The phrase "a useful and efficient" is correct and usable in written English.
You can use it to describe something that is both practical and effective in achieving its purpose.
Example: "The new software is a useful and efficient tool for managing our projects."
Alternatives: "a practical and effective" or "a beneficial and productive".
We demonstrate that with its Web-metaphor, adherence to OWL recommendations and key unique features, such as Collaborative Annotation using Annotea, Swoop acts as a useful and efficient Web Ontology development tool.
Furthermore, the article at hand demonstrates that the use of the WebGIS GMO monitoring is a useful and efficient tool to assess the individual and spatial risk potential before and during GMO release since it can be used to identify coexistence problems between Bt-maize and conventional maize cultivation on the one hand and between Bt-maize cultivation and conservation issues on the other hand.
The ability to use different predictors and filters to search qualified MTIs, the rich output results, and the use pre-computed results should make imiRTP a useful and efficient resource for the plant research community.
Well known methods from various fields have been combined to create a useful and efficient tool chain.
The KL expansion serves as a useful and efficient tool for discretizing second-order stochastic processes with known covariance function.
We find a useful and efficient function to prove the existence of a stationary distribution for the SDE (4) based on a result from Khasminskii [13].
More generally, our computational model should prove a useful, and computationally efficient, tool in studying the dynamics and energetics of protein-interface interactions.
This is a useful and cost-efficient method to extract maximal information from the given experiment condition [ 15].
The EVB approach (which has been discussed in detail elsewhere [52,120]) has proven to be a highly useful and efficient approach in a number of studies [28,51,99,118,119,121], as it is fast enough to provide both extensive conformational sampling and provides sufficient chemical information to describe chemical processes under study.
Self-reports can be a very useful and efficient means for studying aberrant driving behavior.
Water Quality Index (WQI) is a very useful and efficient method for assessing the suitability of water quality.
