78 research outputs found
Mass Media Discourse: Representation of the WAR Concept in the Context of “9/11” Culture Time
In the present article, which is based on the modern English-language publicistic writing, specific features of mass media discourse development in terms of culture time "Before 9/11" and "After 9/11" are revealed. The authors show the influence of a certain cultural context on the formation of concept clusters and subcultures leading to WAR concept transformation in certain period. Using the methods of analyzing the word definitions representing the concept, contextual analysis, analysis of conceptual metaphors, discourse and culture time, the authors make conclusion that in the context of culture time "After 9/11" mass media discourse reflects direct protest against leveling the concept of war and sport discourse dramatization: perception of mass media discourse in general is determined by the participation of "protesting" journalists in the group categorization; discourse as a semiotic medium can be characterized by its overall intentionality – the mind is focused on the route of evil, on fighting terrorism and revenge; cumulative metaphorical proposition of the text is represented by means of protest metaphors SPORT IS NOT WAR, WORDS ARE NOT WEAPONS, LANGUAGE IS NOT BATTLEFIELD, WAR IS NOT SPORT. It has been proved that their ontological realization (SOMETHING IS NOT WAR) can change the studied concept in the new culture time "After 9/11"
Integrating indigenous and exogenous communication channels and capabilities through community-based armyworm forecasting
Many development interventions have failed to generate the desired
impact among African resource-poor farmers for reasons including the
centralised and top-down approach, lack of active community
participation, and over-reliance on external information and technology
delivery strategies and channels. The migrant African armyworm,
Spodoptera exempta, is among the major challenges threatening
livelihoods of millions of farmers in East and Southern Africa.
Outbreaks occur suddenly and can devastate crops and pasture. National
and regional forecasting services have been operational since the 1960s
to provide warning of potential outbreaks. This system relies on
information from armyworm moth traps usually operated at district
level. These centralised services have a number of difficulties and
limitations which include: delays in communicating trap catch data to
the forecaster; forecasts are not village specific; forecasts do not
reach many farmers; lack of responsibility and local ownership of
traps. An innovative approach called community-based armyworm
forecasting (CBAF) was developed as a response to these limitations.
The new approach has been piloted and tested in several East African
countries and found to be effective. CBAF establishes a system that
allows each village to have its own traps and trained forecasters who
collect and interpret data, and provide village specific forecasts. A
recent project on CBAF piloted the approach in 10, 5 and 39 villages of
Malawi, Zimbabwe and Tanzania, respectively, in the 1 st year, and in a
further 25 and 38 villages of Malawi and Tanzania in the 2 nd year.
Discussion with stakeholders, field observations and assessments
conducted by the authors indicate that the initiative has generated a
number of benefits. It built local capacity, and because of the
location specific early warning it enabled farmers to combat the pest
more effectively. It was noticed by the authors that local
communication channels and folk media play an important role in CBAF,
complementing and enhancing the effectiveness of exogenous channels.
This paper discusses how CBAF makes effective use of different
communication channels and capabilities, and highlights preliminary
results.Tant d\u2019interventions de d\ue9veloppement n\u2019ont pas pu
g\ue9n\ue9rer un impact satisfaisant parmi les fermiers africains
sans resources pour de raisons multiples, dont l\u2019utilisation de
l\u2019approche coercitive et centralis\ue9e, le manque d\u2019une
participation active de la communaut\ue9 et le fait d\u2019avoir
plus d\u2019attachement aux informations, aux strat\ue9gies et
guides externes de vulgarization de technologies. Spodoptera exempta,
une chenille aussi nomm\ue9e \u201cchenille africain
migratrice\u201d est parmi les contraintes majeures aux moyens de
subsistance de milliers de fermiers d\u2019Afrique orientale et
australe. Son \ue9ruption est soudaine et peut d\ue9vaster des
cultures ainsi que des pasturages. Les services nationaux et
r\ue9gionaux de pr\ue9diction \ue9taient op\ue9rationnels
depuis 1960 pour fournir des alertes sur des irruptions potentielles
sur base d\u2019informations collect\ue9es sur des pi\ue8ges
tendus aux chenilles au niveau du district. Ces services
centralis\ue9s pr\ue9sentent un bon nombre de difficult\ue9s et
limitations entre autre, le retard dans la communication des
donn\ue9es de pi\ue8ges au pr\ue9visioniste, le manqu\ue9 de
sp\ue9cificit\ue9 des pr\ue9visions, la lenteur dans la livraison
des pr\ue9visions aux fermiers, le manque de responsabilit\ue9 et
d\u2019appropriation locale de ces pi\ue8ges. En r\ue9ponse \ue0
ces limitations, une approche innovatrice appell\ue9e pr\ue9diction
des chenilles au niveau communautaire (CBAF) \ue9tait initi\ue9e et
test\ue9e dans plusieurs pays d\u2019Afrique de l\u2019Est. Cette
approche s\u2019\ue9tait av\ue9r\ue9e efficace \ue0 point
qu\u2019il avait permis \ue0 chaque village d\u2019avoir ses
propres pi\ue8ges et des pr\ue9visionistes form\ue9s pour la
collecte et l\u2019interpr\ue9tation des donn\ue9es ainsi que pour
fournir des pr\ue9visions sp\ue9cifiques aux villages.Un projet
recent sur CBAF avait ex\ue9cut\ue9 cette approche dans 10, 5 et 39
villages de Malawi, Zimbabwe et Tanzanie, respectivement, dans la
premi\ue8re ann\ue9e, et dans plus de 25 et 38 villages de Malawi
et Tanzanie au cours de la deuxi\ue8me ann\ue9e. Des r\ue9unions
avec des partenaires ainsi que des observations et \ue9valuations sur
terrain par des auteurs indiquent combien l\u2019initiative avait
\ue9t\ue9 b\ue9n\ue9fique. Le renforcement de capacit\ue9
locale avait \ue9t\ue9 realis\ue9 et les alertes localement
sp\ue9cifiques ont permis aux fermiers de combattre avec plus
d\u2019efficacit\ue9 la peste. Il \ue9tait remarqu\ue9 que les
cha\ueenes de communication locale ansi que les \u201cfolk
media\u201d jouent un role important dans CBAF par leur
compl\ue9mentarit\ue9 et la promotion de l\u2019efficacit\ue9
des cha\ueenes exog\ue8nes. Cet article discute comment CBAF fait
bon usage de diff\ue9rentes cha\ueenes de communication et
comp\ue9tences, et met en \ue9vidence les r\ue9sultats
pr\ue9liminaires
Larvicidal effects of endophytic and basidiomycete fungus extracts on Aedes and Anopheles larvae (Diptera, Culicidae)
Introduction In vitro bioassays were performed to access the larvicidal activity of crude extracts from the endophytic fungus Pestalotiopsis virgulata (Melanconiales, Amphisphaeriaceae) and the saprophytic fungus Pycnoporus sanguineus (Basidiomycetes, Polyporaceae) against the mosquitoes Aedes aegypti and Anopheles nuneztovari. Methods The extracts were tested at concentrations of 100, 200, 300, 400 and 500ppm. Ethyl acetate mycelia (EAM) extracts and liquid culture media (LCM) from Pe. virgulata and Py. sanguineus were tested against third instar larvae of Ae. aegypti and An. nuneztovari. Results The larvicidal activity of the EAM extracts from Pe. virgulata against Ae. aegypti had an LC50=101.8ppm, and the extract from the basidiomycete fungus Py. sanguineus had an LC50=156.8ppm against the Ae. aegypti larvae. The Pe. virgulata extract had an LC50=16.3ppm against the An. nuneztovari larvae, and the Py. sanguineus extract had an LC50=87.2ppm against these larvae. Conclusions These results highlight the larvicidal effect of EAM extracts from the endophyte Pe. virgulata against the two larval mosquitoes tested. Thus, Pe. virgulata and Py. sanguineus have the potential for the production of bioactive substances against larvae of these two tropical disease vectors, with An. nuneztovari being more susceptible to these extracts
- …