The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform

E Barren - One of the best experts on this subject based on the ideXlab platform.

  • Rapid surface sampling and Archival Record system (RSSAR)
    1997
    Co-Authors: E Barren, A.a. Bracco, S.b. Dorn
    Abstract:

    Purpose is to develop a rapid surface (concrete, steel) contamination measurement system that will provide a ``quick-look`` indication of contamination areas, an Archival Record, and an automated analysis. A bulk sampling oven is also being developed. The sampling device consists of a sampling head, a quick look detector, and an archiving system (sorbent tube). The head thermally desorbs semi-volatiles, such as PCBs, oils, etc., from concrete and steel surfaces; the volatilized materials are passed through a quick-look detector. Sensitivity of the detector can be attenuated for various contaminant levels. Volatilized materials are trapped in a tube filled with adsorbent. The tubes are housed in a magazine which also archives information about sampling conditions. Analysis of the tubes can be done at a later date. The concrete sampling head is fitted with a tungsten-halogen lamp; in laboratory experiments it has extracted model contaminants by heating the top 4mm of the surface to 250 C within 100-200 s. The steel sampling head has been tested on different types of steels and has extracted model contaminants within 30 s. A mathematical model of heat and mass transport in concrete has been developed. Rate of contaminant removal is at maximum when the moisture content is about 100 kg/m{sup 3}. The system will be useful during decontamination and decommissioning operations.

  • Rapid surface sampling and Archival Record (RSSAR) system
    1996
    Co-Authors: E Barren, S.b. Dorn, A.l. Ortiz, C.m. Penney, R.b. Sheldon, A.p. Shapiro, A.a. Bracco
    Abstract:

    Purpose is to develop a rapid surface contamination measurement system that will provide a ``quick-look`` indication of contaminated areas, an Archival Record, and an automated analysis of that Record. By providing rapid analysis and a large number of accurate measurements of surface and subsurface contamination, the cost of remediation of large industrial sites will be dramatically lowered by reducing both characterization time and the material fraction that must be remediated. The RSSAR system is capable of sampling a variety of surfaces for semivolatile organic contaminants. The sampling is rapid (one sample per 100 sec). The system comprises thermal sampler heads, a ``quick-look`` module, and Archival multisample trapping module.

  • Rapid surface sampling and Archival Record system
    1995
    Co-Authors: E Barren, C.m. Penney, D.r. Berdahl, R.b. Sheldon
    Abstract:

    A number of contamination sites exist in this country where the area and volume of material to be remediated is very large, approaching or exceeding 10{sup 6} M{sup 2} and 10{sup 6} M{sup 3}. Typically, only a small fraction of this material is actually contaminated. In such cases there is a strong economic motivation to test the material with a sufficient density of measurements to identify which portions are uncontaminated, so extensively they be left in place or be disposed of as uncontaminated waste. Unfortunately, since contamination often varies rapidly from position to position, this procedure can involve upwards of one million measurements per site. The situation is complicated further in many cases by the difficulties of sampling porous surfaces, such as concrete. For example, on concrete the standard wipe test provides results that are strongly operator- and surface condition-dependent. The results are not usually available real time, because the wipe samples are sent to a remote laboratory for analysis, entailing a delay of days to weeks between sampling and results. Further, the cost of analysis of a clean sample is usually the same as that of a contaminated sample; analysis of clean samples thereby increases the total analysis costs considerably. Another method for surface/sub surface characterization is to obtain a boring or a drilling. This method also involves the off-site analysis of the drilled material, incorporating the time and economic penalties described above. Other disadvantages of drilling techniques are disfiguration of the surface and distribution of contamination through byproduct dust. It is for the above reasons that we have chosen to develop thermal sampling methods for characterization of concrete, transite, and contaminated bulk debris. The sampling system we describe has been designed to greatly reduce the economic penalty posed by these difficulties.

Alicia Chilcott - One of the best experts on this subject based on the ideXlab platform.

  • Towards protocols for describing racially offensive language in UK public archives
    Archival Science, 2019
    Co-Authors: Alicia Chilcott
    Abstract:

    The UK’s history of colonialism has resulted in an Archival Record that includes evidence of ethnically diverse populations and examples of racialised oppression. Government Records created within this legacy present people of colour through a colonial lens, often adopting racist language. Taking inspiration from Australian and North American protocols for the culturally sensitive management of archives documenting indigenous communities and considering the effectiveness of existing common descriptive practice in the UK, some initial recommendations for appropriate descriptive practice are made. These are offered in a tiered format of ‘good, better, best’ practice, responsive to widespread resource constraints in the UK public archive sector. It is hoped that considering the practicable steps that can be taken to decolonise Archival descriptive practices can contribute towards broader transformations in the sector. Please note that this article contains terms that may upset or offend readers; these have been included only where necessary for illustrative purposes and are denoted with inverted commas.

A.a. Bracco - One of the best experts on this subject based on the ideXlab platform.

  • Rapid surface sampling and Archival Record system (RSSAR)
    1997
    Co-Authors: E Barren, A.a. Bracco, S.b. Dorn
    Abstract:

    Purpose is to develop a rapid surface (concrete, steel) contamination measurement system that will provide a ``quick-look`` indication of contamination areas, an Archival Record, and an automated analysis. A bulk sampling oven is also being developed. The sampling device consists of a sampling head, a quick look detector, and an archiving system (sorbent tube). The head thermally desorbs semi-volatiles, such as PCBs, oils, etc., from concrete and steel surfaces; the volatilized materials are passed through a quick-look detector. Sensitivity of the detector can be attenuated for various contaminant levels. Volatilized materials are trapped in a tube filled with adsorbent. The tubes are housed in a magazine which also archives information about sampling conditions. Analysis of the tubes can be done at a later date. The concrete sampling head is fitted with a tungsten-halogen lamp; in laboratory experiments it has extracted model contaminants by heating the top 4mm of the surface to 250 C within 100-200 s. The steel sampling head has been tested on different types of steels and has extracted model contaminants within 30 s. A mathematical model of heat and mass transport in concrete has been developed. Rate of contaminant removal is at maximum when the moisture content is about 100 kg/m{sup 3}. The system will be useful during decontamination and decommissioning operations.

  • Rapid surface sampling and Archival Record (RSSAR) system
    1996
    Co-Authors: E Barren, S.b. Dorn, A.l. Ortiz, C.m. Penney, R.b. Sheldon, A.p. Shapiro, A.a. Bracco
    Abstract:

    Purpose is to develop a rapid surface contamination measurement system that will provide a ``quick-look`` indication of contaminated areas, an Archival Record, and an automated analysis of that Record. By providing rapid analysis and a large number of accurate measurements of surface and subsurface contamination, the cost of remediation of large industrial sites will be dramatically lowered by reducing both characterization time and the material fraction that must be remediated. The RSSAR system is capable of sampling a variety of surfaces for semivolatile organic contaminants. The sampling is rapid (one sample per 100 sec). The system comprises thermal sampler heads, a ``quick-look`` module, and Archival multisample trapping module.

Tsai Chin-chung - One of the best experts on this subject based on the ideXlab platform.

S.b. Dorn - One of the best experts on this subject based on the ideXlab platform.

  • Rapid surface sampling and Archival Record system (RSSAR)
    1997
    Co-Authors: E Barren, A.a. Bracco, S.b. Dorn
    Abstract:

    Purpose is to develop a rapid surface (concrete, steel) contamination measurement system that will provide a ``quick-look`` indication of contamination areas, an Archival Record, and an automated analysis. A bulk sampling oven is also being developed. The sampling device consists of a sampling head, a quick look detector, and an archiving system (sorbent tube). The head thermally desorbs semi-volatiles, such as PCBs, oils, etc., from concrete and steel surfaces; the volatilized materials are passed through a quick-look detector. Sensitivity of the detector can be attenuated for various contaminant levels. Volatilized materials are trapped in a tube filled with adsorbent. The tubes are housed in a magazine which also archives information about sampling conditions. Analysis of the tubes can be done at a later date. The concrete sampling head is fitted with a tungsten-halogen lamp; in laboratory experiments it has extracted model contaminants by heating the top 4mm of the surface to 250 C within 100-200 s. The steel sampling head has been tested on different types of steels and has extracted model contaminants within 30 s. A mathematical model of heat and mass transport in concrete has been developed. Rate of contaminant removal is at maximum when the moisture content is about 100 kg/m{sup 3}. The system will be useful during decontamination and decommissioning operations.

  • Rapid surface sampling and Archival Record (RSSAR) system
    1996
    Co-Authors: E Barren, S.b. Dorn, A.l. Ortiz, C.m. Penney, R.b. Sheldon, A.p. Shapiro, A.a. Bracco
    Abstract:

    Purpose is to develop a rapid surface contamination measurement system that will provide a ``quick-look`` indication of contaminated areas, an Archival Record, and an automated analysis of that Record. By providing rapid analysis and a large number of accurate measurements of surface and subsurface contamination, the cost of remediation of large industrial sites will be dramatically lowered by reducing both characterization time and the material fraction that must be remediated. The RSSAR system is capable of sampling a variety of surfaces for semivolatile organic contaminants. The sampling is rapid (one sample per 100 sec). The system comprises thermal sampler heads, a ``quick-look`` module, and Archival multisample trapping module.