleting compounds in the stratosphere (as measured by Equivalent Effective Stratospheric Chlorine – EESC) maximised in the second half of the 1990s. We therefore examine the trends in the periods before and after that peak to see if any change in trend is discernible in the ozone record. Prior to 1998, trends in the upper stratosphere (~ 45 km, 4 hPa) are found to be −5 to −10% per decade at mid-latitudes and closer to −5% per decade in the tropics. No trends are found in the mid-stratosphere (28 km, 30 hPa). Negative trends are seen in the lower stratosphere at mid-latitudes in both hemispheres and in the deep tropics. However it is hard to be categorical about the trends in the lower stratosphere for three reasons: (i) there are fewer measurements, (ii) the data quality is poorer, and (iii) the measurements in the 1990s are perturbed by aerosols from the Mt. Pinatubo eruption in 1991. These findings are similar to those reported previously even though the measurements for the two main satellite instruments (SBUV and SAGE II) and the ground-based Umkehr and ozonesonde stations have been revised. There is no sign of a continued negative trend in the upper stratosphere since 1998: instead there is a hint of an average positive trend of ~ 2% per decade in mid-latitudes and ~ 3% per decade in the tropics. The significance of these upward trends is investigated using different assumptions of the independence of the trend estimates found from different datasets. The averaged upward trends are significant if the trends derived from various datasets are assumed to be independent, but are generally not significant if the trends are not independent. This arises because many of the underlying measurement records are used in more than one merged dataset. At this point it is not possible to say which assumption is best. Including an estimate of the drift of the overall ozone observing system decreases the significance of the trends. The significance will become clearer as (i) more years are added to the observational record, (ii) further improvements are made to the historic ozone record (e.g. through algorithm development), and (iii) the data merging techniques are refined, particularly through a more rigorous treatment of uncertainties.

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Periodontal plastic surgery for esthetic crown lengthening by using data merging and a CAD-CAM surgical guide

Journal of Prosthetic Dentistry ◽

10.1016/j.prosdent.2020.09.041 ◽

2020 ◽

Author(s):

Gerardo Mendoza-Azpur ◽

Heydi Cornejo ◽

Milton Villanueva ◽

Renato Alva ◽

André Barbisan de Souza

Keyword(s):

Plastic Surgery ◽

Surgical Guide ◽

Data Merging ◽

Cad Cam ◽

Using Data ◽

Periodontal Plastic Surgery ◽

Crown Lengthening

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Radar Object Detection Using Data Merging, Enhancement and Fusion

10.1145/3460426.3463653 ◽

2021 ◽

Author(s):

Jun Yu ◽

Xinlong Hao ◽

Xinjian Gao ◽

Qiang Sun ◽

Yuyu Liu ◽

...

Keyword(s):

Object Detection ◽

Data Merging ◽

Using Data

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Experimental study of data merging techniques for workspace modeling with uncertainty

Proceedings of the 2005 IEEE International Workshop on Advanced Methods for Uncertainty Estimation in Measurement ◽

10.1109/amuem.2005.1594596 ◽

2005 ◽

Cited By ~ 4

Author(s):

B. Bolzon ◽

F. Payeur

Keyword(s):

Experimental Study ◽

Data Merging ◽

Merging Techniques

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Polar Magnetic Field Reversals of the Sun in Maunder Minimum

International Astronomical Union Colloquium ◽

10.1017/s0252921100064472 ◽

2000 ◽

Vol 179 ◽

pp. 193-196

Author(s):

V. I. Makarov ◽

A. G. Tlatov

Keyword(s):

Magnetic Field ◽

Maunder Minimum ◽

The Sun ◽

Annual Rings ◽

Field Reversal ◽

Polar Magnetic Field ◽

Pine Trees ◽

Using Data ◽

Magnetic Field Reversal

AbstractA possible scenario of polar magnetic field reversal of the Sun during the Maunder Minimum (1645–1715) is discussed using data of magnetic field reversals of the Sun for 1880–1991 and the14Ccontent variations in the bi-annual rings of the pine-trees in 1600–1730 yrs.

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Accent Policy and Accent Modification Enterprises as Potential Indicators of Intercultural Power Relations: A Call for an Updated Research Agenda

Perspectives on Global Issues in Communication Sciences and Related Disorders ◽

10.1044/gics3.1.22 ◽

2013 ◽

Vol 3 (1) ◽

pp. 22-33 ◽

Cited By ~ 1

Author(s):

Brynne D. Ovalle ◽

Rahul Chakraborty

Keyword(s):

International Relations ◽

Identity Construction ◽

Social Theory ◽

Power Relations ◽

Linguistic Diversity ◽

Cultural Organization ◽

Using Data ◽

The Individual ◽

The Impact ◽

The Relationship

This article has two purposes: (a) to examine the relationship between intercultural power relations and the widespread practice of accent discrimination and (b) to underscore the ramifications of accent discrimination both for the individual and for global society as a whole. First, authors review social theory regarding language and group identity construction, and then go on to integrate more current studies linking accent bias to sociocultural variables. Authors discuss three examples of intercultural accent discrimination in order to illustrate how this link manifests itself in the broader context of international relations (i.e., how accent discrimination is generated in situations of unequal power) and, using a review of current research, assess the consequences of accent discrimination for the individual. Finally, the article highlights the impact that linguistic discrimination is having on linguistic diversity globally, partially using data from the United Nations Educational, Scientific and Cultural Organization (UNESCO) and partially by offering a potential context for interpreting the emergence of practices that seek to reduce or modify speaker accents.

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Modeling Self-Determination Theory Motivation Data by Using Unfolding IRT

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000629 ◽

2020 ◽

pp. 1-9

Author(s):

Philipp A. Freund ◽

Annette Lohbeck

Keyword(s):

Ideal Point ◽

Self Determination Theory ◽

Self Determination ◽

Dominance Model ◽

Irt Model ◽

Autonomous Behavior ◽

Location Parameters ◽

Unfolding Models ◽

Using Data ◽

Item Location

Abstract. Self-determination theory (SDT) suggests that the degree of autonomous behavior regulation is a characteristic of distinct motivation types which thus can be ordered on the so-called Autonomy-Control Continuum (ACC). The present study employs an item response theory (IRT) model under the ideal point response/unfolding paradigm in order to model the response process to SDT motivation items in theoretical accordance with the ACC. Using data from two independent student samples (measuring SDT motivation for the academic subjects of Mathematics and German as a native language), it was found that an unfolding model exhibited a relatively better fit compared to a dominance model. The item location parameters under the unfolding paradigm showed clusters of items representing the different regulation types on the ACC to be (almost perfectly) empirically separable, as suggested by SDT. Besides theoretical implications, perspectives for the application of ideal point response/unfolding models in the development of measures for non-cognitive constructs are addressed.

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From Bi-Dimensionality to Uni-Dimensionality in Self-Report Questionnaires

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000583 ◽

2020 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

Bjarne Schmalbach ◽

Markus Zenger ◽

Michalis P. Michaelides ◽

Karin Schermelleh-Engel ◽

Andreas Hinz ◽

...

Keyword(s):

Factor Model ◽

Common Factor ◽

Self Regulation ◽

Model Fit ◽

Self Report ◽

External Criterion ◽

Common Factor Model ◽

Random Intercept ◽

Using Data ◽

Core Self

Abstract. The common factor model – by far the most widely used model for factor analysis – assumes equal item intercepts across respondents. Due to idiosyncratic ways of understanding and answering items of a questionnaire, this assumption is often violated, leading to an underestimation of model fit. Maydeu-Olivares and Coffman (2006) suggested the introduction of a random intercept into the model to address this concern. The present study applies this method to six established instruments (measuring depression, procrastination, optimism, self-esteem, core self-evaluations, and self-regulation) with ambiguous factor structures, using data from representative general population samples. In testing and comparing three alternative factor models (one-factor model, two-factor model, and one-factor model with a random intercept) and analyzing differential correlational patterns with an external criterion, we empirically demonstrate the random intercept model’s merit, and clarify the factor structure for the above-mentioned questionnaires. In sum, we recommend the random intercept model for cases in which acquiescence is suspected to affect response behavior.

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Short Stress State Questionnaire

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000200 ◽

2015 ◽

Vol 31 (1) ◽

pp. 20-30 ◽

Cited By ~ 28

Author(s):

William S. Helton ◽

Katharina Näswall

Keyword(s):

Stress State ◽

Factor Structure ◽

Human Performance ◽

Self Report ◽

Confirmatory Factor ◽

Stress States ◽

Related Stress ◽

Using Data ◽

Task Conditions ◽

Multiple Samples

Conscious appraisals of stress, or stress states, are an important aspect of human performance. This article presents evidence supporting the validity and measurement characteristics of a short multidimensional self-report measure of stress state, the Short Stress State Questionnaire (SSSQ; Helton, 2004 ). The SSSQ measures task engagement, distress, and worry. A confirmatory factor analysis of the SSSQ using data pooled from multiple samples suggests the SSSQ does have a three factor structure and post-task changes are not due to changes in factor structure, but to mean level changes (state changes). In addition, the SSSQ demonstrates sensitivity to task stressors in line with hypotheses. Different task conditions elicited unique patterns of stress state on the three factors of the SSSQ in line with prior predictions. The 24-item SSSQ is a valid measure of stress state which may be useful to researchers interested in conscious appraisals of task-related stress.

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