'input are necessary' is correct and can be used in written English.
For example, "In order to make an informed decision, input from all stakeholders are necessary."
In addition, the domain connectivity procedures are completely automated such that no user intervention or manual input is necessary.
Consequently, a comparatively large energy input is necessary to promote the non-rapid frictional shear flow in powder handling practice.
To ensure biofuel development is sustainable and does not negatively affect ecosystem services, stakeholder input is necessary to identify sensitive and meaningful indicators.
This specific power input is necessary in order to achieve kLa values sufficiently high to satisfy the oxygen demand of the cells and control of dO2.
In the planning of the urban green infrastructure, this input is necessary for understanding how residents experience and value their living environment.
The study confirms that cognitive methods are much more suited for EFL learners in the learning of polysemous phrasal verbs and appropriate L1 input is necessary when a new teaching method is introduced.
From the neural coding point of view, characterizing the dependence of different aspects of network activity upon the external input is necessary to understand and quantify how different aspects of network activity take part in the encoding of external stimuli [50 53].
He was silent for large parts of committee meetings, but would contribute enthusiastically on the occasions he felt his input was necessary.
It means that the circadian input is necessary for maintaining circadian plasticity of dendrites also in LD conditions.
We tested the hypothesis that the tonic excitatory input is necessary for directional responses in SBACs by blocking the tonic glutamatergic input, which should dissipate the dendritic voltage gradient proposed by Hausselt et al. [13].
