A critical review: Electromagnetic shielding for pyrrole used textile materials

2020 ◽  
pp. 152808372093815
Author(s):  
Nurcan Biçer ◽  
Irem Tuğçe Çelik ◽  
Ishak Afşin Kariper
Keyword(s):  
Literature Review ◽  
Critical Review ◽  
Electromagnetic Waves ◽  
Daily Life ◽  
Electronic Devices ◽  
Electromagnetic Shielding ◽  
Human Beings ◽  
Discussion Section ◽  
Textile Materials ◽  
Yarn Structure

In this study, we examined the notable textile materials in the literature, which have been produced to prevent the electromagnetic waves emitted by the electronic devices that are a significant part of our lives. Nowadays, these devices and technologies that bring us many advantages in our daily life cause health problems on human beings, which leaded this type of studies to deepen. In this study, non-woven and woven products were examined. Produced tissue types found in the literature were excluded from the research. This literature review is mainly focused on the textile materials treated with pyrrole and having electromagnetic shielding property by producing via different methods either by doping metal in the fabric or yarn structure or by weaving with metal. Because it is known that the most successful studies on electromagnetic shielding were made by polypyrrole coating. In the last part of the study, suggestions have been submitted about the type of studies that should be done to provide electromagnetic shielding feature to the textile materials. We investigated 56 articles about electromagnetic shielding in the literature. 48 of 56 articles were evaluated. It seems that the researchers used to polypyrrole for electromagnetic shielding on textile surface, however they don’t investigate to advantage and disadvantage of polypyrrole for using. We discussed this issue and which material was more effective for electromagnetic shielding on the textile surface in the discussion section.

scholarly journals THEELECTROMAGNETICSHIELDINGBEHAVIOROFLAYERED KNITTED FABRIC STRUCTURES

2019 ◽  
Vol 2019 ◽  
pp. 32-35
Author(s):  
Özlem KAYACAN ◽  
Neza BAKIR ◽  
Barkın TRAŞ
Keyword(s):  
Electromagnetic Waves ◽  
Childhood Leukemia ◽  
Industrial Applications ◽  
Electromagnetic Shielding ◽  
Human Beings ◽  
Shielding Effectiveness ◽  
Technical Textiles ◽  
Fabric Structures ◽  
Electromagnetic Pollution ◽  
Risk Of Cancer

The increase in daily usage of electrical and electronic tools simplify the lives of human beings, on the other hand, they also create an enormous electromagnetic pollution. In industrial applications, electromagnetic shielding materials are used to prevent these electromagnetic signals. The studies on human health against the electromagnetic pollution was determined that the widely usage of these electronic devices increases the risk of cancer. Especially in low frequency fields, the most consistent evidence is obtained in childhood leukemia [1]. In order to reduce the damage of these electromagnetic waves, researches have been still made on the electromagnetic shielding effectiveness. Electrically conductive technical textiles are also investigated for this aim. Different textile structures such as knitted, woven, composite or coated textiles etc and also different conductive yarns are produced to prevent these harmful waves [2-5].In this study, it is aimed to investigate the electromagnetic shielding performances of conductive knitted fabrics. In order to search the efficiency of these fabrics, single jersey and interlock knitted structures are produced. By using these fabrics, two different types of double-layered fabric structures are formed and the shielding effectiveness of these structures are investigated experimentally [6}.

scholarly journals Effects of Composition on the Electromagnetic Wave Shielding/Absorption and Corrosion in Zn-Ni Alloy Thin Film

2022 ◽  
Vol 60 (1) ◽  
pp. 62-67
Author(s):  
Jeongwook Lim ◽  
Yonghwan Kim ◽  
Yeonjoo Kim ◽  
Pungkeun Song ◽  
Ahram Kwon
Keyword(s):  
Thin Films ◽  
Corrosion Resistance ◽  
Electromagnetic Wave ◽  
Phase Formation ◽  
Electromagnetic Waves ◽  
Absorption Rate ◽  
Near Field ◽  
Electronic Devices ◽  
Electromagnetic Shielding ◽  
Ni Alloy

In the Fourth industrial age, there is increasing use of electronic devices with high frequency (GHz) operating circuits for radio wave transmission/reception. This can lead to electromagnetic noise, and malfunctions in nearby devices. Electromagnetic shielding technology has emerged as an important way of preventing device malfunctions due to noise, and interest in shielding materials for electromagnetic waves has also increased. To allow compact integration and light weight electronic devices, highly efficient, thin and multifunctional film materials are required. This study selected the Zn-Ni alloy, which has adequate corrosion resistance, to protect the metal parent material of electronic components. Various compositions of the alloy were deposited using magnetron sputtering. Phase formation and composition were confirmed through XRD and SEM and EDS. The surface resistance of the thin films was measured using the 4point probe method, to calculate the shielding rate of the thin films. The electromagnetic wave shielding/absorption rate then measured according to frequency and the results compared with the calculated values. Corrosion resistance was evaluated with a polarization test. The far field electromagnetic shielding/absorption rate increased as the Zn content increased, up to 52 dB in a film with 70 at% of Zn. Corrosion resistivity behavior was the opposite. However, the Ni5Zn21 phase formation, which occurred in films with lower Zn composition, helped to improve electromagnetic absorption in the near field as well as corrosion resistivity. Therefore, the optimum composition of the Zn-Ni films was provisionally determined to be around Ni: Zn = 43:57 for electronic devices using electromagnetic waves in the near field range.

Polymeric textile-based electromagnetic interference shielding materials, their synthesis, mechanism and applications – A review

2021 ◽  
pp. 152808372110370
Author(s):  
Faiza Safdar ◽  
Munir Ashraf ◽  
Amjed Javid ◽  
Kashif Iqbal
Keyword(s):  
Electromagnetic Interference ◽  
Hybrid Composites ◽  
Electronic Devices ◽  
High Tech ◽  
Emi Shielding ◽  
Materials Synthesis ◽  
Synthesis Mechanism ◽  
High Frequencies ◽  
Textile Materials ◽  
Shielding Composites

The rapid proliferation of electronic devices and their operation at high frequencies has raised the contamination of artificial electromagnetic radiations in the atmosphere to an unprecedented level that is responsible for catastrophe for ecology and electronic devices. Therefore, the lightweight and flexible electromagnetic interference (EMI) shielding materials are of vital importance for controlling the pollution generated by such high-frequency EM radiations for protecting ecology and human health as well as the other nearby devices. In this regard, polymeric textile-based shielding composites have been proved to be the best due to their unique properties such as lightweight, excellent flexibility, low density, ease of processability and ease of handling. Moreover, such composites cover range of applications from everyday use to high-tech applications. Various polymeric textiles such as fibers, yarn, woven, nonwoven, knitted, as well as their hybrid composites have been extensively manipulated physically and/or chemically to act as shielding against such harmful radiations. This review encompasses from basic concept of EMI shielding for beginner to the latest research in polymeric-based textile materials synthesis for experts, covering detailed mechanisms with schematic illustration. The review also covers the gap of materials synthesis and their application on polymeric textiles which could be used for EMI shielding applications. Furthermore, recent research regarding rendering EMI shielding properties at various stages of polymeric textile development is provided for readers with critical analysis. Lastly, the applications along with environmental compliance have also been presented for better understanding.

scholarly journals A Computational Intelligence Paradigm with Human Computer Interface Learning

2019 ◽  
Vol 9 (2S) ◽  
pp. 384-389
Keyword(s):  
Review Paper ◽  
Electronic Devices ◽  
Computer Interface ◽  
Human Computer Interface ◽  
Human Beings ◽  
Advance Technology ◽  
Physically Challenged ◽  
Lock In ◽  
External Communications ◽  
The Brain

The cognitive Science is the leading technology which works on the principle of Neuroscience. Human Computer Interface is a challenging approach in neurosciences, which is the leading method to handle the brain activities to control external communications with the electronic devices for physically challenged human beings. The various HCI applications are developed with this advance technology. This helps in various patients which are physically challenged or facing the lock in syndrome, a condition where limbs are not functioning to full extent. Therefore, this paper is the review paper to the various EEG signal classification techniques using different taxonomy with techniques like linear, nonlinear, stableubstable, static-discriminant to design various HCI applications.

scholarly journals Habitus and Symbolic Violence in Sar Culture, Merauke, Papua

2021 ◽  
Vol 5 (1) ◽  
pp. 1-14
Author(s):  
Trinovianto George Reinhard Hallatu ◽  
Darsono Wisadirana ◽  
Sholih Mu'adi ◽  
Anif Fatma Chawa
Keyword(s):  
Literature Review ◽  
Violence Against Women ◽  
Positive Influence ◽  
Symbolic Violence ◽  
Human Beings ◽  
Research Results ◽  
Qualitative Descriptive ◽  
Depth Interviews ◽  
Descriptive Method

The sar culture is the pre-existing culture of the Kanum tribe whose implementation is aimed to maintain and preserve nature. Sar culture not only has a positive influence on the environment, but it also represents symbolic violence against women and the Kanum people. This research is aimed to describe sar culture based on the theory of habitus and symbolic violence by Bourdieu. This research involved a qualitative descriptive method, in which the data was obtained from in-depth interviews with Kanum tribal head, Kanum tribe elders, and some village residents involved in sar, observation in Naukenjerai district, and supported by literature review. All collected data were then analyzed descriptively according to the concepts of habitus and symbolic violence by Bourdieu. The research results show that sar culture is a habitus resulting from an interaction between human beings and their nature that has existed for long before. Besides that, there is symbolic violence to the Kanum women and also to the Kaum people, which done by the Kanum men and the leaders of the Kanum tribe as the dominant actors.

scholarly journals Poetic Translation as a Trans-Cultural Process of Enrichment: When Julio Herrera y Reissig Translated Albert Samain

2021 ◽  
pp. 136-145
Author(s):  
Thais Fernández
Keyword(s):  
Critical Review ◽  
Daily Life ◽  
Original Text ◽  
Contrastive Analysis ◽  
Spanish Translation ◽  
Cultural Process ◽  
Poetic Translation ◽  
French Author

This work focuses on the unusual, poetic affinity between the Uruguayan poet, Julio Herrera y Reissig (1875–1910), and the French poet, Albert Samain (1858–1900), that took shape in Julio Herrera y Reissig’s Spanish translation of some of Samain’s poems from his 1898 volume of poems Aux flancs du vase. Our objective is not to write a critical review of Herrera y Reissig's translations. Instead, we aim to identify the similarities between the two poets. Thus, our contrastive analysis will demonstrate the affinities between the French author and his Uruguayan translator. In this collection, Samain was able to transpose the emotions aroused in him by the radiant landscapes and by certain moments in his daily life into terse, sensual and harmonious verse. Even though his style did not in any way conform with the poetic world of Modernism, full of exotic fragrances, colours, swans and characters from the classic world, it gave Herrera y Reissig the opportunity to creatively rework the original text and produce some truly remarkable transformations. These poems in Alexandrine verse place nature centre stage, and the sensations shared by both poets are evoked by their choice of colours and fragrances, by their combinations of sound and the profusion of images of rare intensity.

scholarly journals An 18-year-old girl with retrosternal burning discomfort: a bitter pill to swallow

2021 ◽  
Vol 8 (1) ◽  
pp. e000767
Author(s):  
Mahmoud Gouda ◽  
Ayman Elkholi ◽  
Thomas H Tranah ◽  
Debbie L Shawcross
Keyword(s):  
Literature Review ◽  
Foreign Bodies ◽  
Electronic Devices ◽  
Morbidity And Mortality ◽  
Case Presentation ◽  
Caustic Injury ◽  
Increased Risk ◽  
Oesophageal Injury

Caustic injury secondary to impaction of ingested batteries is a potentially severe cause of oesophageal injury with an increasing incidence that reflects consumer trends and the utilisation of compact electronic devices. Delays to recognition and management are associated with increased risk of complications, morbidity and mortality. In this manuscript, we describe a case presentation and literature review of a patient presenting with upper oesophageal odynophagia after the deliberate ingestion of multiple foreign bodies.

scholarly journals Pendidikan Toleransi dan Relevansinya dengan Dinamika Sosial Masyarakat Indonesia

2020 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Fajri Sodik
Keyword(s):  
Literature Review ◽  
Social Dynamics ◽  
Daily Life ◽  
The State ◽  
Mutual Respect ◽  
Literature Study ◽  
Mutual Help ◽  
The Social ◽  
Tolerance Education ◽  
Brothers And Sisters

The State of Indonesia is known for its pluralistic ethnic society that is constantly undergoing changes in every aspect of life. Tolerance education embedded in society aims to make citizens aware of equality in the life of the nation and state so they are be able to form harmonious Indonesian society side by side. This paper aims to describe the importance of tolerance education in the social dynamics of Indonesian people living in diversity. The method used in this research is literature study (literature review). The results of this study indicate that tolerance education is very relevant in the social dynamics of Indonesian society. The tolerance values ​​that must be instilled by the Indonesian people in daily life include: mutual respect, brothers and sisters, freedom, cooperation, mutual help, non-discrimination and a culture of sharing. With the existence of tolerance education, the Indonesian people can live in harmony and spared from conflict and animosity between fellow citizens.

scholarly journals Nasal BCG Exposure Accelerates Dural Lymphatics Development via Macrophages’ Role in Newborn Mice

2021 ◽  
Author(s):  
Junhua Yang ◽  
Lifang Yuan ◽  
Linyang Song ◽  
Fangfang Qi ◽  
Zejie Zuo ◽  
...  
Keyword(s):  
Single Dose ◽  
Bacterial Infection ◽  
Immune Activation ◽  
Daily Life ◽  
Human Beings ◽  
Newborn Mice ◽  
Bcg Vaccination ◽  
Neonatal Mice ◽  
Nasal Challenge

AbstractThe dural lymphatics develop mainly during the first postnatal month. Lymphatics may be shaped by immune activation when bacterial infection happens. BCG, a strong immune activator, is widely injected to newborns. Moreover, human beings are nasally exposed in daily life to bacterial stimuli. These background prompted us to investigate whether neonatal BCG injection combined with nasally exposure exerts an influence on dural lymphatics develop. Here, mice received a single dose intracutaneous (i.c.) BCG injection immediately after birth followed by repeated nasal BCG challenge once a day (i.c./nasal group). These mice had an accelerated dural lymphatics growth and increased levels of several cytokines and VEGFR-3. Furthermore, macrophages were identified as a key mediator of these alterations. Mice that received mere one dose i.c. BCG injection showed no significant alterations in these indexes. Additionally, mere repeated nasal BCG challenge induced similar effects to i.c./nasal challenge but with a slighter extent. Taken together, these findings show that repeated nasal BCG vaccination accelerates dural lymphatics development in neonatal mice, especially in the presence of neonatal i.c. BCG injection.

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