'a well known issue' is a correct and usable phrase in written English.
You can use it to describe a problem or situation that is widely recognized or understood, such as deforestation or climate change. For example: Deforestation has become a well known issue in the past few decades, with governments and activists around the world attempting to educate people about its damaging effects.
After all, the lack of permanent academic positions is a well known issue, with the research body Vitae, reporting that as few as 10% of research staff will obtain a permanent academic contract.
Variability of thermo-mechanical properties within a composite part is a well known issue.
Solid particle erosion (SPE) degradation of components in aircraft operating in harsh environments is a well known issue causing severe maintenance and reliability problems.
Conclusions: CPR and CA remain a well known issue among teenager population in Barcelona, as long as being an interesting topic.
Among the phenomena reducing the power of these analysis, phenocopy hampers very seriously the investigation of complex diseases, a well known issue in neurological disorders [29], [30], cancer [31], and likely of primary importance in the study of human ageing [32].
This is a well known issue, relating to the definition of psychiatric disorders [ 18]: are such definitions intended to help clinicians in their choice of an optimal treatment?
The most well known issue on coal remains that of Australia's BHP Billington's leasehold on 350,000 hectares of land in Central Kalimantan.
We propose a new approach to addressing well known issues challenging identification of any patent effect: firm heterogeneity, simultaneity between firm performance and patenting, and sample selection.
Roberts et al., suggest that even in a high stakes integrated assessment, consisting of written and objective structured clinical examinations (OSCE), well known issues of reliability suggest a more pragmatic 68% confidence (single SEM) around the pass/fail score should suffice where re-assessment is offered [ 37].
Energy management and related energy savings in industry sector are well known issues as various legislative acts and standards have been adopted in recent years in Italy (Directive 2006/32/EC on energy end-use efficiency and energy services adopted in Italy by D. Lgs. n. 115/08; Directive 2012/27/CE on energy efficiency, not yet adopted in Italy).
Then we talk about the well known issues such as generalization capability, overfitting (overtraining) issue, or about the local minima issue of MLPs that makes proper training of NNs, especially for nonstationary data such as lung motion, a nontrivial issue.
