scholarly journals A Comprehensive Review on Edge Caching from the Perspective of Total Process: Placement, Policy and Delivery

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5033
Author(s):  
Honghai Wu ◽  
Yizheng Fan ◽  
Yingda Wang ◽  
Huahong Ma ◽  
Ling Xing
Keyword(s):  
Policy Design ◽  
Smart Devices ◽  
Future Directions ◽  
Core Networks ◽  
Placement Optimization ◽  
Network Load ◽  
Total Process ◽  
Five Phases ◽  
Edge Caching

With the explosive growth of smart devices and mobile applications, mobile core networks face the challenge of exponential growth in traffic and computing demand. Edge caching is one of the most promising solutions to the problem. The main purpose of edge caching is to place popular content that users need at the edge of the network, borrow free space to reduce user waiting time, and lighten the network load by reducing the amount of duplicate data. Due to the promising advantages of edge caching, there have been many efforts motivated by this topic. In this paper, we have done an extensive survey on the existing work from our own perspectives. Distinguished from the existing review articles, our work not only investigates the latest articles in this area, but more importantly, covers all the researches of the total process of edge caching from caching placement optimization, policy design, to the content delivery process. In particular, we discuss the benefits of caching placement optimization from the perspective of different stakeholders, detail the delivery process, and conduct in-depth discussions from the five phases, i.e., requested content analysis, user model analysis, content retrieval, delivery, and update. Finally, we put forward several challenges and potential future directions, and hope to bring some ideas for the follow-up researches in this area.

National Informatization Policy in Korea: A Historical Reflection and Policy Implications

2021 ◽  
Vol 36 (1) ◽  
pp. 27-43
Author(s):  
Lee Changhee
Keyword(s):  
Policy Implementation ◽  
Success Factors ◽  
Policy Design ◽  
Policy Instruments ◽  
Implementation Process ◽  
Policy Implications ◽  
Digital Revolution ◽  
The Past ◽  
Historical Reflection ◽  
Five Phases

This study examines, from a historical and macro perspective, the national informatization strategy that Korea has pursued over the past 40 years which laid the foundation for the rise of Korea as one of the leading countries in the digital revolution today. In particular, the informatization process is divided into five phases from the 1980s to the present, and analyzed in three aspects ? main policies and plans, policy implementation system and structure, and major laws. And based on the previous research results, the success factors of informatization in Korea are discussed in terms of policy actors and institutions, policy implementation process, and policy environment. After examining the limitations of Korea’s informatization policy, policy implications for developing countries are drawn in terms of policy process, policy design, and policy instruments.

scholarly journals Application of OCT in the Gastrointestinal Tract

2019 ◽  
Vol 9 (15) ◽  
pp. 2991 ◽  
Author(s):  
Nicholas S. Samel ◽  
Hiroshi Mashimo
Keyword(s):  
Gastrointestinal Tract ◽  
Field Evaluation ◽  
Wide Field ◽  
Gi Tract ◽  
Advanced Imaging ◽  
Future Directions ◽  
Future Therapy ◽  
Near Future ◽  
The U.S

Optical coherence tomography (OCT) is uniquely poised for advanced imaging in the gastrointestinal (GI) tract as it allows real-time, subsurface and wide-field evaluation at near-microscopic resolution, which may improve the current limitations or even obviate the need of superficial random biopsies in the surveillance of early neoplasias in the near future. OCT’s greatest impact so far in the GI tract has been in the study of the tubular esophagus owing to its accessibility, less bends and folds and allowance of balloon employment with optimal contact to aid circumferential imaging. Moreover, given the alarming rise in the incidence of Barrett’s esophagus and its progression to adenocarcinoma in the U.S., OCT has helped identify pathological features that may guide future therapy and follow-up strategy. This review will explore the current uses of OCT in the gastrointestinal tract and future directions, particularly with non-endoscopic office-based capsule OCT and the use of artificial intelligence to aid in diagnoses.

A Fused Algorithm for Sovling VLSI Placement Problem

2013 ◽  
Vol 321-324 ◽  
pp. 404-407
Author(s):  
Ya Juan Zhang ◽  
Zong Xin Jin ◽  
Xue Chun Wang
Keyword(s):  
Ant Colony Algorithm ◽  
Simulated Annealing Algorithm ◽  
Placement Problem ◽  
Placement Optimization ◽  
Vlsi Physical Design ◽  
Random Optimization ◽  
Initial Placement ◽  
Iterative Improvement ◽  
Annealing Algorithm

Placement is the crucial step in modern VLSI physical design, and the result may decisively influence the follow-up wiring design. The advantages and limitations of the random optimization algorithm, ant colony algorithm, genetic algorithm, heuristic algorithm and simulated annealing algorithm which are used for placement optimization were analyzed in allusion to optimal search problems of VLSI placement. With a view to speedability of search, global convergence and the optimality of the solution, the initial placement is received through integrated use of all algorithms. In the meantime, the iterative improvement placement is realized by means of dynamic multi-branch tree. Practice has shown that the structure of the algorithm is clear, and it can also ensure the optimality of the received solution.

The Existence of the Borderline Diagnosis: Studies on Diagnostic Validity

1982 ◽  
Vol 27 (7) ◽  
pp. 585-592 ◽  
Author(s):  
Paul S. Links
Keyword(s):  
Clinical Practice ◽  
Close Relationships ◽  
Current Status ◽  
Diagnostic Validity ◽  
Laboratory Studies ◽  
Follow Up Studies ◽  
Initial Support ◽  
Borderline Diagnosis ◽  
Five Phases

The author discusses the validity of the borderline concept in terms of the recent empirical research. Five phases of exploration are reviewed; namely, clinical descriptions, laboratory studies, delineation from other disorders, follow-up studies, and family studies. These data are related to the current status of the diagnosis for clinical practice and to areas warranting further research. The conclusions reached show initial support for the validity of the borderline diagnosis. Descriptively, the literature tends to characterize these patients as having impulsivity, heightened affect, mild psychotic reactions and disturbed close relationships. Speculation about possible etiologies is felt to be premature and the identification of meaningful subgroups of patients within this syndrome is not yet possible. Further research using the objective scales in well-defined samples is felt to be required, as are family and prospective follow-up studies.

Affective Forecasting Bias: Liability or Protective Factor?

2018 ◽  
Vol 32 (4) ◽  
pp. 263-271 ◽  
Author(s):  
Susan J. Wenze ◽  
Kathleen C. Gunthert
Keyword(s):  
Life Stress ◽  
Protective Factor ◽  
Negative Mood ◽  
Affective Forecasting ◽  
Life Change ◽  
Depression And Anxiety ◽  
Future Directions ◽  
Prediction Bias ◽  
Ecological Momentary

We examined whether affective forecasting biases prospectively predict depression and anxiety symptoms in the context of life stress. Participants (n = 72) completed– baseline measures of depression, anxiety, and mood predictions, followed by one week of ecological momentary assessments of mood. Three months later, they completed measures of depression, anxiety, and life stress. Neither positive nor negative mood prediction biases at baseline were associated with follow-up anxiety scores. Positive mood prediction biases were not associated with follow-up depression scores. However, the interaction between negative mood prediction bias and life stress predicted follow-up depression scores. Under conditions of greater life stress, stronger negative mood prediction biases predicted lower follow-up depression scores. Under conditions of positive life change, stronger negative mood prediction biases predicted higher follow-up depression scores. Negative mood prediction bias might serve as a protective or liability factor, depending on levels of stress. Clinical implications and future directions are discussed.

Future Directions in Pediatric Epileptology

1994 ◽  
Vol 9 (2_suppl) ◽  
pp. 2S74-2S78
Author(s):  
Warren T. Blume
Keyword(s):  
Molecular Genetic ◽  
Developed Countries ◽  
Epidemiologic Studies ◽  
Pediatric Epilepsy ◽  
Cortical Lesions ◽  
Future Directions ◽  
Genetic Studies ◽  
Seizure Disorders ◽  
Epileptic Patients

Rapid developments in several areas of epileptology alter or clarify concepts and bring new hope to epileptic patients and their associates. Brief discussions of such advances comprise this report. Experimental and clinical data concerning the pathogenesis of cognitive impairment in some epileptic conditions are reviewed. Epidemiologic studies have altered some long-held concepts concerning etiology of seizures in early life. Molecular genetic studies have disclosed abnormalities in some of the epilepsies: a genetic predisposition to epilepsy may explain why some patients with cortical lesions develop seizures and others do not. It is suggested that many questions regarding surgery in pediatric epilepsy will be resolved only by more reliable techniques of case selection and follow-up. Practitioners in developed countries must realize how rudimentary is the care given to the unfortunate many with seizure disorders in less advantaged areas. (J Child Neurol 1994;9(Suppl)2S74-2S78).

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