scholarly journals Virtual schools

2011 ◽  
Vol 1 (4) ◽  
pp. 19-27 ◽  
Author(s):  
Çiğdem Apaydın

The purpose of this article is to examine the concept of virtual schools in the scope of distance education based on a literature review. The virtual school is that the students have distance education by using online computers. The virtual school is named as a "out of school" model and these schools are administered that students complete their studies from their homes by online computers and they interact with their teachers distantly. The main purpose of the virtual schools is to provide access to citizens who cannot have education due to some reasons. Virtual schools were launched in the United States of America for the first time and then they have spread to other countries. Virtual schools operate as professional institutions which have curriculums and teachers. In this review following topics are examined: distance education; development of distance education; virtual school; types of virtual schools; positive and negative sides of the virtual school; virtual school system; organization types in virtual schools; the points to be considered about virtual schools.

2008 ◽  
Vol 9 (1) ◽  
pp. 42 ◽  
Author(s):  
Rayapati A. Naidu ◽  
Gandhi Karthikeyan

The ornamental Chinese wisteria (Wisteria sinensis) is a woody perennial grown for its flowering habit in home gardens and landscape settings. In this brief, the occurrence of Wisteria vein mosaic virus (WVMV) was reported for the first time in Chinese wisteria in the United States of America. Accepted for publication 18 June 2008. Published 18 August 2008.


Fractals ◽  
2020 ◽  
Vol 28 (07) ◽  
pp. 2150023
Author(s):  
HAMIDREZA NAMAZI ◽  
ONDREJ KREJCAR ◽  
ABDULHAMIT SUBASI

SARS-CoV-2 is a deadly virus that has affected human life since late 2019. Between all the countries that have reported the cases of patients with SARS-CoV-2 disease (COVID-19), the United States of America has the highest number of infected people and mortality rate. Since different states in the USA reported different numbers of patients and also death cases, analyzing the difference of SARS-CoV-2 between these states has great importance. Since the generated RNA walk from the SARS-CoV-2 genome includes complex random fluctuations that also contain information, in this study, we employ the complexity and information theories to investigate the variations of SARS-CoV-2 genome between different states in the USA for the first time. The results of our analysis showed that the fractal dimension and Shannon entropy of genome walk significantly change between different states. Based on these results, we can conclude that the SARS-CoV-2 genomic structure significantly changes between different states, which is resulted from the virus evolution. Therefore, developing a vaccine for SARS-CoV-2 is very challenging since it should be able to fight various structures of the virus in different states.


Author(s):  
Martin P. Botha

INTRODUCTIONThe name, Manie van Rensburg, is virtually unknown in Europe and the United States of America. Recently, some of his work was screened at a South African film festival in Amsterdam at the Kriterion cinema and I had the honour to present a lecture there on 7 October 1995 regarding Van Rensburg and his presence in the cinema. His film work was also highlighted in a small retrospective during October 1996 at the Vrije Universiteit Brussel. IT WAS NOT THE FIRST TIME a Van Rensburg film was screened outside the borders of South Africa. During the 1980s Van Rensburg received an International Film Festival of New York award for his historical TV drama series, Heroes, and a Merit Award from the London Film Festival was given to him for his filmed play, The Native who Caused all the Trouble. His mammoth production, The Fourth...


2009 ◽  
pp. 167-180
Author(s):  
Aihwa Ong

- The outsourcing of work is today, for the American middle class, cause of a real obsession. The middle-class, for the first time, fears, from a point of view of working, of being left to drift. The author of this essay tells the complex, and far from obvious, dynamics of purchase of labor between the United States of America and the great new emerging powers (India and China, first of all) in the knowledge economy.


Crackup ◽  
2021 ◽  
pp. 1-11
Author(s):  
Samuel L. Popkin

In 2016, a businessman so discredited that he could no longer get a casino license or borrow money from an American bank was elected president of the United States of America. How did this happen? It is easy to mock and ridicule Donald Trump as if he is the problem. In fact, he is a symptom of a much larger issue that has been bedeviling the GOP for nearly two decades: an intraparty crackup of massive proportions. “Crackup” here refers to a breakdown of the fragile alliances between coalitions within a party that prevents its leaders from developing goals they can deliver on when they control the White House and majorities in the House and Senate. This introductory chapter explains why party crackups are inevitable in a federal system with national money and local primaries. But this is the first time—for either party—that no group within the party could create a synthesis of old orthodoxies and new realities that altered the party’s direction enough to build a new consensus. The straw that broke the elephant’s back is the unintended—yet predictable—consequence of changes in campaign finance (popularly known as the McCain-Feingold bill) and the Supreme Court’s Citizens United ruling. These changes limited the party of legislative leaders to reach intraparty consensus and bargain with the other party. The combination has stripped the parties of most of their power to enforce any collective responsibility on their legislative colleagues, or upon a president from their own party.


Author(s):  
Catherine Ward ◽  
Clint-Michael Reneau

This chapter outlines first-time leadership characteristics demonstrated by Mae Jemison, the first Black female astronaut in the United States of America, to highlight the qualities and characteristics needed to be a successful first-time leader. These characteristics are qualities leaders can identify within themselves, develop, and implement in their daily practice. This book chapter explores 1) the ability to identify and define a personal vision, 2) having a sense of purpose, 3) vulnerability and the willingness to take risks, 4) courage, and 5) ultimately, how leadership is about seeing and valuing the gifts and talents of others and the ability to truly connect with others to fulfill a greater purpose.


2020 ◽  
Vol 6 (1) ◽  
pp. 117-124
Author(s):  
Saadat Hassan ◽  
Shahid Hussain Bukhari

The Financial Action Task Force (FATF) has become a modern diplomatic instrument for the United States of America to use it the way it wants for. As the U.S. led Afghan peace process embraced the victory, Washington, Afghan Taliban and Kabul government have agreed upon limited ceasefire and withdrawal of troops from Afghanistan soil. Pakistani authorities are equally ready to cease the movement, amid the challenges posed by the FATF, by facilitating U.S.-Taliban peace deal in Qatar on Feb 29, 2020, the biggest development happened ever in South Asian region. It happened for the first time of grinding warfare since the U.S. invasion in 2001 which is considered to be a vital step to end the insurgency altogether in the region. Pentagon finally accepted Islamabad’s stance that there is no military solution to the Afghan imbroglio. Pakistani authorities, through Afghan authorities, are said to be taking over Pakistani Taliban purportedly operating from Afghanistan.  After playing a key role in brokering the said peace deal, the challenge of FATF as a diplomatic tool to pile up pressure on Islamabad to mold its role in favour of the US and the Taliban talks.


2019 ◽  
Author(s):  
Isobel Ronai ◽  
Danielle M. Tufts ◽  
Maria A. Diuk-Wasser

AbstractThe Asian longhorned tick (Haemaphysalis longicornis) was reported for the first time in the United States of America in 2017 and has now spread across 12 states. The potential of this invasive tick vector to transmit pathogens will be determined through its association to native hosts, such as the white-footed mouse (Peromyscus leucopus) which is the primary reservoir for the causative agent of Lyme disease (Borrelia burgdorferi) and other zoonotic pathogens. We placed larval H. longicornis on P. leucopus, 65% of the larvae (n = 40) moved off the host within a short period of time and none engorged. In contrast, larval black-legged ticks (Ixodes scapularis) did not move from where they were placed in the ear of the mouse. We then conducted a laboratory behavioural assay to assess the interaction of H. longicornis with the hair of potential mammalian host species in the United States of America. H. longicornis larvae were less likely to enter the hair zone of P. leucopus and humans compared to the hair of domestic cats, domestic dogs, and white-tailed deer. Our study identifies a tick-host hair interaction behaviour, which can be quantified in a laboratory assay to predict tick-host associations and provides insights into how ticks select a host.


Author(s):  
Thomas M. Onuferko

The cleptoparasitic bee genus Epeolus Latreille, 1802 is for the first time reviewed for species occurring in the Caribbean, Central America and Mexico, and a single dichotomous identification key to the females and males of species present or likely to be present in these regions is presented. A total of 25 species have been confirmed as present across the region, although another 10 likely occur south of the Mexico–United States border. Three species are newly described—E. hanusiae sp. nov., E. nomadiformis sp. nov. and E. odyneroides sp. nov.—and redescriptions are provided for species occurring exclusively south of the United States of America (species occurring north of Mexico were recently revised elsewhere) except E. danieli (Genaro, 2014) comb. nov., which was recently described. One subspecies is elevated to species level (E. obscuripes Cockerell, 1917 stat. nov.). The following five names are newly synonymized under those of four valid species: Trophocleptria schraderi Michener, 1954 syn. nov. under E. boliviensis Friese, 1908, Tro. odontothorax Michener, 1954 syn. nov. under E. claripennis Friese, 1908, E. rugosus Cockerell, 1949 syn. nov. and E. xanthurus Cockerell, 1917 syn. nov. under E. luteipennis Friese, 1916, and E. schmidti Friese, 1925 syn. nov. under E. obscuripes. A diagnosis is provided for the presumably monophyletic and almost entirely Neotropical species group originally regarded as a separate genus, Trophocleptria Holmberg, 1886. Differential diagnoses accompany the descriptions / redescriptions of Neotropical species of Epeolus, and known collection records and information about their ecology are presented.


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