Contact effects in Gunn diodes

1971 ◽  
Vol 7 (24) ◽  
pp. 711 ◽  
Author(s):  
W.S.C. Gurney
Keyword(s):  
Gunn Diodes ◽  
Contact Effects

InP Gunn Diodes with Current Limiting Contact for High Efficiency Gunn Oscillators

2010 ◽  
Vol E93-C (5) ◽  
pp. 585-589
Author(s):  
Mi-Ra KIM ◽  
Jin-Koo RHEE ◽  
Chang-Woo LEE ◽  
Yeon-Sik CHAE ◽  
Jae-Hyun CHOI ◽  
...  
Keyword(s):  
High Efficiency ◽  
Gunn Diodes ◽  
Current Limiting ◽  
Gunn Oscillators

PROSPECTS FOR USING GUNN DIODES BASED ON GaN, AlN AND InN

2012 ◽  
Vol 71 (8) ◽  
pp. 717-727
Author(s):  
I. P. Storozhenko ◽  
Yu. V. Arkusha
Keyword(s):  
Gunn Diodes

scholarly journals Prospects of botanical pesticides in management of Iroko gall bug, Phytolyma fusca (Hemiptera, Psylloidea) under laboratory and field conditions

2021 ◽  
Vol 82 (1) ◽  
Author(s):  
Juliana Amaka Ugwu
Keyword(s):  
West Africa ◽  
Azadirachta Indica ◽  
Residual Effects ◽  
Aqueous Extracts ◽  
Plant Materials ◽  
Piper Guineense ◽  
Early Management ◽  
Ethanol Extracts ◽  
Milicia Excelsa ◽  
Contact Effects

Abstract Background Iroko gall bug, Phytolyma fusca Walker, is a major insect pest of Milicia excelsa (Iroko) seedling hampering its propagation in West Africa. Milicia excelsa is an indigenous forest timber tree in the tropical rain forest of West Africa with a very high value in international trade due to its wood quality. Sustainable management of P. fusca infestations on Iroko seedlings have not been achieved due to their cryptic nature and multivoltine generations. This study evaluated the residual and contact effects of crude ethanol and aqueous extracts of four plants (Azadirachta indica, Jatropha curcas, Piper guineense, and Aframomum melegueta) on adult P. fusca in the laboratory and field. Results All the extracts had residual effects and contact effects on adult insects in the laboratory at 75% and 100% concentrations of applications. Azadirachta indica, P. guineense, and A. melegueta gave 80–100% adult mortality at both concentrations in the laboratory; their efficacies were comparable to cypermethrin. The ethanol extracts of P. guineense and A. indica were more effective than other extracts in protecting the seedlings against Phytolyma infestations in the field. They significantly (p < 0.01) reduced infestation compared to other extracts and control. Ethanol extracts of the tested plant materials were more effective than their aqueous extracts both in the laboratory and field. Conclusion The results proved that P. guineense and A. indica extracts were very potent and promising in protecting Milicia excelsa seedlings against Phytolyma fusca infestations and they can be used in the early management of Phytolyma infestations in the field.

The generalization of intergroup contact effects: Emerging research, policy relevance, and future directions

2021 ◽  
Author(s):  
Jessica Boin ◽  
Mirjana Rupar ◽  
Sylvie Graf ◽  
Sybille Neji ◽  
Olivia Spiegler ◽  
...  
Keyword(s):  
Research Policy ◽  
Intergroup Contact ◽  
Future Directions ◽  
Policy Relevance ◽  
Contact Effects

Bilingualism and sound change: perception in the /ʎ/-/j/ merger process in Majorcan Spanish

2020 ◽  
Vol 136 (1) ◽  
pp. 106-133
Author(s):  
Assumpció Rost Bagudanch
Keyword(s):  
Language Contact ◽  
Sound Change ◽  
Balearic Islands ◽  
Chance Level ◽  
Control Group ◽  
Inhibiting Effect ◽  
Change Perception ◽  
Merger Process ◽  
Linguistic Behaviour ◽  
Contact Effects

AbstractYeísmo has been accounted for as a merger process occurring in Spanish irrespective of language contact effects though some scholars have claimed that the interference between Spanish and the variety of Catalan spoken in Majorca (Balearic Islands, Spain) has an inhibiting effect on yeísmo. This paper focusses on whether this inhibiting effect can be demonstrated at the perception level and whether it has an effect in the linguistic behaviour of bilinguals. To examine these effects, we conducted an identification experiment with three groups of listeners (Majorcan Catalan-dominant bilinguals, Spanish-dominant bilinguals and a control group of Spanish monolinguals). Results show that Catalan dominants do recognise [ʎ] stimuli, but Spanish dominants only identify [ʎ] at chance level. Consequently, it would seem that bilingual subjects display a bimodal performance at the perception level.

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