A novel hierarchical coding algorithm based on multi-subsample and the all phase IDCT interpolation

2004 ◽  
Author(s):  
Zhengxin Hou ◽  
Xujing Guo ◽  
Xi Yang
Keyword(s):  
Hierarchical Coding

Analyzing the effects of incivility beyond workplaces

2020 ◽  
Vol 28 (5) ◽  
pp. 1069-1093 ◽  
Author(s):  
Anselmo Ferreira Vasconcelos
Keyword(s):  
Social Constructivism ◽  
Police Officers ◽  
Public Management ◽  
Complex Dynamics ◽  
Content Type ◽  
Hierarchical Coding ◽  
Public Managers ◽  
Template Analysis ◽  
Negative Impacts ◽  
Practical Implications

Purpose The purpose of this paper is to peruse a strike enacted by the police force (PF) from a southeast state of Brazil and its consequences to the population through the lens of workplace incivility (WI) theory. Design/methodology/approach This study draws on a qualitative research design and social constructivism paradigm. In addition, it uses the template analysis, a peculiar form of thematic analysis, which is grounded on the hierarchical coding. Accordingly, it allows the researcher to yield a broad structure (obviously through the task of analyzing textual data, i.e. published texts) as well as providing enough flexibility to comply with the needs of a study. Findings Overall, there was a slightly shift between the initial template and the second one. Rather, the initial thematic assumptions were largely confirmed, namely, antecedents, strike strategy, reactions and consequences; yet, findings also showed other theme, i.e. mitigating decisions. The template analysis used here turned to be a consistent path given that it allowed finding a range of categories related to the themes, which substantiated the results. On the other hand, this investigation shows that even society, as a whole, may be seriously affected by WI. Research limitations/implications This investigation has some limitations regarding that it is a qualitative endeavor. Therefore, the outcomes cannot be generalized, and it constitutes the chief limitation of this study. Practical implications In terms of practical implications, findings suggest that public managers, mayors and governors must pay strong attention to the task of motivating their workforce. Robust human resource policies and fair salary may avoid job dissatisfaction. Social implications Data also indicated that incivility may be related to complex dynamics whose negative impacts may go beyond the workplaces. Originality/value This study expands the theory of WI by paying attention to a generally neglected group (police officers). In addition, it focuses on an emergent economy, which is at odds with robust problems of finance and public management nature. In doing so, it provides evidence of other consequences of WI. Broadly speaking, citizens and businesses are consumers of public services, including safety. Finally, it suggests that WI may be associated with two instigators simultaneously. In this case, it was intertwined with governor’s weak human resources policies and the civil servants’ irresponsibility.

Hierarchical Coding of DTV and HDTV for Satellite Transmission

1994 ◽  
pp. 665-672
Author(s):  
Jae Gon Kim ◽  
Jae Yeal Nam ◽  
Young Sun Lee ◽  
Chieteuk Ahn
Keyword(s):  
Hierarchical Coding ◽  
Satellite Transmission

scholarly journals A Novel Hierarchical Coding Progressive Transmission Method for WMSN Wildlife Images

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 946 ◽  
Author(s):  
Wenzhao Feng ◽  
Chunhe Hu ◽  
Yuan Wang ◽  
Junguo Zhang ◽  
Hao Yan
Keyword(s):  
Signal To Noise Ratio ◽  
Similarity Index ◽  
Structural Similarity ◽  
Transmission Efficiency ◽  
Signal Interference ◽  
Progressive Transmission ◽  
Wireless Multimedia ◽  
Transmission Method ◽  
Hierarchical Coding ◽  
Object Region

In the wild, wireless multimedia sensor network (WMSN) communication has limited bandwidth and the transmission of wildlife monitoring images always suffers signal interference, which is time-consuming, or sometimes even causes failure. Generally, only part of each wildlife image is valuable, therefore, if we could transmit the images according to the importance of the content, the above issues can be avoided. Inspired by the progressive transmission strategy, we propose a hierarchical coding progressive transmission method in this paper, which can transmit the saliency object region (i.e. the animal) and its background with different coding strategies and priorities. Specifically, we firstly construct a convolution neural network via the MobileNet model for the detection of the saliency object region and obtaining the mask on wildlife. Then, according to the importance of wavelet coefficients, set partitioned in hierarchical tree (SPIHT) lossless coding is utilized to transmit the saliency image which ensures the transmission accuracy of the wildlife region. After that, the background region left over is transmitted via the Embedded Zerotree Wavelets (EZW) lossy coding strategy, to improve the transmission efficiency. To verify the efficiency of our algorithm, a demonstration of the transmission of field-captured wildlife images is presented. Further, comparison of results with existing EZW and discrete cosine transform (DCT) algorithms shows that the proposed algorithm improves the peak signal to noise ratio (PSNR) and structural similarity index (SSIM) by 21.11%, 14.72% and 9.47%, 6.25%, respectively.

scholarly journals An Improved Hierarchical Genetic Algorithm for Sheet Cutting Scheduling with Process Constraints

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Yunqing Rao ◽  
Dezhong Qi ◽  
Jinling Li
Keyword(s):  
Genetic Algorithm ◽  
Parallel Machines ◽  
Convergence Rates ◽  
Cutting Stock ◽  
Hierarchical Coding ◽  
Crossover Probability ◽  
Speed Up ◽  
Adaptive Crossover ◽  
Process Constraints ◽  
Hierarchical Genetic Algorithm

For the first time, an improved hierarchical genetic algorithm for sheet cutting problem which involvesncutting patterns formnon-identical parallel machines with process constraints has been proposed in the integrated cutting stock model. The objective of the cutting scheduling problem is minimizing the weighted completed time. A mathematical model for this problem is presented, an improved hierarchical genetic algorithm (ant colony—hierarchical genetic algorithm) is developed for better solution, and a hierarchical coding method is used based on the characteristics of the problem. Furthermore, to speed up convergence rates and resolve local convergence issues, a kind of adaptive crossover probability and mutation probability is used in this algorithm. The computational result and comparison prove that the presented approach is quite effective for the considered problem.

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