The phrase 'improved and unimproved' is correct and usable in written English.
You can use it to refer to things that have been improved or not improved. For example, "The company has seen vast improvements in efficiency with the introduction of new technology, both improved and unimproved processes benefitting from the change.
The enhancement of the capability of the improved structure to resist interfacial fracture was validated by comparison between the improved and unimproved structures for their fracture responses.
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We used the change scores among improved and unimproved patients to calculate Guyatt's responsiveness ratio for each functional scale [ 26].
Both the improved and unimproved water sources showed a range of levels of fecal contamination, although a higher proportion of improved water sources had concentrations classified at lower risk levels.
However, within the shunted group, they were unable to differentiate improved and unimproved patients based on either amplitude or latency of the pulse wave; one other study found similar results [ 127].
In each village, improved and unimproved community water sources (as defined by the World Health Organization/ United Nations Childrens Fund Joint Monitoring Program for Water Supply and Sanitation) were sampled, and hand rinses (HRs) and SDW in homes with a child under age five were collected.
The key features of the approach adopted here were, the use of pairwise comparisons of five improved and five unimproved streets across London, a holistic analytical framework to represent the complexity of urban streets, and the use of diverse qualitative and quantitative data to understand the diverse forms of value that might accrue from interventions.
This shows sanitation practices in greater detail, enabling experts to highlight trends in using improved, shared and unimproved sanitation facilities and the trend in open defecation.
Given that there is no evidence that proton beam is superior to other therapies in terms of prostate cancer control, it might be an improved (and more costly) means to an unimproved end.
Descriptive statistics on mode of facility construction, type of structure (improved or unimproved) and use modalities (free shared use, or pay per use) were collected from respondents.
The spatial distribution of wells by type (improved versus unimproved) and fecal coliform counts are shown in Figure 4. Significant spatial clustering of fecal coliform-positive wells was observed using the LISA statistic, with clusters of high counts apparent in older urban areas north of Leogane city center as well as the rural areas south of Gressier and west of Leogane.
