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Traditional thin-section analysis techniques such as tedious manual point counting are time consuming and require numerous measures. The use of visual estimation charts produce results of questionable accuracy.

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In the interest of saving as much historic fabric as possible and not altering or scarring historic materials as a result of investigative probes, architectural conservators look to nondestructive testing methods for the evaluation and identification of materials, conditions and alterations made to structures over time.

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Documentation is central to every preservation project whether it involves recording the presence of a structure about to be lost or preparing evidence for restoring or maintaining existing structures.

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Prehistoric Hopewellian peoples of Ohio (ca. 150 B.C. – A.D. 400) produced fine geometric and representational art that played central roles in their social organization and religious practices.

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The difficulty of imposing building and fire codes on historic buildings has been a subject of wide spread concern in recent decades.

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Phase 1 of this project used electrochemical characterization methods to evaluate coatings’ corrosion protective performance under conditions that directly emulated exposure to polluted atmospheres.

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This report discusses the feasibility and processes necessary to utilize photogrammetric techniques and photogrammetric software in order to be able to gather metric data from softcopy three-dimensional images.

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Visual inspection of the Chapel indicated that lateral movements, meteoric and ground water, and soluble salts are the main causes of deterioration of the Chapel’s facade and walls.

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NAPAP researchers exposed limestone and marble briquettes to weathering for months to years at several different sites. They sampled the briquettes and analyzed multiple layers for anion content.

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