WorldWideScience

Sample records for technology nist traceable

  1. One cubic metre NIST traceable radon test chamber

    International Nuclear Information System (INIS)

    Kotrappa, P.; Stieff, F.

    2008-01-01

    With the availability of the National Inst. of Standards and Technology (NIST) Radon Emanation Standard with a content of ∼5000 Bq of 226 Ra, it is possible to build a flow through a practical radon test chamber. A standard glove box with four gloves and a transfer port is used. Air is pumped through a flow integrator, water jar for humidification and NIST source holder, and into the glove box through a manifold. A derived theoretical expression provides the calculated radon concentration inside the chamber. The calculation includes a derived decay correction due to the large volume and low flow rate of the system. Several calibrated continuous radon monitors and passive integrating electret ion chambers tested in the chamber agreed fairly well with the calculated radon concentrations. The chamber is suitable for handling the calibration of several detectors at the same time. (authors)

  2. Hg0 and HgCl2 Reference Gas Standards: ?NIST Traceability ...

    Science.gov (United States)

    EPA and NIST have collaborated to establish the necessary procedures for establishing the required NIST traceability of commercially-provided Hg0 and HgCl2 reference generators. This presentation will discuss the approach of a joint EPA/NIST study to accurately quantify the true concentrations of Hg0 and HgCl2 reference gases produced from high quality, NIST-traceable, commercial Hg0 and HgCl2 generators. This presentation will also discuss the availability of HCl and Hg0 compressed reference gas standards as a result of EPA's recently approved Alternative Methods 114 and 118. Gaseous elemental mercury (Hg0) and oxidized mercury (HgCl2) reference standards are integral to the use of mercury continuous emissions monitoring systems (Hg CEMS) for regulatory compliance emissions monitoring. However, a quantitative disparity of approximately 7-10% has been observed between commercial Hg0 and HgCl2 reference gases which currently limits the use of (HgCl2) reference gas standards. Resolving this disparity would enable the expanded use of (HgCl2) reference gas standards for regulatory compliance purposes.

  3. Hg0 and HgCl2 Reference Gas Standards: NIST Traceability and Comparability (And EPA ALT Methods for Hg and HCl )

    Science.gov (United States)

    EPA and NIST have collaborated to establish the necessary procedures for establishing the required NIST traceability of commercially-provided Hg0 and HgCl2 reference generators. This presentation will discuss the approach of a joint EPA/NIST study to accurately quantify the tru...

  4. National Institute of Standards and Technology (NIST) cybersecurity risk management framework applied to modern vehicles

    Science.gov (United States)

    2014-10-01

    The primary objective of the work described in this report is to review the National Institute of Science and Technology (NIST) guidelines and foundational publications from an automotive : cybersecurity risk management stand-point. The NIST approach...

  5. UHF RFID technologies for identification and traceability

    CERN Document Server

    Laheurte, Jean-Marc; Paret, Dominique; Loussert, Christophe

    2014-01-01

    UHF Radio Frequency Identification (RFID) is an electronic tagging technology that allows an object, place or person to be automatically identified at a distance without a direct line-of-sight using a radio wave exchange. Applications include inventory tracking, prescription medication tracking and authentication, secure automobile keys, and access control for secure facilities. This book begins with an overview of UHF RFID challenges describing the applications, markets, trades and basic technologies. It follows this by highlighting the main features distinguishing UHF (860MHz-960MHz) and HF

  6. Automatic summary generating technology of vegetable traceability for information sharing

    Science.gov (United States)

    Zhenxuan, Zhang; Minjing, Peng

    2017-06-01

    In order to solve problems of excessive data entries and consequent high costs for data collection in vegetable traceablility for farmers in traceability applications, the automatic summary generating technology of vegetable traceability for information sharing was proposed. The proposed technology is an effective way for farmers to share real-time vegetable planting information in social networking platforms to enhance their brands and obtain more customers. In this research, the influencing factors in the vegetable traceablility for customers were analyzed to establish the sub-indicators and target indicators and propose a computing model based on the collected parameter values of the planted vegetables and standard legal systems on food safety. The proposed standard parameter model involves five steps: accessing database, establishing target indicators, establishing sub-indicators, establishing standard reference model and computing scores of indicators. On the basis of establishing and optimizing the standards of food safety and traceability system, this proposed technology could be accepted by more and more farmers and customers.

  7. Measurement quality assurance for beta particle calibrations at NIST

    International Nuclear Information System (INIS)

    Soares, C.G.; Pruitt, J.S.

    1993-01-01

    Standardized beta-particle fields have been established in an international standard and have been adopted for use in several U.S. dosimeter and instrument testing standards. Calibration methods and measurement quality assurance procedures employed at the National Institute of Standards and Technology (NIST) for beta-particle calibrations in these reference fields are discussed. The calibration facility including the NIST-automated extrapolation ionization chamber is described, and some sample results of calibrations are shown. Methods for establishing and maintaining traceability to NIST of secondary laboratories are discussed. Currently, there are problems in finding a good method for routine testing of traceability to NIST. Some examples of past testing methods are given and solutions to this problem are proposed

  8. Measurement quality assurance for beta particle calibrations at NIST

    Energy Technology Data Exchange (ETDEWEB)

    Soares, C.G.; Pruitt, J.S. [National Institute of Standards and Technology, Gaithersburg, MD (United States)

    1993-12-31

    Standardized beta-particle fields have been established in an international standard and have been adopted for use in several U.S. dosimeter and instrument testing standards. Calibration methods and measurement quality assurance procedures employed at the National Institute of Standards and Technology (NIST) for beta-particle calibrations in these reference fields are discussed. The calibration facility including the NIST-automated extrapolation ionization chamber is described, and some sample results of calibrations are shown. Methods for establishing and maintaining traceability to NIST of secondary laboratories are discussed. Currently, there are problems in finding a good method for routine testing of traceability to NIST. Some examples of past testing methods are given and solutions to this problem are proposed.

  9. Research on Food Safety Traceability Technology Based on Internet of Things

    OpenAIRE

    Qiang Meng; Yongfeng Cui; Hansen Wang; Shijun Li

    2015-01-01

    Relying on the Internet of things platform, building a traceability system ranging from the source to dinner table is the crucial issue of meat products to be solved at the moment. On the basis of knowing the current situation of domestic and international food traceability quo, the passage will put forward the feasibility of mobile query used in food traceability queries, mainly targeting elaborating the core technology like image preprocessing and decoding. It illustrates the feasibility of...

  10. USCEA/NIST measurement assurance programs for the radiopharmaceutical and nuclear power industries

    Energy Technology Data Exchange (ETDEWEB)

    Golas, D.B. [Council for Energy Awareness, Washington, DC (United States)

    1993-12-31

    In cooperation with the U.S. Council for Energy Awareness (USCEA), the National Institute of Standards and Technology (NIST) supervises and administers two measurement assurance programs for radioactivity measurement traceability. One, in existence since the mid 1970s, provides traceability to suppliers of radiochemicals and radiopharmaceuticals, dose calibrators, and nuclear pharmacy services. The second program, begun in 1987, provides traceability to the nuclear power industry for utilities, source suppliers, and service laboratories. Each program is described, and the results of measurements of samples of known, but undisclosed activity, prepared at NIST and measured by the participants are presented.

  11. USCEA/NIST measurement assurance programs for the radiopharmaceutical and nuclear power industries

    International Nuclear Information System (INIS)

    Golas, D.B.

    1993-01-01

    In cooperation with the U.S. Council for Energy Awareness (USCEA), the National Institute of Standards and Technology (NIST) supervises and administers two measurement assurance programs for radioactivity measurement traceability. One, in existence since the mid 1970s, provides traceability to suppliers of radiochemicals and radiopharmaceuticals, dose calibrators, and nuclear pharmacy services. The second program, begun in 1987, provides traceability to the nuclear power industry for utilities, source suppliers, and service laboratories. Each program is described, and the results of measurements of samples of known, but undisclosed activity, prepared at NIST and measured by the participants are presented

  12. Design and implementation of safety traceability system for candied fruits based on two-dimension code technology

    Directory of Open Access Journals (Sweden)

    ZHAO Kun

    2014-12-01

    Full Text Available Traceability is the basic principle of food safety.A food safety traceability system based on QR code and cloud computing technology was introduced in this paper.First of all we introduced the QR code technology and the concept of traceability.And then through the field investigation,we analyzed the traceability process.At the same time,we designed the system and database were found,and the consumer experiencing technology is studied.Finally we expounded the traceability information collection,transmission and final presentation style and expected the future development of traceability system.

  13. Traceability information carriers. The technology backgrounds and consumers' perceptions of the technological solutions

    DEFF Research Database (Denmark)

    Chrysochou, Polymeros; Chryssochoidis, George; Kehagia, Olga

    2009-01-01

    of and confidence in the information provided, perceived levels of convenience, impact on product quality and safety, impact on consumers' health and the environment, and potential consequences on ethical and privacy liberties constitute important factors influencing consumers' perceptions of technologies......The implementation of traceability in the food supply chain has reinforced adoption of technologies with the ability to track forward and trace back product-related information. Based on the premise that these technologies can be used as a means to provide product-related information to consumers...... in their production lines. For the purposes of the study, a focus group study was conducted across 12 European countries, while a set of four different technologies used as a means to provide traceability information to consumers was the focal point of the discussions in each focus group. Results show that the amount...

  14. Traceability information carriers. The technology backgrounds and consumers' perceptions of the technological solutions.

    Science.gov (United States)

    Chrysochou, Polymeros; Chryssochoidis, George; Kehagia, Olga

    2009-12-01

    The implementation of traceability in the food supply chain has reinforced adoption of technologies with the ability to track forward and trace back product-related information. Based on the premise that these technologies can be used as a means to provide product-related information to consumers, this paper explores the perceived benefits and drawbacks of such technologies. The aim is to identify factors that influence consumers' perceptions of such technologies, and furthermore to advise the agri-food business on issues that they should consider prior to the implementation of such technologies in their production lines. For the purposes of the study, a focus group study was conducted across 12 European countries, while a set of four different technologies used as a means to provide traceability information to consumers was the focal point of the discussions in each focus group. Results show that the amount of and confidence in the information provided, perceived levels of convenience, impact on product quality and safety, impact on consumers' health and the environment, and potential consequences on ethical and privacy liberties constitute important factors influencing consumers' perceptions of technologies that provide traceability.

  15. Current Barriers to Large-scale Interoperability of Traceability Technology in the Seafood Sector.

    Science.gov (United States)

    Hardt, Marah J; Flett, Keith; Howell, Colleen J

    2017-08-01

    Interoperability is a critical component of full-chain digital traceability, but is almost nonexistent in the seafood industry. Using both quantitative and qualitative methodology, this study explores the barriers impeding progress toward large-scale interoperability among digital traceability systems in the seafood sector from the perspectives of seafood companies, technology vendors, and supply chains as a whole. We highlight lessons from recent research and field work focused on implementing traceability across full supply chains and make some recommendations for next steps in terms of overcoming challenges and scaling current efforts. © 2017 Institute of Food Technologists®.

  16. Radionuclide traceability for U.S. Department of Energy Environmental Management Radioanalytical Services

    International Nuclear Information System (INIS)

    Morton, J.S.; McIntyre, T.I.

    2001-01-01

    In 1999, the Department of Energy Office of Environmental Management (DOE-EM) National Analytical Management Program (NAMP) established a Radiological Traceability Program (RTP) as a new initiative for the radioanalytical activities related to the environmental programs conducted throughout the DOE complex. The National Analytical Management Program entered into an interagency agreement with the National Institute of Standards and Technology (NIST) to establish traceability to the national standard for DOE-EM radioanalytical activities through the NIST/reference laboratory concept as described in ANSI N42.23-1996. Using the criteria established by the RTP, NAMP named two DOE-EM laboratories as reference or secondary laboratories and established a program with NIST that demonstrated the concept of traceability. In order to gain and maintain traceability to NIST, each reference laboratory must meet the performance criteria as defined by the RTP and NAMP. Traceability to NIST is tiered down to each radioanalytical laboratory (monitor or service) that successfully participates in the performance-evaluation programs offered by the reference laboratories. Essential to the RTP is the demonstration that the reference laboratories can produce performance-testing (PT) materials of high quality as well as analyze/verify the radionuclide concentration to the required accuracy and precision. Elements of the RTP and the program requirements of NIST and the reference laboratories are presented. (author)

  17. Economic assessment of RFID coupled with open source technologies for wood traceability in Calabria

    Directory of Open Access Journals (Sweden)

    Sperandio G

    2017-04-01

    Full Text Available The aim of this work was to assess the economic sustainability of the implementation of a wood traceability system in Calabria based on RFID and open source technologies. We identified a break-even point in its implementation under different scenarios in order to highlight the economic sustainability limits, expressed in terms of m3 or tons of processed product. The results showed that the use of RFID technology along the supply chain could lead to an effective operational simplification and to a more efficient use of resources. Based on the average market prices for timber (80-120 € / m3, the implementation of RFID technology led to an increase in timber price by 8% under the worst scenarios. This suggests that the use of open source technologies for wood traceability is already feasible and economically sustainable, as 40% of private companies stated their willingness to pay a premium price (on average 3.25% higher for purchasing certified local wood products in Calabria. Moreover, we expect a further reduction of tags and hardware costs in the next future, up to half the costs estimated in this work, thus making the application of such technology to timber traceability even more affordable.

  18. [Current progress in food geographical origin traceability by near infrared spectroscopy technology].

    Science.gov (United States)

    Ma, Dong-Hong; Wang, Xi-Chang; Liu, Li-Ping; Liu, Yuan

    2011-04-01

    The geographical origin traceability of food, an important part of traceability system, is effective in protecting the quality and safety of foodstuffs. Near-infrared spectroscopy (NIR), which is a powerful technique for geographical origin traceability, has attracted extensive attention by scientists due to its speediness, non-pollution and simple operation. This paper presents the advantages and disadvantages of techniques that have been used for food geographical origin traceability. The basic principles of NIR and its applications in different food geographical origin traceability are presented too. Furthermore, problems in applications are analyzed and the future development trends are discussed.

  19. 77 FR 18791 - Proposed Information Collection; Comment Request; NIST Associates Information System

    Science.gov (United States)

    2012-03-28

    ... DEPARTMENT OF COMMERCE National Institute of Standards and Technology Proposed Information Collection; Comment Request; NIST Associates Information System AGENCY: National Institute of Standards and... access to the NIST campuses or NIST resources. The NIST Associates Information System (NAIS) information...

  20. NIST display colorimeter calibration facility

    Science.gov (United States)

    Brown, Steven W.; Ohno, Yoshihiro

    2003-07-01

    A facility has been developed at the National Institute of Standards and Technology (NIST) to provide calibration services for color-measuring instruments to address the need for improving and certifying the measurement uncertainties of this type of instrument. While NIST has active programs in photometry, flat panel display metrology, and color and appearance measurements, these are the first services offered by NIST tailored to color-measuring instruments for displays. An overview of the facility, the calibration approach, and associated uncertainties are presented. Details of a new tunable colorimetric source and the development of new transfer standard instruments are discussed.

  1. Exploring the Limitations on RFID Technology in Traceability Systems at Beverage Factories

    Directory of Open Access Journals (Sweden)

    Isabel Expósito

    2013-01-01

    Full Text Available The application of RFID in traceability of products in beverage factories is analyzed in terms of the electromagnetic conditions defined by the massive presence of metallic elements and liquids. Various experiments are reported to determine the maximum reading range from RFID tags installed on tanks or to read RFID information around bottles, both empty and full of wine, trying to put in context the possible problems that could appear when installing an RFID-based traceability system within a winery, a brewery, or any other beverage factory.

  2. Towards a Traceability System Based on RFID Technology to Check the Content of Pallets within Electronic Devices Supply Chain

    Directory of Open Access Journals (Sweden)

    Ignacio Angulo

    2013-01-01

    Full Text Available In the last few years there has been a growing interest in smart solutions capable of dealing with the traceability of products and materials to improve logistical processes. Most of the existing solutions have been designed without considering the difficulties of deploying traceability systems in the storehouses currently working, not dealing with specific needs, such as environment characteristics or time required to be handled by workers. In this paper, in order to test the viability of its application, a first prototype of a traceability system capable of checking the content of pallets loaded with electronic devices is presented. It is based on ultra-high frequency (UHF radio frequency identification (RFID technology using passive tags. A holistic approach has been adopted to design the system: it begins with a radioelectrical characterization of the environment where the check points will be implemented, continues with the integration of a set of data acquisition and wireless communication devices, and ends with a logistics information system able to provide final user services. The combination of physical layer analysis with a top layer system view can aid the planning as well as operational phase of this type of RFID system within a logistic chain.

  3. [Study on brand traceability of vinegar based on near infrared spectroscopy technology].

    Science.gov (United States)

    Guan, Xiao; Liu, Jing; Gu, Fang-Qing; Yang, Yong-Jian

    2014-09-01

    In the present paper, 152 vinegar samples with four different brands were chosen as research targets, and their near infrared spectra were collected by diffusion reflection mode and transmission mode, respectively. Furthermore, the brand traceability models for edible vinegar were constructed. The effects of the collection mode and pretreatment methods of spectrum on the precision of traceability models were investigated intensively. The models constructed by PLS1-DA modeling method using spectrum data of 114 training samples were applied to predict 38 test samples, and R2, RMSEC and RMSEP of the model based on transmission mode data were 0.92, 0.113 and 0.127, respectively, with recognition rate of 76.32%, and those based on diffusion reflection mode data were 0.97, 0.102 and 0.119, with recognition rate of 86.84%. The results demonstrated that the near infrared spectrum combined with PLS1-DA can be used to establish the brand traceability models for edible vinegar, and diffuse reflection mode is more beneficial for predictive ability of the model.

  4. Characterization of LANDSAT Panels Using the NIST BRDF Scale from 1100 nm to 2500 nm

    Science.gov (United States)

    Markham, Brian; Tsai, Benjamin K.; Allen, David W.; Cooksey, Catherine; Yoon, Howard; Hanssen, Leonard; Zeng, Jinan; Fulton, Linda; Biggar, Stuart; Markham, Brian

    2010-01-01

    Many earth observing sensors depend on white diffuse reflectance standards to derive scales of radiance traceable to the St Despite the large number of Earth observing sensors that operate in the reflective solar region of the spectrum, there has been no direct method to provide NIST traceable BRDF measurements out to 2500 rim. Recent developments in detector technology have allowed the NIST reflectance measurement facility to expand the operating range to cover the 250 nm to 2500 nm range. The facility has been modified with and additional detector using a cooled extended range indium gallium arsenide (Extended InGaAs) detector. Measurements were made for two PTFE white diffuse reflectance standards over the 1100 nm to 2500 nm region at a 0' incident and 45' observation angle. These two panels will be used to support the OLI calibration activities. An independent means of verification was established using a NIST radiance transfer facility based on spectral irradiance, radiance standards and a diffuse reflectance plaque. An analysis on the results and associated uncertainties will be discussed.

  5. NIST biometric evaluations and developments

    Science.gov (United States)

    Garris, Michael D.; Wilson, Charles L.

    2005-05-01

    This paper presents an R&D framework used by the National Institute of Standards and Technology (NIST) for biometric technology testing and evaluation. The focus of this paper is on fingerprint-based verification and identification. Since 9-11 the NIST Image Group has been mandated by Congress to run a program for biometric technology assessment and biometric systems certification. Four essential areas of activity are discussed: 1) developing test datasets, 2) conducting performance assessment; 3) technology development; and 4) standards participation. A description of activities and accomplishments are provided for each of these areas. In the process, methods of performance testing are described and results from specific biometric technology evaluations are presented. This framework is anticipated to have broad applicability to other technology and application domains.

  6. Traceability of radiation protection instruments

    Science.gov (United States)

    Hino, Y.; Kurosawa, T.

    2007-08-01

    Radiation protection instruments are used in daily measurement of dose and activities in workplaces and environments for safety management. The requirements for calibration certificates with traceability are increasing for these instruments to ensure the consistency and reliabilities of the measurement results. The present traceability scheme of radiation protection instruments for dose and activity measurements is described with related IEC/ISO requirements. Some examples of desirable future calibration systems with recent new technologies are also discussed to establish the traceability with reasonable costs and reliabilities.

  7. AN INTEGRATED TECHNOLOGICAL TRACEABILITY MODEL IN THE OLIVE GROWING PRODUCTION CHAIN

    Directory of Open Access Journals (Sweden)

    Ferruccio Giametta

    2008-12-01

    Full Text Available The indication of the “path” travelled by all European agrofood products has by now become compulsory: starting from January the 1st, 2005 EC Regulation 178/2002 has established the notions of food tracking and tracing as well as the concept of food safety. Food traceability and safety are becoming notions of crucial importance to those who work in this sector in view of their potentially positive influence on produce competitiveness and appreciation on the part of consumers. This specific line of research is focused on the analysis and the use of both tracking and tracing systems of olive and olive oil products throughout the entire territory of Calabria. A detailed analysis of the productive processes has been made possible through the definition of the socalled “dynamic lot”: a unit of product processed (either directly or indirectly in a time unit (usually a day, as a function of the peculiarities of the olive growing farms involved (orographic features, level of mechanization, etc.. The software architecture (which is currently being updated has been studied considering the reality of the territory in question, and the average level of computer/software literacy of the operators asked to use it.

  8. [Studies on the brand traceability of milk powder based on NIR spectroscopy technology].

    Science.gov (United States)

    Guan, Xiao; Gu, Fang-Qing; Liu, Jing; Yang, Yong-Jian

    2013-10-01

    Brand traceability of several different kinds of milk powder was studied by combining near infrared spectroscopy diffuse reflectance mode with soft independent modeling of class analogy (SIMCA) in the present paper. The near infrared spectrum of 138 samples, including 54 Guangming milk powder samples, 43 Netherlands samples, and 33 Nestle samples and 8 Yili samples, were collected. After pretreatment of full spectrum data variables in training set, principal component analysis was performed, and the contribution rate of the cumulative variance of the first three principal components was about 99.07%. Milk powder principal component regression model based on SIMCA was established, and used to classify the milk powder samples in prediction sets. The results showed that the recognition rate of Guangming milk powder, Netherlands milk powder and Nestle milk powder was 78%, 75% and 100%, the rejection rate was 100%, 87%, and 88%, respectively. Therefore, the near infrared spectroscopy combined with SIMCA model can classify milk powder with high accuracy, and is a promising identification method of milk powder variety.

  9. EPA’s Hg Gas Traceability Approach for Source Emissions Measurement and Monitoring

    Science.gov (United States)

    Solicited presentation (special topic) at the International Conference on Mercury as a Global Pollutant on how EPA establishes the NIST traceability of reference materials used to support regulatory mercury emissions measurements.

  10. Transferability of ASTM/NIST alanine-polyethylene recipe at ISS. American Society for Testing and Materials/National Institute for Standards and Technology. Istituto Superiore de Sanita

    Science.gov (United States)

    De Angelis C; Fattibene; Onori; Petetti; Bartolotta; Sansone Santamaria A

    2000-05-01

    Alanine-polyethylene solid state dosimeters were prepared at Istituto Superiore di Sanita (ISS) following the recipe proposed by National Institute of Standards and Technology (NIST) with the goal of testing its transferability. Dosimeters were prepared using 95% alanine and 5% polyethylene, by weight. They are rugged and of increased sensitivity, repeatability and reproducibility as respect to the ISS alanine-paraffin pellets. Reproducibility of about 1% was obtained at 10 Gy and at 3 Gy if one single pellet or a stack of five dosimeters were used, respectively.

  11. NIST high-dose calibration services

    International Nuclear Information System (INIS)

    Humphreys, J.C.

    1989-01-01

    There is a need for the standardization of high-dose measurements used in the radiation-processing industry in order to provide assured traceability to national standards. NIST provides dosimetry calibration services to this industry. One of these services involves administration of known absorbed doses of gamma rays to customer-supplied dosimeters. The dosimeters are packaged to provide electron equilibrium conditions and are irradiated in a standard 60 Co calibration facility; this provides a calibration of that batch of dosimeters. Another service consists of supplying to a customer calibrated transfer dosimeters for irradiation with the customer's radiation source. The irradiated transfer dosimeters are then returned to NIST for analysis; the results are reported to the customer, providing a calibration of the dose rate of the customer's source. (orig.)

  12. The Atomic Spectroscopy Data Center at the National Institute of Standards and Technology (NIST). Activities 1999-2001

    International Nuclear Information System (INIS)

    Wiese, W.L.

    2001-01-01

    Dr. Wiese discussed activities and trends at the NIST Data Centers in the last two years. He reviewed priorities covered in data work and reviewed the bibliographic and numerical databases now on their website. The Atomic Spectra Database (ASD) is their main atomic physics web database and this is a reference data, e.g., the wavelength data is generally accurate to six significant figures and transition probability data is certain to with less than ±50%. Dr. Wiese also reported about recent work on the compilation and evaluation of data for wavelengths and energy levels of elements Cu, Kr and Mo (and several others), which are fusion relevant

  13. The Atomic Spectroscopy Data Center at the National Institute of Standards and Technology (NIST). Activities 1999-2001

    Energy Technology Data Exchange (ETDEWEB)

    Wiese, W L

    2001-12-01

    Dr. Wiese discussed activities and trends at the NIST Data Centers in the last two years. He reviewed priorities covered in data work and reviewed the bibliographic and numerical databases now on their website. The Atomic Spectra Database (ASD) is their main atomic physics web database and this is a reference data, e.g., the wavelength data is generally accurate to six significant figures and transition probability data is certain to with less than {+-}50%. Dr. Wiese also reported about recent work on the compilation and evaluation of data for wavelengths and energy levels of elements Cu, Kr and Mo (and several others), which are fusion relevant.

  14. LEP Traceability

    CERN Document Server

    Billen, R

    2000-01-01

    After more than ten years of production for high energy physics, CERN's current flagship, LEP, will be closed down definitively October 1st, 2000. Starting immediately, some 30,000 tonnes of LEP materials will be removed from the tunnel to make room for LHC installation. The dismantling project is a major undertaking in terms of resources and constraints, which has to be completed in less than one year. Moreover, since LEP is classified as a nuclear installation in France (as if it was a nuclear power plant), special procedures have to be followed in addition to the normal environmental and safety issues. One major facet of the project is the "traceability" of everything that comes out of the LEP tunnel. This implies that each piece of equipment must be identified and tracked from its origin through any temporary storage to its final destination. Special procedures have to be followed for all materials even if they are not radioactive. As much of the equipment as possible will be recycled or disposed of. This...

  15. NIST Gonio-spectroradiometer

    Data.gov (United States)

    Federal Laboratory Consortium — The NIST gonio-spectroradiometer is used to measure total spectral radiant flux (TSRF) of incandescent lamps. The instrument consists of a 3-axis scanning mechanism;...

  16. Traceability in Patient Healthcare through the Integration of RFID Technology in an ICU in a Hospital.

    Science.gov (United States)

    Martínez Pérez, María; Dafonte, Carlos; Gómez, Ángel

    2018-05-19

    Patient safety is a principal concern for health professionals in the care process and it is, therefore, necessary to provide information management systems to each unit of the hospital, capable of tracking patients and medication to reduce the occurrence of adverse events and therefore increase the quality of care received by patients during their stay in hospital. This work presents a tool for the Intensive Care Unit (ICU), a key service with special characteristics, which computerises and tracks admissions, care plans, vital monitoring, the prescription and medication administration process for patients in this service. To achieve this, it is essential that innovative and cutting-edge technologies are implemented such as Near Field Communication (NFC) technology which is now being implemented in diverse environments bringing a range of benefits to the tasks for which it is employed.

  17. 76 FR 43264 - Proposed Information Collection; Comment Request; NIST MEP Client Impact Survey

    Science.gov (United States)

    2011-07-20

    ... DEPARTMENT OF COMMERCE National Institute of Standards and Technology Proposed Information Collection; Comment Request; NIST MEP Client Impact Survey AGENCY: National Institute of Standards and Technology (NIST), Commerce. ACTION: Notice. SUMMARY: The Department of Commerce, as part of its continuing...

  18. Quality Traceability System of Traditional Chinese Medicine Based on Two Dimensional Barcode Using Mobile Intelligent Technology.

    Directory of Open Access Journals (Sweden)

    Yong Cai

    Full Text Available Currently, the chemical fingerprint comparison and analysis is mainly based on professional equipment and software, it's expensive and inconvenient. This study aims to integrate QR (Quick Response code with quality data and mobile intelligent technology to develop a convenient query terminal for tracing quality in the whole industrial chain of TCM (traditional Chinese medicine. Three herbal medicines were randomly selected and their chemical two-dimensional barcode (2D barcodes fingerprints were constructed. Smartphone application (APP based on Android system was developed to read initial data of 2D chemical barcodes, and compared multiple fingerprints from different batches of same species or different species. It was demonstrated that there were no significant differences between original and scanned TCM chemical fingerprints. Meanwhile, different TCM chemical fingerprint QR codes could be rendered in the same coordinate and showed the differences very intuitively. To be able to distinguish the variations of chemical fingerprint more directly, linear interpolation angle cosine similarity algorithm (LIACSA was proposed to get similarity ratio. This study showed that QR codes can be used as an effective information carrier to transfer quality data. Smartphone application can rapidly read quality information in QR codes and convert data into TCM chemical fingerprints.

  19. Traceability and Measurement Uncertainty

    DEFF Research Database (Denmark)

    Tosello, Guido; De Chiffre, Leonardo

    2004-01-01

    . The project partnership aims (composed by 7 partners in 5 countries, thus covering a real European spread in high tech production technology) to develop and implement an advanced e-learning system that integrates contributions from quite different disciplines into a user-centred approach that strictly....... Machine tool testing 9. The role of manufacturing metrology for QM 10. Inspection planning 11. Quality management of measurements incl. Documentation 12. Advanced manufacturing measurement technology The present report (which represents the section 2 - Traceability and Measurement Uncertainty – of the e-learning......This report is made as a part of the project ‘Metro-E-Learn: European e-Learning in Manufacturing Metrology’, an EU project under the program SOCRATES MINERVA (ODL and ICT in Education), Contract No: 101434-CP-1-2002-1-DE-MINERVA, coordinated by Friedrich-Alexander-University Erlangen...

  20. Optical Passive Sensor Calibration for Satellite Remote Sensing and the Legacy of NOAA and NIST Cooperation.

    Science.gov (United States)

    Datla, Raju; Weinreb, Michael; Rice, Joseph; Johnson, B Carol; Shirley, Eric; Cao, Changyong

    2014-01-01

    This paper traces the cooperative efforts of scientists at the National Oceanic and Atmospheric Administration (NOAA) and the National Institute of Standards and Technology (NIST) to improve the calibration of operational satellite sensors for remote sensing of the Earth's land, atmosphere and oceans. It gives a chronological perspective of the NOAA satellite program and the interactions between the two agencies' scientists to address pre-launch calibration and issues of sensor performance on orbit. The drive to improve accuracy of measurements has had a new impetus in recent years because of the need for improved weather prediction and climate monitoring. The highlights of this cooperation and strategies to achieve SI-traceability and improve accuracy for optical satellite sensor data are summarized.

  1. 77 FR 40586 - Draft NIST Interagency Report (NISTIR) 7823, Advanced Metering Infrastructure Smart Meter...

    Science.gov (United States)

    2012-07-10

    ...-01] Draft NIST Interagency Report (NISTIR) 7823, Advanced Metering Infrastructure Smart Meter... Technology (NIST) seeks comments on Draft NISTIR 7823, Advanced Metering Infrastructure Smart Meter... conformance test requirements for the firmware upgradeability process for the Advanced Metering Infrastructure...

  2. The new NIST atomic spectra database

    International Nuclear Information System (INIS)

    Kelleher, D.E.; Martin, W.C.; Wiese, W.L.; Sugar, J.; Fuhr, J.R.; Olsen, K.; Musgrove, A.; Mohr, P.J.; Reader, J.; Dalton, G.R.

    1999-01-01

    The new atomic spectra database (ASD), Version 2.0, of the National Institute of Standards and Technology (NIST) contains significantly more data and covers a wider range of atomic and ionic transitions and energy levels than earlier versions. All data are integrated. It also has a new user interface and search engine. ASD contains spectral reference data which have been critically evaluated and compiled by NIST. Version 2.0 contains data on 900 spectra, with about 70000 energy levels and 91000 lines ranging from about 1 Aangstroem to 200 micrometers, roughly half of which have transition probabilities with estimated uncertainties. References to the NIST compilations and original data sources are listed in the ASD bibliography. A detailed ''Help'' file serves as a user's manual, and full search and filter capabilities are provided. (orig.)

  3. Managing traceability information manufacture

    NARCIS (Netherlands)

    Jansen-Vullers, M.H.; van Dorp, C.A.; Beulens, A.J.M.

    2003-01-01

    In this paper, an approach to design information systems for traceability is proposed. The paper applies gozinto graph modelling for traceability of the goods flow. A gozinto graph represents a graphical listing of raw materials, parts, intermediates and subassemblies, which a process transforms

  4. Food traceability systems in China: The current status of and future perspectives on food supply chain databases, legal support, and technological research and support for food safety regulation.

    Science.gov (United States)

    Tang, Qi; Li, Jiajia; Sun, Mei; Lv, Jun; Gai, Ruoyan; Mei, Lin; Xu, Lingzhong

    2015-02-01

    Over the past few decades, the field of food security has witnessed numerous problems and incidents that have garnered public attention. Given this serious situation, the food traceability system (FTS) has become part of the expanding food safety continuum to reduce the risk of food safety problems. This article reviews a great deal of the related literature and results from previous studies of FTS to corroborate this contention. This article describes the development and benefits of FTS in developed countries like the United States of America (USA), Japan, and some European countries. Problems with existing FTS in China are noted, including a lack of a complete database, inadequate laws and regulations, and lagging technological research into FTS. This article puts forward several suggestions for the future, including improvement of information websites, clarification of regulatory responsibilities, and promotion of technological research.

  5. Traceability of trace analysis

    International Nuclear Information System (INIS)

    King, Bernard

    2002-01-01

    Traceability provides the terminology, concepts and strategy for ensuring that analytical chemical measurements are comparable. At present the reference points are often internationally agreed methods; they can also be reference materials. Ideally there should be a single reference point, which in the case of chemistry is the SI Unit the mole but much work will be required to achieve such a situation. Traceability does not imply high accuracy and levels of certainty consistent with fitness for purpose criteria is the goal. This paper discusses the relevance of the concept of traceability and reviews developments leading to a conceptual model for analytical chemistry. It also reports some recent work and considers future needs. (author)

  6. KNOWLEDGE AND ACCEPTANCE OF RFID TRACEABILITY SOLUTIONS

    Directory of Open Access Journals (Sweden)

    Zoltan KATO

    2014-06-01

    Full Text Available In recent years the food market has become highly dynamic. Food crises in the early 90's, or those of the recent years, such as avian flu pandemic, swine flu, the cucumber or horse meat crises all had a negative impact on the Romanian food industry. Food deficiencies have led not only to contamination but also to the illness or death of some consumers. The products traceability is a prerequisite for success in the food industry. As a modern solution, RFID technology can be useful for traceability applications made with rewritable passive RFID tags. This paper aims to examine how RFID technology can be useful for traceability applications and will submit a diligent search regarding the degree of knowledge of RFID technology and the acceptance of an empirical model by the employees of Romanian companies.

  7. Sandia WIPP calibration traceability

    Energy Technology Data Exchange (ETDEWEB)

    Schuhen, M.D. [Sandia National Labs., Albuquerque, NM (United States); Dean, T.A. [RE/SPEC, Inc., Albuquerque, NM (United States)

    1996-05-01

    This report summarizes the work performed to establish calibration traceability for the instrumentation used by Sandia National Laboratories at the Waste Isolation Pilot Plant (WIPP) during testing from 1980-1985. Identifying the calibration traceability is an important part of establishing a pedigree for the data and is part of the qualification of existing data. In general, the requirement states that the calibration of Measuring and Test equipment must have a valid relationship to nationally recognized standards or the basis for the calibration must be documented. Sandia recognized that just establishing calibration traceability would not necessarily mean that all QA requirements were met during the certification of test instrumentation. To address this concern, the assessment was expanded to include various activities.

  8. Sandia WIPP calibration traceability

    International Nuclear Information System (INIS)

    Schuhen, M.D.; Dean, T.A.

    1996-05-01

    This report summarizes the work performed to establish calibration traceability for the instrumentation used by Sandia National Laboratories at the Waste Isolation Pilot Plant (WIPP) during testing from 1980-1985. Identifying the calibration traceability is an important part of establishing a pedigree for the data and is part of the qualification of existing data. In general, the requirement states that the calibration of Measuring and Test equipment must have a valid relationship to nationally recognized standards or the basis for the calibration must be documented. Sandia recognized that just establishing calibration traceability would not necessarily mean that all QA requirements were met during the certification of test instrumentation. To address this concern, the assessment was expanded to include various activities

  9. Using design rationale to improve SPL traceability

    NARCIS (Netherlands)

    Galvao, I.; Aksit, Mehmet; van den Broek, P.M.; Hendriks, M.F.H.; Rashid, Awais; Royer, Jean-Claude; Rummler, Andreas

    In order to improve SPL traceability by using design rationale, this chapter introduces the traceability analysis framework (TAF), which, when combined with the AMPLE Traceability Framework, provides extra traceability capabilities for variability management. The TAF is a programmable and extensible

  10. Making cocoa origin traceable

    NARCIS (Netherlands)

    Acierno, Valentina; Alewijn, Martin; Zomer, Paul; Ruth, van Saskia M.

    2018-01-01

    More and more attention is paid to sustainability in the cocoa production. Tools that assist in making sustainable cocoa traceable are therefore welcome. In the present study, the applicability of Flow Infusion-Electrospray Ionization- Mass Spectrometry (FI-ESI-MS) to assess the geographical origin

  11. An Introduction to Requirements Traceability

    NARCIS (Netherlands)

    Wieringa, Roelf J.

    This report surveys the requirements traceability literature and gives some recommendations for further research and for an approach to consultancy concerning traceability in the 2RARE project. The problem of maintaining traceability in a development project is viewed as the problem of maintaining

  12. Development of Traceable Phantoms for Improved Image Quantification in Positron Emission Tomography

    Science.gov (United States)

    Zimmerman, Brian

    2014-03-01

    Clinical trials for new drugs increasingly rely on imaging data to monitor patient response to the therapy being studied. In the case of radiopharmaceutical applications, imaging data are also used to estimate organ and tumor doses in order to arrive at the optimal dosage for safe and effective treatment. Positron Emission Tomography (PET) is one of the most commonly used imaging modalities for these types of applications. In large, multicenter trials it is crucial to minimize as much as possible the variability that arises due to use of different types of scanners and other instrumentation so that the biological response can be more readily evaluated. This can be achieved by ensuring that all the instruments are calibrated to a common standard and that their performance is continuously monitored throughout the trial. Maintaining links to a single standard also enables the comparability of data acquired on a heterogeneous collection of instruments in different clinical settings. As the standards laboratory for the United States, the National Institute of Standards and Technology (NIST) has been developing a suite of phantoms having traceable activity content to enable scanner calibration and performance testing. The configurations range from small solid cylindrical sources having volumes from 1 mL to 23 mL to large cylinders having a total volume of 9 L. The phantoms are constructed with 68Ge as a long-lived substitute for the more clinically useful radionuclide 18F. The contained activity values are traceable to the national standard for 68Ge and are also linked to the standard for 18F through a careful series of comparisons. The techniques that have been developed are being applied to a variety of new phantom configurations using different radionuclides. Image-based additive manufacturing techniques are also being investigated to create fillable phantoms having irregular shapes which can better mimic actual organs and tumors while still maintaining traceability

  13. Traceable nanoscale measurement at NML-SIRIM

    International Nuclear Information System (INIS)

    Dahlan, Ahmad M.; Abdul Hapip, A. I.

    2012-01-01

    The role of national metrology institute (NMI) has always been very crucial in national technology development. One of the key activities of the NMI is to provide traceable measurement in all parameters under the International System of Units (SI). Dimensional measurement where size and shape are two important features investigated, is one of the important area covered by NMIs. To support the national technology development, particularly in manufacturing sectors and emerging technology such nanotechnology, the National Metrology Laboratory, SIRIM Berhad (NML-SIRIM), has embarked on a project to equip Malaysia with state-of-the-art nanoscale measurement facility with the aims of providing traceability of measurement at nanoscale. This paper will look into some of the results from current activities at NML-SIRIM related to measurement at nanoscale particularly on application of atomic force microscope (AFM) and laser based sensor in dimensional measurement. Step height standards of different sizes were measured using AFM and laser-based sensors. These probes are integrated into a long-range nanoscale measuring machine traceable to the international definition of the meter thus ensuring their traceability. Consistency of results obtained by these two methods will be discussed and presented. Factors affecting their measurements as well as their related uncertainty of measurements will also be presented.

  14. Traceable nanoscale measurement at NML-SIRIM

    Science.gov (United States)

    Dahlan, Ahmad M.; Abdul Hapip, A. I.

    2012-06-01

    The role of national metrology institute (NMI) has always been very crucial in national technology development. One of the key activities of the NMI is to provide traceable measurement in all parameters under the International System of Units (SI). Dimensional measurement where size and shape are two important features investigated, is one of the important area covered by NMIs. To support the national technology development, particularly in manufacturing sectors and emerging technology such nanotechnology, the National Metrology Laboratory, SIRIM Berhad (NML-SIRIM), has embarked on a project to equip Malaysia with state-of-the-art nanoscale measurement facility with the aims of providing traceability of measurement at nanoscale. This paper will look into some of the results from current activities at NML-SIRIM related to measurement at nanoscale particularly on application of atomic force microscope (AFM) and laser based sensor in dimensional measurement. Step height standards of different sizes were measured using AFM and laser-based sensors. These probes are integrated into a long-range nanoscale measuring machine traceable to the international definition of the meter thus ensuring their traceability. Consistency of results obtained by these two methods will be discussed and presented. Factors affecting their measurements as well as their related uncertainty of measurements will also be presented.

  15. Traceable nanoscale measurement at NML-SIRIM

    Energy Technology Data Exchange (ETDEWEB)

    Dahlan, Ahmad M.; Abdul Hapip, A. I. [National Metrology Laboratory SIRIM Berhad (NML-SIRIM), Lot PT 4803, Bandar Baru Salak Tinggi, 43900 Sepang (Malaysia)

    2012-06-29

    The role of national metrology institute (NMI) has always been very crucial in national technology development. One of the key activities of the NMI is to provide traceable measurement in all parameters under the International System of Units (SI). Dimensional measurement where size and shape are two important features investigated, is one of the important area covered by NMIs. To support the national technology development, particularly in manufacturing sectors and emerging technology such nanotechnology, the National Metrology Laboratory, SIRIM Berhad (NML-SIRIM), has embarked on a project to equip Malaysia with state-of-the-art nanoscale measurement facility with the aims of providing traceability of measurement at nanoscale. This paper will look into some of the results from current activities at NML-SIRIM related to measurement at nanoscale particularly on application of atomic force microscope (AFM) and laser based sensor in dimensional measurement. Step height standards of different sizes were measured using AFM and laser-based sensors. These probes are integrated into a long-range nanoscale measuring machine traceable to the international definition of the meter thus ensuring their traceability. Consistency of results obtained by these two methods will be discussed and presented. Factors affecting their measurements as well as their related uncertainty of measurements will also be presented.

  16. The 2016 NIST Speaker Recognition Evaluation

    Science.gov (United States)

    2017-08-20

    impact on system performance. Index Terms: NIST evaluation, NIST SRE, speaker detection, speaker recognition, speaker verification 1. Introduction NIST... self -reported. Second, there were two training conditions in SRE16, namely fixed and open. In the fixed training condition, par- ticipants were only

  17. 77 FR 52692 - NIST Federal Information Processing Standard (FIPS) 140-3 (Second Draft), Security Requirements...

    Science.gov (United States)

    2012-08-30

    ...-03] NIST Federal Information Processing Standard (FIPS) 140-3 (Second Draft), Security Requirements....'' Authority: Federal Information Processing Standards (FIPS) are issued by the National Institute of Standards... Standards and Technology (NIST) seeks additional comments on specific sections of Federal Information...

  18. HAPPY Team Entry to NIST OpenSAD Challenge

    DEFF Research Database (Denmark)

    Kinnunen, Tomi; Sholokhov, Alexey; Khoury, Elie

    2016-01-01

    Speech activity detection (SAD), the task of locating speech segments from a given recording, remains challenging under acoustically degraded conditions. In 2015, National Institute of Standards and Technology (NIST) coordinated OpenSAD bench-mark. We summarize “HAPPY” team effort to Open- SAD...

  19. Chapter 3: Traceability and uncertainty

    International Nuclear Information System (INIS)

    McEwen, Malcolm

    2014-01-01

    Chapter 3 presents: an introduction; Traceability (measurement standard, role of the Bureau International des Poids et Mesures, Secondary Standards Laboratories, documentary standards and traceability as process review); Uncertainty (Example 1 - Measurement, M raw (SSD), Example 2 - Calibration data, N D.w 60 Co, kQ, Example 3 - Correction factor, P TP ) and Conclusion

  20. Managing traceability information in manufacture

    NARCIS (Netherlands)

    Jansen-Vullers, M.H.; Dorp, van C.A.; Beulens, A.J.M.

    2003-01-01

    In this paper, an approach to design information systems for traceability is proposed. The paper applies gozinto graph modelling for traceability of the goods flow. A gozinto graph represents a graphical listing of raw materials, parts, intermediates and subassemblies, which a process transforms

  1. Consumer acceptance of a quick response (QR) code for the food traceability system: Application of an extended technology acceptance model (TAM).

    Science.gov (United States)

    Kim, Yeong Gug; Woo, Eunju

    2016-07-01

    The objectives of this study are to apply the TAM using the addition of perceived information to individuals' behavioral intention to use the QR code for the food traceability system; and to determine the moderating effects of food involvement on the relationship between perceived information and perceived usefulness. Results from a survey of 420 respondents are analyzed using structural equation modeling. The study findings reveal that the extended TAM has a satisfactory fit to the data and that the underlying dimensions have a significant effect on consumers' intention to use the QR code for the food traceability system. In addition, food involvement plays a significant moderating function in the relationship between perceived information and perceived usefulness. The implications of this study for future research are discussed. Copyright © 2016 Elsevier Ltd. All rights reserved.

  2. Real Traceable Signatures

    Science.gov (United States)

    Chow, Sherman S. M.

    Traceable signature scheme extends a group signature scheme with an enhanced anonymity management mechanism. The group manager can compute a tracing trapdoor which enables anyone to test if a signature is signed by a given misbehaving user, while the only way to do so for group signatures requires revealing the signer of all signatures. Nevertheless, it is not tracing in a strict sense. For all existing schemes, T tracing agents need to recollect all N' signatures ever produced and perform RN' “checks” for R revoked users. This involves a high volume of transfer and computations. Increasing T increases the degree of parallelism for tracing but also the probability of “missing” some signatures in case some of the agents are dishonest.

  3. Traceability technique of isotopic application in food safety

    International Nuclear Information System (INIS)

    Guo Boli; Wei Yimin; Pan Jiarong

    2006-01-01

    Epidemics such as BSE, mouth and foot disease, avian influenza have brought new pressure to food safety management, constituted a extreme threat to people health, and caused serious economic loss and social scare to countries with outbreaks of above diseases. Isotopic tracing technology is an effect tool for tracing food origin and implementing the preservation of production premise in the world at present, and it is promising in the field of food safety traceability, so some developed countries have put a lot of effort on establishment of isotopic technology for food traceability. In this paper, the basic principles of isotopic tracing technology and the recent research advancement were be expounded, and the differentiate and connection was be compared between isotopic tracing technology and others. Furthermore, the suggestion about study of isotopic tracing technology in China was put forward. The aim of the paper is to promote the establishment and improvement of food traceability system, and ensure the consumer health. (authors)

  4. Perspectives on traceability in food manufacture

    DEFF Research Database (Denmark)

    Moe, Tina

    1998-01-01

    Traceability in food manufacturing can range from in-house traceability in production plants to traceability in whole or part of the production chain from raw material to consumer, and descriptors of the product and its history can be few or many as decided. Well thought-out traceability systems...

  5. Ethical Traceability and Communicating Food

    DEFF Research Database (Denmark)

    Traceability – the ability to track a product from farm to plate – is now widely used in the food sector for a range of purposes: it allows companies to improve efficiency, facilitates product recall, and helps producers flag the specific characteristics of their goods. But traceability systems...... are mainly designed and used by the people directly involved in the food chain. The people at the end of the food chain – food consumers – have little say in which attributes are traced, and can rarely access the information stored in traceability systems. This book draws on philosophical discourses (like...... ethics, political philosophy and philosophy of law) around food ethics and empirical research in three important food chains (UK bread, Danish bacon and Greek olive oil) to argue that ethical traceability systems could be used to communicate food information to consumers, allowing them not only to make...

  6. Further Investigations of NIST Water Sphere Discrepancies

    International Nuclear Information System (INIS)

    Broadhead, B.L.

    2001-01-01

    Measurements have been performed on a family of water spheres at the National Institute of Standards and Technology (NIST) facilities. These measurements are important for criticality safety studies in that, frequently, difficulties have arisen in predicting the reactivity of individually subcritical components assembled in a critical array. It has been postulated that errors in the neutron leakage from individual elements in the array could be responsible for these problems. In these NIST measurements, an accurate determination of the leakage from a fission spectrum, modified by water scattering, is available. Previously, results for 3-, 4-, and 5-in. diam. water-filled spheres, both with and without cadmium covers over the fission chambers, were presented for four fissionable materials: 235 U, 238 U, 237 Np, and 239 Pu. Results were also given for ''dry'' systems, in which the water spheres were drained of water, with the results corresponding to essentially measurements of unmoderated 252 Cf spontaneous-fission neutrons. The calculated-to-experimental (C/E) values ranged from 0.94 to 1.01 for the dry systems and 0.93 to 1.05 for the wet systems, with experimental uncertainties ranging from 1.5 to 1.9%. These results indicated discrepancies that were clearly outside of the experimental uncertainties, and further investigation was suggested. This work updates the previous calculations with a comparison of the predicted C/E values with ENDF/B-V and ENDF/B-VI transport cross sections. Variations in the predicted C/E values that arise from the use of ENDF/B-V, ENDF/B-VI, ENDL92, and LLLDOS for the response fission cross sections are also tabulated. The use of both a 45-group NIST fission spectrum and a continuous-energy fission spectrum for 252 Cf are evaluated. The use of the generalized-linear-least-squares (GLLSM) procedures to investigate the reported discrepancies in the water sphere results for 235 U, 238 U, 239 Pu, and 237 Np is reported herein. These studies

  7. Consensus values for NIST biological and environmental Standard Reference Materials

    International Nuclear Information System (INIS)

    Roelandts, I.; Gladney, E.S.

    1998-01-01

    The National Institute of Standards and Technology (NIST, formerly the National Bureau of Standards or NBS) has produced numerous Standard Reference Materials (SRM) for use in biological and environmental analytical chemistry. The value listed on the ''NIST Certificate of Analysis'' is the present best estimate of the ''true'' concentration of that element and is not expected to deviate from that concentration by more than the stated uncertainty. However, NIST does not certify the elemental concentration of every constituent and the number of elements reported in the NIST programs tends to be limited.Numerous analysts have published concentration data on these reference materials. Major journals in analytical chemistry, books, proceedings and ''technical reports'' have been surveyed to collect these available literature values. A standard statistical approach has been employed to evaluate the compiled data. Our methodology has been developed in a series of previous papers. Some subjective criteria are first used to reject aberrant data. Following these eliminations, an initial arithmetic mean and standard deviation (S.D.) are computed from remaining data for each element. All data now outside two S.D. from the initial mean are dropped and a second mean and S.D. recalculated. These final means and associated S.D. are reported as ''consensus values'' in our tables. (orig.)

  8. In-situ burning: NIST studies

    International Nuclear Information System (INIS)

    Evans, D.D.

    1992-01-01

    In-situ burning of spilled oil has distinct advantages over other countermeasures. It offers the potential to convert rapidly large quantities of oil into its primary combustion products, carbon dioxide and water, with a small percentage of other unburned and residue byproducts. Because the oil is converted to gaseous products of combustion by burning, the need for physical collection, storage, and transport of recovered fluids is reduced to the few percent of the original spill volume that remains as residue after burning. Burning oil spills produces a visible smoke plume containing smoke particulate and other products of combustion which may persist for many kilometers from the burn. This fact gives rise to public health concerns, related to the chemical content of the smoke plume and the downwind deposition of particulate, which need to be answered. In 1985, a joint Minerals Management Service (MMS) and Environment Canada (EC) in-situ burning research program was begun at the National Institute of Standards and Technology (NIST). This research program was designed to study the burning of large crude oil spills on water and how this burning would affect air quality by quantifying the products of combustion and developing methods to predict the downwind smoke particulate deposition. To understand the important features of in-situ burning, it is necessary to perform both laboratory and mesoscale experiments. Finally, actual burns of spilled oil at sea will be necessary to evaluate the method at the anticipated scale of actual response operations. In this research program there is a continuing interaction between findings from measurements on small fire experiments performed in the controlled laboratory environments of NIST and the Fire Research Institute (FRI) in Japan, and large fire experiments at facilities like the USCG Fire Safety and Test Detachment in Mobile, Alabama where outdoor liquid fuel burns in large pans are possible

  9. Next-generation services for e-traceability to ionizing radiation national standards

    International Nuclear Information System (INIS)

    Desrosiers, M.F.; Klemick, Mark; Puhl, J.M.; Uchida, David; Mallis, Steven

    2004-01-01

    An Internet-based system for fast, remote certification of high-dose radiation sources against the US national standard is being constructed at the National Institute of Standards and Technology (NIST). The new service will establish traceability (through transfer dosimetry) in real time at a lower cost by using automated routines and the Internet. A prototype of this service was successfully demonstrated in 2000 at the American Society for Testing and Materials (ASTM) Dosimetry Workshop in San Diego. Despite this impressive accomplishment, new developments demanded that several aspects of the service be modified. The new service has been completely redesigned to address these new demands and ensure greater accessibility. A description of the hardware and software configurations of this service as well as the communication and information management aspects will be presented. The Internet-based transfer certification program will provide industry with 24-h, 7-day-per-week, on-demand certifications, immediate turnaround times, and lower cost, ultimately improving the quality of the manufacturing process

  10. Next-generation services for e-traceability to ionizing radiation national standards

    Science.gov (United States)

    Desrosiers, Marc F.; Klemick, Mark; Puhl, James M.; Uchida, David; Mallis, Steven

    2004-09-01

    An Internet-based system for fast, remote certification of high-dose radiation sources against the US national standard is being constructed at the National Institute of Standards and Technology (NIST). The new service will establish traceability (through transfer dosimetry) in real time at a lower cost by using automated routines and the Internet. A prototype of this service was successfully demonstrated in 2000 at the American Society for Testing and Materials (ASTM) Dosimetry Workshop in San Diego. Despite this impressive accomplishment, new developments demanded that several aspects of the service be modified. The new service has been completely redesigned to address these new demands and ensure greater accessibility. A description of the hardware and software configurations of this service as well as the communication and information management aspects will be presented. The Internet-based transfer certification program will provide industry with 24-h, 7-day-per-week, on-demand certifications, immediate turnaround times, and lower cost, ultimately improving the quality of the manufacturing process.

  11. The use of high accuracy NAA for the certification of NIST botanical standard reference materials

    International Nuclear Information System (INIS)

    Becker, D.A.; Greenberg, R.R.; Stone, S.F.

    1992-01-01

    Neutron activation analysis is one of many analytical techniques used at the National Institute of Standards and Technology (NIST) for the certification of NIST Standard Reference Materials (SRMs). NAA competes favorably with all other techniques because of it's unique capabilities for high accuracy even at very low concentrations for many elements. In this paper, instrumental and radiochemical NAA results are described for 25 elements in two new NIST SRMs, SRM 1515 (Apple Leaves) and SRM 1547 (Peach Leaves), and are compared to the certified values for 19 elements in these two new botanical reference materials. (author) 7 refs.; 4 tabs

  12. KNOWLEDGE AND ACCEPTANCE OF RFID TRACEABILITY SOLUTIONS

    OpenAIRE

    Zoltan KATO

    2014-01-01

    In recent years the food market has become highly dynamic. Food crises in the early 90's, or those of the recent years, such as avian flu pandemic, swine flu, the cucumber or horse meat crises all had a negative impact on the Romanian food industry. Food deficiencies have led not only to contamination but also to the illness or death of some consumers. The products traceability is a prerequisite for success in the food industry. As a modern solution, RFID technology can be useful for tr...

  13. Realising traceable electrostatic forces despite non-linear balance motion

    International Nuclear Information System (INIS)

    Stirling, Julian; Shaw, Gordon A

    2017-01-01

    Direct realisation of force, traceable to fundamental constants via electromagnetic balances, is a key goal of the proposed redefinition of the international system of units (SI). This will allow small force metrology to be performed using an electrostatic force balance (EFB) rather than subdivision of larger forces. Such a balance uses the electrostatic force across a capacitor to balance an external force. In this paper we model the capacitance of a concentric cylinder EFB design as a function of the displacement of its free electrode, accounting for the arcuate motion produced by parallelogram linkages commonly used in EFB mechanisms. From this model we suggest new fitting procedures to reduce uncertainties arising from non-linear motion as well as methods to identify misalignment of the mechanism. Experimental studies on both a test capacitor and the NIST EFB validate the model. (paper)

  14. NIST-Traceable NMR Method to Determine Quantitative Weight Percentage Purity of Mustard (HD) Feedstock Samples

    Science.gov (United States)

    2018-01-01

    from Fluka (Sigma Aldrich), Part Number 74658-5G, CAS No. 95-93-2, as a TraceCERT® certified reference material ( CRM ) standard for quantitative NMR...Sigma Aldrich), Part Number 74658-5G, CAS No. 95-93-2, as a TraceCERT® certified reference material ( CRM ) standard for quantitative NMR. The lot number

  15. A low-cost, Nist-traceable, high performance dielectric resonator Master Oscillator

    International Nuclear Information System (INIS)

    Doolittle, L.R.; Hovater, C.; Merminga, L.; Musson, J.; Wiseman, W.

    1999-01-01

    The current CEBAF Master Oscillator (MO) uses a quartz-based 10 MHz reference to synthesize 70 MHz and 499 MHz, which are then distributed to each of the klystron galleries on site. Due to the specialized nature of CEBAF's MO requirements, it has been determined that an in-house design and fabrication would provide a cost-effective alternative to purchasing or modifying vendor equipment. A Global Positioning System (GPS) disciplined, Direct Digital Synthesis (DDS) based MO is proposed which incorporates low-cost consumer RF components, designed for cellular communications. A 499 MHz Dielectric Resonant Oscillator (DRO) Voltage Controlled Oscillator (VCO) is phase-locked to a GPS-disciplined 10 MHz reference, and micro-tuned via a DDS, in an effort to achieve the lowest phase noise possible

  16. A response to: "NIST experts urge caution in use of courtroom evidence presentation method"

    OpenAIRE

    Morrison, Geoffrey Stewart

    2017-01-01

    A press release from the National Institute of Standards and Technology (NIST)could potentially impede progress toward improving the analysis of forensic evidence and the presentation of forensic analysis results in courts in the United States and around the world. "NIST experts urge caution in use of courtroom evidence presentation method" was released on October 12, 2017, and was picked up by the phys.org news service. It argues that, except in exceptional cases, the results of forensic ana...

  17. Performance Prediction of a MongoDB-Based Traceability System in Smart Factory Supply Chains

    Science.gov (United States)

    Kang, Yong-Shin; Park, Il-Ha; Youm, Sekyoung

    2016-01-01

    In the future, with the advent of the smart factory era, manufacturing and logistics processes will become more complex, and the complexity and criticality of traceability will further increase. This research aims at developing a performance assessment method to verify scalability when implementing traceability systems based on key technologies for smart factories, such as Internet of Things (IoT) and BigData. To this end, based on existing research, we analyzed traceability requirements and an event schema for storing traceability data in MongoDB, a document-based Not Only SQL (NoSQL) database. Next, we analyzed the algorithm of the most representative traceability query and defined a query-level performance model, which is composed of response times for the components of the traceability query algorithm. Next, this performance model was solidified as a linear regression model because the response times increase linearly by a benchmark test. Finally, for a case analysis, we applied the performance model to a virtual automobile parts logistics. As a result of the case study, we verified the scalability of a MongoDB-based traceability system and predicted the point when data node servers should be expanded in this case. The traceability system performance assessment method proposed in this research can be used as a decision-making tool for hardware capacity planning during the initial stage of construction of traceability systems and during their operational phase. PMID:27983654

  18. Performance Prediction of a MongoDB-Based Traceability System in Smart Factory Supply Chains.

    Science.gov (United States)

    Kang, Yong-Shin; Park, Il-Ha; Youm, Sekyoung

    2016-12-14

    In the future, with the advent of the smart factory era, manufacturing and logistics processes will become more complex, and the complexity and criticality of traceability will further increase. This research aims at developing a performance assessment method to verify scalability when implementing traceability systems based on key technologies for smart factories, such as Internet of Things (IoT) and BigData. To this end, based on existing research, we analyzed traceability requirements and an event schema for storing traceability data in MongoDB, a document-based Not Only SQL (NoSQL) database. Next, we analyzed the algorithm of the most representative traceability query and defined a query-level performance model, which is composed of response times for the components of the traceability query algorithm. Next, this performance model was solidified as a linear regression model because the response times increase linearly by a benchmark test. Finally, for a case analysis, we applied the performance model to a virtual automobile parts logistics. As a result of the case study, we verified the scalability of a MongoDB-based traceability system and predicted the point when data node servers should be expanded in this case. The traceability system performance assessment method proposed in this research can be used as a decision-making tool for hardware capacity planning during the initial stage of construction of traceability systems and during their operational phase.

  19. Performance Prediction of a MongoDB-Based Traceability System in Smart Factory Supply Chains

    Directory of Open Access Journals (Sweden)

    Yong-Shin Kang

    2016-12-01

    Full Text Available In the future, with the advent of the smart factory era, manufacturing and logistics processes will become more complex, and the complexity and criticality of traceability will further increase. This research aims at developing a performance assessment method to verify scalability when implementing traceability systems based on key technologies for smart factories, such as Internet of Things (IoT and BigData. To this end, based on existing research, we analyzed traceability requirements and an event schema for storing traceability data in MongoDB, a document-based Not Only SQL (NoSQL database. Next, we analyzed the algorithm of the most representative traceability query and defined a query-level performance model, which is composed of response times for the components of the traceability query algorithm. Next, this performance model was solidified as a linear regression model because the response times increase linearly by a benchmark test. Finally, for a case analysis, we applied the performance model to a virtual automobile parts logistics. As a result of the case study, we verified the scalability of a MongoDB-based traceability system and predicted the point when data node servers should be expanded in this case. The traceability system performance assessment method proposed in this research can be used as a decision-making tool for hardware capacity planning during the initial stage of construction of traceability systems and during their operational phase.

  20. Standards and measurements for assessing bone health-workshop report co-sponsored by the International Society for Clinical Densitometry (ISCD) and the National Institute of Standards and Technology (NIST).

    Science.gov (United States)

    Bennett, Herbert S; Dienstfrey, Andrew; Hudson, Lawrence T; Oreskovic, Tammy; Fuerst, Thomas; Shepherd, John

    2006-01-01

    This article reports and discusses the results of the recent ISCD-NIST Workshop on Standards and Measurements for Assessing Bone Health. The purpose of the workshop was to assess the status of efforts to standardize and compare results from dual-energy X-ray absorptiometry (DXA) scans, and then to identify and prioritize ongoing measurement and standards needs.

  1. 21 CFR 820.65 - Traceability.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Traceability. 820.65 Section 820.65 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES QUALITY SYSTEM REGULATION Identification and Traceability § 820.65 Traceability. Each manufacturer of a...

  2. Management traceability information system for the food supply chain

    Science.gov (United States)

    Bendriss, S.; Benabdelhafid, A.; Boukachour, J.

    2008-06-01

    For a long time, the traceability was applied only for management reasons, but with the advent of new communication and information technologies more and more used in the logistic medium, the notion of the traceability became new extensive to meet the new market needs in term of information by ensuring accessibility the data characteristic or been dependent on the product throughout its life cycle. On the basis of this postulate, we tried to raise some questions of research, beginning by the presentation of the progress achieved, assumptions and objective relating to the traceability, in the second time we mentioned principal work by showing how evolved the scientific question especially the information systems integrating the traceability were developed very little in the literature. Based on what was developed in the first part, we present our generic modeling approach of communicating product "smart object", able to take into account the various essential elements for its traceability: the product in its various states, various operations carried out on the product, resources used, its localization, and interactions between the product and its environment carried out on the basis of whole of service. In order to validate our generic modeling, a case of study representing an application in a context of food industry is presented.

  3. Modeling and Implementation of Cattle/Beef Supply Chain Traceability Using a Distributed RFID-Based Framework in China

    Science.gov (United States)

    Liang, Wanjie; Cao, Jing; Fan, Yan; Zhu, Kefeng; Dai, Qiwei

    2015-01-01

    In recent years, traceability systems have been developed as effective tools for improving the transparency of supply chains, thereby guaranteeing the quality and safety of food products. In this study, we proposed a cattle/beef supply chain traceability model and a traceability system based on radio frequency identification (RFID) technology and the EPCglobal network. First of all, the transformations of traceability units were defined and analyzed throughout the cattle/beef chain. Secondly, we described the internal and external traceability information acquisition, transformation, and transmission processes throughout the beef supply chain in detail, and explained a methodology for modeling traceability information using the electronic product code information service (EPCIS) framework. Then, the traceability system was implemented based on Fosstrak and FreePastry software packages, and animal ear tag code and electronic product code (EPC) were employed to identify traceability units. Finally, a cattle/beef supply chain included breeding business, slaughter and processing business, distribution business and sales outlet was used as a case study to evaluate the beef supply chain traceability system. The results demonstrated that the major advantages of the traceability system are the effective sharing of information among business and the gapless traceability of the cattle/beef supply chain. PMID:26431340

  4. Modeling and Implementation of Cattle/Beef Supply Chain Traceability Using a Distributed RFID-Based Framework in China.

    Science.gov (United States)

    Liang, Wanjie; Cao, Jing; Fan, Yan; Zhu, Kefeng; Dai, Qiwei

    2015-01-01

    In recent years, traceability systems have been developed as effective tools for improving the transparency of supply chains, thereby guaranteeing the quality and safety of food products. In this study, we proposed a cattle/beef supply chain traceability model and a traceability system based on radio frequency identification (RFID) technology and the EPCglobal network. First of all, the transformations of traceability units were defined and analyzed throughout the cattle/beef chain. Secondly, we described the internal and external traceability information acquisition, transformation, and transmission processes throughout the beef supply chain in detail, and explained a methodology for modeling traceability information using the electronic product code information service (EPCIS) framework. Then, the traceability system was implemented based on Fosstrak and FreePastry software packages, and animal ear tag code and electronic product code (EPC) were employed to identify traceability units. Finally, a cattle/beef supply chain included breeding business, slaughter and processing business, distribution business and sales outlet was used as a case study to evaluate the beef supply chain traceability system. The results demonstrated that the major advantages of the traceability system are the effective sharing of information among business and the gapless traceability of the cattle/beef supply chain.

  5. Bio-markers: traceability in food safety issues.

    Science.gov (United States)

    Raspor, Peter

    2005-01-01

    Research and practice are focusing on development, validation and harmonization of technologies and methodologies to ensure complete traceability process throughout the food chain. The main goals are: scale-up, implementation and validation of methods in whole food chains, assurance of authenticity, validity of labelling and application of HACCP (hazard analysis and critical control point) to the entire food chain. The current review is to sum the scientific and technological basis for ensuring complete traceability. Tracing and tracking (traceability) of foods are complex processes due to the (bio)markers, technical solutions and different circumstances in different technologies which produces various foods (processed, semi-processed, or raw). Since the food is produced for human or animal consumption we need suitable markers to be stable and traceable all along the production chain. Specific biomarkers can have a function in technology and in nutrition. Such approach would make this development faster and more comprehensive and would make possible that food effect could be monitored with same set of biomarkers in consumer. This would help to develop and implement food safety standards that would be based on real physiological function of particular food component.

  6. Molecular Markers for Food Traceability

    Directory of Open Access Journals (Sweden)

    Paula Martins-Lopes

    2013-01-01

    Full Text Available DNA analysis with molecular markers has opened a way to understand complex organism's genome. It is presently being widely applied across different fields, where food takes a preeminent position. Constant outbreaks of foodborne illnesses are increasing consumer's attention towards more detailed information related to what they are consuming. This overview reports on the areas where food traceability has been considered, and the problems that still remain to be bypassed in order to be widely applied. An outline of the most broadly used PCR-based methods for food traceability is described. Applications in the area of detection of genetically modified organisms, protected denomination of origin, allergenic and intolerance reactions are detailed in order to understand the dimension of the performed studies.

  7. NIST commitment to national MQA programs

    Energy Technology Data Exchange (ETDEWEB)

    Caswell, R.S. [National Institute of Standards and Technology, Gaithersburg, MD (United States)

    1993-12-31

    The program of the Ionizing Radiation Division, Physics Laboratory is discussed, especially relating to standards, calibrations, and measurement quality assurance (MQA). The NIST program is {open_quotes}vertically integrated,{close_quotes} meaning that activities extend from fundamental research to measurement research to supplying services and data. Typical methods NIST uses to assure the quality of the national standards are presented. Some of the programs in x-ray, gamma-ray, electron, neutron, and radioactivity research which support MQA are presented. Examples are given of MQA activities.

  8. NIST commitment to national MQA programs

    International Nuclear Information System (INIS)

    Caswell, R.S.

    1993-01-01

    The program of the Ionizing Radiation Division, Physics Laboratory is discussed, especially relating to standards, calibrations, and measurement quality assurance (MQA). The NIST program is open-quotes vertically integrated,close quotes meaning that activities extend from fundamental research to measurement research to supplying services and data. Typical methods NIST uses to assure the quality of the national standards are presented. Some of the programs in x-ray, gamma-ray, electron, neutron, and radioactivity research which support MQA are presented. Examples are given of MQA activities

  9. Traceability Method for Software Engineering Documentation

    OpenAIRE

    Nur Adila Azram; Rodziah Atan

    2012-01-01

    Traceability has been widely discussed in research area. It has been one of interest topic to be research in software engineering. Traceability in software documentation is one of the interesting topics to be research further. It is important in software documentation to trace out the flow or process in all the documents whether they depends with one another or not. In this paper, we present a traceability method for software engineering documentation. The objective of this research is to fac...

  10. NIST Photoionization of CO2 (ARPES) Database

    Science.gov (United States)

    SRD 119 NIST Photoionization of CO2 (ARPES) Database (Web, free access)   CO2 is studied using dispersed synchrotron radiation in the 650 Å to 850 Å spectral region. The vibrationally resolved photoelectron spectra are analyzed to generate relative vibrational transition amplitudes and the angular asymmetry parameters describing the various transitions observed.

  11. NIST: Information Management in the AMRF

    Science.gov (United States)

    Callaghan, George (Editor)

    1991-01-01

    The information management strategies developed for the NIST Automated Manufacturing Research Facility (AMRF) - a prototype small batch manufacturing facility used for integration and measurement related standards research are outlined in this video. The five major manufacturing functions - design, process planning, off-line programming, shop floor control, and materials processing are explained and their applications demonstrated.

  12. Reference metrology in a research fab: the NIST clean calibrations thrust

    Science.gov (United States)

    Dixson, Ronald; Fu, Joe; Orji, Ndubuisi; Renegar, Thomas; Zheng, Alan; Vorburger, Theodore; Hilton, Al; Cangemi, Marc; Chen, Lei; Hernandez, Mike; Hajdaj, Russell; Bishop, Michael; Cordes, Aaron

    2009-03-01

    In 2004, the National Institute of Standards and Technology (NIST) commissioned the Advanced Measurement Laboratory (AML) - a state-of-the-art, five-wing laboratory complex for leading edge NIST research. The NIST NanoFab - a 1765 m2 (19,000 ft2) clean room with 743 m2 (8000 ft2) of class 100 space - is the anchor of this facility and an integral component of the new Center for Nanoscale Science and Technology (CNST) at NIST. Although the CNST/NanoFab is a nanotechnology research facility with a different strategic focus than a current high volume semiconductor fab, metrology tools still play an important role in the nanofabrication research conducted here. Some of the metrology tools available to users of the NanoFab include stylus profiling, scanning electron microscopy (SEM), and atomic force microscopy (AFM). Since 2001, NIST has collaborated with SEMATECH to implement a reference measurement system (RMS) using critical dimension atomic force microscopy (CD-AFM). NIST brought metrology expertise to the table and SEMATECH provided access to leading edge metrology tools in their clean room facility in Austin. Now, in the newly launched "clean calibrations" thrust at NIST, we are implementing the reference metrology paradigm on several tools in the CNST/NanoFab. Initially, we have focused on calibration, monitoring, and uncertainty analysis for a three-tool set consisting of a stylus profiler, an SEM, and an AFM. Our larger goal is the development of new and supplemental calibrations and standards that will benefit from the Class 100 environment available in the NanoFab and offering our customers calibration options that do not require exposing their samples to less clean environments. Toward this end, we have completed a preliminary evaluation of the performance of these instruments. The results of these evaluations suggest that the achievable uncertainties are generally consistent with our measurement goals.

  13. Database setup insuring radiopharmaceuticals traceability

    International Nuclear Information System (INIS)

    Robert, N.; Salmon, F.; Clermont-Gallerande, H. de; Celerier, C.

    2002-01-01

    Having to organize radiopharmacy and to insure proper traceability of radiopharmaceutical medicines brings numerous problems, especially for the departments which are not assisted with global management network systems. Our work has been to find a solution enabling to use high street software to cover those needs. We have set up a PC database run by the Microsoft software ACCESS 97. Its use consists in: saving data related to generators, isotopes and kits reception and deletion, as well as the results of quality control; transferring data collected from the software that is connected to the activimeter (elutions and preparations registers, prescription book). By relating all the saved data, ACCESS enables to mix all information in order to proceed requests. At this stage, it is possible to edit all regular registers (prescription book, generator and radionuclides follow-up, blood derived medicines traceability) and to quickly retrieve patients who have received a particular radiopharmaceutical, or the radiopharmaceutical that has been given to a particular patient. This user-friendly database provides a considerable support to nuclear medicine department that don't possess any network management for their radiopharmaceutical activity. (author)

  14. Species specific isotope dilution for the accurate and SI traceable determination of arsenobetaine and methylmercury in cuttlefish and prawn

    Energy Technology Data Exchange (ETDEWEB)

    Kumkrong, Paramee [National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6 (Canada); Thailand Institute of Scientific and Technological Research, 35 Mu 3 Tambon Khlong Ha, Amphoe Khlong Luang, Pathum Thani, 12120 (Thailand); Thiensong, Benjaporn [Thailand Institute of Scientific and Technological Research, 35 Mu 3 Tambon Khlong Ha, Amphoe Khlong Luang, Pathum Thani, 12120 (Thailand); Le, Phuong Mai; McRae, Garnet; Windust, Anthony [National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6 (Canada); Deawtong, Suladda [Thailand Institute of Scientific and Technological Research, 35 Mu 3 Tambon Khlong Ha, Amphoe Khlong Luang, Pathum Thani, 12120 (Thailand); Meija, Juris; Maxwell, Paulette [National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6 (Canada); Yang, Lu, E-mail: Lu.yang@nrc-cnrc.gc.ca [National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6 (Canada); Mester, Zoltán [National Research Council Canada, 1200 Montreal Rd, Ottawa, Ontario, K1A 0R6 (Canada)

    2016-11-02

    Methods based on species specific isotope dilution were developed for the accurate and SI traceable determination of arsenobetaine (AsBet) and methylmercury (MeHg) in prawn and cuttlefish tissues by LC-MS/MS and SPME GC-ICPMS. Quantitation of AsBet and MeHg were achieved by using a {sup 13}C-enriched AsBet spike (NRC CRM CBET-1) and an enriched spike of Me{sup 198}Hg (NRC CRM EMMS-1), respectively, wherein analyte mass fractions in enriched spikes were determined by reverse isotope dilution using natural abundance AsBet and MeHg primary standards. Purity of these primary standards were characterized by quantitative {sup 1}H-NMR with the use of NIST SRM 350b benzoic acid as a primary calibrator, ensuring the final measurement results traceable to SI. Validation of employed methods of ID LC-MS/MS and ID SPME GC-ICPMS was demonstrated by analysis of several biological CRMs (DORM-4, TORT-3, DOLT-5, BCR-627 and BCR-463) with satisfying results. The developed methods were applied for the determination of AsBet and MeHg in two new certified reference materials (CRMs) prawn (PRON-1) and cuttlefish (SQID-1) produced jointly by Thailand Institute of Scientific and Technological Research (TISTR) and National Research Council Canada (NRC). With additional measurements of AsBet using LC-ICPMS with standard additions calibration and external calibration at NRC and TISTR, respectively, certified values of 1.206 ± 0.058 and 13.96 ± 0.54 mg kg{sup −1} for AsBet as As (expanded uncertainty, k = 2) were obtained for the new CRMs PRON-1 and SQID-1, respectively. The reference value of 0.324 ± 0.028 mg kg{sup −1} as Hg (expanded uncertainty, k = 2) for MeHg was obtained for the SQID-1 based on the results obtained by ID SPME GC-ICPMS method only, whereas MeHg in PRON-1 was found to be < 0.015 mg kg{sup −1}. It was found that AsBet comprised 69.7% and 99.0% of total As in the prawn and cuttlefish, respectively, whereas MeHg comprised 94.5% of total Hg in

  15. Species specific isotope dilution for the accurate and SI traceable determination of arsenobetaine and methylmercury in cuttlefish and prawn

    International Nuclear Information System (INIS)

    Kumkrong, Paramee; Thiensong, Benjaporn; Le, Phuong Mai; McRae, Garnet; Windust, Anthony; Deawtong, Suladda; Meija, Juris; Maxwell, Paulette; Yang, Lu; Mester, Zoltán

    2016-01-01

    Methods based on species specific isotope dilution were developed for the accurate and SI traceable determination of arsenobetaine (AsBet) and methylmercury (MeHg) in prawn and cuttlefish tissues by LC-MS/MS and SPME GC-ICPMS. Quantitation of AsBet and MeHg were achieved by using a "1"3C-enriched AsBet spike (NRC CRM CBET-1) and an enriched spike of Me"1"9"8Hg (NRC CRM EMMS-1), respectively, wherein analyte mass fractions in enriched spikes were determined by reverse isotope dilution using natural abundance AsBet and MeHg primary standards. Purity of these primary standards were characterized by quantitative "1H-NMR with the use of NIST SRM 350b benzoic acid as a primary calibrator, ensuring the final measurement results traceable to SI. Validation of employed methods of ID LC-MS/MS and ID SPME GC-ICPMS was demonstrated by analysis of several biological CRMs (DORM-4, TORT-3, DOLT-5, BCR-627 and BCR-463) with satisfying results. The developed methods were applied for the determination of AsBet and MeHg in two new certified reference materials (CRMs) prawn (PRON-1) and cuttlefish (SQID-1) produced jointly by Thailand Institute of Scientific and Technological Research (TISTR) and National Research Council Canada (NRC). With additional measurements of AsBet using LC-ICPMS with standard additions calibration and external calibration at NRC and TISTR, respectively, certified values of 1.206 ± 0.058 and 13.96 ± 0.54 mg kg"−"1 for AsBet as As (expanded uncertainty, k = 2) were obtained for the new CRMs PRON-1 and SQID-1, respectively. The reference value of 0.324 ± 0.028 mg kg"−"1 as Hg (expanded uncertainty, k = 2) for MeHg was obtained for the SQID-1 based on the results obtained by ID SPME GC-ICPMS method only, whereas MeHg in PRON-1 was found to be < 0.015 mg kg"−"1. It was found that AsBet comprised 69.7% and 99.0% of total As in the prawn and cuttlefish, respectively, whereas MeHg comprised 94.5% of total Hg in cuttlefish. - Highlights:

  16. Conversion Preliminary Safety Analysis Report for the NIST Research Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Diamond, D. J. [Brookhaven National Lab. (BNL), Upton, NY (United States); Baek, J. S. [Brookhaven National Lab. (BNL), Upton, NY (United States); Hanson, A. L. [Brookhaven National Lab. (BNL), Upton, NY (United States); Cheng, L-Y [Brookhaven National Lab. (BNL), Upton, NY (United States); Brown, N. [Brookhaven National Lab. (BNL), Upton, NY (United States); Cuadra, A. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2015-01-30

    The NIST Center for Neutron Research (NCNR) is a reactor-laboratory complex providing the National Institute of Standards and Technology (NIST) and the nation with a world-class facility for the performance of neutron-based research. The heart of this facility is the NIST research reactor (aka NBSR); a heavy water moderated and cooled reactor operating at 20 MW. It is fueled with high-enriched uranium (HEU) fuel elements. A Global Threat Reduction Initiative (GTRI) program is underway to convert the reactor to low-enriched uranium (LEU) fuel. This program includes the qualification of the proposed fuel, uranium and molybdenum alloy foil clad in an aluminum alloy, and the development of the fabrication techniques. This report is a preliminary version of the Safety Analysis Report (SAR) that would be submitted to the U.S. Nuclear Regulatory Commission (NRC) for approval prior to conversion. The report follows the recommended format and content from the NRC codified in NUREG-1537, “Guidelines for Preparing and Reviewing Applications for the Licensing of Non-power Reactors,” Chapter 18, “Highly Enriched to Low-Enriched Uranium Conversions.” The emphasis in any conversion SAR is to explain the differences between the LEU and HEU cores and to show the acceptability of the new design; there is no need to repeat information regarding the current reactor that will not change upon conversion. Hence, as seen in the report, the bulk of the SAR is devoted to Chapter 4, Reactor Description, and Chapter 13, Safety Analysis.

  17. Traceability in the food supply chain

    NARCIS (Netherlands)

    Kok, E.J.; Spiegel, van der M.; Prins, T.W.; Manti, V.; Groot, M.J.; Bremer, M.G.E.G.; Raamsdonk, van L.W.D.; Fels, van der H.J.; Ruth, van S.M.

    2012-01-01

    Traceability of food implies the ability to trace and follow a food, feed, or a food-producing animal or substance intended to be, or expected to be, incorporated into a food or feed, through all stages of production, processing, and distribution. The importance of traceability has grown due to the

  18. NFC-Based Traceability in the Food Chain

    Directory of Open Access Journals (Sweden)

    Danny Pigini

    2017-10-01

    Full Text Available In recent years, many events related to food and public health, such as bovine spongiform encephalopathy (BSE, commonly known as mad cow disease, dioxin, bird flu and swine flu, brought the issue of food security to the center of international attention. Many countries established strict rules to ensure the food traceability “from farm to fork” to meet the demand of consumer safety and to ensure public health. Consequently, the concepts of controlled supply chain, brand of quality and traceability of food products have had a strong evolution. Companies in the food production sector must evolve and change their organizational and management chain to satisfy increasingly stringent government rules and to respond to the requirements of the market. From this point of view, NFC (Near Field Communication has all the requirements to become the main technology for traceability in the various food sectors. This paper proposes a solution to gather information throughout the entire food supply chain and bring it directly to the consumer. The architecture consists of a complex identification system based on NFC tags, which cumulates data during all phases of the production process. The aim of this work is to keep track of the information generated during food processing, not only for traceability purposes, but also for enhancing and optimizing production. The data generated by the traceability system are collected in a cloud database through apps on Android smartphones. The information is accessible by the consumers through a public Android application. The pork supply chain has been used as an application example of the proposed methodology.

  19. NIST/ASME Steam Properties Database

    Science.gov (United States)

    SRD 10 NIST/ASME Steam Properties Database (PC database for purchase)   Based upon the International Association for the Properties of Water and Steam (IAPWS) 1995 formulation for the thermodynamic properties of water and the most recent IAPWS formulations for transport and other properties, this updated version provides water properties over a wide range of conditions according to the accepted international standards.

  20. The use of high accuracy NAA for the certification of NIST Standard Reference Materials

    International Nuclear Information System (INIS)

    Becker, D.A.; Greenberg, R.R.; Stone, S.

    1991-01-01

    Neutron activation analysis (NAA) is only one of many analytical techniques used at the National Institute of Standards and Technology (NIST) for the certification of NIST Standard Reference Materials (SRMs). We compete daily against all of the other available analytical techniques in terms of accuracy, precision, and the cost required to obtain that requisite accuracy and precision. Over the years, the authors have found that NAA can and does compete favorably with these other techniques because of its' unique capabilities for redundancy and quality assurance. Good examples are the two new NIST leaf SRMs, Apple Leaves (SRM 1515) and Peach Leaves (SRM 1547). INAA was used to measure the homogeneity of 12 elements in 15 samples of each material at the 100 mg sample size. In addition, instrumental and radiochemical NAA combined for 27 elemental determinations, out of a total of 54 elemental determinations made on each material with all NIST techniques combined. This paper describes the NIST NAA procedures used in these analyses, the quality assurance techniques employed, and the analytical results for the 24 elements determined by NAA in these new botanical SRMs. The NAA results are also compared to the final certified values for these SRMs

  1. CPTC and NIST-sponsored Yeast Reference Material Now Publicly Available | Office of Cancer Clinical Proteomics Research

    Science.gov (United States)

    The yeast protein extract (RM8323) developed by National Institute of Standards and Technology (NIST) under the auspices of NCI's CPTC initiative is currently available to the public at https://www-s.nist.gov/srmors/view_detail.cfm?srm=8323. The yeast proteome offers researchers a unique biological reference material. RM8323 is the most extensively characterized complex biological proteome and the only one associated with several large-scale studies to estimate protein abundance across a wide concentration range.

  2. Recent advance in DNA-based traceability and authentication of livestock meat PDO and PGI products.

    Science.gov (United States)

    Nicoloso, Letizia; Crepaldi, Paola; Mazza, Raffaele; Ajmone-Marsan, Paolo; Negrini, Riccardo

    2013-04-01

    This review updates the available molecular techniques and technologies and discusses how they can be used for traceability, food control and enforcement activities. The review also provides examples on how molecular techniques succeeded to trace back unknowns to their breeds of origin, to fingerprint single individuals and to generate evidence in court cases. The examples demonstrate the potential of the DNA based traceability techniques and explore possibilities for translating the next generation genomics tools into a food and feed control and enforcement framework.

  3. Recent Developments in the NIST Atomic Databases

    Science.gov (United States)

    Kramida, Alexander

    2011-05-01

    New versions of the NIST Atomic Spectra Database (ASD, v. 4.0) and three bibliographic databases (Atomic Energy Levels and Spectra, v. 2.0, Atomic Transition Probabilities, v. 9.0, and Atomic Line Broadening and Shapes, v. 3.0) have recently been released. In this contribution I will describe the main changes in the way users get the data through the Web. The contents of ASD have been significantly extended. In particular, the data on highly ionized tungsten (W III-LXXIV) have been added from a recently published NIST compilation. The tables for Fe I and Fe II have been replaced with newer, much more extensive lists (10000 lines for Fe I). The other updated or new spectra include H, D, T, He I-II, Li I-III, Be I-IV, B I-V, C I-II, N I-II, O I-II, Na I-X, K I-XIX, and Hg I. The new version of ASD now incorporates data on isotopes of several elements. I will describe some of the issues the NIST ASD Team faces when updating the data.

  4. Recent Developments in the NIST Atomic Databases

    International Nuclear Information System (INIS)

    Kramida, Alexander

    2011-01-01

    New versions of the NIST Atomic Spectra Database (ASD, v. 4.0) and three bibliographic databases (Atomic Energy Levels and Spectra, v. 2.0, Atomic Transition Probabilities, v. 9.0, and Atomic Line Broadening and Shapes, v. 3.0) have recently been released. In this contribution I will describe the main changes in the way users get the data through the Web. The contents of ASD have been significantly extended. In particular, the data on highly ionized tungsten (W III-LXXIV) have been added from a recently published NIST compilation. The tables for Fe I and Fe II have been replaced with newer, much more extensive lists (10000 lines for Fe I). The other updated or new spectra include H, D, T, He I-II, Li I-III, Be I-IV, B I-V, C I-II, N I-II, O I-II, Na I-X, K I-XIX, and Hg I. The new version of ASD now incorporates data on isotopes of several elements. I will describe some of the issues the NIST ASD Team faces when updating the data.

  5. Assessing Customer Satisfaction at the NIST Research Library: Essential Tool for Future Planning

    Science.gov (United States)

    Liu, Rosa; Allmang, Nancy

    2008-01-01

    This article describes a campus-wide customer satisfaction survey undertaken by the National Institute of Standards and Technology (NIST) Research Library in 2007. The methodology, survey instrument, data analysis, results, and actions taken in response to the survey are described. The outcome and recommendations will guide the library both…

  6. RFID Data Loggers in Fish Supply Chain Traceability

    Directory of Open Access Journals (Sweden)

    Mira Trebar

    2013-01-01

    Full Text Available Radio frequency identification (RFID is an innovative and well-recognized technology that supports all kinds of traceability systems in many areas. It becomes very important in the food industry where the electronic systems are used to capture the data in the supply chain. Additionally, RFID data loggers with sensors are available to perform a cold chain optimization for perishable foods. This paper presents the temperature monitoring solution at the box level in the fish supply chain as part of the traceability system implemented with RFID technology. RFID data loggers are placed inside the box to measure the temperature of the product and on the box for measuring ambient temperature. The results show that the system is very helpful during the phases of storage and transportation of fish to provide the quality control. The sensor data is available immediately at the delivery to be checked on the mobile RFID reader and afterwards stored in the traceability systems database to be presented on a web to stakeholders and private consumers.

  7. Design of a Distributed Food Traceability Platform and Its Application in Food Traceability at Guangdong Province

    Directory of Open Access Journals (Sweden)

    Luo Haibiao

    2017-01-01

    Full Text Available Food traceability is an important measure to secure food safety. This paper designed a food traceability platform based on distribution framework and implemented it in Guangdong province. The platform can provide traceability service, production and management service for food enterprise, provide forward and backward traceability of the whole cycle of food production and circulation, and provide various methods of food traceability for public. One characteristic of the platform is that it opens up the data flow among production, circulation and supervising departments, and builds a unified commodity circulation data pool. Based on the flow data pool, not only the production and circulation information of the food product can be traced, but also its inspection and quarantine information. Another characteristic of the platform is that its database and data interface were developed based on the fool electronic traceability standards formulated by the National Food and Drug Administration. Its interface standardization and compatibility with other food traceability platforms can thus be guaranteed. The platform is running at Guangdong province for key supervising products of Infant formula foods (including milk powder, rice flour, farina, etc, editable oil and liquor. The public can use the Guangdong food traceability portal, mobile APP, Wechat or the self-service terminals in the supermarkets to trace food products by scanning or input its traceability code or its product code and verify its authenticity. It will help to promote consumer confidence in food safety.

  8. Mutton Traceability Method Based on Internet of Things

    Directory of Open Access Journals (Sweden)

    Wu Min-Ning

    2014-01-01

    Full Text Available In order to improve the mutton traceability efficiency for Internet of Things and solve the problem of data transmission, analyzed existing tracking algorithm, proposed the food traceability application model, Petri network model of food traceability and food traceability of time series data of improved K-means algorithm based on the Internet of things. The food traceability application model to convert, integrate and mine the heterogeneous information, implementation of the food safety traceability information management, Petri network model for food traceability in the process of the state transition were analyzed and simulated and provides a theoretical basis to study the behavior described in the food traceability system and structural design. The experiments on simulation data show that the proposed traceability method based on Internet of Things is more effective for mutton traceability data than the traditional K-means methods.

  9. Risk Monitoring through Traceability Information Model

    OpenAIRE

    Juan P. Zamora; Wilson Adarme; Laura Palacios

    2012-01-01

    This paper shows a traceability framework for supply risk monitoring, beginning with the identification, analysis, and evaluation of the supply chain risk and focusing on the supply operations of the Health Care Institutions with oncology services in Bogota, Colombia. It includes a brief presentation of the state of the art of the Supply Chain Risk Management and traceability systems in logistics operations, and it concludes with the methodology to integrate the SCRM model with the traceabili...

  10. Traceability and uncertainty estimation in coordinate metrology

    DEFF Research Database (Denmark)

    Hansen, Hans Nørgaard; Savio, Enrico; De Chiffre, Leonardo

    2001-01-01

    National and international standards have defined performance verification procedures for coordinate measuring machines (CMMs) that typically involve their ability to measure calibrated lengths and to a certain extent form. It is recognised that, without further analysis or testing, these results...... are required. Depending on the requirements for uncertainty level, different approaches may be adopted to achieve traceability. Especially in the case of complex measurement situations and workpieces the procedures are not trivial. This paper discusses the establishment of traceability in coordinate metrology...

  11. Wine Traceability: A Data Model and Prototype in Albanian Context.

    Science.gov (United States)

    Vukatana, Kreshnik; Sevrani, Kozeta; Hoxha, Elira

    2016-02-17

    Vine traceability is a critical issue that has gained interest internationally. Quality control programs and schemes are mandatory in many countries including EU members and the USA. Albania has transformed most of the EU regulations on food into laws. Regarding the vine sector, the obligation of wine producers to keep traceability data is part of the legislation. The analysis on the interviews conducted with Albanian winemakers show that these data are actually recorded only in hard copy. Another fact that emerges from the interviews is that only two producers have implemented the ISO (International Organization for Standardization) standards on food. The purpose of this paper is to develop an agile and automated traceability system based on these standards. We propose a data model and system prototype that are described in the second and third section of this work. The data model is an adaption along the lines of the GS1 (Global Standards One) specifications for a wine supply chain. The proposed prototype has a key component that is mobile access to the information about wine through barcode technology. By using this mechanism the consumer obtains transparency on his expectations concerning the quality criteria. Another important component of the proposed system in this paper is a real-time notification module that works as an alert system when a risk is identified. This can help producers and authorities to have a rapid identification of a contaminated product. It is important in cases when recalling the product from the market or preventing it from reaching the consumer.

  12. Examination of quantitative accuracy of PIXE analysis for atmospheric aerosol particle samples. PIXE analysis of NIST air particulate on filter media

    International Nuclear Information System (INIS)

    Saitoh, Katsumi; Sera, Koichiro

    2005-01-01

    In order to confirm accuracy of the direct analysis of filter samples containing atmospheric aerosol particles collected on a polycarbonate membrane filter by PIXE, we carried out PIXE analysis on a National Institute of Standards and Technology (NIST, USA) air particulate on filter media (SRM 2783). For 16 elements with NIST certified values determined by PIXE analysis - Na, Mg, Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn and Pb - quantitative values were 80-110% relative to NIST certified values except for Na, Al, Si and Ni. Quantitative values of Na, Al and Si were 140-170% relative to NIST certified values, which were all high, and Ni was 64%. One possible reason why the quantitative values of Na, Al and Si were higher than the NIST certified values could be the difference in the X-ray spectrum analysis method used. (author)

  13. Modeling traceability information and functionality requirement in export-oriented tilapia chain.

    Science.gov (United States)

    Zhang, Xiaoshuan; Feng, Jianying; Xu, Mark; Hu, Jinyou

    2011-05-01

    Tilapia has been named as the 'food fish of the 21st century' and has become the most important farmed fish. China is the world leader in tilapia production and export. Identifying information and functional requirements is critical in developing an efficient traceability system because traceability has become a fundamental prerequisite for exporting aquaculture products. This paper examines the export-oriented tilapia chains and information flow in the chains, and identifies the key actors, information requirements and information-capturing points. Unified Modeling Language (UML) technology is adopted to describe the information and functionality requirement for chain traceability. The barriers of traceability system adoption are also identified. The results show that the traceability data consist of four categories that must be recorded by each link in the chain. The functionality requirement is classified into four categories from the fundamental information record to decisive quality control; the top three barriers to the traceability system adoption are: high costs of implementing the system, lack of experienced and professional staff; and low level of government involvement and support. Copyright © 2011 Society of Chemical Industry.

  14. Long-term temporal stability of the National Institute of Standards and Technology spectral irradiance scale determined with absolute filter radiometers

    International Nuclear Information System (INIS)

    Yoon, Howard W.; Gibson, Charles E.

    2002-01-01

    The temporal stability of the National Institute of Standards and Technology (NIST) spectral irradiance scale as measured with broadband filter radiometers calibrated for absolute spectral irradiance responsivity is described. The working standard free-electron laser (FEL) lamps and the check standard FEL lamps have been monitored with radiometers in the ultraviolet and the visible wavelength regions. The measurements made with these two radiometers reveal that the NIST spectral irradiance scale as compared with an absolute thermodynamic scale has not changed by more than 1.5% in the visible from 1993 to 1999. Similar measurements in the ultraviolet reveal that the corresponding change is less than 1.5% from 1995 to 1999. Furthermore, a check of the spectral irradiance scale by six different filter radiometers calibrated for absolute spectral irradiance responsivity based on the high-accuracy cryogenic radiometer shows that the agreement between the present scale and the detector-based scale is better than 1.3% throughout the visible to the near-infrared wavelength region. These results validate the assigned spectral irradiance of the widely disseminated NIST or NIST-traceable standard sources

  15. Traceability of optical roughness measurements on polymers

    DEFF Research Database (Denmark)

    De Chiffre, Leonardo; Gasparin, Stefania; Carli, Lorenzo

    2008-01-01

    -focus instrument, and a confocal microscope. Using stylus measurements as reference, parameter settings on the optical instruments were optimised and residual noise reduced by low pass filtering. Traceability of optical measurements could be established with expanded measuring uncertainties (k=2) of 4......An experimental investigation on surface roughness measurements on plastics was carried out with the objective of developing a methodology to achieve traceability of optical instruments. A ground steel surface and its replicas were measured using a stylus instrument, an optical auto......% for the auto-focus instrument and 10% for confocal microscope....

  16. Traceability in laboratories; Trazabilidad en laboratorios

    Energy Technology Data Exchange (ETDEWEB)

    Palacios, Tulio [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Centro Atomico Constituyentes; Peretti, Matilde; Saravi, Margarita [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Centro Atomico Ezeiza

    1996-07-01

    The testing and/or calibration laboratories main concern in to obtain reliability in the results delivered, therefore the accuracy and precision should be guaranteed. The regulations with respect to the quality systems makes special mention to the traceability in the equipment and in the measurements. In order to obtain that goal the laboratories are organized in national as well as in international nets to maintain the traceability to the primary standards. In the present work will be given the example of a particular laboratory in this regard. (author)

  17. Visualizing and Validating Metadata Traceability within the CDISC Standards.

    Science.gov (United States)

    Hume, Sam; Sarnikar, Surendra; Becnel, Lauren; Bennett, Dorine

    2017-01-01

    The Food & Drug Administration has begun requiring that electronic submissions of regulated clinical studies utilize the Clinical Data Information Standards Consortium data standards. Within regulated clinical research, traceability is a requirement and indicates that the analysis results can be traced back to the original source data. Current solutions for clinical research data traceability are limited in terms of querying, validation and visualization capabilities. This paper describes (1) the development of metadata models to support computable traceability and traceability visualizations that are compatible with industry data standards for the regulated clinical research domain, (2) adaptation of graph traversal algorithms to make them capable of identifying traceability gaps and validating traceability across the clinical research data lifecycle, and (3) development of a traceability query capability for retrieval and visualization of traceability information.

  18. NIST-Traceable NMR Method to Determine Quantitative Weight Percentage Purity of Nitrogen Mustard HN-3 Feedstock Samples

    Science.gov (United States)

    2013-08-01

    products . This report may not be cited for purposes of advertisement. This report has been approved for public release. Acknowledgments The...such as 0.01% ethylbenzene in deuterated acetone can be analyzed to check the signal response. The analysis of this sample can be done periodically as

  19. NIST-Traceable NMR Method to Determine Quantitative Weight Percentage Purity of Nitrogen Mustard HN-1 Feedstock Samples

    Science.gov (United States)

    2014-06-01

    constitute an official endorsement of any commercial products . This report may not be cited for purposes of endorsement. The text of this report is...such as 0.01% ethylbenzene in deuterated acetone can be analyzed to check the signal response on a continuing basis. This analysis can be done

  20. Metrological traceability of holmium oxide solution

    Science.gov (United States)

    Gonçalves, D. E. F.; Gomes, J. F. S.; Alvarenga, A. P. D.; Borges, P. P.; Araujo, T. O.

    2018-03-01

    Holmium oxide solution was prepared as a candidate of certified reference material for spectrophotometer wavelength scale calibration. Here is presented the necessary steps for evaluation of the uncertainty and the establishment of metrological traceability for the production of this material. Preliminary results from the first produced batch are shown.

  1. Deciding to Adopt Requirements Traceability in Practice

    NARCIS (Netherlands)

    Blaauboer, F.A.; Blaauboer, Floris; Sikkel, Nicolaas; Aydin, M.N.

    2007-01-01

    The use of requirements traceability for information systems development (ISD) projects is not very common in practice despite its often mentioned advantages in the literature. We conducted a case study in a large IT company to identify the factors that are relevant for the decision whether or not

  2. Value-Based Requirements Traceability: Lessons Learned

    Science.gov (United States)

    Egyed, Alexander; Grünbacher, Paul; Heindl, Matthias; Biffl, Stefan

    Traceability from requirements to code is mandated by numerous software development standards. These standards, however, are not explicit about the appropriate level of quality of trace links. From a technical perspective, trace quality should meet the needs of the intended trace utilizations. Unfortunately, long-term trace utilizations are typically unknown at the time of trace acquisition which represents a dilemma for many companies. This chapter suggests ways to balance the cost and benefits of requirements traceability. We present data from three case studies demonstrating that trace acquisition requires broad coverage but can tolerate imprecision. With this trade-off our lessons learned suggest a traceability strategy that (1) provides trace links more quickly, (2) refines trace links according to user-defined value considerations, and (3) supports the later refinement of trace links in case the initial value consideration has changed over time. The scope of our work considers the entire life cycle of traceability instead of just the creation of trace links.

  3. How traceability is restructuring Malawi's tobacco industry

    DEFF Research Database (Denmark)

    Moyer-Lee, Jason; Prowse, Martin

    farming offers merchants the ability to meet manufacturers’ compliance and traceability requirements. It also offers an opportunity for process and product upgrading by smallholders, but threatens to exclude poorer growers. The article concludes by outlining current contractual practices and the possible...... role of third parties in this rapid institutional evolution....

  4. Ethical traceability in the bacon supply chain

    DEFF Research Database (Denmark)

    Nielsen, Thorkild; Kristensen, Niels Heine

    2008-01-01

    The chapter describes how Danish consumers feel a need for more information about bacon production practices,especially about some of the invisible attributes, such as origin, use of medicine and animal welfare, even though there is a long tradition for highly developed traceability systems. Trac...

  5. Food quality and safety: traceability and labeling.

    Science.gov (United States)

    Lupien, John R

    2005-01-01

    This article discusses food systems in general, their development over the past 120 years, and realities and problems faced by a world population of over 6 billion people. Various food and feed problems are mentioned, and the concept of "traceability" is discussed in the context of the broader and more useful approach of using "good practices" at all levels of the food chain.

  6. Traceability and standardization of large dose measurement

    International Nuclear Information System (INIS)

    Tanaka, Ryuichi

    1989-01-01

    The reliability of dose control for radiation sterilization and food irradiation depends on the relative errors in measurements made by different dosimeters and the level of process control techniques as well as traceability. International efforts have been made for standardization of dose measurement procedures and process control techniques. A system for traceability of large dose measurement has already been established in the U.S. and Britain, and it has become urgent in Japan to establish a traceability system. For process control for radiation sterilization of medical tools, dose measurement is replacing the use of a biological indicator to play a more important role in relation to sterilization assurance. AAMI is making efforts to establish implementation standards for process control for industrial sterilization with electron beam. In Japan, the Radiation Irradiation Promotion Association has developed a manual 'Measurement of Dose of Electron Beam for Irradiation' to be used by users of electron beam for irradiation. Further efforts are required to establish a proper traceability system and standardization of dose measurement. (N.K.)

  7. NIST--Los Alamos racetrack microtron status

    International Nuclear Information System (INIS)

    Wilson, M.A.; Ayres, R.L.; Cutler, R.I.; Debenham, P.H.; Lindstrom, E.R.; Mohr, D.L.; Penner, S.; Rose, J.E.; Young, L.M.

    1988-01-01

    The NIST-Los Alamos Racetrack Microtron (RTM) is designed to deliver a low-emittance electron beam of up to 0.5 mA cw over an energy range of 17 MeV to 185 MeV. Fed by a 5 MeV injector, the RTM contains two 180 degree end magnets that recirculate the beam up to 15 times through a 12 MeV RF linac. The linac, which operates in a standing-wave mode at 2380 MHz, has been tested to nearly full RF power. At present, the injector has undergone beam tests, and the beam transport system is complete through the 12 MeV linac. A temporary beam line has been installed at the exit of one end magnet to measure the beam energy, energy spread, and emittance after one pass through the accelerator. Preliminary results indicate that the accelerated beam energy spread and emittance are within design goals. 4 refs., 7 figs

  8. Traceability of On-Machine Tool Measurement: A Review

    Science.gov (United States)

    Gomez-Acedo, Eneko; Kortaberria, Gorka; Olarra, Aitor

    2017-01-01

    Nowadays, errors during the manufacturing process of high value components are not acceptable in driving industries such as energy and transportation. Sectors such as aerospace, automotive, shipbuilding, nuclear power, large science facilities or wind power need complex and accurate components that demand close measurements and fast feedback into their manufacturing processes. New measuring technologies are already available in machine tools, including integrated touch probes and fast interface capabilities. They provide the possibility to measure the workpiece in-machine during or after its manufacture, maintaining the original setup of the workpiece and avoiding the manufacturing process from being interrupted to transport the workpiece to a measuring position. However, the traceability of the measurement process on a machine tool is not ensured yet and measurement data is still not fully reliable enough for process control or product validation. The scientific objective is to determine the uncertainty on a machine tool measurement and, therefore, convert it into a machine integrated traceable measuring process. For that purpose, an error budget should consider error sources such as the machine tools, components under measurement and the interactions between both of them. This paper reviews all those uncertainty sources, being mainly focused on those related to the machine tool, either on the process of geometric error assessment of the machine or on the technology employed to probe the measurand. PMID:28696358

  9. Rollout Strategy to Implement Interoperable Traceability in the Seafood Industry.

    Science.gov (United States)

    Gooch, Martin; Dent, Benjamin; Sylvia, Gilbert; Cusack, Christopher

    2017-08-01

    Verifying the accuracy and rigor of data exchanged within and between businesses for the purposes of traceability rests on the existence of effective and efficient interoperable information systems that meet users' needs. Interoperability, particularly given the complexities intrinsic to the seafood industry, requires that the systems used by businesses operating along the supply chain share a common technology architecture that is robust, resilient, and evolves as industry needs change. Technology architectures are developed through engaging industry stakeholders in understanding why an architecture is required, the benefits provided to the industry and individual businesses and supply chains, and how the architecture will translate into practical results. This article begins by reiterating the benefits that the global seafood industry can capture by implementing interoperable chain-length traceability and the reason for basing the architecture on a peer-to-peer networked database concept versus more traditional centralized or linear approaches. A summary of capabilities that already exist within the seafood industry that the proposed architecture uses is discussed; and a strategy for implementing the architecture is presented. The 6-step strategy is presented in the form of a critical path. © 2017 Institute of Food Technologists®.

  10. Traceability of On-Machine Tool Measurement: A Review.

    Science.gov (United States)

    Mutilba, Unai; Gomez-Acedo, Eneko; Kortaberria, Gorka; Olarra, Aitor; Yagüe-Fabra, Jose A

    2017-07-11

    Nowadays, errors during the manufacturing process of high value components are not acceptable in driving industries such as energy and transportation. Sectors such as aerospace, automotive, shipbuilding, nuclear power, large science facilities or wind power need complex and accurate components that demand close measurements and fast feedback into their manufacturing processes. New measuring technologies are already available in machine tools, including integrated touch probes and fast interface capabilities. They provide the possibility to measure the workpiece in-machine during or after its manufacture, maintaining the original setup of the workpiece and avoiding the manufacturing process from being interrupted to transport the workpiece to a measuring position. However, the traceability of the measurement process on a machine tool is not ensured yet and measurement data is still not fully reliable enough for process control or product validation. The scientific objective is to determine the uncertainty on a machine tool measurement and, therefore, convert it into a machine integrated traceable measuring process. For that purpose, an error budget should consider error sources such as the machine tools, components under measurement and the interactions between both of them. This paper reviews all those uncertainty sources, being mainly focused on those related to the machine tool, either on the process of geometric error assessment of the machine or on the technology employed to probe the measurand.

  11. Working Environment and Software Configuration Management Assimiliation using Traceability Enhancement Technique

    International Nuclear Information System (INIS)

    Iqbal, H.; Javed, A.; Majeed, M. N.

    2015-01-01

    Software Configuration Management (SCM) Systems are very useful in coordinating group effort in large and complex software systems. As a result of change in user requirement, market needs, tools, technology or new business goals emanate out, changes are continuously induced while developing the software product. For change management, Traceability technique and SCM are two prominent practices in the software development process. SCM helps in managing configuration items while traceability helps in tracing the knowledge about the configuration items. In this paper we propose a model of the SCM system with the working environment when changes are introduced in multiple artifacts and by which high quality products are developed. (author)

  12. Improving food safety in the supply chain: Integrating traceability in production and distribution planning

    DEFF Research Database (Denmark)

    Grunow, Martin; Rong, Aiying; Akkerman, Renzo

    2008-01-01

    on production and distribution planning. Here, we develop a methodology for production and distribution planning in food supply chains which minimizes production and logistics costs and at the same time reduces food safety concerns, limits the size of potential recalls, and satisfies product quality...... with traceability from the viewpoint of information system development and technology development such as radio frequency identification (RFID) and DNA-based techniques. However, traceability and its implications for food safety are thus far not incorporated in the standard operations management literature...

  13. Wine Traceability: A Data Model and Prototype in Albanian Context

    Directory of Open Access Journals (Sweden)

    Kreshnik Vukatana

    2016-02-01

    Full Text Available Vine traceability is a critical issue that has gained interest internationally. Quality control programs and schemes are mandatory in many countries including EU members and the USA. Albania has transformed most of the EU regulations on food into laws. Regarding the vine sector, the obligation of wine producers to keep traceability data is part of the legislation. The analysis on the interviews conducted with Albanian winemakers show that these data are actually recorded only in hard copy. Another fact that emerges from the interviews is that only two producers have implemented the ISO (International Organization for Standardization standards on food. The purpose of this paper is to develop an agile and automated traceability system based on these standards. We propose a data model and system prototype that are described in the second and third section of this work. The data model is an adaption along the lines of the GS1 (Global Standards One specifications for a wine supply chain. The proposed prototype has a key component that is mobile access to the information about wine through barcode technology. By using this mechanism the consumer obtains transparency on his expectations concerning the quality criteria. Another important component of the proposed system in this paper is a real-time notification module that works as an alert system when a risk is identified. This can help producers and authorities to have a rapid identification of a contaminated product. It is important in cases when recalling the product from the market or preventing it from reaching the consumer.

  14. Construction of Traceability System for Quality Safety of Cereal and Oil Products

    Science.gov (United States)

    Zheng, Huoguo; Liu, Shihong; Meng, Hong; Hu, Haiyan

    After several significant food safety incident, global food industry and governments in many countries are putting increasing emphasis on establishment of food traceability systems. Food traceability has become an effective way in food quality and safety management. The traceability system for quality safety of cereal and oil products was designed and implemented with HACCP and FMECA method, encoding, information processing, and hardware R&D technology etc, according to the whole supply chain of cereal and oil products. Results indicated that the system provide not only the management in origin, processing, circulating and consuming for enterprise, but also tracing service for customers and supervisor by means of telephone, internet, SMS, touch machine and mobile terminal.

  15. Analysis of Bone Meal (NIST 1486) and Bone Ash (NIST 1400) reference materials by neutron activation method; Analise de materiais de referencia Bone Meal (NIST 1486) e Bone Ash (NIST 1400) pelo metodo de ativacao com neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Takata, Marcelo K.; Saiki, Mitiko [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil); Borelli, Aurelio [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina

    1999-11-01

    In this work instrumental neutron activation analysis has been applied to determine Ba, ca, Cl, Cr, fe, Mg, Mn, Na, P, Sb, Sc, Sr and Zn in two biological reference materials NIST 1486 Bone Meal and NIST 1400 Bone Ash. The purpose of this work was to evaluate the precision and the accuracy of the results as well as to give a contribution to certificate these materials. Interferences found in the determination of some elements were also discussed. (author) 8 refs., 4 tabs.

  16. Reference materials and measurement traceability

    International Nuclear Information System (INIS)

    Bingham, C.D.

    1980-01-01

    Nuclear materials safeguards within the U.S.A. are accomplished by the integration of activities involving physical protection, material control and material accountability. Material accountability requires both sound measurement technology and well-defined accounting procedures to provide final evidence that physical protection and materials control have achieved their purpose. 5 refs

  17. 76 FR 67418 - Request for Comments on NIST Special Publication 500-293, US Government Cloud Computing...

    Science.gov (United States)

    2011-11-01

    ...-1659-01] Request for Comments on NIST Special Publication 500-293, US Government Cloud Computing... Publication 500-293, US Government Cloud Computing Technology Roadmap, Release 1.0 (Draft). This document is... (USG) agencies to accelerate their adoption of cloud computing. The roadmap has been developed through...

  18. The Application of the Internet of Things in the Field of Food Safety Traceability Technology%论物联网追溯技术在食品安全方面的应用

    Institute of Scientific and Technical Information of China (English)

    茹克百提·艾尔肯

    2014-01-01

    "back mode from farm to table", extraction, processing, production, consumption and so the supply of public circula-tion trace elements chain of consumer concern, the establishment of the whole life cycle of product traceability and recall, safe-guard the legitimate rights and interests of consumers from the source.%“从农田到餐桌”的追溯模式,提取了生产、加工、流通、消费等供应链环节消费者关心的公共追溯要素,建立全生命周期的产品可追溯与召回,从源头上保障消费者的合法权益。

  19. The NIST natural-matrix radionuclide standard reference material program for ocean studies

    International Nuclear Information System (INIS)

    Inn, K.G.W.; Zhichao Lin; Zhongyu Wu; MacMahon, C.; Filliben, J.J.; Krey, P.; Feiner, M.; Harvey, J.

    2001-01-01

    In 1997, the Low-level Working Group of the International Committee on Radionuclide Metrology met in Boston, MA (USA) to define the characteristics of a new set of environmental radioactivity reference materials. These reference materials were to provide the radiochemist with the same analytical challenges faced when assaying environmental samples. It was decided that radionuclide bearing natural materials should be collected from sites where there had been sufficient time for natural processes to redistribute the various chemically different species of the radionuclides. Over the succeeding years, the National Institute of Standards and Technology (NIST), in cooperation with other highly experienced laboratories, certified and issued a number of these as low-level radioactivity Standard Reference Materials (SRMs) for fission and activation product and actinide concentrations. The experience of certifying these SRMs has given NIST the opportunity to compare radioanalytical methods and learn of their limitations. NIST convened an international workshop in 1994 to define the natural-matrix radionuclide SRM needs for ocean studies. The highest priorities proposed at the workshop were for sediment, shellfish, seaweed, fish flesh and water matrix SRMs certified for mBq per sample concentrations of 90 Sr, 137 Cs and 239 Pu + 240 Pu. The most recent low-level environmental radionuclide SRM issued by NIST, Ocean Sediment (SRM 4357) has certified and uncertified values for the following 22 radionuclides: 40 K, 90 Sr, 129 I, 137 Cs, 155 Eu, 210 Pb, 210 Po, 212 Pb, 214 Bi, 226 Ra, 228 Ra, 228 Th, 230 Th, 232 Th, 234 U, 235 U, 237 Np, 238 U, 238 Pu, 239 Pu + 240 Pu, and 241 Am. The uncertainties for a number of the certified radionuclides are non-symmetrical and relatively large because of the non-normal distribution of reported values. NIST is continuing its efforts to provide the ocean studies community with additional natural matrix radionuclide SRMs. The freeze

  20. Traceability on radon measurements at the JAEA Ningyo-toge

    International Nuclear Information System (INIS)

    Ishimori, Yuu

    2007-01-01

    The study on the establishment and maintenance of the traceability on radon measurements at the Ningyo-toge Environmental Engineering Center of the Japan Atomic Energy Agency (JAEA Ningyo-toge) is illustrated in this paper. The primary standard is a radium solution provided by the National Bureau of Standard (present the National Institute of Standards and Technology) in the USA, and the secondary standard is the method with gas-filled ionization chambers calibrated with the solution. The radon reference chamber is utilized to provide reference atmospheres in calibration experiments for other monitors. Through the intercomparison experiments among the international reference institutes, it was confirmed that the reliability and consistency of the secondary standard of the JAEA Ningyo-toge have been retained since 1984. It shows that the calibration and measurement techniques associated with the traceability system constructed have been maintained well at the JAEA Ningyo-toge. Science there is no reference field as a national standard and no method regulated by the Japanese Industrial standard, this paper provides not only reliability and accuracy of the radon measurements at the JAEA Ningyo-toge, but also useful information for the standardization of radon measurements in Japan. (author)

  1. Towards traceable size determination of extracellular vesicles

    Directory of Open Access Journals (Sweden)

    Zoltán Varga

    2014-02-01

    Full Text Available Background: Extracellular vesicles (EVs have clinical importance due to their roles in a wide range of biological processes. The detection and characterization of EVs are challenging because of their small size, low refractive index, and heterogeneity. Methods: In this manuscript, the size distribution of an erythrocyte-derived EV sample is determined using state-of-the-art techniques such as nanoparticle tracking analysis, resistive pulse sensing, and electron microscopy, and novel techniques in the field, such as small-angle X-ray scattering (SAXS and size exclusion chromatography coupled with dynamic light scattering detection. Results: The mode values of the size distributions of the studied erythrocyte EVs reported by the different methods show only small deviations around 130 nm, but there are differences in the widths of the size distributions. Conclusion: SAXS is a promising technique with respect to traceability, as this technique was already applied for traceable size determination of solid nanoparticles in suspension. To reach the traceable measurement of EVs, monodisperse and highly concentrated samples are required.

  2. Blockchain protocols in clinical trials: Transparency and traceability of consent

    Science.gov (United States)

    Benchoufi, Mehdi; Porcher, Raphael; Ravaud, Philippe

    2018-01-01

    Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing for collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we build a consent workflow using a trending technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient’s consent collection using Blockchain, thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each protocol revision, consent was sought again.  We obtained a single document, in an open format, that accounted for the whole consent collection process: a time-stamped consent status regarding each version of the protocol. This document cannot be corrupted and can be checked on any dedicated public website. It should be considered a robust proof of data. However, in a live clinical trial, the authentication system should be strengthened to remove the need for third parties, here trial stakeholders, and give participative control to the peer users. In the future, the complex data flow of a clinical trial could be tracked by using Blockchain, which core functionality, named Smart Contract, could help prevent clinical trial events not occurring in the correct chronological order, for example including patients before they consented or analysing case report form data before freezing the database. Globally, Blockchain could help with reliability, security, transparency and could be

  3. Blockchain protocols in clinical trials: Transparency and traceability of consent.

    Science.gov (United States)

    Benchoufi, Mehdi; Porcher, Raphael; Ravaud, Philippe

    2017-01-01

    Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing for collection of patients' informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we build a consent workflow using a trending technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient's consent collection using Blockchain, thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each protocol revision, consent was sought again.  We obtained a single document, in an open format, that accounted for the whole consent collection process: a time-stamped consent status regarding each version of the protocol. This document cannot be corrupted and can be checked on any dedicated public website. It should be considered a robust proof of data. However, in a live clinical trial, the authentication system should be strengthened to remove the need for third parties, here trial stakeholders, and give participative control to the peer users. In the future, the complex data flow of a clinical trial could be tracked by using Blockchain, which core functionality, named Smart Contract, could help prevent clinical trial events not occurring in the correct chronological order, for example including patients before they consented or analysing case report form data before freezing the database. Globally, Blockchain could help with reliability, security, transparency and could be a

  4. Augmented halal food traceability system: analysis and design using UML

    Science.gov (United States)

    Usman, Y. V.; Fauzi, A. M.; Irawadi, T. T.; Djatna, T.

    2018-04-01

    Augmented halal food traceability is expanding the range of halal traceability in food supply chain where currently only available for tracing from the source of raw material to the industrial warehouse or inbound logistic. The halal traceability system must be developed in the integrated form that includes inbound and outbound logistics. The objective of this study was to develop a reliable initial model of integrated traceability system of halal food supply chain. The method was based on unified modeling language (UML) such as use case, sequence, and business process diagram. A goal programming model was formulated considering two objective functions which include (1) minimization of risk of halal traceability failures happened potentially during outbound logistics activities and (2) maximization of quality of halal product information. The result indicates the supply of material is the most important point to be considered in minimizing the risk of failure of halal food traceability system whereas no risk observed in manufacturing and distribution.

  5. Resolving traceability issues of product derivation for software product lines

    OpenAIRE

    Abid, Saad bin

    2009-01-01

    peer-reviewed Dealing with traceability management issues during model based product derivation in large complex industrial SPL is error prone due to the lack of tool support. As a result traceability management between connected models emerges as an important research topic. In this position paper, we discuss research challenges as scenarios from developed example product line and give recommendations on resolving traceability issues during product derivation. We also discuss initial idea...

  6. Traceability of radiation measurements: musings of a user

    International Nuclear Information System (INIS)

    Kathren, R.L.

    1980-04-01

    Although users of radiation desire measurement traceability for a number of reasons, including legal, regulatory, contractual, and quality assurance requirements, there exists no real definition of the term in the technical literature. Definitions are proposed for both traceability and traceability to the National Bureau of Standards. The hierarchy of radiation standards is discussed and allowable uncertainties are given for each level. Areas of need with respect to radiation standards are identified, and a system of secondary radiation calibration laboratories is proposed as a means of providing quality calibrations and traceability on a routine basis

  7. Traceability of radiation measurements: musings of a user

    Energy Technology Data Exchange (ETDEWEB)

    Kathren, R.L.

    1980-04-01

    Although users of radiation desire measurement traceability for a number of reasons, including legal, regulatory, contractual, and quality assurance requirements, there exists no real definition of the term in the technical literature. Definitions are proposed for both traceability and traceability to the National Bureau of Standards. The hierarchy of radiation standards is discussed and allowable uncertainties are given for each level. Areas of need with respect to radiation standards are identified, and a system of secondary radiation calibration laboratories is proposed as a means of providing quality calibrations and traceability on a routine basis.

  8. The spectral irradiance traceability chain at PTB

    International Nuclear Information System (INIS)

    Sperfeld, P.; Pape, S.; Nevas, S.

    2013-01-01

    Spectral irradiance is a fundamental radiometric unit. Its application to measurement results requires qualified traceability to basic units of the international system of units (Système international d’unités, SI). The Physikalisch-Technische Bundesanstalt (PTB) is amongst other national metrological institutes (NMIs) responsible for the realization, maintenance and dissemination of various radiometric and photometric units based on and traceable to national standards. The unit of spectral irradiance is realized and represented by a blackbody-radiator as the national primary standard of the PTB. Based on Planck’s radiation law, the irradiance is calculated and realized for any wavelength taking into account the exact knowledge of the radiation temperature and the geometrical parameters. Using a double-monochromator-based spectroradiometer system, secondary standard lamps can be calibrated by direct comparison to the blackbody-radiator (substitution method). These secondary standard lamps are then used at the PTB to calibrate standard lamps of customers. The customers themselves use these so-called transfer standards to calibrate their working standard lamps. These working standards are then used to calibrate own spectroradiometers or sources. This rather complex calibration chain is a common procedural method that for the customers generally leads to satisfying measurement results on site. Nevertheless, the standard lamps in use have to fulfill highest requirements concerning stability and reproducibility. Only this allows achieving comparably low transfer measurement uncertainties, which occur at each calibration step. Thus, the PTB is constantly investigating the improvement and further development of transfer standards and measurement methods for various spectral regions. The realization and dissemination of the spectral irradiance using the blackbody-radiator at the PTB is accomplished with worldwide approved minimized measurement uncertainties confirmed

  9. The spectral irradiance traceability chain at PTB

    Energy Technology Data Exchange (ETDEWEB)

    Sperfeld, P.; Pape, S.; Nevas, S. [Physikalisch-Technische Bundesanstalt, Bundesallee 10, 381160 Braunschweig (Germany)

    2013-05-10

    Spectral irradiance is a fundamental radiometric unit. Its application to measurement results requires qualified traceability to basic units of the international system of units (Systeme international d'unites, SI). The Physikalisch-Technische Bundesanstalt (PTB) is amongst other national metrological institutes (NMIs) responsible for the realization, maintenance and dissemination of various radiometric and photometric units based on and traceable to national standards. The unit of spectral irradiance is realized and represented by a blackbody-radiator as the national primary standard of the PTB. Based on Planck's radiation law, the irradiance is calculated and realized for any wavelength taking into account the exact knowledge of the radiation temperature and the geometrical parameters. Using a double-monochromator-based spectroradiometer system, secondary standard lamps can be calibrated by direct comparison to the blackbody-radiator (substitution method). These secondary standard lamps are then used at the PTB to calibrate standard lamps of customers. The customers themselves use these so-called transfer standards to calibrate their working standard lamps. These working standards are then used to calibrate own spectroradiometers or sources. This rather complex calibration chain is a common procedural method that for the customers generally leads to satisfying measurement results on site. Nevertheless, the standard lamps in use have to fulfill highest requirements concerning stability and reproducibility. Only this allows achieving comparably low transfer measurement uncertainties, which occur at each calibration step. Thus, the PTB is constantly investigating the improvement and further development of transfer standards and measurement methods for various spectral regions. The realization and dissemination of the spectral irradiance using the blackbody-radiator at the PTB is accomplished with worldwide approved minimized measurement uncertainties

  10. TRACEABILITY OF PRECISION MEASUREMENTS ON COORDINATE MEASURING MACHINES – TRACEABILITY, CALIBRATION AND PERFORMANCE VERIFICATION

    DEFF Research Database (Denmark)

    Bariani, Paolo; De Chiffre, Leonardo; Tosello, Guido

    This document is used in connection with an exercise of 1 hour duration as a part of the course VISION ONLINE – One week course on Precision & Nanometrology. The exercise concerns establishment of traceability of measurements with optical coordinate machine by mean of using two different calibrated...

  11. Traceability system for radioactivity standards in Japan

    International Nuclear Information System (INIS)

    Hino, Yoshio

    2000-01-01

    The electrotechnical laboratory (ETL) is the one of the largest national research institute, affiliated with the Ministry of International Trade and Industry (MITI). The ETL has a role to maintain the national standards of electricity, acoustics, visible light, ionizing radiation and radioactivity. The primary radioactivity standards have been established in ETL mainly with the 4πβ-γ coincidence method. The liquid scintillation counters and multi-wire proportional counters are also used for pure-beta and surface emission rate standards, respectively. As for the traceability, the primary standard sources are transferred to the Japan Radio Isotope Association (JRIA), and the JRIA measure these sources to calibrate their secondary standard equipments such as high pressurized 4π ionization chambers, high pore Ge and Nal (Tl) gamma spectrometers. The primary sources are also sent to the BIPM and neighboring countries for the intercomparisons to keep the consistency of the national standards. In this paper, these measurement techniques for the primary standardization and transfer system will be introduced, and some results of comparisons for certificate the traceability system will be described. (author)

  12. Wine Traceability with Rare Earth Elements

    Directory of Open Access Journals (Sweden)

    Maurizio Aceto

    2018-03-01

    Full Text Available The traceability of foodstuffs is now a relevant aspect of the food market. Scientific research has been devoted to addressing this issue by developing analytical protocols in order to find the link between soil and food items. In this view, chemical parameters that can act as soil markers are being sought. In this work, the role of rare earth elements (REEs as geochemical markers in the traceability of red wine is discussed. The REE distribution in samples from each step of the wine making process of Primitivo wine (produced in Southern Italy was determined using the highly sensitive inductively coupled plasma-mass spectrometry (ICP-MS technique. Samples analyzed include grapes, must, and wine samples after every step in the vinification process. The resulting data were compared to the REE distribution in the soil, revealing that the soil fingerprint is maintained in the intermediate products up to and including grape must. Fractionation occurs thereafter as a consequence of further external interventions, which tends to modify the REE profile.

  13. Method for traceable measurement of LTE signals

    Science.gov (United States)

    Sunder Dash, Soumya; Pythoud, Frederic; Leuchtmann, Pascal; Leuthold, Juerg

    2018-04-01

    This contribution presents a reference setup to measure the power of the cell-specific resource elements present in downlink long term evolution (LTE) signals in a way that the measurements are traceable to the international system of units. This setup can be used to calibrate the LTE code-selective field probes that are used to measure the radiation of base stations for mobile telephony. It can also be used to calibrate LTE signal generators and receivers. The method is based on traceable scope measurements performed directly at the output of a measuring antenna. It implements offline digital signal processing demodulation algorithms that consider the digital down-conversion, timing synchronization, frequency synchronization, phase synchronization and robust LTE cell identification to produce the downlink time-frequency LTE grid. Experimental results on conducted test scenarios, both single-input-single-output and multiple-input-multiple-output antenna configuration, show promising results confirming measurement uncertainties of the order of 0.05 dB with a coverage factor of 2.

  14. The NIST Step Class Library (Step Into the Future)

    Science.gov (United States)

    1990-09-01

    Figure 6. Excerpt from a STEP exclange file based on the Geometry model 1be NIST STEP Class Libary Page 13 An issue of concern in this...Scheifler, R., Gettys, J., and Newman, P., X Window System: C Library and Protocol Reference. Digital Press, Bedford, Mass, 1988. [Schenck90] Schenck, D

  15. Consumer perceptions of traceability: A cross-national comparison of the associated benefits

    NARCIS (Netherlands)

    Rijswijk, van W.; Frewer, L.J.; Menozzi, D.; Faioli, G.

    2008-01-01

    Consumer perceptions regarding traceability were investigated by means-end-chain laddering. Consumers in four European countries were questioned about the benefits they associate with traceability related attributes. The benefits consumers associate with traceability are in terms of health, quality,

  16. Emerging applications for traceability systems and implications for consumers

    NARCIS (Netherlands)

    Frewer, L.J.; Davies, O.H.; Rijswijk, W. van; Luijckx, N.L.; Ward, S.

    2008-01-01

    The modified European Food Law (General Food Law) has been emphasizing on the need to increase consumer confidence through implementation of regulatory measures focused on increased traceability in food chain. The implementation of effective traceability systems can provide the basis of

  17. Heavy subgraph pairs for traceability of block-chains

    NARCIS (Netherlands)

    Li, Binlong; Li, Binlong; Broersma, Haitze J.; Zhang, Shenggui

    2014-01-01

    A graph is called traceable if it contains a Hamilton path, i.e., a path containing all its vertices. Let G be a graph on n vertices. We say that an induced subgraph of G is o-1-heavy if it contains two nonadjacent vertices which satisfy an Ore-type degree condition for traceability, i.e., with

  18. Dissemination of 3D Visualizations of Complex Function Data for the NIST Digital Library of Mathematical Functions

    Directory of Open Access Journals (Sweden)

    Qiming Wang

    2007-03-01

    Full Text Available The National Institute of Standards and Technology (NIST is developing a digital library to replace the widely used National Bureau of Standards Handbook of Mathematical Functions published in 1964. The NIST Digital Library of Mathematical Functions (DLMF will include formulas, methods of computation, references, and links to software for over forty functions. It will be published both in hardcopy format and as a website featuring interactive navigation, a mathematical equation search, 2D graphics, and dynamic interactive 3D visualizations. This paper focuses on the development and accessibility of the 3D visualizations for the digital library. We examine the techniques needed to produce accurate computations of function data, and through a careful evaluation of several prototypes, we address the advantages and disadvantages of using various technologies, including the Virtual Reality Modeling Language (VRML, interactive embedded graphics, and video capture to render and disseminate the visualizations in an environment accessible to users on various platforms.

  19. Proceedings of the August 2011 Traceability Research Summit.

    Science.gov (United States)

    Bhatt, Tejas; Buckley, Greg; McEntire, Jennifer C

    2013-12-01

    IFT's Traceability Improvement Initiative aims to advance work in the area of food product tracing through several means including hosted events where thought leaders exchange knowledge and ideas. In August 2011, the Initiative, in collaboration with GS1 US, convened a group of 50 product tracing stakeholders, as a follow-on to a successful event the month prior. Representatives conducting pilots or implementation studies in produce, seafood, dairy, and other industries discussed the objectives, challenges and learnings. Some of the learnings from on-going initiatives included the sense that better information management provides a return of investment; data often exist but may not necessarily be appropriately linked through the supply chain; and enhanced product tracing enables better accountability and quality control. Challenges identified in enabling traceability throughout the supply chain were the distribution complexity; the need for training, communication, and collaboration; improving the reliability, quality and security of data captured, stored and shared as well as the importance of standards in data and interoperability of technology. Several approaches to overcoming these challenges were discussed. The first approach incrementally improves upon the current "one up/one down" system by requiring electronic records and tracking internal as well as external critical tracking events. The benefits of this approach are its similarity to existing regulatory requirements and low cost of implementation; resulting in a higher probability of adoption. The major disadvantage to this process is the longer response time required during a trace (back or forward). The second approach is similar to a "pedigree" approach where historical information about the food travels with it through the value chain. A major advantage of this approach is the quickest response time during a trace. Some of the disadvantages of this approach are potential for misuse of data, the volume

  20. Glance traceability – Web system for equipment traceability and radiation monitoring for the ATLAS experiment

    CERN Document Server

    Ramos de Azevedo Evora, L H; Pommes, K; Galvão, K K; Maidantchik, C

    2010-01-01

    During the operation, maintenance, and dismantling periods of the ATLAS Experiment, the traceability of all detector equipment must be guaranteed for logistic and safety matters. The running of the Large Hadron Collider will expose the ATLAS detector to radiation. Therefore, CERN must follow specific regulations from both the French and Swiss authorities for equipment removal, transport, repair, and disposal. GLANCE Traceability, implemented in C++ and Java/Java3D, has been developed to fulfill the requirements. The system registers and associates each equipment part to either a functional position in the detector or a zone outside the underground area through a 3D graphical user interface. Radiation control of the equipment is performed using a radiation monitor connected to the system: the local background gets stored and the threshold is automatically calculated. The system classifies the equipment as non radioactive if its radiation dose does not exceed that limit value. History for both location traceabi...

  1. Traceability in Model-Based Testing

    Directory of Open Access Journals (Sweden)

    Mathew George

    2012-11-01

    Full Text Available The growing complexities of software and the demand for shorter time to market are two important challenges that face today’s IT industry. These challenges demand the increase of both productivity and quality of software. Model-based testing is a promising technique for meeting these challenges. Traceability modeling is a key issue and challenge in model-based testing. Relationships between the different models will help to navigate from one model to another, and trace back to the respective requirements and the design model when the test fails. In this paper, we present an approach for bridging the gaps between the different models in model-based testing. We propose relation definition markup language (RDML for defining the relationships between models.

  2. Techniques and methods in nuclear materials traceability

    International Nuclear Information System (INIS)

    Persiani, P.J.

    1996-01-01

    The nonproliferation community is currently addressing concerns that the access to special nuclear materials may increase the illicit trafficking in weapons-usable materials from civil and/or weapons material stores and/or fuel cycles systems. Illicit nuclear traffic usually involves reduced quantities of nuclear materials perhaps as samplings of a potential protracted diversionary flow from sources to users. To counter illicit nuclear transactions requires the development of techniques and methods in nuclear material traceability as an important phase of a broad forensic analysis capability. This report discusses how isotopic signatures and correlation methods were applied to determine the origins of Highly Enriched Uranium (HEU) and Plutonium samples reported as illicit trafficking in nuclear materials

  3. RISIKO RANTAI PASOK MINUMAN SARI APEL DALAM PERSPEKTIF SISTEM TRACEABILITY

    Directory of Open Access Journals (Sweden)

    Dwi Iryaning Handayani

    2014-01-01

    Full Text Available Risiko merupakan faktor-faktor yang menghambat operasional pada rantai pasok makanan yang tidak dapat dihindari akan tetapi dapat diminimalisir atau dihilangkan dengan melakukan penanganan risiko yang tepat. Salah satu penanganan risiko dengan menggunakan sistem traceability. Oleh karena itu penelitian ini bertujuan untuk melakukan penaksiran risiko yang terjadi pada rantai pasok minuman sari apel berdasarkan informasi sistem traceability. Dalam penelitian ini menggunakan metode SCOR (Supply Chain Operation Reference. Sedangkan  penilaian risiko rantai pasok menggunakan teknik FMEA (Failure Mode and Effects Analysis. Upaya yang dilakukan dalam mengetahui risiko yang dapat ditangani dengan sistem traceability menggunakan metode House of Risk (HOR. Terdapat 1 risiko ekstrime yaitu risiko terjadinya kekurangan barang dan bahan baku digudang. Sedangkan risiko sedang sebanyak lima. Risiko yang berkatagori rendah sejumlah tujuh. Risiko yang terjadi disebabkan tidak ada prosedur yang jelas, kurang memperhatikan prosedur penyimpanan, inspeksi dilakukan di akhir proses dan kesalahan komposisi bahan baku, Sedangkan penyebab risiko yang bisa ditangani dengan traceability sebanyak 75% dari semua penyebab risiko yang terjadi. Hal ini menunjukkan bahwa peran traceability pada rantai pasok makanan dapat mereduksi risiko yang terjadi. Kata kunci:  risiko, traceability, rantai pasok   Abstract Risks are factors that hinder operations in the food supply chain that can not be avoided but can be minimized or eliminated by appropriate risk management . One risk management using a traceability system . Therefore, this study aims to conduct a risk assessment that occurs in apple juice supply chain traceability system based on information . In this study using the SCOR ( Supply Chain Operations Reference . While supply chain risk assessment using the technique of FMEA ( Failure Mode and Effects Analysis . Efforts are made to know the risks that can be addressed by

  4. Optimal Product Quality of Supply Chain Based on Information Traceability in Fashion and Textiles Industry: An Adverse Logistics Perspective

    Directory of Open Access Journals (Sweden)

    Zhaolin Cheng

    2013-01-01

    Full Text Available This paper investigates and compares two quality control methods, that is, inspection control and traceability control, to optimize supply chain quality in fashion and textiles industry. The objective is to maximize the supply chain participants’ expected profits and to achieve a Pareto improvement of supply chain product quality. With quality as a controllable variable indicating the level of opportunistic behavior, the return is interpreted as a function of quality: the higher the quality, the lower the return. Taking into account both quality and inventory quantity, we propose and compare the optimal decision-making models for three control methods of supply chain, respectively: decentralized (no control, inspection, and traceability. Further, we use a numerical example to illustrate the relationships among quality, profits, and quality-control cost coefficients (i.e., inspection-related cost and traceability-related cost. We then analyze and discuss the differences in the applications and scopes of the two control methods. On the one hand, given the poor standardization of fashion and textiles industry in the current practice (especially in China market, the cost of sampling inspection is relatively lower as compared to that of the traceability control method. On the other hand, with the improved industrial standardization and technology, traceability control tends to gain increasing advantages in cost and popularity.

  5. Characterization of sampling behavior for multielements in NIST SRM 2703

    International Nuclear Information System (INIS)

    Huang Donghui; Sun Hongchao; Ni Bangfa; Tian Weizhi; Wang Pingsheng; Liu CunXiong; Zhang Guiying; Xiao Caijin; Zhang Haiqing; Zhao Changjun; Zhang Yuanxun

    2011-01-01

    Sampling behavior of multielements for NIST SRM 2703, a marine sediment, was studied with sample sizes from 1 mg down to ng level by a combination of INAA, PIXE and SRXRF. On 1 mg sample size level, sampling behavior for multielements in NIST SRM 2703 and its parent SRM 2702 were comparatively characterized by using INAA combining with Ingamells model. Results showed that sampling uncertainties for 12 elements of both materials were found to be better than 1%, and those of four other elements in SRM 2703 better than in SRM 2702. At sample sizes not able to be accurately weighed (<1 mg), PIXE and SRXRF were used and the effective sample sizes estimated. Sampling uncertainties for nine elements were found to be better than 1% at sample sizes of tenth mg level, and those for six elements better than 10% on ng levels. (author)

  6. The reactor and cold neutron research facility at NIST

    Energy Technology Data Exchange (ETDEWEB)

    Prask, H J; Rowe, J M [Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD (United States)

    1992-07-01

    The NIST Reactor (NBSR) is a 20 MW research reactor located at the Gaithersburg, MD site, and has been in operation since 1969. It services 26 thermal neutron facilities which are used for materials science, chemical analysis, nondestructive evaluation, neutron standards work, and irradiations. In 1987 the Department of Commerce and NIST began development of the CNRF - a $30M National Facility for cold neutron research -which will provide fifteen new experimental stations with capabilities currently unavailable in this country. As of May 1992, four of the planned seven guides and a cold port were installed, eight cold neutron experimental stations were operational, and the Call for Proposals for the second cycle of formally-reviewed guest-researcher experiments had been sent out. Some details of the performance of instrumentation are described, along with the proposed design of the new hydrogen cold source which will replace the present D{sub 2}O/H{sub 2}O ice cold source. (author)

  7. The reactor and cold neutron research facility at NIST

    International Nuclear Information System (INIS)

    Prask, H.J.; Rowe, J.M.

    1992-01-01

    The NIST Reactor (NBSR) is a 20 MW research reactor located at the Gaithersburg, MD site, and has been in operation since 1969. It services 26 thermal neutron facilities which are used for materials science, chemical analysis, nondestructive evaluation, neutron standards work, and irradiations. In 1987 the Department of Commerce and NIST began development of the CNRF - a $30M National Facility for cold neutron research -which will provide fifteen new experimental stations with capabilities currently unavailable in this country. As of May 1992, four of the planned seven guides and a cold port were installed, eight cold neutron experimental stations were operational, and the Call for Proposals for the second cycle of formally-reviewed guest-researcher experiments had been sent out. Some details of the performance of instrumentation are described, along with the proposed design of the new hydrogen cold source which will replace the present D 2 O/H 2 O ice cold source. (author)

  8. Corrections of the NIST Statistical Test Suite for Randomness

    OpenAIRE

    Kim, Song-Ju; Umeno, Ken; Hasegawa, Akio

    2004-01-01

    It is well known that the NIST statistical test suite was used for the evaluation of AES candidate algorithms. We have found that the test setting of Discrete Fourier Transform test and Lempel-Ziv test of this test suite are wrong. We give four corrections of mistakes in the test settings. This suggests that re-evaluation of the test results should be needed.

  9. The liquid hydrogen moderator at the NIST research reactor

    International Nuclear Information System (INIS)

    Williams, Robert E.; Rowe, J. Michael; Kopetka, Paul

    1997-09-01

    In 1995, the NIST research reactor was shut down for a number of modifications, including the replacement of the D 2 O cold neutron source with a liquid hydrogen moderator. When the liquid hydrogen source began operating, the flux of cold neutrons increased by a factor of six over the D 2 O source. The design and operation of the hydrogen source are described, and measurements of its performance are compared with the Monte Carlo simulations used in the design. (auth)

  10. Forbidden subgraph pairs for traceability of block-chains

    Directory of Open Access Journals (Sweden)

    Binlong Li

    2013-04-01

    Full Text Available A block-chain is a graph whose block graph is a path, i.e. it is either a $P_1$, a $P_2$, or a 2-connected graph, or a graph of connectivity 1 with exactly two end-blocks. A graph is called traceable if it contains a Hamilton path. A traceable graph is clearly a block-chain, but the reverse does not hold in general.In this paper we characterize all pairs of connected graphs $\\{R,S\\}$ such that every $\\{R,S\\}$-free block-chain is traceable.

  11. Cattle traceability system in Japan for bovine spongiform encephalopathy

    Directory of Open Access Journals (Sweden)

    Katsuaki Sugiura

    2008-09-01

    Full Text Available To promote consumer confidence in the safety of beef and to ensure the proper implementation of eradication measures against bovine spongiform encephalopathy (BSE, the Cattle Traceability Law was approved by the Diet in June 2003 and a cattle traceability system has been in operation in Japan since December 2003. The system enables tracing the cohort and offspring animals of a BSE case within 24 h of its detection. The traceability database system also provides distributors, restaurants and consumers with information on the cattle from which the beef that they sell, serve and consume originate.

  12. [Preliminary studies on critical control point of traceability system in wolfberry].

    Science.gov (United States)

    Liu, Sai; Xu, Chang-Qing; Li, Jian-Ling; Lin, Chen; Xu, Rong; Qiao, Hai-Li; Guo, Kun; Chen, Jun

    2016-07-01

    As a traditional Chinese medicine, wolfberry (Lycium barbarum) has a long cultivation history and a good industrial development foundation. With the development of wolfberry production, the expansion of cultivation area and the increased attention of governments and consumers on food safety, the quality and safety requirement of wolfberry is higher demanded. The quality tracing and traceability system of production entire processes is the important technology tools to protect the wolfberry safety, and to maintain sustained and healthy development of the wolfberry industry. Thus, this article analyzed the wolfberry quality management from the actual situation, the safety hazard sources were discussed according to the HACCP (hazard analysis and critical control point) and GAP (good agricultural practice for Chinese crude drugs), and to provide a reference for the traceability system of wolfberry. Copyright© by the Chinese Pharmaceutical Association.

  13. Quality transitivity and traceability system of herbal medicine products based on quality markers.

    Science.gov (United States)

    Liu, Changxiao; Guo, De-An; Liu, Liang

    2018-05-15

    Due to a variety of factors to affect the herb quality, the existing quality management model is unable to evaluate the process control. The development of the concept of "quality marker" (Q-marker) lays basis for establishing an independent process quality control system for herbal products. To ensure the highest degree of safety, effectiveness and quality process control of herbal products, it is aimed to establish a quality transitivity and traceability system of quality and process control from raw materials to finished herbal products. Based on the key issues and challenges of quality assessment, the current status of quality and process controls from raw materials to herbal medicinal products listed in Pharmacopoeia were analyzed and the research models including discovery and identification of Q-markers, analysis and quality management of risk evaluation were designed. Authors introduced a few new technologies and methodologies, such as DNA barcoding, chromatographic technologies, fingerprint analysis, chemical markers, bio-responses, risk management and solution for quality process control. The quality and process control models for herbal medicinal products were proposed and the transitivity and traceability system from raw materials to the finished products was constructed to improve the herbal quality from the entire supply and production chain. The transitivity and traceability system has been established based on quality markers, especially on how to control the production process under Good Engineering Practices, as well as to implement the risk management for quality and process control in herbal medicine production. Copyright © 2018 Elsevier GmbH. All rights reserved.

  14. Findings and Recommendations from the NIST Workshop on Alternative Fuels and Materials: Biocorrosion.

    Science.gov (United States)

    Mansfield, Elisabeth; Sowards, Jeffrey W; Crookes-Goodson, Wendy J

    2015-01-01

    In 2013, the Applied Chemicals and Materials Division of the National Institute of Standards and Technology (NIST) hosted a workshop to identify and prioritize research needs in the area of biocorrosion. Materials used to store and distribute alternative fuels have experienced an increase in corrosion due to the unique conditions caused by the presence of microbes and the chemistry of biofuels and biofuel precursors. Participants in this workshop, including experts from the microbiological, fuel, and materials communities, delved into the unique materials and chemical challenges that occur with production, transport, and storage of alternative fuels. Discussions focused on specific problems including: a) the changing composition of "drop-in" fuels and the impact of that composition on materials; b) the influence of microbial populations on corrosion and fuel quality; and c) state-of-the-art measurement technologies for monitoring material degradation and biofilm formation.

  15. How to obtain traceability on optical radiation measurements?

    Science.gov (United States)

    Matamoros García, Carlos H.

    2006-02-01

    Traceability to national standards provides confidence in measurements results, granting a guaranty when carrying out governmental rules and when demonstrating conformity with quality requirements such as ISO 9000 or ISO/IEC 17025 (and the Mexican equivalent standards). The appropriate traceability contributes with confidence of the quality of products or services. This paper presents different ways to obtain traceability in Mexico for the optical radiation measurements, mentioning some applications, and highlighting the necessity of having traceability to the appropriate units of the SI. Additionally it present the national standards maintained by Centro Nacional de Metrologia (CENAM), the national metrology institute in Mexico, that give the technical support to Mexican measurements in this field and the international recognition that the personal of the Optics and Radiometry Division had gained in 10 years of development.

  16. [Establishment of traceability system of Chinese medicinal materials' quality].

    Science.gov (United States)

    Qi, Yao-dong; Gao, Shi-man; Liu, Hai-tao; Li, Xi-wen; Wei, Jian-he; Zhang, Ben-gang; Sun, Xiao-bo; Xiao, Pei-gen

    2015-12-01

    The quality of Chinese medicinal materials relates greatly to the clinical curative effect and security. In order to ensure the quality and safety of Chinese medicinal materials, a systematic and operable traceability system needs to be established. It can realize the whole process of quality and safety management of Chinese medicinal materials "from production to consumption" through recording and inquiring information and recalling defective products, which is an important direction for the future development of traditional Chinese medicine. But it is still at the exploration and trial stage. In this paper, a framework of Chinese medicinal materials' quality and safety traceability system was established on the basis of the domestic and international experience about the construction of food and agricultural products traceability systems. The relationship between traceability system of Chinese medicinal materials' quality and GAP, GMP, GSP was analyzed, and the possible problems and the corresponding solutions were discussed.

  17. Traceability, Liability, and Incentives for Food Safety and Quality

    OpenAIRE

    Sébastien Pouliot; Daniel A. Sumner

    2008-01-01

    Recent food scares such as the discoveries of Bovine Spongiform Encephalopathy and E. coli-contaminated spinach have heightened interest in food traceability. Here, we show how exogenous increases in food traceability create incentives for farms and marketing firms to supply safer food by increasing liability costs. We model a stylized marketing chain composed of farms, marketers, and consumers. Unsafe food for consumers can be caused by either marketers or farms. We show that food safety dec...

  18. Forbidden subgraph pairs for traceability of block-chains

    NARCIS (Netherlands)

    Li, Binlong; Li, Binlong; Broersma, Haitze J.; Zhang, Shenggui

    2013-01-01

    A block-chain is a graph whose block graph is a path, i.e. it is either a P1, a P2, or a 2-connected graph, or a graph of connectivity 1 with exactly two end-blocks. A graph is called traceable if it contains a Hamilton path. A traceable graph is clearly a block-chain, but the reverse does not hold

  19. Risiko Rantai Pasok Minuman Sari Apel Dalam Perspektif Sistem Traceability

    OpenAIRE

    Handayani, Dwi Iryaning

    2014-01-01

    Risiko merupakan faktor-faktor yang menghambat operasional pada rantai pasok makanan yang tidak dapat dihindari akan tetapi dapat diminimalisir atau dihilangkan dengan melakukan penanganan risiko yang tepat. Salah satu penanganan risiko dengan menggunakan sistem traceability. Oleh karena itu penelitian ini bertujuan untuk melakukan penaksiran risiko yang terjadi pada rantai pasok minuman sari apel berdasarkan informasi sistem traceability. Dalam penelitian ini menggunakan metode SCOR (Supply ...

  20. Tool-based requirement traceability between requirement and design artifacts

    CERN Document Server

    Turban, Bernhard

    2013-01-01

    Processes for developing safety-critical systems impose special demands on ensuring requirements traceability. Achieving valuable traceability information, however, is especially difficult concerning the transition from requirements to design. Bernhard Turban analyzes systems and software engineering theories cross-cutting the issue (embedded systems development, systems engineering, software engineering, requirements engineering and management, design theory and processes for safety-critical systems). As a solution, the author proposes a new tool approach to support designers in their thinkin

  1. RELAP-7 Code Assessment Plan and Requirement Traceability Matrix

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Junsoo; Choi, Yong-joon; Smith, Curtis L.

    2016-10-01

    The RELAP-7, a safety analysis code for nuclear reactor system, is under development at Idaho National Laboratory (INL). Overall, the code development is directed towards leveraging the advancements in computer science technology, numerical solution methods and physical models over the last decades. Recently, INL has also been putting an effort to establish the code assessment plan, which aims to ensure an improved final product quality through the RELAP-7 development process. The ultimate goal of this plan is to propose a suitable way to systematically assess the wide range of software requirements for RELAP-7, including the software design, user interface, and technical requirements, etc. To this end, we first survey the literature (i.e., international/domestic reports, research articles) addressing the desirable features generally required for advanced nuclear system safety analysis codes. In addition, the V&V (verification and validation) efforts as well as the legacy issues of several recently-developed codes (e.g., RELAP5-3D, TRACE V5.0) are investigated. Lastly, this paper outlines the Requirement Traceability Matrix (RTM) for RELAP-7 which can be used to systematically evaluate and identify the code development process and its present capability.

  2. AUTOMATION OF TRACEABILITY PROCESS AT GRAIN TERMINAL LLC “ UKRTRANSAGRO"

    Directory of Open Access Journals (Sweden)

    F. A. TRISHYN

    2017-07-01

    Full Text Available A positive trend of growth in both grain production and export is indicated. In the current marketing year the export potential of the Ukrainian grain market is close to the record level. However, the high positions in the rating of world exporters are achieved not only due to the high export potential, but also because of higher quality and logistics. These factors depend directly on the quality of enterprise management and all processes occurring at it. One of the perspective ways of enterprise development is the implementation of the traceability system and further automation of the traceability process. European integration laws are obliging Ukrainian enterprises to have a traceability system. Traceability is an ability to follow the movement of a feed or food through specified stages of production, processing and distribution. The process of traceability is managing by people, which implies a human factor. Automation will allow, in a greater extent, to exclude the human factor that will mean decreasing of errors in documentation and will speed up the process of grain transshipment. Research work on the process was carried out on the most modern grain terminal - LLC “UkrTransAgro”. The terminal is located in the Ukrainian water area of the Azov Sea (Mariupol, Ukraine. Characteristics of the terminal: capacity of a simultaneous storage - 48,120 thousand tons, acceptance of crops from transport - 4,500 tons / day; acceptance of crops from railway transport - 3000 tons / day, transshipment capacity - up to 1.2 million tons per year, shipment to the sea vessels - 7000 tons / day. The analysis of the automation level of the grain terminal is carried out. The company uses software from 1C - «1C: Enterprise 8. Accounting for grain elevator, mill, and feed mill for Ukraine». This software is used for quantitative and qualitative registration at the elevator in accordance with industry guidelines and standards. The software product has many

  3. PHYSICS AND SAFETY ANALYSIS FOR THE NIST RESEARCH REACTOR

    International Nuclear Information System (INIS)

    CHENG, L.; HANSON, A.; DIAMOND, D.; XU, J.; CAREW, J.; RORER, D.

    2004-01-01

    Detailed reactor physics and safety analyses have been performed for the 20 MW D 2 O moderated research reactor (NBSR) at the National Institute of Standards and Technology (NIST). The analyses provide an update to the Final Safety Analysis Report (FSAR) and employ state-of-the-art calculational methods. Three-dimensional Monte Carlo neutron and photon transport calculations were performed with the MCNP code to determine the safety parameters for the NBSR. The core depletion and determination of the fuel compositions were performed with MONTEBURNS. MCNP calculations were performed to determine the beginning, middle, and end-of-cycle power distributions, moderator temperature coefficient, and shim safety arm, beam tube and void reactivity worths. The calculational model included a plate-by-plate description of each fuel assembly, axial mid-plane water gap, beam tubes and the tubular geometry of the shim safety arms. The time-dependent analysis of the primary loop was determined with a RELAP5 transient analysis model that includes the pump, heat exchanger, fuel element geometry, and flow channels for both the six inner and twenty-four outer fuel elements. The statistical analysis used to assure protection from critical heat flux (CHF) was performed using a Monte Carlo simulation of the uncertainties contributing to the CHF calculation. The power distributions used to determine the local fuel conditions and margin to CHF were determined with MCNP. Evaluations were performed for the following accidents: (1) the control rod withdrawal startup accident, (2) the maximum reactivity insertion accident, (3) loss-of-flow resulting from loss of electrical power, (4) loss-of-flow resulting from a primary pump seizure, (5) loss-of-flow resulting from inadvertent throttling of a flow control valve, (6) loss-of-flow resulting from failure of both shutdown cooling pumps and (7) misloading of a fuel element. In both the startup and maximum reactivity insertion accidents, the core

  4. Quantum Information Experiments with Trapped Ions at NIST

    Science.gov (United States)

    Wilson, Andrew

    2015-03-01

    We present an overview of recent trapped-ion quantum information experiments at NIST. Advancing beyond few-qubit ``proof-of-principle'' experiments to the many-qubit systems needed for practical quantum simulation and information processing, without compromising on the performance demonstrated with small systems, remains a major challenge. One approach to scalable hardware development is surface-electrode traps. Micro-fabricated planar traps can have a number of useful features, including flexible electrode geometries, integrated microwave delivery, and spatio-temporal tuning of potentials for ion transport and spin-spin interactions. In this talk we report on a number of on-going investigations with surface traps. Experiments feature a multi-zone trap with closely spaced ions in a triangular arrangement (a first step towards 2D arrays of ions with tunable spin-spin interactions), a scheme for smooth transport through a junction in a 2D structure based on switchable RF potentials, and a micro-fabricated photo-detector integrated into a trap. We also give a progress report on our latest efforts to improve the fidelity of both optical and microwave 2-qubit gates. This work was supported by IARPA, ONR and the NIST Quantum Information Program. The 3-ion and switchable-RF-junction traps were developed in collaboration with Sandia National Laboratory.

  5. Heavy subgraph pairs for traceability of block-chains

    Directory of Open Access Journals (Sweden)

    Li Binlong

    2014-05-01

    Full Text Available A graph is called traceable if it contains a Hamilton path, i.e., a path containing all its vertices. Let G be a graph on n vertices. We say that an induced subgraph of G is o−1-heavy if it contains two nonadjacent vertices which satisfy an Ore-type degree condition for traceability, i.e., with degree sum at least n−1 in G. A block-chain is a graph whose block graph is a path, i.e., it is either a P1, P2, or a 2-connected graph, or a graph with at least one cut vertex and exactly two end-blocks. Obviously, every traceable graph is a block-chain, but the reverse does not hold. In this paper we characterize all the pairs of connected o−1-heavy graphs that guarantee traceability of block-chains. Our main result is a common extension of earlier work on degree sum conditions, forbidden subgraph conditions and heavy subgraph conditions for traceability

  6. Making traceability work across the entire food supply chain.

    Science.gov (United States)

    Bhatt, Tejas; Buckley, Greg; McEntire, Jennifer C; Lothian, Paul; Sterling, Brian; Hickey, Caitlin

    2013-12-01

    The Institute of Food Technologists held Traceability Research Summits on July 14, August 22, and November 1, 2011, to address how to meet the growing requirement for agriculture and food traceability. Each meeting had a group of about 50 individuals who came from food companies, trade associations, local, state, and federal governments, 3rd-party traceability solution providers, not-for-profit corporations, consultants, and consumer groups. They discussed and deliberated the objectives of traceability and the means to develop product tracing in the food system. A total of 70 people participated in the 3 summits. These individuals were invited to participate in a small workgroup responsible for considering the details related to product tracing and presenting draft concepts to the larger group on November 1, 2011, in Chicago. During this meeting, the larger assembly further refined the concepts and came to an agreement on the basic principles and overall design of the desired approach to traceability. © 2013 Institute of Food Technologists®

  7. Breed traceability of buffalo meat using microsatellite genotyping technique.

    Science.gov (United States)

    Kannur, Bheemashankar H; Fairoze, Md Nadeem; Girish, P S; Karabasanavar, Nagappa; Rudresh, B H

    2017-02-01

    Although buffalo has emerged as a major meat producing animal in Asia, major research on breed traceability has so far been focused on cattle (beef). This research gap on buffalo breed traceability has impelled development and validation of buffalo breed traceability using a set of eight microsatellite (STR) markers in seven Indian buffalo breeds (Bhadawari, Jaffaarabadi, Murrah, Mehsana, Nagpuri, Pandharpuri and Surti). Probability of sharing same profile by two individuals at a specific locus was computed considering different STR numbers, allele pooling in breed and population. Match probabilities per breed were considered and six most polymorphic loci were genotyped. Out of eight microsatellite markers studied, markers CSSMO47, DRB3 and CSSM060 were found most polymorphic. Developed technique was validated with known and unknown, blood and meat samples; wherein, samples were genetically traced in 24 out of 25 samples tested. Results of this study showed potential applications of the methodology and encourage other researchers to address the problem of buffalo traceability so as to create a world-wide archive of breed specific genotypes. This work is the first report of breed traceability of buffalo meat utilizing microsatellite genotyping technique.

  8. A Model of Traceability for Equipments Using RFID Tehnologies within an Integrated System

    Directory of Open Access Journals (Sweden)

    Radu LIXANDROIU

    2006-01-01

    Full Text Available Radio Frequency Identification (RFID is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tagss or transponders. An advanced automatic identification technology such as the Auto-ID system based on the Radio Frequency Identification (RFID technology has two values for inventory systems. First, the visibility provided by this technology allows an accurate knowledge on the inventory level by eliminating the discrepancy between inventory record and physical inventory. Second, the RFID technology can prevent or reduce the sources of errors. Benefits of using RFID include the reduction of labor costs, the simplification of business processes and the reduction of inventory inaccuracies. Also, RFID technology allows an knowledge on the traceability of equipments in a organization.

  9. Performance of the advanced cold neutron source and optics upgrades at the NIST Research Reactor

    International Nuclear Information System (INIS)

    Williams, R.E.; Kopetka, P.; Cook, J.C.; Rowe, J.M.

    2003-01-01

    On March 6, 2002, the NIST Research Reactor resumed routine operation following a six-month shutdown for facility upgrades and maintenance. During the shutdown, the original liquid hydrogen cold neutron source was removed, and the advanced cold source was installed. An optical filter was installed on one of the neutron guides, NG-3, replacing a crystal filter for the 30-m SANS instrument and the guide used between the chopper disks of the Disk Chopper time-of-flight Spectrometer (DCS) installed on NG-4 has been recently reconfigured. Additional improvements in the neutron optics of various instruments are being made. The advanced liquid hydrogen cold neutron source performs as expected, nearly doubling the flux available to most instruments. The measured gains range from about 1.4 at 2 A, to over a factor of two at 15 A. Also as expected, the heat load in the new source increased to 1200 watts, but the previously existing refrigerator has easily accommodated the increase. With intensity gains of a factor of two in the important long wavelength region of the spectrum, the advanced cold source significantly enhances the measurement capability of the cold neutron scattering instrumentation at NIST. The optical filter on NG-3 is also very successful; the 30-m SANS has an additional gain of two at 17 A. A system of refracting lenses and prisms near the SANS sample position has made possible measurements at low Q (0.0005 A -1 ) that were previously not feasible. The DCS has also seen additional intensity gain factors in excess of two for the majority of experiments and at short neutron wavelengths the gains exceed three. In addition, two new triple axis spectrometers will feature double-focusing monochromators in order to exploit the full size of the available thermal and cold neutron beam tubes. The success of the advanced cold source and enhanced neutron optics contributed to the recognition of the NIST Center for Neutron Research as 'the premiere neutron scattering

  10. Traceable calibration of impedance heads and artificial mastoids

    International Nuclear Information System (INIS)

    Scott, D A; Dickinson, L P; Bell, T J

    2015-01-01

    Artificial mastoids are devices which simulate the mechanical characteristics of the human head, and in particular of the bony structure behind the ear. They are an essential tool in the calibration of bone-conduction hearing aids and audiometers. With the emergence of different types of artificial mastoids in the market, and the realisation that the visco-elastic part of these instruments changes over time, the development of a method of traceable calibration of these devices without relying on commercial software has become important for national metrology institutes. This paper describes commercially available calibration methods, and the development of a traceable calibration method including the traceable calibration of the impedance head used to measure the mechanical impedance of the artificial mastoid. (paper)

  11. Traceability: a demand of agro industrial chain for special products

    Directory of Open Access Journals (Sweden)

    José Verissimo Foggiatto Silveira

    2007-10-01

    Full Text Available The inclusion of agricultural products with different nutritional features has altered the relationship, the upstream and the downstream of enterprises that produce and commercialize them. Coordination in the Agro Industrial System is demanded, including traceability as a way to guarantee the conformity of products, attending external clients and agricultural industries that require quality certification. This quality tool enables the identification of some details in the productive chain, such as seeds, farming, harvesting, storage, transportation and industrialization of products. Thus, this essay describes the concept of traceability and provides information of special products from a cooperative from Paraná, which has controlled process in the productive chain, demanded by contractual partnerships done with enterprises that provide fertilizers and food processors. It was identified that this cooperative commercializes three products that need traceability: two special kinds of corn and the regular kind of soybean.

  12. THE AUTHENTICITY AND TRACEABILITY OF FOOD – CONSUMERS PROTECTION FORM

    Directory of Open Access Journals (Sweden)

    PASCU EMILIA

    2013-07-01

    Full Text Available The quality of food is closely related with food safety, highlighted by their authenticity and traceability. Essentially the food it is a carrier of information, his quality reflecting off the capability of the body to decode them and so to provide a healthy lifestyle. Each individual, as well as the community, is preoccupied by the great problems of food, eating and the food behaviour, seeking the right solutions to the questions: what, how, when, and where do we eat to satisfy our physiological necessities. Food and food behaviour are essential determinants of our numerous pathologies, appreciating that many of the severe diseases may be prevented by lifestyle changes where the food is playing a key role. For authentic products, in this article there are presented information regarding benefits of traceability of products. The traceability of food products can be obtained by registering the ups and downs of the physical flux obtained during the production process. The objective of traceability is to obtain total control on products by individual and group identification to intervene in case of post-processing defects or any inconvenience. In traceability the "one step back, one step ahead" principle is applied. This means that any company has the obligation to have all the necessary information regarding the product, including the nature of raw and auxiliary materials and to possess information regarding the date and delivery destination. For the accomplishment of this wish, the individual identification of the goods, products, locations and place is indispensable. The traceability of the product is based on the identification code. It is monitored the changes that have occurred during the production processes, transport, storage and distribution flux.

  13. Traceability of Software Safety Requirements in Legacy Safety Critical Systems

    Science.gov (United States)

    Hill, Janice L.

    2007-01-01

    How can traceability of software safety requirements be created for legacy safety critical systems? Requirements in safety standards are imposed most times during contract negotiations. On the other hand, there are instances where safety standards are levied on legacy safety critical systems, some of which may be considered for reuse for new applications. Safety standards often specify that software development documentation include process-oriented and technical safety requirements, and also require that system and software safety analyses are performed supporting technical safety requirements implementation. So what can be done if the requisite documents for establishing and maintaining safety requirements traceability are not available?

  14. Implementing farm-to-fork traceability in Tanzania

    CSIR Research Space (South Africa)

    Van Dyk, FE

    2005-08-01

    Full Text Available stream_source_info Van Dyk2_2005.pdf.txt stream_content_type text/plain stream_size 10949 Content-Encoding UTF-8 stream_name Van Dyk2_2005.pdf.txt Content-Type text/plain; charset=UTF-8 Copyright @ CSIR 2005 www....csir.co.za Implementing farm-to-fork traceability in Tanzania Esbeth van Dyk CSIR Centre for Logistics ORSSA/SAIIE August 2005 Copyright @ CSIR 2005 www.csir.co.za Structure • Why traceability? • Legislation • Tanzania project • Recordkeeping in coffee...

  15. Traceability in the fish sector from research to commercial business

    DEFF Research Database (Denmark)

    Larsen, Erling

    the traceability information from the fishermen, it has been necessary to develop a new IT platform that can communicate with the official data collecting systems. At present nearly 90 % of all fish landed in Denmark is registrede in the central database, and the number of processing industries, wholesalers...... and retailers that are using the database are increasing steeply. In the near future another major step will be taken, due to an extensive investment program financed by the European Community, which will use the traceability data, from showing interactive information to the consumers to processing planning...

  16. Lightweight approach to model traceability in a CASE tool

    Science.gov (United States)

    Vileiniskis, Tomas; Skersys, Tomas; Pavalkis, Saulius; Butleris, Rimantas; Butkiene, Rita

    2017-07-01

    A term "model-driven" is not at all a new buzzword within the ranks of system development community. Nevertheless, the ever increasing complexity of model-driven approaches keeps fueling all kinds of discussions around this paradigm and pushes researchers forward to research and develop new and more effective ways to system development. With the increasing complexity, model traceability, and model management as a whole, becomes indispensable activities of model-driven system development process. The main goal of this paper is to present a conceptual design and implementation of a practical lightweight approach to model traceability in a CASE tool.

  17. Ultra-low level plutonium isotopes in the NIST SRM 4355A (Peruvian Soil-1)

    International Nuclear Information System (INIS)

    Inn, Kenneth G.W.; LaRosa, Jerome; Nour, Svetlana; Brooks, George; LaMont, Steve; Steiner, Rob; Williams, Ross; Patton, Brad; Bostick, Debbie; Eiden, Gregory; Petersen, Steve; Douglas, Matthew; Beals, Donna; Cadieux, James; Hall, Greg; Goldberg, Steve; Vogt, Stephan

    2009-01-01

    For more than 20 years, countries and their agencies which monitor radionuclide discharge sites and storage facilities have relied on the National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 4355 Peruvian Soil. Its low fallout contamination makes it an ideal soil blank for measurements associated with terrestrial-pathway-to-man studies. Presently, SRM 4355 is out of stock, and a new batch of the Peruvian soil is currently under development as future NIST SRM 4355A. Both environmental radioanalytical laboratories and mass spectrometry communities will benefit from the use of this SRM. The former must assess their laboratory procedural contamination and measurement detection limits by measurement of blank sample material. The Peruvian Soil is so low in anthropogenic radionuclide content that it is a suitable virtual blank. On the other hand, mass spectrometric laboratories have high sensitivity instruments that are capable of quantitative isotopic measurements at low plutonium levels in the SRM 4355 (first Peruvian Soil SRM) that provided the mass spectrometric community with the calibration, quality control, and testing material needed for methods development and legal defensibility. The quantification of the ultra-low plutonium content in the SRM 4355A was a considerable challenge for the mass spectrometric laboratories. Careful blank control and correction, isobaric interferences, instrument stability, peak assessment, and detection assessment were necessary. Furthermore, a systematic statistical evaluation of the measurement results and considerable discussions with the mass spectroscopy metrologists were needed to derive the certified values and uncertainties. The one sided upper limit of the 95% tolerance with 95% confidence for the massic 239 Pu content in SRM 4355A is estimated to be 54,000 atoms/g.

  18. 76 FR 58248 - Proposed Information Collection; Comment Request; NIST Three-Year Generic Request for Customer...

    Science.gov (United States)

    2011-09-20

    ... Collection; Comment Request; NIST Three-Year Generic Request for Customer Service-Related Data Collections... customers want and expect, as well as their satisfaction with and awareness of existing products, services, and information. In addition, NIST proposes other customer service satisfaction data collections that...

  19. 75 FR 18819 - Second DRAFT NIST Interagency Report (NISTIR) 7628, Smart Grid Cyber Security Strategy and...

    Science.gov (United States)

    2010-04-13

    ... a cyber attack. 2. It is essential that those parts or equipment of the Smart Grid that optimize the...-0143-01] Second DRAFT NIST Interagency Report (NISTIR) 7628, Smart Grid Cyber Security Strategy and... (NIST) seeks comments on the second draft of NISTIR 7628, Smart Grid Cyber Security Strategy and...

  20. Current tools and technologies for the identification and traceability

    NARCIS (Netherlands)

    Hogewerf, P.H.

    2013-01-01

    Radio frequency identification (RFID) systems were introduced in the 1970ies mainly for farm management purposes. They were followed in the 1990ies by the use of injectable transponders for companion animals. Since the beginning of this age, many countries have introduced animal identification

  1. Defining and Analyzing Traceability Systems in Food Supply Chains

    NARCIS (Netherlands)

    Scholten, H.; Verdouw, C.N.; Beulens, A.J.M.; Vorst, van der J.G.A.J.

    2016-01-01

    Traceability is considered to be a vital issue for all stakeholders in food supply chains. The most important driver is the increasing societal need to guarantee food quality and provenance. Because consumers cannot know in detail what processing steps are executed in the production of food and what

  2. Traceability in the pharmaceutical industry: application to radiopharmaceutical production

    International Nuclear Information System (INIS)

    Zanette, Camila; Melero, Laura T.U.H.; Araujo, Elaine B. de; Mengatti, Jair; Silva, Katia S. de S.

    2011-01-01

    The development of tools to promote the traceability of the drugs in the pharmaceutical industry during all the production chain is a necessary requisite. The traceability system is applied to enable the identification of the origin, destination and exact location of the drug. Traceability optimizes the process chain, reduces errors, is a requirement for quality process, promotes safety for the user and assists in pharmacovigilance. The health regulatory agency in Brazil (ANVISA) will implement a tracking system for medicaments with RDC no. 59 of 2009, to control distribution since the producer until the patients in order to prevent the traffic and adulteration of drugs. Thus, this study discusses the importance and impact of the new traceability system proposed by ANVISA in the production and distribution of radiopharmaceuticals from the Nuclear and Energy Research Institute (IPEN-CNEN). The radiopharmaceuticals have a difference track when compared with another drug classes. In this context, this RDC would increase the price of the medicines by up to 10%, since it provides deployment of a single stamp supplied by the Mint. Considering that radiopharmaceuticals are not sold to the final consumer (patients), but only for accredited medical clinics and nuclear medicine physicians, and the transport of radiopharmaceuticals is performed by specialized companies licensed by CNEN (National Nuclear Energy Commission), the use of the stamp to ensure authenticity and prevent falsification should not be appropriated and represents and additional cost for the radiopharmaceuticals. (author)

  3. Molecular traceability of beef from synthetic Mexican bovine breeds.

    Science.gov (United States)

    Rodríguez-Ramírez, R; Arana, A; Alfonso, L; González-Córdova, A F; Torrescano, G; Guerrero Legarreta, I; Vallejo-Cordoba, B

    2011-10-06

    Traceability ensures a link between carcass, quarters or cuts of beef and the individual animal or the group of animals from which they are derived. Meat traceability is an essential tool for successful identification and recall of contaminated products from the market during a food crisis. Meat traceability is also extremely important for protection and value enhancement of good-quality brands. Molecular meat traceability would allow verification of conventional methods used for beef tracing in synthetic Mexican bovine breeds. We evaluated a set of 11 microsatellites for their ability to identify animals belonging to these synthetic breeds, Brangus and Charolais/Brahman (78 animals). Seven microsatellite markers allowed sample discrimination with a match probability, defined as the probability of finding two individuals sharing by chance the same genotypic profile, of 10(-8). The practical application of the marker set was evaluated by testing eight samples from carcasses and pieces of meat at the slaughterhouse and at the point of sale. The DNA profiles of the two samples obtained at these two different points in the production-commercialization chain always proved that they came from the same animal.

  4. Can traceability improve consumers' confidence in food quality and safety?

    NARCIS (Netherlands)

    Rijswijk, van W.; Cornelisse-Vermaat, J.R.; Frewer, L.J.

    2006-01-01

    Abstract This paper investigates whether the implementation of traceability systems in line with the European General Food Law as well as food labelling laws related to allergens can impact on consumer confidence in food quality and safety. It aims to give insight into consumer demands regarding

  5. Consumer needs and requirements for food and ingredient traceability information

    NARCIS (Netherlands)

    Rijswijk, van W.; Frewer, L.J.

    2012-01-01

    The introduction of improved food traceability systems has aimed to restore consumer confidence in food safety and quality, in part by being able to provide consumers with more information about the origins of foods and food ingredients. However, little is known about consumers’ opinions and beliefs

  6. Experts' perspectives on the implementation of traceability in Europe

    NARCIS (Netherlands)

    Kher, S.V.; Frewer, L.J.; Jonge, J.de; Wentholt, M.; Davies, O.H.; Luijckx, N.B.L.; Cnossen, H.J.

    2010-01-01

    Purpose: The research presented in this paper aims at understanding the views of European food risk management experts on food traceability implementation, implementation of the general food law, and the advantages the system can offer for effective risk mitigation. Design/methodology/approach:

  7. EVALUASI PENDEKATAN PEMBANGUNAN TRACEABILITY LINK DALAM EVOLUSI PERANGKAT LUNAK

    Directory of Open Access Journals (Sweden)

    Noor Fitria A.

    2013-07-01

    Full Text Available Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Traceability merupakan hal penting pada proyek perangkat lunak, terutama pada proyek skala besar. Traceability berfungsi untuk mengetahui ketelusuran antar artefak dalam fase-fase yang berbeda (analisis kebutuhan, analisis desain, dan analisis implementasi maupun antara artefak dan pihak pengembang yang terlibat. Sistem traceability otomatis diperlukan untuk membangun ketelusuran antar artefak. Penelitian ini bertujuan untuk mengeksplorasi sejumlah literatur pendekatan terbaru yang digunakan untuk membangun traceability link. Eksplorasi literatur mengacu pada taksonomi berbasis evolusi perangkat lunak terhadap sejumlah mekanisme karakterisasi perubahan dan faktor-faktor yang mempengaruhi mekanisme. Hasil penelitian dapat digunakan untuk mengidentifikasi bagaimana pendekatan tersebut dapat mendukung evolusi perangkat lunak serta memberikan garis besar dari kriteria yang dibutuhkan untuk membangun metode traceability yang lebih baik. Kesimpulan dari penelitian ini adalah variasi faktor suatu pendekatan tidak berbeda jauh dengan pendekatan lainnya kecuali jika terdapat perbedaan pada faktor temporal.

  8. Traceable X,Y self-calibration at single nm level of an optical microscope used for coherence scanning interferometry

    Science.gov (United States)

    Ekberg, Peter; Mattsson, Lars

    2018-03-01

    Coherence scanning interferometry used in optical profilers are typically good for Z-calibration at nm-levels, but the X,Y accuracy is often left without further notice than typical resolution limits of the optics, i.e. of the order of ~1 µm. For the calibration of metrology tools we rely on traceable artefacts, e.g. gauge blocks for traditional coordinate measurement machines, and lithographically mask made artefacts for microscope calibrations. In situations where the repeatability and accuracy of the measurement tool is much better than the uncertainty of the traceable artefact, we are bound to specify the uncertainty based on the calibration artefact rather than on the measurement tool. This is a big drawback as the specified uncertainty of a calibrated measurement may shrink the available manufacturing tolerance. To improve the uncertainty in X,Y we can use self-calibration. Then, we do not need to know anything more than that the artefact contains a pattern with some nominal grid. This also gives the opportunity to manufacture the artefact in-house, rather than buying a calibrated and expensive artefact. The self-calibration approach we present here is based on an iteration algorithm, rather than the traditional mathematical inversion, and it leads to much more relaxed constrains on the input measurements. In this paper we show how the X,Y errors, primarily optical distortions, within the field of view (FOV) of an optical coherence scanning interferometry microscope, can be reduced with a large factor. By self-calibration we achieve an X,Y consistency in the 175  ×  175 µm2 FOV of ~2.3 nm (1σ) using the 50×  objective. Besides the calibrated coordinate X,Y system of the microscope we also receive, as a bonus, the absolute positions of the pattern in the artefact with a combined uncertainty of 6 nm (1σ) by relying on a traceable 1D linear measurement of a twin artefact at NIST.

  9. Case study on traceable, transparent documentation to support decision-making on nuclear waste disposal

    International Nuclear Information System (INIS)

    McNeish, J.A.; Andrews, R.W.; Sevougian, S.D.; Dockery, H.A.; Wilson, M.L.; Gauthier, J.H.; Barnard, R.W.; Gaither, K.N.

    1999-01-01

    The recent assessment of the Yucca Mountain potential repository attempted to develop transparent and traceable documentation. The assessment was largely successful in this effort, providing meaningful graphics and easy to understand descriptions of the analyses for multiple audiences. While there are obviously many areas in the modeling and data collection that could be improved with sufficient resources, the document has been well received as an accurate, understandable assessment of the analyses. A few difficulties were encountered in the efforts to produce transparent and traceable documentation of the performance assessment analyses. Streamlining the text from a typical technical document to more of a layman's document, was not always easy. The data transfer steps that are proceduralized were not always smooth, as we worked out some of the bugs in the data transfer system. For some of the graphics, there was a mismatch between the analyst's hardware/software and the production hardware/software, causing difficulties in printing the graphics. One thing that was clear as the many organizations worked to pull the document together, is that relationships between people are still necessary in spite of all the technology brought to bear on the problem. A high level of cooperation and integration is necessary for the process to work smoothly. Significant effort is being made to continue to improve the processes that lead to traceability. Multiple teams are taking the sequencing of models/data apart and finding all of the transfers required as the project moves toward Site Recommendation and potential licensing. Likewise, the effort to achieve transparency is evolving and will improve with the next iteration of the analyses

  10. Comparison of elemental quantity by PIXE and ICP-MS and/or ICP-AES for NIST standards

    International Nuclear Information System (INIS)

    Saitoh, K.; Sera, K.; Gotoh, T.; Nakamura, M.

    2002-01-01

    Urban particulate matter (SRM 1648), Buffalo River sediment (SRM 2704) and pine needle (SRM 1575) standard reference materials prepared by the National Institute of Standards and Technology (NIST, USA) were analyzed by three multi-element analysis methods, i.e., particle induced X-ray emission (PIXE), inductively coupled plasma-mass spectrometry (ICP-MS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES); values determined by those analysis methods were compared with certified and/or non-certified values of NIST samples. Values determined by PIXE were 70-120% relative to certified and/or non-certified values of NIST samples except for Co in the urban particulate matter, for V and Co in Buffalo River sediment and for Ni and Br in the pine needles samples. In particular, Al, K, Ca, Cr, Mn, Fe, Cu, Zn and Pb were 85-110% in all samples. On the other hand, Na and Fe values determined by ICP-MS were very much different from the certified values in all samples, but the other elements were 70-120%. As for ICP-AES, all elements except for Na were 80-100% in all samples. Comparing the values determined by PIXE and those determined by ICP-MS and/or ICP-AES, there was a slight difference between the samples, but the range was 75-120% except for Na, V, Fe and Co determined by ICP-MS and Na determined by ICP-AES, which was generally consistent with PIXE

  11. Maintaining Traceability in an Evolving Distributed Computing Environment

    Science.gov (United States)

    Collier, I.; Wartel, R.

    2015-12-01

    The management of risk is fundamental to the operation of any distributed computing infrastructure. Identifying the cause of incidents is essential to prevent them from re-occurring. In addition, it is a goal to contain the impact of an incident while keeping services operational. For response to incidents to be acceptable this needs to be commensurate with the scale of the problem. The minimum level of traceability for distributed computing infrastructure usage is to be able to identify the source of all actions (executables, file transfers, pilot jobs, portal jobs, etc.) and the individual who initiated them. In addition, sufficiently fine-grained controls, such as blocking the originating user and monitoring to detect abnormal behaviour, are necessary for keeping services operational. It is essential to be able to understand the cause and to fix any problems before re-enabling access for the user. The aim is to be able to answer the basic questions who, what, where, and when concerning any incident. This requires retaining all relevant information, including timestamps and the digital identity of the user, sufficient to identify, for each service instance, and for every security event including at least the following: connect, authenticate, authorize (including identity changes) and disconnect. In traditional grid infrastructures (WLCG, EGI, OSG etc.) best practices and procedures for gathering and maintaining the information required to maintain traceability are well established. In particular, sites collect and store information required to ensure traceability of events at their sites. With the increased use of virtualisation and private and public clouds for HEP workloads established procedures, which are unable to see 'inside' running virtual machines no longer capture all the information required. Maintaining traceability will at least involve a shift of responsibility from sites to Virtual Organisations (VOs) bringing with it new requirements for their

  12. 41Ca standardization by the CIEMAT/NIST LSC method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Los Arcos, J.M.

    1996-01-01

    A procedure for the liquid scintillation counting standardization of the electron-capture nuclide 41 Ca has been successfully developed and applied with 41 CaCl 2 and 41 Ca-(HDEHP) n samples synthesized in the laboratory from 41 CaCO 3 supplied by Oak Ridge National Laboratory. Six scintillators were tested: the organic samples were stable in toluene-alcohol, Ultima-Gold TM and HiSafe III TM for 30 d, whereas the inorganic samples were only stable in toluene-alcohol and HiSafe III TM for the same period of time. Despite of the low counting efficiencies (1%-13%) due to the very low-energy of less than 3.6 keV of the X-rays and Auger electrons of 41 Ca, the stable samples were standardized by the CIEMAT/NIST method to a combined uncertainty of 2.4% over a range of figures of merit of 1.75 to 7.25 ( 3 H equivalent efficiency of 40% to 7%). (orig.)

  13. 76 FR 3877 - Effectiveness of Federal Agency Participation in Standardization in Select Technology Sectors for...

    Science.gov (United States)

    2011-01-21

    .... Health Information Technology. 3. Cyber Security. 4. Emergency Communications Interoperability. 5... and Business Affairs at [email protected] or 301-975-NIST (6478). SUPPLEMENTARY INFORMATION: On...

  14. Standardized and Repeatable Technology Evaluation for Cybersecurity Acquisition

    Science.gov (United States)

    2017-02-01

    financial benefit for adopting a cybersecurity technology. 2.2 TECHNOLOGY SELECTION Often organizations will adopt frameworks (e.g., NIST, ISO - 27000 , or...security managers. Many organizations use the NIST1, ISO -270002, or COBIT frameworks3, but for smaller organizations, these frameworks can be overly

  15. Development and evaluation of an intelligent traceability system for frozen tilapia fillet processing.

    Science.gov (United States)

    Xiao, Xinqing; Fu, Zetian; Qi, Lin; Mira, Trebar; Zhang, Xiaoshuan

    2015-10-01

    The main export varieties in China are brand-name, high-quality bred aquatic products. Among them, tilapia has become the most important and fast-growing species since extensive consumer markets in North America and Europe have evolved as a result of commodity prices, year-round availability and quality of fresh and frozen products. As the largest tilapia farming country, China has over one-third of its tilapia production devoted to further processing and meeting foreign market demand. Using by tilapia fillet processing, this paper introduces the efforts for developing and evaluating ITS-TF: an intelligent traceability system integrated with statistical process control (SPC) and fault tree analysis (FTA). Observations, literature review and expert questionnaires were used for system requirement and knowledge acquisition; scenario simulation was applied to evaluate and validate ITS-TF performance. The results show that traceability requirement is evolved from a firefighting model to a proactive model for enhancing process management capacity for food safety; ITS-TF transforms itself as an intelligent system to provide functions on early warnings and process management by integrated SPC and FTA. The valuable suggestion that automatic data acquisition and communication technology should be integrated into ITS-TF was achieved for further system optimization, perfection and performance improvement. © 2014 Society of Chemical Industry.

  16. Implementing traceability using particle randomness-based textile printed tags

    Science.gov (United States)

    Agrawal, T. K.; Koehl, L.; Campagne, C.

    2017-10-01

    This article introduces a random particle-based traceability tag for textiles. The proposed tag not only act as a unique signature for the corresponding textile product but also possess the features such as easy to manufacture and hard to copy. It seeks applications in brand authentication and traceability in textile and clothing (T&C) supply chain. A prototype has been developed by screen printing process, in which micron-scale particles were mixed with the printing paste and printed on cotton fabrics to attain required randomness. To encode the randomness, the image of the developed tag was taken and analyzed using image processing. The randomness of the particles acts as a product key or unique signature which is required to decode the tag. Finally, washing and abrasion resistance tests were conducted to check the durability of the printed tag.

  17. Application of Stable Isotope Signatures in Food Traceability

    International Nuclear Information System (INIS)

    Nazaratul Ashifa Abdullah Salim; Roslanzairi Mostapha; Zainon Othman; Nor Afiqah Harun; Mohd Suhaimi Hamzah; Shamsiah Abdul Rahman; Md Suhaimi Elias; Salmah Moosa

    2015-01-01

    Stable isotope analysis has widely been used to trace the origin of organic materials in various fields, such as geochemistry, biochemistry, archaeology and petroleum. In past a decade, it has also become an important tool for food traceability study. The globalization of food markets and the relative ease with which food commodities are transported through and between countries and continents, means that consumers are increasingly concerned about the origin of the foods they eat. The natural abundance isotope variation such as carbon, nitrogen, hydrogen and oxygen are use as geographic tracers or marker to determine the geographic origin of fruits, crop, vegetables and food products from animal. The isotopic compositions of plant materials reflect various factors such as isotopic compositions of source materials and their assimilation processes as well as growth environments. This paper will discuss on stable carbon and nitrogen isotopic compositions in rice, advantages, limitations and potential of other analysis applications that can be incorporated in food traceability system. (author)

  18. Supervised and Unsupervised Speaker Adaptation in the NIST 2005 Speaker Recognition Evaluation

    National Research Council Canada - National Science Library

    Hansen, Eric G; Slyh, Raymond E; Anderson, Timothy R

    2006-01-01

    Starting in 2004, the annual NIST Speaker Recognition Evaluation (SRE) has added an optional unsupervised speaker adaptation track where test files are processed sequentially and one may update the target model...

  19. Traceable calibration of photovoltaic reference cells using natural sunlight

    Science.gov (United States)

    Müllejans, H.; Zaaiman, W.; Pavanello, D.; Dunlop, E. D.

    2018-02-01

    At the European Solar Test Installation (ESTI) photovoltaic (PV) reference cells are calibrated traceably to SI units via the World Radiometric Reference (WRR) using natural sunlight. The Direct Sunlight Method (DSM) is described in detail and the latest measurement results and an updated uncertainty budget are reported. These PV reference cells then provide a practical means for measuring the irradiance of natural or simulated sunlight during the calibration of other PV devices.

  20. Traceability and Demand Sensitiveness: Evidences from Italian Fresh Potatoes Consumption

    Directory of Open Access Journals (Sweden)

    Francesco Caracciolo

    2011-02-01

    Full Text Available When a traceability system takes place, either when mandatory or voluntary, many questions arise that need to be addressed and answered. One of the firsts concerns whether it introduces new costs with no gain in efficiency or, on the contrary, the system efficiency increases lowering costs and, as a consequence, market price of the good in hand. Among others, another issue that only rarely is addressed regards the effect of a price change on the final market. The objective of this paper was to simulate the effect on fresh Italian vegetables market of prices change due to a newer traceability procedure, focusing on early potato. Reasons why early potato was the main object of our study will be explained in detail later in the paper. Moreover, this study concerns a demand system estimation that has, as main goal, the measurement of own and cross price elasticities as well as expenditure elasticities. Such estimations are not strictly related with traceability because they measure any change in quantity demanded due to price changes due to any market perturbation. However, since early potato is experiencing a peculiar market and chain change in Italy, our simulation is meant to reason in terms of a “what if” approach, formally simulating the effect of any change in price due to an hypothesis of traceability system involved. In order to estimate a demand system, real household consumption data (3,000 observations of a statistically representative sample of the Italian population of households was taken into account. Relevant measures of market variables were estimated by means of a Linear Almost Ideal Demand System implementing a large set of fresh vegetables: potato split in early and late, cabbage, salad, mushrooms, fruits vegetables, roots, asparagus, onion, tomatoes, peppers, cucumbers, beans, zucchinis and others.

  1. Activity measurements of the radionuclide 109Cd for the PTB, Germany and the NIST, USA in the ongoing comparison BIPM.RI(II)-K1.Cd-109

    International Nuclear Information System (INIS)

    Ratel, G.; Michotte, C.; Janssen, H.; Kossert, K.; Lucas, L.; Karam, L.

    2005-01-01

    In 2004, the Physikalisch-Technische Bundesanstalt (PTB, Germany) and the National Institute of Standards and Technology (NIST, USA) each submitted one sample of known activity of 109 Cd to the International Reference System (SIR). The PTB result replaces their previous measurement of 1994 and the NIST result updates their 1986 CCRI(II) comparison result. The values of the activity submitted were about 15 MBq and 42 MBq. The new key comparison results have replaced the earlier values in the matrix of degrees of equivalence that now contains six results, identifier BIPM.RI(II)-K1.Cd-109, to which the remaining eleven results from the CCRI(II)-K2.Cd-109 held in 1986 are still linked. (authors)

  2. Traceability and measurement uncertainty in sample preparation (W5)

    International Nuclear Information System (INIS)

    Wegscheider, W.; Walner, U.; Moser, J.

    2002-01-01

    Full text: Very few chemical measurements are being made directly on the object of interest and sample preparation is thus the rule rather than the exception in daily practice. Unfortunately the operations undertaken in the course of sample preparation are prone to rendering a sample useless for the purpose of interpreting a measurement performed on it, as it might not represent the original and relevant status any longer. Sample preparation along with sampling itself constitutes therefore a procedure that leads to a loss of representation of the original specimen or population. On the other hand it is also not sufficient to confine aspects of traceability and measurement uncertainty to the ultimate measurement, as the key purpose of measuring is to supply adequate data for some kind of decision, be it in production, in health, in the environment, or indeed in any other circumstance. These considerations have led to severe confusion in the community as to what traceability really means in chemistry. CITAC and EURACHEM have only recently issued a preliminary document that clarifies these issues and gives a firm handle on the future development of quality assurance in analytical chemistry. In this talk it will be attempted to outline the general ideas and procedures that lead to traceability of analytical chemical results accompanied by valid statements of their uncertainty. It will be argued that the central element in achieving these goals is a well-designed validation study that frequently goes beyond those requirements currently laid out in official documents. (author)

  3. Traceability and quality control in mammography: measurements and models

    International Nuclear Information System (INIS)

    Peixoto, Jose Guilherme Pereira

    2002-10-01

    The success of a treatment or diagnosis using radiation, depends on the optimization of the dose determination to be administered for the patient and on the beam radiation quality. It is recognized by the international guidelines that it is necessary to improve calibration services for mammography beams in order to improve the quality of clinical diagnosis. Major efforts have been made by several laboratories in order to establish an appropriate and traceable calibration infrastructure and to provide the basis for a quality control program in mammography. The contribution of the radiation metrology network to the mammography services is reviewed in this work. Steps required for the implementation of a mammography calibration system using a constant potential x-ray and a clinical mammography x-ray machine are presented. The various qualities of mammography radiation discussed in this work are in accordance with the IEC 61674 and the AAPM recommendations. This work also presents the methodology and the procedures to maintain and to disseminate the traceability at the x-ray mammography range, describing the interlaboratory comparison performed at LNMRI/IRD/CNEN and at the IPEN/CNEN using the secondary standard ionization chambers traceable with the international standard. It assesses the inter-laboratory comparison consistency and decides whether a questionable value should or not be accepted, using the residual method. This thesis discusses the uncertainties involved in all steps of the calibration chain in accord once with the ISO recommendations. (author)

  4. Framework for Design of Traceability System on Organic Rice Certification

    Science.gov (United States)

    Purwandoko, P. B.; Seminar, K. B.; Sutrisno; Sugiyanta

    2018-05-01

    Nowadays, the preferences of organic products such as organic rice have been increased. It because of the people awareness of the healthy and eco-friendly food product consumption has grown. Therefore, it is very important to ensure organic quality of the product that will be produced. Certification is a series of process that holds to ensure the quality of products meets all criteria of organic standards. Currently, there is a problem that traceability information system for organic rice certification has been not available. The current system still conducts manually caused the loss of information during storage process. This paper aimed at developing a traceability framework on organic rice certification process. First, the main discussed issues are organic certification process. Second, unified modeling language (UML) is used to build the model of user requirement in order to develop traceability system for all actors in the certification process. Furthermore, the information captured model along certification process will be explained in this paper. The model shows the information flow that has to be recorded for each actor. Finally, the challenges in the implementation system will be discussed in this paper.

  5. Linking live animals and products: traceability.

    Science.gov (United States)

    Britt, A G; Bell, C M; Evers, K; Paskin, R

    2013-08-01

    It is rarely possible to successfully contain an outbreak of an infectious animal disease, or to respond effectively to a chemical residue incident, without the use of a system for identifying and tracking animals. The linking of animals at the time they are slaughtered--through the use of identification devices or marks and accompanying movement documentation--with the meat produced from their carcasses, adds further value from the perspective of consumer safety. Over the past decade, animal identification technology has become more sophisticated and affordable. The development of the Internet and mobile communication tools, complemented bythe expanded capacity of computers and associated data management applications, has added a new dimension to the ability of Competent Authorities and industry to track animals and the food they produce for disease control, food safety and commercial purposes.

  6. Visualizing Magnetic domain of Electric Steel using Grating Interferometer at NG6 of NIST

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Young Ju; Oh, Oh Sung; Lee, Se Ho; Kim, Dae Seung; Lee, Seung Wook [Pusan National University, Busan (Korea, Republic of); Kim, Jong Yul [KAERI, Daejeon (Korea, Republic of); Kwon, Oh Yeoul [Pohang Iron and Steel Company, Pohang (Korea, Republic of); Hussey, D. S.; Jacobson, D. L.; Lamannad, J. M. [NIST, Gaithersburg (United States)

    2016-05-15

    The Grating Interferometer is one of new imaging techniques provides improved contrast images, Phase Contrast Image and Dark-Field Image, which have never been seen before by conventional radiography. Neutron Dark-Field Imaging (NDFI) suggests new approach for material science providing the scattering image caused by the micro-structure of object. We attracted to the application of NDFI for material science, the electric steel which produce magnetic scattering information especially. In this study, we developed 1 dimensional gratings using gadox filling method to make the Talbot-Lau Interferometer (TLI). The experiment was conducted at cold neutron imaging facility NG6 of National Institute of Standards and Technologies, NIST. We confirmed that the 3 order Talbot-Lau type of neutron grating interferometer which is composed of gratings made by gadox filling method is well operated at cold neutron imaging beamline. NDFI is definitely powerful visualizing tool for material science, especially magnetic materials. In further study, we will research electric steel more in realistic conditions when it is worked as a component of electric motor.

  7. Measured Polarized Spectral Responsivity of JPSS J1 VIIRS Using the NIST T-SIRCUS

    Science.gov (United States)

    McIntire, Jeff; Young, James B.; Moyer, David; Waluschka, Eugene; Xiong, Xiaoxiong

    2015-01-01

    Recent pre-launch measurements performed on the Joint Polar Satellite System (JPSS) J1 Visible Infrared Imaging Radiometer Suite (VIIRS) using the National Institute of Standards and Technology (NIST) Traveling Spectral Irradiance and Radiance Responsivity Calibrations Using Uniform Sources (T-SIRCUS) monochromatic source have provided wavelength dependent polarization sensitivity for select spectral bands and viewing conditions. Measurements were made at a number of input linear polarization states (twelve in total) and initially at thirteen wavelengths across the bandpass (later expanded to seventeen for some cases). Using the source radiance information collected by an external monitor, a spectral responsivity function was constructed for each input linear polarization state. Additionally, an unpolarized spectral responsivity function was derived from these polarized measurements. An investigation of how the centroid, bandwidth, and detector responsivity vary with polarization state was weighted by two model input spectra to simulate both ground measurements as well as expected on-orbit conditions. These measurements will enhance our understanding of VIIRS polarization sensitivity, improve the design for future flight models, and provide valuable data to enhance product quality in the post-launch phase.

  8. JY1 time scale: a new Kalman-filter time scale designed at NIST

    International Nuclear Information System (INIS)

    Yao, Jian; Parker, Thomas E; Levine, Judah

    2017-01-01

    We report on a new Kalman-filter hydrogen-maser time scale (i.e. JY1 time scale) designed at the National Institute of Standards and Technology (NIST). The JY1 time scale is composed of a few hydrogen masers and a commercial Cs clock. The Cs clock is used as a reference clock to ease operations with existing data. Unlike other time scales, the JY1 time scale uses three basic time-scale equations, instead of only one equation. Also, this time scale can detect a clock error (i.e. time error, frequency error, or frequency drift error) automatically. These features make the JY1 time scale stiff and less likely to be affected by an abnormal clock. Tests show that the JY1 time scale deviates from the UTC by less than  ±5 ns for ∼100 d, when the time scale is initially aligned to the UTC and then is completely free running. Once the time scale is steered to a Cs fountain, it can maintain the time with little error even if the Cs fountain stops working for tens of days. This can be helpful when we do not have a continuously operated fountain or when the continuously operated fountain accidentally stops, or when optical clocks run occasionally. (paper)

  9. Metrological assurance and traceability for Industry 4.0 and additive manufacturing in Ukraine

    Science.gov (United States)

    Skliarov, Volodymyr; Neyezhmakov, Pavel; Prokopov, Alexander

    2018-03-01

    The national measurement standards from the point of view of traceability of the results of measurement in additive manufacturing in Ukraine are considered in the paper. The metrological characteristics of the national primary measurement standards in the field of geometric, temperature, optical-physical and time-frequency measurements, which took part in international comparisons within COOMET projects, are presented. The accurate geometric, temperature, optical-physical and time-frequency measurements are the key ones in controlling the quality of additive manufacturing. The use of advanced CAD/CAE/CAM systems allows to simulate the process of additive manufacturing at each stage. In accordance with the areas of the technology of additive manufacturing, the ways of improving the national measurement standards of Ukraine for the growing needs of metrology of additive manufacturing are considered.

  10. Theory-based metrological traceability in education: A reading measurement network.

    Science.gov (United States)

    Fisher, William P; Stenner, A Jackson

    2016-10-01

    Huge resources are invested in metrology and standards in the natural sciences, engineering, and across a wide range of commercial technologies. Significant positive returns of human, social, environmental, and economic value on these investments have been sustained for decades. Proven methods for calibrating test and survey instruments in linear units are readily available, as are data- and theory-based methods for equating those instruments to a shared unit. Using these methods, metrological traceability is obtained in a variety of commercially available elementary and secondary English and Spanish language reading education programs in the U.S., Canada, Mexico, and Australia. Given established historical patterns, widespread routine reproduction of predicted text-based and instructional effects expressed in a common language and shared frame of reference may lead to significant developments in theory and practice. Opportunities for systematic implementations of teacher-driven lean thinking and continuous quality improvement methods may be of particular interest and value.

  11. SU-F-I-13: Correction Factor Computations for the NIST Ritz Free Air Chamber for Medium-Energy X Rays

    International Nuclear Information System (INIS)

    Bergstrom, P

    2016-01-01

    Purpose: The National Institute of Standards and Technology (NIST) uses 3 free-air chambers to establish primary standards for radiation dosimetry at x-ray energies. For medium-energy × rays, the Ritz free-air chamber is the main measurement device. In order to convert the charge or current collected by the chamber to the radiation quantities air kerma or air kerma rate, a number of correction factors specific to the chamber must be applied. Methods: We used the Monte Carlo codes EGSnrc and PENELOPE. Results: Among these correction factors are the diaphragm correction (which accounts for interactions of photons from the x-ray source in the beam-defining diaphragm of the chamber), the scatter correction (which accounts for the effects of photons scattered out of the primary beam), the electron-loss correction (which accounts for electrons that only partially expend their energy in the collection region), the fluorescence correction (which accounts for ionization due to reabsorption ffluorescence photons and the bremsstrahlung correction (which accounts for the reabsorption of bremsstrahlung photons). We have computed monoenergetic corrections for the NIST Ritz chamber for the 1 cm, 3 cm and 7 cm collection plates. Conclusion: We find good agreement with other’s results for the 7 cm plate. The data used to obtain these correction factors will be used to establish air kerma and it’s uncertainty in the standard NIST x-ray beams.

  12. SU-F-I-13: Correction Factor Computations for the NIST Ritz Free Air Chamber for Medium-Energy X Rays

    Energy Technology Data Exchange (ETDEWEB)

    Bergstrom, P [National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899 (United States)

    2016-06-15

    Purpose: The National Institute of Standards and Technology (NIST) uses 3 free-air chambers to establish primary standards for radiation dosimetry at x-ray energies. For medium-energy × rays, the Ritz free-air chamber is the main measurement device. In order to convert the charge or current collected by the chamber to the radiation quantities air kerma or air kerma rate, a number of correction factors specific to the chamber must be applied. Methods: We used the Monte Carlo codes EGSnrc and PENELOPE. Results: Among these correction factors are the diaphragm correction (which accounts for interactions of photons from the x-ray source in the beam-defining diaphragm of the chamber), the scatter correction (which accounts for the effects of photons scattered out of the primary beam), the electron-loss correction (which accounts for electrons that only partially expend their energy in the collection region), the fluorescence correction (which accounts for ionization due to reabsorption ffluorescence photons and the bremsstrahlung correction (which accounts for the reabsorption of bremsstrahlung photons). We have computed monoenergetic corrections for the NIST Ritz chamber for the 1 cm, 3 cm and 7 cm collection plates. Conclusion: We find good agreement with other’s results for the 7 cm plate. The data used to obtain these correction factors will be used to establish air kerma and it’s uncertainty in the standard NIST x-ray beams.

  13. Development of Halal Pharmaceuticals Traceability Systems for Used with Mobile Devices

    International Nuclear Information System (INIS)

    Abd Jalil Abd Hamid

    2014-01-01

    From early times, the pharmaceutical industry has had simple traceability systems, but with the increasing implementation of quality management in pharmaceutical manufacture, traceability systems have become more advanced covering more information and more steps in the production chain. Pork and its byproducts are not considered permissible (non-halal) and are forbidden for muslims to consume, along with alcohol and meat from animals not slaughtered according to Islamic law. Recently, the porcine DNA crisis and debates about non-halal substances have drawn new attention to production chain traceability. Existing guidelines on halal products, especially those issued by Jakim, and the halal standard MS2424, were insufficient to overcome the heaping problems of non-halal pharmaceuticals. An effective traceability system is essential to mitigate the risks associated with non-halal pharmaceutical and also as a tool for communication making information available along the production and supply chain. Traceability in pharmaceutical manufacturing can range from in-house traceability in production plants to traceability in whole or part of the production chain from raw material to consumer, and descriptors of the product and its history can be few or many as decided. This study is written to discuss on the approaches towards development of halal pharmaceuticals traceability systems for used with mobile devices for fulfilling muslims consumer demands. Specifically, this study discusses the conceptual architecture on halal traceability system for halal pharmaceutical product in Malaysia. (author)

  14. Phenolic Profiling for Traceability of Vanilla ×tahitensis

    Directory of Open Access Journals (Sweden)

    Matteo Busconi

    2017-10-01

    Full Text Available Vanilla is a flavoring recovered from the cured beans of the orchid genus Vanilla. Vanilla ×tahitensis is traditionally cultivated on the islands of French Polynesia, where vanilla vines were first introduced during the nineteenth century and, since the 1960s, have been introduced to other Pacific countries such as Papua New Guinea (PNG, cultivated and sold as “Tahitian vanilla,” although both sensory properties and aspect are different. From an economic point of view, it is important to ensure V. ×tahitensis traceability and to guarantee that the marketed product is part of the future protected designation of the origin “Tahitian vanilla” (PDO, currently in progress in French Polynesia. The application of metabolomics, allowing the detection and simultaneous analysis of hundreds or thousands of metabolites from different matrices, has recently gained high interest in food traceability. Here, metabolomics analysis of phenolic compounds profiles was successfully applied for the first time to V. ×tahitensis to deepen our knowledge of vanilla metabolome, focusing on phenolics compounds, for traceability purposes. Phenolics were screened through a quadrupole-time-of-flight mass spectrometer coupled to a UHPLC liquid chromatography system, and 260 different compounds were clearly evidenced and subjected to different statistical analysis in order to enable the discrimination of the samples based on their origin. Eighty-eight and twenty three compounds, with a prevalence of flavonoids, resulted to be highly discriminant through ANOVA and Orthogonal Projections to Latent Structures Discriminant Analysis (OPLS-DA respectively. Volcano plot analysis and pairwise comparisons were carried out to determine those compounds, mainly responsible for the differences among samples as a consequence of either origin or cultivar. The samples from PNG were clearly different from the Tahitian samples that were further divided in two different groups based on

  15. Phenolic Profiling for Traceability of Vanilla ×tahitensis.

    Science.gov (United States)

    Busconi, Matteo; Lucini, Luigi; Soffritti, Giovanna; Bernardi, Jamila; Bernardo, Letizia; Brunschwig, Christel; Lepers-Andrzejewski, Sandra; Raharivelomanana, Phila; Fernandez, Jose A

    2017-01-01

    Vanilla is a flavoring recovered from the cured beans of the orchid genus Vanilla . Vanilla × tahitensis is traditionally cultivated on the islands of French Polynesia, where vanilla vines were first introduced during the nineteenth century and, since the 1960s, have been introduced to other Pacific countries such as Papua New Guinea (PNG), cultivated and sold as "Tahitian vanilla," although both sensory properties and aspect are different. From an economic point of view, it is important to ensure V . × tahitensis traceability and to guarantee that the marketed product is part of the future protected designation of the origin "Tahitian vanilla" (PDO), currently in progress in French Polynesia. The application of metabolomics, allowing the detection and simultaneous analysis of hundreds or thousands of metabolites from different matrices, has recently gained high interest in food traceability. Here, metabolomics analysis of phenolic compounds profiles was successfully applied for the first time to V . × tahitensis to deepen our knowledge of vanilla metabolome, focusing on phenolics compounds, for traceability purposes. Phenolics were screened through a quadrupole-time-of-flight mass spectrometer coupled to a UHPLC liquid chromatography system, and 260 different compounds were clearly evidenced and subjected to different statistical analysis in order to enable the discrimination of the samples based on their origin. Eighty-eight and twenty three compounds, with a prevalence of flavonoids, resulted to be highly discriminant through ANOVA and Orthogonal Projections to Latent Structures Discriminant Analysis (OPLS-DA) respectively. Volcano plot analysis and pairwise comparisons were carried out to determine those compounds, mainly responsible for the differences among samples as a consequence of either origin or cultivar. The samples from PNG were clearly different from the Tahitian samples that were further divided in two different groups based on the different

  16. Radionuclide metrology: traceability and response to a radiological accident

    Energy Technology Data Exchange (ETDEWEB)

    Tauhata, L.; Cruz, P.A.L. da; Silva, C.J. da; Delgado, J.U.; Oliveira, A.E. de; Oliveira, E.M. de; Poledna, R.; Loureiro, J. dos S.; Ferreira Filho, A.L.; Silva, R.L. da; Filho, O. L.T.; Santos, A.R.L. dos; Veras, E.V. de; Rangel, J. de A.; Quadros, A.L.L.; Araújo, M.T.F. de; Souza, P.S. de; Ruzzarim, A.; Conceição, D.A. da; Iwahara, A., E-mail: palcruz@ird.gov.br [Instituto de Radioproteção e Dosimetria (LNMRI/IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. Nacional de Metrologia das Radiações Ionizantes

    2017-07-01

    In the case of a radiological accident, there are characteristic phases: discovery and initial assistance with first aid; the triage and monitoring of the affected population; the release of the affected people; forward the victims to medical care; as well as the preparation of the report on the accident. In addition, studies and associated researches performed in the later period. Monitors, dosimeters and measuring systems should be calibrated by contaminating radionuclide standards. The radioactive sources used must be metrologically reliable. In Brazil, this function is performed by LNMRI/IRD/CNEN, designated by INMETRO, which Radionuclide Metrology Laboratory is responsible for the standardization and supply of radioactive sources in diverse geometries and matrices. This laboratory has a stock of radionuclide solutions with controlled environmental variables for the preparation of sources, which are calibrated and standardized by mean of primary and secondary systems. It is also responsible for the dissemination of standards and, in order to establish the metrological traceability of national standards, participates in international key-comparisons promoted by BIPM and regional metrology organizations. Internally, it promotes the National Comparison Programs for laboratories for the analysis of environmental samples and the traceability for producing centers of radiopharmaceuticals and Nuclear Medicine Services in the country. The paper presents the demand for {sup 137}Cs related to the radioactive accident in Goiania/Brazil and the significant results for the main radionuclides standardized by the Radionuclide Metrology Laboratory for international key-comparisons and national comparisons to provide metrological traceability. With the obtained results, the LNMRI of Brazil integrates the international metrology BIPM network and fulfills its function of supplying, with about a hundred of radioactive standards, the country's needs in different applications

  17. Radionuclide metrology: traceability and response to a radiological accident

    International Nuclear Information System (INIS)

    Tauhata, L.; Cruz, P.A.L. da; Silva, C.J. da; Delgado, J.U.; Oliveira, A.E. de; Oliveira, E.M. de; Poledna, R.; Loureiro, J. dos S.; Ferreira Filho, A.L.; Silva, R.L. da; Filho, O. L.T.; Santos, A.R.L. dos; Veras, E.V. de; Rangel, J. de A.; Quadros, A.L.L.; Araújo, M.T.F. de; Souza, P.S. de; Ruzzarim, A.; Conceição, D.A. da; Iwahara, A.

    2017-01-01

    In the case of a radiological accident, there are characteristic phases: discovery and initial assistance with first aid; the triage and monitoring of the affected population; the release of the affected people; forward the victims to medical care; as well as the preparation of the report on the accident. In addition, studies and associated researches performed in the later period. Monitors, dosimeters and measuring systems should be calibrated by contaminating radionuclide standards. The radioactive sources used must be metrologically reliable. In Brazil, this function is performed by LNMRI/IRD/CNEN, designated by INMETRO, which Radionuclide Metrology Laboratory is responsible for the standardization and supply of radioactive sources in diverse geometries and matrices. This laboratory has a stock of radionuclide solutions with controlled environmental variables for the preparation of sources, which are calibrated and standardized by mean of primary and secondary systems. It is also responsible for the dissemination of standards and, in order to establish the metrological traceability of national standards, participates in international key-comparisons promoted by BIPM and regional metrology organizations. Internally, it promotes the National Comparison Programs for laboratories for the analysis of environmental samples and the traceability for producing centers of radiopharmaceuticals and Nuclear Medicine Services in the country. The paper presents the demand for 137 Cs related to the radioactive accident in Goiania/Brazil and the significant results for the main radionuclides standardized by the Radionuclide Metrology Laboratory for international key-comparisons and national comparisons to provide metrological traceability. With the obtained results, the LNMRI of Brazil integrates the international metrology BIPM network and fulfills its function of supplying, with about a hundred of radioactive standards, the country's needs in different applications

  18. Unexplored Indoors method for pyranometers calibration traceable to SI

    International Nuclear Information System (INIS)

    Castillo-Matadamas, H A; Molina-Vazquez, J C; Quintero-Torres, R

    2015-01-01

    A method to calibrate pyranometers with direct traceability to the International System of Units (SI) is presented, the method use an electrically calibrated pyroelectric detector (ECPR) as standard and offers numerous advantages over outdoors conventional calibration methods, such as reducing the uncertainty from the reference standard and the final uncertainty of the sensitivity coefficient of the calibrated pyranometer; the measurement uncertainty achieved with this method at normal irradiance is 2.1% for a coverage factor k = 2 and could be reduce if one reduces the uncertainty level of the reference standard

  19. A mixing method for traceable air velocity measurements

    International Nuclear Information System (INIS)

    Sillanpää, S; Heinonen, M

    2008-01-01

    A novel and quite simple method to establish a traceability link between air velocity and the national standards of mass and time is presented in this paper. The method is based on the humidification of flowing air before the blower of a wind tunnel with a known mass flow of water. Then air velocity can be calculated as a function of humidification water flow. The method is compared against a Pitot-tube-based velocity measurement in a wind tunnel at the MIKES. The results of these two different methods agreed well, with a maximum difference of 0.7%

  20. Traceability of Plant Diet Contents in Raw Cow Milk Samples

    Science.gov (United States)

    Ponzoni, Elena; Mastromauro, Francesco; Gianì, Silvia; Breviario, Diego

    2009-01-01

    The use of molecular marker in the dairy sector is gaining large acceptance as a reliable diagnostic approach for food authenticity and traceability. Using a PCR approach, the rbcL marker, a chloroplast-based gene, was selected to amplify plant DNA fragments in raw cow milk samples collected from stock farms or bought on the Italian market. rbcL-specific DNA fragments could be found in total milk, as well as in the skimmed and the cream fractions. When the PCR amplified fragments were sent to sequence, the nucleotide composition of the chromatogram reflected the multiple contents of the polyphytic diet. PMID:22253982

  1. Portable radiation instrumentation traceability of standards and measurements

    International Nuclear Information System (INIS)

    Wiserman, A.; Walke, M.

    1995-01-01

    Portable radiation measuring instruments are used to estimate and control doses for workers. Calibration of these instruments must be sufficiently accurate to ensure that administrative and legal dose limits are not likely to be exceeded due to measurement uncertainties. An instrument calibration and management program is established which permits measurements made with an instrument to be traced to a national standard. This paper describes the establishment and maintenance of calibration standards for gamma survey instruments and an instrument management program which achieves traceability of measurement for uniquely identified field instruments. (author)

  2. A Middleware Architecture for RFID-enabled traceability of air baggage

    Directory of Open Access Journals (Sweden)

    Bouhouche T.

    2017-01-01

    Full Text Available 1980 marked the start of a boom in radiofrequency identification (RFID technology, initially associated with a growing need for traceability. In view of the technological progress and lower costs, RFID’s area of application became much broader and, today, multiple business sectors take advantage of this technology. However, in order to achieve the maximum benefits of RFID technology, the data collected should be delivered in the best conditions to the whole applications that have need of its exploitation. For that, a dedicated middleware solution is required to ensure the collection of RFID data and their integration in information systems. The issues and key points of this integration as the description of the RFID technology will be summarized in the present paper, with a new middleware architecture. We focus mainly on components and the design of our middleware MedRFID, solution developed in our Lab, and which integrates mobility and provides extensibility, scalability, abstraction, ease of deployment and compatibility with IATA standards and EPCglobal standards. Moreover, we have developed an application (FindLuggage allowing a real time tracking of luggage in the airport, based on the proposed middleware MedRFID.

  3. High accuracy determination of trace elements in NIST standard reference materials by isotope dilution ICP-MS

    International Nuclear Information System (INIS)

    Paulsen, P.J.; Beary, E.S.

    1996-01-01

    At NIST (National Institute of Standards and Technology), ICP-MS ID (inductively coupled mass spectrometry isotope dilution) has been used to certify a wide range of elements in a variety of materials with high accuracy. Both the chemical preparation and instrumental procedures are simpler than with other ID mass spectrometric techniques. The ICP-MS has picogram/ml detection limits for most elements using fixed operating parameters. Chemical separations are required only to remove an interference (from molecular ions as well as isobaric atoms), or to pre-concentrate the analyte. For example, chemical separations were required for the analysis of SRM 2711, Montana II Soil, but not for boron in peach leaves, SRM 1547.(3 refs., 3 tabs., 2 figs

  4. Aplicación del NFIS (Nist Fingerprint Image Software para la Extracción de Características de Huellas Dactilares Aplicación del NFIS (Nist Fingerprint Image Software para la Extracción de Características de Huellas Dactilares

    Directory of Open Access Journals (Sweden)

    Noé Mosqueda Valadez

    2012-02-01

    Full Text Available Este artículo presenta una descripción acerca de las huellas dactilares y sus características, así como la extracción de puntos característicos de la misma por medio del programa NFIS desarrollado por el NIST (National Institute of Standards and Technology en conjunción con el FBI (Federal Bureau of Investigation, descripción de algunas herramientas, así como un panorama general de un sistema AFAS (Automatic Fingerprint Authentification System y de un sistema AFIS (Automatic Fingerprint Identification System. This paper presents a description about the fingerprints and its characteristics, as well as the extraction of their characteristic points by means of the application of the program NFIS (NIST Fingerprint Image Software developed by the NIST (National Institute of Standards and Technology in conjunction with the FBI (Federal Bureau of Investigation, the description of some tools, as well as a general view of a system AFAS (Automatic Fingerprint Authentification System and of a system AFIS (Automatic Fingerprint Identification System.

  5. Traceability and retrievability: Documentation, the bridge from science to compliance

    International Nuclear Information System (INIS)

    Warner, P.J.

    1997-01-01

    In this day of regulatory compliance, the fact that good science was practiced and documented is, in and of itself, not enough to assure a successful licensing or permitting result. A new level of documentation, that clearly walks a non-project reviewer through the traceability of all activities and decisions is required for successful acceptance of scientific results. Compliance reviewers (whether the Nuclear Regulatory Commission (NRC), Environmental Protection Agency (EPA), etc.) expect to verify the results of the scientific and program activities without the physical presence of the person or persons that conducted the activity. Traceability of activities and associated decisions through the retrieval of all associated records is a must. This presentation is based on lessons learned from the various quality assurance (QA) audits and program reviews of Sandia National Laboratories, Nuclear Waste Management Programs Center, scientific and programmatic documentation. The authors build a bridge from science to compliance from lessons learned. Here now is a somewhat fictional rendition of actual scientific testing and compliance support activities

  6. Processing Uncertain RFID Data in Traceability Supply Chains

    Directory of Open Access Journals (Sweden)

    Dong Xie

    2014-01-01

    Full Text Available Radio Frequency Identification (RFID is widely used to track and trace objects in traceability supply chains. However, massive uncertain data produced by RFID readers are not effective and efficient to be used in RFID application systems. Following the analysis of key features of RFID objects, this paper proposes a new framework for effectively and efficiently processing uncertain RFID data, and supporting a variety of queries for tracking and tracing RFID objects. We adjust different smoothing windows according to different rates of uncertain data, employ different strategies to process uncertain readings, and distinguish ghost, missing, and incomplete data according to their apparent positions. We propose a comprehensive data model which is suitable for different application scenarios. In addition, a path coding scheme is proposed to significantly compress massive data by aggregating the path sequence, the position, and the time intervals. The scheme is suitable for cyclic or long paths. Moreover, we further propose a processing algorithm for group and independent objects. Experimental evaluations show that our approach is effective and efficient in terms of the compression and traceability queries.

  7. Processing uncertain RFID data in traceability supply chains.

    Science.gov (United States)

    Xie, Dong; Xiao, Jie; Guo, Guangjun; Jiang, Tong

    2014-01-01

    Radio Frequency Identification (RFID) is widely used to track and trace objects in traceability supply chains. However, massive uncertain data produced by RFID readers are not effective and efficient to be used in RFID application systems. Following the analysis of key features of RFID objects, this paper proposes a new framework for effectively and efficiently processing uncertain RFID data, and supporting a variety of queries for tracking and tracing RFID objects. We adjust different smoothing windows according to different rates of uncertain data, employ different strategies to process uncertain readings, and distinguish ghost, missing, and incomplete data according to their apparent positions. We propose a comprehensive data model which is suitable for different application scenarios. In addition, a path coding scheme is proposed to significantly compress massive data by aggregating the path sequence, the position, and the time intervals. The scheme is suitable for cyclic or long paths. Moreover, we further propose a processing algorithm for group and independent objects. Experimental evaluations show that our approach is effective and efficient in terms of the compression and traceability queries.

  8. Application of Stable Isotope Signatures in Food Traceability

    International Nuclear Information System (INIS)

    Nazaratul Ashifa Abdullah Salim; Roslanzairi Mostapha; Zainon Othman

    2016-01-01

    Stable isotope analysis has widely been used to trace the origin of organic materials in various fields, such as geochemistry, biochemistry, archaeology and petroleum. In past a decade, it has also become an important tool for food traceability study. The globalisation of food markets and the relative ease which food commodities are transported through and between countries and continents means that consumers are increasingly concerned about the origin of the foods they eat. The natural abundance of stable isotope variation such as carbon, nitrogen, hydrogen and oxygen are used as geographic tracers or marker to determine the geographic origin of fruits, crop, vegetables and food products from animal. The isotopic compositions of plant materials reflect various factors such as isotopic compositions of source materials and their assimilation processes as well as growth environments. This paper will discuss on stable carbon and nitrogen isotopic compositions in rice that been determined by Isotope Ratio Mass Spectrometry, advantages, limitations and potential of other analysis applications that can be incorporated in food traceability system. (author)

  9. Metrological traceability of carbon dioxide measurements in atmosphere and seawater

    International Nuclear Information System (INIS)

    Rolle, F; Pessana, E; Sega, M

    2017-01-01

    The accurate determination of gaseous pollutants is fundamental for the monitoring of the trends of these analytes in the environment and the application of the metrological concepts to this field is necessary to assure the reliability of the measurement results. In this work, an overview of the activity carried out at Istituto Nazionale di Ricerca Metrologica to establish the metrological traceability of the measurements of gaseous atmospheric pollutants, in particular of carbon dioxide (CO 2 ), is presented. Two primary methods, the gravimetry and the dynamic dilution, are used for the preparation of reference standards for composition which can be used to calibrate sensors and analytical instrumentation. At present, research is carried out to lower the measurement uncertainties of the primary gas mixtures and to extend their application to the oceanic field. The reason of such investigation is due to the evidence of the changes occurring in seawater carbonate chemistry, connected to the rising level of CO 2 in the atmosphere. The well established activity to assure the metrological traceability of CO 2 in the atmosphere will be applied to the determination of CO 2 in seawater, by developing suitable reference materials for calibration and control of the sensors during their routine use. (paper)

  10. Tailoring NIST Security Controls for the Ground System: Selection and Implementation -- Recommendations for Information System Owners

    Science.gov (United States)

    Takamura, Eduardo; Mangum, Kevin

    2016-01-01

    . Certain protective measures for the general enterprise may not be as efficient within the ground segment. This is what the authors have concluded through observations and analysis of patterns identified from the various security assessments performed on NASA missions such as MAVEN, OSIRIS-REx, New Horizons and TESS, to name a few. The security audits confirmed that the framework for managing information system security developed by the National Institute of Standards and Technology (NIST) for the federal government, and adopted by NASA, is indeed effective. However, the selection of the technical, operational and management security controls offered by the NIST model - and how they are implemented - does not always fit the nature and the environment where the ground system operates in even though there is no apparent impact on mission success. The authors observed that unfit controls, that is, controls that are not necessarily applicable or sufficiently effective in protecting the mission systems, are often selected to facilitate compliance with security requirements and organizational expectations even if the selected controls offer minimum or non-existent protection. This paper identifies some of the standard security controls that can in fact protect the ground system, and which of them offer little or no benefit at all. It offers multiple scenarios from real security audits in which the controls are not effective without, of course, disclosing any sensitive information about the missions assessed. In addition to selection and implementation of controls, the paper also discusses potential impact of recent legislation such as the Federal Information Security Modernization Act (FISMA) of 2014 - aimed at the enterprise - on the ground system, and offers other recommendations to Information System Owners (ISOs).

  11. Guidance on meeting DOE order requirements for traceable nondestructive assay measurements

    International Nuclear Information System (INIS)

    1994-05-01

    Purpose of this guide is to facilitate accuracy and precision of nondestructive assay measurements through improvement of the materials and process of traceability. This document provides DOE and its contractor facilities with guidance to establish traceability to the national measurement base for site-prepared NDA working reference materials

  12. Developing a Framework for Traceability Implementation in the Textile Supply Chain

    Directory of Open Access Journals (Sweden)

    Vijay Kumar

    2017-04-01

    Full Text Available Traceability has recently gained considerable attention in the textile industry. Traceability stands for information sharing about a product including the product history, specification, or location. With the involvement of globally dispersed actors in the textile supply chain, ensuring appropriate product quality with timely supplies is crucial for surviving in this industry with ever increasing competition. Hence it is of paramount importance for a supply chain actor to track every product and trace its history in the supply chain. In this context, this paper presents a framework to implement traceability in the textile supply chain. A system approach has been followed, where firstly the usage requirement of traceability is defined, and then a framework for implementing intra-actor or internal traceability and inter-actor or external traceability is discussed. This article further presents a sequential diagram to demonstrate the interaction and information exchange between the actors in the supply chain, when the traceability information is requested. An example is also illustrated for data storage using a relational database management system and information exchange using XML for the textile weaver. Finally, the article discusses challenges and future studies required to implement traceability in the textile supply chain.

  13. Technical and economic considerations about traceability and certification in livestock production chains

    NARCIS (Netherlands)

    Meuwissen, M.P.M.; Velthuis, A.G.J.; Hogeveen, H.; Huirne, R.B.M.

    2003-01-01

    This paper focuses on traceability and certification. The goal of the paper is to analyse the status and perspectives of traceability systems and certification schemes and to review their potential costs and benefits. The following two sections describe purposes, requirements, status and

  14. The Expanding Role of Traceability in Seafood: Tools and Key Initiatives.

    Science.gov (United States)

    Lewis, Sara G; Boyle, Mariah

    2017-08-01

    In the last decade, a range of drivers within the seafood sector have incentivized the application of traceability to issues beyond food safety and inventory management. Some of the issues motivating the expanded use of traceability within the global seafood sector include: increased media attention on the legal and social risks within some seafood supply chains, governmental traceability requirements, private-sector sustainability commitments, and others. This article begins with an overview of these topics in the seafood industry, and why many nongovernment organizations (NGOs), companies, and government actors have turned to traceability as a tool to address them. We discuss how traceability connects to key requirements of environmental sustainability and social responsibility. Later, we review the range of traceability services, tools, software solutions, and the due diligence measures that are currently being leveraged within the seafood sector. The paper concludes with a discussion of several NGO- and industry-led traceability initiatives that are examples of seafood traceability improvements. © 2017 Institute of Food Technologists®.

  15. Diagnostic model for assessing traceability system performance in fish processing plants

    NARCIS (Netherlands)

    Mgonja, J.T.; Luning, P.A.; Vorst, van der J.G.A.J.

    2013-01-01

    This paper introduces a diagnostic tool that can be used by fish processing companies to evaluate their own traceability systems in a systematic manner. The paper begins with discussions on the rationale of traceability systems in food manufacturing companies, followed by a detailed analysis of the

  16. Accident Analysis for the NIST Research Reactor Before and After Fuel Conversion

    Energy Technology Data Exchange (ETDEWEB)

    Baek J.; Diamond D.; Cuadra, A.; Hanson, A.L.; Cheng, L-Y.; Brown, N.R.

    2012-09-30

    Postulated accidents have been analyzed for the 20 MW D2O-moderated research reactor (NBSR) at the National Institute of Standards and Technology (NIST). The analysis has been carried out for the present core, which contains high enriched uranium (HEU) fuel and for a proposed equilibrium core with low enriched uranium (LEU) fuel. The analyses employ state-of-the-art calculational methods. Three-dimensional Monte Carlo neutron transport calculations were performed with the MCNPX code to determine homogenized fuel compositions in the lower and upper halves of each fuel element and to determine the resulting neutronic properties of the core. The accident analysis employed a model of the primary loop with the RELAP5 code. The model includes the primary pumps, shutdown pumps outlet valves, heat exchanger, fuel elements, and flow channels for both the six inner and twenty-four outer fuel elements. Evaluations were performed for the following accidents: (1) control rod withdrawal startup accident, (2) maximum reactivity insertion accident, (3) loss-of-flow accident resulting from loss of electrical power with an assumption of failure of shutdown cooling pumps, (4) loss-of-flow accident resulting from a primary pump seizure, and (5) loss-of-flow accident resulting from inadvertent throttling of a flow control valve. In addition, natural circulation cooling at low power operation was analyzed. The analysis shows that the conversion will not lead to significant changes in the safety analysis and the calculated minimum critical heat flux ratio and maximum clad temperature assure that there is adequate margin to fuel failure.

  17. Testing improvements in the chocolate traceability system: Impact on product recalls and production efficiency

    DEFF Research Database (Denmark)

    Saltini, Rolando; Akkerman, Renzo

    2012-01-01

    hypothetical improvements of the traceability system within the chocolate production system and supply chain and we illustrate the resulting benefits by using a case study. Based on the case study, we quantify the influence of these improvements on production efficiency and recall size in case of a safety......The primary aim of food traceability is to increase food safety, but traceability systems can also bring other benefits to production systems and supply chains. In the literature these benefits are extensively discussed, but studies that quantify them are scarce. In this paper we propose two...... crisis by developing a simulation tool. These results are aimed to illustrate and quantify the additional benefits of traceability information, and could help food industries in deciding whether and how to improve their traceability systems....

  18. Blockchain protocols in clinical trials: Transparency and traceability of consent [version 3; referees: 1 approved, 2 approved with reservations, 1 not approved

    OpenAIRE

    Mehdi Benchoufi; Raphael Porcher; Philippe Ravaud

    2017-01-01

    Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing the collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we will built a consent workflow using a rising technology called Blockchain. This is a...

  19. Traceable components of terrestrial carbon storage capacity in biogeochemical models.

    Science.gov (United States)

    Xia, Jianyang; Luo, Yiqi; Wang, Ying-Ping; Hararuk, Oleksandra

    2013-07-01

    Biogeochemical models have been developed to account for more and more processes, making their complex structures difficult to be understood and evaluated. Here, we introduce a framework to decompose a complex land model into traceable components based on mutually independent properties of modeled biogeochemical processes. The framework traces modeled ecosystem carbon storage capacity (Xss ) to (i) a product of net primary productivity (NPP) and ecosystem residence time (τE ). The latter τE can be further traced to (ii) baseline carbon residence times (τ'E ), which are usually preset in a model according to vegetation characteristics and soil types, (iii) environmental scalars (ξ), including temperature and water scalars, and (iv) environmental forcings. We applied the framework to the Australian Community Atmosphere Biosphere Land Exchange (CABLE) model to help understand differences in modeled carbon processes among biomes and as influenced by nitrogen processes. With the climate forcings of 1990, modeled evergreen broadleaf forest had the highest NPP among the nine biomes and moderate residence times, leading to a relatively high carbon storage capacity (31.5 kg cm(-2) ). Deciduous needle leaf forest had the longest residence time (163.3 years) and low NPP, leading to moderate carbon storage (18.3 kg cm(-2) ). The longest τE in deciduous needle leaf forest was ascribed to its longest τ'E (43.6 years) and small ξ (0.14 on litter/soil carbon decay rates). Incorporation of nitrogen processes into the CABLE model decreased Xss in all biomes via reduced NPP (e.g., -12.1% in shrub land) or decreased τE or both. The decreases in τE resulted from nitrogen-induced changes in τ'E (e.g., -26.7% in C3 grassland) through carbon allocation among plant pools and transfers from plant to litter and soil pools. Our framework can be used to facilitate data model comparisons and model intercomparisons via tracking a few traceable components for all terrestrial carbon

  20. Exploring a Black Body Source as an Absolute Radiometric Calibration Standard and Comparison with a NIST Traced Lamp Standard

    Science.gov (United States)

    Green, Robert O.; Chrien, Thomas; Sarture, Chuck

    2001-01-01

    Radiometric calibration of the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) is required for the scientific research and application objectives pursued with the spectroscopic measurements. Specifically calibration is required for: inter-comparison of AVIRIS data measured at different locations and at different times; analysis of AVIRIS data with data measured by other instruments; and analysis of AVIRIS data in conjunction with computer models. The primary effect of radiometric calibration is conversion of AVIRIS instrument response values (digitized numbers, or DN) to units of absolute radiance. For example, a figure shows the instrument response spectrum measured by AVIRIS over a portion of Rogers Dry Lake, California, and another figure shows the same spectrum calibrated to radiance. Only the calibrated spectrum may be quantitatively analyzed for science research and application objectives. Since the initial development of the AVIRIS instrument-radiometric calibration has been based upon a 1000-W irradiance lamp with a calibration traced to the National Institute of Standards and Technology (NIST). There are several advantages to this irradiance-lamp calibration approach. First, the considerable effort of NIST backs up the calibration. Second, by changing the distance to the lamp, the output can closely span the radiance levels measured by AVIRIS. Third, this type of standard is widely used. Fourth, these calibrated lamps are comparatively inexpensive. Conversely, there are several disadvantages to this approach as well. First, the lamp is not a primary standard. Second, the lamp output characteristics may change in an unknown manner through time. Third, it is difficult to assess, constrain, or improve the calibration uncertainty delivered with the lamp. In an attempt to explore the effect and potentially address some of these disadvantages a set of analyses and measurements comparing an irradiance lamp with a black-body source have been completed

  1. 76 FR 66040 - NIST Framework and Roadmap for Smart Grid Interoperability Standards, Release 2.0 (Draft...

    Science.gov (United States)

    2011-10-25

    ...-01] NIST Framework and Roadmap for Smart Grid Interoperability Standards, Release 2.0 (Draft... draft version of the NIST Framework and Roadmap for Smart Grid Interoperability Standards, Release 2.0... Roadmap for Smart Grid Interoperability Standards, Release 2.0 (Release 2.0) (Draft) for public review and...

  2. Traceable measurements of the activity concentration in air

    CERN Document Server

    Paul, A; Forkel-Wirth, Doris; Müller, A; Marcos, A

    2002-01-01

    The nuclear reactions induced by high energetic protons in heavy targets such as UC/sub 2/ and ThC cause a particular, complex radiation protection task at facilities like ISOLDE: the measurement of a mixture of different isotopes of the radioactive noble gas radon and the radon progenies in air. The knowledge of their respective activity concentration is fundamental for exposure assessments. Due to the complex mixture of activity concentrations in air, its precise determination is quite difficult. Therefore, a new procedure for taking reference samples was developed and implemented for the traceable measurement of the activity concentration of radioactive ions (e.g., radon progenies) in air. This technique is combined by measuring alpha -particles with a multi-wire ionization chamber for the parallel on-line determination of the activity concentration of different radon isotopes. (10 refs).

  3. The Researches on Food Traceability System of University takeout

    Science.gov (United States)

    lu, Jia xin; zhao, Ce; li, Zhuang zhuang; shao, Zi rong; pi, Kun yi

    2018-06-01

    In recent years, campus takeaway has developed rapidly, and all kinds of online ordering platforms are running. The problem of distribution in the campus can not only save the time cost of the businessmen, but also guarantee the effective management of the school, which is beneficial to the construction of the standard health system for the takeout. But distribution according to the existing mode will cause certain safety and health risks. The establishment of the University takeaway food traceability system can solve this problem. This paper first analyzes the sharing mode and distribution process of campus takeaway, and then designs the intelligent tracing system for the campus takeaway; the construction of the food distribution information platform and the problem of the recycling of the green environment of the dining box. Finally, the intelligent tracing system of the school takeout is analyzed with the braised chicken as an example.

  4. Traceable calibration of hospital 192Ir HDR sources

    International Nuclear Information System (INIS)

    Govinda Rajan, K.N.; Sharma, S.D.; Palaniselvam, T.; Vandana, S.; Bhatt, B.C.; Vinatha, S.; Patki, V.S.; Pendse, A.M.; Kannan, V.

    2004-01-01

    A HDR 1000 PLUS well type ionization chamber, procured from Standard Imaging, USA, and maintained by medical Physics and Safety Section (MPSS), Bhabha Atomic Research Centre (BARC), India, as a reference well chamber 1 (RWCH1), was traceably calibrated against the primary standard established by Radiological Standards Laboratory (RSL), BARC for 192 Ir HDR source, in terms of air kerma strength (AKS). An indigenously developed well-type ionization chamber, reference well chamber 2 (RWCH2) and electrometer system, fabricated by CD High Tech (CDHT) Instruments Private Ltd., Bangalore, India, was in turn calibrated against RWCH1. The CDHT system (i.e. RWCH2 and CDHT electrometer system) was taken to several hospitals, in different regions of the country, to check the calibration status of 192 Ir HDR sources. The result of this calibration audit work is reported here. (author)

  5. Towards Provenance and Traceability in CRISTAL for HEP

    CERN Document Server

    Shamdasani, Jetendr; McClatchey, Richard

    2014-01-01

    This paper discusses the CRISTAL object lifecycle management system and its use in provenance data management and the traceability of system events. This software was initially used to capture the construction and calibration of the CMS ECAL detector at CERN for later use by physicists in their data analysis. Some further uses of CRISTAL in different projects (CMS, neuGRID and N4U) are presented as examples of its flexible data model. From these examples, applications are drawn for the High Energy Physics domain and some initial ideas for its use in data preservation HEP are outlined in detail in this paper. Currently investigations are underway to gauge the feasibility of using the N4U Analysis Service or a derivative of it to address the requirements of data and analysis logging and provenance capture within the HEP long term data analysis environment.

  6. Ethical Traceability for Improved Transparency in the Food Chain

    DEFF Research Database (Denmark)

    Coff, Christian Eyde

    2010-01-01

    Some practices in the agri-food sector worry consumers. Consumers might for instance be concerned about animal welfare, health, environmental issues, transparency of the food chain and so forth.A question, which confronts consumers today, is how they can become capable of acting upon such ethical...... concerns. Information is often seen as an answer to the mentioned consumer concerns. Paradoxically, although consumers are bombarded with information on food - from the media, the food industry, food authorities, NGOs and interest groups – details about how foods are actually produced is often hard to find....... Much of the information available is superficial, conflicting or partial, and it is hard for consumers seeking to make informed food choices on ethical matters to know which information to trust. Food traceability, which provides a record of the history and journey of a given food, and which...

  7. Metrology of trace radionuclides in environment. Standardization and traceability

    International Nuclear Information System (INIS)

    Calmet, D.

    1999-01-01

    Widespread concern over radioactive substances in the environment regularly requires environmental and public health assessments. The credibility of an assessment will depend on the quality and reliability on measurement results that often are of paramount significance in the environmental domain. Those man made radionuclides present in the various environmental components of the French territory are however found at trace, even ultra-trace levels. This article gives an overview of standardization work and required reference materials and rules for measuring radionuclides in environmental matrices as well as the international and national systems to manage standardization and traceability. Some achievements as well as the many difficulties that the metrologist must overcome when using nuclear techniques to measure trace quantities of radionuclides are presented. (author)

  8. The Researches on Food Traceability System of University takeout

    Directory of Open Access Journals (Sweden)

    lu Jia xin

    2018-01-01

    Full Text Available In recent years, campus takeaway has developed rapidly, and all kinds of online ordering platforms are running. The problem of distribution in the campus can not only save the time cost of the businessmen, but also guarantee the effective management of the school, which is beneficial to the construction of the standard health system for the takeout. But distribution according to the existing mode will cause certain safety and health risks. The establishment of the University takeaway food traceability system can solve this problem. This paper first analyzes the sharing mode and distribution process of campus takeaway, and then designs the intelligent tracing system for the campus takeaway; the construction of the food distribution information platform and the problem of the recycling of the green environment of the dining box. Finally, the intelligent tracing system of the school takeout is analyzed with the braised chicken as an example.

  9. Traceable measurements of the activity concentration in air

    International Nuclear Information System (INIS)

    Paul, Annette; Honig, Anja; Forkel-Wirth, Doris; Mueller, Andre; Marcos, Alicia

    2002-01-01

    The nuclear reactions induced by high energetic protons in heavy targets such as UC 2 and ThC cause a particular, complex radiation protection task at facilities like ISOLDE: the measurement of a mixture of different isotopes of the radioactive noble gas radon and the radon progenies in air. The knowledge of their respective activity concentration is fundamental for exposure assessments. Due to the complex mixture of activity concentrations in air, its precise determination is quite difficult. Therefore, a new procedure for taking reference samples was developed and implemented for the traceable measurement of the activity concentration of radioactive ions (e.g., radon progenies) in air. This technique is combined by measuring α-particles with a multi-wire ionization chamber for the parallel on-line determination of the activity concentration of different radon isotopes

  10. Improving iodine homogeneity in NIST SRM 1548a Typical Diet by cryogenic grinding

    Czech Academy of Sciences Publication Activity Database

    Kučera, Jan; Kameník, Jan

    2015-01-01

    Roč. 20, č. 3 (2015), s. 189-194 ISSN 0949-1775 R&D Projects: GA ČR(CZ) GBP108/12/G108; GA MŠk LM2011019 Institutional support: RVO:61389005 Keywords : Iodine * reference material * NIST SRM 1548a * cryogenic grinding * homogeneity Subject RIV: CB - Analytical Chemistry, Separation Impact factor: 1.010, year: 2015

  11. Calculation of radioactivity of β-nuclides by CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Shu Fujun; Zhang Shengdong; Ding Youqian; Sun Hongqing; Tang Peijia

    2010-01-01

    CIEMAT/NIST method for calculating radioactivity of β-nuclides was introduced in this paper. The influences of KB value and quenching parameter on the radioactivity computation of 241 Pu, 106 Ru/ 106 Rh, 63 Ni, 151 Sm and 14 C were studied by CIEMAT/NIST method with 3 H tracing. It is shown that the effect of KB value can be ignored if it varies in a proper range; Except for 106 Ru/ 106 Rh, the discrepancy between prediction and actual activity is lower than 2% in low quenching extent. However, it increases with quenching extent, and the largest discrepancy soars to nearly 13%. In addition, the reason for bad agreement of 106 Ru/ 106 Rh between prediction and actual activity was discussed. Efficiency calibration curves of 79 Se, 93 Zr and 107 Pd were also computed by CIEMAT/NIST method, compared with approximate replacement method or fitting and interpolation method. It is shown that CIEMAT/NIST method is no more accurate and suitable than the other two techniques. (authors)

  12. Eulerian–Lagrangian RANS Model Simulations of the NIST Turbulent Methanol Spray Flame

    NARCIS (Netherlands)

    Zhu, Shanglong; Roekaerts, Dirk; Pozarlik, Artur Krzysztof; van der Meer, Theodorus H.

    2015-01-01

    A methanol spray flame in a combustion chamber of the NIST was simulated using an Eulerian–Lagrangian RANS model. Experimental data and previous numerical investigations by other researchers on this flame were analyzed to develop methods for more comprehensive model validation. The inlet boundary

  13. DELAMINATION AND XRF ANALYSIS OF NIST LEAD IN PAINT FILM STANDARDS

    Science.gov (United States)

    The objectives of this protocol were to remove the laminate coating from lead paint film standards acquired from NIST by means of surface heating. The average XRF value did not change after removal of the polymer coating suggesting that this protocol is satisfactory for renderin...

  14. Analysis of the NIST database towards the composition of vulnerabilities in attack scenarios

    NARCIS (Netherlands)

    Nunes Leal Franqueira, V.; van Keulen, Maurice

    The composition of vulnerabilities in attack scenarios has been traditionally performed based on detailed pre- and post-conditions. Although very precise, this approach is dependent on human analysis, is time consuming, and not at all scalable. We investigate the NIST National Vulnerability Database

  15. The (TNO) Speaker Diarization System for NIST Rich Transcription Evaluation 2005 for meeting data

    NARCIS (Netherlands)

    Leeuwen, D.A. van

    2005-01-01

    Abstract. The TNO speaker speaker diarization system is based on a standard BIC segmentation and clustering algorithm. Since for the NIST Rich Transcription speaker dizarization evaluation measure correct speech detection appears to be essential, we have developed a speech activity detector (SAD) as

  16. The TNO speaker diarization system for NIST RT05s meeting data

    NARCIS (Netherlands)

    Leeuwen, D.A. van

    2006-01-01

    The TNO speaker speaker diarization system is based on a standard BIC segmentation and clustering algorithm. Since for the NIST Rich Transcription speaker dizarization evaluation measure correct speech detection appears to be essential, we have developed a speech activity detector (SAD) as well.

  17. The AMI speaker diarization system for NIST RT06s meeting data

    NARCIS (Netherlands)

    Leeuwen, D.A. van; Huijbregts, Marijn

    2006-01-01

    We describe the systems submitted to the NIST RT06s evaluation for the Speech Activity Detection (SAD) and Speaker Diarization (SPKR) tasks. For speech activity detection, a new analysis methodology is presented that generalizes the Detection Erorr Tradeoff analysis commonly used in speaker

  18. The AMI speaker diarization system for NIST RT06s meeting data

    NARCIS (Netherlands)

    van Leeuwen, David A.; Huijbregts, M.A.H.

    2007-01-01

    We describe the systems submitted to the NIST RT06s evaluation for the Speech Activity Detection (SAD) and Speaker Diarization (SPKR) tasks. For speech activity detection, a new analysis methodology is presented that generalizes the Detection Erorr Tradeoff analysis commonly used in speaker detection

  19. 76 FR 27305 - Proposed Information Collection; Comment Request; the NIST Summer Institute for Middle School...

    Science.gov (United States)

    2011-05-11

    ...) programs designed to support middle school science teachers to participate in hands-on workshops, lectures... Gaithersburg, Maryland. The workshops provide teachers with instructional information and ideas to use in their teaching, and emphasize the measurement science done at NIST. The Program provides a world-class...

  20. Resorting the NIST undulator using simulated annealing for field error reduction

    International Nuclear Information System (INIS)

    Denbeaux, Greg; Johnson, Lewis E.; Madey, John M.J.

    2000-01-01

    We have used a simulated annealing algorithm to sort the samarium cobalt blocks and vanadium permendur poles in the hybrid NIST undulator to optimize the spectrum of the emitted light. While simulated annealing has proven highly effective in sorting of the SmCo blocks in pure REC undulators, the reliance on magnetically 'soft' poles operating near saturation to concentrate the flux in hybrid undulators introduces a pair of additional variables - the permeability and saturation induction of the poles - which limit the utility of the assumption of superposition on which most simulated annealing codes rely. Detailed magnetic measurements clearly demonstrated the failure of the superposition principle due to random variations in the permeability in the 'unsorted' NIST undulator. To deal with the issue, we measured both the magnetization of the REC blocks and the permeability of the NIST's integrated vanadium permendur poles, and implemented a sorting criteria which minimized the pole-to-pole variations in permeability to satisfy the criteria for realization of superposition on a nearest-neighbor basis. Though still imperfect, the computed spectrum of the radiation from the re-sorted and annealed NIST undulator is significantly superior to that of the original, unsorted device

  1. Characterization of a traceable profiler instrument for areal roughness measurement

    International Nuclear Information System (INIS)

    Thomsen-Schmidt, P

    2011-01-01

    A two-dimensional profiler instrument was designed and realized at the PTB (Physikalisch-Technische Bundesanstalt). The main function of the instrument is to provide traceable results in the field of roughness measurement. It is equipped with a linear moving stylus which is guided by precision air bearings. The moving part of the stylus has weight around 1 g and is carried by a magnetic field. The contacting force of the tip onto the surface under test is controlled by a small voice coil actuator in a closed control loop. Vertical movements of the stylus are captured by two different, completely independent measurement systems, covering a range of 100 µm. The first one is an interferometer, which provides a traceable signal, and the second one is an inductive measurement system. The signal from the inductive measurement system is calibrated by the interferometer. The sample under test is carried within the x–y-plane by a linear guided table with low noise air bearings. These air bearings are preloaded by vacuum and a constant gap is achieved by gas pressure controllers. Both axes of the table are driven by linear voice coil actuators and their movement in the plane is measured by linear encoders. The sample carrier is equipped with two axes tilt compensation, by which the sample under test can be levelled automatically using the measurement system of the stylus. Real-time data acquisition, manual handling and automated procedures are managed by a programmable controller and proprietary software written in LabVIEW. After measurement, data from the system can be directly transferred into the smd- or sdf-format. Results of measurements on different samples to characterize the metrological behaviour of the instrument will be reported. To characterize the uncertainty of the instrument, a model is applied, which is in accordance with approved rules for contact stylus instruments

  2. Traceability of pH to the Mole

    Directory of Open Access Journals (Sweden)

    Maria Filomena Camões

    2015-08-01

    Full Text Available Free acidity of aqueous solutions was initially defined in 1909 by Søren Peter Lauritz Sørensen as pH = −lgcH+ (c/mol·dm−3 or m/mol·kg−1 of the free hydrogen ions in solution, H+ soon (1910 was changed to pH = paH+ = −lgaH+, integrating the new concepts of activity, ai and activity coefficient γi, for the ionic species i under concern, H+ in this case; it is ai = −lg(miγi. Since individual ions do not exist alone in solution, primary pH values cannot be assigned solely by experimental measurements, requiring extra thermodynamic model assumptions for the activity coefficient, γH+, which has put pH in a unique situation of not being fully traceable to the International System of Units (SI. Also the concept of activity is often not felt to be as perceptible as that of concentration which may present difficulties, namely with the interpretation of data. pH measurements on unknown samples rely on calibration of the measuring setup with adequate reference pH buffers. In this work, the assignment of pH values to buffers closely matching the samples, e.g., seawater, is revisited. An approach is presented to assess the quantity pmH+ = −lgmH+ profiting from the fact that, contrary to single ion activity coefficients, mean activity coefficients,   can be assessed based on experimentally assessed quantities alone, γExp ±, thus ensuring traceability to the mole, the SI base unit for amount of substance. Compatibility between γExp ± and mean activity coefficient calculated by means of Pitzer model equations, γPtz ±, validates the model for its intended use.

  3. Proposal of genetic traceability for Cinta Senese products

    Directory of Open Access Journals (Sweden)

    O. Franci

    2010-04-01

    Full Text Available Cinta Senese is a white belted pig breed native of Italy. This breed is characterized by an high quality meat whereas its productive and reproductive performances are poor. The breed currently produces fresh and cured products with high market price. One of the factors associated with this high price is the quality of the raw material but consumers require that Cinta Senese be the only breed involved. There are some Cinta Senese products which are currently in the process of being recognized by European Union (PDO. Nevertheless the deceitful use of more fruitful breeds is anyhow possible, therefore the institution of a protocol for a DNA-based traceability of Cinta Senese products would be desirable. Traditionally breeds were classified by their colour or type so that over time a Standard of Excellence (phenotypic conformity was developed to define phenotype and supplemented by pedigree information. One of the main distinguishing features for pig breeds is coat colour and pattern. Two loci, Extension and Dominant White have a major influence on coat colour. The genes involved have been identified (MC1R and KIT respectively, variants have been described and associations with breed and colour determined (Giuffra et al., 2002, Johansson Moller et al., 1996, Kijas et al., 1998, 2001, Marklund et al., 1998, Pielberg et al., 2002. All the assayed mutations are causal of the investigated phenomena. These polymorphisms could play an important role in Quality Assurance programmes and maintenance of brand identity. The aim of this work was the study of these polymorphisms in Cinta Senese breed and the final purpose was the establishment of a DNA-based traceability protocol of Cinta Senese products.

  4. Traceable calibration of hospital 192Ir HDR sources

    International Nuclear Information System (INIS)

    Govinda Rajan, K.N.; Bhatt, B.C.; Pendse, A.M.; Kannan, V.

    2002-01-01

    Presently, no primary standard exists for the standardization of remote afterloading 192 Ir HDR sources. These sources are, therefore, being standardized by a few Secondary Standard Dosimetry Laboratories (SSDLs), in terms of Air Kerma Strength (AKS) or Reference Air Kerma Rate (RAKR) using a 0.6 cc Farmer type chamber, set up as an Interim Standard. These SSDLs offer calibration to well type of ionization chambers that are normally used by the hospitals for calibrating the 192 lr HDR source. Presently, in many countries, including India, well chambers are not commercially available. Nor do these countries offer any calibration service for 192 lr HDR source. With the result users make use of well chambers imported from different countries with their calibration traceable to the country of origin. Since no intercomparisons between these countries have been reported, the measurement consistency between hospitals becomes questionable. The problem is compounded by the fact that these chambers are used for several years without re-calibration since no calibration service is locally available. For instance, in India, the chambers have been in use in hospitals, since 1994, without a second calibration. Not all hospitals use the well chamber for the calibration of the 192 lr HDR source. Many hospitals make use of 0.6 cc chambers, in air, at short source to chamber distances, for measuring the AKS of the source. The latter method is prone to much larger inaccuracy due to the use of very short source to chamber distances without proper calibration jigs, use of 60 Co calibration factor for 192 Ir HDR source calibrations, neglecting correction factors for room scatter, fluence non-uniformity, use of arbitrary buildup factors for the buildup cap of the chamber etc. A comparison of the procedures used at hospitals revealed that various arbitrary methods are in use at hospitals. An indigenously developed well chamber was calibrated against a Reference Standard traceable to the

  5. Development of a traceability analysis method based on case grammar for NPP requirement documents written in Korean language

    International Nuclear Information System (INIS)

    Yoo, Yeong Jae; Seong, Poong Hyun; Kim, Man Cheol

    2004-01-01

    Software inspection is widely believed to be an effective method for software verification and validation (V and V). However, software inspection is labor-intensive and, since it uses little technology, software inspection is viewed upon as unsuitable for a more technology-oriented development environment. Nevertheless, software inspection is gaining in popularity. KAIST Nuclear I and C and Information Engineering Laboratory (NICIEL) has developed software management and inspection support tools, collectively named 'SIS-RT.' SIS-RT is designed to partially automate the software inspection processes. SIS-RT supports the analyses of traceability between a given set of specification documents. To make SIS-RT compatible for documents written in Korean, certain techniques in natural language processing have been studied. Among the techniques considered, case grammar is most suitable for analyses of the Korean language. In this paper, we propose a methodology that uses a case grammar approach to analyze the traceability between documents written in Korean. A discussion regarding some examples of such an analysis will follow

  6. A methodology for improving the SIS-RT in analyzing the traceability of the documents written in Korean language

    International Nuclear Information System (INIS)

    Yoo, Yeong Jae; Kim, Man Cheol; Seong, Poong Hyun

    2002-01-01

    Inspection is widely believed to be an effective software verification and validation (V and V) method. However, software inspection is labor-intensive. This labor-intensive nature is compounded by a view that since software inspection uses little technology, they do not fit in well with a more technology-oriented development environment. Nevertheless, software inspection is gaining in popularity. The researchers of KAIST I and C laboratory developed the software tool managing and supporting inspection tasks, named SIS-RT. SIS-RT is designed to partially automate the software inspection processes. SIS-RT supports the analyses of traceability between the spec documents. To make SIS-RT prepared for the spec document written in Korean language, certain techniques in natural language processing have been reviewed. Among those, the case grammar is most suitable for the analyses of Korean language. In this paper, the methodology for analyzing the traceability between spec documents written in Korean language will be proposed based on the case grammar

  7. Proceedings of the November 2011 Traceability Research Summit: this report is the third in a series on Traceability Summits sponsored by IFT beginning in July 2011.

    Science.gov (United States)

    Hickey, Caitlin; Bhatt, Tejas

    2013-12-01

    Fifty thought leaders in the area of food traceability met for a 3rd time to discuss methodologies and finalize the principles that define their vision for traceability. Participants in the summit included representatives from industry, trade associations, government, academia, consumer groups, and more. One main focus of this summit included a discussion on the current regulations and voluntary initiatives in place regarding traceability. Overall, it was recognized that the recommendations from this summit group would be more specific and stringent in comparison to these current regulations and initiatives. The participants sought to be leaders in the traceability arena, with their recommendations leading the industry to optimal traceability systems and methods. Participants agreed on many principles for their vision of traceability, emphasizing the importance of access to traceability data. They discussed having industry be asked for "basic" tracing data prior to the need for a large-scale investigation, having standards for sharing data, and having the data in electronic form. Participants foresaw the importance of capturing data electronically in the future, although they recognized that many firms do not currently do this. The group also saw a need for a transition period to implement changes, and to provide implementation training and resource aid to small businesses. Summit participants discussed specific definitions and examples for key data elements and critical tracking events that could be used by industry to capture tracing data at specific points within the supply chain. Overall, participants refined the goals of the summit group and started to identify specific ways to achieve those goals. © 2013 Institute of Food Technologists®

  8. The perceived value of dairy product traceability in modern society: An exploratory study.

    Science.gov (United States)

    Charlebois, Sylvain; Haratifar, Sanaz

    2015-05-01

    The current study assessed the perceived value of food traceability in modern society by young consumers. After experiencing numerous recalls and food safety-related incidences, consumers are increasingly aware of the tools available to mitigate risks. Food traceability has been associated with food safety procedures for many years, but recent high-profile cases of food fraud around the world have given traceability a different strategic purpose. Focusing solely on dairy products, our survey results offer a glimpse of consumer perceptions of traceability as a means to preserve food integrity and authenticity. This study explored the various influences that market-oriented traceability has had on dairy consumers. For example, results show that if the dairy sector could guarantee that their product is in fact organic, 53.8% of respondents who often purchase organic milk would consider always purchasing traceable organic milk. This research produced a quantitative set of information related to the perceived value of food traceability, which could be useful for the creation and development of improved guidelines and better education for consumers. We discuss limitations and suggest areas for new research. Copyright © 2015 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

  9. SI-traceability of reference materials and reference measurements: From ignoring to realizing

    International Nuclear Information System (INIS)

    Bievre, P. de; Taylor, P.D.P.

    2002-01-01

    Basic principles of traceability of measurements in and to the SI system in general and for measurements of amount of substance in particular are described. Analogies with long-standing traceability schemes in physical measurements are shown and attempts are made to indicate what - as yet barely existing - traceability of amount (-of-substance) measurements could be. The recent start of the CGPM/CIPM/CCQM/BIPM involvement in the field of measurements indicated and possible tasks suggested for these scientific (and legal) guards of the international system of measurements SI (Systeme International). (author)

  10. Assessment of stability of trace elements in two natural matrix environmental standard reference materials. NIST-SRM 1547 Peach leaves and NIST-SRM 1566a Oyster Tissue

    International Nuclear Information System (INIS)

    Mackey, E.A.; Spatz, R.O.

    2009-01-01

    The NIST program for environmental Standard Reference Materials (SRM) includes materials covering a range of matrices, mass fraction values and analytes. For many SRMs, mass fraction data are accumulated, incidentally, over time, as these are used routinely for quality assurance purposes. Although these are not formal stability studies, data generated may be useful in assessing stability. To evaluate the potential for assessing material stability from incidental use of SRMs, results of neutron activation analysis performed from 1992 through 2008 were compiled for SRM 1547 Peach Leaves and SRM 1566a Oyster Tissue. Results indicate that incidental use of SRMs yields useful information on SRM stability. (author)

  11. Characterization of the NIST shellfish Standard Reference Material 4358

    International Nuclear Information System (INIS)

    Nour, S.; Inn, K.G.W.; Filliben, J.; Gaast van der, H.; Men, L.C.; Calmet, D.; Altzitzoglou, T.; Povinec, P.; Takata, Y.; Wisdom, M.

    2013-01-01

    A new shellfish Standard Reference Material 4358 was developed by the National Institute of Standards and Technology through an international interlaboratory comparison that involved twelve laboratories-participants from nine countries. The results from the participants were statistically evaluated, and the most robust certified values were based on the median of laboratories’ reported means and the uncertainties derived using the bootstrap method. Massic activity certified values were established for fourteen radionuclides, five activity ratios, and informational massic activity values for eight more radionuclides and two activity ratios. (author)

  12. Calibrating NIST SRM 683 as A New International Reference Standard for Zn Isotopes

    Science.gov (United States)

    Yang, Y.; Zhang, X.; Yu, H.; Huang, F.

    2017-12-01

    Zinc isotopes have been widely applied in the cosmochemical, geochemical, and environmental studies (Moynier et al. 2017). Obtaining precise Zn isotopic data for inter-laboratory comparison is a prerequisite to these applications. Currently, the JMC3-0749L is the primary reference standard for Zn isotopes (Albarède 2004), but it is not commercially available now. Thus, it is necessary to calibrate a new international primary reference standard for Zn isotopic analysis. Chen et al. (2016) showed that NIST SRM 683 (a pure Zn metal nugget of 140 grams) has a δ66ZnJMC of 0.12‰, which is falling within the range of natural Zn isotopic compositions, and it may a good candidate for the next generation of international reference standard (Chen et al. 2016). In order to further examine whether NIST SRM 683 has a homogeneous Zn isotopic composition, we measured more NIST SRM 683 by double-spike methods using MC-ICPMS (Conway et al. 2013). The metal nuggets of NIST SRM 683 were intensively sampled by micro-drilling. Zinc isotope analyses for two nuggets show that they have δ66Zn of 0.14 ± 0.02‰ (2SD, N = 32) and 0.13 ± 0.02‰ (2SD, N = 33), respectively. These values are similar to those of two Zn metal nuggets (0.11 ± 0.02‰ vs. 0.12 ± 0.02‰) reported previously by Chen et al. (2016). We fully dissolved one nugget, producing pure Zn solution with identical Zn isotopic composition with the drilling samples. All results strongly support that NIST SRM 683 is homogeneous in Zn isotopic compositions which could be an ideal candidate for the next reference for Zn isotopes. Tests on more metal nuggets will be performed in a few months for further confirming the Zn isotope compositions and homogeneity. Reference: Albarède et al., 2004. 'The stable isotope geochemistry of copper and zinc', Reviews in Mineralogy and Geochemistry, 55: 409-27. Chen et al., 2016. 'Zinc Isotopic Compositions of NIST SRM 683 and Whole-Rock Reference Materials', Geostandards and

  13. Knowledge representation in safety assessment: improving transparency and traceability

    Energy Technology Data Exchange (ETDEWEB)

    Lemos, F.L. de [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Sullivan, T. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Ross, T. [University of New Mexico (UNM), Albuquerque, NM (United States); Guimaraes, L.N.F. [Instituto de Estudos Avancados (IEAv/CTA), Sao Jose dos Campos, SP (Brazil)

    2011-07-01

    Transparency and traceability are key factors for confidence building, acceptability, and quality enhancement of the safety assessment, and safety case for a radioactive waste disposal facility. In order to facilitate analysis and promote discussions, all of the information used to make decisions should be readily available to stake holders. The information should convey a good understanding of the intermediate decisions processes, allowing examination of alternatives and 'what if questions'. In an ideal situation all stake holders, including scientists and the public, should be able to follow the path of a certain parameter, from the beginning where it was defined, its assumptions and uncertainties, throughout the calculations until the final results of the safety assessment. One of the main challenges, to achieving such a transparency and traceability, is that stake holders are a very diverse audience, with very different backgrounds. This could require preparation of various versions of the same documentation, which would be impractical. While the linguistic information is of crucial importance to understanding the reasoning, it is very difficult to convey the supporting conditions, and consequent uncertainties for the selection of parameters values. Even scientists involved in the process can become confused due to the overwhelming amount of information that is used to support parameter value selection. The amount of details makes it difficult to track the decisions, which lead to the selection of a certain parameter, throughout the calculations. This paper presents a methodology to represent the linguistic information used in the safety assessment in terms of mathematical expressions by using the fuzzy sets and fuzzy logic tools. This methodology aims to help information to be readily available while keeping, as much as possible, the original meaning of the linguistic expressions and, consequently, to be available at any time as a quick reference

  14. Knowledge representation in safety assessment: improving transparency and traceability

    International Nuclear Information System (INIS)

    Lemos, F.L. de; Sullivan, T.; Ross, T.; Guimaraes, L.N.F.

    2011-01-01

    Transparency and traceability are key factors for confidence building, acceptability, and quality enhancement of the safety assessment, and safety case for a radioactive waste disposal facility. In order to facilitate analysis and promote discussions, all of the information used to make decisions should be readily available to stake holders. The information should convey a good understanding of the intermediate decisions processes, allowing examination of alternatives and 'what if questions'. In an ideal situation all stake holders, including scientists and the public, should be able to follow the path of a certain parameter, from the beginning where it was defined, its assumptions and uncertainties, throughout the calculations until the final results of the safety assessment. One of the main challenges, to achieving such a transparency and traceability, is that stake holders are a very diverse audience, with very different backgrounds. This could require preparation of various versions of the same documentation, which would be impractical. While the linguistic information is of crucial importance to understanding the reasoning, it is very difficult to convey the supporting conditions, and consequent uncertainties for the selection of parameters values. Even scientists involved in the process can become confused due to the overwhelming amount of information that is used to support parameter value selection. The amount of details makes it difficult to track the decisions, which lead to the selection of a certain parameter, throughout the calculations. This paper presents a methodology to represent the linguistic information used in the safety assessment in terms of mathematical expressions by using the fuzzy sets and fuzzy logic tools. This methodology aims to help information to be readily available while keeping, as much as possible, the original meaning of the linguistic expressions and, consequently, to be available at any time as a quick reference. This would

  15. Si-Traceable Scale for Measurements of Radiocarbon Concentration

    Science.gov (United States)

    Hodges, Joseph T.; Fleisher, Adam J.; Liu, Qingnan; Long, David A.

    2017-06-01

    Radiocarbon (^{14}C) dating of organic materials is based on measuring the ^{14}C/^{12}C atomic fraction relative to the nascent value that existed when the material was formed by photosynthetic conversion of carbon dioxide present in the atmosphere. This field of measurement has numerous applications including source apportionment of anthropogenic and biogenic fuels and combustion emissions, carbon cycle dynamics, archaeology, and forensics. Accelerator mass spectrometry (AMS) is the most widely used method for radiocarbon detection because it can measure extremely small amounts of radiocarbon (background of nominally 1.2 parts-per-trillion) with high relative precision (0.4 %). AMS measurements of radiocarbon are typically calibrated by reference to standard oxalic-acid (C_2H_2O_4) samples of known radiocativity that are derived from plant matter. Specifically, the internationally accepted absolute dating reference for so-called "modern-equivalent" radiocarbon is 95 % of the specific radioactivity in AD 1950 of the National Bureau of Standards (NBS) oxalic acid standard reference material and normalized to δ^{13}C_{VPDB} = 19 per mil. With this definition, a "modern-equivalent" corresponds to 1.176(70) parts-per-trillion of ^{14}C relative to total carbon content. As an alternative radiocarbon scale, we propose an SI-traceable method to determine ^{14}C absolute concentration which is based on linear Beer-Lambert-law absorption measurements of selected ^{14}C^{16}O_2 ν_3-band line areas. This approach is attractive because line intensities of chosen radiocarbon dioxide transitions can be determined by ab initio calculations with relative uncertainties below 0.5 %. This assumption is justified by the excellent agreement between theoretical values of line intensities and measurements for stable isotopologues of CO_2. In the case of cavity ring-down spectroscopy (CRDS) measurements of ^{14}C^{16}O_2 peak areas, we show that absolute, SI-traceable concentrations of

  16. TOPICAL REVIEW: Advances in traceable nanometrology at the National Physical Laboratory†Advances in traceable nanometrology at the National Physical Laboratory

    Science.gov (United States)

    Leach, Richard; Haycocks, Jane; Jackson, Keith; Lewis, Andrew; Oldfield, Simon; Yacoot, Andrew

    2001-03-01

    The only difference between nanotechnology and many other fields of science or engineering is that of size. Control in manufacturing at the nanometre scale still requires accurate and traceable measurements whether one is attempting to machine optical quality glass or write one's company name in single atoms. A number of instruments have been developed at the National Physical Laboratory that address the measurement requirements of the nanotechnology community and provide traceability to the definition of the metre. The instruments discussed in this paper are an atomic force microscope and a surface texture measuring instrument with traceable metrology in all their operational axes, a combined optical and x-ray interferometer system that can be used to calibrate displacement transducers to subnanometre accuracy and a co-ordinate measuring machine with a working volume of (50 mm)3 and 50 nm volumetric accuracy.

  17. Traceable working standards with SI units of radiance for characterizing the measurement performance of investigational clinical NIRF imaging devices

    Science.gov (United States)

    Zhu, Banghe; Rasmussen, John C.; Litorja, Maritoni; Sevick-Muraca, Eva M.

    2017-03-01

    All medical devices for Food and Drug market approval require specifications of performance based upon International System of Units (SI) or units derived from SI for reasons of traceability. Recently, near-infrared fluorescence (NIRF) imaging devices of a variety of designs have emerged on the market and in investigational clinical studies. Yet the design of devices used in the clinical studies vary widely, suggesting variable device performance. Device performance depends upon optimal excitation of NIRF imaging agents, rejection of backscattered excitation and ambient light, and selective collection of fluorescence emanating from the fluorophore. There remains no traceable working standards with SI units of radiance to enable prediction that a given molecular imaging agent can be detected in humans by a given NIRF imaging device. Furthermore, as technologies evolve and as NIRF imaging device components change, there remains no standardized means to track device improvements over time and establish clinical performance without involving clinical trials, often costly. In this study, we deployed a methodology to calibrate luminescent radiance of a stable, solid phantom in SI units of mW/cm2/sr for characterizing the measurement performance of ICCD and IsCMOS camera based NIRF imaging devices, such as signal-to-noise ratio (SNR) and contrast. The methodology allowed determination of superior SNR of the ICCD over the IsCMOS system; comparable contrast of ICCD and IsCMOS depending upon binning strategies.

  18. Retrospective Analysis of NIST Standard Reference Material 1450, Fibrous Glass Board, for Thermal Insulation Measurements

    Science.gov (United States)

    Zarr, Robert R; Heckert, N Alan; Leigh, Stefan D

    2014-01-01

    Thermal conductivity data acquired previously for the establishment of Standard Reference Material (SRM) 1450, Fibrous Glass Board, as well as subsequent renewals 1450a, 1450b, 1450c, and 1450d, are re-analyzed collectively and as individual data sets. Additional data sets for proto-1450 material lots are also included in the analysis. The data cover 36 years of activity by the National Institute of Standards and Technology (NIST) in developing and providing thermal insulation SRMs, specifically high-density molded fibrous-glass board, to the public. Collectively, the data sets cover two nominal thicknesses of 13 mm and 25 mm, bulk densities from 60 kg·m−3 to 180 kg·m−3, and mean temperatures from 100 K to 340 K. The analysis repetitively fits six models to the individual data sets. The most general form of the nested set of multilinear models used is given in the following equation: λ(ρ,T)=a0+a1ρ+a2T+a3T3+a4e−(T−a5a6)2where λ(ρ,T) is the predicted thermal conductivity (W·m−1·K−1), ρ is the bulk density (kg·m−3), T is the mean temperature (K) and ai (for i = 1, 2, … 6) are the regression coefficients. The least squares fit results for each model across all data sets are analyzed using both graphical and analytic techniques. The prevailing generic model for the majority of data sets is the bilinear model in ρ and T. λ(ρ,T)=a0+a1ρ+a2T One data set supports the inclusion of a cubic temperature term and two data sets with low-temperature data support the inclusion of an exponential term in T to improve the model predictions. Physical interpretations of the model function terms are described. Recommendations for future renewals of SRM 1450 are provided. An Addendum provides historical background on the origin of this SRM and the influence of the SRM on external measurement programs. PMID:26601034

  19. Importance of Requirements Analysis & Traceability to Improve Software Quality and Reduce Cost and Risk

    Science.gov (United States)

    Kapoor, Manju M.; Mehta, Manju

    2010-01-01

    The goal of this paper is to emphasize the importance of developing complete and unambiguous requirements early in the project cycle (prior to Preliminary Design Phase). Having a complete set of requirements early in the project cycle allows sufficient time to generate a traceability matrix. Requirements traceability and analysis are the key elements in improving verification and validation process, and thus overall software quality. Traceability can be most beneficial when the system changes. If changes are made to high-level requirements it implies that low-level requirements need to be modified. Traceability ensures that requirements are appropriately and efficiently verified at various levels whereas analysis ensures that a rightly interpreted set of requirements is produced.

  20. Detection and traceability of genetically modified organisms in the food production chain

    NARCIS (Netherlands)

    Miraglia, M.; Berdal, K.G.; Brera, C.; Corbisier, P.; Holst - Jensen, A.; Kok, E.J.; Marvin, H.J.P.; Schimmel, H.; Rentsch, J.; Rie, van J.P.P.F.; Zagon, J.

    2004-01-01

    Both labelling and traceability of genetically modified organisms are current issues that are considered in trade and regulation. Currently, labelling of genetically modified foods containing detectable transgenic material is required by EU legislation. A proposed package of legislation would extend

  1. A PetriNet-Based Approach for Supporting Traceability in Cyber-Physical Manufacturing Systems.

    Science.gov (United States)

    Huang, Jiwei; Zhu, Yeping; Cheng, Bo; Lin, Chuang; Chen, Junliang

    2016-03-17

    With the growing popularity of complex dynamic activities in manufacturing processes, traceability of the entire life of every product has drawn significant attention especially for food, clinical materials, and similar items. This paper studies the traceability issue in cyber-physical manufacturing systems from a theoretical viewpoint. Petri net models are generalized for formulating dynamic manufacturing processes, based on which a detailed approach for enabling traceability analysis is presented. Models as well as algorithms are carefully designed, which can trace back the lifecycle of a possibly contaminated item. A practical prototype system for supporting traceability is designed, and a real-life case study of a quality control system for bee products is presented to validate the effectiveness of the approach.

  2. A PetriNet-Based Approach for Supporting Traceability in Cyber-Physical Manufacturing Systems

    Directory of Open Access Journals (Sweden)

    Jiwei Huang

    2016-03-01

    Full Text Available With the growing popularity of complex dynamic activities in manufacturing processes, traceability of the entire life of every product has drawn significant attention especially for food, clinical materials, and similar items. This paper studies the traceability issue in cyber-physical manufacturing systems from a theoretical viewpoint. Petri net models are generalized for formulating dynamic manufacturing processes, based on which a detailed approach for enabling traceability analysis is presented. Models as well as algorithms are carefully designed, which can trace back the lifecycle of a possibly contaminated item. A practical prototype system for supporting traceability is designed, and a real-life case study of a quality control system for bee products is presented to validate the effectiveness of the approach.

  3. Geant4 simulations of NIST beam neutron lifetime experiment

    Science.gov (United States)

    Valete, Daniel; Crawford, Bret; BL2 Collaboration Collaboration

    2017-09-01

    A free neutron is unstable and its decay is described by the Standard Model as the transformation of a down quark into an up quark through the weak interaction. Precise measurements of the neutron lifetime test the validity of the theory of the weak interaction and provide useful information for the predictions of the theory of Big Bang nucleosynthesis of the primordial helium abundance in the universe and the number of different types of light neutrinos Nν. The predominant experimental methods for determination of the neutron lifetime are commonly called `beam' and `bottle' methods, and the most recent uses of each method do not agree with each other within their stated uncertainties. An improved experiment of the beam technique, which uses magnetic and electric fields to trap and guide the decay protons of a beam of cold neutrons to a detector, is in progress at the National Institute of Standards and Technology, Gaithersburg, MD with a precision goal of 0.1. I acknowledge the support of the Cross-Diciplinary Institute at Gettysburg College.

  4. Establishment of Traceability of Reference Grade Hydrometers at National Physical Laboratory, India (npli)

    Science.gov (United States)

    Kumar, Anil; Kumar, Harish; Mandal, Goutam; Das, M. B.; Sharma, D. C.

    The present paper discusses the establishment of traceability of reference grade hydrometers at National Physical Laboratory, India (NPLI). The reference grade hydrometers are calibrated and traceable to the primary solid density standard. The calibration has been done according to standard procedure based on Cuckow's Method and the reference grade hydrometers calibrated covers a wide range. The uncertainty of the reference grade hydrometers has been computed and corrections are also calculated for the scale readings, at which observations are taken.

  5. Application of the concept of traceability to the management of nuclear data

    International Nuclear Information System (INIS)

    Furnari, J.C.; Cohen, I.M.

    1998-01-01

    The connotations of the quality of nuclear data in the quality of experimental results are discussed. The authors show the analogies existent between metrological standards and literature data and propose the adoption of the concept of traceability of nuclear data. The conditions to be fulfilled for the publication of nuclear data, concerning the establishment of traceability, are discussed. Criteria for renormalization are presented. The requirements of nuclear data in neutron activation analysis and the role of the analyst are discussed

  6. Development on traceability based on changes of stable isotopes in animal tissues and organs

    International Nuclear Information System (INIS)

    Cai Xianfeng; Guo Boli; Wei Yimin; Sun Shumin; Wei Shuai

    2011-01-01

    Stable isotope analysis is a new method in food traceability, which can be used to trace animals' geographical origin and life history. This paper reviews the recent progress of researches on characteristics of stable isotopes and turnover time in different animal tissues and organs, as well as their influence caused by feed, drinking water, geographical origin, storing and processing. The aim of this paper is to provide theoretical reference for studies on the traceability of animal derived food and animals' life history. (authors)

  7. Update of NIST half-life results corrected for ionization chamber source-holder instability

    International Nuclear Information System (INIS)

    Unterweger, M.P.; Fitzgerald, R.

    2014-01-01

    As reported at the ICRM 2011, it was discovered that the source holder used for calibrations in the NIST 4πγ ionization chamber (IC) was not stable. This has affected a large number of half-life measurement results previously reported and used in compilations of nuclear data. Corrections have been made on all of the half-life data based on the assumption that the changes to the ionization chamber response were gradual. The corrections are energy dependent and therefore radionuclide specific. This presentation will review our results and present the recommended changes in half-life values and/or uncertainties. - Highlights: • The NIST half-life data is corrected for sample positioning variations and refitted. • These results are reported and increased errors in the reported values are given. • Longer lived radionuclides are discussed

  8. Experimental efforts at NIST towards one-electron ions in circular Rydberg states

    International Nuclear Information System (INIS)

    Tan, Joseph N; Guise, Nicholas D; Brewer, Samuel M

    2011-01-01

    Experimental effort is underway at NIST to enable tests of theory with one-electron ions synthesized in circular Rydberg states from captured bare nuclei. Problematic effects that limit the accuracy of predicted energy levels for low-lying states are vanishingly small for high-angular-momentum (high-L) states; in particular, the nuclear size correction for high-L states is completely negligible for any foreseeable improvement of measurement precision. As an initial step towards realizing such states, highly charged ions are extracted from the NIST electron beam ion trap (EBIT) and steered through the electrodes of a Penning trap. The goal is to capture bare nuclei in the Penning trap for experiments to make one-electron atoms in circular Rydberg states with dipole (E1) transitions in the optical domain accessible to a frequency comb.

  9. Integrated analytical approaches for food traceability and pollution control

    International Nuclear Information System (INIS)

    2012-11-01

    It developed in the laboratory of Food Science of the Montevideo commissariat a regional workshop with the following aims:To evaluate the effect of vegetable matrices on the determination of pesticides through analysis by GC / M S. For the implementation and application of these tests, it was applied the Laboratory s protocol which it was distributed to all members of the working group. It worked with a matrix lettuce, chard and a mix of green leafy vegetables , evaluating the matrix effect in the following pesticides: chloropyrifos, procimidione, L-cyhalothrin, azoxystrobin, trifluralin and fenbuconazole, using heptachlor as internal standard.They carried out in five concentration levels, in triplicate tests, applying the techniques of extraction by QuEChERS (kit agile nt). Prepared samples are injected into the GC / M S equipment, an analysis of the results were evaluated by the working group. Furthermore this regional workshop was about nuclear techniques role in agricultural practice, the traceability and pollution control, laboratory services and farmers relationships, environmental, economic, social and political impact, pest prevention and animal diseases, risk, the human health, environment protection in the agricultural and the pesticides uses.

  10. Applicability of SCAR markers to food genomics: olive oil traceability.

    Science.gov (United States)

    Pafundo, Simona; Agrimonti, Caterina; Maestri, Elena; Marmiroli, Nelson

    2007-07-25

    DNA analysis with molecular markers has opened a shortcut toward a genomic comprehension of complex organisms. The availability of micro-DNA extraction methods, coupled with selective amplification of the smallest extracted fragments with molecular markers, could equally bring a breakthrough in food genomics: the identification of original components in food. Amplified fragment length polymorphisms (AFLPs) have been instrumental in plant genomics because they may allow rapid and reliable analysis of multiple and potentially polymorphic sites. Nevertheless, their direct application to the analysis of DNA extracted from food matrixes is complicated by the low quality of DNA extracted: its high degradation and the presence of inhibitors of enzymatic reactions. The conversion of an AFLP fragment to a robust and specific single-locus PCR-based marker, therefore, could extend the use of molecular markers to large-scale analysis of complex agro-food matrixes. In the present study is reported the development of sequence characterized amplified regions (SCARs) starting from AFLP profiles of monovarietal olive oils analyzed on agarose gel; one of these was used to identify differences among 56 olive cultivars. All the developed markers were purposefully amplified in olive oils to apply them to olive oil traceability.

  11. NIST ThermoData Engine: Extension to Solvent Design and Propagation of Uncertainties for Process Simulation

    DEFF Research Database (Denmark)

    Diky, Vladimir; Chirico, Robert D.; Muzny, Chris

    ThermoData Engine (TDE, NIST Standard Reference Databases 103a and 103b) is the first product that implements the concept of Dynamic Data Evaluation in the fields of thermophysics and thermochemistry, which includes maintaining the comprehensive and up-to-date database of experimentally measured ...... uncertainties, curve deviations, and inadequacies of the models. Uncertainty analysis shows relative contributions to the total uncertainty from each component and pair of components....

  12. Test of sup 3 He-based neutron polarizers at NIST

    CERN Document Server

    Jones, G L; Thompson, A K; Chowdhuri, Z; Dewey, M S; Snow, W M; Wietfeldt, F E

    2000-01-01

    Neutron spin filters based on polarized sup 3 He are useful over a wide neutron energy range and have a large angular acceptance among other advantages. Two optical pumping methods, spin-exchange and metastability-exchange, can produce the volume of highly polarized sup 3 He gas required for such neutron spin filters. We report a test of polarizers based on each of these two methods on a new cold, monochromatic neutron beam line at the NIST Center for Neutron Research.

  13. Liquid Scintillation counting Standardization of 22 NaCl by the CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Grau Carles, A.; Grau Malonda, A.

    1995-09-01

    We describe a procedure for preparing a stable solution of ''22 NaCl for liquid scintillation counting and its counting stability and spectral evolution in Insta-Gel''R is studied. The solution has been standardised in terms of activity concentration by the CIEMAT/NIST method with discrepancies between experimental and computed efficiencies lower than 0.4/% and an overall uncertainty of 0.35%

  14. Liquid Scintillation Counting Standardization of 22NaCl by te CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Grau Carles, A.; Grau Malonda, A.

    1995-01-01

    We describe a procedure for preparing a stable solution of ''22NaCl for liquid scintillation counting and its counting stability and spectral evolution in Insta-Gel''R is studied. The solution has been standardised in terms of activity concentration by the CIEMAT/NIST method with discrepancies between experimental and computed efficiencies lower than 0.4 % and an overall uncertainty of 0.35 %. (Author) 4 refs

  15. The determinants of voluntary traceability standards. The case of the wine sector

    Directory of Open Access Journals (Sweden)

    Stefanella Stranieri

    2018-06-01

    Full Text Available The aim of this paper is to study the determinants leading firms to choose among different kinds of voluntary traceability standards in the wine sector. To achieve this goal, we referred both to individual and institutional-level determinants, which are identified to play an important role in the literature related to the implementation of quality and safety standards. In specific, we referred to two theoretical approaches to better understand the industry behaviour towards the adoption of voluntary traceability, i.e. the Theory of Reasoned Action and the Institutional Theory. We developed a vis-à-vis survey through a questionnaire on a sample of Italian wineries approached during the most important Italian wine exhibitions in 2016. The results suggest that when wineries show positive cognitive beliefs towards voluntary traceability standards, they will probably implement complex traceability systems, which require high investments and efforts for their management. On the contrary, when the institutional environment plays a key role in the perception of wine processors, a simple and flexible traceability system seems to be preferred. Keywords: Voluntary traceability standards, Institutional determinants, Cognitive determinants

  16. Covariance methodology applied to 35S disintegration rate measurements by the CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Koskinas, M.F.; Nascimento, T.S.; Yamazaki, I.M.; Dias, M.S.

    2014-01-01

    The Nuclear Metrology Laboratory (LMN) at IPEN is carrying out measurements in a LSC (Liquid Scintillation Counting system), applying the CIEMAT/NIST method. In this context 35 S is an important radionuclide for medical applications and it is difficult to be standardized by other primary methods due to low beta ray energy. The CIEMAT/NIST is a standard technique used by most metrology laboratories in order to improve accuracy and speed up beta emitter standardization. The focus of the present work was to apply the covariance methodology for determining the overall uncertainty in the 35 S disintegration rate. All partial uncertainties involved in the measurements were considered, taking into account all possible correlations between each pair of them. - Highlights: ► 35 S disintegration rate measured in Liquid Scintillator system using CIEMAT/NIST method. ► Covariance methodology applied to the overall uncertainty in the 35 S disintegration rate. ► Monte Carlo simulation was applied to determine 35 S activity in the 4πβ(PC)-γ coincidence system

  17. NIST Accelerator Facilities And Programs In Support Of Industrial Radiation Research

    International Nuclear Information System (INIS)

    Bateman, F.B.; Desrosiers, M.F.; Hudson, L.T.; Coursey, B.M.; Bergstrom, P.M. Jr.; Seltzer, S.M.

    2003-01-01

    NIST's Ionizing Radiation Division maintains and operates three electron accelerators used in a number of applications including waste treatment and sterilization, radiation hardness testing, detector calibrations and materials modification studies. These facilities serve a large number of governmental, academic and industrial users as well as an active intramural research program. They include a 500 kV cascaded-rectifier accelerator, a 2.5 MV electron Van de Graaff accelerator and a 7 to 32 MeV electron linac, supplying beams ranging in energy from a few keV up to 32 MeV. In response to the recent anthrax incident, NIST along with the US Postal Service and the Armed Forces Radiobiology Research Institute (AFRRI) are working to develop protocols and testing procedures for the USPS mail sanitization program. NIST facilities and personnel are being employed in a series of quality-assurance measurements for both electron- and photon-beam sanitization. These include computational modeling, dose verification and VOC (volatile organic compounds) testing using megavoltage electron and photon sources

  18. ePedigree Traceability System for the Agricultural Food Supply Chain to Ensure Consumer Health

    Directory of Open Access Journals (Sweden)

    Umar Farooq

    2016-08-01

    Full Text Available Sustainability relies on the environmental, social and economical systems: the three pillars of sustainability. The social sustainability mostly advocates the people’s welfare, health, safety, and quality of life. In the agricultural food industry, the aspects of social sustainability, such as consumer health and safety have gained substantial attention due to the frequent cases of food-borne diseases. The food-borne diseases due to the food degradation, chemical contamination and adulteration of food products pose a serious threat to the consumer’s health, safety, and quality of life. To ensure the consumer’s health and safety, it is essential to develop an efficient system which can address these critical social issues in the food distribution networks. This research proposes an ePedigree (electronic pedigree traceability system based on the integration of RFID and sensor technology for real-time monitoring of the agricultural food to prevent the distribution of hazardous and adulterated food products. The different aspects regarding implementation of the proposed system in food chains are analyzed and a feasible integrated solution is proposed. The performance of the proposed system is evaluated and finally, a comprehensive analysis of the proposed ePedigree system’s impact on the social sustainability in terms of consumer health and safety is presented.

  19. 基于区块链的第三代中药追溯平台构建研究%Research for Platform Construction of the Third Generation of Traceability for TCM Based on the Blockchain

    Institute of Scientific and Technical Information of China (English)

    温川飙; 赵姝婷; 陈菊; 施明毅; 高原

    2017-01-01

    本文回顾了中药追溯技术发展的8年历程,从基本架构、应用开发到开放平台的三个阶段,探讨中药追溯体系当前面临的主要技术问题和解决思路,重点阐述基于区块链技术的第三代中药追溯平台的开放共享架构原理和方法,讨论物联网、大数据、标准化和接口规范等关键技术对去中心化中药追溯平台构建的意义和作用,为新一代中药追溯体系提供建设思路.%This paper reviews the development of traceability technology for Traditional Chinese Medicine (TCM) backing 8 years,from the stage of the basic architecture,application development to the open platform,to explore the main technical problems of traceability system for TCM facing and solutions,focusing on the blockchain technology of the third-generation TCM traceability platform of open architecture based on the principle and method of sharing.Finally the paper discuss the key technologies,such as the Internet of things,big data,standardization and interface specification,make great significance and function to the construction of the decentralized traceability platform for TCM,which will provide the construction ideas for the new generation of traceability system for TCM.

  20. TACO - a framework for traceability and communication of requirements

    International Nuclear Information System (INIS)

    Sivertsen, Terje; Fredriksen, Rune; Thunem, Atoosa P-J.; Valkonen, Janne; Holmberg, Jan-Erik; Ventae, Olli; Andersson, Jan-Ove

    2005-06-01

    Several cases from the nuclear industry indicate the importance of clear, complete, and stable requirements from the beginning of the system development project. Since the safety of digital I and C is a property of the system in which it is embedded, the requirements specification of the I and C also plays an important role in the safety assessment of the whole system. In the development of NPP digital I and C systems, it is important to be able to trace the requirements backwards to the safety analysis report and forwards to the implementation (for development and quality control). A practical problem to perform such a trace relates to large amounts of documentation that must be read to produce the requirements specification of the safety systems. An important research task is therefore to identify, develop, or improve techniques that simplify the development and use of the requirement specification. These and related concerns motivated the initiation of the TACO project, and have provided guidance to three years of Nordic collaborative research within the NKS-R programme. The present report summarises the project and its deliverables, first of all the TACO common approach to requirements handling, called the TACO Shell. The overall objective of the TACO project was to improve the knowledge on principles and best practices related to the issues concretised in the preproject. On the basis of experiences in the Nordic countries, the project aimed at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to activities involving the requirement specification. (Author)

  1. Proceedings of the July 2011 Traceability Research Summit.

    Science.gov (United States)

    Newsome, Rosetta L; Bhatt, Tejas; McEntire, Jennifer C

    2013-12-01

    At a discussion-based forum of 50 leaders in the area of food product tracing, participants recognized the need for the development of a common vision for a simple, low cost and implementable traceability approach. A key theme that emerged during the day's discussions revolved around not reinventing the wheel: there are many efforts underway, including numerous pilots, and these efforts should be collaborative. The group sought more information on current initiatives and felt that learning from the experiences of others could help form a realistic vision for the future. Although any forthcoming actions from the US FDA are unknown, industry fully expects that improvements in product tracing will be necessary, and expects that industry itself (through the "demand" side) will enact requirements that may surpass regulatory mandates. A chief concern is uniform adoption, which will require outreach to and support from the global community as well as small firms that may lack the resources and education to keep up. Ultimately, an approach that is global, economical, scalable, and inclusive of firms of all sizes who handles all types of food products, will have the greatest likelihood of success. While the ability to rapidly link products across the supply chain serves as an ideal goal, there are still substantial concerns to be addressed, particularly regarding confidentiality of data, and who will have access to what information under what circumstances, which was woven into virtually every discussion topic. Who will spearhead the development of the visions is a question, but there was general agreement that a joint partnership which includes all stakeholders is a necessity. © 2012 Institute of Food Technologists®

  2. A study on adapting advanced traceability system between feed manufacturer and salmon farmer in a farmed salmon supply chain

    OpenAIRE

    Zhang, Yating; Kim, YunJin

    2015-01-01

    Adopting an advanced traceability system in a supply chain is crucial to solve food safety issue. It is certainly important for firms to improve their traceability to deal with potential recalls but it is up to the firms’ choice 'How much traceability' they want and on 'What level of granularity'. The purpose of this thesis is to investigate how different actors in a real farmed salmon supply chain perceive benefits of implementing the advanced trac...

  3. [Traceability of labile blood products in Morocco: experience of the Ibn-Sina hospital of Rabat between 1999 and 2010].

    Science.gov (United States)

    Ouadghiri, S; Atouf, O; Brick, C; Benseffaj, N; Essakalli, M

    2012-02-01

    The blood transfusion and haemovigilance service of the Ibn-Sina hospital in Rabat (Morocco) was created 1997. This unit manages the pretransfusional tests, distribution of blood products, traceability and haemovigilance. The objective of this study was to analyze, over a period of 12years, the traceability of blood products delivered in our hospital and the measures used to improve feedback information. This is a retrospective study conducted between 1999 and 2010. Traceability rate was calculated from the feedback of traceability forms supplied with blood products (number of blood products noted on traceability forms on the total number of delivered product). To improve traceability rate, several actions were undertaken: one-time training, awareness campaigns and call phones asking for feedback information. Between 1999 and 2010, the service has delivered 173,858 blood products. The average rate of traceability during this period was 13.4 %. Traceability rate varies widely over time (5.2 % in 1999, 15.5 % in 2010) and shows a maximum value of 27.2 % in 2005. Feedback information is lower in emergency departments than in medical and surgical services. Feedback information about traceability in Ibn-Sina hospital remains very poor despite the measures used. Other actions, such as continuous education courses, low enforcement and informatisation should be considered. Copyright © 2011 Elsevier Masson SAS. All rights reserved.

  4. Establishing Food Traceability System Using Nuclear and Related Techniques in Malaysia

    International Nuclear Information System (INIS)

    Zainon Othman; Nazaratul Ashifa Abdullah Salim; Salmah Moosa; Roslanzairi Mostapha

    2015-01-01

    Determination of food traceability is important in quality control and safety of food. The dramatic increase in the volume of global trade and complexity of supply chains has caused a number of issues concerning food authenticity and safety. Commodities that attract premium prices are subject to fraud such as adulteration and counterfeit. This poses serious health risks due to unknown origin of the counterfeit. In addition to safety concern, the capability to certify food origin is becoming significant economic importance. In several countries, the use of geographical indications allows producers to obtain market recognition and often a premium price. In addressing food safety issues in Malaysia, the Food Hygiene Regulations (2009) has provision for traceability but mechanism on how traceability can be achieved is not prescribed. Present mechanism is mainly paper-based system that passes information along with the commodity. However, such system is subject to failure either inadvertently or deliberately (fraud). Thus there is a need to establish a science-based traceability system to support the food safety surveillance program in Malaysia. This paper presents the concept and use of nuclear and related techniques involving isotopic and elemental fingerprinting in determining the geographical origin of various food products and its potential application for traceability of Malaysian agricultural produce. (author)

  5. IDENTIFIKASI RISIKO RANTAI PASOK BERBASIS SISTEM TRACEABILITY PADA MINUMAN SARI APEL

    Directory of Open Access Journals (Sweden)

    Dwi Iryaning Handayani

    2013-10-01

    Full Text Available Risiko merupakan faktor-faktor yang menghambat operasional pada rantai pasok makanan yang tidak dapat dihindari akan tetapi dapat diminimalisir atau dihilangkan dengan melakukan penanganan risiko yang tepat. Penanganan risiko dalam rantai pasok sangat diperlukan agar dapat meminimalkan biaya, waktu dan kinerja dalam aktifitas rantai pasok. Traceability merupakan suatu sistem yang dapat meningkatkan transparansi dalam rantai supplai dalam mengurangi risiko klaim serta menemukan potensi risiko proses rantai pasok makanan. Oleh karena itu penelitian ini bertujuan untuk mengetahui proses yang terkait dengan traceability dan mengidentifikasi risiko yang terjadi pada rantai pasok makanan berdasarkan informasi sistem traceability. Aktivitas yang terkait dalam membangun sistem traceability antara lain pemeriksaan level stock dan produk minuman sari buah, penerimaan material dari pemasok, pembongkaran inspeksi bahan baku, penyimpanan bahan baku, penyimpanan sari buah di gudang, mengeluarkan sari buah dalam gudang untuk memulai aktivitas proses, inspeksi kualitas produk minuman sari buah, labeling produk jadi, persiapan pengiriman produk jadi, penyimpanan produk minuman sari apel di gudang, pengiriman produk ke distributor. Adapun risiko terjadi yang dapat di tangani dengan traceability yaitu, ketidak sesuaian data dengan produk dan bahan baku di gudang, kekurangan barang dan bahan baku digudang, keterlambatan penerimaan material, ketidak sesuaian barang yang dipesan, material busuk,sari buah rusak di gudang, sari buah tercampur dengan benda lain kesalahan pengangkutan produk, kesalahan dalam pengambilan galon sari buah yang tidak bersifat FIFO, kualitas produk tidak sesuai, kesalahan memberikan identitas, produk rusak digudang, produk cacat dalam perjalanan.

  6. Optimization of traceable coaxial RF reflection standards with 7-mm-N-connector using genetic algorithms

    Directory of Open Access Journals (Sweden)

    T. Schrader

    2003-01-01

    Full Text Available A new coaxial device with 7-mm-N-connector was developed providing calculable complex reflection coefficients for traceable calibration of vector network analyzers (VNA. It was specifically designed to fill the gap between 0 Hz (DC, direct current and 250MHz, though the device was tested up to 10GHz. The frequency dependent reflection coefficient of this device can be described by a model, which is characterized by traceable measurements. It is therefore regarded as a “traceable model". The new idea of using such models for traceability has been verified, found to be valid and was used for these investigations. The DC resistance value was extracted from RF measurements up to 10 GHz by means of Genetic Algorithms (GA. The GA was used to obtain the elements of the model describing the reflection coefficient Γ of a network of SMD resistors. The DC values determined with the GA from RF measurements match the traceable value at DC within 3·10-3, which is in good agreement with measurements using reference air lines at GHz frequencies.

  7. A REVIEW ON LEGAL TRACEABILITY OF GNSS MEASUREMENTS IN THE MALAYSIAN CADASTRAL PRACTICE

    Directory of Open Access Journals (Sweden)

    J. Gill

    2016-09-01

    Full Text Available As the dependency on Global Navigation Satellite System (GNSS in surveying has been growing over the years, the need for legal traceability of GNSS measurements has become a significant matter. In Malaysia, with the advent of the Malaysia Real-time Kinematic Network (MyRTKnet, GNSS surveying has revolutionised land survey and mapping. Correspondingly, the Department of Survey and Mapping Malaysia (DSMM amended and published standard regulations and guidelines concerning cadastral survey, i.e., Cadastral Survey Regulations 2009, to include GNSS measurements. However, these regulations and guidelines has not comprehensively incorporated legal traceability of GNSS measurements; which is a prerequisite for cadastral surveys as it requires reliable and conclusive evidence for issues such as boundary disputes. The first objective of this paper is to review and discuss the legal traceability of GNSS measurements. Secondly, it will highlight the current practice and issues, i.e., with regard to legal traceability, within the present Malaysian cadastral regulation and guidelines, in relation to the prevalently adopted Network RTK (N-RTK technique, GNSS instrument calibrations, and reference stations’ accuracy. Lastly, a rudimentary best practice guideline for GNSS surveying in cadastral survey for Malaysia is proposed. It is expected that this paper will contribute to the implementation of a best practice guideline, which is inclusive of legal traceability of GNSS measurements, for the Malaysian cadastral practice.

  8. Update of NIST half-life results corrected for ionization chamber source-holder instability.

    Science.gov (United States)

    Unterweger, M P; Fitzgerald, R

    2014-05-01

    As reported at the ICRM 2011, it was discovered that the source holder used for calibrations in the NIST 4πγ ionization chamber (IC) was not stable. This has affected a large number of half-life measurement results previously reported and used in compilations of nuclear data. Corrections have been made on all of the half-life data based on the assumption that the changes to the ionization chamber response were gradual. The corrections are energy dependent and therefore radionuclide specific. This presentation will review our results and present the recommended changes in half-life values and/or uncertainties. © 2013 Published by Elsevier Ltd.

  9. Advancing Smart Grid Interoperability and Implementing NIST's Interoperability Roadmap

    Energy Technology Data Exchange (ETDEWEB)

    Basso,T.; DeBlasio, R.

    2010-04-01

    The IEEE American National Standards project P2030TM addressing smart grid interoperability and the IEEE 1547 series of standards addressing distributed resources interconnection with the grid have been identified in priority action plans in the Report to NIST on the Smart Grid Interoperability Standards Roadmap. This paper presents the status of the IEEE P2030 development, the IEEE 1547 series of standards publications and drafts, and provides insight on systems integration and grid infrastructure. The P2030 and 1547 series of standards are sponsored by IEEE Standards Coordinating Committee 21.

  10. Concurso NIST. Análisis del concurso (2007-2012)

    OpenAIRE

    Martín Sierra, Marían

    2014-01-01

    El objetivo de este proyecto es dar a conocer el concurso SHA-3, concurso que ha transcurrido durante los últimos años y que ha promovido el Instituto Nacional de Estándares y Tecnología, también conocido como NIST, con el objetivo de encontrar el nuevo algoritmo criptográfico de función resumen SHA-3 que se utilizará de estándar de aquí en adelante. Con este fin se ha realizado un estudio sobre criptografía en general y sobre algunos de los algoritmos criptográficos de func...

  11. Reflective Optical Chopper Used in NIST High-Power Laser Measurements

    Directory of Open Access Journals (Sweden)

    Cromer, Chris

    2008-11-01

    Full Text Available For the past ten years, NIST has used high-reflectivity, optical choppers as beamsplitters and attenuators when calibrating the absolute responsivity and response linearity of detectors used with high-power CW lasers. The chopper-based technique has several advantages over the use of wedge-shaped transparent materials (usually crystals often used as beam splitters in this type of measurement system. We describe the design, operation and calibration of these choppers. A comparison between choppers and transparent wedge beampslitters is also discussed.

  12. Traceability and communication of requirements in digital and I and C systems development - Project report 2003

    International Nuclear Information System (INIS)

    Sivertsen, T.; Frederiksen, R.; Thunem, A.P.J.; Holmberg, J.E.; Valkonen, J.; Ventae, O.

    2004-03-01

    The overall objective of the TACO project is to improve the knowledge on principles and best practices related to the issues concretised in the preproject. On basis of experiences in the Nordic countries, the project aims at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to these activities. In the year 2003, the TACO-project concentrated on four central issues: 1) Representation of requirements origins. 2) Traceability techniques. 3) Configuration management and the traceability of requirements. 4) Identification and categorisation of system aspects and their models The work was presented at the first TACO Industrial Seminar, which took place in Stockholm on the 12th of December 2003. The seminar was hosted by SKI. (au)

  13. IMPACTS OF BOVINE TRACEABILITY IMPLANTATION IN COMPUTERIZED RURAL COMPANIES: CASE STUDIES

    Directory of Open Access Journals (Sweden)

    Henri Cócaro

    2008-02-01

    Full Text Available This study looked into evaluating the impacts that the adhesion to the bovine traceability caused in four agricultural companies that adopted or used ITs for tracked herd management. After comparing the case studies it was concluded that the adhesion to traceability caused the adoption of ITs, mainly of the management and traceability system for beef cattle and the electronic scale; the zoo technical changes that happened were, the individual identification of the animals, the control of animal stock and the possibility to determine performance and reproductive indexes; the management changes that happened were the development of new controls by filing the animal identification document (DIA, the documentation of the purchase, use and exit of inputs (nutritional and sanitarian, and the documentation of animal movements. It was not verified the return of managerial or zoo technical information by SISBOV that aided the companies in their decision-taking process.

  14. Factors influencing extent of traceability along organic fresh produce value chains

    DEFF Research Database (Denmark)

    Gichure, Josphat Njenga; Wahome, Raphael Githaiga; Njage, Patrick M.Kamau

    2017-01-01

    Information asymmetry is often a characteristic present in food value chains. However, high information asymmetry reduces trust and may compromise food safety and quality. Traceability enhances information sharing and disclosure thereby reducing the imperfection. Qualitative and quantitative data...... was collected from Kenyan certified farmers and organic outlets to generate empirical information on the extent and factors that contribute to traceability along organic kale value chains. Interviews were conducted using a semi-structured questionnaire. Data was analysed using descriptive statistics and factor.......754), certification by other quality management standards (0.711), training on food safety and traceability management (0.444) and system monitoring (0.770). Such knowledge can be used by players along the value chain to reduce information asymmetry. The results suggest need for awareness creation among stakeholders...

  15. Optimization of PIXE quantitative system to assist the traceability of pearl and other gemstones

    Energy Technology Data Exchange (ETDEWEB)

    Murao, S., E-mail: s.murao@aist.go.jp [National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, (Japan); Sera, K. [Cyclotron Research Center, Iwate Medical University, Takizawa, Iwate (Japan); Goto, S.; Takahashi, C. [Takizawa Laboratory, Japan Radioisotope Association, Takizawa, Iwate (Japan); Cartier, L. [Department of Environmental Science, University of Basel (Switzerland); Nakashima, K. [Yamagata University, Yamagata, (Japan)

    2013-07-01

    Full text: A recent rise of social attention towards ethical consumerism, ethical jewellery, blood diamonds and the traceability of gemstones has challenged scientists to construct analytical systems to deliver in line with such expectations by offering traceability solutions. It is important to develop traceability protocols for gemstones and pearls that are ethically traded, as this will further encourage members of the trade to engage in ethical and fair trade practices. Of various kinds of available methods, Proton/particle Induced X-ray Emission (PIXE) seems to be robust and promising in this context because of its trace element analysis capabilities without destruction. The authors conducted both vacuum and in-air experiments to optimize conditions to identify important peaks and to quantify the signals that correspond to gemstone materials from specific geographic origins. PIXE results for cultured pearls from Micronesia and commercial-quality crystals from Pakistan, both sources of fair trade gemstone materials, will be presented. (author)

  16. Optimization of PIXE quantitative system to assist the traceability of pearl and other gemstones

    International Nuclear Information System (INIS)

    Murao, S.; Sera, K.; Goto, S.; Takahashi, C.; Cartier, L.; Nakashima, K.

    2013-01-01

    Full text: A recent rise of social attention towards ethical consumerism, ethical jewellery, blood diamonds and the traceability of gemstones has challenged scientists to construct analytical systems to deliver in line with such expectations by offering traceability solutions. It is important to develop traceability protocols for gemstones and pearls that are ethically traded, as this will further encourage members of the trade to engage in ethical and fair trade practices. Of various kinds of available methods, Proton/particle Induced X-ray Emission (PIXE) seems to be robust and promising in this context because of its trace element analysis capabilities without destruction. The authors conducted both vacuum and in-air experiments to optimize conditions to identify important peaks and to quantify the signals that correspond to gemstone materials from specific geographic origins. PIXE results for cultured pearls from Micronesia and commercial-quality crystals from Pakistan, both sources of fair trade gemstone materials, will be presented. (author)

  17. TF4SM: A Framework for Developing Traceability Solutions in Small Manufacturing Companies

    Science.gov (United States)

    Bordel Sánchez, Borja; Alcarria, Ramón; Martín, Diego; Robles, Tomás

    2015-01-01

    Nowadays, manufacturing processes have become highly complex. Besides, more and more, governmental institutions require companies to implement systems to trace a product’s life (especially for foods, clinical materials or similar items). In this paper, we propose a new framework, based on cyber-physical systems, for developing traceability systems in small manufacturing companies (which because of their size cannot implement other commercial products). We propose a general theoretical framework, study the requirements of these companies in relation to traceability systems, propose a reference architecture based on both previous elements and build the first minimum functional prototype, to compare our solution to a traditional tag-based traceability system. Results show that our system reduces the number of inefficiencies and reaction time. PMID:26610509

  18. A false single nucleotide polymorphism generated by gene duplication compromises meat traceability.

    Science.gov (United States)

    Sanz, Arianne; Ordovás, Laura; Zaragoza, Pilar; Sanz, Albina; de Blas, Ignacio; Rodellar, Clementina

    2012-07-01

    Controlling meat traceability using SNPs is an effective method of ensuring food safety. We have analyzed several SNPs to create a panel for bovine genetic identification and traceability studies. One of these was the transversion g.329C>T (Genbank accession no. AJ496781) on the cytochrome P450 17A1 gene, which has been included in previously published panels. Using minisequencing reactions, we have tested 701 samples belonging to eight Spanish cattle breeds. Surprisingly, an excess of heterozygotes was detected, implying an extreme departure from Hardy-Weinberg equilibrium (PT SNP is a false positive polymorphism, which allows us to explain the inflated heterozygotic value. We recommend that this ambiguous SNP, as well as other polymorphisms located in this region, should not be used in identification, traceability or disease association studies. Annotation of these false SNPs should improve association studies and avoid misinterpretations. Copyright © 2012 Elsevier Ltd. All rights reserved.

  19. Seafood traceability: current needs, available tools, and biotechnological challenges for origin certification.

    Science.gov (United States)

    Leal, Miguel Costa; Pimentel, Tânia; Ricardo, Fernando; Rosa, Rui; Calado, Ricardo

    2015-06-01

    Market globalization and recurring food safety alerts have resulted in a growing consumer awareness of the need for food traceability. This is particularly relevant for seafood due to its perishable nature and importance as a key protein source for the population of the world. Here, we provide an overview of the current needs for seafood origin traceability, along with the limitations and challenges for its implementation. We focus on geochemical, biochemical, and molecular tools and how they should be optimized to be implemented globally and to address our societal needs. We suggest that seafood traceability is key to enforcing food safety regulations and fisheries control, combat fraud, and fulfill present and future expectations of conscientious producers, consumers, and authorities. Copyright © 2015 Elsevier Ltd. All rights reserved.

  20. A Systematic Mapping on Supporting Approaches for Requirements Traceability in the Context of Software Projects

    Directory of Open Access Journals (Sweden)

    MALCHER, P R.C.

    2015-12-01

    Full Text Available The Requirements Traceability is seen as a quality factor with regard to software development, being present in standards and quality models. In this context, several techniques, models, frameworks and tools have been used to support it. Thus, the purpose of this paper is to present a systematic mapping carried out in order to find in the literature approaches to support the requirements traceability in the context of software projects and make the categorization of the data found in order to demonstrate, by means of a reliable, accurate and auditable method, how this area has developed and what are the main approaches are used to implement it.

  1. Capillary electrophoresis for the analysis of contaminants in emerging food safety issues and food traceability.

    Science.gov (United States)

    Vallejo-Cordoba, Belinda; González-Córdova, Aarón F

    2010-07-01

    This review presents an overview of the applicability of CE in the analysis of chemical and biological contaminants involved in emerging food safety issues. Additionally, CE-based genetic analyzers' usefulness as a unique tool in food traceability verification systems was presented. First, analytical approaches for the determination of melamine and specific food allergens in different foods were discussed. Second, natural toxin analysis by CE was updated from the last review reported in 2008. Finally, the analysis of prion proteins associated with the "mad cow" crises and the application of CE-based genetic analyzers for meat traceability were summarized.

  2. Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K

    Science.gov (United States)

    Strouse, G. F.; Defibaugh, D. R.; Moldover, M. R.; Ripple, D. C.

    2003-09-01

    The NIST Acoustic Thermometer determines the thermodynamic temperature by measuring the speed of sound of argon in a spherical cavity. We obtained the thermodynamic temperature of three fixed points on the International Temperature Scale of 1990: the melting point of gallium [T(Ga) = 302.9146 K] and the freezing points of indium [T(In) = 429.7485 K] and tin [T(Sn) = 505.078 K]. The deviations of thermodynamic temperature from the ITS-90 defined temperatures are T - T90 = (4.7 ± 0.6) mK at T(Ga) , T - T90 = (8.8 ± 1.5) mK at T(In) , and T - T90 = (10.7 ± 3.0) mK at T(Sn) , where the uncertainties are for a coverage factor of k = 1. Our results at T(In) and T(Sn) reduce the uncertainty of T - T90 by a factor of two in this range. Both T - T90 at T(Ga) and the measured thermal expansion of the resonator between the triple point of water and T(Ga) are in excellent agreement with the 1992 determination at NIST. The dominant uncertainties in the present data come from frequency-dependent and time-dependent crosstalk between the electroacoustic transducers. We plan to reduce these uncertainties and extend this work to 800 K.

  3. Establishment of a sensor testbed at NIST for plant productivity monitoring

    Science.gov (United States)

    Allen, D. W.; Hutyra, L.; Reinmann, A.; Trlica, A.; Marrs, J.; Jones, T.; Whetstone, J. R.; Logan, B.; Reblin, J.

    2017-12-01

    Accurate assessments of biogenic carbon fluxes is challenging. Correlating optical signatures to plant activity allows for monitoring large regions. New methods, including solar-induced fluorescence (SIF), promise to provide more timely and accurate estimate of plant activity, but we are still developing a full understanding of the mechanistic leakage between plant assimilation of carbon and SIF. We have initiated a testbed to facilitate the evaluation of sensors and methods for remote monitoring of plant activity at the NIST headquarters. The test bed utilizes a forested area of mature trees in a mixed urban environment. A 1 hectare plot within the 26 hectare forest has been instrumented for ecophysiological measurements with an edge (100 m long) that is persistently monitored with multimodal optical sensors (SIF spectrometers, hyperspectral imagers, thermal infrared imaging, and lidar). This biological testbed has the advantage of direct access to the national scales maintained by NIST of measurements related to both the physical and optical measurements of interest. We offer a description of the test site, the sensors, and preliminary results from the first season of observations for ecological, physiological, and remote sensing based estimates of ecosystem productivity.

  4. Speaker diarization system on the 2007 NIST rich transcription meeting recognition evaluation

    Science.gov (United States)

    Sun, Hanwu; Nwe, Tin Lay; Koh, Eugene Chin Wei; Bin, Ma; Li, Haizhou

    2007-09-01

    This paper presents a speaker diarization system developed at the Institute for Infocomm Research (I2R) for NIST Rich Transcription 2007 (RT-07) evaluation task. We describe in details our primary approaches for the speaker diarization on the Multiple Distant Microphones (MDM) conditions in conference room scenario. Our proposed system consists of six modules: 1). Least-mean squared (NLMS) adaptive filter for the speaker direction estimate via Time Difference of Arrival (TDOA), 2). An initial speaker clustering via two-stage TDOA histogram distribution quantization approach, 3). Multiple microphone speaker data alignment via GCC-PHAT Time Delay Estimate (TDE) among all the distant microphone channel signals, 4). A speaker clustering algorithm based on GMM modeling approach, 5). Non-speech removal via speech/non-speech verification mechanism and, 6). Silence removal via "Double-Layer Windowing"(DLW) method. We achieves error rate of 31.02% on the 2006 Spring (RT-06s) MDM evaluation task and a competitive overall error rate of 15.32% for the NIST Rich Transcription 2007 (RT-07) MDM evaluation task.

  5. RFID-enabled traceability system for consignment and high value products: a case study in the healthcare sector.

    Science.gov (United States)

    Bendavid, Ygal; Boeck, Harold; Philippe, Richard

    2012-12-01

    This paper presents a case study of a hospital operating room that evaluated a Radio-Frequency Identification (RFID)-enabled traceability system for the management of consignment and high value products requiring item level traceability. Results indicate that the traceability system in conjunction with the redesign of replenishment processes facilitates item level traceability, improves financial controls and case costing, upgrades service levels and reduces inventory shrinkage. Other benefits include time saved from non-value-added activities that can be transferred to patient care activities. The solution can be considered (i) as an alternative to RFID-enabled cabinets used in the replenishment of consignment and high value supplies in certain operating rooms, cardiac catheterization laboratories and interventional radiology departments, or (ii) as a complementary solution facilitating the tracking of medical devices removed from RFID-enabled cabinets. In short, the end-to-end traceability of medical products in the healthcare supply chain can be significantly enhanced.

  6. Whole-chain traceability, is it possible to trace your hamburger to a particular steer, a U. S. perspective.

    Science.gov (United States)

    Crandall, Philip G; O'Bryan, Corliss A; Babu, Dinesh; Jarvis, Nathan; Davis, Mike L; Buser, Michael; Adam, Brian; Marcy, John; Ricke, Steven C

    2013-10-01

    Traceability through the entire food supply chain from conception to consumption is a pressing need for the food industry, consumers and government regulators. A robust, whole-chain traceability system is needed that will effectively address food quality, food safety and food defense issues by providing real-time, transparent and reliable information from beef production through slaughter and distribution to the consumer. Traceability is an expanding part of the food safety continuum that minimizes the risk of foodborne diseases, assures quality and cold-chain integrity. Traceability can be a positive competitive marketing edge for beef producers who can verify specific quality attributes such as humane production or grass fed or Certified Organic. In this review we address the benefits as well as the remaining issues for whole-chain traceability in the beef industry, with particular focus on ground beef for the markets in the United States. Copyright © 2013 Elsevier Ltd. All rights reserved.

  7. Post hoc interlaboratory comparison of single particle ICP-MS size measurements of NIST gold nanoparticle reference materials.

    Science.gov (United States)

    Montoro Bustos, Antonio R; Petersen, Elijah J; Possolo, Antonio; Winchester, Michael R

    2015-09-01

    Single particle inductively coupled plasma-mass spectrometry (spICP-MS) is an emerging technique that enables simultaneous measurement of nanoparticle size and number quantification of metal-containing nanoparticles at realistic environmental exposure concentrations. Such measurements are needed to understand the potential environmental and human health risks of nanoparticles. Before spICP-MS can be considered a mature methodology, additional work is needed to standardize this technique including an assessment of the reliability and variability of size distribution measurements and the transferability of the technique among laboratories. This paper presents the first post hoc interlaboratory comparison study of the spICP-MS technique. Measurement results provided by six expert laboratories for two National Institute of Standards and Technology (NIST) gold nanoparticle reference materials (RM 8012 and RM 8013) were employed. The general agreement in particle size between spICP-MS measurements and measurements by six reference techniques demonstrates the reliability of spICP-MS and validates its sizing capability. However, the precision of the spICP-MS measurement was better for the larger 60 nm gold nanoparticles and evaluation of spICP-MS precision indicates substantial variability among laboratories, with lower variability between operators within laboratories. Global particle number concentration and Au mass concentration recovery were quantitative for RM 8013 but significantly lower and with a greater variability for RM 8012. Statistical analysis did not suggest an optimal dwell time, because this parameter did not significantly affect either the measured mean particle size or the ability to count nanoparticles. Finally, the spICP-MS data were often best fit with several single non-Gaussian distributions or mixtures of Gaussian distributions, rather than the more frequently used normal or log-normal distributions.

  8. Metrological Traceability in the Social Sciences: A Model from Reading Measurement

    International Nuclear Information System (INIS)

    Stenner, A Jackson; Fisher, William P Jr

    2013-01-01

    The central importance of reading ability in learning makes it the natural place to start in formative and summative assessments in education. The Lexile Framework for Reading constitutes a commercial metrological traceability network linking books, test results, instructional materials, and students in elementary and secondary English and Spanish language reading education in the U.S., Canada, Mexico, and Australia

  9. Traceability and communication of requirements in digital I and C systems development. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Sivertsen, T.; Fredriksen, Rune; Thunem, A.P.J. [Inst. for Energy Technology, Halden (Norway); Holmberg, J.E.; Valkonen, J.; Ventae, O. [VTT (Finland); Andersson, J.O. [Ringhals AB (Sweden)

    2005-10-01

    The overall objective of the TACO project has been to improve the knowledge on principles and best practices related to the traceability and communication of requirements in digital I and C systems development. On the basis of experiences in the Nordic countries, the project has aimed at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to these activities. The report provides a summary of the project activities and deliverables, discusses possible application areas, and provides a link to its utilization in the project 'Management of Requirements in NPP Modernization Projects' (NKS-R-2005-47). In the preparation of the final report, a number of application areas have been identified where the TACO deliverables, first of all the TACO Shell and the TACO Traceability Model, can be utilized. The report aims at facilitating such utilization, by defining the context and main issues, explaining the main aspects of the deliverables, discussing the challenges experienced in the different application domains with respect requirements management, traceability and communication and how can the TACO results contribute to solving these challenges. (au)

  10. Authenticity and Traceability of Vanilla Flavors by Analysis of Stable Isotopes of Carbon and Hydrogen

    DEFF Research Database (Denmark)

    Hansen, Anne-Mette Sølvbjerg; Fromberg, Arvid; Frandsen, Henrik Lauritz

    2014-01-01

    Authenticity and traceability of vanilla flavors were investigated using gas chromatographyisotope ratio mass spectrometry (GC-IRMS). Vanilla flavors produced by chemical synthesis (n = 2), fermentation (n = 1), and extracted from two different species of the vanilla orchid (n = 79) were analyzed...

  11. Traceability and communication of requirements in digital I and C systems development - the TACO project

    International Nuclear Information System (INIS)

    Sivertsen, Terje; Fredriksen, Rune; Thunem, Atoosa P-J.

    2004-01-01

    This paper summarizes some of the issues studied in the TACO project, a current activity partially funded by Nordic nuclear safety research through the NKS-R programme (NKS-R project number NKS R2 002 1 6). For more details, the reader is referred to the two project reports already delivered by the project (see section 9). On basis of experiences in the Nordic countries, the TACO project aims at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to these activities. The overall aim of the preproject, which was carried out in the second half of 2002, was to identify the main issues related to traceability and communication of requirements in digital I and C systems development. By focusing on the identification of main issues, the preproject provided a basis for prioritising further work, while at the same time providing some initial recommendations related to these issues. The establishment of a Nordic expert network within the subject was another important result of the preproject. Further work has concentrated on four central and related issues, viz.; Representation of requirements origins; Traceability techniques; Configuration management and the traceability of requirements; Identification and categorisation of system aspects and their models. (Author)

  12. Traceability and communication of requirements in digital I and C systems development - Project report 2004

    Energy Technology Data Exchange (ETDEWEB)

    Sivertsen, T.; Fredrikson, R.; Thunem, A.P.J. [Institute for Energy Technology, Halden (Norway); Holmberg, J.E.; Valkonen, J.; Ventae, O. [VTT (Finland); Andersson, J.O. [Ringhals AB (Sweden)

    2005-04-01

    In 2004, the work has focused on providing a unified exposition on the issues studied and thereby facilitating a common approach to requirements handling, from their origins and through the different development phases. Emphasis has been put on the development of the TACO Traceability Model. The model supports understandability, communication and traceability by providing a common basis, in the form of a requirements change history, for different kinds of analysis and presentation of different requirements perspectives. Traceability is facilitated through the representation of requirements changes in terms of a change history tree built up by composition of instances of a number of change types, and by providing analysis on the basis of this representation. Much of the strength of the TACO Traceability Model is that it aims at forming the logic needed for formalising the activities related to change management and hence their further automation. The work was presented at the second TACO Industrial Seminar, which took place in Helsinki on the 8th of December 2004. Minutes of the seminar are included in appendix B. (au)

  13. Traceability and communication of requirements in digital I and C systems development. Final report

    International Nuclear Information System (INIS)

    Sivertsen, T.; Fredriksen, Rune; Thunem, A.P.J.; Holmberg, J.E.; Valkonen, J.; Ventae, O.; Andersson, J.O.

    2005-10-01

    The overall objective of the TACO project has been to improve the knowledge on principles and best practices related to the traceability and communication of requirements in digital I and C systems development. On the basis of experiences in the Nordic countries, the project has aimed at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to these activities. The report provides a summary of the project activities and deliverables, discusses possible application areas, and provides a link to its utilization in the project 'Management of Requirements in NPP Modernization Projects' (NKS-R-2005-47). In the preparation of the final report, a number of application areas have been identified where the TACO deliverables, first of all the TACO Shell and the TACO Traceability Model, can be utilized. The report aims at facilitating such utilization, by defining the context and main issues, explaining the main aspects of the deliverables, discussing the challenges experienced in the different application domains with respect requirements management, traceability and communication and how can the TACO results contribute to solving these challenges. (au)

  14. Application of microsatellite markers as potential tools for traceability of Girgentana goat breed dairy products.

    Science.gov (United States)

    Sardina, Maria Teresa; Tortorici, Lina; Mastrangelo, Salvatore; Di Gerlando, Rosalia; Tolone, Marco; Portolano, Baldassare

    2015-08-01

    In livestock, breed assignment may play a key role in the certification of products linked to specific breeds. Traceability of farm animals and authentication of their products can contribute to improve breed profitability and sustainability of animal productions with significant impact on the rural economy of particular geographic areas and on breed and biodiversity conservation. With the goal of developing a breed genetic traceability system for Girgentana dairy products, the aim of this study was to identify specific microsatellite markers able to discriminate among the most important Sicilian dairy goat breeds, in order to detect possible adulteration in Girgentana dairy products. A total of 20 microsatellite markers were analyzed on 338 individual samples from Girgentana, Maltese, and Derivata di Siria goat breeds. Specific microsatellite markers useful for traceability of dairy products were identified. Eight microsatellite markers showed alleles present at the same time in Maltese and Derivata di Siria and absent in Girgentana and, therefore, they were tested on DNA pools of the three breeds. Considering the electropherograms' results, only FCB20, SRCRSP5, and TGLA122 markers were tested on DNA samples extracted from cheeses of Girgentana goat breed. These three microsatellite markers could be applied in a breed genetic traceability system of Girgentana dairy products in order to detect adulteration due to Maltese and Derivata di Siria goat breeds. Copyright © 2015 Elsevier Ltd. All rights reserved.

  15. The role of food chain traceability in food risk mitigation: expert and consumer outlook

    NARCIS (Netherlands)

    Frewer, L.J.; Kher, S.V.

    2009-01-01

    The European Union has enforced mandatory traceability for food business operators for effective monitoring and management of risks associated with food and feed chains. The implementation of such a system needs to take account of stakeholder priorities and expectations. Expert stakeholders (such as

  16. Detection and traceability of genetically modified organisms in the food production chain.

    Science.gov (United States)

    Miraglia, M; Berdal, K G; Brera, C; Corbisier, P; Holst-Jensen, A; Kok, E J; Marvin, H J P; Schimmel, H; Rentsch, J; van Rie, J P P F; Zagon, J

    2004-07-01

    Both labelling and traceability of genetically modified organisms are current issues that are considered in trade and regulation. Currently, labelling of genetically modified foods containing detectable transgenic material is required by EU legislation. A proposed package of legislation would extend this labelling to foods without any traces of transgenics. These new legislations would also impose labelling and a traceability system based on documentation throughout the food and feed manufacture system. The regulatory issues of risk analysis and labelling are currently harmonised by Codex Alimentarius. The implementation and maintenance of the regulations necessitates sampling protocols and analytical methodologies that allow for accurate determination of the content of genetically modified organisms within a food and feed sample. Current methodologies for the analysis of genetically modified organisms are focused on either one of two targets, the transgenic DNA inserted- or the novel protein(s) expressed- in a genetically modified product. For most DNA-based detection methods, the polymerase chain reaction is employed. Items that need consideration in the use of DNA-based detection methods include the specificity, sensitivity, matrix effects, internal reference DNA, availability of external reference materials, hemizygosity versus homozygosity, extrachromosomal DNA, and international harmonisation. For most protein-based methods, enzyme-linked immunosorbent assays with antibodies binding the novel protein are employed. Consideration should be given to the selection of the antigen bound by the antibody, accuracy, validation, and matrix effects. Currently, validation of detection methods for analysis of genetically modified organisms is taking place. In addition, new methodologies are developed, including the use of microarrays, mass spectrometry, and surface plasmon resonance. Challenges for GMO detection include the detection of transgenic material in materials

  17. Open problems in traceability: from raw materials to finished food products

    Directory of Open Access Journals (Sweden)

    Lorenzo Comba

    2013-09-01

    Full Text Available Even though the main EU regulations concerning food traceability have already entered to force since many years, we still remark very wide and impacting product recalls, which often involve simultaneously large territories and many countries. This is a clear sign that current traceability procedures and systems, when implemented with the only aim of respecting mandatory policies, are not effective, and that there are some aspects that are at present underestimated, and therefore should be attentively reconsidered. In particular, the sole adoption of the so-called “one step back-one step forward traceability” to comply the EC Regulation 178/2002, where every actor in the chain handles merely the data coming from his supplier and those sent to his client, is in fact not sufficient to control and to limit the impact of a recall action after a risk notification. Recent studies on lots dispersion and routing demonstrate that each stakeholder has to plan his activities (production, transformation or distribution according to specific criteria that allow pre-emptively estimating and limiting the range action of a possible recall. Moreover, these new and very recently proposed techniques still present some limits; first of all the problem of traceability of bulk products (e.g. liquids, powders, grains, crystals during production phases that involve mixing operations of several lots of different/same materials. In fact, current traceability practices are in most cases unable to deal efficiently with this kind of products, and, in order to compensate the lack of knowledge about lot composition, typically resort to the adoption of very large lots, based for instance on a considered production period. Aim of this paper is to present recent advances in the design of supply chain traceability systems, discussing problems that are still open and are nowadays subject of research.

  18. An advanced liquid hydrogen cold source for the NIST research reactor

    International Nuclear Information System (INIS)

    Williams, R.E.; Kopetka, P.; Rowe, J.M.

    1999-01-01

    A second-generation liquid hydrogen cold neutron source is currently being fabricated and will be installed in the NIST reactor early next year. The existing source has operated very successfully over the last four years, providing a six-fold increase in the cold neutron yield compared to the previous heavy ice source. The design of the new source is based on our operating experience with the existing LH 2 source and extensive neutron transport calculations using improved MCNP modeling and computational capabilities. Enhanced mechanical design and manufacturing tools are exploited in the fabrication of the advanced source, which is expected to nearly double the yield of the existing LH 2 source. (author)

  19. Preparation and LSC standardization of ''89 Sr (DNP) using the CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Arcos Merino, J.M. Los; Grau Malonda, A.

    1994-01-01

    A procedure for preparation of liquid scintillation counting samples of the strontium DNP complex, labelled with ''89 Sr, is described. The chemical quench, the counting stability and spectral evolution of this compound is studied in six scintillators, Toluene, Toluene-alcohol, Dioxane-naphthalene, HiSafe II, Ultima-Gold and Instagel. The liquid scintillation standardization of ''89Sr-DNP by the CIEMAT/NIST method, using Hisafe II and Ultima-Gold scintillators, has been carried out. The discrepancies between experimental and computed efficiencies are lower than 0.38% and 0.48%, respectively. The solution has been standardized in terms of activity concentration to an overall uncertainty of 0.38%. (Author)

  20. Cold neutron prompt gamma activation analysis at NIST; A progress report

    Energy Technology Data Exchange (ETDEWEB)

    Paul, R L; Lindstrom, R M [National Inst. of Standards and Technology, Gaithersburg, MD (United States). Div. of Inorganic Analytical Research; Vincent, D H [Michigan Univ., Ann Arbor, MI (United States). Dept. of Nuclear Engineering

    1994-05-01

    An instrument for prompt gamma-ray activation analysis is now in operation at the NIST Cold Neutron Research Facility (CNRF). The cold neutron beam is relatively free of contamination by fast neutrons and reactor gamma rays, and the neutron fluence rate is 1.5 x 10 [sup 8] cm [sup -2] x s [sup -1] (thermal equivalent). As a result of a compact target-detector geometry the sensitivity is better by a factor of as much as seven than that obtained with an existing thermal instrument, and hydrogen background is a factor of 50 lower. This instrument was applied to multielement analysis of the Allende meteorite and other materials. (author) 14 refs.; 2 figs.; 1 tab.

  1. Preparation and LSC Standardization of ''89Sr (DNP) Using the CIEMAT/NIST Method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Los Arcos Merino, J. M.; Grau Malonda, A.

    1994-01-01

    A procedure for preparation of liquid scintillation counting samples of the strontium DNP complex, labelled with ''89Sr, is described, the chemical quench, the counting stability and spectral evolution of this compound is studied in six scintillators, Toluene, Toluene-alcohol, Dioxane-naphthalene, HiSafe II, Ultima- Gold and Instagel. The liquid scintillation standardization of 89Sr-DNP by the CIEMAT/NIST method, using HiSafe II and Ultima-Gold scintillators, has been carried out. The discrepancies between experimental and computed efficiencies are lower than 0.38% and 0.48%, respectively. The solution has been standardized in terms of activity concentration to an overall uncertainty of 0,38%. (Author) 10 refs

  2. IUPAC-NIST Solubility Data Series. 95. Alkaline Earth Carbonates in Aqueous Systems. Part 2. Ca

    Science.gov (United States)

    Vanderdeelen, Jan

    2012-06-01

    The alkaline earth carbonates are an important class of minerals. This article is part of a volume in the IUPAC-NIST Solubility Data Series that compiles and critically evaluates solubility data of the alkaline earth carbonates in water and in simple aqueous electrolyte solutions. Part 1 outlined the procedure adopted in this volume, and presented the beryllium and magnesium carbonates. Part 2, the current paper, compiles and critically evaluates the solubility data of calcium carbonate. The chemical forms included are the anhydrous CaCO3 types calcite, aragonite, and vaterite, the monohydrate monohydrocalcite (CaCO3. H2O), the hexahydrate ikaite (CaCO3.6H2O), and an amorphous form. The data were analyzed with two model variants, and thermodynamic data of each form consistent with each of the models and with the CODATA key values for thermodynamics are presented.

  3. IUPAC-NIST Solubility Data Series. 95. Alkaline Earth Carbonates in Aqueous Systems. Part 2. Ca

    International Nuclear Information System (INIS)

    De Visscher, Alex; Vanderdeelen, Jan

    2012-01-01

    The alkaline earth carbonates are an important class of minerals. This article is part of a volume in the IUPAC-NIST Solubility Data Series that compiles and critically evaluates solubility data of the alkaline earth carbonates in water and in simple aqueous electrolyte solutions. Part 1 outlined the procedure adopted in this volume, and presented the beryllium and magnesium carbonates. Part 2, the current paper, compiles and critically evaluates the solubility data of calcium carbonate. The chemical forms included are the anhydrous CaCO 3 types calcite, aragonite, and vaterite, the monohydrate monohydrocalcite (CaCO 3 · H 2 O), the hexahydrate ikaite (CaCO 3 ·6H 2 O), and an amorphous form. The data were analyzed with two model variants, and thermodynamic data of each form consistent with each of the models and with the CODATA key values for thermodynamics are presented.

  4. IUPAC-NIST Solubility Data Series. 95. Alkaline Earth Carbonates in Aqueous Systems. Part 2. Ca

    Energy Technology Data Exchange (ETDEWEB)

    De Visscher, Alex; Vanderdeelen, Jan [Department of Chemical and Petroleum Engineering, and Centre for Environmental Engineering Research and Education (CEERE), Schulich School of Engineering, University of Calgary, Calgary, Alberta, T2N 1N4 (Canada); Department of Applied Analytical and Physical Chemistry, Faculty of Bioscience Engineering, Ghent University, B-9000 Ghent (Belgium)

    2012-06-15

    The alkaline earth carbonates are an important class of minerals. This article is part of a volume in the IUPAC-NIST Solubility Data Series that compiles and critically evaluates solubility data of the alkaline earth carbonates in water and in simple aqueous electrolyte solutions. Part 1 outlined the procedure adopted in this volume, and presented the beryllium and magnesium carbonates. Part 2, the current paper, compiles and critically evaluates the solubility data of calcium carbonate. The chemical forms included are the anhydrous CaCO{sub 3} types calcite, aragonite, and vaterite, the monohydrate monohydrocalcite (CaCO{sub 3}{center_dot} H{sub 2}O), the hexahydrate ikaite (CaCO{sub 3}{center_dot}6H{sub 2}O), and an amorphous form. The data were analyzed with two model variants, and thermodynamic data of each form consistent with each of the models and with the CODATA key values for thermodynamics are presented.

  5. Homogeneity and evaluation of the new NIST leaf certified reference materials

    International Nuclear Information System (INIS)

    Becker, D.A.

    1990-01-01

    The NIST has produced and is in the process of certifying two new leaf CRMs, SRM1515 Apple Leaves and SRM 1547 Peach Leaves, as replacements for the no longer available NBS Orchard Leaves and the almost depleted Citrus Leaves. These two new materials have been processed and are being thoroughly evaluated and should provide the most advanced natural matrix botanical trace-element reference materials available. Caution should be used in determining a basis weight (drying) for these CRMs because of their very fine particle size. Homogeneity has been established by instrumental neutron activation analysis on both leaf materials for five elements, to date, to better than 1.5% (1 s) for 100-mg sample sizes

  6. Metrological traceability and harmonization of medical tests: a quantum leap forward is needed to keep pace with globalization and stringent IVD-regulations in the 21st century!

    Science.gov (United States)

    Cobbaert, Christa; Smit, Nico; Gillery, Philippe

    2018-05-07

    In our efforts to advance the profession and practice of clinical laboratory medicine, strong coordination and collaboration are needed more than ever before. At the dawn of the 21st century, medical laboratories are facing many unmet clinical needs, a technological revolution promising a plethora of better biomarkers, financial constraints, a growing scarcity of well-trained laboratory technicians and a sharply increasing number of International Organization for Standardization guidelines and new regulations to which medical laboratories should comply in order to guarantee safety and effectiveness of medical test results. Although this is a global trend, medical laboratories across continents and countries are in distinct phases and experience various situations. A universal underlying requirement for safe and global use of medical test results is the standardization and harmonization of test results. Since two decades and after a number of endeavors on standardization/harmonization of medical tests, it is time to reflect on the effectiveness of the approaches used. To keep laboratory medicine sustainable, viable and affordable, clarification of the promises of metrological traceability of test results for improving sick and health care, realization of formal commitment among all stakeholders of the metrological traceability chain and preparation of a joint and global plan for action are essential prerequisites. Policy makers and regulators should not only overwhelm the diagnostic sector with oversight and regulations but should also create the conditions by establishing a global professional forum for anchoring the metrological traceability concept in the medical test domain. Even so, professional societies should have a strong voice in their (inter-) national governments to negotiate long-lasting public policy commitment and funds for global standardization of medical tests.

  7. Recent applications of nuclear analytical methods to the certification of elemental content in NIST standard reference materials

    International Nuclear Information System (INIS)

    Greenberg, R.R.; Zeisler, R.; Mackey, E.A.

    2006-01-01

    Well-characterized, certified reference materials (CRMs) play an essential role in assuring the quality of analytical measurements. NIST has been producing CRMs, currently called NIST Standard Reference Materials (SRMs), to validate analytical measurements for nearly one hundred years. The predominant mode of certifying inorganic constituents in complex-matrix SRMs is through the use of two critically evaluated, independent analytical techniques at NIST. These techniques should have no significant sources of error in common. The use of nuclear analytical methods in combination with one of the chemically based analytical method at NIST eliminates the possibility of any significant, common error source. The inherent characteristics of the various forms of nuclear analytical methods make them extremely valuable for SRM certification. Instrumental NAA is nondestructive, which eliminates the possibility of any dissolution problems, and often provides homogeneity information. Radiochemical NAA typically provides nearly blank-free determinations of some highly important, but difficult elements at very low levels. Prompt-gamma NAA complements INAA, and provides independent determinations of some key elements. In addition, all significant uncertainty components can be evaluated for these techniques, and we believe these methods can meet all the requirements of a primary method of measurement as defined by ISO and the CCQM. NIST has certified several SRMs using INAA and RNAA as primary methods. In addition, NIST has compared measurements by INAA and PGAA with other primary methods as part of the CCQM intercomparisons of national metrology institutes. Some significant SRMs recently certified for inorganic constituents with contributions from the nuclear analytical methods include: Toxic Substances in Urine (SRM 2670a), Lake Superior Fish Tissue (SRM 1946), Air Particulate on Filter Media (SRM 2783), Inorganics in Marine Sediment (SRM 2702), Sediment for Solid Sampling (Small

  8. [Techniques and possibilities of traceability of food: genotyping of the domestic animal population as an innovative contribution to food safety].

    Science.gov (United States)

    Brem, G

    2004-07-01

    Traceability of meat has become a very important aspect of quality assurance of food. DNA analyses could be used for identification and verification of farm animals and animal derived products. A prerequisite is the collection of qualified samples from entire populations of production animals or from regionally or specially characterised animal populations. The expenditure for conventional carrying out collection, preservation, cataloguing, and storage would be enormous. Therefore we have developed a simple, reliable, and inexpensive method for the collection using the ear tagging process and for preservation of samples at room temperature. A similar collection technology can also be used for sampling of carcasses, meat and meat products. Isolation of DNA from these tissue samples can be preformed using a new single step technology. For identifying individuals microsatellites and single nucleotide polymorphisms are analysed. Comparison of DNA fingerprints or SNP signatures allows to traceback samples collected from products to the animals they are coming from. If the system will be established on a nationwide basis the total costs would be less than 0.05 EUR per kilogram meat sold.

  9. Quality assurance programs at the PNL calibrations laboratory

    International Nuclear Information System (INIS)

    Piper, R.K.; McDonald, J.C.; Fox, R.A.; Eichner, F.N.

    1993-03-01

    The calibrations laboratory at Pacific Northwest Laboratory (PNL) serves as a radiological standardization facility for personnel and environmental dosimetry and radiological survey instruments. As part of this function, the calibrations laboratory must maintain radiological reference fields with calibrations traceable to the National Institute of Standards and Technology (NIST). This task is accomplished by a combination of (1) sources or reference instruments calibrated at or by NIST, (2) measurement quality assurance (MQA) interactions with NIST, and (3) rigorous internal annual and quarterly calibration verifications. This paper describes a representative sample of the facilities, sources, and actions used to maintain accurate and traceable fields

  10. Desenvolvimento de um sistema de rastreabilidade aplicado à cadeia de produção do vinho Development of a traceability system applied to the wine production chain

    Directory of Open Access Journals (Sweden)

    Luís Fernando de Abreu Porto

    2007-10-01

    Full Text Available Com o presente trabalho visou-se desenvolver um sistema de rastreabilidade aplicado à cadeia de produção do vinho. Foram utilizados a tecnologia de desenvolvimento JSP (Java Server Pages; o banco de dados MySQL; bem como o Tomcat, para servidor de JSP. O sistema para rastreabilidade do vinho desenvolvido é útil tanto para os produtores quanto para os consumidores por ser um indicador de segurança alimentar, visto que com ele é possível se rastrear a história da garrafa de um vinho desde o plantio da uva até o momento de seu consumo.The present work aimed to develop a traceability system applied to the wine production chain. The JSP development technology (Java Server Pages, the MySQL data base, as well as the Tomcat for JSP server, have been used. The developed system for wine traceability is useful for the producers as well as for the consumers for being an indicator of food safety, since with it, it is possible to track the history of the bottle of a wine from the plantation of the grape to the moment of its consumption.

  11. Certified Reference Material for Use in 1H, 31P, and 19F Quantitative NMR, Ensuring Traceability to the International System of Units.

    Science.gov (United States)

    Rigger, Romana; Rück, Alexander; Hellriegel, Christine; Sauermoser, Robert; Morf, Fabienne; Breitruck, KathrinBreitruck; Obkircher, Markus

    2017-09-01

    In recent years, quantitative NMR (qNMR) spectroscopy has become one of the most important tools for content determination of organic substances and quantitative evaluation of impurities. Using Certified Reference Materials (CRMs) as internal or external standards, the extensively used qNMR method can be applied for purity determination, including unbroken traceability to the International System of Units (SI). The implementation of qNMR toward new application fields, e.g., metabolomics, environmental analysis, and physiological pathway studies, brings along more complex molecules and systems, thus making use of 1H qNMR challenging. A smart workaround is possible by the use of other NMR active nuclei, namely 31P and 19F. This article presents the development of three classes of qNMR CRMs based on different NMR active nuclei (1H, 31P, and 19F), and the corresponding approaches to establish traceability to the SI through primary CRMs from the National Institute of Standards and Technology and the National Metrology Institute of Japan. These TraceCERT® qNMR CRMs are produced under ISO/IEC 17025 and ISO Guide 34 using high-performance qNMR.

  12. Traceable size determination of nanoparticles, a comparison among European metrology institutes

    International Nuclear Information System (INIS)

    Meli, Felix; Klein, Tobias; Buhr, Egbert; Frase, Carl Georg; Gleber, Gudrun; Krumrey, Michael; Duta, Alexandru; Duta, Steluta; Korpelainen, Virpi; Bellotti, Roberto; Picotto, Gian Bartolo; Boyd, Robert D; Cuenat, Alexandre

    2012-01-01

    Within the European iMERA-Plus project ‘Traceable Characterisation of Nanoparticles’ various particle measurement procedures were developed and finally a measurement comparison for particle size was carried out among seven laboratories across six national metrology institutes. Seven high quality particle samples made from three different materials and having nominal sizes in the range from 10 to 200 nm were used. The participants applied five fundamentally different measurement methods, atomic force microscopy, dynamic light scattering (DLS), small-angle x-ray scattering, scanning electron microscopy and scanning electron microscopy in transmission mode, and provided a total of 48 independent, traceable results. The comparison reference values were determined as weighted means based on the estimated measurement uncertainties of the participants. The comparison reference values have combined standard uncertainties smaller than 1.4 nm for particles with sizes up to 100 nm. All methods, except DLS, provided consistent results. (paper)

  13. An intelligent traceability system: Efficient tool for a supply chain sustainability

    Science.gov (United States)

    Bougdira, Abdesselam; Ahaitouf, Abdelaziz; Akharraz, Ismail

    2016-07-01

    The supply chain sustainability becomes a necessity for a smooth, a rapid and a fluid economic transaction. To reach a sustainable supply chain, we propose to focus attention on products and their lifecycle. So, we consider the traceability as a major success key to ensure the supply chain sustainability. For that, we consider a supply chain design that use an intelligent products traced by an intelligent traceability system. This system identifies, restores history and properties of a product, besides it tracks, in real-time a product. This solution can, also, bring, in the product environment, appropriate adjustments to prevent any risk of threatening qualities for the product. So, it helps supply chain contributors making the sustainable adjustments and the instant benchmark of the supply chain sustainability.

  14. Services of the CDRH X-ray calibration laboratory and their traceability to National Standards

    Energy Technology Data Exchange (ETDEWEB)

    Cerra, F.; Heaton, H.T. [Center for Devices and Radiological Health, Rockville, MD (United States)

    1993-12-31

    The X-ray Calibration Laboratory (XCL) of the Center for Devices and Radiological Health (CDRH) provides calibration services for the Food and Drug Administration (FDA). The instruments calibrated are used by FDA and contract state inspectors to verify compliance with federal x-ray performance standards and for national surveys of x-ray trends. In order to provide traceability of measurements, the CDRH XCL is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) for reference, diagnostic, and x-ray survey instrument calibrations. In addition to these accredited services, the CDRH XCL also calibrates non-invasive kVp meters in single- and three-phase x-ray beams, and thermoluminescent dosimeter (TLD) chips used to measure CT beam profiles. The poster illustrates these services and shows the traceability links back to the National Standards.

  15. Transgene traceability in transgenic mice: a bioanalytical approach for potential gene-doping analysis.

    Science.gov (United States)

    Bogani, Patrizia; Spiriti, Maria Michela; Lazzarano, Stefano; Arcangeli, Annarosa; Buiatti, Marcello; Minunni, Maria

    2011-11-01

    The World Anti-Doping Agency fears the use of gene doping to enhance athletic performances. Thus, a bioanalytical approach based on end point PCR for detecting markers' of transgenesis traceability was developed. A few sequences from two different vectors using an animal model were selected and traced in different tissues and at different times. In particular, enhanced green fluorescent protein gene and a construct-specific new marker were targeted in the analysis. To make the developed detection approach open to future routine doping analysis, matrices such as urine and tears as well blood were also tested. This study will have impact in evaluating the vector transgenes traceability for the detection of a gene doping event by non-invasive sampling.

  16. parameters affecting the calibration uniformity and traceability of gamma measuring devices

    International Nuclear Information System (INIS)

    Youssef, S.K.; Henaish, B.A.

    1985-01-01

    One of the problems which usually defeats the dosimetric evaluations performed by the health and safety experts is the absence of the reproducibility and accuracy of the used measuring devices systems. Furthermore, the traceability of the dose evaluation done by the users themselves are not achieved. Also the uniformity and homogeneity between the various users dosimeters and that available at specified central organization are not maintained. The present manuscript is scoping to deal with such various problems such as: a) dosimeter accuracy, b) traceability of the various users dosimeters and measuring devices. This paper also suggests a programme for the minimum facilities which are required for operating a central calibration laboratory. the responsibility of that central calibration lab., beside the linking chain between the different users and that calibration lab. are stated and discussed in detail. Furthermore, the authors experiences gained in operating the secondary standards calibration laboratory are also reviewed. 2 fig

  17. Meeting the measurement uncertainty and traceability requirements of ISO/AEC standard 17025 in chemical analysis.

    Science.gov (United States)

    King, B

    2001-11-01

    The new laboratory accreditation standard, ISO/IEC 17025, reflects current thinking on good measurement practice by requiring more explicit and more demanding attention to a number of activities. These include client interactions, method validation, traceability, and measurement uncertainty. Since the publication of the standard in 1999 there has been extensive debate about its interpretation. It is the author's view that if good quality practices are already in place and if the new requirements are introduced in a manner that is fit for purpose, the additional work required to comply with the new requirements can be expected to be modest. The paper argues that the rigour required in addressing the issues should be driven by customer requirements and the factors that need to be considered in this regard are discussed. The issues addressed include the benefits, interim arrangements, specifying the analytical requirement, establishing traceability, evaluating the uncertainty and reporting the information.

  18. Decision Model for Planning and Scheduling of Seafood Product Considering Traceability

    Science.gov (United States)

    Agustin; Mawengkang, Herman; Mathelinea, Devy

    2018-01-01

    Due to the global challenges, it is necessary for an industrial company to integrate production scheduling and distribution planning, in order to be more efficient and to get more economics advantages. This paper presents seafood production planning and scheduling of a seafood manufacture company which produces simultaneously multi kind of seafood products, located at Aceh Province, Indonesia. The perishability nature of fish highly restricts its storage duration and delivery conditions. Traceability is a tracking requirement to check whether the quality of the product is satisfied. The production and distribution planning problem aims to meet customer demand subject to traceability of the seafood product and other restrictions. The problem is modeled as a mixed integer linear program, and then it is solved using neighborhood search approach.

  19. Microfluidic-assisted fabrication of flexible and location traceable organo-motor.

    Science.gov (United States)

    Seo, Kyoung Duck; Kwak, Byung Kook; Sanchez, Samuel; Kim, Dong Sung

    2015-04-01

    In this paper, we fabricate a flexible and location traceable micromotor, called organo-motor, assisted by microfluidic devices and with high throughput. The organo-motors are composed of organic hydrogel material, poly (ethylene glycol) diacrylate (PEGDA), which can provide the flexibility of their structure. For spatial and temporal traceability of the organo-motors under magnetic resonance imaging (MRI), superparamagnetic iron oxide nanoparticles (SPION; Fe3O4) were incorporated into the PEGDA microhydrogels. Furthermore, a thin layer of platinum (Pt) was deposited onto one side of the SPION-PEGDA microhydrogels providing geometrical asymmetry and catalytic propulsion in aqueous fluids containing hydrogen peroxide solution, H2O2. Furthermore, the motion of the organo-motor was controlled by a small external magnet enabled by the presence of SPION in the motor architecture.

  20. Services of the CDRH X-ray calibration laboratory and their traceability to National Standards

    International Nuclear Information System (INIS)

    Cerra, F.; Heaton, H.T.

    1993-01-01

    The X-ray Calibration Laboratory (XCL) of the Center for Devices and Radiological Health (CDRH) provides calibration services for the Food and Drug Administration (FDA). The instruments calibrated are used by FDA and contract state inspectors to verify compliance with federal x-ray performance standards and for national surveys of x-ray trends. In order to provide traceability of measurements, the CDRH XCL is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) for reference, diagnostic, and x-ray survey instrument calibrations. In addition to these accredited services, the CDRH XCL also calibrates non-invasive kVp meters in single- and three-phase x-ray beams, and thermoluminescent dosimeter (TLD) chips used to measure CT beam profiles. The poster illustrates these services and shows the traceability links back to the National Standards

  1. Geotraceability: an innovative concept to enhance conventional traceability in the agri-food chain

    Directory of Open Access Journals (Sweden)

    Oger, R.

    2010-01-01

    Full Text Available With the globalization of trade, people have become enlightened and demanding consumers as regards the origin of their food and the environment in which it is produced. The concept of geotraceability described in this article responds to that requirement by combining geographical information with conventional traceability data. The inclusion of geographical information relating to the environment of the production plots is based not only on exploiting some functionalities of spatial analysis tools that exist in geographical information systems (GIS but also on developing specific tools such as a geoidentifier and geoindicators. This article also describes the characteristics and methods of implementing a geographical information management system linked with traceability information. Lastly, the potential for using geotraceability systems in supply chains is analyzed, in particular for consumer warnings in cases of food crisis and assistance for certification of differentiated quality agricultural products.

  2. A new simplex chemometric approach to identify olive oil blends with potentially high traceability.

    Science.gov (United States)

    Semmar, N; Laroussi-Mezghani, S; Grati-Kamoun, N; Hammami, M; Artaud, J

    2016-10-01

    Olive oil blends (OOBs) are complex matrices combining different cultivars at variable proportions. Although qualitative determinations of OOBs have been subjected to several chemometric works, quantitative evaluations of their contents remain poorly developed because of traceability difficulties concerning co-occurring cultivars. Around this question, we recently published an original simplex approach helping to develop predictive models of the proportions of co-occurring cultivars from chemical profiles of resulting blends (Semmar & Artaud, 2015). Beyond predictive model construction and validation, this paper presents an extension based on prediction errors' analysis to statistically define the blends with the highest predictability among all the possible ones that can be made by mixing cultivars at different proportions. This provides an interesting way to identify a priori labeled commercial products with potentially high traceability taking into account the natural chemical variability of different constitutive cultivars. Copyright © 2016 Elsevier Ltd. All rights reserved.

  3. Simulation evaluation of NIST air-kerma rate calibration standard for electronic brachytherapy.

    Science.gov (United States)

    Hiatt, Jessica R; Rivard, Mark J; Hughes, H Grady

    2016-03-01

    Dosimetry for the model S700 50 kV electronic brachytherapy (eBT) source (Xoft, Inc., a subsidiary of iCAD, San Jose, CA) was simulated using Monte Carlo (MC) methods by Rivard et al. ["Calculated and measured brachytherapy dosimetry parameters in water for the Xoft Axxent x-ray source: An electronic brachytherapy source," Med. Phys. 33, 4020-4032 (2006)] and recently by Hiatt et al. ["A revised dosimetric characterization of the model S700 electronic brachytherapy source containing an anode-centering plastic insert and other components not included in the 2006 model," Med. Phys. 42, 2764-2776 (2015)] with improved geometric characterization. While these studies examined the dose distribution in water, there have not previously been reports of the eBT source calibration methods beyond that recently reported by Seltzer et al. ["New national air-kerma standard for low-energy electronic brachytherapy sources," J. Res. Natl. Inst. Stand. Technol. 119, 554-574 (2014)]. Therefore, the motivation for the current study was to provide an independent determination of air-kerma rate at 50 cm in air K̇air(d=50 cm) using MC methods for the model S700 eBT source. Using CAD information provided by the vendor and disassembled sources, an MC model was created for the S700 eBT source. Simulations were run using the mcnp6 radiation transport code for the NIST Lamperti air ionization chamber according to specifications by Boutillon et al. ["Comparison of exposure standards in the 10-50 kV x-ray region," Metrologia 5, 1-11 (1969)], in air without the Lamperti chamber, and in vacuum without the Lamperti chamber. K̇air(d=50 cm) was determined using the *F4 tally with NIST values for the mass energy-absorption coefficients for air. Photon spectra were evaluated over 2 π azimuthal sampling for polar angles of 0° ≤ θ ≤ 180° every 1°. Volume averaging was averted through tight radial binning. Photon energy spectra were determined over all polar angles in both air and vacuum using

  4. Practice and experience in traceability of radioactivity measurements of environmental samples

    International Nuclear Information System (INIS)

    Huang Zhijian

    1990-01-01

    This paper discusses some aspects on radioactivity measurement traceability and summarizes the work on quality assurance of radioactivity measurements of environmental samples in the laboratory, including transfer of standards, preparation of reference materials, and calibration of efficiency for volumse surces with Ge(Li) spectrometer. Some practical activitis regarding intercomparison of radioactivity measurements and other traceabillity-related activities are also described. Some sugestions relating to performing quality assurance are made

  5. Study of mechanism improving target course traceability in G-Vectoring Control

    Science.gov (United States)

    Yamakado, Makoto; Abe, Masato; Kano, Yoshio; Umetsu, Daisuke; Yoshioka, Thoru

    2018-05-01

    Production-type G-Vectoring Control vehicles are now being put on the market. Customers and reviewers have praised the handling quality and course traceability of these vehicles. This paper clarifies the mechanism behind this improvement in handling quality using a simple bicycle model and driver model analysis. It focuses on the residual yaw angular acceleration when the steering speed is zero and shows that GVC reduces its value. This result provides evidence for improved handling quality in GVC vehicles.

  6. Evaluation of surface contamination based on certifiably traceable, internationally accreditable measurements

    International Nuclear Information System (INIS)

    Whitlock, G.D.

    1992-01-01

    National Accreditation and Measurement Service (NAMAS) adopted by the EUROMET agreement requires that the calibration of monitoring instruments be traceable internationally with the objective that radiation hazard assessment be improved. This objective is achieved for Tritium surface contamination by employing calibration sources and evaluation methods which comply with ISO standards including the measurement of activity removable by Volatilization as well as dust. Consideration should be given to organic binding of tritium in the skin with its implications in the event of litigation. (author)

  7. Traceability in food supply chains Exploring governmental authority and industrial effects

    OpenAIRE

    Ringsberg, Henrik

    2011-01-01

    Traceability in food supply chains has received increased attention in the last decade. The efforts of governmental authorities have also increased to regulate and control food supply chains and product characteristics related to information to ensure safety, quality, and preservation of living resources. Previous studies in the area take an industrial focus and exclude the governmental authority focus. This thesis thus focuses on exploring governmental authority and industrial effects on tra...

  8. TRACEABILITY OF ON COORDINATE MEASURING MACHINES – CALIBRATION AND PERFORMANCE VERIFICATION

    DEFF Research Database (Denmark)

    De Chiffre, Leonardo; Savio, Enrico; Bariani, Paolo

    This document is used in connection with three exercises each of 45 minutes duration as a part of the course GEOMETRICAL METROLOGY AND MACHINE TESTING. The exercises concern three aspects of coordinate measurement traceability: 1) Performance verification of a CMM using a ball bar; 2) Calibration...... of an optical coordinate measuring machine; 3) Uncertainty assessment using the ISO 15530-3 “Calibrated workpieces” procedure....

  9. Nomenclature and traceability debate for biosimilars: small-molecule surrogates lend support for distinguishable nonproprietary names.

    Science.gov (United States)

    Chao, Jingdong; Skup, Martha; Alexander, Emily; Tundia, Namita; Macaulay, Dendy; Wu, Eric; Mulani, Parvez

    2015-03-01

    The purpose of the present study was to investigate the traceability of adverse events (AEs) for branded and generic drugs with identical nonproprietary names and to consider potential implications for the traceability of AEs for branded and biosimilar biologics. Adverse event reports in the Food and Drug Administration AE Reporting System (FAERS) were compared with those in a commercial insurance claims database (Truven Health MarketScan(®)) for 2 drugs (levetiracetam and enoxaparin sodium) with manufacturing or prescribing considerations potentially analogous to those of some biosimilars. Monthly rates of branded- and generic-attributed AEs were estimated pre- and post-generic entry. Post-entry branded-to-generic AE relative rate ratios were calculated. In FAERS, monthly AE rate ratios during the post-generic period showed a pattern in which AE rates for the branded products were greater than for the generic products. Differences in rates of brand- and generic-attributed AEs were statistically significant for both study drugs; the AE rate for the branded products peaked at approximately 10 times that of the generic levetiracetam products and approximately 4 times that of the generic enoxaparin sodium products. In contrast, monthly ratios for the MarketScan data were relatively constant over time. Use of the same nonproprietary name for generic and branded products may contribute to poor traceability of AEs reported in the FAERS database due to the significant misattribution of AEs to branded products (when those AEs were in fact associated with patient use of generic products). To ensure accurate and robust safety surveillance and traceability for biosimilar products in the United States, improved product identification mechanisms, such as related but distinguishable nonproprietary names for biosimilars and reference biologics, should be considered.

  10. Ensuring the Visibility and Traceability of Items through Logistics Chain of Automotive Industry Based on AutoEPCNet Using

    OpenAIRE

    Pavel Stasa; Filip Benes; Jiri Svub; Yong-Shin Kang; Jakub Unucka; Lukas Vojtech; Vladimir Kebo; Jongtae Rhee

    2016-01-01

    Traceability in logistics is the capability of the participants to trace the products throughout the supply chain by means of either the product and/or container identifiers in a forward and/or backward direction. In today's competitive economic environment, traceability is a key concept related to all products and all types of supply chains. The goal of this paper is to describe development of application that enables to create and share information about the physical movement and status of ...

  11. Implementing Traceability Systems in Specific Supply Chain Management (SCM through Critical Success Factors (CSFs

    Directory of Open Access Journals (Sweden)

    Shahbaz Khan

    2018-01-01

    Full Text Available Traceability plays a vital role in the success of Halal Supply Chain (HSC. HSC revolve around the essential dimension of Halal Integrity (HI, whereas traceability is seemed to be medium to assure integrity. Thus, a need is felt to identify the factors which are critical to the successful implementation of traceability in Halal Supply Chain Management (HSCM. Identified Twelve Critical Success Factors (CSFs through an extensive review of literature and opinion of experts. Further, a contextual relationship among the CSFs is developed using Total Interpretive Structure Modelling (TISM approach and derived a model. The structural model is analyzed using Fuzzy MICMAC (Matrice d’Impacts Croises-Multipication Applique and Classment-cross-impact matrix multiplication applied to classification approach to identify the importance of CSFs by driving and dependence power. The primary result indicates towards; that improving the HSCM with the higher level of Halal awareness. Assuring HI will enhance the consumer satisfaction which leads to a competitive advantage for the organization. Academic researchers, industrial practitioners and Supply Chain executives can understand the complex interrelationship of CSFs by visualizing the TISM. It can help the management, lobbies and government to develop the policies regarding the implementation.

  12. Thermodynamic Temperature of High-Temperature Fixed Points Traceable to Blackbody Radiation and Synchrotron Radiation

    Science.gov (United States)

    Wähmer, M.; Anhalt, K.; Hollandt, J.; Klein, R.; Taubert, R. D.; Thornagel, R.; Ulm, G.; Gavrilov, V.; Grigoryeva, I.; Khlevnoy, B.; Sapritsky, V.

    2017-10-01

    Absolute spectral radiometry is currently the only established primary thermometric method for the temperature range above 1300 K. Up to now, the ongoing improvements of high-temperature fixed points and their formal implementation into an improved temperature scale with the mise en pratique for the definition of the kelvin, rely solely on single-wavelength absolute radiometry traceable to the cryogenic radiometer. Two alternative primary thermometric methods, yielding comparable or possibly even smaller uncertainties, have been proposed in the literature. They use ratios of irradiances to determine the thermodynamic temperature traceable to blackbody radiation and synchrotron radiation. At PTB, a project has been established in cooperation with VNIIOFI to use, for the first time, all three methods simultaneously for the determination of the phase transition temperatures of high-temperature fixed points. For this, a dedicated four-wavelengths ratio filter radiometer was developed. With all three thermometric methods performed independently and in parallel, we aim to compare the potential and practical limitations of all three methods, disclose possibly undetected systematic effects of each method and thereby confirm or improve the previous measurements traceable to the cryogenic radiometer. This will give further and independent confidence in the thermodynamic temperature determination of the high-temperature fixed point's phase transitions.

  13. Development of the management for parenteral nutrition traceability in a standard hospital

    Directory of Open Access Journals (Sweden)

    Beatriz Bernabeu Soria

    2015-11-01

    Full Text Available Objective: to develop the traceability control and the hazard analysis in the processes of parenteral nutrients (PN. Method: a standardized graphical notation was generated, describing in detail each of the stages in the overall process. The presence of hazards was analysed by sequencing decisions. The existence of Control Points (CP or Critical Control Points (CCP was estimated by Criticality Index (CI for each hazard taking into account the probability of occurrence and the severity of the damage. The threshold for the IC was set in 6. Results: a specific flow chart for the management and traceability of PN was obtained, defining each of the stages in CPs (validation and transcription of the prescription and administration or CCPs (preparation, storage and infusion pump –flow and filter-. Stages regarding the delivery, the recovery and the recycle of the packing material of PNs are not considered CPs and, therefore, they were not included in the dashboard. Conclusions: PN must be dealt with in the frame of a standardized management system in order to improve patient safety, clinical relevance, maximize resource efficiency and minimize procedural issues. The proposed system provides a global management model whose steps are fully defined, allowing monitoring and verification of PN. It would be convenient to make use of a software application to support the monitoring of the traceability management and to store the historical records in order to evaluate the system.

  14. Innovative solutions in traceability to improve the competitiveness of a local fruit and vegetable retailing system

    Directory of Open Access Journals (Sweden)

    Miklós Pakurár

    2015-05-01

    Full Text Available The aim of the research is to investigate the network of local fruit and vegetable products from “farm to fork”, to uncover the hidden processes in traceability and to advise innovations in the retailing system to improve the competitiveness of the sector. Traceability is an ability to track any food that will be consumed throughout the processes of production, processing and distribution. The research investigates what the customer knows about the origin and treatments of purchased products and what further information would satisfy the consumer. The study explores the flow of information amongst the chain members: producers, wholesalers, small-scale retailers, and customers. Based on interviews and questionnaires, regression analysis and ordinal regression procedure were performed. Innovative solutions to make the retailing competitive should be aligned with the precise knowledge of the consumer. The results of the research show that deficiencies in data collection, data erosion, low level of cooperation of supply chain partners, not paying more attention for more detailed information, and inadequate control are the main problems of the traceability in fruit and vegetable chains.

  15. Traceable calibration and demonstration of a portable dynamic force transfer standard

    Science.gov (United States)

    Vlajic, Nicholas; Chijioke, Ako

    2017-08-01

    In general, the dynamic sensitivity of a force transducer depends upon the mechanical system in which it is used. This dependence serves as motivation to develop a dynamic force transfer standard, which can be used to calibrate an application transducer in situ. In this work, we SI-traceably calibrate a hand-held force transducer, namely an impact hammer, by using a mass suspended from a thin line which is cut to produce a known dynamic force in the form of a step function. We show that this instrument is a promising candidate as a transfer standard, since its dynamic response has small variance between different users. This calibrated transfer standard is then used to calibrate a secondary force transducer in an example application setting. The combined standard uncertainty (k  =  2) in the calibration of the transfer standard was determined to be 2.1% or less, up to a bandwidth of 5 kHz. The combined standard uncertainty (k  =  2) in the performed transfer calibration was less than 4%, up to 3 kHz. An advantage of the transfer calibration framework presented here, is that the transfer standard can be used to transfer SI-traceable calibrations without the use of any SI-traceable voltage metrology instrumentation.

  16. Establishing the traceability of a uranyl nitrate solution to a standard reference material

    International Nuclear Information System (INIS)

    Jackson, C.H.; Clark, J.P.

    1978-01-01

    A uranyl nitrate solution for use as a Working Calibration and Test Material (WCTM) was characterized, using a statistically designed procedure to document traceability to National Bureau of Standards Reference Material (SPM-960). A Reference Calibration and Test Material (PCTM) was prepared from SRM-960 uranium metal to approximate the acid and uranium concentration of the WCTM. This solution was used in the characterization procedure. Details of preparing, handling, and packaging these solutions are covered. Two outside laboratories, each having measurement expertise using a different analytical method, were selected to measure both solutions according to the procedure for characterizing the WCTM. Two different methods were also used for the in-house characterization work. All analytical results were tested for statistical agreement before the WCTM concentration and limit of error values were calculated. A concentration value was determined with a relative limit of error (RLE) of approximately 0.03% which was better than the target RLE of 0.08%. The use of this working material eliminates the expense of using SRMs to fulfill traceability requirements for uranium measurements on this type material. Several years' supply of uranyl nitrate solution with NBS traceability was produced. The cost of this material was less than 10% of an equal quantity of SRM-960 uranium metal

  17. Analyzing organic tea certification and traceability system within the Taiwanese tea industry.

    Science.gov (United States)

    Wang, Mao-Chang; Yang, Chin-Ying

    2015-04-01

    We applied game theory to the organic tea certification process and traceability system used by the Taiwanese tea industry to elucidate the strategic choices made by tea farmers and organic tea certification agencies. Thus, this paper clarifies how relevant variables affect the organic certification process and traceability system used within the tea industry. The findings indicate that farmers who generate high revenues experience failures regarding tea deliveries, cash outflow, damage compensation, and quasi-rent. An additional problem included the high costs yielded when tea farmers colluded with or switched organic tea certification agencies. Furthermore, there could be decreasing levels of personal interest in planting non-organic tea and lowering the costs of planting organic tea and the managerial accounting costs of building comprehensive traceability systems; thus, the analysis yielded strong results and a superior equilibrium. This research is unprecedented, using an innovative model and providing a novel analysis structure for use in the tea industry. These results contribute to the field of literature and should serve as a valuable reference for members of the tea industry, government, and academia. © 2014 Society of Chemical Industry.

  18. Traceability System Model for Quality Gelatin Raw Material of Cattle Hides

    Directory of Open Access Journals (Sweden)

    S Nur

    2010-09-01

    Full Text Available Several criteria must be accomplished within the provision of quality products in terms of the types of materials, the processing methods and effort to get it. Traceability system involves various parties that have different needs and goals in the process of supplying raw materials. Hence, there is a need for institutional systems engineering that can organize and manage the tracking process, the procurement of raw materials that guarantee the origin of gelatin raw materials, and facilitate the industry and customer to create a standardized quality of product. The purpose of the study formulates the institutional tracking models of gelatin raw material from cattle hide based on various criteria and assessment of the expert opinion. The methods used in this study were Interpretative structural modeling to formulate a representation of institutional tracking efficiently and analytical hierarchy process to determine the tracking strategy of industrial gelatin raw materials from cowhide. The results obtained from the study were some key elements of institutional tracking model for industrial gelatin raw materials from cowhide and the traceability strategies for industrial raw materials from cattle hide gelatin Indonesia. (Animal Production 12(3: 190-198 (2010 Key Words: traceability, institutional model, cattle hide, gelatin

  19. Establishing traceability of photometric absorbance values for accurate measurements of the haemoglobin concentration in blood

    Science.gov (United States)

    Witt, K.; Wolf, H. U.; Heuck, C.; Kammel, M.; Kummrow, A.; Neukammer, J.

    2013-10-01

    Haemoglobin concentration in blood is one of the most frequently measured analytes in laboratory medicine. Reference and routine methods for the determination of the haemoglobin concentration in blood are based on the conversion of haeme, haemoglobin and haemiglobin species into uniform end products. The total haemoglobin concentration in blood is measured using the absorbance of the reaction products. Traceable absorbance measurement values on the highest metrological level are a prerequisite for the calibration and evaluation of procedures with respect to their suitability for routine measurements and their potential as reference measurement procedures. For this purpose, we describe a procedure to establish traceability of spectral absorbance measurements for the haemiglobincyanide (HiCN) method and for the alkaline haematin detergent (AHD) method. The latter is characterized by a higher stability of the reaction product. In addition, the toxic hazard of cyanide, which binds to the iron ion of the haem group and thus inhibits the oxygen transport, is avoided. Traceability is established at different wavelengths by applying total least-squares analysis to derive the conventional quantity values for the absorbance from the measured values. Extrapolation and interpolation are applied to get access to the spectral regions required to characterize the Q-absorption bands of the HiCN and AHD methods, respectively. For absorbance values between 0.3 and 1.8, the contributions of absorbance measurements to the total expanded uncertainties (95% level of confidence) of absorbance measurements range from 1% to 0.4%.

  20. Traceability of Boletaceae mushrooms using data fusion of UV-visible and FTIR combined with chemometrics methods.

    Science.gov (United States)

    Yao, Sen; Li, Tao; Liu, HongGao; Li, JieQing; Wang, YuanZhong

    2018-04-01

    Boletaceae mushrooms are wild-grown edible mushrooms that have high nutrition, delicious flavor and large economic value distributing in Yunnan Province, China. Traceability is important for the authentication and quality assessment of Boletaceae mushrooms. In this study, UV-visible and Fourier transform infrared (FTIR) spectroscopies were applied for traceability of 247 Boletaceae mushroom samples in combination with chemometrics. Compared with a single spectroscopy technique, data fusion strategy can obviously improve the classification performance in partial least square discriminant analysis (PLS-DA) and grid-search support vector machine (GS-SVM) models, for both species and geographical origin traceability. In addition, PLS-DA and GS-SVM models can provide 100.00% accuracy for species traceability and have reliable evaluation parameters. For geographical origin traceability, the accuracy of prediction in the PLS-DA model by data fusion was just 64.63%, but the GS-SVM model based on data fusion was 100.00%. The results demonstrated that the data fusion strategy of UV-visible and FTIR combined with GS-SVM could provide a higher synergic effect for traceability of Boletaceae mushrooms and have a good generalization ability for the comprehensive quality control and evaluation of similar foods. © 2017 Society of Chemical Industry. © 2017 Society of Chemical Industry.

  1. Liquid Scintillation Counting Standardization of {sup 2}2NaCl by te CIEMAT/NIST method; Calibracion por Centelleo Liquido del ''22NaCl, mediante el metodo CIEMAT/NIST

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Barquero, L.; Grau Carles, A.; Grau Malonda, A.

    1995-07-01

    We describe a procedure for preparing a stable solution of ''22NaCl for liquid scintillation counting and its counting stability and spectral evolution in Insta-Gel''R is studied. The solution has been standardised in terms of activity concentration by the CIEMAT/NIST method with discrepancies between experimental and computed efficiencies lower than 0.4 % and an overall uncertainty of 0.35 %. (Author) 4 refs.

  2. Charpy impact test results on five materials and NIST verification specimens using instrumented 2-mm and 8-mm strikers

    International Nuclear Information System (INIS)

    Nanstad, R.K.; Sokolov, M.A.

    1995-01-01

    The Heavy-Section Steel Irradiation Program at Oak Ridge National Laboratory is involved in two cooperative projects, with international participants, both of which involve Charpy V-notch impact tests with instrumented strikers of 2mm and 8mm radii. Two heats of A 533 grade B class I pressure vessel steel and a low upper-shelf (LUS) submerged-arc (SA) weld were tested on the same Charpy machine, while one heat of a Russian Cr-Mo-V forging steel and a high upper-shelf (HUS) SA weld were tested on two different machines. The number of replicate tests at any one temperature ranged from 2 to 46 specimens. Prior to testing with each striker, verification specimens at the low, high, and super high energy levels from the National Institute of Standards and Technology (NIST) were tested. In the two series of verification tests, the tests with the 2mm striker met the requirements at the low and high energy levels but not at the super high energy. For one plate, the 2mm striker showed somewhat higher average absorbed energies than those for the 8-mm striker at all three test temperatures. For the second plate and the LUS weld, however, the 2mm striker showed somewhat lower energies at both test temperatures. For the Russian forging steel and the HUS weld, tests were conducted over a range of temperatures with tests at one laboratory using the 8mm striker and tests at a second laboratory using the 2mm striker. Lateral expansion was measured for all specimens and the results are compared with the absorbed energy results. The overall results showed generally good agreement (within one standard deviation) in energy measurements by the two strikers. Load-time traces from the instrumented strikers were also compared and used to estimate shear fracture percentage. Four different formulas from the European Structural Integrity Society draft standard for instrumented Charpy test are compared and a new formula is proposed for estimation of percent shear from the force-time trace

  3. Food Traceability Based on Internet of Things%食品溯源物联网系统的实现

    Institute of Scientific and Technical Information of China (English)

    刘晓峰; 刘智斌; 禹继国

    2013-01-01

      This project starts from the production origin to realize the food traceability based on Internet of Things. Through this system, the consumers can acquire detailed processing records form food source to retail stores. This project is based on the technologies such as internet of things, mobile Internet, and RFID, the software system is developed based on the framework of S2SH. Moreover data mining technique is applied to guide the enterprise decision in this system. In application, the system achieves the design requirements successfully.%  本项目从食品的生产源头开始,对每一具体食品经过哪一工序,通过哪一环节到了消费者手中,都能查询到详细记录。本项目基于物联网、移动互联网等技术,充分应用了RFID的最新成果,软件系统基于S2SH框架来实现。运用数据挖掘技术对企业决策进行指导。应用中,该系统较好地实现了设计要求。

  4. Seafood Technology

    DEFF Research Database (Denmark)

    Børresen, Torger

    This presentation will fill the total picture of this conference between fisheries and aquaculture, blue biotech and bioconservation, by considering the optimal processing technology of marine resources from the raw material until the seafood reaches the plate of the consumer. The situation today...... must be performed such that total traceability and authenticity of the final products can be presented on demand. The most important aspects to be considered within seafood technology today are safety, healthy products and high eating quality. Safety can be divided into microbiological safety...... and not presenting any safety risk per se. Seafood is healthy due to the omega-3 fatty acids and the nutritional value of vitamins, peptides and proteins. The processing technology must however be performed such that these valuable features are not lost during production. The same applies to the eating quality. Any...

  5. Fluid-flow-rate metrology: laboratory uncertainties and traceabilities

    Science.gov (United States)

    Mattingly, G. E.

    1991-03-01

    Increased concerns for improved fluid flowrate measurement are driving the fluid metering community-meter manufacturers and users alike-to search for better verification and documentation for their fluid measurements. These concerns affect both our domestic and international market places they permeate our technologies - aerospace chemical processes automotive bioengineering etc. They involve public health and safety and they impact our national defense. These concerns are based upon the rising value of fluid resources and products and the importance of critical material accountability. These values directly impact the accuracy needs of fluid buyers and sellers in custody transfers. These concerns impact the designers and operators of chemical process systems where control and productivity optimization depend critically upon measurement precision. Public health and safety depend upon the quality of numerous pollutant measurements - both liquid and gaseous. The performance testing of engines - both automotive and aircraft are critically based upon accurate fuel measurements - both liquid and oxidizer streams. Fluid flowrate measurements are established differently from counterparts in length and mass measurement systems because these have the benefits of " identity" standards. For rate measurement systems the metrology is based upon " derived standards" . These use facilities and transfer standards which are designed built characterized and used to constitute basic measurement capabilities and quantify performance - accuracy and precision. Because " identity standards" do not exist for flow measurements facsimiles or equivalents must

  6. A Coordinated Research Project on the Implementation of Nuclear Techniques to Improve Food Traceability

    Science.gov (United States)

    Frew, Russell; Cannavan, Andrew; Zandric, Zora; Maestroni, Britt; Abrahim, Aiman

    2013-04-01

    Traceability systems play a key role in assuring a safe and reliable food supply. Analytical techniques harnessing the spatial patterns in distribution of stable isotope and trace element ratios can be used for the determination of the provenance of food. Such techniques offer the potential to enhance global trade by providing an independent means of verifying "paper" traceability systems and can also help to prove authenticity, to combat fraudulent practices, and to control adulteration, which are important issues for economic, religious or cultural reasons. To address some of the challenges that developing countries face in attempting to implement effective food traceability systems, the IAEA, through its Joint FAO/IAEA Division on Nuclear Techniques in Food and Agriculture, has initiated a 5-year coordinated research project involving institutes in 15 developing and developed countries (Austria, Botswana, Chile, China, France, India, Lebanon, Morocco, Portugal, Singapore, Sweden, Thailand, Uganda, UK, USA). The objective is to help in member state laboratories to establish robust analytical techniques and databases, validated to international standards, to determine the provenance of food. Nuclear techniques such as stable isotope and multi-element analysis, along with complementary methods, will be applied for the verification of food traceability systems and claims related to food origin, production, and authenticity. This integrated and multidisciplinary approach to strengthening capacity in food traceability will contribute to the effective implementation of holistic systems for food safety and control. The project focuses mainly on the development of techniques to confirm product authenticity, with several research partners also considering food safety issues. Research topics encompass determination of the geographical origin of a variety of commodities, including seed oils, rice, wine, olive oil, wheat, orange juice, fish, groundnuts, tea, pork, honey and

  7. A comparative study of 129I content in environmental standard materials IAEA-375, NIST SRM 4354 and NIST SRM 4357 by Thermal Ionization Mass Spectrometry and Accelerator Mass Spectrometry

    Energy Technology Data Exchange (ETDEWEB)

    Olson, John; Adamic, Mary; Snyder, Darin; Brookhart, Jacob; Hahn, Paula; Watrous, Matthew

    2016-11-01

    Iodine environmental measurements have consistently been backed up in the literature by standard materials like IAEA-375, Chernobyl Soil. There are not many other sources of a certified reference material for 129I content for mass spectrometry measurements. Some that have been found in the literature include NIST-4354 and NIST-4357. They are still available at the time of this writing. They don’t have certified content or isotopic values. There has been some work in the literature to show that iodine is present, but there hasn’t been enough to establish a consensus value. These materials have been analyzed at INL through two separate mass spectrometry techniques. They involve a combustion method of the starting material in oxygen, followed by TIMS analysis and a leaching preparation analyzed by accelerator mass spectrometry. Combustion/TIMS preparation of NIST SRM-4354 resulted in a 129I/127I ratio of 1.92 x 10-6 which agrees with AMS measurements which measured the 129I/127I ratio to be 1.93 x 10-6.

  8. Results and Systematic Studies of the UCN Lifetime Experiment at NIST

    Science.gov (United States)

    Huffer, Craig Reeves

    The neutron beta-decay lifetime is important in understanding weak interactions in the framework of the Standard Model, and it is an input to nuclear astrophysics and Big Bang Nucleosynthesis. Current measurements of the neutron beta-decay lifetime disagree, which has motivated additional experiments that are sensitive to different sets of systematic effects. An effort continues at the NIST Center for Neutron Research (NCNR) to improve the statistical and systematic limitations of an experiment to measure the neutron beta-decay lifetime using magnetically trapped UCN. In the experiment, a monoenergetic 0:89 nm cold neutron is incident on a superfluid 4He target within the minimum field region of an Ioffe type magnetic trap. Some of the neutrons are subsequently downscattered by single phonons in the helium to low energies (≈ 200 neV), and those in the appropriate spin state become trapped. The inverse process, upscattering of UCN, is suppressed by the low phonon density in the analysis, data, and systematics will be discussed. After accounting for the systematic effects the measured lifetime disagrees with the current PDG mean neutron beta-decay lifetime by about 9 of our standard deviations, which is a strong indication of unaccounted for systematic effects. Additional 3He contamination will be shown to be the most likely candidate for the additional systematic shift, which motivated the commissioning and initial operation of a heat flush purifier for purifying additional 4He. This work ends with a description of the 4He purifier and its performance.

  9. Analysis of Loss-of-Coolant Accidents in the NIST Research Reactor - Early Phase

    Energy Technology Data Exchange (ETDEWEB)

    Baek, Joo S.; Diamond, David

    2016-12-06

    A study of the fuel temperature during the early phase of a loss-of-coolant accident (LOCA) in the NIST research reactor (NBSR) was completed. Previous studies had been reported in the preliminary safety analysis report for the conversion of the NBSR from high-enriched uranium (HEU) fuel to low-enriched (LEU) fuel. Those studies had focused on the most vulnerable LOCA situation, namely, a double-ended guillotine break in the time period after reactor trip when water is drained from either the coolant channels inside the fuel elements or the region outside the fuel elements. The current study fills in a gap in the analysis which is the early phase of the event when there may still be water present but the reactor is at power or immediately after reactor trip and pumps have tripped. The calculations were done, for both the current HEU-fueled core and the proposed LEU core, with the TRACE thermal-hydraulic systems code. Several break locations and different break sizes were considered. In all cases the increase in the clad (or fuel meat) temperature was relatively small so that a large margin to the temperature threshold for blistering (the Safety Limit for the NBSR) remained.

  10. Analysis of JPSS J1 VIIRS Polarization Sensitivity Using the NIST T-SIRCUS

    Science.gov (United States)

    McIntire, Jeffrey W.; Young, James B.; Moyer, David; Waluschka, Eugene; Oudrari, Hassan; Xiong, Xiaoxiong

    2015-01-01

    The polarization sensitivity of the Joint Polar Satellite System (JPSS) J1 Visible Infrared Imaging Radiometer Suite (VIIRS) measured pre-launch using a broadband source was observed to be larger than expected for many reflective bands. Ray trace modeling predicted that the observed polarization sensitivity was the result of larger diattenuation at the edges of the focal plane filter spectral bandpass. Additional ground measurements were performed using a monochromatic source (the NIST T-SIRCUS) to input linearly polarized light at a number of wavelengths across the bandpass of two VIIRS spectral bands and two scan angles. This work describes the data processing, analysis, and results derived from the T-SIRCUS measurements, comparing them with broadband measurements. Results have shown that the observed degree of linear polarization, when weighted by the sensor's spectral response function, is generally larger on the edges and smaller in the center of the spectral bandpass, as predicted. However, phase angle changes in the center of the bandpass differ between model and measurement. Integration of the monochromatic polarization sensitivity over wavelength produced results consistent with the broadband source measurements, for all cases considered.

  11. Comprehensive protocol of traceability during IVF: the result of a multicentre failure mode and effect analysis.

    Science.gov (United States)

    Rienzi, L; Bariani, F; Dalla Zorza, M; Albani, E; Benini, F; Chamayou, S; Minasi, M G; Parmegiani, L; Restelli, L; Vizziello, G; Costa, A Nanni

    2017-08-01

    Can traceability of gametes and embryos be ensured during IVF? The use of a simple and comprehensive traceability system that includes the most susceptible phases during the IVF process minimizes the risk of mismatches. Mismatches in IVF are very rare but unfortunately possible with dramatic consequences for both patients and health care professionals. Traceability is thus a fundamental aspect of the treatment. A clear process of patient and cell identification involving witnessing protocols has to be in place in every unit. To identify potential failures in the traceability process and to develop strategies to mitigate the risk of mismatches, previously failure mode and effects analysis (FMEA) has been used effectively. The FMEA approach is however a subjective analysis, strictly related to specific protocols and thus the results are not always widely applicable. To reduce subjectivity and to obtain a widespread comprehensive protocol of traceability, a multicentre centrally coordinated FMEA was performed. Seven representative Italian centres (three public and four private) were selected. The study had a duration of 21 months (from April 2015 to December 2016) and was centrally coordinated by a team of experts: a risk analysis specialist, an expert embryologist and a specialist in human factor. Principal investigators of each centre were first instructed about proactive risk assessment and FMEA methodology. A multidisciplinary team to perform the FMEA analysis was then formed in each centre. After mapping the traceability process, each team identified the possible causes of mistakes in their protocol. A risk priority number (RPN) for each identified potential failure mode was calculated. The results of the FMEA analyses were centrally investigated and consistent corrective measures suggested. The teams performed new FMEA analyses after the recommended implementations. In each centre, this study involved: the laboratory director, the Quality Control & Quality

  12. Blockchain protocols in clinical trials: Transparency and traceability of consent [version 5; referees: 1 approved, 2 approved with reservations, 2 not approved

    Directory of Open Access Journals (Sweden)

    Mehdi Benchoufi

    2018-02-01

    Full Text Available Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing for collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we build a consent workflow using a trending technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient’s consent collection using Blockchain, thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each protocol revision, consent was sought again.  We obtained a single document, in an open format, that accounted for the whole consent collection process: a time-stamped consent status regarding each version of the protocol. This document cannot be corrupted and can be checked on any dedicated public website. It should be considered a robust proof of data. However, in a live clinical trial, the authentication system should be strengthened to remove the need for third parties, here trial stakeholders, and give participative control to the peer users. In the future, the complex data flow of a clinical trial could be tracked by using Blockchain, which core functionality, named Smart Contract, could help prevent clinical trial events not occurring in the correct chronological order, for example including patients before they consented or analysing case report form data before freezing the database. Globally, Blockchain could help with reliability, security

  13. Blockchain protocols in clinical trials: Transparency and traceability of consent [version 4; referees: 1 approved, 2 approved with reservations, 2 not approved

    Directory of Open Access Journals (Sweden)

    Mehdi Benchoufi

    2017-12-01

    Full Text Available Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing for collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we build a consent workflow using a trending technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient’s consent collection using Blockchain, thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each protocol revision, consent was sought again.  We obtained a single document, in an open format, that accounted for the whole consent collection process: a time-stamped consent status regarding each version of the protocol. This document cannot be corrupted and can be checked on any dedicated public website. It should be considered a robust proof of data. However, in a live clinical trial, the authentication system should be strengthened to remove the need for third parties, here trial stakeholders, and give participative control to the peer users. In the future, the complex data flow of a clinical trial could be tracked by using Blockchain, which core functionality, named Smart Contract, could help prevent clinical trial events not occurring in the correct chronological order, for example including patients before they consented or analysing case report form data before freezing the database. Globally, Blockchain could help with reliability, security

  14. Blockchain protocols in clinical trials: Transparency and traceability of consent [version 3; referees: 1 approved, 2 approved with reservations, 1 not approved

    Directory of Open Access Journals (Sweden)

    Mehdi Benchoufi

    2017-07-01

    Full Text Available Clinical trial consent for protocols and their revisions should be transparent for patients and traceable for stakeholders. Our goal is to implement a process allowing the collection of patients’ informed consent, which is bound to protocol revisions, storing and tracking the consent in a secure, unfalsifiable and publicly verifiable way, and enabling the sharing of this information in real time. For that, we will built a consent workflow using a rising technology called Blockchain. This is a distributed technology that brings a built-in layer of transparency and traceability. From a more general and prospective point of view, we believe Blockchain technology brings a paradigmatical shift to the entire clinical research field. We designed a Proof-of-Concept protocol consisting of time-stamping each step of the patient’s consent collection using Blockchain; thus archiving and historicising the consent through cryptographic validation in a securely unfalsifiable and transparent way. For each revision of the protocol, consent was sought again. We obtained a single document, in a standard open format, that accounted for the whole consent collection process: timestamped consent status with regards to each version of the protocol. This document cannot be corrupted, and can be checked on any dedicated public website. It should be considered as a robust proof of data. However, in a live clinical trial, the authentication system should be strengthened in order to remove the need for third parties, here the trial stakeholders, and give participative control to the peer-to-peer users. In the future, we think that the complex data flow of a clinical trial can be tracked using Blockchain, that a blockchain core functionality, named Smart Contract, could help prevent clinical trial events not to happen in the right chronological order: for example including patients before they consented or analysing case report forms data before freezing the database

  15. Liquid scintillation counting standardization of ''125 I in organic and inorganic samples by the CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Grau Malonda, A.; Los Arcos Merino, J.M.; Grau Carles, A.

    1994-01-01

    The liquid scintillation counting standardization of organic and inorganic samples of ''125 I by the CIEMAT/NIST method using five different scintillators is described. The discrepancies between experimental and computed efficiencies are lower than 1.4% and 1.7%, for inorganic and organic samples, respectively, in the interval 421-226 of quenching parameter. Both organic and inorganic solutions have been standardized in terms of activity concentration to an overall uncertainty of 0.76%

  16. Liquid scintillation counting standardization of 125I in organic and inorganic samples by the CIEMAT/NIST method

    International Nuclear Information System (INIS)

    Rodriguez Barquero, L.; Grau Malonda, A.; Los Arcos Merino, J. M.; Grau Carles, A.

    1994-01-01

    The liquid scintillation counting standardization of organic and inorganic samples of ''I25I by the CIEMAT/NIST method using five different scintillators is described. The discrepancies between experimental and computed efficiencies are lower than 1.4% and 1.7%, for inorganic and organic samples, respectively, in the interval 421-226 of quenching parameter. Both organic and inorganic solutions have been standardized in terms of activity concentration to an overall uncertainty of 0.76%. (Author) 14 refs

  17. Mercury Continuous Emmission Monitor Calibration

    Energy Technology Data Exchange (ETDEWEB)

    John Schabron; Eric Kalberer; Ryan Boysen; William Schuster; Joseph Rovani

    2009-03-12

    Mercury continuous emissions monitoring systems (CEMs) are being implemented in over 800 coal-fired power plant stacks throughput the U.S. Western Research Institute (WRI) is working closely with the Electric Power Research Institute (EPRI), the National Institute of Standards and Technology (NIST), and the Environmental Protection Agency (EPA) to facilitate the development of the experimental criteria for a NIST traceability protocol for dynamic elemental mercury vapor calibrators/generators. These devices are used to calibrate mercury CEMs at power plant sites. The Clean Air Mercury Rule (CAMR) which was published in the Federal Register on May 18, 2005 and vacated by a Federal appeals court in early 2008 required that calibration be performed with NIST-traceable standards. Despite the vacature, mercury emissions regulations in the future will require NIST traceable calibration standards, and EPA does not want to interrupt the effort towards developing NIST traceability protocols. The traceability procedures will be defined by EPA. An initial draft traceability protocol was issued by EPA in May 2007 for comment. In August 2007, EPA issued a conceptual interim traceability protocol for elemental mercury calibrators. The protocol is based on the actual analysis of the output of each calibration unit at several concentration levels ranging initially from about 2-40 {micro}g/m{sup 3} elemental mercury, and in the future down to 0.2 {micro}g/m{sup 3}, and this analysis will be directly traceable to analyses by NIST. The EPA traceability protocol document is divided into two separate sections. The first deals with the qualification of calibrator models by the vendors for use in mercury CEM calibration. The second describes the procedure that the vendors must use to certify the calibrators that meet the qualification specifications. The NIST traceable certification is performance based, traceable to analysis using isotope dilution inductively coupled plasma

  18. Research on the Consumers Willingness to Buy Traceable Pork with Different Quality Information:A Case Study of Consumers in Weifang, Shandong Province

    Institute of Scientific and Technical Information of China (English)

    Fan; BU; Dian; ZHU; Linhai; WU

    2013-01-01

    The traceability system can effectively reduce the food safety risks, however, it is confronted with various problems during its implementation. In this context, the paper carries out a case study of consumers in Weifang, Shandong Province, and studies their willingness to pay the traceable pork with different quality information. The results indicate that, the consumers show high expectations towards the introduction of traceability system, and they tend to buy the traceable pork only with breeding and slaughter information; their behaviors of purchase are greatly influenced by the following factors: the consumers education, age, income, attention on food safety and whether there are pregnant family members, etc..

  19. Fluorescent graphene quantum dots as traceable, pH-sensitive drug delivery systems

    Directory of Open Access Journals (Sweden)

    Qiu J

    2015-10-01

    Full Text Available Jichuan Qiu,1 Ruibin Zhang,2 Jianhua Li,1 Yuanhua Sang,1 Wei Tang,3 Pilar Rivera Gil,4 Hong Liu1,51Center of Bio and Micro/Nano Functional Materials, State Key Laboratory of Crystal Materials, Shandong University, 2Blood Purification Center, Jinan Central Hospital, 3Department of Pathogenic Biology, Shandong University School of Medicine, Jinan, People’s Republic of China; 4Institute of Chemistry, Rovira i Virgili University, Tarragona, Spain; 5Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaAbstract: Graphene quantum dots (GQDs were rationally fabricated as a traceable drug delivery system for the targeted, pH-sensitive delivery of a chemotherapeutic drug into cancer cells. The GQDs served as fluorescent carriers for a well-known anticancer drug, doxorubicin (Dox. The whole system has the capacity for simultaneous tracking of the carrier and of drug release. Dox release is triggered upon acidification of the intracellular vesicles, where the carriers are located after their uptake by cancer cells. Further functionalization of the loaded carriers with targeting moieties such as arginine-glycine-aspartic acid (RGD peptides enhanced their uptake by cancer cells. DU-145 and PC-3 human prostate cancer cell lines were used to evaluate the anticancer ability of Dox-loaded RGD-modified GQDs (Dox-RGD-GQDs. The results demonstrated the feasibility of using GQDs as traceable drug delivery systems with the ability for the pH-triggered delivery of drugs into target cells.Keywords: graphene quantum dots, drug delivery, pH-sensitive, controlled release, traceable

  20. Coherent double-color interference microscope for traceable optical surface metrology

    Science.gov (United States)

    Malinovski, I.; França, R. S.; Bessa, M. S.; Silva, C. R.; Couceiro, I. B.

    2016-06-01

    Interference microscopy is an important field of dimensional surface metrology because it provides direct traceability of the measurements to the SI base unit definition of the metre. With a typical measurement range from micrometres to nanometres interference microscopy (IM) covers the gap between classic metrology and nanometrology, providing continuous transfer of dimensional metrology into new areas of nanoscience and nanotechnology. Therefore IM is considered to be an indispensable tool for traceable transfer of the metre unit to different instruments. We report here the metrological study of an absolute Linnik interference microscope (IM) based on two frequency stabilized lasers. The design permits the flexible use of both lasers for measurements depending on the demand of the concrete measurement task. By principle of operation IM is combination of imaging and phase-shifting interferometry (PSI). The traceability is provided by the wavelength reference, that is, a He-Ne 633 nm stabilized laser. The second laser source, that is, a Blue-Green 488 nm grating stabilized laser diode, is used for improvements of resolution, and also for resolving integer fringe discontinuities on sharp features of the surface. The IM was optimized for surface height metrology. We have performed the study of the systematic effects of the measurements. This study allowed us to improve the hardware and software of IM and to find corrections for main systematic errors. The IM is purposed for 1D to 3D height metrology and surface topography in an extended range from nanometres to micrometres. The advantages and disadvantages of the design and developed methods are discussed.

  1. Coherent double-color interference microscope for traceable optical surface metrology

    International Nuclear Information System (INIS)

    Malinovski, I; França, R S; Bessa, M S; Silva, C R; Couceiro, I B

    2016-01-01

    Interference microscopy is an important field of dimensional surface metrology because it provides direct traceability of the measurements to the SI base unit definition of the metre. With a typical measurement range from micrometres to nanometres interference microscopy (IM) covers the gap between classic metrology and nanometrology, providing continuous transfer of dimensional metrology into new areas of nanoscience and nanotechnology. Therefore IM is considered to be an indispensable tool for traceable transfer of the metre unit to different instruments. We report here the metrological study of an absolute Linnik interference microscope (IM) based on two frequency stabilized lasers. The design permits the flexible use of both lasers for measurements depending on the demand of the concrete measurement task. By principle of operation IM is combination of imaging and phase-shifting interferometry (PSI). The traceability is provided by the wavelength reference, that is, a He-Ne 633 nm stabilized laser. The second laser source, that is, a Blue-Green 488 nm grating stabilized laser diode, is used for improvements of resolution, and also for resolving integer fringe discontinuities on sharp features of the surface. The IM was optimized for surface height metrology. We have performed the study of the systematic effects of the measurements. This study allowed us to improve the hardware and software of IM and to find corrections for main systematic errors. The IM is purposed for 1D to 3D height metrology and surface topography in an extended range from nanometres to micrometres. The advantages and disadvantages of the design and developed methods are discussed. (paper)

  2. The role of psychological determinants and demographic factors in consumer demand for farm-to-fork traceability systems.

    Science.gov (United States)

    Myae, Aye Chan; Goddard, Ellen; Aubeeluck, Ashwina

    2011-01-01

    Traceability systems are an important tool (1) for tracking, monitoring, and managing product flows through the supply chain for better efficiency and profitability of suppliers, and (2) to improve consumer confidence in the face of serious food safety incidents. After the global bovine spongiform encephalopathy (BSE) crisis affected producers, consumers, trade, and the health status of animals and humans, new systems to help confirm the status of cattle products along the supply chain from farm to fork were implemented in many countries (Trautman et al. 2008 ). In this study, people's overall food safety beliefs are explored with the main objective of measuring the link between their food safety beliefs and their attitudes toward traceability. A comparison is made among English-speaking Canadians, French-speaking Canadians, and Japanese consumers. In the study, an Internet-based survey was used to collect data from nationally representative samples of the population in Canada-English (1275), Canada-French (343), and Japanese (1940) in the summer of 2009. Respondents' interests in traceability systems are clearly linked to their sense that the industry is primarily responsible for any food safety outbreaks. Moreover, it is clear that certain segments of the population in all samples feel strongly about the importance of farm to fork traceability in beef; thus, policymakers may wish to consider extending traceability beyond the point of slaughter as a way of encouraging beef sales in Canada.

  3. Soft fruit traceability in food matrices using real-time PCR.

    Science.gov (United States)

    Palmieri, Luisa; Bozza, Elisa; Giongo, Lara

    2009-02-01

    Food product authentication provides a means of monitoring and identifying products for consumer protection and regulatory compliance. There is a scarcity of analytical methods for confirming the identity of fruit pulp in products containing Soft Fruit. In the present work we have developed a very sensible qualitative and quantitative method to determine the presence of berry DNAs in different food matrices. To our knowledge, this is the first study that shows the applicability, to Soft Fruit traceability, of melting curve analysis and multiplexed fluorescent probes, in a Real-Time PCR platform. This methodology aims to protect the consumer from label misrepresentation.

  4. Verification of traceability and backscattering in surface entrance air kerma measurements with detector type ionizing chamber

    International Nuclear Information System (INIS)

    Teixeira, G.J.; Peixoto, J.G.P.

    2013-01-01

    Measurements of doses in radiology services by ionizing chambers are easier than those made by TLD, however the protocols for measurements differ regarding the calibration. The objectives were to verify the traceability in the measures of ESAK corrected by the inverse square law, due to the difference in position between the source and IC and the influence of the backscattered radiation in bringing the detector to the table. Was defined a procedure practiced by the radiological services and designed experimental arrangements for the same technique. Was noted that the approximation of the detector to the table generated a significant backscattered. (author)

  5. Traceability of a panoramic gamma irradiator using different TLD systems as transfer instruments

    International Nuclear Information System (INIS)

    Romero, A.M.; Saez, J.C.

    1994-01-01

    This work shows the calibration in terms of the new operational radiological quantities Hp(10) and H*(10) for different TLD systems (Harshaw TLD-100 and Panasonic UD-802) used in personal and environmental monitoring. The irradiations were performed in the Spanish Reference Laboratory in radiation protection levels, managed by the CIEMAT Metrology of ionizing radiations Unit. With these data, different calibrations of a panoramic gamma irradiator in terms of the radiological quantity for unit of time were established, providing the traceability of the irradiator to the Reference Laboratory using the corresponding TLD systems as transfer instruments. (Author) 9 refs

  6. Traceability of a panoramic gamma irradiator using different TLD systems as transfer Instruments

    International Nuclear Information System (INIS)

    Romero, A. M.; Saez, J. C

    1994-01-01

    This work shows the calibration in terms of the new operational radiological quantities Hp (10) and H(10) for different TLD systems (Harshaw TLD-100 and Panasonic UD-002) used in personal and environmental monitoring. The irradiations were performed in the Spanish Reference Laboratory in radiation protection levels, managed by the CIEMAT Metrology of ionizing radiations Unit. With those data, different calibrations of a panoramic gamma irradiator in terms of the radiological quantity for unit of time were established, providing the traceability of the irradiator to the Reference Laboratory using the corresponding TLD systems as transfer instruments. (Author) 9 refs

  7. Produção segura e rastreabilidade de hortaliças Safe production and traceability of vegetables

    Directory of Open Access Journals (Sweden)

    Leonora M Mattos

    2009-12-01

    haja perda de seu valor nutritivo e com qualidade sensorial ótima.Consumers all over the world are aware about the strict relation among health and the necessity of a balanced diet, based on safe products. Nevertheless, interest in food functional properties and, especially, in its antioxidant activity has been increasing. However, the consumption of in natura food may present some risks, which are mainly related to chemical and microbiological contamination during the crop growing season. Considering the high competitiveness of the different productive chains, growers are working to offer products with superior value and quality, with emphasis in food safety and traceability. The hazards in food chain can be managed by monitoring the whole process, from production to distribution, so, in order to minimize the possibility of contamination, ,the implementation of traceability systems and procedures of quality assurance, such as HACCP (Hazard Analysis and Critical Control Points is necessary,. The application of Good Agricultural Practices (GAP to the fruit and vegetable production is a prerequisite for the success of HACCP and, in this context, the Integrated Production Program main objective is to increase quality and competitiveness of Brazilian agribusiness in order to reach the levels required by international market. Its main focus are the preservation of vegetable functional properties and the utilization of techniques that ensure food safety and traceability, ensuring the previously guaranteed quality levels. The present work focuses on technologies that allow consumers to have a safe and traceable product, to prevent nutritional content wastes and to ensure maximum food sensory quality.

  8. Liquid scintillation counting standardization of 125I in organic and inorganic samples by the CIEMAT/NIST method; Calibracion por centelleo liquido del 125I en muestras inorganicas y organicas, mediante el metodo CIEMAT/NIST

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Barquero, L.; Grau Malonda, A.; Los Arcos Merino, J. M.; Grau Carles, A.

    1994-07-01

    The liquid scintillation counting standardization of organic and inorganic samples of ''I25I by the CIEMAT/NIST method using five different scintillators is described. The discrepancies between experimental and computed efficiencies are lower than 1.4% and 1.7%, for inorganic and organic samples, respectively, in the interval 421-226 of quenching parameter. Both organic and inorganic solutions have been standardized in terms of activity concentration to an overall uncertainty of 0.76%. (Author) 14 refs.

  9. Traceability and communication of requirements in digital and I and C systems development - Project report 2003[TACO. Reactor safety

    Energy Technology Data Exchange (ETDEWEB)

    Sivertsen, T.; Frederiksen, R.; Thunem, A.P.J. [Institute for Energy Technology (IFE), Kjeller (Norway); Holmberg, J.E.; Valkonen, J.; Ventae, O. [VTT, Espoo (Finland)

    2004-03-01

    The overall objective of the TACO project is to improve the knowledge on principles and best practices related to the issues concretised in the preproject. On basis of experiences in the Nordic countries, the project aims at identifying the best practices and most important criteria for ensuring effective communication in relation to requirements elicitation and analysis, understandability of requirements to all parties, and traceability of requirements through the different design phases. It is expected that the project will provide important input to the development of guidelines and establishment of recommended practices related to these activities. In the year 2003, the TACO-project concentrated on four central issues: 1) Representation of requirements origins. 2) Traceability techniques. 3) Configuration management and the traceability of requirements. 4) Identification and categorisation of system aspects and their models The work was presented at the first TACO Industrial Seminar, which took place in Stockholm on the 12th of December 2003. The seminar was hosted by SKI. (au)

  10. Ensuring the Visibility and Traceability of Items through Logistics Chain of Automotive Industry Based on AutoEPCNet Using

    Directory of Open Access Journals (Sweden)

    Pavel Stasa

    2016-01-01

    Full Text Available Traceability in logistics is the capability of the participants to trace the products throughout the supply chain by means of either the product and/or container identifiers in a forward and/or backward direction. In today's competitive economic environment, traceability is a key concept related to all products and all types of supply chains. The goal of this paper is to describe development of application that enables to create and share information about the physical movement and status of products as they travel throughout the supply chain. The main purpose of this paper is to describe the development of RFID based track and trace system for ensuring the visibility and traceability of items in logistics chain especially in automotive industry. The proposed solution is based on EPCglobal Network Architecture.

  11. Characterisation of the IAEA-152 milk powder reference material for radioactivity with assigned values traceable to the SI units

    International Nuclear Information System (INIS)

    Altzitzoglou, T.; Bohnstedt, A.

    2008-01-01

    The Institute for Reference Materials and Measurements (IRMM) participated in a research project initiated by the International Atomic Energy Agency (IAEA) to upgrade some of its existing reference materials (RMs). The aim of the project is to improve the RM metrological status by establishing traceability of their assigned values to SI units. The purpose of the work described in this article was to establish traceability to the International System of Units (SI) of the activity concentrations of the radionuclides 134 Cs, 137 Cs, 40 K, and 90 Sr in the IAEA-152 milk powder RM. The choice of the particular RM was based on the concern about radioactivity levels in foodstuff. The sample preparation and the assaying of the activity concentrations in the milk powder, the methods used to achieve instrument calibrations and measurements traceable to the SI units, the data reduction and analysis, and finally, the results obtained are presented

  12. Mercury CEM Calibration

    Energy Technology Data Exchange (ETDEWEB)

    John F. Schabron; Joseph F. Rovani; Susan S. Sorini

    2007-03-31

    The Clean Air Mercury Rule (CAMR) which was published in the Federal Register on May 18, 2005, requires that calibration of mercury continuous emissions monitors (CEMs) be performed with NIST-traceable standards. Western Research Institute (WRI) is working closely with the Electric Power Research Institute (EPRI), the National Institute of Standards and Technology (NIST), and the Environmental Protection Agency (EPA) to facilitate the development of the experimental criteria for a NIST traceability protocol for dynamic elemental mercury vapor generators. The traceability protocol will be written by EPA. Traceability will be based on the actual analysis of the output of each calibration unit at several concentration levels ranging from about 2-40 ug/m{sup 3}, and this analysis will be directly traceable to analyses by NIST using isotope dilution inductively coupled plasma/mass spectrometry (ID ICP/MS) through a chain of analyses linking the calibration unit in the power plant to the NIST ID ICP/MS. Prior to this project, NIST did not provide a recommended mercury vapor pressure equation or list mercury vapor pressure in its vapor pressure database. The NIST Physical and Chemical Properties Division in Boulder, Colorado was subcontracted under this project to study the issue in detail and to recommend a mercury vapor pressure equation that the vendors of mercury vapor pressure calibration units can use to calculate the elemental mercury vapor concentration in an equilibrium chamber at a particular temperature. As part of this study, a preliminary evaluation of calibration units from five vendors was made. The work was performed by NIST in Gaithersburg, MD and Joe Rovani from WRI who traveled to NIST as a Visiting Scientist.

  13. A Liquid Deuterium Cold Neutron Source for the NIST Research Reactor - Conceptual Design

    International Nuclear Information System (INIS)

    Williams, R. E.; Middleton, M.; Kopetka, P.; Rowe, J. M.; Brand, P. C.

    2013-01-01

    The NBSR is a 20 MW research reactor operated by the NIST Center for Neutron Research (NCNR) as a neutron source providing beams of thermal and cold neutrons for research in materials science, fundamental physics and nuclear chemistry. A large, 550 mm diameter beam port was included in the design for the installation of a cold neutron source, and the NCNR has been steadily improving its cold neutron facilities for more than 25 years. Monte Carlo Simulations have shown that a liquid deuterium (LD 2 ) source will provide a gain of 1.5 to 2 for neutron wavelengths between 4 A and 10 A with respect to the existing liquid hydrogen cold source. The conceptual design for the LD 2 source will be presented. To achieve these gains, a large volume (35 litres) of LD 2 is required. The expected nuclear heat load in this moderator and vessel is 4000 W. A new, 7 kW helium refrigerator is being built to provide the necessary cooling capacity; it will be completely installed and tested early in 2014. The source will operate as a naturally circulating thermosiphon, very similar to the horizontal cold source in the High Flux Reactor at the Institut Laue-Langevin (ILL) in Grenoble. A condenser will be mounted on the reactor face about 2 m above the source providing the gravitational head to supply the source with LD 2 . The system will always be open to a 16 m3 ballast tank to store the deuterium at 500 kPa when the refrigerator is not operating, and providing a passively safe response to a refrigerator trip. It is expected the source will operate at 23 K, the boiling point of LD 2 at 100 kPa. All components will be surrounded by a blanket of helium to prevent the possibility of creating a flammable mixture of deuterium and air. A design for the cryostat assembly, consisting of the moderator chamber, vacuum jacket, helium containment and a heavy water cooling water jacket, has been completed and sent to procurement to solicit bids. It is expected that installation of the LD 2 cold

  14. A Liquid Deuterium Cold Neutron Source for the NIST Research Reactor - Conceptual Design

    Energy Technology Data Exchange (ETDEWEB)

    Williams, R. E.; Middleton, M.; Kopetka, P.; Rowe, J. M.; Brand, P. C. [NIST Center for Neutron Research, Gaithersburg (United States)

    2013-07-01

    The NBSR is a 20 MW research reactor operated by the NIST Center for Neutron Research (NCNR) as a neutron source providing beams of thermal and cold neutrons for research in materials science, fundamental physics and nuclear chemistry. A large, 550 mm diameter beam port was included in the design for the installation of a cold neutron source, and the NCNR has been steadily improving its cold neutron facilities for more than 25 years. Monte Carlo Simulations have shown that a liquid deuterium (LD{sub 2}) source will provide a gain of 1.5 to 2 for neutron wavelengths between 4 A and 10 A with respect to the existing liquid hydrogen cold source. The conceptual design for the LD{sub 2} source will be presented. To achieve these gains, a large volume (35 litres) of LD{sub 2} is required. The expected nuclear heat load in this moderator and vessel is 4000 W. A new, 7 kW helium refrigerator is being built to provide the necessary cooling capacity; it will be completely installed and tested early in 2014. The source will operate as a naturally circulating thermosiphon, very similar to the horizontal cold source in the High Flux Reactor at the Institut Laue-Langevin (ILL) in Grenoble. A condenser will be mounted on the reactor face about 2 m above the source providing the gravitational head to supply the source with LD{sub 2}. The system will always be open to a 16 m3 ballast tank to store the deuterium at 500 kPa when the refrigerator is not operating, and providing a passively safe response to a refrigerator trip. It is expected the source will operate at 23 K, the boiling point of LD{sub 2} at 100 kPa. All components will be surrounded by a blanket of helium to prevent the possibility of creating a flammable mixture of deuterium and air. A design for the cryostat assembly, consisting of the moderator chamber, vacuum jacket, helium containment and a heavy water cooling water jacket, has been completed and sent to procurement to solicit bids. It is expected that

  15. Chemometrics Methods for Specificity, Authenticity and Traceability Analysis of Olive Oils: Principles, Classifications and Applications

    Directory of Open Access Journals (Sweden)

    Habib Messai

    2016-11-01

    Full Text Available Background. Olive oils (OOs show high chemical variability due to several factors of genetic, environmental and anthropic types. Genetic and environmental factors are responsible for natural compositions and polymorphic diversification resulting in different varietal patterns and phenotypes. Anthropic factors, however, are at the origin of different blends’ preparation leading to normative, labelled or adulterated commercial products. Control of complex OO samples requires their (i characterization by specific markers; (ii authentication by fingerprint patterns; and (iii monitoring by traceability analysis. Methods. These quality control and management aims require the use of several multivariate statistical tools: specificity highlighting requires ordination methods; authentication checking calls for classification and pattern recognition methods; traceability analysis implies the use of network-based approaches able to separate or extract mixed information and memorized signals from complex matrices. Results. This chapter presents a review of different chemometrics methods applied for the control of OO variability from metabolic and physical-chemical measured characteristics. The different chemometrics methods are illustrated by different study cases on monovarietal and blended OO originated from different countries. Conclusion. Chemometrics tools offer multiple ways for quantitative evaluations and qualitative control of complex chemical variability of OO in relation to several intrinsic and extrinsic factors.

  16. Traceability System for Improved Utilization of Solid Biofuel from Agricultural Prunings

    Directory of Open Access Journals (Sweden)

    Techane Bosona

    2018-01-01

    Full Text Available Biomass production and supply for renewable energy generation should be managed well and carried out in a sustainable manner. An effective traceability system (TS is required to provide sufficient information and assure the quality of the biomass. The objective of this study is to define and develop a TS to assure the pruning biomass quality for the production of solid biofuels and to provide guarantee to the final user that the biomass is in good condition according to recommended quality criteria. It is designed for an agricultural pruning supply chain in which farmers, biomass traders, transporters, and end users are major actors. It is based on the biofuel quality requirements required by final users and other standards such as the new European standards EN 14961-1, EN15234:1-2011, and EN14961-1:2010, which describe solid fuel quality parameters. Traceable quality parameters include origin and source of product, traded form, bale dimension, chips size distribution, moisture content, ash content, and density of biomass. In this TS, a unique product label is introduced and integrated into a smart logistics system (SLS. The TS uses information captured at different stages of the product supply chain. It enables the management of the whole pruning biomass supply chain with the support of a centralized web-based information platform, an integral part of the SLS.

  17. Traceable calibration for a digital real-time oscilloscope with time interleaving architecture

    Science.gov (United States)

    Kim, Dongju; Lee, Joo-Gwang; Lee, Dong-Joon; Cho, Chihyun

    2018-01-01

    Impairments of analog-to-digital converters (ADCs) used in digital real-time oscilloscopes (DRTO) have caused inevitable signal distortions in measurements. To calibrate these errors with traceability, we propose a novel method that consists of two steps. First, each transfer function of the ADCs is measured using pulse trains from a photodiode calibrated up to 110 GHz. Each data set of the ADCs is superimposed to convert the repetitive pulse to a single pulse to solve the under-sampling problem of the separated data depending on each ADC. Then, the signals of the device under test (DUT) are also separated and superimposed depending on the ADCs, and they are calibrated in the frequency domain based on the measured transfer functions. After a calibration process, the data set is reconverted to the time domain to achieve traceable calibration. To verify our method, we have measured the output of another 70 GHz photodiode with a calibrated DRTO. In terms of results, time-interleaved errors are suppressed by more than 24 dB up to the bandwidth of the DRTO.

  18. Improving integrity of on-line grammage measurement with traceable basic calibration.

    Science.gov (United States)

    Kangasrääsiö, Juha

    2010-07-01

    The automatic control of grammage (basis weight) in paper and board production is based upon on-line grammage measurement. Furthermore, the automatic control of other quality variables such as moisture, ash content and coat weight, may rely on the grammage measurement. The integrity of Kr-85 based on-line grammage measurement systems was studied, by performing basic calibrations with traceably calibrated plastic reference standards. The calibrations were performed according to the EN ISO/IEC 17025 standard, which is a requirement for calibration laboratories. The observed relative measurement errors were 3.3% in the first time calibrations at the 95% confidence level. With the traceable basic calibration method, however, these errors can be reduced to under 0.5%, thus improving the integrity of on-line grammage measurements. Also a standardised algorithm, based on the experience from the performed calibrations, is proposed to ease the adjustment of the different grammage measurement systems. The calibration technique can basically be applied to all beta-radiation based grammage measurements. 2010 ISA. Published by Elsevier Ltd. All rights reserved.

  19. Metrologically Traceable Determination of the Water Content in Biopolymers: INRiM Activity

    Science.gov (United States)

    Rolle, F.; Beltramino, G.; Fernicola, V.; Sega, M.; Verdoja, A.

    2017-03-01

    Water content in materials is a key factor affecting many chemical and physical properties. In polymers of biological origin, it influences their stability and mechanical properties as well as their biodegradability. The present work describes the activity carried out at INRiM on the determination of water content in samples of a commercial starch-derived biopolymer widely used in shopping bags (Mater-Bi^{circledR }). Its water content, together with temperature, is the most influencing parameter affecting its biodegradability, because of the considerable impact on the microbial activity which is responsible for the biopolymer degradation in the environment. The main scope of the work was the establishment of a metrologically traceable procedure for the determination of water content by using two electrochemical methods, namely coulometric Karl Fischer (cKF) titration and evolved water vapour (EWV) analysis. The obtained results are presented. The most significant operational parameters were considered, and a particular attention was devoted to the establishment of metrological traceability of the measurement results by using appropriate calibration procedures, calibrated standards and suitable certified reference materials. Sample homogeneity and oven-drying temperature were found to be the most important influence quantities in the whole water content measurement process. The results of the two methods were in agreement within the stated uncertainties. Further development is foreseen for the application of cKF and EWV to other polymers.

  20. Proposal of traceability chain for direct measurements of radioactive contamination in Cuba

    International Nuclear Information System (INIS)

    Walwyn Salas, Gonzalo; Tamayo Garcia, Jose A.; Cornejo Diaz, Nestor

    2008-01-01

    The measurements of the radioactive surface contamination are common used to demonstrate the compliance with safety regulations at national level. It is mandatory that those measurements are traceable to national standards through the suitable calibration of the monitors used for survey. In Cuba, there is not a harmonized methodology for evaluation of contamination from direct measurements and no standardized calibration service for portable monitors is routinely provided to users. The Secondary Standard Dosimetry Laboratory of Cuba has recently established the calibration service of contamination monitors in terms of instrument efficiency using the reference sources of known emission rate per unit area in accordance with international normative ISO 8769. In the present paper, is proposed a traceable scheme of direct measurements of contamination that involve the calibration at the laboratory level using multi-source method and the evaluation of contaminations at user level in terms of activity per unit area. Some improvements from the previous single-source method of calibration are explained in order to support the advantages that offer the new chain for those measurements in the country. (author)

  1. Traceability and Quality Control in Traditional Chinese Medicine: From Chemical Fingerprint to Two-Dimensional Barcode

    Directory of Open Access Journals (Sweden)

    Yong Cai

    2015-01-01

    Full Text Available Chemical fingerprinting is currently a widely used tool that enables rapid and accurate quality evaluation of Traditional Chinese Medicine (TCM. However, chemical fingerprints are not amenable to information storage, recognition, and retrieval, which limit their use in Chinese medicine traceability. In this study, samples of three kinds of Chinese medicines were randomly selected and chemical fingerprints were then constructed by using high performance liquid chromatography. Based on chemical data, the process of converting the TCM chemical fingerprint into two-dimensional code is presented; preprocess and filtering algorithm are also proposed aiming at standardizing the large amount of original raw data. In order to know which type of two-dimensional code (2D is suitable for storing data of chemical fingerprints, current popular types of 2D codes are analyzed and compared. Results show that QR Code is suitable for recording the TCM chemical fingerprint. The fingerprint information of TCM can be converted into data format that can be stored as 2D code for traceability and quality control.

  2. Recent developments in application of stable isotope analysis on agro-product authenticity and traceability.

    Science.gov (United States)

    Zhao, Yan; Zhang, Bin; Chen, Gang; Chen, Ailiang; Yang, Shuming; Ye, Zhihua

    2014-02-15

    With the globalisation of agro-product markets and convenient transportation of food across countries and continents, the potential for distribution of mis-labelled products increases accordingly, highlighting the need for measures to identify the origin of food. High quality food with identified geographic origin is a concern not only for consumers, but also for agriculture farmers, retailers and administrative authorities. Currently, stable isotope ratio analysis in combination with other chemical methods gradually becomes a promising approach for agro-product authenticity and traceability. In the last five years, a growing number of research papers have been published on tracing agro-products by stable isotope ratio analysis and techniques combining with other instruments. In these reports, the global variety of stable isotope compositions has been investigated, including light elements such as C, N, H, O and S, and heavy isotopes variation such as Sr and B. Several factors also have been considered, including the latitude, altitude, evaporation and climate conditions. In the present paper, an overview is provided on the authenticity and traceability of the agro-products from both animal and plant sources by stable isotope ratio analysis. Copyright © 2013 Elsevier Ltd. All rights reserved.

  3. PGI chicory (Cichorium intybus L.) traceability by means of HRMAS-NMR spectroscopy: a preliminary study.

    Science.gov (United States)

    Ritota, Mena; Casciani, Lorena; Valentini, Massimiliano

    2013-05-01

    Analytical traceability of PGI and PDO foods (Protected Geographical Indication and Protected Denomination Origin respectively) is one of the most challenging tasks of current applied research. Here we proposed a metabolomic approach based on the combination of (1)H high-resolution magic angle spinning-nuclear magnetic resonance (HRMAS-NMR) spectroscopy with multivariate analysis, i.e. PLS-DA, as a reliable tool for the traceability of Italian PGI chicories (Cichorium intybus L.), i.e. Radicchio Rosso di Treviso and Radicchio Variegato di Castelfranco, also known as red and red-spotted, respectively. The metabolic profile was gained by means of HRMAS-NMR, and multivariate data analysis allowed us to build statistical models capable of providing clear discrimination among the two varieties and classification according to the geographical origin. Based on Variable Importance in Projection values, the molecular markers for classifying the different types of red chicories analysed were found accounting for both the cultivar and the place of origin. © 2012 Society of Chemical Industry.

  4. Chemometrics Methods for Specificity, Authenticity and Traceability Analysis of Olive Oils: Principles, Classifications and Applications

    Science.gov (United States)

    Messai, Habib; Farman, Muhammad; Sarraj-Laabidi, Abir; Hammami-Semmar, Asma; Semmar, Nabil

    2016-01-01

    Background. Olive oils (OOs) show high chemical variability due to several factors of genetic, environmental and anthropic types. Genetic and environmental factors are responsible for natural compositions and polymorphic diversification resulting in different varietal patterns and phenotypes. Anthropic factors, however, are at the origin of different blends’ preparation leading to normative, labelled or adulterated commercial products. Control of complex OO samples requires their (i) characterization by specific markers; (ii) authentication by fingerprint patterns; and (iii) monitoring by traceability analysis. Methods. These quality control and management aims require the use of several multivariate statistical tools: specificity highlighting requires ordination methods; authentication checking calls for classification and pattern recognition methods; traceability analysis implies the use of network-based approaches able to separate or extract mixed information and memorized signals from complex matrices. Results. This chapter presents a review of different chemometrics methods applied for the control of OO variability from metabolic and physical-chemical measured characteristics. The different chemometrics methods are illustrated by different study cases on monovarietal and blended OO originated from different countries. Conclusion. Chemometrics tools offer multiple ways for quantitative evaluations and qualitative control of complex chemical variability of OO in relation to several intrinsic and extrinsic factors. PMID:28231172

  5. Authenticity and traceability of vanilla flavors by analysis of stable isotopes of carbon and hydrogen.

    Science.gov (United States)

    Hansen, Anne-Mette Sølvbjerg; Fromberg, Arvid; Frandsen, Henrik Lauritz

    2014-10-22

    Authenticity and traceability of vanilla flavors were investigated using gas chromatography-isotope ratio mass spectrometry (GC-IRMS). Vanilla flavors produced by chemical synthesis (n = 2), fermentation (n = 1), and extracted from two different species of the vanilla orchid (n = 79) were analyzed. The authenticity of the flavor compound vanillin was evaluated on the basis of measurements of ratios of carbon stable isotopes (δ(13)C). It was found that results of δ(13)C for vanillin extracted from Vanilla planifolia and Vanilla tahitensis were significantly different (t test) and that it was possible to differentiate these two groups of natural vanillin from vanillin produced otherwise. Vanilla flavors were also analyzed for ratios of hydrogen stable isotopes (δ(2)H). A graphic representation of δ(13)C versus δ(2)H revealed that vanillin extracted from pods grown in adjacent geographic origins grouped together. Accordingly, values of δ(13)C and δ(2)H can be used for studies of authenticity and traceability of vanilla flavors.

  6. Traceability of 'Limone di Siracusa PGI' by a multidisciplinary analytical and chemometric approach.

    Science.gov (United States)

    Amenta, M; Fabroni, S; Costa, C; Rapisarda, P

    2016-11-15

    Food traceability is increasingly relevant with respect to safety, quality and typicality issues. Lemon fruits grown in a typical lemon-growing area of southern Italy (Siracusa), have been awarded the PGI (Protected Geographical Indication) recognition as 'Limone di Siracusa'. Due to its peculiarity, consumers have an increasing interest about this product. The detection of potential fraud could be improved by using the tools linking the composition of this production to its typical features. This study used a wide range of analytical techniques, including conventional techniques and analytical approaches, such as spectral (NIR spectra), multi-elemental (Fe, Zn, Mn, Cu, Li, Sr) and isotopic ((13)C/(12)C, (18)O/(16)O) marker investigations, joined with multivariate statistical analysis, such as PLS-DA (Partial Least Squares Discriminant Analysis) and LDA (Linear Discriminant Analysis), to implement a traceability system to verify the authenticity of 'Limone di Siracusa' production. The results demonstrated a very good geographical discrimination rate. Copyright © 2016 Elsevier Ltd. All rights reserved.

  7. DYNAMIC MODEL FOR THE ECONOMIC EVALUATION OF THE TRACEABILITY OF MEXICAN BEEF MARKET

    Directory of Open Access Journals (Sweden)

    Lucila Herrera Ayala

    2013-12-01

    Full Text Available In order to point out the importance of the implementation of a traceability system in economic terms in the beef meat production activity, for the 2011-2016 period, a dynamic model was created in order to estimate the real value of the cattle inventory and to make projections of the gains and losses obtained in the implementation or not of this system with two possible plausible scenarios that affect the exports and imports. The results indicate that if the exports were increased by 53%, just like it happened in Uruguay with the implementation of this system, gains would increase 8.21% in the yearly average. In the absence of this system and considering the 80% decrease of the exports in the United States, in the presence of the Bovine Spongiform Encephalopathy (BSE losses would increase 9.97% in a yearly average. In both scenarios a change ± of 20% in the imports was considered. Due to the results obtained and in the face of foreseeable conduct of trade, the cost of opportunity of a traceability system results positive.

  8. Radiometric inter-sensor cross-calibration uncertainty using a traceable high accuracy reference hyperspectral imager

    Science.gov (United States)

    Gorroño, Javier; Banks, Andrew C.; Fox, Nigel P.; Underwood, Craig

    2017-08-01

    Optical earth observation (EO) satellite sensors generally suffer from drifts and biases relative to their pre-launch calibration, caused by launch and/or time in the space environment. This places a severe limitation on the fundamental reliability and accuracy that can be assigned to satellite derived information, and is particularly critical for long time base studies for climate change and enabling interoperability and Analysis Ready Data. The proposed TRUTHS (Traceable Radiometry Underpinning Terrestrial and Helio-Studies) mission is explicitly designed to address this issue through re-calibrating itself directly to a primary standard of the international system of units (SI) in-orbit and then through the extension of this SI-traceability to other sensors through in-flight cross-calibration using a selection of Committee on Earth Observation Satellites (CEOS) recommended test sites. Where the characteristics of the sensor under test allows, this will result in a significant improvement in accuracy. This paper describes a set of tools, algorithms and methodologies that have been developed and used in order to estimate the radiometric uncertainty achievable for an indicative target sensor through in-flight cross-calibration using a well-calibrated hyperspectral SI-traceable reference sensor with observational characteristics such as TRUTHS. In this study, Multi-Spectral Imager (MSI) of Sentinel-2 and Landsat-8 Operational Land Imager (OLI) is evaluated as an example, however the analysis is readily translatable to larger-footprint sensors such as Sentinel-3 Ocean and Land Colour Instrument (OLCI) and Visible Infrared Imaging Radiometer Suite (VIIRS). This study considers the criticality of the instrumental and observational characteristics on pixel level reflectance factors, within a defined spatial region of interest (ROI) within the target site. It quantifies the main uncertainty contributors in the spectral, spatial, and temporal domains. The resultant tool

  9. RELAP-7 Software Verification and Validation Plan: Requirements Traceability Matrix (RTM) Part 1 – Physics and numerical methods

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Yong Joon [Idaho National Lab. (INL), Idaho Falls, ID (United States); Yoo, Jun Soo [Idaho National Lab. (INL), Idaho Falls, ID (United States); Smith, Curtis Lee [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2015-09-01

    This INL plan comprehensively describes the Requirements Traceability Matrix (RTM) on main physics and numerical method of the RELAP-7. The plan also describes the testing-based software verification and validation (SV&V) process—a set of specially designed software models used to test RELAP-7.

  10. Norman-based Isolated Data Systems allows users to surf the Internet with no traceable IP address

    CERN Multimedia

    2004-01-01

    "Patented by Norman-based Isolated Data Systems, John Doe is an anonymous proxy server that allows users to surf the Internet exactly as before, with one exception - they are identifiable only as John Doe, with no traceable IP address, which means no tracking, no identification and no profile building" ( 1/2 page)

  11. Selection and use of microsatellite markers for individual identification and meat traceability of six swine breeds in the Chinese market.

    Science.gov (United States)

    Zhao, Jie; Li, Tingting; Zhu, Chao; Jiang, Xiaoling; Zhao, Yan; Xu, Zhenzhen; Yang, Shuming; Chen, Ailiang

    2018-06-01

    Meat traceability based on molecular markers is exerting a great influence on food safety and will enhance its key role in the future. This study aimed to investigate and verify the polymorphism of 23 microsatellite markers and select the most suitable markers for individual identification and meat traceability of six swine breeds in the Chinese market. The mean polymorphism information content value of these 23 loci was 0.7851, and each locus exhibited high polymorphism in the pooled population. There were 10 loci showing good polymorphism in each breed, namely, Sw632, S0155, Sw2406, Sw830, Sw2525, Sw72, Sw2448, Sw911, Sw122 and CGA. When six highly polymorphic loci were combined, the match probability value for two random individual genotypes among the pig breeds (Beijing Black, Sanyuan and Taihu) was lower than 1.151 E-06. An increasing number of loci indicated a gradually decreasing match probability value and therefore enhanced traceability accuracy. The validation results of tracing 18 blood and corresponding meat samples based on five highly polymorphic loci (Sw2525, S0005, Sw0107, Sw911 and Sw857) were successful, with 100% conformation probability, which provided a foundation for establishing a traceability system for pork in the Chinese market.

  12. Primary standardization of {sup 152}Eu by 4πβ(LS) - γ (NaI) coincidence counting and CIEMAT-NIST method

    Energy Technology Data Exchange (ETDEWEB)

    Ruzzarin, A., E-mail: aruzzarin@nuclear.ufrj.br [Coordenacao de Pos-Graduacao e Pesquisa de Engenharia (LIN/PEN/COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Lab. de Instrumentação Nuclear; Cruz, P.A.L. da; Ferreira Filho, A.L.; Iwahara, A. [Instituto de Radioproteção e Dosimetria (LNMRI/IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil). Lab. Nacional de Metrologia das Radiações Ionizantes

    2017-07-01

    The 4πβ-γ coincidence counting and CIEMAT/NIST liquid scintillation method were used in the standardization of a solution of {sup 152}Eu. In CIEMAT/NIST method, measurements were performed in a Liquid Scintillation Counter model Wallac 1414. In the 4πβ-γ coincidence counting, the solution was standardized using a coincidence method with 'beta-efficiency extrapolation'. A simple 4πβ-γ coincidence system was used, with acrylic scintillation cell coupled to two coincident photomultipliers at 180° each other and NaI(Tl) detector. The activity concentrations obtained were 156.934 ± 0.722 and 157.403 ± 0.113 kBq/g, respectively, for CIEMAT/NIST and 4πβ-γ coincidence counting measurement methods. (author)

  13. Practical aspects of the uncertainty and traceability of spectrochemical measurement results by electrothermal atomic absorption spectrometry

    International Nuclear Information System (INIS)

    Duta, S.; Robouch, P.; Barbu, L.; Taylor, P.

    2007-01-01

    The determination of trace elements concentration in water by electrothermal atomic absorption spectrometry (ETAAS) is a common and well established technique in many chemical testing laboratories. However, the evaluation of measurement uncertainty results is not systematically implemented. The paper presents an easy step-by-step example leading to the evaluation of the combined standard uncertainty of copper determination in water using ETAAS. The major contributors to the overall measurement uncertainty are identified due to amount of copper in water sample that mainly depends on the absorbance measurements, due to certified reference material and due to auto-sampler volume measurements. The practical aspects how the traceability of copper concentration in water can be established and demonstrated are also pointed out

  14. Practical aspects of the uncertainty and traceability of spectrochemical measurement results by electrothermal atomic absorption spectrometry

    Energy Technology Data Exchange (ETDEWEB)

    Duta, S. [Institute for Reference Materials and Measurements, Joint Research Centre, European Commission, Retieseweg 111, B-2440 Geel (Belgium); National Institute of Metrology, 042122 Vitan Barzesti 11, sector 4 Bucharest (Romania)], E-mail: steluta.duta@inm.ro; Robouch, P. [Institute for Reference Materials and Measurements, Joint Research Centre, European Commission, Retieseweg 111, B-2440 Geel (Belgium)], E-mail: Piotr.Robouch@ec.europa.eu; Barbu, L. [Coca-Cola Entreprise, Analytical Department, Bucharest (Romania); Taylor, P. [Institute for Reference Materials and Measurements, Joint Research Centre, European Commission, Retieseweg 111, B-2440 Geel (Belgium)], E-mail: Philip.Taylor@ec.europa.eu

    2007-04-15

    The determination of trace elements concentration in water by electrothermal atomic absorption spectrometry (ETAAS) is a common and well established technique in many chemical testing laboratories. However, the evaluation of measurement uncertainty results is not systematically implemented. The paper presents an easy step-by-step example leading to the evaluation of the combined standard uncertainty of copper determination in water using ETAAS. The major contributors to the overall measurement uncertainty are identified due to amount of copper in water sample that mainly depends on the absorbance measurements, due to certified reference material and due to auto-sampler volume measurements. The practical aspects how the traceability of copper concentration in water can be established and demonstrated are also pointed out.

  15. Determination of radionuclides in environmental test items at CPHR: traceability and uncertainty calculation.

    Science.gov (United States)

    Carrazana González, J; Fernández, I M; Capote Ferrera, E; Rodríguez Castro, G

    2008-11-01

    Information about how the laboratory of Centro de Protección e Higiene de las Radiaciones (CPHR), Cuba establishes its traceability to the International System of Units for the measurement of radionuclides in environmental test items is presented. A comparison among different methodologies of uncertainty calculation, including an analysis of the feasibility of using the Kragten-spreadsheet approach, is shown. In the specific case of the gamma spectrometric assay, the influence of each parameter, and the identification of the major contributor, in the relative difference between the methods of uncertainty calculation (Kragten and partial derivative) is described. The reliability of the uncertainty calculation results reported by the commercial software Gamma 2000 from Silena is analyzed.

  16. Determination of radionuclides in environmental test items at CPHR: Traceability and uncertainty calculation

    International Nuclear Information System (INIS)

    Carrazana Gonzalez, J.; Fernandez, I.M.; Capote Ferrera, E.; Rodriguez Castro, G.

    2008-01-01

    Information about how the laboratory of Centro de Proteccion e Higiene de las Radiaciones (CPHR), Cuba establishes its traceability to the International System of Units for the measurement of radionuclides in environmental test items is presented. A comparison among different methodologies of uncertainty calculation, including an analysis of the feasibility of using the Kragten-spreadsheet approach, is shown. In the specific case of the gamma spectrometric assay, the influence of each parameter, and the identification of the major contributor, in the relative difference between the methods of uncertainty calculation (Kragten and partial derivative) is described. The reliability of the uncertainty calculation results reported by the commercial software Gamma 2000 from Silena is analyzed

  17. New Primary Standards for Establishing SI Traceability for Moisture Measurements in Solid Materials

    Science.gov (United States)

    Heinonen, M.; Bell, S.; Choi, B. Il; Cortellessa, G.; Fernicola, V.; Georgin, E.; Hudoklin, D.; Ionescu, G. V.; Ismail, N.; Keawprasert, T.; Krasheninina, M.; Aro, R.; Nielsen, J.; Oğuz Aytekin, S.; Österberg, P.; Skabar, J.; Strnad, R.

    2018-01-01

    A European research project METefnet addresses a fundamental obstacle to improving energy-intensive drying process control: due to ambiguous reference analysis methods and insufficient methods for estimating uncertainty in moisture measurements, the achievable accuracy in the past was limited and measurement uncertainties were largely unknown. This paper reports the developments in METefnet that provide a sound basis for the SI traceability: four new primary standards for realizing the water mass fraction were set up, analyzed and compared to each other. The operation of these standards is based on combining sample weighing with different water vapor detection techniques: cold trap, chilled mirror, electrolytic and coulometric Karl Fischer titration. The results show that an equivalence of 0.2 % has been achieved between the water mass fraction realizations and that the developed methods are applicable to a wide range of materials.

  18. A novel reliable method of DNA extraction from olive oil suitable for molecular traceability.

    Science.gov (United States)

    Raieta, Katia; Muccillo, Livio; Colantuoni, Vittorio

    2015-04-01

    Extra virgin olive oil production has a worldwide economic impact. The use of this brand, however, is of great concern to Institutions and private industries because of the increasing number of fraud and adulteration attempts to the market products. Here, we present a novel, reliable and not expensive method for extracting the DNA from commercial virgin and extra virgin olive oils. The DNA is stable overtime and amenable for molecular analyses; in fact, by carrying out simple sequence repeats (SSRs) markers analysis, we characterise the genetic profile of monovarietal olive oils. By comparing the oil-derived pattern with that of the corresponding tree, we can unambiguously identify four cultivars from Samnium, a region of Southern Italy, and distinguish them from reference and more widely used varieties. Through a parentage statistical analysis, we also identify the putative pollinators, establishing an unprecedented and powerful tool for olive oil traceability. Copyright © 2014 Elsevier Ltd. All rights reserved.

  19. Role of Lanthanides in the Traceability of the Milk Production Chain.

    Science.gov (United States)

    Aceto, Maurizio; Musso, Davide; Calà, Elisa; Arieri, Fabio; Oddone, Matteo

    2017-05-24

    The traceability and authentication of milk were studied using trace and ultratrace elements as chemical markers. Among these variables, the group of lanthanides resulted in being particularly useful for this purpose as a result of their homogeneous distribution inside milk, which showed on the contrary to be intrinsically inhomogeneous from the elemental point of view. Using in this pilot study milk samples from a factory in Piedmont (Italy), we demonstrated that the distribution of lanthanides can be used as a fingerprint to put into relation the soil of the pasture land on which cows graze and the bottled milk produced in the factory. In fact, the distribution is maintained nearly unaltered along the production chain of milk, apart from the passage into the stomachs of the cows. Using the same variables, it was possible to discriminate between milk produced in the factory and milk samples taken from the large-scale retail trade.

  20. Integrity of nuclear genomic deoxyribonucleic acid in cooked meat: Implications for food traceability.

    Science.gov (United States)

    Aslan, O; Hamill, R M; Sweeney, T; Reardon, W; Mullen, A M

    2009-01-01

    It is essential to isolate high-quality DNA from muscle tissue for PCR-based applications in traceability of animal origin. We wished to examine the impact of cooking meat to a range of core temperatures on the quality and quantity of subsequently isolated genomic (specifically, nuclear) DNA. Triplicate steak samples were cooked in a water bath (100 degrees C) until their final internal temperature was 75, 80, 85, 90, 95, or 100 degrees C, and DNA was extracted. Deoxyribonucleic acid quantity was significantly reduced in cooked meat samples compared with raw (6.5 vs. 56.6 ng/microL; P 800 bp) were observed only when using DNA from raw meat and steak cooked to lower core temperatures. Small amplicons (food authentication, it is less abundant, and results suggest that analyses should be designed to use small amplicon sizes for meat cooked to high core temperatures.

  1. DNA markers as a tool for genetic traceability of primary product in agri-food chains

    Directory of Open Access Journals (Sweden)

    Daria Scarano

    2012-11-01

    Full Text Available The agri-food components of the Made in Italy are well known all over the world, therefore they may significantly contribute to the Italian economy. However, also owing to a large number of cases of improper labelling, the Italian agro-food industry faces an ever-increasing competition. For this reason, there is a decline of consumers’ confidence towards food production systems and safety controls. To prevent erroneous classification of products and to protect consumers from false instore information, it is important to develop and validate techniques that are able to detect mislabelling at any stage of the food-chain. This paper describes some examples of genetic traceability of primary products in some important plant food chains such as durum wheat, olive and tomato, based on DNA analysis both of raw material and of processed food (pasta, olive oil, and peeled tomato.

  2. Perceived Traceability Costs and Benefits in the Italian Fisheries Supply Chain

    Directory of Open Access Journals (Sweden)

    Daniele Asioli

    2012-03-01

    Full Text Available The paper proposes a model in which it is hypothesized that firm characteristics influence both costs and benefits of traceability. The proposed model differentiates between aggregate measures and specific categories, as well as between expected costs and benefits on the one hand and perceived actual outcomes on the other, and is tested in a series of regression analyses based on a survey sample of 60 Italian fish processors. The findings indicate that firm characteristics are not strongly associated with any specific cost or benefit measure. However, expected overall benefits are highly significantly impacted by firm size and the number of quality management systems certified, while actual overall benefits only by firm size. Finally, the study also finds considerable discrepancies between expected and actual costs and benefits. The managerial implications of the findings are discussed.

  3. Towards a traceable clinical guidelines application. A model-driven approach.

    Science.gov (United States)

    Domínguez, E; Pérez, B; Zapata, M

    2010-01-01

    The goal of this research is to provide an overall framework to enable model-based development of clinical guideline-based decision support systems (GBDSSs). The automatically generated GBDSSs are aimed at providing guided support to the physician during the application of guidelines and automatically storing guideline application data for traceability purposes. The development process of a GBDSS for a guideline is based on model-driven development (MDD) techniques which allow us to carry out such a process automatically, making development more agile and saving on human resource costs. We use UML Statecharts to represent the dynamics of guidelines and, based on this model, we use a MDD-based tool chain to generate the guideline-dependent components of each GBDSS in an automatic way. In particular, as for the traceability capabilities of each GBDSS, MDD techniques are combined with database schema mappings for metadata management in order to automatically generate the GBDSS-persistent component as one of the main contributions of this paper. The complete framework has been implemented as an Eclipse plug-in named GBDSSGenerator which, starting from the statechart representing a guideline, allows the development process to be carried out automatically by only selecting different menu options the plug-in provides. We have successfully validated our overall approach by generating the GBDSS for different types of clinical guidelines, even for laboratory guidelines. The proposed framework allows the development of clinical guideline-based decision support systems in an automatic way making this process more agile and saving on human resource costs.

  4. Piloting a livestock identification and traceability system in the northern Tanzania-Narok-Nairobi trade route.

    Science.gov (United States)

    Mutua, Florence; Kihara, Absolomon; Rogena, Jason; Ngwili, Nicholas; Aboge, Gabriel; Wabacha, James; Bett, Bernard

    2018-02-01

    We designed and piloted a livestock identification and traceability system (LITS) along the Northern Tanzania-Narok-Nairobi beef value chain. Animals were randomly selected and identified at the primary markets using uniquely coded ear tags. Data on identification, ownership, source (village), and the site of recruitment (primary market) were collected and posted to an online database. Similar data were collected in all the markets where tagged animals passed through until they got to defined slaughterhouses. Meat samples were collected during slaughter and later analyzed for tetracycline and diminazene residues using high-performance liquid chromatography (HPLC). Follow up surveys were done to assess the pilot system. The database captured a total of 4260 records from 741 cattle. Cattle recruited in the primary markets in Narok (n = 1698) either came from farms (43.8%), local markets (37.7%), or from markets in Tanzania (18.5%). Soit Sambu market was the main source of animals entering the market from Tanzania (54%; n = 370). Most tagged cattle (72%, n = 197) were slaughtered at the Ewaso Ng'iro slaughterhouse in Narok. Lesions observed (5%; n = 192) were related to either hydatidosis or fascioliasis. The mean diminazene aceturate residue level was 320.78 ± 193.48 ppb. We used the traceability system to identify sources of animals with observable high drug residue levels in tissues. Based on the findings from this study, we discuss opportunities for LITS-as a tool for surveillance for both animal health and food safety, and outline challenges of its deployment in a local beef value chain-such as limited incentives for uptake.

  5. Electric field metrology for SI traceability: Systematic measurement uncertainties in electromagnetically induced transparency in atomic vapor

    Science.gov (United States)

    Holloway, Christopher L.; Simons, Matt T.; Gordon, Joshua A.; Dienstfrey, Andrew; Anderson, David A.; Raithel, Georg

    2017-06-01

    We investigate the relationship between the Rabi frequency (ΩRF, related to the applied electric field) and Autler-Townes (AT) splitting, when performing atom-based radio-frequency (RF) electric (E) field strength measurements using Rydberg states and electromagnetically induced transparency (EIT) in an atomic vapor. The AT splitting satisfies, under certain conditions, a well-defined linear relationship with the applied RF field amplitude. The EIT/AT-based E-field measurement approach derived from these principles is currently being investigated by several groups around the world as a means to develop a new SI-traceable RF E-field measurement technique. We establish conditions under which the measured AT-splitting is an approximately linear function of the RF electric field. A quantitative description of systematic deviations from the linear relationship is key to exploiting EIT/AT-based atomic-vapor spectroscopy for SI-traceable field measurement. We show that the linear relationship is valid and can be used to determine the E-field strength, with minimal error, as long as the EIT linewidth is small compared to the AT-splitting. We also discuss interesting aspects of the thermal dependence (i.e., hot- versus cold-atom) of this EIT-AT technique. An analysis of the transition from cold- to hot-atom EIT in a Doppler-mismatched cascade system reveals a significant change of the dependence of the EIT linewidth on the optical Rabi frequencies and of the AT-splitting on ΩRF.

  6. 75 FR 14565 - NIST Summer Institute for Middle School Science Teachers; Availability of Funds

    Science.gov (United States)

    2010-03-26

    ... areas of science, technology, engineering and mathematics (STEM) at the middle school level (grades 6-8... encourage them to inspire students to pursue careers in STEM fields. DATES: Proposals must be received at... educational institutions that are teaching students in the areas of Science, Technology, Engineering and...

  7. Experimental characterization of the Advanced Liquid Hydrogen Cold Neutron Source spectrum of the NBSR reactor at the NIST Center for Neutron Research

    Energy Technology Data Exchange (ETDEWEB)

    Cook, J.C.; Barker, J.G.; Rowe, J.M.; Williams, R.E. [NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 6100, Gaithersburg, MD 20899-6100 (United States); Gagnon, C. [Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742 (United States); Lindstrom, R.M. [Scientist Emeritus, Chemical Sciences Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8395, Gaithersburg, MD 20899-8395 (United States); Ibberson, R.M.; Neumann, D.A. [NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 6100, Gaithersburg, MD 20899-6100 (United States)

    2015-08-21

    The recent expansion of the National Institute of Standards and Technology (NIST) Center for Neutron Research facility has offered a rare opportunity to perform an accurate measurement of the cold neutron spectrum at the exit of a newly-installed neutron guide. Using a combination of a neutron time-of-flight measurement, a gold foil activation measurement, and Monte Carlo simulation of the neutron guide transmission, we obtain the most reliable experimental characterization of the Advanced Liquid Hydrogen Cold Neutron Source brightness to date. Time-of-flight measurements were performed at three distinct fuel burnup intervals, including one immediately following reactor startup. Prior to the latter measurement, the hydrogen was maintained in a liquefied state for an extended period in an attempt to observe an initial radiation-induced increase of the ortho (o)-hydrogen fraction. Since para (p)-hydrogen has a small scattering cross-section for neutron energies below 15 meV (neutron wavelengths greater than about 2.3 Å), changes in the o- p hydrogen ratio and in the void distribution in the boiling hydrogen influence the spectral distribution. The nature of such changes is simulated with a continuous-energy, Monte Carlo radiation-transport code using 20 K o and p hydrogen scattering kernels and an estimated hydrogen density distribution derived from an analysis of localized heat loads. A comparison of the transport calculations with the mean brightness function resulting from the three measurements suggests an overall o- p ratio of about 17.5(±1) % o- 82.5% p for neutron energies<15 meV, a significantly lower ortho concentration than previously assumed.

  8. Experimental characterization of the Advanced Liquid Hydrogen Cold Neutron Source spectrum of the NBSR reactor at the NIST Center for Neutron Research

    Science.gov (United States)

    Cook, J. C.; Barker, J. G.; Rowe, J. M.; Williams, R. E.; Gagnon, C.; Lindstrom, R. M.; Ibberson, R. M.; Neumann, D. A.

    2015-08-01

    The recent expansion of the National Institute of Standards and Technology (NIST) Center for Neutron Research facility has offered a rare opportunity to perform an accurate measurement of the cold neutron spectrum at the exit of a newly-installed neutron guide. Using a combination of a neutron time-of-flight measurement, a gold foil activation measurement, and Monte Carlo simulation of the neutron guide transmission, we obtain the most reliable experimental characterization of the Advanced Liquid Hydrogen Cold Neutron Source brightness to date. Time-of-flight measurements were performed at three distinct fuel burnup intervals, including one immediately following reactor startup. Prior to the latter measurement, the hydrogen was maintained in a liquefied state for an extended period in an attempt to observe an initial radiation-induced increase of the ortho (o)-hydrogen fraction. Since para (p)-hydrogen has a small scattering cross-section for neutron energies below 15 meV (neutron wavelengths greater than about 2.3 Å), changes in the o- p hydrogen ratio and in the void distribution in the boiling hydrogen influence the spectral distribution. The nature of such changes is simulated with a continuous-energy, Monte Carlo radiation-transport code using 20 K o and p hydrogen scattering kernels and an estimated hydrogen density distribution derived from an analysis of localized heat loads. A comparison of the transport calculations with the mean brightness function resulting from the three measurements suggests an overall o- p ratio of about 17.5(±1) % o- 82.5% p for neutron energies<15 meV, a significantly lower ortho concentration than previously assumed.

  9. Ultrafast Laser Interaction Processes for LIBS and Other Sensing Technologies

    Science.gov (United States)

    2013-04-05

    physics.nist.gov/asd3 [2008, December 2]. National Institute of Standards and Technology, Gaithersburg, MD 61 E.N. Sobol , Phase transformations and ablation...their position to within hundreds of microns of the sample, as seen in Fig. 49b. 67 E.N. Sobol , Phase

  10. Technology.

    Science.gov (United States)

    Online-Offline, 1998

    1998-01-01

    Focuses on technology, on advances in such areas as aeronautics, electronics, physics, the space sciences, as well as computers and the attendant progress in medicine, robotics, and artificial intelligence. Describes educational resources for elementary and middle school students, including Web sites, CD-ROMs and software, videotapes, books,…

  11. Preparation and LSC Standardization of ''89Sr (DNP) Using the CIEMAT/NIST Method; Preparacion del ''89Sr(DNP) y calibracion por centelleo liquido, mediante el metodo CIEMAT/NIST

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Barquero, L.; Los Arcos Merino, J. M.; Grau Malonda, A.

    1994-07-01

    A procedure for preparation of liquid scintillation counting samples of the strontium DNP complex, labelled with ''89Sr, is described, the chemical quench, the counting stability and spectral evolution of this compound is studied in six scintillators, Toluene, Toluene-alcohol, Dioxane-naphthalene, HiSafe II, Ultima- Gold and Instagel. The liquid scintillation standardization of 89Sr-DNP by the CIEMAT/NIST method, using HiSafe II and Ultima-Gold scintillators, has been carried out. The discrepancies between experimental and computed efficiencies are lower than 0.38% and 0.48%, respectively. The solution has been standardized in terms of activity concentration to an overall uncertainty of 0,38%. (Author) 10 refs.

  12. NBS/NIST Botanical SRMs-Thirty-Two Years of Production and Analysis: 1968 to 2000

    International Nuclear Information System (INIS)

    Donald A. Becker; Robert R. Greenberg

    2000-01-01

    This report surveys the work of the National Bureau of Standards/National Institute of Standards and Technology that began in the 1960s on botanical standard reference materials (SRMs) for neutron activation analysis

  13. Applications of Blockchain Technology beyond Cryptocurrency

    OpenAIRE

    Miraz, Mahdi H.; Ali, Maaruf

    2018-01-01

    Blockchain (BC), the technology behind the Bitcoin crypto-currency system, is considered to be both alluring and critical for ensuring enhanced security and (in some implementations, non-traceable) privacy for diverse applications in many other domains - including in the Internet of Things (IoT) eco-system. Intensive research is currently being conducted in both academia and industry applying the Blockchain technology in multifarious applications. Proof-of-Work (PoW), a cryptographic puzzle, ...

  14. 78 FR 34347 - Proposed Information Collection; Comment Request; the Building Construction Technology Extension...

    Science.gov (United States)

    2013-06-07

    ... DEPARTMENT OF COMMERCE National Institute of Standards and Technology Proposed Information..., DC 20230 (or via the Internet at [email protected] ). FOR FURTHER INFORMATION CONTACT: Requests for... information collection. Sponsored by the National Institute of Standards and Technology (NIST), the...

  15. Primary standardization of C-14 by means of CIEMAT/NIST, TDCR and 4πβ-γ methods

    International Nuclear Information System (INIS)

    Kuznetsova, Maria

    2016-01-01

    In this work, the primary standardization of "1"4C solution, which emits beta particles of maximum energy 156 keV, was made by means of three different methods: CIEMAT/NIST and TDCR (Triple To Double Coincidence Ratio) methods in liquid scintillation systems and the tracing method, in the 4πβ-γ coincidence system. TRICARB LSC (Liquid Scintillator Counting) system, equipped with two photomultipliers tubes, was used for CIEMAT/NIST method, using a "3H standard that emits beta particles with maximum energy of 18.7 keV, as efficiency tracing. HIDEX 300SL LSC system, equipped with three photomultipliers tubes, was used for TDCR method. Samples of "1"4C and "3H, for the liquid scintillator system, were prepared using three commercial scintillation cocktails, UltimaGold, Optiphase Hisafe3 and InstaGel-Plus, in order to compare the performance in the measurements. All samples were prepared with 15 mL scintillators, in glass vials with low potassium concentration. Known aliquots of radioactive solution were dropped onto the cocktail scintillators. In order to obtain the quenching parameter curve, a nitro methane carrier solution and 1 mL of distilled water were used. For measurements in the 4πβ-γ system, "6"0Co was used as beta gamma emitter. SCS (software coincidence system) was applied and the beta efficiency was changed by using electronic discrimination. The behavior of the extrapolation curve was predicted with code ESQUEMA, using Monte Carlo technique. The "1"4C activity obtained by the three methods applied in this work was compared and the results showed to be in agreement, within the experimental uncertainty. (author)

  16. Repeatability of magnetic resonance fingerprinting T1 and T2 estimates assessed using the ISMRM/NIST MRI system phantom.

    Science.gov (United States)

    Jiang, Yun; Ma, Dan; Keenan, Kathryn E; Stupic, Karl F; Gulani, Vikas; Griswold, Mark A

    2017-10-01

    The purpose of this study was to evaluate accuracy and repeatability of T 1 and T 2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom. The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T 1 , T 2 , and proton density values. Conventional inversion-recovery spin echo and spin echo methods were used to characterize the T 1 and T 2 values in the phantom. The phantom was scanned using the MRF-FISP method over 34 consecutive days. The mean T 1 and T 2 values were compared with the values from the spin echo methods. The repeatability was characterized as the coefficient of variation of the measurements over 34 days. T 1 and T 2 values from MRF-FISP over 34 days showed a strong linear correlation with the measurements from the spin echo methods (R 2  = 0.999 for T 1 ; R 2  = 0.996 for T 2 ). The MRF estimates over the wide ranges of T 1 and T 2 values have less than 5% variation, except for the shortest T 2 relaxation times where the method still maintains less than 8% variation. MRF measurements of T 1 and T 2 are highly repeatable over time and across wide ranges of T 1 and T 2 values. Magn Reson Med 78:1452-1457, 2017. © 2016 International Society for Magnetic Resonance in Medicine. © 2016 International Society for Magnetic Resonance in Medicine.

  17. Discrepancy of sodium mass fraction determined by INAA in the NIST SRM1547 and SRM1515 reference materials and their certified values

    International Nuclear Information System (INIS)

    Kamenik, Jan; Kucera, Jan

    2015-01-01

    Determination of sodium content in NIST standard reference materials (SRM) SRM 1547 and SRM 1515 in recent years yielded values higher than NIST certified values. Similarly, increased values were published for SRM 1547 by several laboratories, however, published sodium values SRM 1515 are in general in agreement with the certified value. Additional analysis of SRM 1547 and SRM 1515 using NIST SRM 3152a Sodium Standard Solution as a calibrator confirmed increased Na values. Inhomogeneity indicating external contamination of the stock material was not found. Moreover, increased Na value was also determined for freshly opened bottle of SRM 1547 material. Analysis of the historical material A-2 from our archive, which is identical with SRM 1515 and was distributed by NIST prior to the SRM 1515 certification and stored in a polyethylene vial, yielded a value in agreement with the certified value. A hypothesis was formulated that sodium in SRM 1547 and SRM 1515 materials could have been increasing after certification, perhaps due to the release of sodium from the glass bottle. (author)

  18. CERT (registered trademark) Resilience Management Model (CERT (registered trademark)-RMM) V1.1: NIST Special Publication Crosswalk Version 2

    Science.gov (United States)

    2014-06-01

    27000 series, COBIT, the British Standards Institution’s BS 25999, and ISO 24762  includes quantitative process measurements that can be used to...the NIST special publications 800 series, the International Organization for Standards ( ISO ) and International Electrotechnical Commission (IEC

  19. Calibration services for medical applications of radiation

    Energy Technology Data Exchange (ETDEWEB)

    DeWerd, L.A.

    1993-12-31

    Calibration services for the medical community applications of radiation involve measuring radiation precisely and having traceability to the National Institute of Standards and Technology (NIST). Radiation therapy applications involve the use of ionization chambers and electrometers for external beams and well-type ionization chamber systems as well as radioactive sources for brachytherapy. Diagnostic x-ray applications involve ionization chamber systems and devices to measure other parameters of the x-ray machine, such as non-invasive kVp meters. Calibration laboratories have been established to provide radiation calibration services while maintaining traceability to NIST. New radiation applications of the medical community spur investigation to provide the future calibration needs.

  20. Calibration services for medical applications of radiation

    International Nuclear Information System (INIS)

    DeWerd, L.A.

    1993-01-01

    Calibration services for the medical community applications of radiation involve measuring radiation precisely and having traceability to the National Institute of Standards and Technology (NIST). Radiation therapy applications involve the use of ionization chambers and electrometers for external beams and well-type ionization chamber systems as well as radioactive sources for brachytherapy. Diagnostic x-ray applications involve ionization chamber systems and devices to measure other parameters of the x-ray machine, such as non-invasive kVp meters. Calibration laboratories have been established to provide radiation calibration services while maintaining traceability to NIST. New radiation applications of the medical community spur investigation to provide the future calibration needs

  1. Traceable accounts of subjective probability judgments in the IPCC and beyond

    Science.gov (United States)

    Baer, P. G.

    2012-12-01

    One of the major sources of controversy surrounding the reports of the IPCC has been the characterization of uncertainty. Although arguably the IPCC has paid more attention to the process of uncertainty analysis and communication than any comparable assessment body, its efforts to achieve consistency have produced mixed results. In particular, the extensive use of subjective probability assessment has attracted widespread criticism. Statements such as "Average Northern Hemisphere temperatures during the second half of the 20th century were very likely higher than during any other 50-year period in the last 500 years" are ubiquitous (one online database lists nearly 3000 such claims), and indeed are the primary way in which its key "findings" are reported. Much attention is drawn to the precise quantitative definition of such statements (e.g., "very likely" means >90% probability, vs. "extremely likely" which means >95% certainty). But there is no process by which the decision regarding the choice of such uncertainty level for a given finding is formally made or reported, and thus they are easily by disputed by anyone, expert or otherwise, who disagrees with the assessment. In the "Uncertainty Guidance Paper" for the Third Assessment Report, Richard Moss and Steve Schneider defined the concept of a "traceable account," which gave exhaustive detail regarding how one ought to provide documentation of such an uncertainty assessment. But the guidance, while appearing straightforward and reasonable, in fact was an unworkable recipe, which would have taken near-infinite time if used for more than a few key results, and would have required a different structuring of the text than the conventional scientific assessment. And even then it would have left a gap when it came to the actual provenance of any such specific judgments, because there simply is no formal step at which individuals turn their knowledge of the evidence on some finding into a probability judgment. The

  2. Technology

    Directory of Open Access Journals (Sweden)

    Xu Jing

    2016-01-01

    Full Text Available The traditional answer card reading method using OMR (Optical Mark Reader, most commonly, OMR special card special use, less versatile, high cost, aiming at the existing problems proposed a method based on pattern recognition of the answer card identification method. Using the method based on Line Segment Detector to detect the tilt of the image, the existence of tilt image rotation correction, and eventually achieve positioning and detection of answers to the answer sheet .Pattern recognition technology for automatic reading, high accuracy, detect faster

  3. 76 FR 93 - Summer Undergraduate Research Fellowships (SURF) NIST Gaithersburg and Boulder Programs...

    Science.gov (United States)

    2011-01-03

    ... encourage outstanding undergraduate students to pursue careers in science and engineering. The objective of...: Catalog of Federal Domestic Assistance Name and Number: Measurement and Engineering Research and Standards... engineering sciences and, as the lead Federal agency for technology transfer, it provides a strong interface...

  4. Investigation on the traceability of three dimensional scanning electron microscope measurements based on the stereo-pair technique

    DEFF Research Database (Denmark)

    Bariani, Paolo; De Chiffre, Leonardo; Hansen, Hans Nørgaard

    2005-01-01

    An investigation was carried out concerning the traceability of dimensional measurements performed with the scanning electron microscope (SEM) using reconstruction of surface topography through stereo-photogrammetry. A theoretical description of the effects that the main instrumental variables...... with the scanning electron microscope (SEM) using reconstruction of surface topography through stereo-photogrammetry. A theoretical description of the effects that the main instrumental variables and measurement parameters have on the reconstruction accuracy of any point on the surface of the object being imaged......-dimensional topography of the type C roughness standards showed good agreement with the nominal profile wavelength values. An investigation was carried out concerning the traceability of dimensional measurements performed with the scanning electron microscope (SEM) using reconstruction of surface topography through...

  5. NGS tools for traceability in candies as high processed food products: Ion Torrent PGM versus conventional PCR-cloning.

    Science.gov (United States)

    Muñoz-Colmenero, Marta; Martínez, Jose Luis; Roca, Agustín; Garcia-Vazquez, Eva

    2017-01-01

    The Next Generation Sequencing methodologies are considered the next step within DNA-based methods and their applicability in different fields is being evaluated. Here, we tested the usefulness of the Ion Torrent Personal Genome Machine (PGM) in food traceability analyzing candies as a model of high processed foods, and compared the results with those obtained by PCR-cloning-sequencing (PCR-CS). The majority of samples exhibited consistency between methodologies, yielding more information and species per product from the PGM platform than PCR-CS. Significantly higher AT-content in sequences of the same species was also obtained from PGM. This together with some taxonomical discrepancies between methodologies suggest that the PGM platform is still pre-mature for its use in food traceability of complex highly processed products. It could be a good option for analysis of less complex food, saving time and cost per sample. Copyright © 2016 Elsevier Ltd. All rights reserved.

  6. Comparative analysis for evaluating the traceability of interventional devices using blood vessel phantom models made of PVA-H or silicone.

    Science.gov (United States)

    Yu, Chang-Ho; Kwon, Tae-Kyu; Park, Chan Hee; Ohta, Makoto; Kim, Sung Hoon

    2015-01-01

    In this paper, we investigated the parameters with effective traceability to assess the mechanical properties of interventional devices. In our evaluation system, a box-shaped poly (vinyl alcohol) hydrogel (PVA-H) and silicone were prepared with realistic geometry, and the measurement and evaluation of traceability were carried out on devices using load hand force. The phantom models had a total of five curve pathways to reach the aneurysm sac. Traceability depends on the performance of the interventional devices in order to pass through the curved part of the model simulation track. The traceability of the guide wire was found to be much better than that of the balloon and stent loading catheter, as it reached the aneurysm sac in both phantom models. Observation using the video record is another advantage of our system, because the high transparency of the materials with silicone and PVA-H can allow visualization of the inside of an artery.

  7. Mercury Science Objectives and Traceability Within the BepiColombo Project: Optimising the Science Output of the Next Mission to Mercury

    Science.gov (United States)

    Besse, S.; Benkhoff, J.; Bentley, M.; Cornet, T.; Moissl, R.; Munoz, C.; Zender, J.

    2018-05-01

    The BepiColombo Science Ground Segment is developing, in collaboration with the instrument teams, targeted science traceability matrix of each instrument. They are defined in such a way that they can be tracked during the observation lifecycle.

  8. Toward fish and seafood traceability: anchovy species determination in fish products by molecular markers and support through a public domain database.

    Science.gov (United States)

    Jérôme, Marc; Martinsohn, Jann Thorsten; Ortega, Delphine; Carreau, Philippe; Verrez-Bagnis, Véronique; Mouchel, Olivier

    2008-05-28

    Traceability in the fish food sector plays an increasingly important role for consumer protection and confidence building. This is reflected by the introduction of legislation and rules covering traceability on national and international levels. Although traceability through labeling is well established and supported by respective regulations, monitoring and enforcement of these rules are still hampered by the lack of efficient diagnostic tools. We describe protocols using a direct sequencing method based on 212-274-bp diagnostic sequences derived from species-specific mitochondria DNA cytochrome b, 16S rRNA, and cytochrome oxidase subunit I sequences which can efficiently be applied to unambiguously determine even closely related fish species in processed food products labeled "anchovy". Traceability of anchovy-labeled products is supported by the public online database AnchovyID ( http://anchovyid.jrc.ec.europa.eu), which provided data obtained during our study and tools for analytical purposes.

  9. Validation of novel calibration scheme with traceable point-like (22)Na sources on six types of PET scanners.

    Science.gov (United States)

    Hasegawa, Tomoyuki; Oda, Keiichi; Wada, Yasuhiro; Sasaki, Toshiaki; Sato, Yasushi; Yamada, Takahiro; Matsumoto, Mikio; Murayama, Hideo; Kikuchi, Kei; Miyatake, Hiroki; Abe, Yutaka; Miwa, Kenta; Akimoto, Kenta; Wagatsuma, Kei

    2013-05-01

    To improve the reliability and convenience of the calibration procedure of positron emission tomography (PET) scanners, we have been developing a novel calibration path based on traceable point-like sources. When using (22)Na sources, special care should be taken to avoid the effects of 1.275-MeV γ rays accompanying β (+) decays. The purpose of this study is to validate this new calibration scheme with traceable point-like (22)Na sources on various types of PET scanners. Traceable point-like (22)Na sources with a spherical absorber design that assures uniform angular distribution of the emitted annihilation photons were used. The tested PET scanners included a clinical whole-body PET scanner, four types of clinical PET/CT scanners from different manufacturers, and a small-animal PET scanner. The region of interest (ROI) diameter dependence of ROI values was represented with a fitting function, which was assumed to consist of a recovery part due to spatial resolution and a quadratic background part originating from the scattered γ rays. The observed ROI radius dependence was well represented with the assumed fitting function (R (2) > 0.994). The calibration factors determined using the point-like sources were consistent with those by the standard cross-calibration method within an uncertainty of ±4 %, which was reasonable considering the uncertainty in the standard cross-calibration method. This novel calibration scheme based on the use of traceable (22)Na point-like sources was successfully validated for six types of commercial PET scanners.

  10. Traceability Assessment and Performance Evaluation of Results for Measurement of Abbott Clinical Chemistry Assays on 4 Chemistry Analyzers.

    Science.gov (United States)

    Lim, Jinsook; Song, Kyung Eun; Song, Sang Hoon; Choi, Hyun-Jung; Koo, Sun Hoe; Kwon, Gye Choel

    2016-05-01

    -The traceability of clinical results to internationally recognized and accepted reference materials and reference measurement procedures has become increasingly important. Therefore, the establishment of traceability has become a mandatory requirement for all in vitro diagnostics devices. -To evaluate the traceability of the Abbott Architect c8000 system (Abbott Laboratories, Abbott Park, Illinois), consisting of calibrators and reagents, across 4 different chemistry analyzers, and to evaluate its general performance on the Toshiba 2000FR NEO (Toshiba Medical Systems Corporation, Otawara-shi, Tochigi-ken, Japan). -For assessment of traceability, secondary reference materials were evaluated 5 times, and then bias was calculated. Precision, linearity, and carryover were determined according to the guidelines of the Clinical and Laboratory Standards Institute (Wayne, Pennsylvania). -The biases from 4 different analyzers ranged from -2.33% to 2.70% on the Toshiba 2000FR NEO, -2.33% to 5.12% on the Roche Hitachi 7600 (Roche Diagnostics International, Basel, Switzerland), -0.93% to 2.87% on the Roche Modular, and -2.16% to 2.86% on the Abbott Architect c16000. The total coefficients of variance of all analytes were less than 5%. The coefficients of determination (R(2)) were more than 0.9900. The carryover rate ranged from -0.54% to 0.17%. -Abbott clinical chemistry assays met the performance criteria based on desirable biological variation for precision, bias, and total error. They also showed excellent linearity and carryover. Therefore, these clinical chemistry assays were found to be accurate and reliable and are readily applicable on the various platforms used in this study.

  11. TRACEABILITY OF PRECISION MEASUREMENTS ON COORDINATE MEASURING MACHINES – UNCERTAINTY ASSESSMENT BY USING CALIBRATED WORPIECES ON CMMs

    DEFF Research Database (Denmark)

    Tosello, Guido; De Chiffre, Leonardo

    This document is used in connection with one exercise 30 minutes duration as a part of the course VISION ONLINE – One week course on Precision & Nanometrology. The exercise concerns establishment of traceability of precision measurements on coordinate measuring machines. This document contains...... a short description of each step in the exercise, the uncertainty budget as described in the ISO/TS 15530 part 3 and tables from the excel spreadsheets....

  12. Review: Authentication and traceability of foods from animal origin by polymerase chain reaction-based capillary electrophoresis.

    Science.gov (United States)

    Rodríguez-Ramírez, Roberto; González-Córdova, Aarón F; Vallejo-Cordoba, Belinda

    2011-01-31

    This work presents an overview of the applicability of PCR-based capillary electrophoresis (CE) in food authentication and traceability of foods from animal origin. Analytical approaches for authenticating and tracing meat and meat products and fish and seafood products are discussed. Particular emphasis will be given to the usefulness of genotyping in food tracing by using CE-based genetic analyzers. Copyright © 2010 Elsevier B.V. All rights reserved.

  13. Knowledge, attitudes and practices of traceability among livestock traders in south-western Nigeria: implications for sustainable livestock industry.

    Science.gov (United States)

    Adesokan, Hezekiah K; Ocheja, Samuel E

    2014-01-01

    Livestock diseases and other animal health events are a threat to achieving sustainable livestock industry. The knowledge of trace-back and the practice of providing feedback on diseases encountered in slaughtered animals from the abattoir to the farm can help limit the spread as well as manage potential future incidents of such diseases. We assessed the knowledge, attitudes and practices of 200 willing livestock traders on traceability in Bodija Municipal Abattoir, south-western Nigeria. The results reveal that the majority of these traders had poor knowledge (79.5 %) and practices (74.0 %) of traceability, though 89.5 % demonstrated good attitudes. While 22.9 % knew that traceability could be an effective means to control diseases, only a lower proportion (9.0 %) knew the health status of the animals being purchased. Though 29.0 % reported the diseases encountered in their animals during slaughter to the farm, only 9.5 % followed up to ensure the farmers take steps at preventing further occurrence of the reported diseases. While age (p = 0.000; 0.014) and education (p = 0.000; 0.000) were both significant for good knowledge and attitudes, frequency of condemned cases (p = 0.000) and length of years in the trade (p = 0.004) were, respectively, significant for good knowledge and attitudes with none associated with practice. These poor levels of knowledge and practices of traceability are a threat to sustainable livestock industry, food security and human health; hence, there is an urgent need to institute national feedback mechanism on slaughtered animals in order to strengthen interventions against diseases at farm levels.

  14. Specific NIST projects in support of the NIJ Concealed Weapon Detection and Imaging Program

    Science.gov (United States)

    Paulter, Nicholas G.

    1998-12-01

    The Electricity Division of the National Institute of Standards and Technology is developing revised performance standards for hand-held (HH) and walk-through (WT) metal weapon detectors, test procedures and systems for these detectors, and a detection/imaging system for finding concealed weapons. The revised standards will replace the existing National Institute of Justice (NIJ) standards for HH and WT devices and will include detection performance specifications as well as system specifications (environmental conditions, mechanical strength and safety, response reproducibility and repeatability, quality assurance, test reporting, etc.). These system requirements were obtained from the Law Enforcement and corrections Technology Advisory Council, an advisory council for the NIJ. Reproducible and repeatable test procedures and appropriate measurement systems will be developed for evaluating HH and WT detection performance. A guide to the technology and application of non- eddy-current-based detection/imaging methods (such as acoustic, passive millimeter-wave and microwave, active millimeter-wave and terahertz-wave, x-ray, etc.) Will be developed. The Electricity Division is also researching the development of a high- frequency/high-speed (300 GH to 1 THz) pulse-illuminated, stand- off, video-rate, concealed weapons/contraband imaging system.

  15. Failure mode and effects analysis of witnessing protocols for ensuring traceability during IVF.

    Science.gov (United States)

    Rienzi, Laura; Bariani, Fiorenza; Dalla Zorza, Michela; Romano, Stefania; Scarica, Catello; Maggiulli, Roberta; Nanni Costa, Alessandro; Ubaldi, Filippo Maria

    2015-10-01

    Traceability of cells during IVF is a fundamental aspect of treatment, and involves witnessing protocols. Failure mode and effects analysis (FMEA) is a method of identifying real or potential breakdowns in processes, and allows strategies to mitigate risks to be developed. To examine the risks associated with witnessing protocols, an FMEA was carried out in a busy IVF centre, before and after implementation of an electronic witnessing system (EWS). A multidisciplinary team was formed and moderated by human factors specialists. Possible causes of failures, and their potential effects, were identified and risk priority number (RPN) for each failure calculated. A second FMEA analysis was carried out after implementation of an EWS. The IVF team identified seven main process phases, 19 associated process steps and 32 possible failure modes. The highest RPN was 30, confirming the relatively low risk that mismatches may occur in IVF when a manual witnessing system is used. The introduction of the EWS allowed a reduction in the moderate-risk failure mode by two-thirds (highest RPN = 10). In our experience, FMEA is effective in supporting multidisciplinary IVF groups to understand the witnessing process, identifying critical steps and planning changes in practice to enable safety to be enhanced. Copyright © 2015 Reproductive Healthcare Ltd. Published by Elsevier Ltd. All rights reserved.

  16. Improved Traceability of a Small Satellite Mission Concept to Requirements Using Model Based System Engineering

    Science.gov (United States)

    Reil, Robin L.

    2014-01-01

    Model Based Systems Engineering (MBSE) has recently been gaining significant support as a means to improve the "traditional" document-based systems engineering (DBSE) approach to engineering complex systems. In the spacecraft design domain, there are many perceived and propose benefits of an MBSE approach, but little analysis has been presented to determine the tangible benefits of such an approach (e.g. time and cost saved, increased product quality). This paper presents direct examples of how developing a small satellite system model can improve traceability of the mission concept to its requirements. A comparison of the processes and approaches for MBSE and DBSE is made using the NASA Ames Research Center SporeSat CubeSat mission as a case study. A model of the SporeSat mission is built using the Systems Modeling Language standard and No Magic's MagicDraw modeling tool. The model incorporates mission concept and requirement information from the mission's original DBSE design efforts. Active dependency relationships are modeled to demonstrate the completeness and consistency of the requirements to the mission concept. Anecdotal information and process-duration metrics are presented for both the MBSE and original DBSE design efforts of SporeSat.

  17. Improved Traceability of Mission Concept to Requirements Using Model Based Systems Engineering

    Science.gov (United States)

    Reil, Robin

    2014-01-01

    Model Based Systems Engineering (MBSE) has recently been gaining significant support as a means to improve the traditional document-based systems engineering (DBSE) approach to engineering complex systems. In the spacecraft design domain, there are many perceived and propose benefits of an MBSE approach, but little analysis has been presented to determine the tangible benefits of such an approach (e.g. time and cost saved, increased product quality). This thesis presents direct examples of how developing a small satellite system model can improve traceability of the mission concept to its requirements. A comparison of the processes and approaches for MBSE and DBSE is made using the NASA Ames Research Center SporeSat CubeSat mission as a case study. A model of the SporeSat mission is built using the Systems Modeling Language standard and No Magics MagicDraw modeling tool. The model incorporates mission concept and requirement information from the missions original DBSE design efforts. Active dependency relationships are modeled to analyze the completeness and consistency of the requirements to the mission concept. Overall experience and methodology are presented for both the MBSE and original DBSE design efforts of SporeSat.

  18. Traceability of different apple varieties by multivariate analysis of isotope ratio mass spectrometry data.

    Science.gov (United States)

    Mimmo, Tanja; Camin, Federica; Bontempo, Luana; Capici, Calogero; Tagliavini, Massimo; Cesco, Stefano; Scampicchio, Matteo

    2015-11-15

    The awareness of customers of the origin of foods has become an important issue. The growing demand for foods that are healthy, safe and of high quality has increased the need for traceability and clear labelling. Thus, this study investigates the capability of C and N stable isotope ratios to determine the geographical origin of several apple varieties grown in northern Italy. Four apple varieties (Cripps Pink, Gala, Golden Delicious, Granny Smith) have been sampled in orchards located in the Districts of Bolzano, Ferrara, Verona and Udine (northern Italy). Carbon (δ(13) C) and nitrogen (δ(15) N) isotope values of the whole apple fruits and three sub-fractions (peel, pulp and seed) have been determined simultaneously by isotope ratio mass spectrometry. The δ(13) C and δ(15) N values of apples and apple sub-fractions, such as peel, seed and pulp, were significantly affected by the geographical origin and the fruit variety. The four varieties could be distinguished to a certain extent only within each district. A 99% correct identification of the samples according to their origin was, however, achieved by cross validation with the 'leave-one-out' method. This study proves the potential of stable isotopes to discriminate the geographical origin of apples grown in orchards located only a few hundreds of kilometres apart. Stable isotopes were also able to discriminate different apple varieties, although only within small geographical areas. Copyright © 2015 John Wiley & Sons, Ltd.

  19. Traceable size determination of PMMA nanoparticles based on Small Angle X-ray Scattering (SAXS)

    Energy Technology Data Exchange (ETDEWEB)

    Gleber, G; Cibik, L; Mueller, P; Krumrey, M [Physikalisch-Technische Bundesanstalt (PTB), Abbestrasse 2-12, 10587 Berlin (Germany); Haas, S; Hoell, A, E-mail: gudrun.gleber@ptb.d [Helmholtz-Zentrum-Berlin fuer Materialien und Energie (HZB), Albert-Einstein-Strasse 15, 12489 Berlin (Germany)

    2010-10-01

    The size and size distribution of PMMA nanoparticles has been investigated with SAXS (small angle X-ray scattering) using monochromatized synchrotron radiation. The uncertainty has contributions from the wavelength or photon energy of the radiation, the scattering angle and the fit procedure for the obtained scattering curves. The wavelength can be traced back to the lattice constant of silicon, and the scattering angle is traceable via geometric measurements of the detector pixel size and the distance between the sample and the detector. SAXS measurements and data evaluations have been performed at different distances and photon energies for two PMMA nanoparticle suspensions with low polydispersity and nominal diameters of 108 nm and 192 nm, respectively, as well as for a mixture of both. The relative variation of the diameters obtained for different experimental conditions was below {+-} 0.3 %. The determined number-weighted mean diameters of (109.0 {+-} 0.7) nm and (188.0 {+-} 1.3) nm, respectively, are close to the nominal values.

  20. Traceable size determination of PMMA nanoparticles based on Small Angle X-ray Scattering (SAXS)

    Science.gov (United States)

    Gleber, G.; Cibik, L.; Haas, S.; Hoell, A.; Müller, P.; Krumrey, M.

    2010-10-01

    The size and size distribution of PMMA nanoparticles has been investigated with SAXS (small angle X-ray scattering) using monochromatized synchrotron radiation. The uncertainty has contributions from the wavelength or photon energy of the radiation, the scattering angle and the fit procedure for the obtained scattering curves. The wavelength can be traced back to the lattice constant of silicon, and the scattering angle is traceable via geometric measurements of the detector pixel size and the distance between the sample and the detector. SAXS measurements and data evaluations have been performed at different distances and photon energies for two PMMA nanoparticle suspensions with low polydispersity and nominal diameters of 108 nm and 192 nm, respectively, as well as for a mixture of both. The relative variation of the diameters obtained for different experimental conditions was below ± 0.3 %. The determined number-weighted mean diameters of (109.0 ± 0.7) nm and (188.0 ± 1.3) nm, respectively, are close to the nominal values.