A review on recent advances and challenges of ionic wind produced by corona discharges with practical applications

2021 ◽  
Author(s):  
Jingguo Qu ◽  
Minjun Zeng ◽  
Dewei Zhang ◽  
Dakai Yang ◽  
Xiongwei Wu ◽  
...  
Keyword(s):  
Corona Discharge ◽  
Experimental Studies ◽  
Wind Generation ◽  
Future Research ◽  
Discharge Process ◽  
Ionic Wind ◽  
Practical Applications ◽  
Wind Generators ◽  
Wide Range ◽  
Gas Ionization

Abstract Ionic wind, an induced phenomenon during corona discharge, possessing the features of silent operation and no moving parts, has a wide range of applications. Ionic wind generation is accompanied by complex physical processes, involving gas ionization, ion recombination, flow, and various chemical reactions, as well as mutual couplings between some of them. Therefore, understanding the corona discharge process and ionic wind generation is crucial for researchers and engineers to better utilize this phenomenon in practical applications. In this review, the principles of corona discharge and its induced ionic wind are presented. Subsequently, ionic wind generators (IWGs) are discussed according to their applications, and the corresponding advances based on experimental studies and numerical simulations are also reviewed. Moreover, the challenges of transitioning the ionic wind technology from laboratory studies to practical applications are discussed. These challenges include the excessively high onset voltage of the corona, ozone emission, and influence of environmental conditions. Furthermore, the mechanisms of these barriers and several effective approaches for mitigating them are provided. Finally, some future research prospects and the conclusions are presented.

scholarly journals Direct detection of charge and discharge process in supercapacitor by fiber-optic LSPR sensors

Nanophotonics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 1071-1079 ◽  
Author(s):  
Siyu Qian ◽  
Xinlong Chen ◽  
Shiyu Jiang ◽  
Qiwen Pan ◽  
Yachen Gao ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Direct Detection ◽  
Low Cost ◽  
The State ◽  
State Of Charge ◽  
Localized Surface Plasmon ◽  
High Price ◽  
Discharge Process ◽  
Practical Applications ◽  
Wide Range

AbstractSupercapacitors with high power density, ultralong lifespan and wide range operating temperature have drawn significant attention in recent years. However, monitoring the state of charge in supercapacitors in a cost-effective and flexible way is still challenging. Techniques such as transmission electron microscopy and X-ray diffraction can analyze the characteristics of supercapacitor well. But with large size and high price, they are not suitable for daily monitoring of the supercapacitors’ operation. In this paper, a low cost and easily fabricated fiber-optic localized surface plasmon resonance (LSPR) probe is proposed to monitor the state of charge of the electrode in a supercapacitor. The Au nanoparticles were loading on the fiber core as LSPR sensing region. In order to implant the fiber in the supercapacitor, a reflective type of fiber sensor was used. The results show that this tiny fiber-optic LSPR sensor can provide online monitoring of the state of charge during the charging and discharging process in situ. The intensity shift in LSPR sensor has a good linear relationship with the state of charge calculated by standard galvanostatic charging and discharging test. In addition, this LSPR sensor is insensitive to the temperature change, presenting a great potential in practical applications.

A Review of Theoretical and Experimental Research on Various Autofrettage Processes

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Rajkumar Shufen ◽  
Uday S. Dixit
Keyword(s):  
Experimental Studies ◽  
Theoretical Models ◽  
Pressure Vessels ◽  
Future Research ◽  
Spherical Vessel ◽  
Considerable Research ◽  
Wide Range ◽  
Set Up ◽  
Compressive Residual Stresses ◽  
Spherical Pressure

Autofrettage is a metal forming technique widely incorporated for strengthening the thick-walled cylindrical and spherical pressure vessels. The technique is based on the principle of initially subjecting the cylindrical or spherical vessel to partial plastic deformation and then unloading it; as a result of which compressive residual stresses are set up. On the basis of the type of the forming load, autofrettage can be classified into hydraulic, swage, explosive, thermal, and rotational. Considerable research studies have been carried out on autofrettage with a variety of theoretical models and experimental methods. This paper presents an extensive review of various types of autofrettage processes. A wide range of theoretical models and experimental studies are described. Optimization of an autofrettage process is also discussed. Based on the review, some challenging issues and key areas for future research are identified.

An empirical model for ionic wind generation by a needle-to-cylinder dc corona discharge

2015 ◽  
Vol 73 ◽  
pp. 125-130 ◽  
Author(s):  
Longnan Li ◽  
Seung Jun Lee ◽  
Wonjung Kim ◽  
Daejoong Kim
Keyword(s):  
Corona Discharge ◽  
Empirical Model ◽  
Wind Generation ◽  
Ionic Wind

scholarly journals Utility value interventions: Why and how instructors should use them in college psychology courses.

2020 ◽  
Author(s):  
Raechel N. Soicher ◽  
Kathryn A. Becker-Blease
Keyword(s):  
Achievement Motivation ◽  
Large Body ◽  
Experimental Studies ◽  
Future Research ◽  
College Level ◽  
Utility Value ◽  
Expectancy Value ◽  
Course Content ◽  
Future Goals ◽  
Wide Range

According to expectancy-value models of achievement motivation, a core component of increasing student motivation is utility value. Utility value refers to the importance that a task has in one’s future goals. Utility value interventions provide an opportunity for students to make explicit connections between course content and their own lives. A large body of literature suggests that utility value interventions are effective for a wide range of students (e.g., both adolescent and adult learners) in a variety of courses (e.g., introductory psychology, introductory biology, and physics). This review provides (1) an overview of an expectancy value model of achievement motivation, (2) a comprehensive review of the experimental studies of utility value interventions in psychology, (3) concrete pedagogical recommendations based on the evidence from over thirty studies of the utility value intervention, and (4) suggestions for future research directions. After reading this review, college-level psychology instructors should be able to decide whether the utility value intervention is appropriate for their own course and, if so, implement the intervention effectively.

scholarly journals Temporal patterns of microglial activation in white matter following experimental mild traumatic brain injury: a systematic literature review

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Prashanth S. Velayudhan ◽  
Nicole Schwab ◽  
Lili-Naz Hazrati ◽  
Anne L. Wheeler
Keyword(s):  
Brain Injury ◽  
White Matter ◽  
Microglial Activation ◽  
Brain Injuries ◽  
Experimental Studies ◽  
Current Understanding ◽  
Future Research ◽  
Cell Integrity ◽  
Experimental Conditions ◽  
Wide Range

AbstractMild traumatic brain injuries (mTBIs) are a prevalent form of injury that can result in persistent neurological impairments. Microglial activation has become increasingly recognized as a key process regulating the pathology of white matter in a wide range of brain injury and disease contexts. As white matter damage is known to be a major contributor to the impairments that follow mTBI, microglia have rightfully become a common target of investigation for the development of mTBI therapies and biomarkers. Recent work has demonstrated that the efficacy of microglial manipulation as a therapeutic intervention following injury or disease is highly time-sensitive, emphasizing the importance of advancing our understanding of the dynamics of post-mTBI microglial activation from onset to resolution. Current reporting of microglial activation in experimental studies of mTBI is non-standardized, which has limited our ability to identify concrete patterns of post-mTBI microglial activation over time. In this review, we examine preclinical studies of mTBI that report on microglial activation in white matter regions to summarize our current understanding of these patterns. Specifically, we summarize timecourses of post-mTBI microglial activation in white matter regions of the brain, identify factors that influence this activation, examine the temporal relationship between microglial activation and other post-mTBI assessments, and compare the relative sensitivities of various methods for detecting microglial activation. While the lack of replicated experimental conditions has limited the extent of conclusions that can confidently be drawn, we find that microglia are activated over a wide range of timecourses following mTBI and that microglial activation is a long-lasting outcome of mTBI that may resolve after most typical post-mTBI assessments, with the exception of those measuring oligodendrocyte lineage cell integrity. We identify several understudied parameters of post-mTBI microglial activation in white matter, such as the inclusion of female subjects. This review summarizes our current understanding of the progression of microglial activation in white matter structures following experimental mTBI and offers suggestions for important future research directions.

scholarly journals Categorizing findings on Language Tutor Autonomy (LTA) From Interviews

Relay Journal ◽  
2018 ◽  
pp. 236-246
Author(s):  
Tomoya Shirakawa
Keyword(s):  
Teaching And Learning ◽  
Social Contexts ◽  
Qualitative Approach ◽  
Future Research ◽  
Structured Interviews ◽  
Practical Applications ◽  
Tutoring Program ◽  
Wide Range ◽  
International University ◽  
The University

Language Tutor Autonomy (LTA) is a new area of research and spans a wide range of social contexts with important implications. Anyone can be a tutor, and by doing so, they can learn by teaching. LTA can potentially may have many practical applications and, therefore, should be subject to further investigation. This study used interviews to understand LTA from the tutors’ perspective. The context was a peer tutoring program at an international university in Japan specializing in self-access learning. 11 tutors participated in the research, who are all undergraduate (2nd to 4th year) students enrolled in the university. A qualitative approach using semi-structured interviews was employed in order to understand how their teaching as tutors influences their learning as students, and, primarily, to identify unique aspects of LTA. The results were organized according to interview questions concerning: (1) dealing with difficulty, (2) preparing for weekly sessions, (3) sharing experiences (beyond teaching English) and (4) developing personally from the tutoring experience. The paper will offer a model of LTA and a framework for future research and practical applications in self-access learning settings, including peer teaching and learning advising.

scholarly journals Ionic wind generation by a wire-cylinder-plate corona discharge in air at atmospheric pressure

2010 ◽  
Vol 108 (10) ◽  
pp. 103306 ◽  
Author(s):  
Dorian F. Colas ◽  
Antoine Ferret ◽  
David Z. Pai ◽  
Deanna A. Lacoste ◽  
Christophe O. Laux
Keyword(s):  
Corona Discharge ◽  
Atmospheric Pressure ◽  
Wind Generation ◽  
Ionic Wind

scholarly journals The Potential of Introduction of Asian Vegetables in Europe

Horticulturae ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. 38
Author(s):  
Jungha Hong ◽  
Nazim S. Gruda
Keyword(s):  
Vegetable Consumption ◽  
Health Benefits ◽  
Experimental Studies ◽  
Future Research ◽  
Eu Member States ◽  
Current Trends ◽  
Ecological Aspects ◽  
Wide Range ◽  
Consumption Benefits ◽  
The Eu

Increasing longevity, along with an aging population in Europe, has caused serious concerns about diet-related chronic diseases such as obesity, diabetes, cardiovascular diseases, and certain cancers. As recently noted during the coronavirus pandemic, regular exercise and a robust immune system complemented by adequate consumption of fruit and vegetables are recommended due to their known health benefits. Although the volume of fresh vegetable consumption in the EU is barely growing, demand for diversified, nutritious, and exotic vegetables has been increasing. Therefore, the European market for fresh Asian vegetables is expected to expand across the EU member states, and the introduction of new vegetables has enormous potential. We conducted this review to address the high number and wide range of Asian vegetable species with a commercial potential for introduction into the current European vegetable market. Many of them have not received any attention yet. Four Asian vegetables: (1) Korean ginseng sprout, (2) Korean cabbage, (3) Coastal hog fennel and (4) Japanese (Chinese or Korean) angelica tree, are further discussed. All of these vegetables possess several health benefits, are increasingly in demand, are easy to cultivate, and align with current trends of the European vegetable market, e.g., vegetables having a unique taste, higher value, are decorative and small. Introducing Asian vegetables will enhance the diversity of nutritious horticultural products in Europe, associated with all their respective consumption benefits. Future research on the Asian vegetable market within Europe is needed. In addition, experimental studies of Asian vegetables under practical conditions for their production in different European environments are required. Economic, social, and ecological aspects also ought to be considered.

scholarly journals A ‘Speed—Difficulty—Accuracy’ Model Following a General Trajectory Motor Task with Spatial Constraints: An Information-Based Model

2020 ◽  
Vol 10 (21) ◽  
pp. 7516
Author(s):  
Salvatore Digiesi ◽  
Andrea Lucchese ◽  
Carlotta Mummolo
Keyword(s):  
Field Experiments ◽  
Experimental Studies ◽  
Motor Task ◽  
Research Field ◽  
Future Research ◽  
Motor Tasks ◽  
Task Execution ◽  
General Validity ◽  
Practical Applications ◽  
Speed Accuracy

Accuracy in executing a motor task, i.e., in following a given trajectory under geometrical constraints, is of great interest in work operations as well as in biomechanics applications. In the framework of the Fitts’ law research on motor tasks, experimental studies usually refer to simple trajectories which are of low interest in practical applications. Furthermore, available models lack predicting accuracy in executing motor tasks since do not systematically investigate effects of both speed and task difficulty (index of difficulty (ID)). In this paper, the authors propose a ‘Speed-ID-Accuracy’ model aiming at overcoming abovementioned limits. The model is of general validity as is based on an information-based formulation of a trajectory ID; the model proposed put into relation accuracy in task execution with a general trajectory and with the speed of task execution. Modeling accuracy, defined as standard deviation of the endpoint position, is carried out by regressing data available in the literature. The model proposed proves to be more accurate than the classical ‘Speed-Accuracy’ model in fitting available data. Such a result has been found in both numerical cases relating to ‘tunnel’ and ‘circular’ traveling tasks. Limits of data from field experiments are stressed out and future research field of investigations in work environment and biomechanics are figured out.

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