A Bibliometric Survey on Antipodal Vivaldi Antenna

In this paper bibliometric survey is presented on Antipodal Vivaldi Antenna. The Antipodal Vivaldi Antenna is a broad band and has symmetric E plane and H plane. It has been used extensively in radars, wireless communication and dual polarization applications. The antipodal Vivaldi antenna has significant researches in biomedical imaging, optical lens, Ground-Penetrating Radar (GPR) System, detecting cancer, 5G communications etc. The bibliometric analysis is done for the reason to understand the reach of antipodal Vivaldi antenna and performance enhancement analysis worldwide. The Scopus and web of science are used for accomplishing this survey. The study focuses on 449 documents of conferences, articles, book chapters, review etc in scopus, where in web of science the study was focused on 95 documents of articles. Web of science has research data base of AVA from 1980 and scopus has its database from 1993. The bibliometric analyses are done using i-mapbuilder, VOS builder, Word bar chart, Word It Out, etc in section 3. The bibliometric survey includes the research of document types, year of publications, the various sources involved in performing quality research, affiliations and funding agencies involved to make the research work completed and keywords. It was observed that documents published are mostly in English language. Apart from English language documentation is also done in Chinese and Turkish. The study of this bibliometric analysis shows that the favorable field for antipodal Vivaldi antenna is done under Engineering and Computer Science fields

Data Safeguarding against Internal and External Threats

Today, many organisations use Information Systems to manage their sensitive and critical business related information. The need to protect such a key component of the organisation, and avoid data theft cannot be overemphasised. Data theft can be defined as the act of stealing computer-based information from an unknowing victim with the intent of compromising privacy or obtaining confidential information. The project on which this paper is based deals with the safeguarding of data against internal as well as external threats. The internal threats in this project deal with leakage of data from within an organisation by the means of mountable devices such as USB drives, while the external threats that are considered are those that corrupt data and cause its loss by means of ransomware attacks. Ransomware is malware for data kidnapping, an exploit in which the attacker encrypts the victim's data and demands payment for the decryption key. This paper describes the ways to thwart such external attacks by monitoring a set of folders for early detection of ransomware. On the other hand, internal threats are handling by means of encrypting data while transferring it over USB drives and other mountable devices

Effects of co-habitation between Anopheles gambiae s.s. and Culex quinquefasciatus aquatic stages on life history traits

<p>Abstract</p> <p>Background</p> <p>The effective measures for the control of malaria and filariasis vectors can be achieved by targeting immature stages of anopheline and culicine mosquitoes in productive habitat. To design this strategy, the mechanisms (like biotic interactions with conspecifc and heterospecific larvae) regulating mosquito aquatic stages survivorship, development time and the size of emerging adults should be understood. This study explored the effect of co-habitation between <it>An. gambiae </it>s.s. and <it>Cx. quinquefasciatus </it>on different life history traits of both species under different densities and constant food supply in the habitats of the same size under semi-natural conditions.</p> <p>Methods</p> <p>Experiments were set up with three combinations; <it>Cx. quinquefasciatus </it>alone (single species treatment), <it>An. gambiae </it>s.s. alone (single species treatment); and <it>An. gambiae </it>s.s. with <it>Cx. quiquefasciatus </it>(co-habitation treatment) in different densities in semi field situation.</p> <p>Results</p> <p>The effect of co-habitation of <it>An. gambiae </it>s.s. and <it>Cx. quinquefasciatus </it>was found to principally affect three parameters. The wing-lengths (a proxy measure of body size) of <it>An. gambiae </it>s.s. in co-habitation treatments were significantly shorter in both females and males than in <it>An. gambiae </it>s.s single species treatments. In <it>Cx. quinquefasciatus</it>, no significant differences in wing-length were observed between the single species and co-habitation treatments. Daily survival rates were not significantly different between co-habitation and single species treatments for both <it>An. gambiae </it>s.s. and <it>Cx. quinquefasciatus</it>. Developmental time was found to be significantly different with single species treatments developing better than co-habitation treatments. Sex ratio was found to be significantly different from the proportion of 0.5 among single and co-habitation treatments species at different densities. Single species treatments had more males than females emerging while in co-habitation treatments more females emerged than males. In this study, there was no significant competitive survival advantage in co-habitation.</p> <p>Conclusion</p> <p>These results suggest that co-habitation of <it>An. gambiae </it>s.s. and <it>Cx. quinquefasciatus </it>in semi-natural conditions affect mostly <it>An. gambiae </it>s.s. body size. Hence, more has to be understood on the effects of co-habitation of <it>An. gambiae </it>s.s. and <it>Cx. quinquefasciatus </it>in a natural ecology and its possible consequences in malaria and filariasis epidemiology.</p

MIMO antenna for Fifth Generation mm-Wave Applications: A Bibliometric Survey

Nowadays most discussed technology is mm-wave and 5G communication. The requirement of 5G technology is high bandwidth, high data rate, and low latency. To fulfil these requirements for the current growth in mobile communication multiple input multiple output antenna is used. This bibliometric paper throws light on the various methods used to improve mutual coupling between multiple antennas. Various mutual coupling reduction techniques that are used in MIMO antennas like Dielectric resonator antenna, Electromagnetic Bandgap Structure, Neutralization lines, Defected Ground Structures, Metamaterial, etc. are explained. Scopus database is used for this bibliometric review on mm-wave MIMO 5G technology from the year 2016 to 20th December 2020. This paper elaborates, a bibliometric survey of MIMO antennas used in 5G technology for an mm-wave frequency range

Metamaterials in 5G Antenna Designs: A Bibliometric Survey

The demand of high gain and wideband compact antenna designs are gaining importance to fulfil the need of 5G communication systems. This has opened the doors for the researchers to explore 5G antennas incorporating metamaterials as they can meet the requirement of high gain and wideband compact antennas. Overview of various metamaterial-based antenna designs including Electromagnetic Band Gap (EBG), artificial Magnetic Conductor (AMC), Frequency Selective Surface (FSS) and Partially Reflective Surface (PRS) are discussed in the paper. The paper primarily focuses on bibliometric survey of various types of 5G metamaterial antennas in terms of number of documents published, leading universities actively involved in the related research, distribution of documents in different areas, major contribution of authors and leading journal publishing the documents. Scopus database from 1st September 2014 till date is used to carry out this bibliometric survey. The statistical data presented in this paper can provide the prerequisite for the researchers to work in this area

Fifth Generation Antennas: A Bibliometric Survey and Future Research Directions

As the 5G technology is going to be deployed soon, so the research on the 5G antennas as a part of communication devices becomes an important aspect. One of the important components of the 5G communication system is an antenna that is essential for the transmission and reception of the 5G signals. The international telecommunication union (ITU) has provided different specifications for the 5G communication system. The 5G antenna should operate at frequency range 1 and 2 (FR1 and FR2) specified by the ITU. The proliferation of various 5G antenna designs is surveyed in this bibliometric paper. The bibliometric survey aims to throw light on several types of antenna employed in various 5G applications like smartphone, base stations, and the IoT based devices that support 5G communications. The Scopus database from January 2015 to 14th October 2020 is used to perform this bibliometric survey on 5G antennas. This paper also presents various future breakthroughs in 5G applications

A Bibliometric Survey on Ultra Wideband Multiple Input Multiple Output Antenna with Improved Isolation

Ultra wideband (UWB) technology remains a viable choice for very high speed data communication in future applications involving large bandwidth. For boosting the data communication efficiency and to mitigate the multipath fading issue faced by UWB system with existing narrowband systems, Multiple Input Multiple Output (MIMO) antenna system is used along with UWB. Mutual coupling which must be smaller in value plays a vital role in deciding the efficiency of MIMO antenna and hence it becomes as important aspect. The mutual coupling reduction techniques of various UWB MIMO antennas are surveyed in this bibliometric paper. The bibliometric survey aims to enlighten different types of mutual coupling reduction technique employed in various MIMO antenna like Neutralization lines, Electromagnetic Bandgap Structure, Defected Ground Structures, etc. that support UWB applications. The Scopus database from January 2015 to 16thDecember 2020 is used to perform this bibliometric survey on UWB MIMO antennas

Pattern recognition in the landscape of seemingly random chimeric transcripts

The molecular and functional diversity generated by chimeric transcripts (CTs) that are derived from two genes is indicated to contribute to tumor cell survival. Several gaps yet exist. The present research is a systematic study of the spectrum of CTs identified in RNA sequencing datasets of 160 ovarian cancer samples in the The Cancer Genome Atlas (TCGA) (https://portal.gdc.cancer.gov). Structural annotation revealed complexities emerging from chromosomal localization of partner genes, differential splicing and inclusion of regulatory, untranslated regions. Identification of phenotype-specific associations further resolved a dynamically modulated mesenchymal signature during transformation. On an evolutionary background, protein-coding CTs were indicated to be highly conserved, while non-coding CTs may have evolved more recently. We also realized that the current premise postulating structural alterations or neighbouring gene readthrough generating CTs is not valid in instances wherein the parental genes are genomically distanced. In addressing this lacuna, we identified the essentiality of specific spatiotemporal arrangements mediated gene proximities in 3D space for the generation of CTs. All these features together suggest non-random mechanisms towards increasing the molecular diversity in a cell through chimera formation either in parallel or with cross-talks with the indigenous regulatory network