scholarly journals Some Recent Developments of Microstrip Antenna

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Liu ◽  
Li-Ming Si ◽  
Meng Wei ◽  
Pixian Yan ◽  
Pengfei Yang ◽  
...  

Although the microstrip antenna has been extensively studied in the past few decades as one of the standard planar antennas, it still has a huge potential for further developments. The paper suggests three areas for further research based on our previous works on microstrip antenna elements and arrays. One is exploring the variety of microstrip antenna topologies to meet the desired requirement such as ultrawide band (UWB), high gain, miniaturization, circular polarization, multipolarized, and so on. Another is to apply microstrip antenna to form composite antenna which is more potent than the individual antenna. The last is growing towards highly integration of antenna/array and feeding network or operating at relatively high frequencies, like sub-millimeter wave or terahertz (THz) wave regime, by using the advanced machining techniques. To support our points of view, some examples of antennas developed in our group are presented and discussed.

Cancers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 3036
Author(s):  
Efisio Puxeddu ◽  
Giovanni Tallini ◽  
Roberta Vanni

The incidence of thyroid cancer has increased over the past 3 to 4 decades. Nonetheless, the mortality from thyroid cancer has remained stable. The thyroid gland may develop nodules encompassing several types of cell proliferation, from frankly benign to very aggressive forms with many intermediate challenging variants. For this reason, there is growing interest in evaluating thyroid nodules from many points of view, from the clinical to the molecular aspects, in the search for innovative diagnostic and prognostic parameters. The aim of this Special Issue was to provide an overview of recent developments in understanding the biology and molecular oncology of thyroid tumors of follicular cell derivation and their repercussions on the diagnosis, prognosis, and therapy. The contributions of many experts in the field made up a Special Issue of Cancers journal, that focusing on different aspects, including mechanistic and functional facets, gives the status of art of clinical and biological perspectives of thyroid cancer.


Author(s):  
Tat’iana S. Volchetskaia ◽  
Tatyana K. Primak

Scientific research of contractual relationships represents not only an interesting aspect of learning about the past of human civilization, but also a necessary component of the creation and improvement of new forms of state-public structures. This component implies consent as a basic element of the interaction system. But many questions remain insufficiently researched for the following reasons: the dominant view on the contract as subordinate in relation to the state and law; the lack of integrity of positions on the origin and composition of the elements that determine the contract’s nature. To get new ideas and perspectives of study it is necessary to reconsider traditional points of view on the emergence of norms, exchange, individualism, property, to use new approaches, especially anthropological one. Based on scientific research, the authors concluded that the agreement (contract) appeared simultaneously with the emergence of the human community; the agreement (contract) does not need to be recognized by the state, it can be considered as a natural regulator of social relations. The general and private levels were identified in the process of forming the contract, and there were indicated contracts’ features, components and the principle of interaction through the individual person


Healthcare ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 49 ◽  
Author(s):  
Bas C. Stunnenberg ◽  
Jaap Deinum ◽  
Tom Nijenhuis ◽  
Frans Huysmans ◽  
Gert Jan van der Wilt ◽  
...  

N-of-1 trials can provide high-class evidence on drug treatment effectiveness at the individual patient level and have been given renewed interest over the past decade due to improvements of the initial single patient design. Despite these recent developments, there is still no consensus under what circumstances N-of-1 trials should be considered as part of evidence-based clinical care and when they represent medical research with need for institutional review board (IRB) approval. This lack of consensus forms an obstacle for a more widespread implementation of N-of-1 trials. Based upon the existing literature, we as a group of researchers involved in N-of-1 trials and members of the IRB of a tertiary academic referral center, designed a practical flowchart based on an ethical framework to help make this distinction. The ethical framework together with a practical flowchart are presented in this communication.


1998 ◽  
Vol 43 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Ginette Comtois ◽  
Christiane Morin ◽  
Alain Lesage ◽  
Pierre Lalonde ◽  
Elena Likavc̆anova ◽  
...  

Objective: A group of 47 young adults suffering from schizophrenia was interviewed to garner their views on their needs for care. Method: Three members of a specialized multidisciplinary rehabilitation team, who had been caring for these patients, on average, for the past 4 years, completed a questionnaire to assess the needs for care of these individuals. Patient and staff assessments were then compared. Results: Patients and staff do not share similar views on the presence of clinical and social problems. Further analyses of the perceived importance of living-skills deficits, the perceived difficulties in dealing with these, and the recent developments in rehabilitation practices challenge whether patient-staff consensus is indeed essential for rehabilitation. Conclusion: We propose that staff should listen to patients' points of view more carefully, especially in the areas of work, studies, and independent living.


2019 ◽  
Vol 15 (2) ◽  
pp. 327-352 ◽  
Author(s):  
Laura G. E. Smith ◽  
Leda Blackwood ◽  
Emma F. Thomas

The past decade has witnessed burgeoning efforts among governments to prevent people from developing a commitment to violent extremism (conceived of as a process of radicalization). These interventions acknowledge the importance of group processes yet in practice primarily focus on the idiosyncratic personal vulnerabilities that lead people to engage in violence. This conceptualization is problematic because it disconnects the individual from the group and fails to adequately address the role of group processes in radicalization. To address this shortcoming, we propose a genuinely social psychological account of radicalization as an alternative. We draw on recent developments in theory and research in psychological science to suggest that radicalization is fundamentally a group socialization process through which people develop identification with a set of norms—that may be violent or nonviolent—through situated social interactions that leverage their shared perceptions and experiences. Our alternative provides a way of understanding shifts toward violent extremism that are caused by both the content (focal topics) and process of social interactions. This means that people’s radicalization to violence is inseparable from the social context in which their social interactions take place.


2016 ◽  
Vol 15 (1) ◽  
pp. 1
Author(s):  
Saifuddin . ◽  
Wardani . ◽  
Dzikri Nirwana

The development of tariqat in Indonesia is historically and sociologically related to the climate and culture of the people who in the past was formed by rural culture. However, in recent developments, in South Kalimantan for example, the assumption is very different. Although, this tariqat is usually described as traditional, backward, and associated with the countryside, it is not entirely true. With its tradisional nature, the tariqat become attractions for scholars. Those with rational thingkings entering this world with diverse motivations. There are two complementary sides. On the one hand, rational intellectuals/scholars enter into the tariqat and give a new baseline. On the other hand, the members of the tariqat also renew themselves. Motivations that drive the interest to this tariqat are doctrinal, rational, moral, and psychological. This motivation does not stand alone; it is intertwined and supports each other, in the internalization of the tariqat into the consciousness of the individual.


2018 ◽  
pp. 22-30
Author(s):  
Yahiea Al Naiemy ◽  
Taha Elwi ◽  
Lajos Nagy ◽  
Thomas Zwick

In this paper, an Electromagnetic Band Gap (EBG) lens of a single layer is invented to improve the gain of a truncated slotted square patch antenna for the Wi-Fi applications. The proposed EBG lens is structured from 55 planar array. The individual unit cell is basically shaped as a couple of a split concave conductive patch. The proposed EBG struc- ture performance is tested numerically using Finite Integration Technique (FIT) formulations of CSTMWS and analytically using circuit theory. Then, the antenna performance in terms of |S11|, the boresight gain, and radiation patterns are reported and compared to the performance before introducing the EBG lens to identify the significant enhancements. The proposed EBG antenna is simulated numerically inside FIT formulations of CSTMWS time domain (TD) solver. A significant gain enhancement of 11.1 dBi at 2.45 GHz and a front to back ratio (F/B) about 22 dB are achieved after introducing the EBG lens. The antenna performance is validated using a frequency domain (FD) solver based CSTMWS formulations to obtain excellent agreements between the two invoked methods.


1988 ◽  
Vol 27 (1) ◽  
pp. 81-83
Author(s):  
Nadeem A. Burney

Its been long recognized that various economies of the world are interlinked through international trade. The experience of the past several years, however, has demonstrated that this economic interdependence is far greater than was previously realized. In this context, the importance of international economic theory as an area distinct from general economics hardly needs any mentioning. What gives international economic theory this distinction is international markets for some goods and effects of national sovereignty on the character of economic activity. Wilfred Ethier's book, which incorporates recent developments in the field, is an excellent addition to textbooks on international economics for one- or twosemester undergraduate courses. The book mostly covers standard topics. A distinguishing feature of this book is its detailed analysis of the flexible exchange rates and a discussion of the various approaches used for their determination. Within each chapter, the author has extensively used facts, figures and major events to clarify the concepts in the light of the theoretical framework. The book also discusses, in a fair amount of detail, the existing international monetary system and the role of various international organizations.


Author(s):  
Mikhail Konstantinov

The aim of the article is to concretize the concept of political ideology in the aspect of its matrix structure and in the context of the cognitive-evolutionary approach. Based on Michael Frieden's morphological approach to the analysis of ideological consciousness, the concept of cognitive-ideological matrices is introduced, which allows us to describe the process of transition from proto-ideological to ideological concepts proper, especially at the level of individual consciousness. The identification of the ideological concept as the main “gene” of conceptual variability and inheritance made it possible to describe the main parameters of the evolution of political ideologies and associate it with changes taking place at the individual consciousness level. The described concept was tested in a series of sociological studies of youth consciousness conducted in 2015-2016 and 2018-2020. As a result of the study, it was possible to first identify the “zero level” of ideology, at which the minds of young respondents are potentially open to the influence of diverse and often mutually exclusive ideological orientations, and second, to pinpoint the changes that have occurred in the cognitive ideological matrices of Rostov-on-Don students over the past five years. This study was conducted by scientists from the southern Federal University.


2019 ◽  
pp. 451-458
Author(s):  
Peter W. Rein

Developments in the technology of production of sugar from sugarcane tend to be incremental improvements in an effort to reduce costs and boost revenue. Nonetheless the developments are significant and contribute to sustainable sugarcane enterprises. Some technologies have adapted to changing environmental conditions, and more attention is being given to boosting revenue through associated activities, particularly in enhancing the potential for sugarcane operations to exploit the energy value of sugarcane. This paper outlines recent developments of interest in processing sugarcane.


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