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in a piece of carborundum ( SiC ) crystal , by H.J. Round in 1907.1 Commercial research into light - emitting diode ( LED ) technology started in the early 1960s , when Nick Holonyak , Jr. , created the first inorganic LED in 1962.2,3 Work on gallium arsenide phosphide ( GaAsP ) led to the introduction of the first mass - produced commercial 655-nm red LEDs in 1968 , by Hewlett - Packard and Monsanto(passive) was first discoveredThe electroluminescence ( EL ) phenomenon
the heating of the Pacific Ocean waters , which peak around December 25th near Peru(passive) is caused byThe phenomenon of El Niño
a warming of the Pacific Ocean(passive) is caused byThe phenomenon El Niño
ch Electro - Luminescent , of Californiato createPhenomenon EL
the variations ... the sea surfaceprovokeEl Niño phenomenon
winds blowing from the South ( Patagonia ) up to the Amazon(passive) caused bythe “ El friaje ” phenomenon
a current ... the first electrode ( anode ) 106 and the second electrode ( cathode ) 150 , the current flows in the luminescent layer 108to causean EL phenomenon
Mental health 0800causesel ni?o phenomenon
higher Vddcausingovershock phenomenon
a drought crisis(passive) caused bya drought crisis
widespread drought which places many areas at risk of wild fireshas causedwidespread drought which places many areas at risk of wild fires
meteorological drought to as much as 85 percent of the Philippines by April this year ... affecting 68 provinceswill ... causemeteorological drought to as much as 85 percent of the Philippines by April this year ... affecting 68 provinces
a single season(passive) set bya single season
dry conditions(passive) caused bydry conditions
the sea to be warm again in the following monthscausesthe sea to be warm again in the following months
serious humanitarian needs such as food shortage and malnutrition(passive) caused byserious humanitarian needs such as food shortage and malnutrition
2015 - 2016(passive) caused by2015 - 2016
extreme climatic conditions(passive) caused byextreme climatic conditions
possible flooding damages(passive) caused bypossible flooding damages
agricultural losses(passive) caused byagricultural losses
the constant natural disasters(passive) caused bythe constant natural disasters