scholarly journals U-Slot Patch Antenna using Space Reduction Optimization

Wireless communications has been created in the modern world particularly during micro-strip patch antenna. The future development of the individual Communication devices will expect to give images, speech and data information at any time. In this work, the structure and presentation of a co-axial feed Uslot micro-strip antenna for 24.7GHz WLAN application is obtainable. The return loss and VSWR of these proposed methods are studying and analysing to using Simulation Technology of patch to enhance the transformation of antenna. In this proposed method is higher impedance of space reduction optimisation. The impact of the use of different search space creation strategies used. The methods were exhibited for the design space reduction. Various tables, graphs showing these comparisons with detailed analysis have been included in this paper.

2021 ◽  
Vol 9 (1) ◽  
pp. 486-492
Author(s):  
K. Mahendran, Dr. R. Gayathri

In modern world, communication devices need to be operated for more than one frequency bands. Lot of research works were carried out in the field of multiband antennas. The one major concern in the design of multiband patch antenna are the gain and bandwidth. Both gain and bandwidth of the multi band antenna can be improved for the better performance. In this paper a triangular multiband antenna is designed and the gain of the antenna is enhanced by the blend of reactive impedance surface and Frequency selective surface. The proposed antenna resonates 3.4 GHz, 4.2 GHz, 6.75 GHz,7.1 GHz, 7.5 GHz and 9.3 GHz with a better return loss and gain.


2016 ◽  
Vol 12 (2) ◽  
pp. 225
Author(s):  
Fatima Falih Ahmed Al-Badrani ◽  
Abdullah Fawaz Al-Badarneh

The twentieth century was one of change and unrest. What characterises the age is that society, up to a high degree, was hostile to spiritual life. The spiritual values seemed to be neglected or totally abandoned for the material, more matter-of-fact values. This left society in a state of increasing confusion that was substantially realised in the outbreak of World War I. The impact of the war revealed the degeneration of the modern world with the breakdown of religion and moral and spiritual traditions. T. S. Eliot was fully aware of the ills of modern civilisation that surrounded people with a number of faiths established haphazardly to fight against the troubles of modern life. These faiths refer to political and social ideologies, parties, and allegiances. Eliot finds that all modern ideologies are poor and futile substitutions for religious faith. He finds that society should be built not upon power and its corruption, but upon a higher system of values which are mainly spiritual and moral. This research paper demonstrates how Eliot's Four Quartets affirms the possibility of spiritual regeneration and gives a positive projection of hope. The central theme of the poem is that if the heart of the individual is ever to be at rest, if his/her tormented apprehension about the transience of human life is ever to be calmed, it will be so when he/she accepts the conviction that humans’ peace is in God's will.


Author(s):  
Manickam Karthigai Pandian ◽  
Thangam Chinnadurai

Background: Modern communication devices are very much dependent on the operation of low profile antennas. The objective of this paper is to perform the design and simulation of a rectangular microstrip patch antenna at a resonant frequency of 9.5 GHz. Methods: Design of the antenna is given with various substrates like FR4, Teflon and Ceramic substrates at the desired frequency. For each substrate, the performance of the antenna is measured in terms of its return loss and Voltage Standing Wave Ratio (VSWR). Results: Ansoft High-Frequency Structure Simulator is used to simulate the antenna characteristics. Conclusion: Performance characteristics of the antenna with three different substrates are compared to identify the substrate that provides the accurate return loss and VSWR.


2014 ◽  
Vol 92 (7) ◽  
pp. 591-601 ◽  
Author(s):  
Pierre U. Blier ◽  
Hélène Lemieux ◽  
Nicolas Pichaud

Changes in environmental temperature can pose considerable challenges to animals and shifts in thermal habitat have been shown to be a major force driving species’ adaptation. These adaptations have been the focus of major research efforts to determine the physiological or metabolic constraints related to temperature and to reveal the phenotypic characters that can or should adjust. Considering the current consensus on climate change, the focus of research will likely shift to questioning whether ectothermic organisms will be able to survive future modifications of their thermal niches. Organisms can adjust to temperature changes through physiological plasticity (e.g., acclimation), genetic adaptation, or via dispersal to more suitable thermal habitats. Thus, it is important to understand what genetic and phenotypic attributes—at the individual, population, and species levels—could improve survival success. These issues are particularly important for ectotherms, which are in thermal equilibrium with the surrounding environment. To start addressing these queries, we should consider what physiological or metabolic functions are responsible for the impact of temperature on organisms. Some recent developments indicate that mitochondria are key metabolic structures determining the thermal range that an organism can tolerate. The catalytic capacity of mitochondria is highly sensitive to thermal variation and therefore should partly dictate the temperature dependence of biological functions. Mitochondria contain a complex network of different enzymatic reaction pathways that interact synergistically. The precise regulation of both adenosine triphosphate (ATP) and reactive oxygen species (ROS) production depends on the integration of different enzymes and pathways. Here, we examine the temperature dependence of different parts of mitochondrial pathways and evaluate the evolutionary challenges that need to be overcome to ensure mitochondrial adaptations to new thermal environments.


2021 ◽  
Author(s):  
Swagata Sarkar ◽  
Sivakami Nagappan ◽  
Shafin Kadhir Badhusha

Millimetre Wave frequencies (30–300 GHz) can be used for different major applications of modern world like telecommunications, security screening, imaging, automotive radars, military applications, remote sensing, radio astronomy and many more. The internationally reserved frequency spectrum is used for Radio Frequency Energy. In this work 64 GHz antennas are compared with different design and a comparative study is taken. In this work Microstrip patch antenna with carpet architecture, and fractal island are designed and compared. The general comparative parameters for antenna are directivity, gain, return loss, bandwidth, specific absorption rate etc. After the comparison, it is found that return loss gave better result for carpet design at 64 GHz compare to fractal island design.


2021 ◽  
pp. 64-73
Author(s):  
Юрий Семенович Исаченко ◽  
Алексей Анатольевич Прядехо ◽  
Александр Павлович Тонких

Процесс воспитания и становления личности на современном этапе развития общества необходимо рассматривать в совокупности всех общественных процессов, которые неразрывно связаны в своем взаимосуществовании. Нежелание или неспособность субъектов социальных отношений видеть в личности абсолютную цель любого социального взаимодействия активизирует первоначальное противоречие между свободой и необходимостью, проявляющееся внешне в конфликте между индивидуумами в социальном конфликте. Его преодолевает приверженность моральному долгу и уважение к социальным нормам. Секрет ориентации на такого рода отношения достаточно прост: современный образовательный процесс – это феномен социальной культуры, который можно представить как процесс культурного образования или процесс личной инкультуры. В современном социуме был сформирован положительный стереотип школьной жизни: учитель соответствовал образу самого уважаемого человека – за его знания, мудрость, доброту и другие личностные качества. Этому способствовало как общество в целом (в первую очередь государственная пропаганда, в которой учителю отводилась главенствующая роль), так и конкретные педагогические работники. Люди четко представляли цель своей жизни и способы ее достижения. Причем эти способы не отражались негативом своего достижения на окружающих. В работе анализируется влияние средств массовой информации, кинематографа, эстрады на состояние воспитанности подрастающего поколения, выявлены последствия воздействия современного медиаресурса на формирование поведения и самосознания подрастающего поколения в современном мире. The process of education and formation of the individual at the present stage of development of society must be considered in the totality of all social processes that are inextricably linked in their mutual existence. The unwillingness or inability of the subjects of social relations to see in the individual the absolute goal of any social interaction activates the initial contradiction between freedom and necessity, which manifests itself externally in a conflict between individuals in a social conflict. It is overcome by a commitment to moral duty and respect for social norms. The secret of orientation to this kind of relationship is quite simple: the modern educational process is a phenomenon of social culture, which can be represented as a process of cultural education or a process of personal inculturation. In modern society, a positive stereotype of school life was formed: the teacher corresponded to the image of the most respected person – for his knowledge, wisdom, kindness and other personal qualities. This was facilitated both by society as a whole (first of all, by state propaganda, in which the teacher was given a dominant role), and by specific teaching staff. People had a clear idea of the purpose of their life and how to achieve it. Moreover, these methods were not reflected by the negative of their achievement on others. The paper analyzes the influence of mass media, cinema, pop music on the state of upbringing of the younger generation, reveals the consequences of the impact of modern media resources on the formation of behavior and self-consciousness of the younger generation in the modern world.


Classics ◽  
2017 ◽  
Author(s):  
Fiona Macintosh

The impact of ancient Greek and Roman dance on modern dance has been perceptible since at least the 15th century. While classical reception in dance is now recognized as a sub-category within dance studies and a serious dimension to classical performance reception, previously this interrelationship, if acknowledged at all, was generally discussed in terms of modern dance’s regular dependence on Greco-Roman myth for its subject matter rather than with reference to any systematic formal links. However, with the recent interest in ancient pantomime scholarly attention has been given to the ancient origins of modern ballet, ballet d’action, which in the first decades of the 18th century took its cues from Roman pantomime. In the first decade of the 18th century, the synthesis of the arts began to unravel and dance was no longer allied to opera or spoken theatrical entertainment. It now had to find its own genealogy and Aristotle’s idea of dance as mimetic action, combined with treatises on Roman pantomime (itself a direct descendent of Greek tragedy), provided the theoretical underpinning for the 18th-century ballets d’action. Dance was to follow the ancients in having something important to say; and Greek tragic drama was realized in 18th-century danced drama without the aid of either speech or (unlike ancient pantomime) song. By the last quarter of the 18th century, ballet had acquired sufficient status to become a high cultural art form sui generis; and it had done so with the ancient example as both guide and legitimizing authority. Ballet, like other performance arts, depends very much on its genealogy: not least because its major stars very often belong to dancing dynasties. Ballet continued to look back to antiquity, but with the decline in the status of the dancer in the 19th century the links with antiquity were often deliberately suppressed. However, by the end of the century, and especially following Nietzsche’s The Birth of Tragedy out of the Spirit of Music (1872), where the singing/dancing chorus was restored to discussions on tragedy, Greek dance finally began to attract attention among scholars and artists alike. The aim of this bibliography is to trace this perceived, occasionally actual and tactical, but very often suppressed, debt to ancient dance in the modern world from the 15th century down to the present day, focusing on the individual dancer, dancing collectivities, and their relationship to scholarship.


Author(s):  
Khalid Ali Khan ◽  
Suleyman Malikmyradovich Nokerov

This study aims to optimize a fan-stub slot patch to get better suitability and performance for Citizens Broadband Radio Service (CBRS). The transition from the tedious configuration of slotted patch antenna in fan-stub shape is evaluated. Also, the impact of stub width W, stub length L, and its orientation are tested. Multiple simulation tests ensure the uniqueness in the type of slots or stubs that affect the multiband nature of patch. The optimization of basic fan-stub structure on return loss S11, Voltage Standing Wave Ratio (VSWR), and the operating band at the desired frequency is performed to accommodate the federal and non-federal use of the band. The simulation results show that the designed antenna is technically suitable to cover 4G LTE in CBRS (LTE-43 and LTE-48 band) as well as 5.5 GHz Wireless Local Area Network (WLAN) band of operation.


Author(s):  
László Bognár ◽  
Tibor Fauszt ◽  
Mariann Váraljai

In today’s modern world, the pace of technological development can be con-sidered exponential. Education must constantly adapt to this dynamic devel-opment. It must be able to innovate, to use modern tools and methods that are effectively integrated into the learning process. Education should provide an appropriate learning environment to meet changing needs, one way of which is e-learning. This environment can be an excellent support for the learning process; however, it will hardly be effective without developing the right student learning attitude. The e-learning environment gives freedom and independence to the individual, at the same time. For the learner's individual endeavor to be successfully completed as expected, control and continuous feedback are needed. One way to do this is through self-quizzing. Self-quizzes, divided into units, related to the learning material, with appropriate difficulty and amount, can help to understand and engrave the processed material, and thus improve the effectiveness of learning. Self-quizzes create the opportunity for imme-diate feedback, which is a very important feature of an e-learning environ-ment. According to many scientific research, immediate feedback can greatly help maintain interest and motivation, and quizzes are suitable tools for this purpose. In our research, we sought to answer the question of how the continuous, self-monitoring practice opportunity provided by online quizzes affects stu-dent achievement. In the case of an online course held at the University of Dunaújváros in 2019, we examined whether students who continuously per-form self-quizzes will be more effective by the end of the learning process than their peers who are less receptive to independent self-quizzing. We also addressed the effect of the nature of time spent on self-reflexive quizzing on learning success.


Author(s):  
Аnna Khaleeva

The article defines terms on mental health and emotional well-being of adolescents and adolescents, and outlines major trends in mental health and emotional well-being of young people over the past decades. The aim of the article is to highlight and establish the importance of emotional and subjective well-being in adolescence and youth, to identify their further influence on the formation of the personality and its full life. Adolescence is seen as a critical period of development with long-term effects on the health and well-being of the individual. It is stated that the central factor in the health and well-being of adolescents is the interaction of young people with their environment, with people and attitudes in their daily lives. The most important determinants of adolescents' health are in their environment, as well as the choices and opportunities for improving the health or adverse behaviors of today's society. Factors that influence on the subjective and emotional well-being (sleep deprivation, increased stress, social relationships, the impact of violence) have been taken into account. The components and characteristics that support emotional and subjective well-being are identified, such as: self-esteem, motivation, stability, self-efficacy, hope and optimism, while high levels of anxiety, depression and stress can interfere with emotional health and well-being. In determining the factors that affect the emotional and subjective well-being of adolescents and youths, it is important to take into account the multidimensional nature of well-being and what sources and factors form it. The main sources affecting the sense of self and overall well-being of a person in adolescence and youth are family, community, peers, school environment and teachers. The modern world and the environment of human development are constantly changing, which has a significant impact on the well-being of the individual and its further development. Such changes are important elements for the continued successful interaction of adolescents and young people and their integration in society.


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