Recent advances in metamaterials for simultaneous wireless information and power transmission

In the last two decades, metamaterials and metasurfaces have introduced many new electromagnetic (EM) theory concepts and inspired contemporary design methodologies for EM devices and systems. This review focuses on the recent advances in metamaterials (MMs) for simultaneous wireless information and power transmission (SWIPT) technology. In the increasingly complex EM world, digital coding and programmable metamaterials and metasurfaces have enabled commercial opportunities with a broad impact on wireless communications and wireless power transfer. In this review, we first introduce the potential technologies for SWIPT. Then, it is followed by a comprehensive survey of various research efforts on metamaterial-based wireless information transmission (WIT), wireless power transmission (WPT), wireless energy harvesting (WEH) and SWIPT technologies. Finally, it is concluded with perspectives on the rapidly growing SWIPT requirement for 6G. This review is expected to provide researchers with insights into the trend and applications of metamaterial-based SWIPT technologies to stimulate future research in this emerging domain.

Trends and Future Research in Electronic Marketing: A Bibliometric Analysis of Twenty Years

Electronic marketing (eM) is a flourishing phenomenon that is gaining intense concern because of a significant impact on organizational performance. Over the past few decades, the relevance of eM has been observed in numerous fields (e.g., consumers, organizational strategy, advertisement, and overall philosophy of management to understand the insights globally). To effectively maneuver the field, all stakeholders, particularly academicians and practitioners, must comprehend the current position of the eM theory and practices for dynamic utilization. A systematic bibliometric analysis can serve this issue by providing a holistic view of the publication trend and its trajectory in terms of various themes, including citations and publication metrics. This study analyzes the bibliometric data from 2000 to 2019 to reveal the most productive countries, universities, authors, journals, and prolific publications in electronic marketing. To this end, VOS viewer software was used to visualize the mapping based on co-citation, bibliographic coupling (BC), and co-occurrence (CC). The primary addition of this research is to provide an overview of eM tendencies and paths that may help researchers know the tendencies and future research directions worldwide.

Double Helix Structure of Photon

Does photon have structure, what structure? A useful clue is: The EM theory predicts that the helical distribution of vector EH plus speed makes the angular momentum of the circular polarized light. Photon possesses speed and spin , weather its spin and other basic properties are also owing to the similar EH structure plus ? We are going to find out the answer. Starting from an ordinary symmetrical EM-wave beam, we do not presuppose it having any relation with the photon and quantization. We will prove the symmetrical wave beam is circular polarized; it is composed of an -energy packet and a conical (EM) wave with much smaller energy. The energy packet is a small and thin slice of circular polarized EH field wrapped by a cylindrical side membrane with helically distributed . Mechanical equilibrium between and stresses in the side membrane and the EH field inside construct a very steady structure to keep its integrity and energy. The energy-packet will be proved having almost all the basic properties we used to know for the photon(s). It floats on the front of the conical (EM) wave. They move with the same phase until meeting an obstacle. The energy packet and accompanying wave satisfy the same circular polarized wave function and play a role together in the processes of emission, absorption and interference. They show wave particle properties all the time. It seems such EM train can be reasonably treated as a photon and vice versa.

PROGRESSION OF THEORY OF ENTREPRENEURIAL MARKETING (EM)

This paper analyses the theory of entrepreneurial marketing (EM), its evolution, and dimensions which are available to measure the EM. The EM theory was developed as an interface between the two major disciplines’ of marketing and entrepreneurship. Researchers, scholars, and academics have been debating and nourishing the theory of EM for thirty-year period. Initially it was considered as an ideal marketing concept and strategy to enrich marketing activities and business performance of small and medium scaled enterprises (SMEs). Today, as consumers, customers and marketers, we are living in one global village and experiencing different types of buying and selling patterns. This digital era facilitates us to experience the globalization and international marketing. So far, the global market is constituted with different types and sizes of business units and those business units together generate ultimate power to handle the market and its rivalry. At present it is being declared as an enthusiastic business development factor to reach progressive levels of business life cycles without considering the size of the business unit. The purpose of this paper is to analyze development of the theory of entrepreneurial marketing based on the past literature. It consists of three parts and basic information is described by the first part. Discussion of the development of EM theory and its dimensions are considered in the second part and the Conclusions of this study are presented in the third section.

A caça ao veado e o erro de Waltz

Os argumentos de Kenneth Waltz em Man, State and War, feitos por analogia à caça ao veado de Rousseau apresentada Discurso Sobre a Origem das Desigualdades Entre os Homens, servem de base para uma teoria que considera que os conflitos internacionais decorrem do fato de os Estados não estarem submetidos a uma autoridade comum com o uso exclusivo da força, bem como para determinar certas características inerentes à relação entre Estados (especialmente o grande potencial conflituoso). Uma teoria como essa é apresentada por ele em Theory of International Relations. Tal teoria é extremamente influente, tendo ajudado a fundar o modelo neo-realista nas relações internacionais. Acredito, entretanto, que os argumentos que tem sua raiz na caça ao veado de Rousseau surgem de uma interpretação equivocada de tal alegoria e que uma interpretação correta mostraria que, tal como ela é descrita por Rousseau, a caça ao veado não serviria de base para os argumentos de Waltz. Mesmo com pequenas alterações, que permitam uma aproximação ao modo como Waltz interpreta a caça ao veado, creio que ela não levaria a uma total independência de teorias que considerem que os conflitos internacionais decorrem do fato de os Estados não estarem submetidos a uma autoridade comum com o uso exclusivo da força e, o que é ainda mais marcante, não levaria a uma consideração tão elevada da ameaça de conflito nas relações internacionais e como tal consideração tem uma influência tão elevada no comportamento dos Estados em tais relações. Palavras-chave: Realismo Político; Rousseau; Kenneth Waltz, Caça ao Veado.