scholarly journals An Extensive Literature Review on Underwater Image Colour Correction

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5690
Author(s):  
Marinos Vlachos ◽  
Dimitrios Skarlatos
Keyword(s):  
Optical Properties ◽  
Literature Review ◽  
Light Propagation ◽  
Quality Evaluation ◽  
Marine Biology ◽  
Extensive Literature ◽  
Extensive Review ◽  
Scientific Interest ◽  
Vast Number ◽  
Underwater Image

The topic of underwater (UW) image colour correction and restoration has gained significant scientific interest in the last couple of decades. There are a vast number of disciplines, from marine biology to archaeology, that can and need to utilise the true information of the UW environment. Based on that, a significant number of scientists have contributed to the topic of UW image colour correction and restoration. In this paper, we try to make an unbiased and extensive review of some of the most significant contributions from the last 15 years. After considering the optical properties of water, as well as light propagation and haze that is caused by it, the focus is on the different methods that exist in the literature. The criteria for which most of them were designed, as well as the quality evaluation used to measure their effectiveness, are underlined.

Perspective on the Tidal Bore: Background and Initiation

2012 ◽  
Author(s):  
S. David Graber
Keyword(s):  
Literature Review ◽  
Field Data ◽  
Historical Context ◽  
Companion Paper ◽  
Extensive Literature ◽  
Scientific Interest ◽  
Tidal Bore ◽  
Extensive Literature Review ◽  
Tidal Bores ◽  
The Subject

Tidal bores have been the subject or cause of legend, poetry, recreation, tourism, shipping disasters, and scientific interest for centuries. They pose interesting theoretical questions for the engineer. Introductory details are presented regarding the remarkable tidal bore phenomenon, including discussion of the tidal bore in various locations and a recent photograph taken by the writer of the bore on China’s Qiantang River. A supplemental tabular summary is presented based on an extensive literature review. A simplified theory based on monoclinal rising waves is developed for the initiation of the tidal bore. The theory elucidates the mechanisms of the tidal bore more clearly and completely than more complex theories. Early studies of the tidal bore are cited and discussed in historical context. The intention is to provide greater understanding of the tidal bore for a broad set of readers. The theory is favorably compared to rectangular flume data and to all field data available to the writer. A companion paper builds on the present one by addressing additional features of the tidal bore.

scholarly journals Keratin Associations with Synthetic, Biosynthetic and Natural Polymers: An Extensive Review

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 32 ◽  
Author(s):  
Ricardo K. Donato ◽  
Alice Mija
Keyword(s):  
Literature Review ◽  
Historical Context ◽  
Cost Effective ◽  
Polymer Matrices ◽  
Advanced Materials ◽  
Extensive Literature ◽  
Extensive Review ◽  
Natural Polymers ◽  
Side Stream ◽  
Different Sources

Among the biopolymers from animal sources, keratin is one the most abundant, with a major contribution from side stream products from cattle, ovine and poultry industry, offering many opportunities to produce cost-effective and sustainable advanced materials. Although many reviews have discussed the application of keratin in polymer-based biomaterials, little attention has been paid to its potential in association with other polymer matrices. Thus, herein, we present an extensive literature review summarizing keratin’s compatibility with other synthetic, biosynthetic and natural polymers, and its effect on the materials’ final properties in a myriad of applications. First, we revise the historical context of keratin use, describe its structure, chemical toolset and methods of extraction, overview and differentiate keratins obtained from different sources, highlight the main areas where keratin associations have been applied, and describe the possibilities offered by its chemical toolset. Finally, we contextualize keratin’s potential for addressing current issues in materials sciences, focusing on the effect of keratin when associated to other polymers’ matrices from biomedical to engineering applications, and beyond.

Quality Evaluation of Health Information Systems: A Systematic Literature Review (Preprint)

2020 ◽  
Author(s):  
René Noël ◽  
Carla Taramasco ◽  
Gastón Márquez
Keyword(s):  
Literature Review ◽  
Health Information ◽  
Systematic Literature Review ◽  
Quality Evaluation ◽  
Health Information System ◽  
Care Quality ◽  
Assessment Process ◽  
Current Scenario ◽  
Patient Care Quality ◽  
Critical Components

BACKGROUND Evaluating Health Information System (HIS) quality is strategically advantageous for improving patient care quality. Nevertheless, there is little research evidence identifying and describing what standards, processes, and tools are used to evaluate HIS quality. OBJECTIVE This study aims to illustrate, detail, and discuss the current scenario regarding the standards, norms, processes, and tools used to evaluate HIS quality. METHODS We conduct a systematic literature review (SLR) using review guidelines focused on software and systems. We examined seven electronic databases (Scopus, ACM, ScienceDirect, Google Scholar, IEEE Xplorer, the Web of Science and PubMed) to search and select primary studies. Three researchers and three collaborators participated in the review and quality assessment process of the studies. RESULTS We identified 17 primary studies that have been published in journals and conferences. We found that most of the primary studies address quality evaluation from a management perspective. Second, there is little explicit and pragmatic evidence on the processes and tools that allow evaluation of HIS quality. CONCLUSIONS To promote quality evaluation of HISs, it is necessary to define mechanisms and methods that operationalize the standards and norms of HISs. Additionally, it is necessary to create metrics that measure the quality of the most critical components and processes of HISs. CLINICALTRIAL Does not apply to our study

scholarly journals Thiophene-Based Trimers and Their Bioapplications: An Overview

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1977
Author(s):  
Lorenzo Vallan ◽  
Emin Istif ◽  
I. Jénnifer Gómez ◽  
Nuria Alegret ◽  
Daniele Mantione
Keyword(s):  
Optical Properties ◽  
Medical Research ◽  
Turning Point ◽  
State Of The Art ◽  
Thiophene Ring ◽  
Functional Polymers ◽  
Direct Application ◽  
Synthetic Methods ◽  
Scientific Interest ◽  
Chemical Modifications

Certainly, the success of polythiophenes is due in the first place to their outstanding electronic properties and superior processability. Nevertheless, there are additional reasons that contribute to arouse the scientific interest around these materials. Among these, the large variety of chemical modifications that is possible to perform on the thiophene ring is a precious aspect. In particular, a turning point was marked by the diffusion of synthetic strategies for the preparation of terthiophenes: the vast richness of approaches today available for the easy customization of these structures allows the finetuning of their chemical, physical, and optical properties. Therefore, terthiophene derivatives have become an extremely versatile class of compounds both for direct application or for the preparation of electronic functional polymers. Moreover, their biocompatibility and ease of functionalization make them appealing for biology and medical research, as it testifies to the blossoming of studies in these fields in which they are involved. It is thus with the willingness to guide the reader through all the possibilities offered by these structures that this review elucidates the synthetic methods and describes the full chemical variety of terthiophenes and their derivatives. In the final part, an in-depth presentation of their numerous bioapplications intends to provide a complete picture of the state of the art.

scholarly journals An Underwater Image Enhancement Algorithm Based on Generative Adversarial Network and Natural Image Quality Evaluation Index

2021 ◽  
Vol 9 (7) ◽  
pp. 691
Author(s):  
Kai Hu ◽  
Yanwen Zhang ◽  
Chenghang Weng ◽  
Pengsheng Wang ◽  
Zhiliang Deng ◽  
...  
Keyword(s):  
Image Quality ◽  
Image Enhancement ◽  
Quality Evaluation ◽  
High Efficiency ◽  
Natural Image ◽  
High Quality ◽  
Generative Adversarial Network ◽  
Image Quality Evaluation ◽  
Adversarial Network ◽  
Underwater Image

When underwater vehicles work, underwater images are often absorbed by light and scattered and diffused by floating objects, which leads to the degradation of underwater images. The generative adversarial network (GAN) is widely used in underwater image enhancement tasks because it can complete image-style conversions with high efficiency and high quality. Although the GAN converts low-quality underwater images into high-quality underwater images (truth images), the dataset of truth images also affects high-quality underwater images. However, an underwater truth image lacks underwater image enhancement, which leads to a poor effect of the generated image. Thus, this paper proposes to add the natural image quality evaluation (NIQE) index to the GAN to provide generated images with higher contrast and make them more in line with the perception of the human eye, and at the same time, grant generated images a better effect than the truth images set by the existing dataset. In this paper, several groups of experiments are compared, and through the subjective evaluation and objective evaluation indicators, it is verified that the enhanced image of this algorithm is better than the truth image set by the existing dataset.

Die kognitive Legitimität aus Kundensicht im Kontext neuer Unternehmen

2021 ◽  
Author(s):  
Miriam Lohrmann
Keyword(s):  
Literature Review ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Extensive Literature ◽  
Extensive Literature Review ◽  
New Business ◽  
Potential Customers ◽  
Cognitive Legitimacy

Customer cognitive legitimacy is an important factor in a new business venture’s survival. Based on an extensive literature review of customer cognitive legitimacy, this book examines the consistent conceptualisation of the concept and its dimensional structure. This consistent conceptualisation facilitates the development of the reliable and valid three-dimensional customer cognitive legitimacy scale in 10 studies. The scale is based on potential customers’ interest in acquiring knowledge about a product and the company responsible for it, their perception of the company’s and the product’s future, and their perception of how competent the company’s managers are.

scholarly journals Pseudomyxoma Peritonei Originating from Transverse Colon Mucinous Adenocarcinoma: A Case Report and Literature Review

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Yingbo Gong ◽  
Xin Wang ◽  
Zhi Zhu
Keyword(s):  
Literature Review ◽  
Pseudomyxoma Peritonei ◽  
Transverse Colon ◽  
Mucinous Adenocarcinoma ◽  
Lung Metastases ◽  
Metastatic Cancer ◽  
Genetic Profile ◽  
Low Grade ◽  
Extensive Literature ◽  
Cancer Multiple

Background. Pseudomyxoma peritonei (PMP) is a rare neoplasm involving the peritoneum. Most PMPs are low-grade appendicular mucinous neoplasms (LAMNs). There have been no reports of PMP originating from a transverse colonic mucinous adenocarcinoma and causing metastatic mucinous adenocarcinoma. Case Presentation. We report a 46-year-old woman who presented with a right abdominal mass of more than 4-month duration. Transverse colonic mucinous adenocarcinoma, PMP, and ovarian metastatic mucinous adenocarcinoma were diagnosed. The patient’s diet was normal, and she had no abdominal pain or bloating. The abdomen mass increased in the month before treatment. After chemotherapy, the transverse colon mass and ovarian giant cyst were resected and about 2000 mL of gelatinous tumor tissue was removed. Postoperative histology confirmed PMP from the transverse colonic mucinous adenocarcinoma, ovarian metastatic mucinous adenocarcinoma, and mesocolon metastatic cancer. Multiple lung metastases appeared 8 months after surgery. The patient died 29 months after surgery because of an inability to eat and poor nutrition. A systematic literature review of the management and outcome of all known similar cases is also presented. Conclusions. This is the first report of PMP originating from a transverse colonic mucinous adenocarcinoma. It was diagnosed during resective surgery, involved ovarian metastasis, and survival was short. We did an extensive literature review in order to describe the clinical characteristics, histopathological findings, genetic profile, and potential treatments of PMP caused by nonappendiceal mucinous adenocarcinoma.

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