The phrase 'area by which' is grammatically correct and can be used in written English.
It is used to refer to a specific region or area in which something is happening or a particular area that is being discussed. For example: "The network coverage in the area by which the concert was held caused significant problems for attendees who were trying to stream the event."
In apocalyptic language, the OECD warned this week of the consequences of what it called a major negative event emerging from the euro area, by which it means a chaotic breakup of the euro.
Chorionic villi make up a significant portion of the placenta and serve primarily to increase the surface area by which products from the maternal blood are made available to the fetus.
The first agent of German imperialism was Carl Peters, who, with Count Joachim von Pfeil and Karl Juhlke, evaded the sultan of Zanzibar late in 1884 to land on the mainland and made a number of "contracts" in the Usambara area by which several chiefs were said to have surrendered their territory to him.
In addition, the optimum collector area by which the system has the maximum life-cycle savings and solar fraction was obtained.
As the allowable leakage area by which this test passes is small, the containment leakage rate test is crucial not only for periodic but also for pre-operational tests.
In the past two decades, people with disabilities have overcome exclusion and shame to close the gap in nearly every area by which we measure social progress, from poverty and employment to health, education, housing, and computer access.
The process of acculturation is commonly divided into four distinct areas by which individuals undergoing this process are categorized (Berry 1980; Sam and Berry 2010; Sam and Eide 1991; Tilburg and Vingerhoets 2005).
The new and control surface structures were equally divided among the implantation areas, by which two out of six implantation areas in each goat were not used.
Taconic Opera, accordingly, uses area artists, by which Mr. Montez means "singers who can drive home after a rehearsal or performance".
But the chopper flies much more slowly when mapping an area by air, which for now is one of its most useful functions, Dr. Amidi said.
The Positive Likelihood Ratio was 3.0 (IC: 1.1-7.5) and the Negative Likelihood Ratio was 0. Once the study was completed, the core group made a careful review of the results area by area which revealed that, in spite of the previous information provided to experts, their ratings were not based on efficiency but on adequacy of the small health areas.
