scholarly journals Simplification and Detection of Outlying Trajectories from Batch and Streaming Data Recorded in Harsh Environments

2019 ◽  
Vol 8 (6) ◽  
pp. 272 ◽  
Author(s):  
Iq Reviessay Pulshashi ◽  
Hyerim Bae ◽  
Hyunsuk Choi ◽  
Seunghwan Mun ◽  
Riska Asriana Sutrisnowati

Analysis of trajectory such as detection of an outlying trajectory can produce inaccurate results due to the existence of noise, an outlying point-locations that can change statistical properties of the trajectory. Some trajectories with noise are repairable by noise filtering or by trajectory-simplification. We herein propose the application of a trajectory-simplification approach in both batch and streaming environments, followed by benchmarking of various outlier-detection algorithms for detection of outlying trajectories from among simplified trajectories. Experimental evaluation in a case study using real-world trajectories from a shipyard in South Korea shows the benefit of the new approach.

2002 ◽  
Vol 16 (2) ◽  
pp. 49-66
Author(s):  
Byung-ok Kil

This inquiry demonstrates that the political legitimacy of a certain society is historically determined, reflects specific institutional and contextual features, and employs a variety of meanings. These meanings can describe both a state of affairs and a process that ultimately involves justifications for legitimate agents and socio-political structures. This paper attepmpts to understand how the meanings of political legitimacy are conceptualized in society. As a case study, it questions: What are the conditions for the existence of political legitimacy and how have they been constructed? How is political legitimacy endorsed in South Korea today, and how does it differ from the past? This paper applies a deconstructive theory of political legitimacy that exploresa a distinctively modern style, or 'art of governance' that has an all-encompassing, as well as individualized effect upon its constituencies. By this approach, this paper argues that the concept of unification does not have a solid significance in the real world, but rather, it is an imaginary idea imposed by the dominant elite class, which is constantly imposed, reinterpreted and transformed in its political context.


2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Szabolcs Duleba ◽  
Sarbast Moslem ◽  
Domokos Esztergár-Kiss

Abstract Method This paper endeavors to introduce a new approach to modal split estimation. In the frame of the research, a customized model of the recently created Best-Worst Method (BWM) is applied to evaluate mode choice alternatives by transport experts. The integrated BWM model is tested on a real-world case study in Budapest, the capital of Hungary, where a small number of selected experts estimate the modal split of three different groups clustered based on the distance of their commuting. Results The results clearly demonstrate the popularity of public transport among all groups, while car is estimated to be used primarily by short- and mid-distance commuters. The coherence of the responses is tested along with sensitivity analysis and rank correlation comparison. Moreover, the final results are compared to the official modal split data of the city. Recommendations Based on the findings, it can be concluded that the application of BWM results in competitive accuracy compared to the mainstream methodologies, moreover BWM needs significantly less cost and time effort during the survey procedure.


2015 ◽  
Vol 25 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Jennifer Tetnowski

Qualitative case study research can be a valuable tool for answering complex, real-world questions. This method is often misunderstood or neglected due to a lack of understanding by researchers and reviewers. This tutorial defines the characteristics of qualitative case study research and its application to a broader understanding of stuttering that cannot be defined through other methodologies. This article will describe ways that data can be collected and analyzed.


2020 ◽  
Vol 40 (6) ◽  
pp. 1403-1428
Author(s):  
Chang-O Kim ◽  
Jongwon Hong ◽  
Mihee Cho ◽  
Eunhee Choi ◽  
Soong-nang Jang

Sign in / Sign up

Export Citation Format

Share Document