scholarly journals Valley current generation using biased bilayer graphene dots

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
Fionnuala Solomon ◽  
Stephen R. Power
1997 ◽  
Vol 161 ◽  
pp. 711-717 ◽  
Author(s):  
John W. Dreher ◽  
D. Kent Cullers

AbstractWe develop a figure of merit for SETI observations which is anexplicitfunction of the EIRP of the transmitters, which allows us to treat sky surveys and targeted searches on the same footing. For each EIRP, we calculate the product of terms measuring the number of stars within detection range, the range of frequencies searched, and the number of independent observations for each star. For a given set of SETI observations, the result is a graph of merit versus transmitter EIRP. We apply this technique to several completed and ongoing SETI programs. The results provide a quantitative confirmation of the expected qualitative difference between sky surveys and targeted searches: the Project Phoenix targeted search is good for finding transmitters in the 109to 1014W range, while the sky surveys do their best at higher powers. Current generation optical SETI is not yet competitive with microwave SETI.


2020 ◽  
Vol 11 (1) ◽  
pp. 62-66
Author(s):  
Krasimira Dimitrova ◽  

The current generation is facing a number of challenges related to their future. The education system is looking for adequate ways to change and adaptively focus the learning process. The application of a competency approach in education has a positive effect. The article attempts to explain the essence of the competency approach and its projections in the preparation, education and upbringing of children and students. Basic elements that are leading in organizing the learning process are outlined. Concepts necessary for subsequent theoretical research and methodological formulations are defined.


2020 ◽  
Author(s):  
JUNAIDI

Indonesia has many fighters who a’im to free them selves from the heroes who are willing to sacrifice peace, and freedom from invaders from other countries, so that the shock makes the physical revolutionary figure seize, fight or peace, led by one of the brave leaders Brigadier General Haji Hassan Basry. Hassan Basry from South Kalimantan. Struggling to defend the position of independence, based on the influence of Dutch troops. The Kalimantan Chief General led a deception that the Dutch could not know, so the attack was successful. Success is expressed and introduced through learning so that one forms the patriotism of the archipelago based on, attitudes, character embodied in the values of struggle, which are developed in the younger generation through education. Thus education builds the character contained in it, influences the meaning of life, in the nature of the daily habits of the younger generation, through direct or indirect moral messages, thereby slowly forming the traits to further uphold the nation formed by younger roles, current generation and later.


2021 ◽  
Vol 880 ◽  
pp. 114883
Author(s):  
Alex Elías-Zúñiga ◽  
Luis Manuel Palacios-Pineda ◽  
Isaac H. Jiménez-Cedeño ◽  
Oscar Martínez-Romero ◽  
Daniel Olvera-Trejo

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuan Da Liao ◽  
Jian Kang ◽  
Clara N. Breiø ◽  
Xiao Yan Xu ◽  
Han-Qing Wu ◽  
...  

2021 ◽  
Author(s):  
Polona Caserman ◽  
Augusto Garcia-Agundez ◽  
Alvar Gámez Zerban ◽  
Stefan Göbel

AbstractCybersickness (CS) is a term used to refer to symptoms, such as nausea, headache, and dizziness that users experience during or after virtual reality immersion. Initially discovered in flight simulators, commercial virtual reality (VR) head-mounted displays (HMD) of the current generation also seem to cause CS, albeit in a different manner and severity. The goal of this work is to summarize recent literature on CS with modern HMDs, to determine the specificities and profile of immersive VR-caused CS, and to provide an outlook for future research areas. A systematic review was performed on the databases IEEE Xplore, PubMed, ACM, and Scopus from 2013 to 2019 and 49 publications were selected. A summarized text states how different VR HMDs impact CS, how the nature of movement in VR HMDs contributes to CS, and how we can use biosensors to detect CS. The results of the meta-analysis show that although current-generation VR HMDs cause significantly less CS ($$p<0.001$$ p < 0.001 ), some symptoms remain as intense. Further results show that the nature of movement and, in particular, sensory mismatch as well as perceived motion have been the leading cause of CS. We suggest an outlook on future research, including the use of galvanic skin response to evaluate CS in combination with the golden standard (Simulator Sickness Questionnaire, SSQ) as well as an update on the subjective evaluation scores of the SSQ.


2021 ◽  
Vol 103 (24) ◽  
Author(s):  
Rui Lyu ◽  
Zachary Tuchfeld ◽  
Nishchhal Verma ◽  
Haidong Tian ◽  
Kenji Watanabe ◽  
...  

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