Survey of product quality control of radioactive waste

International Nuclear Information System (INIS)

Warnecke, E.

1989-01-01

The PTB has developed basic procedures with regard to deriving final storage conditions and product quality control. After this, requirements for radioactive waste are derived via safety analysers, in which information about the radioactive waste, the geological overall situation of the site and the layout of the final storage mine, in particular, are included as basic data. The final storage conditions are only determined with the awarding of the planning decision. Compliance with them can be proved by random sample tests on waste containers or via a qualification and inspection of the conditioning process. (DG) [de

Quality Control Applications

CERN Document Server

Chorafas, Dimitris N

2013-01-01

Quality control is a constant priority in electrical, mechanical, aeronautical, and nuclear engineering – as well as in the vast domain of electronics, from home appliances to computers and telecommunications. Quality Control Applications provides guidance and valuable insight into quality control policies; their methods, their implementation, constant observation and associated technical audits. What has previously been a mostly mathematical topic is translated here for engineers concerned with the practical implementation of quality control. Once the fundamentals of quality control are established, Quality Control Applications goes on to develop this knowledge and explain how to apply it in the most effective way. Techniques are described and supported using relevant, real-life, case studies to provide detail and clarity for those without a mathematical background. Among the many practical examples, two case studies dramatize the importance of quality assurance: A shot-by-shot analysis of the errors made ...

Implementation of a quality control program for a 6 MeV linear photon accelerator

International Nuclear Information System (INIS)

Berdaky, Mafalda F.; Caldas, Linda V.E.

2001-01-01

This paper describes the operational characteristics of the final process of implementation of a quality control program using routine mechanical and radiation tests. The quality control program was performed during 35 months and demonstrated the excellent stability of this accelerator. (author)

Association of adherence to epilepsy quality standards with seizure control.

Science.gov (United States)

Moura, Lidia M V R; Mendez, Diego Yacaman; Jesus, Jonathan De; Andrade, Rogger A; Weissman, Joel S; Vickrey, Barbara G; Hoch, Daniel B

2015-11-01

We assessed the relationship between adherence to epilepsy quality measures (EQM) and seizure control over 2-3 years in a retrospective cohort study. 6150 patients were identified at two large academic medical centers with a primary or secondary diagnosis of epilepsy, were 18-85 years old and seen in outpatient general neurology or epilepsy units between June 2011 and May 2014. Patients were included if: their initial visit was between June 2011 and June 2012, treatment was with ≥1 anti-seizure drug, there was ≥1 visit per year during the timeframe, and seizure frequency was documented at initial and final visits, yielding 162 patients/1055 visits from which socio-demographic, clinical and care quality data were abstracted. Quality care was assessed as (1) percent adherence to up to 8 eligible EQM, and (2) defect-free care (DFC: adherence to all eligible EQM). Seizure control (SC) was defined as ≥50% reduction in average seizures/month between initial and final visits. Chi-square and t-test compared care quality with seizure control. Logistic regression was used to assess the relationships between SC, quality of care and subspecialist involvement. Care quality, reflected by documentation of seizure frequency, addressing therapeutic interventions, and referral to a comprehensive epilepsy center, all exceeded 80% adherence. Care quality as reflected by documentation of seizure type, etiology or syndrome; assessment of side effects, counseling about epilepsy safety and women's issues, and screening for psychiatric disorders ranged from 40 to 57%. Mean EQM adherence across all applicable measures was associated with greater seizure control (p=0.0098). DFC was low (=8%) and did not covary with seizure control (p=0.55). The SC and non-SC groups only differed on epilepsy etiology (p=0.04). Exploratory analysis showed that mean quality scores are associated with seizure control (OR=4.9 [1.3-18.5], p=0.017) while controlling for the effect of subspecialty involvement

Process-based quality for thermal spray via feedback control

Science.gov (United States)

Dykhuizen, R. C.; Neiser, R. A.

2006-09-01

Quality control of a thermal spray system manufacturing process is difficult due to the many input variables that need to be controlled. Great care must be taken to ensure that the process remains constant to obtain a consistent quality of the parts. Control is greatly complicated by the fact that measurement of particle velocities and temperatures is a noisy stochastic process. This article illustrates the application of quality control concepts to a wire flame spray process. A central feature of the real-time control system is an automatic feedback control scheme that provides fine adjustments to ensure that uncontrolled variations are accommodated. It is shown how the control vectors can be constructed from simple process maps to independently control particle velocity and temperature. This control scheme is shown to perform well in a real production environment. We also demonstrate that slight variations in the feed wire curvature can greatly influence the process. Finally, the geometry of the spray system and sensor must remain constant for the best reproducibility.

Validation of analytical methods for the quality control of Naproxen suppositories

International Nuclear Information System (INIS)

Rodriguez Hernandez, Yaslenis; Suarez Perez, Yania; Garcia Pulpeiro, Oscar; Hernandez Contreras, Orestes Yuniel

2011-01-01

The analysis methods that will be used for the quality control of the future Cuban-made Naproxen suppositories for adults and children were developed for the first time in this paper. One method based on direct ultraviolet spectrophotometry was put forward, which proved to be specific, linear, accurate and precise for the quality control of Naproxen suppositories, taking into account the presence of chromophore groups in their structure. Likewise, the direct semi-aqueous acid-base volumetry method aimed at the quality control of the Naproxen raw material was changed and adapted to the quality control of suppositories. On the basis of the validation process, there was demonstrated the adequate specificity of this method with respect to the formulation components, as well as its linearity, accuracy and precision in 1-3 mg/ml range. The final results were compared and no significant statistical differences among the replicas per each dose were found in both methods; therefore, both may be used in the quality control of Naproxen suppositories

EERE Quality Control Workshop Final Report: Proceedings from the EERE Quality Control Workshop, in support of the DOE Clean Energy Manufacturing Initiative; Golden, Colorado, December 9-10, 2013

Energy Technology Data Exchange (ETDEWEB)

2014-05-01

The U.S. Department of Energy Office of Energy Efficiency & Renewable Energy (EERE) has recognized the cross-cutting, pre-competitive and enabling nature of quality control for a wide range of clean energy technologies. As such, the Fuel Cell Technologies Office, Solar Energy Technologies Office, Vehicle Technologies Office, Building Technologies Office, and Advanced Manufacturing Office decided to explore needs and potential cross-office synergies in this area by holding the EERE Quality Control Workshop, in support of the DOE Clean Energy Manufacturing Initiative. This report summarizes the purpose and scope of the workshop; reviews the current status and state-of-the-art for in-line quality control; summarizes the results from three breakout sessions; and presents conclusions and recommendations.

Facing a Problem of Electrical Energy Quality in Ship Networks-measurements, Estimation, Control

Institute of Scientific and Technical Information of China (English)

Tomasz Tarasiuk; Janusz Mindykowski; Xiaoyan Xu

2003-01-01

In this paper, electrical energy quality and its indices in ship electric networks are introduced, especially the meaning of electrical energy quality terms in voltage and active and reactive power distribution indices. Then methods of measurement of marine electrical energy indices are introduced in details and a microprocessor measurement-diagnosis system with the function of measurement and control is designed. Afterwards, estimation and control of electrical power quality of marine electrical power networks are introduced. And finally, according to the existing method of measurement and control of electrical power quality in ship power networks, the improvement of relative method is proposed.

Role of the medical physicist in quality control in diagnostic x-ray departments

International Nuclear Information System (INIS)

Cameron, J.R.

1973-01-01

Medical physicists can play a role in education of future radiologists and technologists by teaching quality control needs and techniques. He or she can also provide service to the diagnostic section by establishing a quality control program. Finally, the medical physicist can play an important role in the development of simple and inexpensive techniques for quality control by radiological technologists. The ongoing work at the University of Wisconsin in this area is to provide quality control in measurement of the effective kVcp, the measurement of the effective focal spot size, the performance of the processing equipment, the output in mR/mAs, and the measurement of the half-value-layer and the total filtration. (U.S.)

Quality Management, Quality Assurance and Quality Control in Blood Establishments

OpenAIRE

Bolbate, N

2008-01-01

Quality terms and the roots of the matter are analyzed according to European Committee’s recommendations. Essence of process and product quality control as well as essence of quality assurance is described. Quality system’s structure including quality control, quality assurance and management is justified in the article.

Quality control in diagnostic radiology - patient dosimetry

Energy Technology Data Exchange (ETDEWEB)

Prlic, I; Radalj, Z; Brumen, V; Cerovac, H [Institute for Medical Research and Occupational Health, Laboratory for Radiation Protection and Dosimetry, Zagreb (Croatia); Gladic, J [Institute for Physics, Laboratory for Solid State Physics, Zagreb (Croatia); Tercek, V [Clinical Hospital Sisters of Mercy, Health Physics Department, Zagreb (Croatia)

1997-12-31

In order to establish the Quality Criteria for diagnostic radiographic images in the radiology departments in Republic of Croatia we have started the several Quality Control projects on the field. The measurements are performed according to some methodology recommendations in our law but the methodology, measurement principles, measurement equipment, phantoms, measurable parameters for the good use by radiographers, statistical and numerical evaluation, dosimetric philosophy etc. where first recognized as a private/or group hazard of each person involved in the procedure of evaluation of diagnostic radiology images/diagnosis. The important quality elements of the imaging process are: the diagnostic quality of the radiographic image, the radiation dose to the patient and the choice of the radiographic technique. This depends on the x-ray unit (tube) radiation quality, image processing quality and final image evaluation quality. In this paper we will show how the Quality Control measurements can be easily connected to the dose delivered to the patient for the known diagnostic procedure and how this can be used by radiographers in their daily work. The reproducibility of the x-ray generator was checked before the service calibration and after the service calibration. The table of kV dependence and output dose per mAs was calculated and the ESD (entrance surface dose) was measured/calculated for the specific diagnostic procedure. After the phantom calculation were made and the dose prediction for the given procedure was done, measurements were done on the patients (digital dosemeters, TLD and film dosemeter combinations). We are claiming that there is no need to measure each patient if the proper Quality Control measurements are done and the proper table of ESD for each particular x-ray tube in diagnostic departments is calculated for the radiographers daily use. (author). 1 example, 1 fig., 13 refs.

Principles and Practices for Quality Assurance and Quality Control

Science.gov (United States)

Jones, Berwyn E.

1999-01-01

Quality assurance and quality control are vital parts of highway runoff water-quality monitoring projects. To be effective, project quality assurance must address all aspects of the project, including project management responsibilities and resources, data quality objectives, sampling and analysis plans, data-collection protocols, data quality-control plans, data-assessment procedures and requirements, and project outputs. Quality control ensures that the data quality objectives are achieved as planned. The historical development and current state of the art of quality assurance and quality control concepts described in this report can be applied to evaluation of data from prior projects.

Checking quality control?

DEFF Research Database (Denmark)

Brodersen, Lars

2005-01-01

How is quality control doing within the community of GIS, web-services based on geo-information, GI etc.?......How is quality control doing within the community of GIS, web-services based on geo-information, GI etc.?...

Protein quality control in organelles - AAA/FtsH story.

Science.gov (United States)

Janska, Hanna; Kwasniak, Malgorzata; Szczepanowska, Joanna

2013-02-01

This review focuses on organellar AAA/FtsH proteases, whose proteolytic and chaperone-like activity is a crucial component of the protein quality control systems of mitochondrial and chloroplast membranes. We compare the AAA/FtsH proteases from yeast, mammals and plants. The nature of the complexes formed by AAA/FtsH proteases and the current view on their involvement in degradation of non-native organellar proteins or assembly of membrane complexes are discussed. Additional functions of AAA proteases not directly connected with protein quality control found in yeast and mammals but not yet in plants are also described shortly. Following an overview of the molecular functions of the AAA/FtsH proteases we discuss physiological consequences of their inactivation in yeast, mammals and plants. The molecular basis of phenotypes associated with inactivation of the AAA/FtsH proteases is not fully understood yet, with the notable exception of those observed in m-AAA protease-deficient yeast cells, which are caused by impaired maturation of mitochondrial ribosomal protein. Finally, examples of cytosolic events affecting protein quality control in mitochondria and chloroplasts are given. This article is part of a Special Issue entitled: Protein Import and Quality Control in Mitochondria and Plastids. Copyright © 2012 Elsevier B.V. All rights reserved.

Region III involvement in quality control and quality assurance of radon testing methods

International Nuclear Information System (INIS)

Coyle, F.T.

1990-01-01

Region III has set a goal of increasing the testing for radon by our residents. One approach to this goal, is to bolster the public's confidence in the testing laboratories. We believe that this can be done most effectively by assuring the quality of the measurements available to the public. All Proficient Laboratories and Pennsylvania Certified Laboratories have submitted a quality assurance (QA) program. A QA audit checklist has been developed which will be finalized and made available to the states in our Region. This paper deals with inspection, verification, and documentation of the various laboratories and their compliance with prudent measuring protocols and addresses the following items: Organization and responsibilities; Sampling procedures; Detector chain of custody; Measurement procedures, quality control checks; State certification and RMP; Data resection, validation, and reporting; Quality assurance reports to management; Interview and discussion of QA audit with responsible officer

Medical Devices; Immunology and Microbiology Devices; Classification of the Assayed Quality Control Material for Clinical Microbiology Assays. Final order.

Science.gov (United States)

2017-07-27

The Food and Drug Administration (FDA, Agency, or we) is classifying the assayed quality control material for clinical microbiology assays into class II (special controls). The special controls that will apply to the device are identified in this order and will be part of the codified language for the assayed quality control material for clinical microbiology assays' classification. The Agency is classifying the device into class II (special controls) to provide a reasonable assurance of safety and effectiveness of the device.

Quality control of intelligence research

International Nuclear Information System (INIS)

Lu Yan; Xin Pingping; Wu Jian

2014-01-01

Quality control of intelligence research is the core issue of intelligence management, is a problem in study of information science This paper focuses on the performance of intelligence to explain the significance of intelligence research quality control. In summing up the results of the study on the basis of the analysis, discusses quality control methods in intelligence research, introduces the experience of foreign intelligence research quality control, proposes some recommendations to improve quality control in intelligence research. (authors)

Interaction between production control and quality control

NARCIS (Netherlands)

Bij, van der J.D.; Ekert, van J.H.W.

1999-01-01

Describes a qualitative study on interaction between systems for production control and quality control within industrial organisations. Production control and quality control interact in a sense. Good performance for one aspect often influences or frustrates the performance of the other. As far as

Quality control in radiotherapy

International Nuclear Information System (INIS)

Batalla, A.

2009-01-01

The authors discuss the modalities and periodicities of internal quality control on radiotherapy installations. They indicate the different concerned systems and the aspects and items to be controlled (patient and personnel security, apparatus mechanical characteristics, beam quality, image quality, isodose and irradiation duration calculation, data transfer). They present the measurement instruments and tools used for the mechanical controls, dose measurement, beam homogeneity and symmetry, anatomic data acquisition systems, and dose distribution and control imagery calculation

Immediate outcome indicators in perioperative care: a controlled intervention study on quality improvement in hospitals in Tanzania.

Science.gov (United States)

Bosse, Goetz; Mtatifikolo, Ferdinand; Abels, Wiltrud; Strosing, Christian; Breuer, Jan-Philipp; Spies, Claudia

2013-01-01

Outcome assessment is the standard for evaluating the quality of health services worldwide. In this study, outcome has been divided into immediate and final outcome. Aim was to compare an intervention hospital with a Continuous Quality Improvement approach to a control group using benchmark assessments of immediate outcome indicators in surgical care. Results were compared to final outcome indicators. Surgical care quality in six hospitals in Tanzania was assessed from 2006-2011, using the Hospital Performance Assessment Tool. Independent observers assessed structural, process and outcome quality using checklists based on evidence-based guidelines. The number of surgical key procedures over the benchmark of 80% was compared between the intervention hospital and the control group. Results were compared to Case Fatality Rates. In the intervention hospital, in 2006, two of nine key procedures reached the benchmark, one in 2009, and four in 2011. In the control group, one of nine key procedures reached the benchmark in 2006, one in 2009, and none in 2011. Case Fatality Rate for all in-patients in the intervention hospital was 5.5% (n = 12,530) in 2006, 3.5% (n = 21,114) in 2009 and 4.6% (n = 18,840) in 2011. In the control group it was 3.1% (n = 17,827) in 2006, 4.2% (n = 13,632) in 2009 and 3.8% (n = 17,059) in 2011. Results demonstrated that quality assurance improved performance levels in both groups. After the introduction of Continuous Quality Improvement, performance levels improved further in the intervention hospital while quality in the district hospital did not. Immediate outcome indicators appeared to be a better steering tool for quality improvement compared to final outcome indicators. Immediate outcome indicators revealed a need for improvement in pre- and postoperative care. Quality assurance programs based on immediate outcome indicators can be effective if embedded in Continuous Quality Improvement. Nevertheless, final outcome

Quality assurance and quality control for radiotherapy/medical oncology in Europe: guideline development and implementation.

Science.gov (United States)

Valentini, V; Glimelius, B; Frascino, V

2013-09-01

The past two decades have brought tremendous changes to the practice of radiation oncology and medical oncology. To manage all the complexities related to the new technologies and the new drugs, the radiation and medical oncologists have to enhance their clinical action and professional skill profile. To accomplish this they have to find reliable tools in the quality of their medical practice and in future research activities. Quality assurance (QA) and quality control (QC) for radiation and medical oncologists mean to clarify the different components of the clinical decision, to supervise with proper methodology the required steps needed to accomplish the agreed outcomes and to control them. Quality for radiation and medical oncology means to supervise each clinical and technical component of the whole process to guarantee that all steps together will arrive at the final and best possible outcome. Key components are guidelines, specialization and a multidisciplinary approach. The research of global quality could represent a further complexity, but it is the best tool to give a perspective and a chance to further improvements of our disciplines and to promote better outcome in all cancer patients. Copyright © 2013 Elsevier Ltd. All rights reserved.

[Quality control and assessment of qualitative interview in health care research].

Science.gov (United States)

Xie, Yan-ming; Liao, Xing

2008-07-01

It is not finally concluded how to standardize the use of qualitative research in the world. Qualitative researchers disagree with each other about this issue. As we know, there have been a large number of articles written in different ways about qualitative research due to the "flexibility", one of its features. Qualitative research is quite different from quantitative research which is easy to control its quality and quality assessment. A series of criteria has been set up for quantitative research. However qualitative research needs to be improved in these aspects, in which qualitative interviews are mostly used at home and abroad at present. Hence, it becomes an important and urgent issue for qualitative researchers to standardly control and assess the quality of qualitative interview.

Quality control in the design, fabrication and operation of the ITER magnets

International Nuclear Information System (INIS)

Mitchell, N.

2006-01-01

The ITER magnets are a complex system involving interfaces between many advanced technologies (superconductors, forging/welding/machining of massive structures, cryogenics, composites and moulding, high voltage electrical), yet at the same time form part of the ITER 'basic machine' which is required to operate at the design parameters, broadly failure free, for the design life of the tokamak. This imposes special quality control problems for the ITER project integration by the ITER International Team (IT) through the design, fabrication and operation. The magnets are not a test bed for new technology but in spite of this must use it, successfully. There is little previous experience of such a system but full functionality is required from the start, with limited opportunity for adjustment. And, finally, costs and schedule must be contained. The procurement strategy for the machine, with magnet components being supplied 'in kind', requires particular attention to the specifications, scheduling and quality control (QC). Special issues here are the testing requirements on magnet components, especially before final installation but also at critical intermediate stages. Unnecessary or ineffective quality control procedures cause delay and high costs, and divert attention from critical items. The main points of the magnet QC programme are summarised, including the use of codes and standards, qualification, manufacturing quality assurance, commissioning and in-service inspection

Internal quality control: best practice.

Science.gov (United States)

Kinns, Helen; Pitkin, Sarah; Housley, David; Freedman, Danielle B

2013-12-01

There is a wide variation in laboratory practice with regard to implementation and review of internal quality control (IQC). A poor approach can lead to a spectrum of scenarios from validation of incorrect patient results to over investigation of falsely rejected analytical runs. This article will provide a practical approach for the routine clinical biochemistry laboratory to introduce an efficient quality control system that will optimise error detection and reduce the rate of false rejection. Each stage of the IQC system is considered, from selection of IQC material to selection of IQC rules, and finally the appropriate action to follow when a rejection signal has been obtained. The main objective of IQC is to ensure day-to-day consistency of an analytical process and thus help to determine whether patient results are reliable enough to be released. The required quality and assay performance varies between analytes as does the definition of a clinically significant error. Unfortunately many laboratories currently decide what is clinically significant at the troubleshooting stage. Assay-specific IQC systems will reduce the number of inappropriate sample-run rejections compared with the blanket use of one IQC rule. In practice, only three or four different IQC rules are required for the whole of the routine biochemistry repertoire as assays are assigned into groups based on performance. The tools to categorise performance and assign IQC rules based on that performance are presented. Although significant investment of time and education is required prior to implementation, laboratories have shown that such systems achieve considerable reductions in cost and labour.

[On-site quality control of acupuncture randomized controlled trial: design of content and checklist of quality control based on PICOST].

Science.gov (United States)

Li, Hong-Jiao; He, Li-Yun; Liu, Zhi-Shun; Sun, Ya-Nan; Yan, Shi-Yan; Liu, Jia; Zhao, Ye; Liu, Bao-Yan

2014-02-01

To effectively guarantee quality of randomized controlld trial (RCT) of acupuncture and develop reasonable content and checklist of on-site quality control, influencing factors on quality of acupuncture RCT are analyzed and scientificity of quality control content and feasibility of on-site manipulation are put into overall consideration. Based on content and checklist of on-site quality control in National 11th Five-Year Plan Project Optimization of Comprehensive Treatment Plan for TCM in Prevention and Treatment of Serious Disease and Clinical Assessment on Generic Technology and Quality Control Research, it is proposed that on-site quality control of acupuncture RCT should be conducted with PICOST (patient, intervention, comparison, out come, site and time) as core, especially on quality control of interveners' skills and outcome assessment of blinding, and checklist of on-site quality control is developed to provide references for undertaking groups of the project.

Surface topography analysis for dimensional quality control of replication at the micrometre scale

DEFF Research Database (Denmark)

Balcon, M.; Marinello, F.; Tosello, Guido

2011-01-01

Replication of geometrical features and surfaces are present at different production levels, from realization of moulds to final product. Geometrical features must be reproduced within specification limits, to ensure product functionality . In order to control the replication quality, mould...... and replica surfaces must be quantitatively analysed and compared. In the present work, reference simulated surfaces were considered and studied in order to evaluate the effectiveness and traceability of different analysis tools for replication quality control. Topographies were analysed simulating different...

Electronic Nose for Microbiological Quality Control of Food Products

Directory of Open Access Journals (Sweden)

M. Falasconi

2012-01-01

Full Text Available Electronic noses (ENs have recently emerged as valuable candidates in various areas of food quality control and traceability, including microbial contamination diagnosis. In this paper, the EN technology for microbiological screening of food products is reviewed. Four paradigmatic and diverse case studies are presented: (a Alicyclobacillus spp. spoilage of fruit juices, (b early detection of microbial contamination in processed tomatoes, (c screening of fungal and fumonisin contamination of maize grains, and (d fungal contamination on green coffee beans. Despite many successful results, the high intrinsic variability of food samples together with persisting limits of the sensor technology still impairs ENs trustful applications at the industrial scale. Both advantages and drawbacks of sensor technology in food quality control are discussed. Finally, recent trends and future directions are illustrated.

Gravity packaging final waste recovery based on gravity separation and chemical imaging control.

Science.gov (United States)

Bonifazi, Giuseppe; Serranti, Silvia; Potenza, Fabio; Luciani, Valentina; Di Maio, Francesco

2017-02-01

Plastic polymers are characterized by a high calorific value. Post-consumer plastic waste can be thus considered, in many cases, as a typical secondary solid fuels according to the European Commission directive on End of Waste (EoW). In Europe the practice of incineration is considered one of the solutions for waste disposal waste, for energy recovery and, as a consequence, for the reduction of waste sent to landfill. A full characterization of these products represents the first step to profitably and correctly utilize them. Several techniques have been investigated in this paper in order to separate and characterize post-consumer plastic packaging waste fulfilling the previous goals, that is: gravity separation (i.e. Reflux Classifier), FT-IR spectroscopy, NIR HyperSpectralImaging (HSI) based techniques and calorimetric test. The study demonstrated as the proposed separation technique and the HyperSpectral NIR Imaging approach allow to separate and recognize the different polymers (i.e. PolyVinyl Chloride (PVC), PolyStyrene (PS), PolyEthylene (PE), PoliEtilene Tereftalato (PET), PolyPropylene (PP)) in order to maximize the removal of the PVC fraction from plastic waste and to perform the full quality control of the resulting products, can be profitably utilized to set up analytical/control strategies finalized to obtain a low content of PVC in the final Solid Recovered Fuel (SRF), thus enhancing SRF quality, increasing its value and reducing the "final waste". Copyright © 2016 Elsevier Ltd. All rights reserved.

Perioperative Care and the Importance of Continuous Quality Improvement—A Controlled Intervention Study in Three Tanzanian Hospitals

Science.gov (United States)

Mtatifikolo, Ferdinand; Ngoli, Baltazar; Neuner, Bruno; Wernecke, Klaus–Dieter; Spies, Claudia

2015-01-01

Introduction Surgical services are increasingly seen to reduce death and disability in Sub-Saharan Africa, where hospital-based mortality remains alarmingly high. This study explores two implementation approaches to improve the quality of perioperative care in a Tanzanian hospital. Effects were compared to a control group of two other hospitals in the region without intervention. Methods All hospitals conducted quality assessments with a Hospital Performance Assessment Tool. Changes in immediate outcome indicators after one and two years were compared to final outcome indicators such as Anaesthetic Complication Rate and Surgical Case Fatality Rate. Results Immediate outcome indicators for Preoperative Care in the intervention hospital improved (52.5% in 2009; 84.2% in 2011, pimproved to then decline again (63.3% in 2009; 70% in 2010; 58.6% in 2011). In the control group, preoperative care declined from 50.8% (2009) to 32.8% (2011, p improved, while at the same time final outcome declined (Surgical Case Fatality, Anaesthetic Complication Rate). Compared to the control group, final outcome improved more in the intervention hospital, although the effect was not significant over the whole study period. Documentation of final outcome indicators seemed inconsistent. Immediate outcome indicators seem more helpful to steer the Continuous Quality Improvement program. Conclusion Specific interventions as part of Continuous Quality Improvement might lead to sustainable improvement of the quality of care, if embedded in a multi-faceted approach. PMID:26327392

Software product quality control

CERN Document Server

Wagner, Stefan

2013-01-01

Quality is not a fixed or universal property of software; it depends on the context and goals of its stakeholders. Hence, when you want to develop a high-quality software system, the first step must be a clear and precise specification of quality. Yet even if you get it right and complete, you can be sure that it will become invalid over time. So the only solution is continuous quality control: the steady and explicit evaluation of a product's properties with respect to its updated quality goals.This book guides you in setting up and running continuous quality control in your environment. Star

Quality assurance and quality control

International Nuclear Information System (INIS)

Kaden, W.

1986-01-01

General preconditions and methods for QA work in the nuclear field are analysed. The application of general QA principles to actual situations is illustrated by examples in the fields of engineering and of the manufacturing of mechanical and electrical components. All QA measures must be fitted to the complexity and relevance of the work steps, which are under consideration. The key to good product quality is the control of working processes. The term 'controlled process' is discussed in detail and examples of feed back systems are given. The main QA measures for the operation of nuclear power plants include the establishment of a Quality Assurance Program, training and qualification of personnel, procurement control, inspection and tests, reviews and audits. These activities are discussed. (orig.)

Quality control in nuclear medicine

International Nuclear Information System (INIS)

Leme, P.R.

1983-01-01

The following topics are discussed: objectives of the quality control in nuclear medicine; the necessity of the quality control in nuclear medicine; guidelines and recommendations. An appendix is given concerning the guidelines for the quality control and instrumentation in nuclear medicine. (M.A.) [pt

Statistical process control: An approach to quality assurance in the production of vitrified nuclear waste

International Nuclear Information System (INIS)

Pulsipher, B.A.; Kuhn, W.L.

1987-01-01

Current planning for liquid high-level nuclear wastes existing in the United States includes processing in a liquid-fed ceramic melter to incorporate it into a high-quality glass, and placement in a deep geologic repository. The nuclear waste vitrification process requires assurance of a quality product with little or no final inspection. Statistical process control (SPC) is a quantitative approach to one quality assurance aspect of vitrified nuclear waste. This method for monitoring and controlling a process in the presence of uncertainties provides a statistical basis for decisions concerning product quality improvement. Statistical process control is shown to be a feasible and beneficial tool to help the waste glass producers demonstrate that the vitrification process can be controlled sufficiently to produce an acceptable product. This quantitative aspect of quality assurance could be an effective means of establishing confidence in the claims to a quality product

Statistical process control: An approach to quality assurance in the production of vitrified nuclear waste

International Nuclear Information System (INIS)

Pulsipher, B.A.; Kuhn, W.L.

1987-02-01

Current planning for liquid high-level nuclear wastes existing in the US includes processing in a liquid-fed ceramic melter to incorporate it into a high-quality glass, and placement in a deep geologic repository. The nuclear waste vitrification process requires assurance of a quality product with little or no final inspection. Statistical process control (SPC) is a quantitative approach to one quality assurance aspect of vitrified nuclear waste. This method for monitoring and controlling a process in the presence of uncertainties provides a statistical basis for decisions concerning product quality improvement. Statistical process control is shown to be a feasible and beneficial tool to help the waste glass producers demonstrate that the vitrification process can be controlled sufficiently to produce an acceptable product. This quantitative aspect of quality assurance could be an effective means of establishing confidence in the claims to a quality product. 2 refs., 4 figs

Importance of implementing an analytical quality control system in a core laboratory.

Science.gov (United States)

Marques-Garcia, F; Garcia-Codesal, M F; Caro-Narros, M R; Contreras-SanFeliciano, T

2015-01-01

The aim of the clinical laboratory is to provide useful information for screening, diagnosis and monitoring of disease. The laboratory should ensure the quality of extra-analytical and analytical process, based on set criteria. To do this, it develops and implements a system of internal quality control, designed to detect errors, and compare its data with other laboratories, through external quality control. In this way it has a tool to detect the fulfillment of the objectives set, and in case of errors, allowing corrective actions to be made, and ensure the reliability of the results. This article sets out to describe the design and implementation of an internal quality control protocol, as well as its periodical assessment intervals (6 months) to determine compliance with pre-determined specifications (Stockholm Consensus(1)). A total of 40 biochemical and 15 immunochemical methods were evaluated using three different control materials. Next, a standard operation procedure was planned to develop a system of internal quality control that included calculating the error of the analytical process, setting quality specifications, and verifying compliance. The quality control data were then statistically depicted as means, standard deviations, and coefficients of variation, as well as systematic, random, and total errors. The quality specifications were then fixed and the operational rules to apply in the analytical process were calculated. Finally, our data were compared with those of other laboratories through an external quality assurance program. The development of an analytical quality control system is a highly structured process. This should be designed to detect errors that compromise the stability of the analytical process. The laboratory should review its quality indicators, systematic, random and total error at regular intervals, in order to ensure that they are meeting pre-determined specifications, and if not, apply the appropriate corrective actions

Software to implement the IAEA-TECDOC 1517: quality control in mammography

International Nuclear Information System (INIS)

Mora Rodriguez, Patricia

2011-01-01

Mammography quality control is presented; also, guidelines for establishing a quality control program through tests to be performed, equipment, frequencies and tolerances. The work is intended for radiologists, medical physicists and technologists. Also examples of data collection sheets, minimum equipment list and overview of a quality control program are included. Two projects (RLA/9/057 and RLA/9/067) raised the goal of developing a software that allows a simple and effective way to automate the evidence contained in the TECDOC. The V1 is presented in the IRPA 12 (2008), which was tested in some countries to detect problems in their use and include possible improvements. However, the final revised version for distribution in member countries was get in 2010. The way of work on the project is described and who has worked. Also, a complete program, its importance and the projection of the Universidad de Costa Rica to work with the same. (author) [es

Medicaid/CHIP Program; Medicaid Program and Children's Health Insurance Program (CHIP); Changes to the Medicaid Eligibility Quality Control and Payment Error Rate Measurement Programs in Response to the Affordable Care Act. Final rule.

Science.gov (United States)

2017-07-05

This final rule updates the Medicaid Eligibility Quality Control (MEQC) and Payment Error Rate Measurement (PERM) programs based on the changes to Medicaid and the Children's Health Insurance Program (CHIP) eligibility under the Patient Protection and Affordable Care Act. This rule also implements various other improvements to the PERM program.

40 CFR 75.21 - Quality assurance and quality control requirements.

Science.gov (United States)

2010-07-01

... quality assurance audit or any other audit, the system is out-of-control. The owner or operator shall... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Quality assurance and quality control... assurance and quality control requirements. (a) Continuous emission monitoring systems. The owner or...

Influence Implementation Internal Control To Quality Audit Internal Education Consultant In Indonesian

Directory of Open Access Journals (Sweden)

Nur Zeina Maya Sari

2015-08-01

Full Text Available Abstract This research focus to quality audit internal with accountancy Inspection. Hameed 1995 found that the most important factors that affect auditing quality are auditors experience honesty and the knowledge in accounting and auditing standards. Research into this express an inspection of Intern Accountancy amp attributed to Monetary inspection an consultant education with quality. Audit quality is obtained by a process of identifying and administering the activities needed to achieve the quality objectives . Since an entityamp8223s internal control is under the purview of its audit committee Krishnan 2005 the relation between audit committee quality and internal control weaknesses is a subject to be investigated. The methodology used is a quantitative analysis by examining the relationship between variables conceptually. While some study its accounting activity. In self-supporting internal control. Internal control is defined as a process affected by an entitys board of directors management and other personnel designed to provide reasonable assurance regarding the achievement of objectives International Organization of Supreme Audit Institutions 1998 its bearing by reporting level an environment and reduction conduct in reporting result of mistake. What finally involvement by Audit Intern can be of benefit. In addition to researching into proposing Audit Intern can improve the target of consultant education going concern.

Commercial jet fuel quality control

Energy Technology Data Exchange (ETDEWEB)

Strauss, K.H.

1995-05-01

The paper discusses the purpose of jet fuel quality control between the refinery and the aircraft. It describes fixed equipment, including various types of filters, and the usefulness and limitations of this equipment. Test equipment is reviewed as are various surveillance procedures. These include the Air Transport Association specification ATA 103, the FAA Advisory Circular 150/5230-4, the International Air Transport Association Guidance Material for Fuel Quality Control and Fuelling Service and the Guidelines for Quality Control at Jointly Operated Fuel Systems. Some past and current quality control problems are briefly mentioned.

SPECT quality control tests

International Nuclear Information System (INIS)

Robilotta, C.C.; Rebelo, M.F.S.; Oliveira, M.A.; Abe, R.

1987-01-01

Quality control tests of tomographic system composed by a rotatory chamber (CGR Gammatomome T-9000) and a microcomputer are presented. Traditional quality control tests for scintilation chambers and specific tests for tomographic systems are reported. (M.A.C.) [pt

Incorporating Quality Control Information in the Sensor Web

Science.gov (United States)

Devaraju, Anusuriya; Kunkel, Ralf; Bogena, Heye

2013-04-01

The rapid development of sensing technologies had led to the creation of large amounts of heterogeneous environmental observations. The Sensor Web provides a wider access to sensors and observations via common protocols and specifications. Observations typically go through several levels of quality control, and aggregation before they are made available to end-users. Raw data are usually inspected, and related quality flags are assigned. Data are gap-filled, and errors are removed. New data series may also be derived from one or more corrected data sets. Until now, it is unclear how these kinds of information can be captured in the Sensor Web Enablement (SWE) framework. Apart from the quality measures (e.g., accuracy, precision, tolerance, or confidence), the levels of observational series, the changes applied, and the methods involved must be specified. It is important that this kind of quality control information is well described and communicated to end-users to allow for a better usage and interpretation of data products. In this paper, we describe how quality control information can be incorporated into the SWE framework. Concerning this, first, we introduce the TERENO (TERrestrial ENvironmental Observatories), an initiative funded by the large research infrastructure program of the Helmholtz Association in Germany. The main goal of the initiative is to facilitate the study of long-term effects of climate and land use changes. The TERENO Online Data RepOsitORry (TEODOOR) is a software infrastructure that supports acquisition, provision, and management of observations within TERENO via SWE specifications and several other OGC web services. Next, we specify changes made to the existing observational data model to incorporate quality control information. Here, we describe the underlying TERENO data policy in terms of provision and maintenance issues. We present data levels, and their implementation within TEODOOR. The data levels are adapted from those used by

Quality assurance and quality control of nuclear engineering during construction phase

International Nuclear Information System (INIS)

Zhang Zhihua; Deng Yue; Liu Yaoguang; Xu Xianqi; Zhou Shan; Qian Dazhi; Zhang Yang

2007-01-01

The quality assurance (QA) and quality control (QC) is a very important work in the nuclear engineering. This paper starts with how to establish quality assurance system of nuclear engineering construction phase, then introduces several experiments and techniques such as the implementation of quality assurance program, the quality assurance and quality control of contractors, the quality surveillance and control of supervisory companies, quality assurance audit and surveillance of builders. (authors)

Analytical quality control concept in the Euratom on-site laboratories

International Nuclear Information System (INIS)

Mayer, K.; Duinslaeger, L.; Cromboom, O.; Ottmar, H.; Wojnowski, D.; Vegt, H. van der

2001-01-01

Full text: Two on-site laboratories have been developed, installed, commissioned and put into routine operation by the Euratom safeguards office (ESO), jointly with the Institute for Transuranium Elements (ITU). These laboratories are operated by ITU staff and provide verification measurement results on samples taken by Euratom inspectors. The analysts work in weekly changing shift teams, manage the laboratories and operate the various analytical techniques. Operating such a laboratory at a remote location, without a senior scientist immediately available in case of problems, The existing boundary conditions challenge the robustness of the entire laboratory, i.e. comprising staff and instrumentation. In order to continuously ensure a high degree of reliability of the measurement results, a stringent quality control system was implemented. The quality control concept for the two on-site laboratories was developed at a very early stage and implemented in the pre-OSL training facility at ITU. This enabled to thoroughly test and develop further the concept. At the same time the analysts get acquainted with the quality control procedures in place and they are instilled with the principles. The quality control concept makes use of a fully computerized data management and data acquisition system. All measurement devices, including balances, density meters, mass spectrometers, passive neutron counter, hybrid K-edge instrument, gamma spectrometers and alpha spectrometers are networked and data exchange is performed on electronic basis. A specifically developed laboratory information management system collects individual measurement data, calculates intermediate and final result and shares the information with a quality control module. In order to ensure the reliability of the results, which are reported to the ESO inspectorate, five levels of quality control were implemented. The present paper describes in detail the different levels of quality control, which check the

Quality control: comparison of images quality with screen film system and digital mammography CR

International Nuclear Information System (INIS)

Alvarenga, Frederico L.; Nogueira, Maria do Socorro

2008-01-01

The mammography screen film system should be used as part of processing chemicals, revelation process, equipment and this system has have a progressive replacing by the digital technology Full Field Digital Mammography FFDM, Computed Radiography (CR) Mammography and hardcopy. This new acquisition process of medical images has improved radiology section; however it is necessary efficient means for evaluating of the quality parameters. It should be considered taking into account the adaptation of the existent equipment and that procedures adopted for the exam, as well the adaptation of the new mammography films, the radiologist view box constitutes a part of the quality control program. This program aims at obtaining radiography with good quality that allows obtaining more information for the diagnosis and decreases the patient dose. For evaluation the quality image, this article is focused on presenting the differences regarding the acquired images through simulator mammography radiographic PMMA (Poly methyl methacrylate) in CR Mammography system and screen film system. The tests were accomplished at the same equipment of Mammography with the Automatic Exposure Control using a tension of 28 kV for both systems. The quality tests evaluated the spatial resolution, the own structures of the phantom, artifacts, optical density and contrast with conventional and laser films by mammography system. The installation for the accomplishment of the test has a quality control program. The evaluation was based on the pattern developed by the competent organ of the State of Minas Gerais. In this study, it was verified that the suitable Phantom Mama used by the Brazilian School of Radiology for conventional mammography did not obtain satisfactory result for Spatial Resolution in the digital mammography system CR. The final aim of this work is to obtain parameters to characterize the reference phantom quality image in an objective way. These parameters will be used to compare

Neuropsychiatric symptoms and quality of life in patients in the final phase of dementia.

Science.gov (United States)

Koopmans, Raymond T C M; van der Molen, Marloes; Raats, Monique; Ettema, Teake P

2009-01-01

To assess neuropsychiatric symptoms and quality of life in a group of patients in the final phase of dementia. All patients with dementia (n = 216) residing on dementia special care units of two Dutch nursing homes were included in the study provided they met the criteria for the final phase of dementia. Neuropsychiatric symptoms were assessed with the Neuropsychiatric Inventory Nursing Home version (NPI-NH) and the Cohen Mansfield Agitation Inventory (CMAI). Quality of life was assessed with the QUALIDEM. Of the 216 dementia patients 39 met the criteria for the final phase of dementia. The patients showed a specific pattern of behaviours with a high prevalence of apathy, agitation and behaviours that were mainly observed during morning care such as making strange noises, grabbing, performing repetitious mannerism, spitting, hitting, screaming and pushing. Overall quality of life of these patients in the final phase of dementia was moderate. In this small sample, patients in the final phase of dementia show specific behavioural problems, that mainly should be addressed with psychosocial interventions. (c) 2008 John Wiley & Sons, Ltd.

Perioperative Care and the Importance of Continuous Quality Improvement--A Controlled Intervention Study in Three Tanzanian Hospitals.

Science.gov (United States)

Bosse, Goetz; Abels, Wiltrud; Mtatifikolo, Ferdinand; Ngoli, Baltazar; Neuner, Bruno; Wernecke, Klaus-Dieter; Spies, Claudia

2015-01-01

Surgical services are increasingly seen to reduce death and disability in Sub-Saharan Africa, where hospital-based mortality remains alarmingly high. This study explores two implementation approaches to improve the quality of perioperative care in a Tanzanian hospital. Effects were compared to a control group of two other hospitals in the region without intervention. All hospitals conducted quality assessments with a Hospital Performance Assessment Tool. Changes in immediate outcome indicators after one and two years were compared to final outcome indicators such as Anaesthetic Complication Rate and Surgical Case Fatality Rate. Immediate outcome indicators for Preoperative Care in the intervention hospital improved (52.5% in 2009; 84.2% in 2011, pcontrol group, preoperative care declined from 50.8% (2009) to 32.8% (2011, p hospital declined (1.89% before intervention; 0.96% after intervention, p = 0.006). Surgical Case Fatality Rate in the intervention hospital declined from 5.67% before intervention to 2.93% after intervention (pcontrol group was 4% before intervention and 3.8% after intervention (p = 0.411). Anaesthetic Complication Rate in the control group was not available. Immediate outcome indicators initially improved, while at the same time final outcome declined (Surgical Case Fatality, Anaesthetic Complication Rate). Compared to the control group, final outcome improved more in the intervention hospital, although the effect was not significant over the whole study period. Documentation of final outcome indicators seemed inconsistent. Immediate outcome indicators seem more helpful to steer the Continuous Quality Improvement program. Specific interventions as part of Continuous Quality Improvement might lead to sustainable improvement of the quality of care, if embedded in a multi-faceted approach.

Quality assurance methods and procedures for accepting radioactive waste for final storage

International Nuclear Information System (INIS)

Wenger, R.

1992-01-01

The concept of quality assurance for the final storage of radioactive materials is presented together with the procedure, characterisation, procedural development and documentation involved. Other topics include the assessment of the material to find its suitability for final storage and the tests for transport. 4 figs., 9 refs

40 CFR 51.359 - Quality control.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 2 2010-07-01 2010-07-01 false Quality control. 51.359 Section 51.359....359 Quality control. Quality control measures shall insure that emission testing equipment is calibrated and maintained properly, and that inspection, calibration records, and control charts are...

Design of a Quality Control Program for the Measurement of Gross Alpha and Gross Beta Activities (LMPR-CIEMAT)

International Nuclear Information System (INIS)

Alvarez, A.; Yague, L.; Gasco, C.; Navarro, N.; Higueras, E.; Noguerales, C.

2010-01-01

In accordance with international standards, general requirements for testing laboratories have to include a quality system for planning, implementing, and assessing the work performed by the organization and for carrying out required quality assurance and quality control. The purpose of internal laboratory quality control is to monitor performance, identify problems, and initiate corrective actions. This report describes the internal quality control to monitor the gross alpha and beta activities determination. Identification of specific performance indicators, the principles that govern their use and statistical means of evaluation are explained. Finally, calculation of alpha and beta specific activities, uncertainties and detection limits are performed. (Author) 10 refs.

Quality Control in Diagnostic Radiology in the Netherlands (invited paper)

International Nuclear Information System (INIS)

Zoetelief, J.

1998-01-01

Application of the general principles of radiation protection to medical diagnostic radiology implies that each procedure using X rays or radionuclides is to be justified and optimised. Optimisation in diagnostic radiology implies that the radiation burden to the patient should be as low as possible, but compatible with the image quality necessary to obtain an adequate diagnosis or to guide treatment. Quality control of equipment is a prerequisite for achieving optimisation in diagnostic radiology. This was especially recognised for mammography as employed for breast cancer screening. Existing legislation in the Netherlands includes only a few criteria for equipment used in diagnostic radiology. In addition, the criteria are not all operational and measurement methods are lacking. Therefore, upon the initiative of the Dutch Ministry of Health, Welfare and Sports, the relevant professional societies, in collaboration with the former TNO Centre for Radiological Protection and Dosimetry, formulated eleven guidelines for quality control of equipment used in diagnostic radiology, including test procedures, test frequencies and limiting values. The implementation of quality control of equipment was included in the 1984 European Directive (84/466/Euratom) laying down basic measures for the radiation protection of persons undergoing medical examination or treatment. In the most recent European Directive on medical exposure (97/43/Euratom) the importance of quality control is stressed. In addition, the latter EC directive proposes the use of diagnostic reference levels for limiting the risks for patients undergoing diagnostic radiology. In the Netherlands preliminary reference levels for various procedures employed in diagnostic radiology are suggested. Finally, methods applied in the Netherlands for assessment of image quality are discussed. (author)

Requirements for quality control of analytical data for the Environmental Restoration Program

International Nuclear Information System (INIS)

Engels, J.

1992-12-01

The Environmental Restoration (ER) Program was established for the investigation and remediation of inactive US Department of Energy (DOE) sites and facilities that have been declared surplus in terms of their previous uses. The purpose of this document is to Specify ER requirements for quality control (QC) of analytical data. Activities throughout all phases of the investigation may affect the quality of the final data product, thus are subject to control specifications. Laboratory control is emphasized in this document, and field concerns will be addressed in a companion document Energy Systems, in its role of technical coordinator and at the request of DOE-OR, extends the application of these requirements to all participants in ER activities. Because every instance and concern may not be addressed in this document, participants are encouraged to discuss any questions with the ER Quality Assurance (QA) Office, the Analytical Environmental Support Group (AESG), or the Analytical Project Office (APO)

Network-based production quality control

Science.gov (United States)

Kwon, Yongjin; Tseng, Bill; Chiou, Richard

2007-09-01

This study investigates the feasibility of remote quality control using a host of advanced automation equipment with Internet accessibility. Recent emphasis on product quality and reduction of waste stems from the dynamic, globalized and customer-driven market, which brings opportunities and threats to companies, depending on the response speed and production strategies. The current trends in industry also include a wide spread of distributed manufacturing systems, where design, production, and management facilities are geographically dispersed. This situation mandates not only the accessibility to remotely located production equipment for monitoring and control, but efficient means of responding to changing environment to counter process variations and diverse customer demands. To compete under such an environment, companies are striving to achieve 100%, sensor-based, automated inspection for zero-defect manufacturing. In this study, the Internet-based quality control scheme is referred to as "E-Quality for Manufacturing" or "EQM" for short. By its definition, EQM refers to a holistic approach to design and to embed efficient quality control functions in the context of network integrated manufacturing systems. Such system let designers located far away from the production facility to monitor, control and adjust the quality inspection processes as production design evolves.

A new hyperspectral imaging based device for quality control in plastic recycling

Science.gov (United States)

Bonifazi, G.; D'Agostini, M.; Dall'Ava, A.; Serranti, S.; Turioni, F.

2013-05-01

The quality control of contamination level in the recycled plastics stream has been identified as an important key factor for increasing the value of the recycled material by both plastic recycling and compounder industries. Existing quality control methods for the detection of both plastics and non-plastics contaminants in the plastic waste streams at different stages of the industrial process (e.g. feed, intermediate and final products) are currently based on the manual collection from the stream of a sample and on the subsequent off-line laboratory analyses. The results of such analyses are usually available after some hours, or sometimes even some days, after the material has been processed. The laboratory analyses are time-consuming and expensive (both in terms of equipment cost and their maintenance and of labour cost).Therefore, a fast on-line assessment to monitor the plastic waste feed streams and to characterize the composition of the different plastic products, is fundamental to increase the value of secondary plastics. The paper is finalized to describe and evaluate the development of an HSI-based device and of the related software architectures and processing algorithms for quality assessment of plastics in recycling plants, with particular reference to polyolefins (PO). NIR-HSI sensing devices coupled with multivariate data analysis methods was demonstrated as an objective, rapid and non-destructive technique that can be used for on-line quality and process control in the recycling process of POs. In particular, the adoption of the previous mentioned HD&SW integrated architectures can provide a solution to one of the major problems of the recycling industry, which is the lack of an accurate quality certification of materials obtained by recycling processes. These results could therefore assist in developing strategies to certify the composition of recycled PO products.

Implementation of a quality control program for a 6 MeV linear photon accelerator; Implantacao de um programa de controle de qualidade de um acelerador linear de 6 MeV de fotons

Energy Technology Data Exchange (ETDEWEB)

Berdaky, Mafalda F. [Centro Brasileiro de Radioterapia, Oncologia e Mastologia (CEBROM), Goiania, GO (Brazil); Caldas, Linda V.E. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)]. E-mail: lcaldas@net.ipen.br

2001-10-01

This paper describes the operational characteristics of the final process of implementation of a quality control program using routine mechanical and radiation tests. The quality control program was performed during 35 months and demonstrated the excellent stability of this accelerator. (author)

Development of quality control system for fingerprint comparison processes

Directory of Open Access Journals (Sweden)

Shiquan Liu

2017-01-01

Full Text Available Fingerprint evidence played an important role in investigation, prosecution, and trial process due to the belief of its uniqueness and unchanged characteristics. However, in recent years, the science behind the process of fingerprint comparisons has been questioned. Main research questions have been focusing on the opaqueness within the comparison processes, subjective judgments, lack of universal standards, no error rate expression on final conclusions, and poor scientific fundamental research data. Facing the above-mentioned questions, this paper aims to suggest a quality control system (QCS for fingerprint comparison processes. This QCS is based on the use of software (PiAnoS and its technological features, being able to provide a data management model to increase the transparency and quality of fingerprint comparison processes.

Radiopharmaceutical quality control-Pragmatic approach

International Nuclear Information System (INIS)

Barbier, Y.

1994-01-01

The quality control must be considered in a practical manner. The radiopharmaceuticals are drugs. They must satisfy the quality assurance control. These products are then conform to Pharmacopeia. But sometimes the user must control some data especially radiochemical purity and pH value. On all the administered solutions four controls are compulsory: radionuclide identity, administered radioactivity, organoleptic character and pH

7 CFR 981.42 - Quality control.

Science.gov (United States)

2010-01-01

... 7 Agriculture 8 2010-01-01 2010-01-01 false Quality control. 981.42 Section 981.42 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... Regulating Handling Quality Control § 981.42 Quality control. (a) Incoming. Except as provided in this...

Quality control of dosemeters

International Nuclear Information System (INIS)

Mendes, L.

1984-01-01

Nuclear medicine laboratories are required to assay samples of radioactivity to be administered to patients. Almost universally, these assays are acomplished by use of a well ionization chamber isotope calibrator. The Instituto de Radioprotecao e Dosimetria (Institute for Radiological Protection and Dosimetry) of the Comissao Nacional de Energia Nuclear (National Commission for Nuclear Energy) is carrying out a National Quality Control Programme in Nuclear Medicine, supported by the International Atomic Energy Agency. The assessment of the current needs and practices of quality control in the entire country of Brazil includes Dose Calibrators and Scintilation Cameras, but this manual is restricted to the former. Quality Control Procedures for these Instruments are described in this document together with specific recommendations and assessment of its accuracy. (Author) [pt

Control cards as a statistical quality control resource

Directory of Open Access Journals (Sweden)

Aleksandar Živan Drenovac

2013-02-01

Full Text Available Normal 0 false false false MicrosoftInternetExplorer4 This paper proves that applying of statistical methods can significantly contribute increasing of products and services quality, as well as increasing of institutions rating. Determining of optimal, apropos anticipatory and limitary values, is based on sample`s statistical analyze. Control cards represent very confident instrument, which is simple for use and efficient for control of process, by which process is maintained in set borders. Thus, control cards can be applied in quality control of procesess of weapons and military equipment production, maintenance of technical systems, as well as for seting of standards and increasing of quality level for many other activities.

7 CFR 930.44 - Quality control.

Science.gov (United States)

2010-01-01

... 7 Agriculture 8 2010-01-01 2010-01-01 false Quality control. 930.44 Section 930.44 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... Control § 930.44 Quality control. (a) Quality standards. The Board may establish, with the approval of the...

Quality control analysis at the hospital

International Nuclear Information System (INIS)

Kristensen, K.

1979-01-01

Quality control analysis is an integral part of quality assurance. In a system as with radiopharmaceuticals where part of the finishing of the product takes place at individual hospitals, the need for quality control analysis at the hospital can be discussed. Data are presented that stresses the importance of quality control by the manufacturer as a basis for limitation of such work at hospitals. A simplified programme is proposed

14 CFR 21.139 - Quality control.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Quality control. 21.139 Section 21.139... PROCEDURES FOR PRODUCTS AND PARTS Production Certificates § 21.139 Quality control. The applicant must show that he has established and can maintain a quality control system for any product, for which he...

33 CFR 385.21 - Quality control.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Quality control. 385.21 Section... Processes § 385.21 Quality control. (a) The Corps of Engineers and the non-Federal sponsor shall prepare a quality control plan, in accordance with applicable Corps of Engineers regulations, for each product that...

Related regulation of quality control of industrial products

International Nuclear Information System (INIS)

1983-04-01

This book introduce related regulation of quality control of industrial products, which includes regulations of industrial products quality control, enforcement ordinance of industrial products quality control, enforcement regulation of quality control of industrial products, designated items with industrial production quality indication, industrial production quality test, and industrial production quality test organization and management tips of factory quality by grade.

Quality control guarantees the safety of radiotherapy

International Nuclear Information System (INIS)

Aaltonen, P.

1994-01-01

While radiotherapy equipment has seen some decisive improvements in the last few decades, the technology has also become more complicated. The advanced equipment produces increasingly good treatment results, but the condition of the equipment must be controlled efficiently so as to eliminate any defects that might jeopardise patient safety. The quality assurance measures that are taken to show that certain equipment functions as required are known as quality control. The advanced equipment and stricter requirements set for the precision of radiotherapy have meant that more attention must be paid to quality control. The present radiation legislation stipulates that radiotherapy equipment must undergo regular quality control. The implementation of the quality control is supervised by the Finnish Centre for Radiation and Nuclear Safety (STUK). Hospitals carry out quality control in accordance with a programme approved by STUK, and STUK inspectors periodically visit hospitals to check the results of quality control. (orig.)

New process modeling[sic], design, and control strategies for energy efficiency, high product quality, and improved productivity in the process industries. Final project report; FINAL

International Nuclear Information System (INIS)

Ray, W. Harmon

2002-01-01

This project was concerned with the development of process design and control strategies for improving energy efficiency, product quality, and productivity in the process industries. In particular, (i) the resilient design and control of chemical reactors, and (ii) the operation of complex processing systems, was investigated. Specific topics studied included new process modeling procedures, nonlinear controller designs, and control strategies for multiunit integrated processes. Both fundamental and immediately applicable results were obtained. The new design and operation results from this project were incorporated into computer-aided design software and disseminated to industry. The principles and design procedures have found their way into industrial practice

Quality and reliability control on assemblies

International Nuclear Information System (INIS)

Mueller, H.

1976-01-01

Taking as an example electronic assemblies in printed circuit board engineering, quality control during manufacture is dealt with. After giving a survey of four phases of quality and reliability control, some specific methods of quality control are dealt with by means of a flowchart, and by some examples the necessity and the success of these measures are shown. (RW) [de

Quality Control in Mammography: Image Quality and Patient Doses

International Nuclear Information System (INIS)

Ciraj Bjelac, O.; Arandjic, D.; Boris Loncar, B.; Kosutic, D.

2008-01-01

Mammography is method of choice for early detection of breast cancer. The purpose of this paper is preliminary evaluation the mammography practice in Serbia, in terms of both quality control indicators, i.e. image quality and patient doses. The survey demonstrated considerable variations in technical parameters that affect image quality and patients doses. Mean glandular doses ranged from 0.12 to 2.8 mGy, while reference optical density ranged from 1.2 to 2.8. Correlation between image contrast and mean glandular doses was demonstrated. Systematic implementation of quality control protocol should provide satisfactory performance of mammography units and maintain satisfactory image quality and keep patient doses as low as reasonably practicable. (author)

Random Forest Application for NEXRAD Radar Data Quality Control

Science.gov (United States)

Keem, M.; Seo, B. C.; Krajewski, W. F.

2017-12-01

Identification and elimination of non-meteorological radar echoes (e.g., returns from ground, wind turbines, and biological targets) are the basic data quality control steps before radar data use in quantitative applications (e.g., precipitation estimation). Although WSR-88Ds' recent upgrade to dual-polarization has enhanced this quality control and echo classification, there are still challenges to detect some non-meteorological echoes that show precipitation-like characteristics (e.g., wind turbine or anomalous propagation clutter embedded in rain). With this in mind, a new quality control method using Random Forest is proposed in this study. This classification algorithm is known to produce reliable results with less uncertainty. The method introduces randomness into sampling and feature selections and integrates consequent multiple decision trees. The multidimensional structure of the trees can characterize the statistical interactions of involved multiple features in complex situations. The authors explore the performance of Random Forest method for NEXRAD radar data quality control. Training datasets are selected using several clear cases of precipitation and non-precipitation (but with some non-meteorological echoes). The model is structured using available candidate features (from the NEXRAD data) such as horizontal reflectivity, differential reflectivity, differential phase shift, copolar correlation coefficient, and their horizontal textures (e.g., local standard deviation). The influence of each feature on classification results are quantified by variable importance measures that are automatically estimated by the Random Forest algorithm. Therefore, the number and types of features in the final forest can be examined based on the classification accuracy. The authors demonstrate the capability of the proposed approach using several cases ranging from distinct to complex rain/no-rain events and compare the performance with the existing algorithms (e

California Air Quality State Implementation Plans; Final Approval; Butte County Air Quality Management District; Stationary Source Permits

Science.gov (United States)

EPA is taking final action to approve a revision to the Butte County Air Quality Management District (BCAQMD) portion of the California State Implementation Plan (SIP). This revision concerns the District's New Source Review (NSR) permitting program.

VGI QUALITY CONTROL

Directory of Open Access Journals (Sweden)

C. C. Fonte

2015-08-01

Full Text Available This paper presents a framework for considering quality control of volunteered geographic information (VGI. Different issues need to be considered during the conception, acquisition and post-acquisition phases of VGI creation. This includes items such as collecting metadata on the volunteer, providing suitable training, giving corrective feedback during the mapping process and use of control data, among others. Two examples of VGI data collection are then considered with respect to this quality control framework, i.e. VGI data collection by National Mapping Agencies and by the most recent Geo-Wiki tool, a game called Cropland Capture. Although good practices are beginning to emerge, there is still the need for the development and sharing of best practice, especially if VGI is to be integrated with authoritative map products or used for calibration and/or validation of land cover in the future.

7 CFR 58.928 - Quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Quality control tests. 58.928 Section 58.928... Procedures § 58.928 Quality control tests. All dairy products and other ingredients shall be subject to inspection for quality and condition throughout each processing operation. Quality control tests shall be...

Expert database system for quality control

Science.gov (United States)

Wang, Anne J.; Li, Zhi-Cheng

1993-09-01

There are more competitors today. Markets are not homogeneous they are fragmented into increasingly focused niches requiring greater flexibility in the product mix shorter manufacturing production runs and above allhigher quality. In this paper the author identified a real-time expert system as a way to improve plantwide quality management. The quality control expert database system (QCEDS) by integrating knowledge of experts in operations quality management and computer systems use all information relevant to quality managementfacts as well as rulesto determine if a product meets quality standards. Keywords: expert system quality control data base

7 CFR 58.335 - Quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Quality control tests. 58.335 Section 58.335... Procedures § 58.335 Quality control tests. All milk, cream and related products are subject to inspection for quality and condition throughout each processing operation. Quality control tests shall be made on flow...

Development of a phantom for quality control of radiosurgery

International Nuclear Information System (INIS)

Scheidegger Soboll, D.; Reuters Schelin, H.

2008-01-01

The aim of this work was to build a phantom for quality control of stereotactic radiosurgery on linear accelerators. The outward appearance is a translucent human head filled with water and enclosing an insert with test objects of known shapes. The phantom was submitted to computerized tomography, magnetic resonance imaging and angiography exams, in order to perform a radiosurgery planning. Contours of the internal structures on the therapy planning system were drawn over the MRI images. Through the image fusion of CT and MRI, the contour data was transferred to CT images. Stereotactic registration of CT and angiography was made. One isocenter treatment was created, and using the stereotactic coordinates given by the therapy planning system, the phantom was placed on a linac. X-ray images were performed in order to verify the final positioning of the planned isocenter. In the whole process the phantom showed usefulness and adequacy for the positioning quality control of stereotactic radiosurgery with linacs, according to the main documents concerning the issue. (author)

Quality control of radiopharmaceuticals

International Nuclear Information System (INIS)

Verdera, E.S.

1994-01-01

The quality control of radiopharmaceuticals is based in physics, physics-chemical and biological controls. Between the different controls can be enumerated the following: visual aspect,side, number of particle beams,activity,purity,ph,isotonicity,sterility,radioinmunoessay,toxicity,stability and clinical essay

7 CFR 58.642 - Quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Quality control tests. 58.642 Section 58.642... Procedures § 58.642 Quality control tests. All mix ingredients shall be subject to inspection for quality and condition throughout each processing operation. Quality control tests shall be made on flow line samples as...

Quality control of nuclear medicine instrumentation

International Nuclear Information System (INIS)

Mould, R.F.

1983-09-01

The proceedings of a conference held by the Hospital Physicists' Association in London 1983 on the quality control of nuclear medicine instrumentation are presented. Section I deals with the performance of the Anger gamma camera including assessment during manufacture, acceptance testing, routine testing and long-term assessment of results. Section II covers interfaces, computers, the quality control problems of emission tomography and the quality of software. Section III deals with radionuclide measurement and impurity assessment and Section IV the presentation of images and the control of image quality. (U.K.)

Quality controls in intensity-modulated conformational radiotherapy. S.F.P.M. report nr 26, January 2010

International Nuclear Information System (INIS)

Valinta, Danielle; Poinsignon, Anne; Caron, Jerome; Dejean, Catherine; Corsetti, Dominique; Marcie, Serge; Mazurier, Jocelyne; Naudy, Suzanne; Aget, Helene; Marchesi, Vincent; Vieillevigne, Laure; Dedieu, Veronique; Bramoule, Celine; Caselles, Olivier; Lacaze, Brigitte; Mazurier, Jocelyne

2009-08-01

This report proposes a comprehensive presentation of the different controls which can be performed for the implementation of 3D intensity-modulated conformal radiation therapy (IMCR). The authors first present the IMCR principle by describing modes of production of modulated beams, the practical realisation of intensity modulation with Multi Leaf Collimator (MLC), multi leaf collimators, and the inverse planning system. They present the quality control of the accelerator (pre-requisites, linearity of the monitor chamber, symmetry and homogeneity), the quality control of multi leaf collimators (prerequisites, leaf absolute calibration, static mode, dynamic mode), the quality control of the treatment planning system (prerequisites, tests specific to IMCR, example in dynamic mode with the chair test), the quality control of the treatment plan (objective, necessary equipment and software solutions, measurement of point absolute dose, control of dose distribution, independent calculation of the number of monitor units), and the treatment verification (pre-treatment verification, patient repositioning during treatment). Finally, they indicate human means required for IMCR implementation, and formulate some recommendations for this implementation

Automated quality control methods for sensor data: a novel observatory approach

Directory of Open Access Journals (Sweden)

J. R. Taylor

2013-07-01

Full Text Available National and international networks and observatories of terrestrial-based sensors are emerging rapidly. As such, there is demand for a standardized approach to data quality control, as well as interoperability of data among sensor networks. The National Ecological Observatory Network (NEON has begun constructing their first terrestrial observing sites, with 60 locations expected to be distributed across the US by 2017. This will result in over 14 000 automated sensors recording more than > 100 Tb of data per year. These data are then used to create other datasets and subsequent "higher-level" data products. In anticipation of this challenge, an overall data quality assurance plan has been developed and the first suite of data quality control measures defined. This data-driven approach focuses on automated methods for defining a suite of plausibility test parameter thresholds. Specifically, these plausibility tests scrutinize the data range and variance of each measurement type by employing a suite of binary checks. The statistical basis for each of these tests is developed, and the methods for calculating test parameter thresholds are explored here. While these tests have been used elsewhere, we apply them in a novel approach by calculating their relevant test parameter thresholds. Finally, implementing automated quality control is demonstrated with preliminary data from a NEON prototype site.

Implantação de um programa de controle de qualidade de um acelerador linear de 6 MeV de fótons Implementation of a quality control program for a 6 MeV linear photon accelerator

Directory of Open Access Journals (Sweden)

Mafalda F. Berdaky

2001-10-01

Full Text Available Este trabalho apresenta a parte operacional do processo final envolvido na implantação de um programa de controle de qualidade por meio de testes rotineiros mecânicos e de radiação. O programa de controle de qualidade, durante 35 meses, mostrou a estabilidade excelente deste acelerador.This paper describes the operational characteristics of the final process of implementation of a quality control program using routine mechanical and radiation tests. The quality control program was performed during 35 months and demonstrated the excellent stability of this accelerator.

INFORMATION SYSTEM QUALITY CONTROL KNOWLEDGE

Directory of Open Access Journals (Sweden)

Vladimir Nikolaevich Babeshko

2017-02-01

Full Text Available The development of the educational system is associated with the need to control the quality of educational services. Quality control knowledge is an important part of the scientific process. The penetration of computers into all areas of activities changing approaches and technologies that previously they were used.

Statistical method for quality control in presence of measurement errors

International Nuclear Information System (INIS)

Lauer-Peccoud, M.R.

1998-01-01

In a quality inspection of a set of items where the measurements of values of a quality characteristic of the item are contaminated by random errors, one can take wrong decisions which are damageable to the quality. So of is important to control the risks in such a way that a final quality level is insured. We consider that an item is defective or not if the value G of its quality characteristic is larger or smaller than a given level g. We assume that, due to the lack of precision of the measurement instrument, the measurement M of this characteristic is expressed by ∫ (G) + ξ where f is an increasing function such that the value ∫ (g 0 ) is known and ξ is a random error with mean zero and given variance. First we study the problem of the determination of a critical measure m such that a specified quality target is reached after the classification of a lot of items where each item is accepted or rejected depending on whether its measurement is smaller or greater than m. Then we analyse the problem of testing the global quality of a lot from the measurements for a example of items taken from the lot. For these two kinds of problems and for different quality targets, we propose solutions emphasizing on the case where the function ∫ is linear and the error ξ and the variable G are Gaussian. Simulation results allow to appreciate the efficiency of the different considered control procedures and their robustness with respect to deviations from the assumptions used in the theoretical derivations. (author)

Austrian Daily Climate Data Rescue and Quality Control

Science.gov (United States)

Jurkovic, A.; Lipa, W.; Adler, S.; Albenberger, J.; Lechner, W.; Swietli, R.; Vossberg, I.; Zehetner, S.

2010-09-01

Checked climate datasets are a "conditio sine qua non" for all projects that are relevant for environment and climate. In the framework of climate change studies and analysis it is essential to work with quality controlled and trustful data. Furthermore these datasets are used as input for various simulation models. In regard to investigations of extreme events, like strong precipitation periods, drought periods and similar ones we need climate data in high temporal resolution (at least in daily resolution). Because of the historical background - during Second World War the majority of our climate sheets were sent to Berlin, where the historical sheets were destroyed by a bomb attack and so important information got lost - only several climate sheets, mostly duplicates, before 1939 are available and stored in our climate data archive. In 1970 the Central Institute for Meteorology and Geodynamics in Vienna started a first attempt to digitize climate data by means of punch cards. With the introduction of a routinely climate data quality control in 1984 we can speak of high-class-checked daily data (finally checked data, quality flag 6). Our group is working on the processing of digitization and quality control of the historical data for the period 1872 to 1983 for 18 years. Since 2007 it was possible to intensify the work (processes) in the framework of an internal project, namely Austrian Climate Data Rescue and Quality Control. The aim of this initiative was - and still is - to supply daily data in an outstanding good and uniform quality. So this project is a kind of pre-project for all scientific projects which are working with daily data. In addition to routine quality checks (that are running since 1984) using the commercial Bull Software we are testing our data with additional open source software, namely ProClim.db. By the use of this spatial and statistical test procedure, the elements air temperature and precipitation - for several sites in Carinthia - could

Assembly and Quality Control of the LHC Cryostats at CERN Motivations, Means, Results and Lessons Learnt

CERN Document Server

Poncet, A; Parma, V; Strubin, P; Tock, JP; Tommasini, D

2007-01-01

In 2001, the project management decided to perform at CERN the final assembly of the LHC superconducting magnets with cryostat parts and cold masses produced by European Industry in large series. This industrial-like production has required a very significant investment in tooling, production facilities, engineering and quality control efforts, in contractual partnership with a consortium of firms. This unusual endeavour of a limited lifetime represented more than 850,000 working hours spanning over five years, the work being done on a result-oriented basis by the contractor. This paper presents the reasons for having conducted this project at CERN, summarizes the work breakdown structure, the production means and methods, the infrastructure specially developed, the tooling, logistics and quality control aspects of the work performed and the results achieved, in analytical form. Finally, the lessons learnt are outlined.

2. Product quality control and assurance system

International Nuclear Information System (INIS)

1990-01-01

Product quality control and assurance are dealt with in relation to reliability in nuclear power engineering. The topics treated include product quality control in nuclear power engineering, product quality assurance of nuclear power plant equipment, quality assurance programs, classification of selected nuclear power equipment, and standards relating to quality control and assurance and to nuclear power engineering. Particular attention is paid to Czechoslovak and CMEA standards. (P.A.). 2 figs., 1 tab., 12 refs

Report of an International Atomic Energy Agency's Advisory Group meeting on ''Quality control of cyclotron-produced radiopharmaceuticals''

International Nuclear Information System (INIS)

Vera-Ruiz, H.; Marcus, C.S.; Pike, V.W.

1990-01-01

The special requirements for the preparation and quality control of cyclotron-produced tracers have been described with particular reference to the production of short-lived positron-emitting radiopharmaceuticals. The regulatory philosophy and training aspects of implementation are considered followed by various aspects of quality of control including good production practice, chemical purity, radionuclide purity, radiochemical purity, specific activity, shelf-life and sterility and apyrogenicity. Finally some organizational aspects such as legal and regulatory aspects, supply of radiopharmaceuticals and professional liability are considered. (UK)

Determination and evaluation of air quality control. Manual of ambient air quality control in Germany

Energy Technology Data Exchange (ETDEWEB)

Lahmann, E.

1997-07-01

Measurement of air pollution emissions and ambient air quality are essential instruments for air quality control. By undertaking such measurements, pollutants are registered both at their place of origin and at the place where they may have an effect on people or the environment. Both types of measurement complement each other and are essential for the implementation of air quality legislation, particularly, in compliance with emission and ambient air quality limit values. Presented here are similar accounts of measurement principles and also contains as an Appendix a list of suitability-tested measuring devices which is based on information provided by the manufacturers. In addition, the guide of ambient air quality control contains further information on discontinuous measurement methods, on measurement planning and on the assessment of ambient air quality data. (orig./SR)

Establishment of a radiotherapy service with a linear accelerator (photons): acceptance tests, dosimetry and quality control

International Nuclear Information System (INIS)

Berdaky, Mafalda Feliciano

2000-01-01

This work presents the operational part of the final process of the establishment of a radiotherapy service with a linear accelerator (6 MeV photon beams), including the acceptance tests, commissioning tests and the implementation of a quality control program through routine mechanical and radiation tests. All acceptance tests were satisfactory, showing results below the allowed limits of the manufacturer, the commissioning tests presented results within those of the international recommendations. The quality control program was performed during 34 months and showed an excellent stability of this accelerator. (author)

30 CFR 74.6 - Quality control.

Science.gov (United States)

2010-07-01

... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Quality control. 74.6 Section 74.6 Mineral... of the CMDPSU will be maintained in production through adequate quality control procedures, MSHA and... DUST SAMPLING DEVICES Approval Requirements for Coal Mine Dust Personal Sampler Unit § 74.6 Quality...

[Quality control in herbal supplements].

Science.gov (United States)

Oelker, Luisa

2005-01-01

Quality and safety of food and herbal supplements are the result of a whole of different elements as good manufacturing practice and process control. The process control must be active and able to individuate and correct all possible hazards. The main and most utilized instrument is the hazard analysis critical control point (HACCP) system the correct application of which can guarantee the safety of the product. Herbal supplements need, in addition to standard quality control, a set of checks to assure the harmlessness and safety of the plants used.

Distributed sensor architecture for intelligent control that supports quality of control and quality of service.

Science.gov (United States)

Poza-Lujan, Jose-Luis; Posadas-Yagüe, Juan-Luis; Simó-Ten, José-Enrique; Simarro, Raúl; Benet, Ginés

2015-02-25

This paper is part of a study of intelligent architectures for distributed control and communications systems. The study focuses on optimizing control systems by evaluating the performance of middleware through quality of service (QoS) parameters and the optimization of control using Quality of Control (QoC) parameters. The main aim of this work is to study, design, develop, and evaluate a distributed control architecture based on the Data-Distribution Service for Real-Time Systems (DDS) communication standard as proposed by the Object Management Group (OMG). As a result of the study, an architecture called Frame-Sensor-Adapter to Control (FSACtrl) has been developed. FSACtrl provides a model to implement an intelligent distributed Event-Based Control (EBC) system with support to measure QoS and QoC parameters. The novelty consists of using, simultaneously, the measured QoS and QoC parameters to make decisions about the control action with a new method called Event Based Quality Integral Cycle. To validate the architecture, the first five Braitenberg vehicles have been implemented using the FSACtrl architecture. The experimental outcomes, demonstrate the convenience of using jointly QoS and QoC parameters in distributed control systems.

Distributed Sensor Architecture for Intelligent Control that Supports Quality of Control and Quality of Service

Directory of Open Access Journals (Sweden)

Jose-Luis Poza-Lujan

2015-02-01

Full Text Available This paper is part of a study of intelligent architectures for distributed control and communications systems. The study focuses on optimizing control systems by evaluating the performance of middleware through quality of service (QoS parameters and the optimization of control using Quality of Control (QoC parameters. The main aim of this work is to study, design, develop, and evaluate a distributed control architecture based on the Data-Distribution Service for Real-Time Systems (DDS communication standard as proposed by the Object Management Group (OMG. As a result of the study, an architecture called Frame-Sensor-Adapter to Control (FSACtrl has been developed. FSACtrl provides a model to implement an intelligent distributed Event-Based Control (EBC system with support to measure QoS and QoC parameters. The novelty consists of using, simultaneously, the measured QoS and QoC parameters to make decisions about the control action with a new method called Event Based Quality Integral Cycle. To validate the architecture, the first five Braitenberg vehicles have been implemented using the FSACtrl architecture. The experimental outcomes, demonstrate the convenience of using jointly QoS and QoC parameters in distributed control systems.

Quality control education in the community college

Science.gov (United States)

Greene, J. Griffen; Wilson, Steve

1966-01-01

This paper describes the Quality Control Program at Daytona Beach Junior College, including course descriptions. The program in quality control required communication between the college and the American Society for Quality Control (ASQC). The college has machinery established for certification of the learning process, and the society has the source of teachers who are competent in the technical field and who are the employers of the educational products. The associate degree for quality control does not have a fixed program, which can serve all needs, any more than all engineering degrees have identical programs. The main ideas which would be common to all quality control programs are the concept of economic control of a repetitive process and the concept of developing individual potentialities into individuals who are needed and productive.

TRAINING SYSTEM OF FUTURE SPECIALISTS: QUALITY CONTROL

Directory of Open Access Journals (Sweden)

Vladimir A. Romanov

2015-01-01

Full Text Available The aim of the investigation is development of innovative strategy of quality control training of engineers and skilled workers (hereinafter – future specialists in educational professional organizations on the principles of social partnership.Methods. Theoretic: theoretic and methodological analysis, polytheoretic synthesis, modeling. Empirical: research and generalization of the system, process and competence – based approaches experience, experiment, observation, surveys, expert evaluation, SWOT-analysis as a method of strategic planning which is to identify the internal and external factors (socio-cultural of the organization surrounding.Results. The strategy of the development of the process of quality control training in educational professional organizations and a predictive model of the system of quality control training for future engineers and workers have been created on the analysis and synthesis of a quantitative specification of the quality, the obtained experience and success in control training of future specialists in educational professional organizations in recent economic and educational conditions.Scientific novelty. There has been built a predicative model of quality control training of future specialists to meet modern standards and the principles of social partnership; the control algorithm of the learning process, developed in accordance with the standards (international of quality ISO in the implementation of the quality control systems of the process approach (matrix-based responsibility, competence and remit of those responsible for the education process in the educational organization, the «problem» terms and diagnostic tools for assessing the quality of professional training of future specialists. The perspective directions of innovation in the control of the quality of future professionals training have been determined; the parameters of a comprehensive analysis of the state of the system to ensure the

14 CFR 145.211 - Quality control system.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Quality control system. 145.211 Section 145...) SCHOOLS AND OTHER CERTIFICATED AGENCIES REPAIR STATIONS Operating Rules § 145.211 Quality control system. (a) A certificated repair station must establish and maintain a quality control system acceptable to...

18 CFR 12.40 - Quality control programs.

Science.gov (United States)

2010-04-01

... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Quality control... PROJECT WORKS Other Responsibilities of Applicant or Licensee § 12.40 Quality control programs. (a... meeting any requirements or standards set by the Regional Engineer. If a quality control program is...

Developing methods of controlling quality costs

Directory of Open Access Journals (Sweden)

Gorbunova A. V.

2017-01-01

Full Text Available The article examines issues of managing quality costs, problems of applying economic methods of quality control, implementation of progressive methods of quality costs management in enterprises with the view of improving the efficiency of their evaluation and analysis. With the aim of increasing the effectiveness of the cost management mechanism, authors introduce controlling as a tool of deviation analysis from the standpoint of the process approach. A list of processes and corresponding evaluation criteria in the quality management system of enterprises is introduced. Authors also introduce the method of controlling quality costs and propose it for the practical application, which allows them to determine useful and unnecessary costs at the existing operating plant. Implementing the proposed recommendations in the system of cost management at an enterprise will allow to improve productivity of processes operating and reduce wasted expense on the quality of the process on the basis of determining values of useful and useless costs of quality according to criteria of processes functioning in the system of quality management.

Computer controlled quality of analytical measurements

International Nuclear Information System (INIS)

Clark, J.P.; Huff, G.A.

1979-01-01

A PDP 11/35 computer system is used in evaluating analytical chemistry measurements quality control data at the Barnwell Nuclear Fuel Plant. This computerized measurement quality control system has several features which are not available in manual systems, such as real-time measurement control, computer calculated bias corrections and standard deviation estimates, surveillance applications, evaluaton of measurement system variables, records storage, immediate analyst recertificaton, and the elimination of routine analysis of known bench standards. The effectiveness of the Barnwell computer system has been demonstrated in gathering and assimilating the measurements of over 1100 quality control samples obtained during a recent plant demonstration run. These data were used to determine equaitons for predicting measurement reliability estimates (bias and precision); to evaluate the measurement system; and to provide direction for modification of chemistry methods. The analytical chemistry measurement quality control activities represented 10% of the total analytical chemistry effort

Quality assurance, quality control and quality audit in diagnostic radiology

International Nuclear Information System (INIS)

Vassileva, J.

2009-01-01

Full text:The lecture aims to present contemporary view of quality assurance in X-Ray diagnosis and its practical realization in Bulgaria. In the lecture the concepts of quality assurance, quality control and clinical audit will be defined and their scope will be considered. An answer of the following questions will be given: why is it necessary to determine the dose of patient in X-ray studies, what is the reference dose level and how it is used for dosimetric quantity which characterized the patient's exposure in X-ray, mammography and CT scans and how they are measured, who conducted the measurement and how to keep the records, what are the variations of doses in identical tests and what defines them? The findings from a national survey of doses in diagnostic radiology, conducted in 2008-2009 and the developed new national reference levels will be presented. The main findings of the first tests of radiological equipment and the future role of quality control as well as the concept of conducting clinical audit and its role in quality assurance are also presented. Quality assurance of the diagnostic process with minimal exposure of patients is a strategic goal whose realization requires understanding, organization and practical action, both nationally and in every hospital. To achieve this the important role of education and training of physicians, radiological technicians and medical physicists is enhanced

Employee quality, monitoring environment and internal control

Directory of Open Access Journals (Sweden)

Chunli Liu

2017-03-01

Full Text Available We investigate the effect of internal control employees (ICEs on internal control quality. Using special survey data from Chinese listed firms, we find that ICE quality has a significant positive influence on internal control quality. We examine the effect of monitoring on this result and find that the effect is more pronounced for firms with strict monitoring environments, especially when the firms implement the Chinese internal control regulation system (CSOX, have higher institutional ownership or attach greater importance to internal control. Our findings suggest that ICEs play an important role in the design and implementation of internal control systems. Our study should be of interest to both top managers who wish to improve corporate internal control quality and regulators who wish to understand the mechanisms of internal control monitoring.

Formulation and quality control of a poly herbal tranquilizer syrup

Directory of Open Access Journals (Sweden)

2017-11-01

Full Text Available Background and objectives: Herbal drugs are rapidly becoming popular in recent years as alternative therapies. Numerous poly herbal formulations, which are combinations of different herbal materials/extracts are being used for prevention or treatment of various disorders. The present research has been undertaken to formulate and evaluate the quality of a tranquilizing syrup based on Iranian traditional medicine references. Methods: A decoction containing Echium amoenum L., Lavandula spp. L., Melissa officinalis L., Cuscuta chinensis Lam, Vitis venifera L.,Prunus domestica and Alhagi camelorum Fisch.was prepared and then filtered. The filtrate was concentrated and different sweeteners and flavoring agents including, brown sugar, honey, masking flavor, sucralose, lemon and orange essential oil were examined to cover the unpleasant taste of the product caused by Cuscuta chinensis. Finally,sucralose was found to be beneficent to cover the unpleasant taste. The final product was evaluated physicochemically and microbiologically according to standard protocols. Results: The results of the quality control assessments demonstrated that the color, odor, microbial and physicochemical characteristics of the syrup were acceptable. Conclusion: The formulated syrup can be examined in in vivo and clinical studies as a tranquilizer with respect to its tranquilizing herbal content.

Problems of quality assurance and quality control in diagnostic radiology

International Nuclear Information System (INIS)

Angerstein, W.

1986-01-01

Topical problems of quality assurance and quality control in diagnostic radiology are discussed and possible solutions are shown. Complex units are differentiated with reference to physicians, technicians, organization of labour, methods of examination and indication. Quality control of radiologic imaging systems should involve three stages: (1) simple tests carried out by radiologic technicians, (2) measurements by service technicians, (3) testing of products by the manufacturer and independent governmental or health service test agencies. (author)

Quality Control in construction.

Science.gov (United States)

1984-01-01

behavioral scientists. In 1962, Dr. Kaoru Ishikawa gave shape to the form of training which featured intradepartmental groups of ten or so workers seated...and Japanese circles bears closer scrutiny. 4.3.1 Japanese Ingredients of Quality The founder of quality circles, Dr. Kaoru Ishikawa , gives six...around 51 a table; hence the name Quality Control Circle. 4 Dr. 0 Ishikawa was an engineering professor at Tokyo University, and the circles were

Establishment for quality control of experimental animal

International Nuclear Information System (INIS)

Kim, Tae Hwan; Kim, Soo Kwan; Kim, Tae Kyoung

1999-06-01

Until now, because we have imported experimental animal from foreign experimental animal corporation, we could have saved money by establishing the quality control of animal in barrier system. In order to improve the quality of animal experiment and efficiency of biomedical study, it is indispensable to control many factors that effect in the experiment. Therefore, it is essential to organize the system of laboratory animal care for enhancing reliability and revivability of experimental results. The purpose of the present investigation was to establish the quality control system of experimental animals that we can provide good quality animals according to the experimental condition of each investigator although the exact quality control system to estimate the infection of bacteria and virus easily remains ill-defined yet. Accordingly, we established the useful quality control system for microbiologic monitoring and environmental monitoring to protect experimental animal from harmful bacteria and virus

Establishment for quality control of experimental animal

Energy Technology Data Exchange (ETDEWEB)

Kim, Tae Hwan; Kim, Soo Kwan; Kim, Tae Kyoung

1999-06-01

Until now, because we have imported experimental animal from foreign experimental animal corporation, we could have saved money by establishing the quality control of animal in barrier system. In order to improve the quality of animal experiment and efficiency of biomedical study, it is indispensable to control many factors that effect in the experiment. Therefore, it is essential to organize the system of laboratory animal care for enhancing reliability and revivability of experimental results. The purpose of the present investigation was to establish the quality control system of experimental animals that we can provide good quality animals according to the experimental condition of each investigator although the exact quality control system to estimate the infection of bacteria and virus easily remains ill-defined yet. Accordingly, we established the useful quality control system for microbiologic monitoring and environmental monitoring to protect experimental animal from harmful bacteria and virus.

Quality control mechanisms of protein biogenesis: proteostasis dies hard

Directory of Open Access Journals (Sweden)

Timothy Jan Bergmann

2016-10-01

Full Text Available The biosynthesis of proteins entails a complex series of chemical reactions that transform the information stored in the nucleic acid sequence into a polypeptide chain that needs to properly fold and reach its functional location in or outside the cell. It is of no surprise that errors might occur that alter the polypeptide sequence leading to a non-functional proteins or that impede delivery of proteins at the appropriate site of activity. In order to minimize such mistakes and guarantee the synthesis of the correct amount and quality of the proteome, cells have developed folding, quality control, degradation and transport mechanisms that ensure and tightly regulate protein biogenesis. Genetic mutations, harsh environmental conditions or attack by pathogens can subvert the cellular quality control machineries and perturb cellular proteostasis leading to pathological conditions. This review summarizes basic concepts of the flow of information from DNA to folded and active proteins and to the variable fidelity (from incredibly high to quite sloppy characterizing these processes. We will give particular emphasis on events that maintain or recover the homeostasis of the endoplasmic reticulum (ER, a major site of proteins synthesis and folding in eukaryotic cells. Finally, we will report on how cells can adapt to stressful conditions, how perturbation of ER homeostasis may result in diseases and how these can be treated.

Quality control for dose calibrators

International Nuclear Information System (INIS)

Mendes, L.C.G.

1984-01-01

Nuclear medicine laboratories are required to assay samples of radioactivity to be administered to patients. Almost universally, these assays are accomplished by use of a well ionization chamber isotope calibrator. The Instituto de Radioprotecao e Dosimetria (Institute for Radiological Protection and Dosimetry) of the Comissao Nacional de Energia Nuclear (National Commission for Nuclear Energy) is carrying out a National Quality Control Programme in Nuclear Medicine, supported by the International Atomic Energy Agency. The assessment of the current needs and practices of quality control in the entire country of Brazil includes Dose Calibrators and Scintillation Cameras, but this manual is restricted to the former. Quality Control Procedures for these Instruments are described in this document together with specific recommendations and assessment of its accuracy. (author)

Development of a quality management system for borehole investigations. (1) Quality assurance and quality control methodology for hydraulic packer testing

International Nuclear Information System (INIS)

Takeuchi, Shinji; Kunimaru, Takanori; Ota, Kunio; Frieg, Bernd

2011-01-01

A quality assurance and quality control (QA/QC) system for the hydraulic packer tests has been established based on the surface-based investigations at JAEA's underground research laboratories in Mizunami and Horonobe. The established QA/QC system covers field investigations (data acquisition) and data analysis. For the field investigations, the adopted procedure is selection of a test section based on a detail fluid logging and checking with tally list, followed by inspection of test tools such as pressure transducers and shut-in valves, etc., test method selection using a 'sequential hydraulic test' for deciding appropriate method, and finally data quality confirmation by pressure changes and derivatives on a log-log plots during testing. Test event logs should also be described during testing for traceability. For the test data analysis, a quick analysis for rough estimation of hydraulic parameters, and a detailed analysis using type curve and/or numerical analyses are conducted stepwise. The established QA/QC system has been applied to the recent borehole investigations and its efficiency has been confirmed. (author)

Quality Control for Expanded Tsetse Production, Sterilization and Field Application

International Nuclear Information System (INIS)

2012-07-01

The use of the sterile insect technique (SIT) for the control of pest insects as part of an integrated, area-wide approach is widely accepted. Its application for the eradication of different tsetse flies, the vectors of human sleeping sickness and African animal trypanosomosis, is attracting increasing interest. Following several initial demonstrations of the application of the SIT for tsetse control the technique was applied on the island of Unguja, Zanzibar, in the mid-1990s and, as the final component of an integrated control programme, led to the eradication of the only tsetse species on the island, Glossina austeni. This successful programme encouraged a number of countries to embark on projects with an SIT component for tsetse control, most Ethiopia. In 2001 the Pan African Tsetse and Trypanosomosis Eradication Campaign (PATTEC) was launched by the Organization of African Unity (now African Union, AU) and, subsequently, six countries obtained funding from the African Development Bank (AfDB) in 2005 to support control programmes with an SIT component. A further six countries have subsequently requested AfDB funding for their programmes. The FAO/IAEA coordinated research project (CRP) on Automation for Tsetse Mass Rearing For Use in Sterile Insect Technique Programmes, which was completed in 2001, led to the development of a semi-automated system for tsetse production. Using this new system, a large rearing facility was established in Addis Ababa, Ethiopia, to supply sterile males for an elimination programme in the southern Rift Valley. The development of large-scale rearing highlighted the need for improved quality control procedures and, with this in mind, the Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture established a CRP in 2003 entitled Improved and Harmonized Quality Control for Expanded Tsetse Production, Sterilization and Field Application with the Objective of Improving and Expanding the Quality Control Sections of the FAO

Quality Control for Expanded Tsetse Production, Sterilization and Field Application

Energy Technology Data Exchange (ETDEWEB)

NONE

2012-07-15

The use of the sterile insect technique (SIT) for the control of pest insects as part of an integrated, area-wide approach is widely accepted. Its application for the eradication of different tsetse flies, the vectors of human sleeping sickness and African animal trypanosomosis, is attracting increasing interest. Following several initial demonstrations of the application of the SIT for tsetse control the technique was applied on the island of Unguja, Zanzibar, in the mid-1990s and, as the final component of an integrated control programme, led to the eradication of the only tsetse species on the island, Glossina austeni. This successful programme encouraged a number of countries to embark on projects with an SIT component for tsetse control, most Ethiopia. In 2001 the Pan African Tsetse and Trypanosomosis Eradication Campaign (PATTEC) was launched by the Organization of African Unity (now African Union, AU) and, subsequently, six countries obtained funding from the African Development Bank (AfDB) in 2005 to support control programmes with an SIT component. A further six countries have subsequently requested AfDB funding for their programmes. The FAO/IAEA coordinated research project (CRP) on Automation for Tsetse Mass Rearing For Use in Sterile Insect Technique Programmes, which was completed in 2001, led to the development of a semi-automated system for tsetse production. Using this new system, a large rearing facility was established in Addis Ababa, Ethiopia, to supply sterile males for an elimination programme in the southern Rift Valley. The development of large-scale rearing highlighted the need for improved quality control procedures and, with this in mind, the Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture established a CRP in 2003 entitled Improved and Harmonized Quality Control for Expanded Tsetse Production, Sterilization and Field Application with the Objective of Improving and Expanding the Quality Control Sections of the FAO

Applications of dimensional micro metrology to the product and process quality control in manufacturing of precision polymer micro components

DEFF Research Database (Denmark)

Tosello, Guido; Hansen, Hans Nørgaard; Gasparin, Stefania

2009-01-01

Precision manufacturing of micro injection moulded (mu IM) components presents challenges in terms of quality control due to the miniaturization of product dimensions and tolerances. This paper addresses product compliance with specifications, focusing on tolerances of dimensions and position on mu...... IM components selected from industrial production. Two systems were analysed: a tactile coordinate measuring machine (CMM) with sub-micrometer uncertainty and an optical CMM allowing fast measurements suitable for in-line quality control. Product quality control capability, measuring uncertainty...... and calibration guidelines are discussed for both systems. Finally, a new approach for the manufacturing of hybrid micro polymer-metal calibrated objects is proposed....

42 CFR 84.256 - Quality control requirements.

Science.gov (United States)

2010-10-01

... 42 Public Health 1 2010-10-01 2010-10-01 false Quality control requirements. 84.256 Section 84.256... § 84.256 Quality control requirements. (a) In addition to the construction and performance requirements specified in §§ 84.251, 84.252, 84.253, 84.254, and 84.255, the quality control requirements in paragraphs...

Sterile kits for the preparation of radiopharmaceuticals: some basic quality control considerations

International Nuclear Information System (INIS)

Briner, W.H.

1975-01-01

Quality control concepts involved in the formulation of radiopharmaceutical kits, as well as all other radiopharmaceuticals, are meant to protect both the patients who receive these products and the practitioners of nuclear medicine who use these products in their practice. These concepts include the adequacy of site and facilities in which these products are formulated, the level of training and experience of personnel responsible for the formulation of the products, quality assurance procedures employed to monitor the acceptability of products, and, finally, a professional dedication to excellence in all these matters. The absence of any of these in a nuclear medicine or radiopharmaceutical program will result in almost certain disaster

Quality control of CT units - methodology of performance I

International Nuclear Information System (INIS)

Prlic, I.; Radalj, Z.

1996-01-01

Increasing use of x-ray computed tomography systems (CT scanners) in the diagnostic requires an efficient means of evaluating the performance of them. Therefore, this paper presents the way to measure (Quality Control procedure-Q/C) and define the CT scanner performance through a special phantom which is based on the recommendation of the American association of Physicists in Medicine (AAPM). The performance parameters measurable with the phantom represent the capability, so periodical evaluation of the parameters enable the users to recognize the stability of the CT scanner no matter on the manufacturer, model or software option of the scanner. There are five important performance parameters which are to be measured: Noise, Contrast scale, Nominal tomographic section thickness, High and Low contrast resolution (MTF). The sixth parameter is, of course the dose per scan and slice which gives the patient dose for the certain diagnostic procedure. The last but not the least parameter is the final image quality which is given through the image processing device connected to the scanner. This is the final medical information needed for the good medical practice according to the Quality Assurance (Q/A) procedures in diagnostic radiology. We have to assure the results of the performance evaluation without environmental influences (the measurements are to be made under the certain conditions according Q/A). This paper will give no detailed methodology recipe but will show on the one example; the system noise measurements and linearity; the need and relevant results of the measurements.1 The rest of the methodology is to be published. (author)

[Application of microscopic spectroscopy in quality control of Niuhuang Qingxin pills].

Science.gov (United States)

Nie, Li-Xing; Zhang, Ye; Zhang, Nan-Ping; Hu, Xiao-Ru; Kang, Shuai; Hou, Jian-Zhong; Dai, Zhong; Ma, Shuang-Cheng

2016-10-01

Application of microscopic spectroscopy in quality control of Niuhuang Qingxin pills was discussed. First, microscopic characteristics specified by the statutory standard of Niuhuang Qingxin pills were summarized. Then new identification method was established for Dioscoreae Rhizoma, Saigae Tataricae Cornu, Cinnamomi Cortex and Saposhnikoviae Radix. Finally, microscopic spectroscopy was used for test of Dioscoreae Rhizoma's adulterant Dioscoreae Fordii Rhizoma.It was the first time for this technology being applied in adulteration test of Chinese patent medicine.The results showed that Saigae Tataricae Cornu was not detected in 2 batches of Niuhuang Qingxin pills from 1 manufacturer while Dioscoreae Fordii Rhizoma was detected in 3 batches of samples from 2 manufacturers. The proposed methods were accurate, simple, rapid, objective and economic, which offered a more comprehensive approach for quality control of Niuhuang Qingxin pills. It was indicated that conventional technology such as microscopic spectroscopy could play an important role in identification of traditional Chinese medicine whose index ingredient was deficient or tiny. Copyright© by the Chinese Pharmaceutical Association.

Employee quality, monitoring environment and internal control

OpenAIRE

Chunli Liu; Bin Lin; Wei Shu

2017-01-01

We investigate the effect of internal control employees (ICEs) on internal control quality. Using special survey data from Chinese listed firms, we find that ICE quality has a significant positive influence on internal control quality. We examine the effect of monitoring on this result and find that the effect is more pronounced for firms with strict monitoring environments, especially when the firms implement the Chinese internal control regulation system (CSOX), have higher institutional ow...

Design of a Quality Control Program for the Measurement of Gross Alpha and Gross Beta Activities (LMPR-CIEMAT); Diseno del Control de Calidad de las Medidas de Actividad Alfa-Beta Total (LMPR-CIEMAT)

Energy Technology Data Exchange (ETDEWEB)

Alvarez, A.; Yague, L.; Gasco, C.; Navarro, N.; Higueras, E.; Noguerales, C.

2010-10-21

In accordance with international standards, general requirements for testing laboratories have to include a quality system for planning, implementing, and assessing the work performed by the organization and for carrying out required quality assurance and quality control. The purpose of internal laboratory quality control is to monitor performance, identify problems, and initiate corrective actions. This report describes the internal quality control to monitor the gross alpha and beta activities determination. Identification of specific performance indicators, the principles that govern their use and statistical means of evaluation are explained. Finally, calculation of alpha and beta specific activities, uncertainties and detection limits are performed. (Author) 10 refs.

Quality control with R an ISO standards approach

CERN Document Server

Cano, Emilio L; Prieto Corcoba, Mariano

2015-01-01

Presenting a practitioner's guide to capabilities and best practices of quality control systems using the R programming language, this volume emphasizes accessibility and ease-of-use through detailed explanations of R code as well as standard statistical methodologies. In the interest of reaching the widest possible audience of quality-control professionals and statisticians, examples throughout are structured to simplify complex equations and data structures, and to demonstrate their applications to quality control processes, such as ISO standards. The volume balances its treatment of key aspects of quality control, statistics, and programming in R, making the text accessible to beginners and expert quality control professionals alike. Several appendices serve as useful references for ISO standards and common tasks performed while applying quality control with R.

[Methodological quality and reporting quality evaluation of randomized controlled trials published in China Journal of Chinese Materia Medica].

Science.gov (United States)

Yu, Dan-Dan; Xie, Yan-Ming; Liao, Xing; Zhi, Ying-Jie; Jiang, Jun-Jie; Chen, Wei

2018-02-01

To evaluate the methodological quality and reporting quality of randomized controlled trials(RCTs) published in China Journal of Chinese Materia Medica, we searched CNKI and China Journal of Chinese Materia webpage to collect RCTs since the establishment of the magazine. The Cochrane risk of bias assessment tool was used to evaluate the methodological quality of RCTs. The CONSORT 2010 list was adopted as reporting quality evaluating tool. Finally, 184 RCTs were included and evaluated methodologically, of which 97 RCTs were evaluated with reporting quality. For the methodological evaluating, 62 trials(33.70%) reported the random sequence generation; 9(4.89%) trials reported the allocation concealment; 25(13.59%) trials adopted the method of blinding; 30(16.30%) trials reported the number of patients withdrawing, dropping out and those lost to follow-up;2 trials （1.09%） reported trial registration and none of the trial reported the trial protocol; only 8(4.35%) trials reported the sample size estimation in details. For reporting quality appraising, 3 reporting items of 25 items were evaluated with high-quality,including: abstract, participants qualified criteria, and statistical methods; 4 reporting items with medium-quality, including purpose, intervention, random sequence method, and data collection of sites and locations; 9 items with low-quality reporting items including title, backgrounds, random sequence types, allocation concealment, blindness, recruitment of subjects, baseline data, harms, and funding;the rest of items were of extremely low quality(the compliance rate of reporting item<10%). On the whole, the methodological and reporting quality of RCTs published in the magazine are generally low. Further improvement in both methodological and reporting quality for RCTs of traditional Chinese medicine are warranted. It is recommended that the international standards and procedures for RCT design should be strictly followed to conduct high-quality trials

A Comparison of Power Quality Controllers

Directory of Open Access Journals (Sweden)

Petr Černek

2012-01-01

Full Text Available This paper focuses on certain types of FACTS (Flexibile AC Transmission System controllers, which can be used for improving the power quality at the point of connection with the power network. It focuses on types of controllers that are suitable for use in large buildings, rather than in transmission networks. The goal is to compare the features of the controllers in specific tasks, and to clarify which solution is best for a specific purpose. It is in some cases better and cheaper to use a combination of controllers than a single controller. The paper also presents the features of a shunt active harmonic compensator, which is a very modern power quality controller that can be used in many cases, or in combination with other controllers. The comparison was made using a matrix diagram that, resulted from mind mapsand other analysis tools. The paper should help engineers to choose the best solution for improving the power quality in a specific power network at distribution level.

quality control

International Nuclear Information System (INIS)

Skujina, A.; Purina, S.; Riekstina, D.

1999-01-01

The optimal objects: soils, spruce needles and bracken ferns were found for the environmental monitoring in the regions of possible radioactive contamination - near SalaspiIs nuclear reactor and Ignalina nuclear power plant. The determination of Sr-90 was based on the radiochemical separation of Sr-90 (=Y-90) by HDEHP extraction and counting the Cerenkov radiation. The quality control of the results was carried out. (authors)

Interaction between bacterial outer membrane proteins and periplasmic quality control factors: a kinetic partitioning mechanism.

Science.gov (United States)

Wu, Si; Ge, Xi; Lv, Zhixin; Zhi, Zeyong; Chang, Zengyi; Zhao, Xin Sheng

2011-09-15

The OMPs (outer membrane proteins) of Gram-negative bacteria have to be translocated through the periplasmic space before reaching their final destination. The aqueous environment of the periplasmic space and high permeability of the outer membrane engender such a translocation process inevitably challenging. In Escherichia coli, although SurA, Skp and DegP have been identified to function in translocating OMPs across the periplasm, their precise roles and their relationship remain to be elucidated. In the present paper, by using fluorescence resonance energy transfer and single-molecule detection, we have studied the interaction between the OMP OmpC and these periplasmic quality control factors. The results of the present study reveal that the binding rate of OmpC to SurA or Skp is much faster than that to DegP, which may lead to sequential interaction between OMPs and different quality control factors. Such a kinetic partitioning mechanism for the chaperone-substrate interaction may be essential for the quality control of the biogenesis of OMPs.

Developing methods of controlling quality costs

OpenAIRE

Gorbunova A. V.; Maximova O. N.; Ekova V. A.

2017-01-01

The article examines issues of managing quality costs, problems of applying economic methods of quality control, implementation of progressive methods of quality costs management in enterprises with the view of improving the efficiency of their evaluation and analysis. With the aim of increasing the effectiveness of the cost management mechanism, authors introduce controlling as a tool of deviation analysis from the standpoint of the process approach. A list of processes and corresponding eva...

Quality assurance and quality control for Hydro-Quebec's ambient air monitoring networks

International Nuclear Information System (INIS)

Lambert, M.; Varfalvy, L.

1993-01-01

Hydro Quebec has three ambient air monitoring networks to determine the contribution of some of its thermal plants to ambient air quality. They are located in Becancour (gas turbines), Iles-de-la-Madeleine (diesel), and Tracy (conventional oil-fired). To ensure good quality results and consistency between networks, a quality assurance/quality control program was set up. A description is presented of the ambient air quality monitoring network and the quality assurance/quality control program. A guide has been created for use by the network operators, discussing objectives of the individual network, a complete description of each network, field operation for each model of instrument in use, treatment of data for each data logger in use, global considerations regarding quality assurance and control, and reports. A brief overview is presented of the guide's purpose and contents, focusing on the field operation section and the sulfur dioxide and nitrogen oxide monitors. 6 figs., 1 tab

Performance and quality control of nuclear medicine instrumentation

International Nuclear Information System (INIS)

Paras, P.

1981-01-01

The status and the recent developments of nuclear medicine instrumentation performance, with an emphasis on gamma-camera performance, are discussed as the basis for quality control. New phantoms and techniques for the measurement of gamma-camera performance parameters are introduced and their usefulness for quality control is discussed. Tests and procedures for dose calibrator quality control are included. Also, the principles of quality control, tests, equipment and procedures for each type of instrument are reviewed, and minimum requirements for an effective quality assurance programme for nuclear medicine instrumentation are suggested. (author)

Frontiers in statistical quality control

CERN Document Server

Wilrich, Peter-Theodor

2004-01-01

This volume treats the four main categories of Statistical Quality Control: General SQC Methodology, On-line Control including Sampling Inspection and Statistical Process Control, Off-line Control with Data Analysis and Experimental Design, and, fields related to Reliability. Experts with international reputation present their newest contributions.

Proteomics Quality Control: Quality Control Software for MaxQuant Results.

Science.gov (United States)

Bielow, Chris; Mastrobuoni, Guido; Kempa, Stefan

2016-03-04

Mass spectrometry-based proteomics coupled to liquid chromatography has matured into an automatized, high-throughput technology, producing data on the scale of multiple gigabytes per instrument per day. Consequently, an automated quality control (QC) and quality analysis (QA) capable of detecting measurement bias, verifying consistency, and avoiding propagation of error is paramount for instrument operators and scientists in charge of downstream analysis. We have developed an R-based QC pipeline called Proteomics Quality Control (PTXQC) for bottom-up LC-MS data generated by the MaxQuant software pipeline. PTXQC creates a QC report containing a comprehensive and powerful set of QC metrics, augmented with automated scoring functions. The automated scores are collated to create an overview heatmap at the beginning of the report, giving valuable guidance also to nonspecialists. Our software supports a wide range of experimental designs, including stable isotope labeling by amino acids in cell culture (SILAC), tandem mass tags (TMT), and label-free data. Furthermore, we introduce new metrics to score MaxQuant's Match-between-runs (MBR) functionality by which peptide identifications can be transferred across Raw files based on accurate retention time and m/z. Last but not least, PTXQC is easy to install and use and represents the first QC software capable of processing MaxQuant result tables. PTXQC is freely available at https://github.com/cbielow/PTXQC .

California State Implementation Plan; Final Approval of Revision; Yolo-Solano Air Quality Management District; Reasonably Available Control Technology Requirements for 1997 8-hour Ozone NAAQS

Science.gov (United States)

EPA is taking final action to approve a revision to the Yolo-Solano Air Quality Management District (YSAQMD) portion of the California SIP concerning YSAQMD regarding RACT)requirements the 1997 8-hour ozone NAAQS and approve negative declarations into SIP.

Modern requirements to quality assurance and control in nuclear fuel fabrication

International Nuclear Information System (INIS)

Weidinger, H.G.

1999-01-01

This lecture have shown a new type of quality assurance management has already successfully introduced in various industries and now starts to be used increasingly in the nuclear fuel industry. Static authority regulations and a tendency to bureaucratic understanding and handling of these regulations lead to a delayed start and a relatively slow progress of these quality strategies in the nuclear fuel technology. However, the economic pressure of strong competition and increasing demands of the utilities as the user of nuclear fuel result in a more determined introduction also to this area. The different use of statistical methods of two different fuel vendors are shown. Vendor A uses old fashioned methods. The focus is on the expensive final product control and few emphasis is on design of experiments and process control. Consequently, this vendor will have high costs, not only for QC and rejection but also for repair and replace actions after delivery. To the contrary, vendor B invests primarily in the design of experiments and process control. This vendor will profit only from lower direct costs but also from being at the front line of technical development and from enjoying a satisfied and happy customer. Many well examined quality management tools are available today which help not only to improve the quality but also decrease the costs. Still, the progress in using these techniques in nuclear fuel technology is limited and not comparable to the progress in other industries like automobile production or the electronic industry. (author)

Biowaste home composting: experimental process monitoring and quality control.

Science.gov (United States)

Tatàno, Fabio; Pagliaro, Giacomo; Di Giovanni, Paolo; Floriani, Enrico; Mangani, Filippo

2015-04-01

Because home composting is a prevention option in managing biowaste at local levels, the objective of the present study was to contribute to the knowledge of the process evolution and compost quality that can be expected and obtained, respectively, in this decentralized option. In this study, organized as the research portion of a provincial project on home composting in the territory of Pesaro-Urbino (Central Italy), four experimental composters were first initiated and temporally monitored. Second, two small sub-sets of selected provincial composters (directly operated by households involved in the project) underwent quality control on their compost products at two different temporal steps. The monitored experimental composters showed overall decreasing profiles versus composting time for moisture, organic carbon, and C/N, as well as overall increasing profiles for electrical conductivity and total nitrogen, which represented qualitative indications of progress in the process. Comparative evaluations of the monitored experimental composters also suggested some interactions in home composting, i.e., high C/N ratios limiting organic matter decomposition rates and final humification levels; high moisture contents restricting the internal temperature regime; nearly horizontal phosphorus and potassium evolutions contributing to limit the rates of increase in electrical conductivity; and prolonged biowaste additions contributing to limit the rate of decrease in moisture. The measures of parametric data variability in the two sub-sets of controlled provincial composters showed decreased variability in moisture, organic carbon, and C/N from the seventh to fifteenth month of home composting, as well as increased variability in electrical conductivity, total nitrogen, and humification rate, which could be considered compatible with the respective nature of decreasing and increasing parameters during composting. The modeled parametric kinetics in the monitored experimental

FINAL IMPLEMENTATION AND PERFORMANCE OF THE LHC COLLIMATOR CONTROL SYSTEM

CERN Document Server

Redaelli, S; Masi, A; Losito, R

2009-01-01

The 2008 collimation system of the CERN Large Hadron Collider (LHC) included 80 movable collimators for a total of 316 degrees of freedom. Before beam operation, the final controls implementation was deployed and commissioned. The control system enabled remote control and appropriate diagnostics of the relevant parameters. The collimator motion is driven with time-functions, synchronized with other accelerator systems, which allows controlling the collimator jaw positions with a micrometer accuracy during all machine phases. The machine protection functionality of the system, which also relies on function-based tolerance windows, was also fully validated. The collimator control challenges are reviewed and the final system architecture is presented. The results of the remote system commissioning and the overall performance are discussed.

7 CFR 58.733 - Quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Quality control tests. 58.733 Section 58.733... Procedures § 58.733 Quality control tests. (a) Chemical analyses. The following chemical analyses shall be... pasteurization by means of the phosphatase test, as well as any other tests necessary to assure good quality...

Descriptive study of the quality control in mammography

International Nuclear Information System (INIS)

Gaona, E.; Perdigon C, G.M.; Casian C, G.A.; Azorin N, J.; Diaz G, J.A.I.; Arreola, M.

2005-01-01

The goal of mammography is to provide contrast between a lesion that is possible residing within the breast and normal surrounding tissue. Quality control is essential for maintaining the contrast imaging performance of a mammography system and incorporate tests that are relevant in that they are predictive of future degradation of contrast imaging performance. These tests will also be done at frequency that is high enough to intercept most drifts in quality imaging or performance before they become diagnostically significant. The quality control study has as objective to describe the results of the assessment of quality imaging elements (film optical density, contrast (density difference), uniformity, resolution and noise) of 62 mammography departments without quality control program and comparison these results with a mammography reference department with a quality control program. When comparing the results they allow seeing the clinical utility of to have a quality control program to reduce the errors of mammography interpretation. (Author)

Quality-control design for surface-water sampling in the National Water-Quality Network

Science.gov (United States)

Riskin, Melissa L.; Reutter, David C.; Martin, Jeffrey D.; Mueller, David K.

2018-04-10

The data-quality objectives for samples collected at surface-water sites in the National Water-Quality Network include estimating the extent to which contamination, matrix effects, and measurement variability affect interpretation of environmental conditions. Quality-control samples provide insight into how well the samples collected at surface-water sites represent the true environmental conditions. Quality-control samples used in this program include field blanks, replicates, and field matrix spikes. This report describes the design for collection of these quality-control samples and the data management needed to properly identify these samples in the U.S. Geological Survey’s national database.

Fact Sheet: Notice of Ambient Water Quality Criteria Document for Tributyltin (TBT) - Final

Science.gov (United States)

Information pertaining to 2004 Final Acute and Chronic Ambient Aquatic Life Water Quality Criteria for Tributyltin (TBT) for freshwater and saltwater. This fact sheet includes the safe levels of TBT that should protect the majority of species.

Quality of Control of Clinical-Biochemical Laboratories – Serbian Case

Directory of Open Access Journals (Sweden)

Vinko Peric

2014-06-01

Full Text Available In the last 20 years in medical laboratories, numerous activities regarding quality and accreditation system were taken. Approach to this problem in European countries is different, so the task of the Accreditation Work Group of the Confederation of European societies for clinical chemistry (EC 4 to help the efforts to harmonize this issue. External quality control in clinical-chemical laboratories imposed the need for the implementation of quality management system. »Good laboratory practice« and its principles were adopted by nominated bodies, both international and national. In the beginning, the standard ISO 9001 was applied for certification and for accreditation EN 45001 and ISO Guide 25, which are prepared for testing and calibration laboratories. Standard ISO 17025 is the successor of the previous documents and for now it is a reference for mentioned laboratories. Accreditation Work Group of the Confederation of European societies for clinical chemistry (EC 4 made an amendment of the requirements for medical laboratories, which this standard describes. Standard draft ISO 15189 was adopted on February 2003 as a final version with requirements for medical laboratories.

42 CFR 84.40 - Quality control plans; filing requirements.

Science.gov (United States)

2010-10-01

... 42 Public Health 1 2010-10-01 2010-10-01 false Quality control plans; filing requirements. 84.40... Control § 84.40 Quality control plans; filing requirements. As a part of each application for approval or... proposed quality control plan which shall be designed to assure the quality of respiratory protection...

30 CFR 28.30 - Quality control plans; filing requirements.

Science.gov (United States)

2010-07-01

... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Quality control plans; filing requirements. 28... PROTECTION FOR TRAILING CABLES IN COAL MINES Quality Control § 28.30 Quality control plans; filing... part, each applicant shall file with MSHA a proposed quality control plan which shall be designed to...

Quality control of structural MRI images applied using FreeSurfer - a hands-on workflow to rate motion artifacts

Directory of Open Access Journals (Sweden)

Lea Luise Backhausen

2016-12-01

Full Text Available In structural magnetic resonance imaging motion artifacts are common, especially when not scanning healthy young adults. It has been shown that motion affects the analysis with automated image-processing techniques (e.g. FreeSurfer. This can bias results. Several developmental and adult studies have found reduced volume and thickness of gray matter due to motion artifacts. Thus, quality control is necessary in order to ensure an acceptable level of quality and to define exclusion criteria of images (i.e. determine participants with most severe artifacts. However, information about the quality control workflow and image exclusion procedure is largely lacking in the current literature and the existing rating systems differ. Here we propose a stringent workflow of quality control steps during and after acquisition of T1-weighted images, which enables researchers dealing with populations that are typically affected by motion artifacts to enhance data quality and maximize sample sizes. As an underlying aim we established a thorough quality control rating system for T1-weighted images and applied it to the analysis of developmental clinical data using the automated processing pipeline FreeSurfer. This hands-on workflow and quality control rating system will aid researchers in minimizing motion artifacts in the final data set, and therefore enhance the quality of structural magnetic resonance imaging studies.

Protein quality control in the nucleus

DEFF Research Database (Denmark)

Nielsen, Sofie V.; Poulsen, Esben Guldahl; Rebula, Caio A.

2014-01-01

to aggregate, cells have evolved several elaborate quality control systems to deal with these potentially toxic proteins. First, various molecular chaperones will seize the misfolded protein and either attempt to refold the protein or target it for degradation via the ubiquitin-proteasome system...... to be particularly active in protein quality control. Thus, specific ubiquitin-protein ligases located in the nucleus, target not only misfolded nuclear proteins, but also various misfolded cytosolic proteins which are transported to the nucleus prior to their degradation. In comparison, much less is known about...... these mechanisms in mammalian cells. Here we highlight recent advances in our understanding of nuclear protein quality control, in particular regarding substrate recognition and proteasomal degradation....

21 CFR 211.22 - Responsibilities of quality control unit.

Science.gov (United States)

2010-04-01

... 21 Food and Drugs 4 2010-04-01 2010-04-01 false Responsibilities of quality control unit. 211.22... Personnel § 211.22 Responsibilities of quality control unit. (a) There shall be a quality control unit that... have been fully investigated. The quality control unit shall be responsible for approving or rejecting...

40 CFR 81.112 - Charleston Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.112 Charleston Intrastate Air Quality Control Region. The Charleston Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... Quality Control Region: Region 1. 81.107Greenwood Intrastate Air Quality Control Region: Region 2. 81...

78 FR 12243 - Interim Final Determination To Stay and Defer Sanctions, Placer County Air Pollution Control...

Science.gov (United States)

2013-02-22

...EPA is making an interim final determination to stay the imposition of offset sanctions and to defer the imposition of highway sanctions based on a proposed approval of a revision to the Placer County Air Pollution Control District (PCAPCD) and Feather River Air Quality Management District (FRAQMD) portion of the California State Implementation Plan (SIP) published elsewhere in this Federal Register. The SIP revision concerns two permitting rules submitted by the PCAPCD and FRAQMD, respectively: Rule 502, New Source Review, and Rule 10.1, New Source Review.

40 CFR 81.88 - Billings Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.88 Billings Intrastate Air Quality Control Region. The Metropolitan Billings Intrastate Air Quality Control Region (Montana) has been renamed the Billings Intrastate Air Quality Control... to by Montana authorities as follows: Sec. 481.168Great Falls Intrastate Air Quality Control Region...

Guidelines for Quality Control of Equipment Used in Diagnostic Radiology in the Netherlands

International Nuclear Information System (INIS)

Berg, L. van den; Aarts, C.N.M.; Beentjes, L.B.; Dalen, A. van; Elsakkers, P.; Julius, H.W.; Kicken, P.J.H.; Meer, F. van der; Teeuwisse, W.; Thijssen, M.A.O.; Zoetelief, J.

1998-01-01

The Dutch working group on 'Quality Criteria for Equipment Used in Diagnostic Radiology' has formulated guidelines providing technical criteria for equipment used in conventional diagnostic radiology. These guidelines are applicable to the technical parameters having a major impact on image quality and patient dose and include methods for testing. The following parameters are included: tube voltage, automatic exposure control, film processing, film-screen combination, light tightness and illumination of the dark room, half-value layer and filtration, light field, grid, focal spot size, viewing boxes and geometrical indicators. Each guideline consists of the following chapters: (1) Scope and field of application, (2) Background information, (3) Test procedure, (4) Test frequency, (5) Registration of observations, (6) Evaluation and interpretation, (7) Test report. Chapter 3 includes both the principles of the test method and a step by step description of the procedures. The principles of the test procedure provide a basis for adaptation to local circumstances. The step by step test procedure allows a quality control measurement to be performed with limited physical knowledge of the equipment. Chapter 6 includes limiting values. Draft guidelines were evaluated in practice in 20 hospitals. The final document has been accepted by the professional societies in the Netherlands and the Dutch Minister of Health as a reference set of tools to perform Quality Control of equipment used for conventional diagnostic radiology. (author)

Intra- and Intercellular Quality Control Mechanisms of Mitochondria

Directory of Open Access Journals (Sweden)

Yoshimitsu Kiriyama

2017-12-01

Full Text Available Mitochondria function to generate ATP and also play important roles in cellular homeostasis, signaling, apoptosis, autophagy, and metabolism. The loss of mitochondrial function results in cell death and various types of diseases. Therefore, quality control of mitochondria via intra- and intercellular pathways is crucial. Intracellular quality control consists of biogenesis, fusion and fission, and degradation of mitochondria in the cell, whereas intercellular quality control involves tunneling nanotubes and extracellular vesicles. In this review, we outline the current knowledge on the intra- and intercellular quality control mechanisms of mitochondria.

Fuel cycle and quality control

International Nuclear Information System (INIS)

Stoll, W.

1979-01-01

The volume of the fuel cycle is described in its economic importance and its through put, as it is envisaged for the Federal Republic of Germany. Definitions are given for quality continuing usefulness of an object and translated into quality criteria. Requirements on performance of fuel elements are defined. The way in which experimental results are translated into mass production of fuel rods, is described. The economic potential for further quality effort is derived. Future ways of development for quality control organisation and structure are outlined. (Auth.)

Controle de qualidade e artefatos em mamografia Quality control and artifacts in mammography

Directory of Open Access Journals (Sweden)

Flávio Augusto Ataliba Caldas

2005-08-01

Full Text Available A mamografia, na atualidade, é o método mais efetivo de diagnóstico precoce do câncer de mama. Um exame com alto padrão de qualidade pode visualizar, em 85% a 90% dos casos, um tumor com mais de dois anos de antecedência de ocorrer acometimento ganglionar, em mulheres com mais de 50 anos de idade. A diferença radiográfica entre o tecido normal e o doente é extremamente tênue, logo, a alta qualidade do exame é indispensável para alcançar resolução de alto contraste que permita essa diferenciação. Para alcançar alto padrão é imperativo que o exame mamográfico siga protocolos rígidos e pré-estabelecidos. Os artefatos são defeitos no processamento do filme que comprometem o resultado final da imagem, podendo resultar em informações perdidas ou mascaradas. Há numerosos tipos de artefatos derivados de diversas fontes na aquisição da imagem, como o processador, o desempenho do técnico de radiologia, o mamógrafo ou o paciente, todos resultando na degradação da imagem obtida. O presente artigo tem o objetivo de revisar métodos eficazes no controle de qualidade do exame mamográfico e analisar os artefatos mais importantes na prática diária, com ilustrações e dicas de como evitá-los.Currently, mammography is the most effective method for an early diagnosis of breast cancer. In 85% to 90% of the cases, a high quality mammography allows the visualization of a tumor more than two years before the occurrence of lymph nodes involvement in women over 50 years of age. The radiological appearance of a normal and a sick tissue is very similar, therefore, a high quality of the scan is essential to obtain high contrast resolution to allow distinguishing them. Strict and preestablished protocols must be followed during mammography in order to reach high quality standards. Artifacts are defects occurred during film processing that interfere in the quality of the final image and can result in loss or masked information. Several

Virtualized Network Control. Final Report

Energy Technology Data Exchange (ETDEWEB)

Ghani, Nasir [Univ. of New Mexico, Albuquerque, NM (United States)

2013-02-01

This document is the final report for the Virtualized Network Control (VNC) project, which was funded by the United States Department of Energy (DOE) Office of Science. This project was also informally referred to as Advanced Resource Computation for Hybrid Service and TOpology NEtworks (ARCHSTONE). This report provides a summary of the project's activities, tasks, deliverable, and accomplishments. It also provides a summary of the documents, software, and presentations generated as part of this projects activities. Namely, the Appendix contains an archive of the deliverables, documents, and presentations generated a part of this project.

A quality control atlas for scintillation camera systems

International Nuclear Information System (INIS)

Busemann Sokole, E.; Graham, L.S.; Todd-Pokropek, A.; Wegst, A.; Robilotta, C.C.

2002-01-01

Full text: The accurate interpretation of quality control and clinical nuclear medicine image data is coupled to an understanding of image patterns and quantitative results. Understanding is gained by learning from different examples, and knowledge of underlying principles of image production. An Atlas of examples has been created to assist with interpreting quality control tests and recognizing artifacts in clinical examples. The project was initiated and supported by the International Atomic Energy Agency (IAEA). The Atlas was developed and written by Busemann Sokole from image examples submitted from nuclear medicine users from around the world. The descriptive text was written in a consistent format to accompany each image or image set. Each example in the atlas finally consisted of the images; a brief description of the data acquisition, radionuclide/radiopharmaceutical, specific circumstances under which the image was produced; results describing the images and subsequent conclusions; comments, where appropriate, giving guidelines for follow-up strategies and trouble shooting; and occasional literature references. Hardcopy images required digitizing into JPEG format for inclusion into a digital document. Where possible, an example was contained on one page. The atlas was reviewed by an international group of experts. A total of about 250 examples were compiled into 6 sections: planar, SPECT, whole body, camera/computer interface, environment/radioactivity, and display/hardcopy. Subtle loss of image quality may be difficult to detect. SPECT examples, therefore, include simulations demonstrating effects of deterioration in camera performance (e.g. center-of-rotation offset, non-uniformity) or suboptimal clinical performance. The atlas includes normal results, results from poor adjustment of the camera system, poor results obtained at acceptance testing, artifacts due to system malfunction, and artifacts due to environmental situations. Some image patterns are

7 CFR 58.141 - Alternate quality control program.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Alternate quality control program. 58.141 Section 58... Service 1 Quality Specifications for Raw Milk § 58.141 Alternate quality control program. When a plant has in operation an acceptable quality program, at the producer level, which is approved by the...

Quality control of 11C-carfentanil

International Nuclear Information System (INIS)

Zhang Xiaojun; Zhang Jinming; Tian Jiahe; Xiang Xiaohui

2013-01-01

To study the quality control of 11 C-Carfentanil injection, physical, chemical and biological identification were used. The chemical and radiochemical purity of 11 C-Carfentanil Injection were detected by HPLC and Flower Count system; measured the quantity of product by LC-MS, specific activity was calculated later; The PTS was used to detect endotoxin, and other quality control methods were put up to guarantee the security of its clinical application. The produce appeared colorless and transparent, the radiochemical purity was more than 98%, content of the endotoxin was less than 5 EU/mL. The result showed that 11 C-Carfentanil injection had fulfilled pharmaceutical quality control request and could be applied safely to animal experiment and clinical diagnosis. (authors)

Water quality control system and water quality control method

International Nuclear Information System (INIS)

Itsumi, Sachio; Ichikawa, Nagayoshi; Uruma, Hiroshi; Yamada, Kazuya; Seki, Shuji

1998-01-01

In the water quality control system of the present invention, portions in contact with water comprise a metal material having a controlled content of iron or chromium, and the chromium content on the surface is increased than that of mother material in a state where compression stresses remain on the surface by mechanical polishing to form an uniform corrosion resistant coating film. In addition, equipments and/or pipelines to which a material controlling corrosion potential stably is applied on the surface are used. There are disposed a cleaning device made of a material less forming impurities, and detecting intrusion of impurities and removing them selectively depending on chemical species and/or a cleaning device for recovering drain from various kinds of equipment to feedwater, connecting a feedwater pipeline and a condensate pipeline and removing impurities and corrosion products. Then, water can be kept to neutral purified water, and the concentrations of oxygen and hydrogen in water are controlled within an optimum range to suppress occurrence of corrosion products. (N.H.)

Internal quality control of PCR-based genotyping methods

DEFF Research Database (Denmark)

Bladbjerg, Else-Marie; Gram, Jørgen; Jespersen, Jørgen

2002-01-01

Internal quality control programmes for genetic analyses are needed. We have focused on quality control aspects of selected polymorphism analyses used in thrombosis research. DNA was isolated from EDTA-blood (n = 500) and analysed for 18 polymorphisms by polymerase chain reaction (PCR), i...... because of positive reagent blanks (controls (Control of data handling revealed 0.1% reading mistakes and 0.5% entry mistakes. Based on our experiences, we propose an internal quality control programme......, electrophoresis (analytical factors), result reading and entry into a database (post-analytical factors). Furthermore, we evaluated a procedure for result confirmation. Isolated DNA was of good quality (42 micrograms/ml blood, A260/A280 ratio > 1.75, negative DNAsis tests). Occasionally, results were reanalysed...

40 CFR 81.36 - Maricopa Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.36 Maricopa Intrastate Air Quality Control Region. The Phoenix-Tucson Intrastate Air Quality Control Region has been renamed the Maricopa Intrastate Air Quality Control Region... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Maricopa Intrastate Air Quality...

The final word. OSHA's final ruling offers firm deadlines for infection control.

Science.gov (United States)

West, K

1992-03-01

Departments that have put off program development while waiting for the final ruling to be published have a lot of work to do. Many departments have been cited and fined by OSHA in the past year for failure to begin infection-control programs or provide hepatitis-B vaccines to personnel. Under the new budget, OSHA was granted permission to up its fine structure sevenfold--thus, a small fine is $7,000, and the highest fine for a single violation is $70,000. Fines can have a greater impact on a department's budget than implementation of the program over time. A key point to remember is that a strong infection-control program will reduce exposure follow-up costs and worker-compensation claims. Infection control is a win-win situation.

Quality Control - Nike.Inc

OpenAIRE

Walter G. Bishop

2017-01-01

The purpose of this paper is to present the illustration of quality control approach, which has been adopted by several organizations, in order to manage and improve their production processes. The approach is referred as total quality management (TQM). This study will discuss the implementation of TQ, within the working environment of Nike Inc. One of the major objectives behind the implementation of TQ is to reduce or completely eliminate potential errors and flaws, within the manufacturing...

How to set up and manage quality control and quality assurance

NARCIS (Netherlands)

Visschedijk, M.; Hendriks, R.; Nuyts, K.

2005-01-01

This document provides a general introduction to clarify the differences between quality control (QC) and quality assurance (QA). In addition it serves as a starting point for implementing a quality system approach within an organization. The paper offers practical guidance to the implementation of

Influence of the profile of Iridium-192 wire in measurements of quality control for use in brachytherapy

International Nuclear Information System (INIS)

Costa, Osvaldo L.; Zeituni, Carlos A.; Rostelato, Maria Elisa C.M.; Moura, Joao A.; Feher, Anselmo; Moura, Eduardo S.; Souza, Carla D.; Somessari, Samir L.; Peleias Junior, Fernando S.; Mattos, Fabio R.

2013-01-01

Brachytherapy is a method used in the treatment of cancerous tumors, by ionizing radiation produced by sources, introduced into the tumor area, this method seeks a more direct to the tumor, thereby maximizing the radiation dose to diseased tissue, while minimizing the dose to healthy tissues. One of the radionuclides used in brachytherapy is iridium-192. The Radiation Technology Center (CTR), of the Nuclear and Energy Research Institute (IPEN), has produced commercially, since 1998, iridium-192 wires used in low dose rate (LDR) brachytherapy. To produce this radionuclides, firstly an iridium-platinum wire is irradiated in the nuclear reactor IEA-R1 for 30 hours, with a neutron flux of 5x 10 13 n cm -2 s -1 , the wire is left to decay by 30 days to remove the main contaminants, and then goes through a quality control, before being sent to the hospital. In this quality control is checked the radiation homogeneity along each centimeter of the wire. To implement this procedure, is used a device, consisting of an ionization chamber, surrounded by a lead shield, with a samol 1 cm wide slit, linked to the ionization chamber is a voltage source, and a Keithley 617 electrometer, 2 minutes is the range used to measure the charge by the electrometer. The iridium wire is considered in accordance, when there is no variation higher than 5%, between the average measures and the maximum and minimum values. However, due to design features of the measurement system, the wire may appear to the detector through the slit in larger sizes than the ideal, improperly influencing the final quality control. This paper calculates the difference in size of these variations in profile, and their influence on the final count, it compares the actual values obtained, and describes the improvements, made in quality control procedures, that provided more accurate measurement data, analyzes the results, and suggests changes in devices, aimed at further improving the quality control of iridium-192

40 CFR 81.77 - Puerto Rico Air Quality Control Region.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Puerto Rico Air Quality Control Region... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.77 Puerto Rico Air Quality Control Region. The Puerto Rico Air Quality Control Region...

21 CFR 111.105 - What must quality control personnel do?

Science.gov (United States)

2010-04-01

... 21 Food and Drugs 2 2010-04-01 2010-04-01 false What must quality control personnel do? 111.105..., LABELING, OR HOLDING OPERATIONS FOR DIETARY SUPPLEMENTS Production and Process Control System: Requirements for Quality Control § 111.105 What must quality control personnel do? Quality control personnel must...

The Study on quality control of nuclear power installation project

International Nuclear Information System (INIS)

Wu Jie

2008-01-01

The quality planning, quality assurance and quality control are discussed by applying the quality control (QC) theory and combining the real situation of the Qinshan II project. This paper is practical and plays an active role in instruction of project quality control by applying the above QC theory and control techniques. (authors)

Internal control reporting and accounting quality : Insight "comply-or-explain" internal control regime

OpenAIRE

Cao Thi Thanh, Huyen; Cheung, Tina

2010-01-01

Nowadays, there exist two reporting regimes, rules-based and principle-based (comply-or-explain). In the rules-based environment, researchers have studied the relationship between internal control quality and accounting quality. Prior studies have suggested that reports on internal control are an effective way for investors to evaluate the quality of the firm‟s internal control. By having a sound system of internal control, it creates reliance upon the firm‟s financial reporting. Therefore, t...

The results of a quality-control programme in mammography

International Nuclear Information System (INIS)

Ramsdale, M.L.; Hiles, P.A.

1989-01-01

With the introduction of a breast screening programme in the UK, quality assurance in mammography is of paramount importance in assuring optimum imaging performance with low dose. Quality control checks are an essential part of the quality-assurance system. A quality-control programme at a breast screening clinic is described. Daily checks include film sensitometry for X-ray processor control and radiography of a lucite phantom to monitor the consistency of the X-ray machine automatic exposure control. Weekly checks include additional measurements on the performance of the automatic exposure control for different breast thickness and an overall assessment of image quality using a prototype mammography test phantom. The test phantom measures low-contrast sensitivity, high-contrast resolution and small-detail visibility. The results of the quality-control programme are presented with particular attention paid to tolerances and limiting values. (author)

A Total Quality-Control Plan with Right-Sized Statistical Quality-Control.

Science.gov (United States)

Westgard, James O

2017-03-01

A new Clinical Laboratory Improvement Amendments option for risk-based quality-control (QC) plans became effective in January, 2016. Called an Individualized QC Plan, this option requires the laboratory to perform a risk assessment, develop a QC plan, and implement a QC program to monitor ongoing performance of the QC plan. Difficulties in performing a risk assessment may limit validity of an Individualized QC Plan. A better alternative is to develop a Total QC Plan including a right-sized statistical QC procedure to detect medically important errors. Westgard Sigma Rules provides a simple way to select the right control rules and the right number of control measurements. Copyright © 2016 Elsevier Inc. All rights reserved.

Control of quality in mammography

International Nuclear Information System (INIS)

2006-10-01

The present protocol of quality control/quality assurance in mammography is the result of the work of two regional projects realised in Latin America within the frame of ARCAL with the support of the IAEA. The first is ARCAL LV (RLA/6/043) project on quality assurance/quality control in mammography studies which analysed the present situation of the mammography in the member countries of the project which include: Bolivia, Colombia, Costa Rica, Cuba, El Salvador, Guatemala, Nicaragua, Panama, Paraguay, Peru, Dominican Republic and Republic of Venezuela and the second is ARCAL XLIX (RLA/9/035) project, whose members were Brazil, Colombia, Cuba, Chile, Mexico, and Peru, worked the application of Basic Safety Standards for the protection against ionising radiation with the aim to improve radiation protection in X-ray diagnosis medical practices through the implementation of the Basic Safety Standards (BSS) related to x-ray diagnosis in selected hospitals located in each country involved in the project. The work of both projects had been consolidated and harmonized in the present publication

76 FR 57646 - Final Withdrawal of Certain Federal Aquatic Life Water Quality Criteria Applicable to Wisconsin

Science.gov (United States)

2011-09-16

... Final Withdrawal of Certain Federal Aquatic Life Water Quality Criteria Applicable to Wisconsin AGENCY... aquatic life water quality criteria applicable to Wisconsin? C. Why is the EPA not withdrawing Wisconsin's chronic endrin aquatic life use criterion for waters designated as Warm Water Sportfish and Warm Water...

The study on quality control of bedside CR examination

International Nuclear Information System (INIS)

Yang Xufeng; Luo Xiaomei; Xu Qiaolan; Wu Tengfang; Wen Xingwei

2007-01-01

Objective: To study the quality controll of bedside CR examination and improves the imaging quality. Methods: X-ray examination with CR system were performed on 3,300 patients. All CR cassettes were encoded. The imaging plate and cassettes were cleaned regularly. Results: With and without quality control, the percentage of first-rate film was 58.2% and 51%, the second-rate film was 40% and 45.5%, the third-rate film was 1.3% and 2%, respectively. Corxespondingly, the ratio of re-examination decreased from 1.5% to 0.5% after quality control, and imaging quality was stable. Conclusion: The quality control of bedside CR examination can improve the image quality as well as lighten the labor of radiographers. (authors)

Quality assurance/quality control, reliability and availability of nuclear power plants

International Nuclear Information System (INIS)

Kueffer, K.

1981-01-01

In a first part this lectures will present a survey on nuclear power production and plant performance in the Western World and discuss key parameters such as load factors and non-availability. Some main reasons for reliable performance of nuclear power plants are given. The second part of this lecture deals with the question how quality assurance and quality control measures do directly influence plant reliability, availability and, thus, economy. Derived from worldwide experience gained from operating nuclear power plants, it may be concluded that the implementation of an overall quality assurance programme does not only satisfy safety requirements set forth by the nuclear regulatory bodies, but has also a considerable impact on plant reliability and availability. A positive effect on these figures will be achieved if the established quality assurance programme provides for a coordinated approach to all activities affecting quality. It is discussed how the quality of a product should be controlled and what kind of quality assurance measures by performed examples are given to demonstrate that the expenditure for maintenance work on components will decrease if planned and systematic quality assurance actions have been implemented during all procurement stages. (orig./RW)

Quality assurance and quality control programme in use at the individual monitoring service of ITN-DPRSN

Energy Technology Data Exchange (ETDEWEB)

Alves, J.G.; Novais, I.; Rangel, S.; Flores, E. [Instituto Tecnologico e Nuclear, Dept. de Proteccao Radiologica e Seguranca Nuclear Estrada Nacional, Sacavem (Portugal)

2006-07-01

The Individual Monitoring Service (I.M.S.) of the Departamento de Proteccao Radiologica e Seguranca Nuclear (D.P.R.S.N.) at the Instituto Tecnologico e Nuclear (I.T.N.) in Portugal operates a thermoluminescence dosimetry system to monitor approximately 3,000 workers for external radiation exposure on a monthly basis. The workers come from nearly 230 facilities in the medical, research and conventional industry fields of activity and almost 85% of the people monitored in 2005 are from medical facilities. The TLD system in use is based on two Harshaw 6600 automatic readers and on the Harshaw 8814 T.L. card and holder containing two detector elements of LiF:Mg,Ti (TLD-100) for the evaluation of Hp(10) and Hp(0.07). All the workers are monitored on a monthly basis using whole body dosemeters. The I.M.S. has implemented a Quality Assurance and Quality Control (Q.A./Q.C.) programme that covers all the aspects of monitoring, from the monitoring request of a customer to the final issue of a dose report. The main aspects of the Q.A./Q.C. programme implemented at the I.M.S. will be presented in this paper using fluxograms and schemes. Several issues will be addressed, e.g., administrative procedures, technical procedures, dealing with complaints, training of staff, etc. The relationship of the I.M.S. with external entities like the customer, the regulatory authority, the central dose registry, the calibration facility, suppliers, maintenance providers, etc. will be mentioned on the administrative procedures described as well as on the technical procedures where applicable. The main technical procedures will be presented in this paper and references will be made to a TLD Quality Control database internally developed and designed for the storage of important Q.C. parameters like the element correction coefficients, reader calibration factors, electronic quality control data generated on a daily basis, and the study of their evolution with time. (author)

Quality assurance and quality control programme in use at the individual monitoring service of ITN-DPRSN

International Nuclear Information System (INIS)

Alves, J.G.; Novais, I.; Rangel, S.; Flores, E.

2006-01-01

The Individual Monitoring Service (I.M.S.) of the Departamento de Proteccao Radiologica e Seguranca Nuclear (D.P.R.S.N.) at the Instituto Tecnologico e Nuclear (I.T.N.) in Portugal operates a thermoluminescence dosimetry system to monitor approximately 3,000 workers for external radiation exposure on a monthly basis. The workers come from nearly 230 facilities in the medical, research and conventional industry fields of activity and almost 85% of the people monitored in 2005 are from medical facilities. The TLD system in use is based on two Harshaw 6600 automatic readers and on the Harshaw 8814 T.L. card and holder containing two detector elements of LiF:Mg,Ti (TLD-100) for the evaluation of Hp(10) and Hp(0.07). All the workers are monitored on a monthly basis using whole body dosemeters. The I.M.S. has implemented a Quality Assurance and Quality Control (Q.A./Q.C.) programme that covers all the aspects of monitoring, from the monitoring request of a customer to the final issue of a dose report. The main aspects of the Q.A./Q.C. programme implemented at the I.M.S. will be presented in this paper using fluxograms and schemes. Several issues will be addressed, e.g., administrative procedures, technical procedures, dealing with complaints, training of staff, etc. The relationship of the I.M.S. with external entities like the customer, the regulatory authority, the central dose registry, the calibration facility, suppliers, maintenance providers, etc. will be mentioned on the administrative procedures described as well as on the technical procedures where applicable. The main technical procedures will be presented in this paper and references will be made to a TLD Quality Control database internally developed and designed for the storage of important Q.C. parameters like the element correction coefficients, reader calibration factors, electronic quality control data generated on a daily basis, and the study of their evolution with time. (author)

40 CFR 81.51 - Portland Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.51 Portland Interstate Air Quality Control Region. The Portland Interstate Air Quality Control Region (Oregon-Washington) has been revised to consist of the territorial area... Portland Interstate Air Quality Control Region (Oregon-Washington) will be referred to by Washington...

Quality assurance in education: The role of ICT and quality control ...

African Journals Online (AJOL)

Quality assurance in education is perceived in this paper to be a product of the impact of information and communication technologies as well as the statutory control measures especially in tertiary institutions in Nigeria. The paper reviews the concept of quality and quality assurance and their general application to ...

PACS quality control and automatic problem notifier

Science.gov (United States)

Honeyman-Buck, Janice C.; Jones, Douglas; Frost, Meryll M.; Staab, Edward V.

1997-05-01

One side effect of installing a clinical PACS Is that users become dependent upon the technology and in some cases it can be very difficult to revert back to a film based system if components fail. The nature of system failures range from slow deterioration of function as seen in the loss of monitor luminance through sudden catastrophic loss of the entire PACS networks. This paper describes the quality control procedures in place at the University of Florida and the automatic notification system that alerts PACS personnel when a failure has happened or is anticipated. The goal is to recover from a failure with a minimum of downtime and no data loss. Routine quality control is practiced on all aspects of PACS, from acquisition, through network routing, through display, and including archiving. Whenever possible, the system components perform self and between platform checks for active processes, file system status, errors in log files, and system uptime. When an error is detected or a exception occurs, an automatic page is sent to a pager with a diagnostic code. Documentation on each code, trouble shooting procedures, and repairs are kept on an intranet server accessible only to people involved in maintaining the PACS. In addition to the automatic paging system for error conditions, acquisition is assured by an automatic fax report sent on a daily basis to all technologists acquiring PACS images to be used as a cross check that all studies are archived prior to being removed from the acquisition systems. Daily quality control is preformed to assure that studies can be moved from each acquisition and contrast adjustment. The results of selected quality control reports will be presented. The intranet documentation server will be described with the automatic pager system. Monitor quality control reports will be described and the cost of quality control will be quantified. As PACS is accepted as a clinical tool, the same standards of quality control must be established

Quality assurance and statistical control

DEFF Research Database (Denmark)

Heydorn, K.

1991-01-01

In scientific research laboratories it is rarely possible to use quality assurance schemes, developed for large-scale analysis. Instead methods have been developed to control the quality of modest numbers of analytical results by relying on statistical control: Analysis of precision serves...... to detect analytical errors by comparing the a priori precision of the analytical results with the actual variability observed among replicates or duplicates. The method relies on the chi-square distribution to detect excess variability and is quite sensitive even for 5-10 results. Interference control...... serves to detect analytical bias by comparing results obtained by two different analytical methods, each relying on a different detection principle and therefore exhibiting different influence from matrix elements; only 5-10 sets of results are required to establish whether a regression line passes...

Quality by control: Towards model predictive control of mammalian cell culture bioprocesses.

Science.gov (United States)

Sommeregger, Wolfgang; Sissolak, Bernhard; Kandra, Kulwant; von Stosch, Moritz; Mayer, Martin; Striedner, Gerald

2017-07-01

The industrial production of complex biopharmaceuticals using recombinant mammalian cell lines is still mainly built on a quality by testing approach, which is represented by fixed process conditions and extensive testing of the end-product. In 2004 the FDA launched the process analytical technology initiative, aiming to guide the industry towards advanced process monitoring and better understanding of how critical process parameters affect the critical quality attributes. Implementation of process analytical technology into the bio-production process enables moving from the quality by testing to a more flexible quality by design approach. The application of advanced sensor systems in combination with mathematical modelling techniques offers enhanced process understanding, allows on-line prediction of critical quality attributes and subsequently real-time product quality control. In this review opportunities and unsolved issues on the road to a successful quality by design and dynamic control implementation are discussed. A major focus is directed on the preconditions for the application of model predictive control for mammalian cell culture bioprocesses. Design of experiments providing information about the process dynamics upon parameter change, dynamic process models, on-line process state predictions and powerful software environments seem to be a prerequisite for quality by control realization. © 2017 The Authors. Biotechnology Journal published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Proposed quality control protocol of a dual energy bone densitometer from Spanish protocol for quality control of radiology

International Nuclear Information System (INIS)

Saez, F.; Benito, M. A.; Collado, P.; Saez, M.

2011-01-01

In this paper we propose additional testing to complete the tests by the Spanish Protocol for Quality Control of Diagnostic Radiology, taking into account the particular characteristics of these units, and including these tests in the estimation of patient dose dose assessment area. There is also the possibility to independently verify the quality control tests that are done automatically.

Analytical approaches to quality assurance and quality control in rangeland monitoring data

Science.gov (United States)

Producing quality data to support land management decisions is the goal of every rangeland monitoring program. However, the results of quality assurance (QA) and quality control (QC) efforts to improve data quality are rarely reported. The purpose of QA and QC is to prevent and describe non-sampling...

Demographic and quality control parameters of Anastrepha Fraterculus (Diptera: Tephritidae) maintained under artificial rearing

International Nuclear Information System (INIS)

Vera, T.; Abraham, S.; Oviedo, A.; Willink, E.

2007-01-01

The integration of the sterile insect technique (SIT) in the management of the South American fruit fly Anastrepha fraterculus (Wiedemann) (Diptera: Tephritidae) is a promising alternative to chemically-based control in those areas where it is sympatric with Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) or other tephritid species for which the SIT is being used. Implementation of the SIT requires the development of a cost effective mass-rearing protocol. In this work, we present demographic and quality control parameters for the A. fraterculus strain reared at the Estacion Experimental Agroindustrial Obispo Colombres, Tucuman, Argentina. Considering the rearing cage as the reproduction unit, we observed that fecundity is optimal during the first 3 weeks after the onset of oviposition. Fertility was constant during this period. During 2003 and 2004, some improvements were made to the existing rearing protocol, which resulted in increased larval viability, pupal weight, and adult emergence. Current weekly egg production is 1 million per week. These eggs are used to maintain the colony and to assess quality parameters. Finally, research needs leading to improved yields and fly quality are discussed. (author) [es

AUTOMATION OF THE SYSTEM OF INTERNAL LABORATORY QUALITY CONTROL

Directory of Open Access Journals (Sweden)

V. Z. Stetsyuk

2015-05-01

Full Text Available Quality control system base d on the principles of standardi zation of all phases of laboratory testing and analysis of internal laboratory quality control and external quality assessment. For the detection accuracy of the results of laboratory tests, carried out internally between the laboratory and laboratory quality control. Under internal laboratory quality control we understand measurement results of each analysis in each anal ytical series rendered directly in the lab every day. The purpose of internal laboratory control - identifying and eliminating unacceptable deviations from standard perfor mance test in the laboratory, i.e. identifying and eliminating harmful analytical errors. The solutions to these problems by implementing automated systems - software that allows you to optimize analytical laboratory research stage of the procedure by automatically creating process control charts was shown.

75 FR 29976 - Certain Cut-to-Length Carbon-Quality Steel Plate Products From Italy: Extension of the Final...

Science.gov (United States)

2010-05-28

... DEPARTMENT OF COMMERCE International Trade Administration [A-475-826] Certain Cut-to-Length Carbon-Quality Steel Plate Products From Italy: Extension of the Final Results of Antidumping Duty Administrative...-quality steel plate products from Italy. See Certain Cut-to-Length Carbon-Quality Steel Plate Products...

14 CFR 21.147 - Changes in quality control system.

Science.gov (United States)

2010-01-01

... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Changes in quality control system. 21.147 Section 21.147 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION... quality control system. After the issue of a production certificate, each change to the quality control...

21 CFR 111.117 - What quality control operations are required for equipment, instruments, and controls?

Science.gov (United States)

2010-04-01

... 21 Food and Drugs 2 2010-04-01 2010-04-01 false What quality control operations are required for equipment, instruments, and controls? 111.117 Section 111.117 Food and Drugs FOOD AND DRUG ADMINISTRATION... and Process Control System: Requirements for Quality Control § 111.117 What quality control operations...

Metrology and quality control handbook

International Nuclear Information System (INIS)

Hofmann, D.

1983-01-01

This book tries to present the fundamentals of metrology and quality control in brief surveys. Compromises had to be made in order to reduce the material available to a sensible volume for the sake of clarity. This becomes evident by the following two restrictions which had to made: First, in dealing with the theoretical principles of metrology and quality control, mere reference had to be made in many cases to the great variety of special literature without discussing it to explain further details. Second, in dealing with the application of metrology and quality control techniques in practice, only the basic qantities of the International System of Units (SI) could be taken into account as a rule. Some readers will note that many special measuring methods and equipment known to them are not included in this book. I do hope, however, that this short-coming will show to have a positive effect, too. This book will show the reader how to find the basic quantities and units from the derived quantities and units, and the steps that are necessary to solve any kind of measuring task. (orig./RW) [de

Impact of initial surface parameters on the final quality of laser micro-polished surfaces

Science.gov (United States)

Chow, Michael; Bordatchev, Evgueni V.; Knopf, George K.

2012-03-01

Laser micro-polishing (LμP) is a new laser-based microfabrication technology for improving surface quality during a finishing operation and for producing parts and surfaces with near-optical surface quality. The LμP process uses low power laser energy to melt a thin layer of material on the previously machined surface. The polishing effect is achieved as the molten material in the laser-material interaction zone flows from the elevated regions to the local minimum due to surface tension. This flow of molten material then forms a thin ultra-smooth layer on the top surface. The LμP is a complex thermo-dynamic process where the melting, flow and redistribution of molten material is significantly influenced by a variety of process parameters related to the laser, the travel motions and the material. The goal of this study is to analyze the impact of initial surface parameters on the final surface quality. Ball-end micromilling was used for preparing initial surface of samples from H13 tool steel that were polished using a Q-switched Nd:YAG laser. The height and width of micromilled scallops (waviness) were identified as dominant parameter affecting the quality of the LμPed surface. By adjusting process parameters, the Ra value of a surface, having a waviness period of 33 μm and a peak-to-valley value of 5.9 μm, was reduced from 499 nm to 301 nm, improving the final surface quality by 39.7%.

MRI quality control: six imagers studied using eleven unified image quality parameters

International Nuclear Information System (INIS)

Ihalainen, T.; Sipilae, O.; Savolainen, S.

2004-01-01

Quality control of the magnetic resonance imagers of different vendors in the clinical environment is non-harmonised, and comparing the performance is difficult. The purpose of this study was to develop and apply a harmonised long-term quality control protocol for the six imagers in our organisation in order to assure that they fulfil the same basic image quality requirements. The same Eurospin phantom set and identical imaging parameters were used with each imager. Values of 11 comparable parameters describing the image quality were measured. Automatic image analysis software was developed to objectively analyse the images. The results proved that the imagers were operating at a performance level adequate for clinical imaging. Some deficiencies were detected in image uniformity and geometry. The automated analysis of the Eurospin phantom images was successful. The measurements were successfully repeated after 2 weeks on one imager and after half a year on all imagers. As an objective way of examining the image quality, this kind of comparable and objective quality control of different imagers is considered as an essential step towards harmonisation of the clinical MRI studies through a large hospital organisation. (orig.)

European quality assurance and quality control for cut-off walls and caps

International Nuclear Information System (INIS)

Jefferis, S.A.

1997-01-01

Cut-off walls and caps both may be seriously compromised by small areas of substandard materials or work. Quality assurance/quality control is therefore of crucial importance and the paper sets out the issues that need to be addressed when designing a quality plan for a containment. Consideration is given to the purpose of the containment, the parameters to be controlled, specifications and standards and tests on raw and manufactured materials and on the in-situ containment. It is not the purpose of the paper to give detailed test procedures but rather to identify the questions that must be answered to develop a quality plan

Computer-supported quality control in X-ray diagnosis

International Nuclear Information System (INIS)

Maier, W.; Klotz, E.

1989-01-01

Quality control of X-ray facilities in radiological departments of large hospitals is possible only if the instrumentation used for measurements is interfaced to a computer. The central computer helps to organize the measurements as well as analyse and record the results. It can also be connected to a densitometer and camera for evaluating radiographs of test devices. Other quality control tests are supported by a mobile station with equipment for non-invasive dosimetry measurements. Experience with a computer-supported system in quality control of film and film processing is described and the evaluation methods of ANSI and the German industrial standard DIN are compared. The disadvantage of these methods is the exclusion of film quality parameters, which can make processing control almost worthless. (author)

Quality control of radiation therapy in clinical trials

International Nuclear Information System (INIS)

Kramer, S.; Lustig, R.; Grundy, G.

1983-01-01

The RTOG is a group of participating institutions which has a major interest in furthering clinical radiation oncology. They have formulated protocols for clinical investigation in which radiation therapy is the major modality of treatment. In addition, other modalities, such as chemotherapy, radiation sensitizers, and hyperthermia, are used in combined approach to cancer. Quality control in all aspects of patient management is necessary to insure quality data. These areas include evaluation of pathology, physics, and dosimetry, and clinical patient data. Quality control is both time consuming and expensive. However, by dividing these tasks into various levels and time frames, by using computerized data-control mechanisms, and by employing appropriate levels of ancillary personnel expertise, quality control can improve compliance and decrease the cost of investigational trials

Secondary Control for Voltage Quality Enhancement in Microgrids

DEFF Research Database (Denmark)

Savaghebi, Mehdi; Jalilian, Alireza; Vasquez, Juan Carlos

2012-01-01

In this paper, a hierarchical control scheme is proposed for enhancement of sensitive load bus (SLB) voltage quality in microgrids. The control structure consists of primary and secondary levels. The primary control level comprises distributed generators (DGs) local controllers. Each of these con......In this paper, a hierarchical control scheme is proposed for enhancement of sensitive load bus (SLB) voltage quality in microgrids. The control structure consists of primary and secondary levels. The primary control level comprises distributed generators (DGs) local controllers. Each...

Justification and quality control in radiodiagnostics

International Nuclear Information System (INIS)

Dalen, A. van

1989-01-01

The role of the radiodiagnostician in justification of x-ray examination is discussed. Under the final responsibility of the radio-diagnostician the more common examinations are performed by laboratory assistants. A justification judgement before by the radio-diagnostician does not take place. In case of complicated examinations often previous consultation between radio-diagnostician and clinician is necessary. The fast development of new techniques like CT, echography and MRI has as result that the modern radio-diagnostician develops more and more into a imaging-specialist. In the consultation with the clinician he advises about the optimal diagnostics for a certain patient, taking optimally into account the risks of x-radiation. The justifying role of the radio-diagnostician depends further upon the relation with the requiring physician. In general the inter-collegial consultation is assumed to be sufficient within the hospitals, however the feedback to general practitioners seems to be improvable in some cases. With regard to quality assurance it is remarked that the quality of the examination may not be endangered by a too strong emphasis upon radiation reduction. Aspects like education level, protocol learning, dose limits, degressive tariffs, information-transfer, radiation passport, analysis between 'blue' ton, centralization of x-ray examination and quality of apparatus, are discussed. From the Government primarily a constraint setting policy is expected, in which rule-giving with respect to quality of education and apparatus is highly important. A stimulation of inter-collegial consulting may be expected, in particular in financial sense. A permission policy has to be managed, which ensures centralization of apparatus and centrally performance of x-ray examination as much as possible. Finally warning is given for the effects of excessive fear for radiation which causes refraining of medical necessary examination. The various risk have to be weighed up

Comparative mass spectrometry & nuclear magnetic resonance metabolomic approaches for nutraceuticals quality control analysis: a brief review.

Science.gov (United States)

Farag, Mohamed A

2014-01-01

The number of botanical dietary supplements in the market has recently increased primarily due to increased health awareness. Standardization and quality control of the constituents of these plant extracts is an important topic, particularly when such ingredients are used long term as dietary supplements, or in cases where higher doses are marketed as drugs. The development of fast, comprehensive, and effective untargeted analytical methods for plant extracts is of high interest. Nuclear magnetic resonance spectroscopy and mass spectrometry are the most informative tools, each of which enables high-throughput and global analysis of hundreds of metabolites in a single step. Although only one of the two techniques is utilized in the majority of plant metabolomics applications, there is a growing interest in combining the data from both platforms to effectively unravel the complexity of plant samples. The application of combined MS and NMR in the quality control of nutraceuticals forms the major part of this review. Finally I will look at the future developments and perspectives of these two technologies for the quality control of herbal materials.

Shipping/Receiving and Quality Control

Data.gov (United States)

Federal Laboratory Consortium — Shipping receiving, quality control, large and precise inspection and CMM machines. Coordinate Measuring Machines, including "scanning" probes, optical comparators,...

Quality control of the activity meter

International Nuclear Information System (INIS)

Rodrigues, Marlon da Silva Brandão; Sá, Lídia Vasconcelos de

2017-01-01

Objective: To carry out a comparative analysis of national and international standards regarding the quality control of the activity meter used in Nuclear Medicine Services in Brazil. Material and methods: Quality control protocols from the International Atomic Energy Agency (IAEA), American Association of Physicists in Medicine (AAPM) and International Electrotechnical Commission (IEC) were pointed out and compared with requirements from both regulatory Brazilian agencies, National Surveillance Agency (ANVISA) and National Nuclear Energy Commission (CNEN). Results: The daily routine tests recommended by the regulatory agencies do not have significant differences; in contrast the tests with higher periodicities like (accuracy, linearity and precision) have differences discrepant. Conclusion: In view of the comparative analysis carried out, it is suggested that the national recommendations for the quality control tests of the activity meter should be checked and evaluated, with emphasis on the semiannual and annual periodicity tests. (author)

Quality assurance programme and quality control

International Nuclear Information System (INIS)

Alvarez de Buergo, L.

1979-01-01

The paper analyses the requirements for the quality assurance and control in nuclear power plant projects which are needed to achieve safe, reliable and economic plants. The author describes the structure for the establishment of a nuclear programme at the national level and the participation of the different bodies involved in a nuclear power plant project. The paper ends with the study of a specific case in Spain. (NEA) [fr

Quality control of imaging devices

International Nuclear Information System (INIS)

Soni, P.S.

1992-01-01

Quality assurance in nuclear medicine refers collectively to all aspects of a nuclear medicine service. It would include patient scheduling, radiopharmaceutical preparation and dispensing, radiation protection of patients, staff and general public, preventive maintenance and the care of instruments, methodology, data interpretation and records keeping, and many other small things which contribute directly or indirectly to the overall quality of a nuclear medicine service in a hospital. Quality Control, on the other hand, refers to a signal component of the system and is usually applied in relation to a specific instrument and its performance

7 CFR 58.523 - Laboratory and quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Laboratory and quality control tests. 58.523 Section... Service 1 Operations and Operating Procedures § 58.523 Laboratory and quality control tests. (a) Quality control tests shall be made on samples as often as necessary to determine the shelf-life and stability of...

21 CFR 640.56 - Quality control test for potency.

Science.gov (United States)

2010-04-01

... quality control test for potency may be performed by a clinical laboratory which meets the standards of... 21 Food and Drugs 7 2010-04-01 2010-04-01 false Quality control test for potency. 640.56 Section...) BIOLOGICS ADDITIONAL STANDARDS FOR HUMAN BLOOD AND BLOOD PRODUCTS Cryoprecipitate § 640.56 Quality control...

Web quality control for lectures: Supercourse and Amazon.com.

Science.gov (United States)

Linkov, Faina; LaPorte, Ronald; Lovalekar, Mita; Dodani, Sunita

2005-12-01

Peer review has been at the corner stone of quality control of the biomedical journals in the past 300 years. With the emergency of the Internet, new models of quality control and peer review are emerging. However, such models are poorly investigated. We would argue that the popular system of quality control used in Amazon.com offers a way to ensure continuous quality improvement in the area of research communications on the Internet. Such system is providing an interesting alternative to the traditional peer review approaches used in the biomedical journals and challenges the traditional paradigms of scientific publishing. This idea is being explored in the context of Supercourse, a library of 2,350 prevention lectures, shared for free by faculty members from over 150 countries. Supercourse is successfully utilizing quality control approaches that are similar to Amazon.com model. Clearly, the existing approaches and emerging alternatives for quality control in scientific communications needs to be assessed scientifically. Rapid explosion of internet technologies could be leveraged to produce better, more cost effective systems for quality control in the biomedical publications and across all sciences.

40 CFR 81.111 - Georgetown Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.111 Georgetown Intrastate Air Quality Control Region. The Georgetown Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Georgetown Intrastate Air Quality...

40 CFR 81.107 - Greenwood Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.107 Greenwood Intrastate Air Quality Control Region. The Greenwood Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Greenwood Intrastate Air Quality...

40 CFR 81.108 - Columbia Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.108 Columbia Intrastate Air Quality Control Region. The Columbia Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Columbia Intrastate Air Quality...

40 CFR 81.109 - Florence Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.109 Florence Intrastate Air Quality Control Region. The Florence Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Florence Intrastate Air Quality...

40 CFR 81.35 - Louisville Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.35 Louisville Interstate Air Quality Control Region. The Louisville Interstate Air Quality Control Region (Kentucky-Indiana) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Louisville Interstate Air Quality...

78 FR 29113 - Certain Cut-to-Length Carbon-Quality Steel Plate Products From the Republic of Korea: Final...

Science.gov (United States)

2013-05-17

...-Quality Steel Plate Products From the Republic of Korea: Final Results of Antidumping Duty Administrative... administrative review of the antidumping duty order on certain cut-to-length carbon-quality steel plate products... duty order on certain cut-to-length carbon-quality steel plate products from the Republic of Korea...

75 FR 64254 - Certain Hot-Rolled Flat-Rolled Carbon Quality Steel Products From Brazil; Final Results of...

Science.gov (United States)

2010-10-19

...-Rolled Carbon Quality Steel Products From Brazil; Final Results of Antidumping Duty Administrative Review... for the Final Results, 75 FR 19369 (April 14, 2010) (Preliminary Results). This review covers sales of... Products from Brazil,'' dated June 22, 2010 (USIMINAS Sales Verification Report). Following the release of...

[Pharmaceutical product quality control and good manufacturing practices].

Science.gov (United States)

Hiyama, Yukio

2010-01-01

This report describes the roles of Good Manufacturing Practices (GMP) in pharmaceutical product quality control. There are three keys to pharmaceutical product quality control. They are specifications, thorough product characterization during development, and adherence to GMP as the ICH Q6A guideline on specifications provides the most important principles in its background section. Impacts of the revised Pharmaceutical Affairs Law (rPAL) which became effective in 2005 on product quality control are discussed. Progress of ICH discussion for Pharmaceutical Development (Q8), Quality Risk Management (Q9) and Pharmaceutical Quality System (Q10) are reviewed. In order to reconstruct GMP guidelines and GMP inspection system in the regulatory agencies under the new paradigm by rPAL and the ICH, a series of Health Science studies were conducted. For GMP guidelines, product GMP guideline, technology transfer guideline, laboratory control guideline and change control system guideline were written. For the GMP inspection system, inspection check list, inspection memo and inspection scenario were proposed also by the Health Science study groups. Because pharmaceutical products and their raw materials are manufactured and distributed internationally, collaborations with other national authorities are highly desired. In order to enhance the international collaborations, consistent establishment of GMP inspection quality system throughout Japan will be essential.

Family Control and Earnings Quality

Directory of Open Access Journals (Sweden)

Carolina Bona Sánchez

2007-06-01

Full Text Available El trabajo analiza la relación entre el control familiar y la calidad de la información contable en un contexto en el que el tradicional conflicto de agencia entre directivos y accionistas se desplaza a la divergencia de intereses entre accionistas controladores y minoritarios. Los resultados alcanzados muestran que, en comparación con las no familiares, las empresas de naturaleza familiar divulgan unos resultados de mayor calidad, tanto en términos de menores ajustes por devengo discrecionales como de mayor capacidad de los componentes actuales del resultado para predecir los cash flows futuros. Además, el aumento en los derechos de voto en manos de la familia controladora incrementa la calidad de los resultados contables. La evidencia obtenida se muestra consistente con la presencia de un efecto reputación/vinculación a largo plazo asociado a la empresa familiar. Adicionalmente, el trabajo refleja que a medida que disminuye la divergencia entre los derechos de voto y de cash flow en manos de la familia controladora, aumenta la calidad de la información contable.PALABRAS CLAVE: derechos de voto, divergencia, empresa familiar, calidad delresultado, reputación, beneficios privados.This work examines the relationship between family control and earnings quality in a context where the salient agency problem shifts away from the classical divergence between managers and shareholders to conflicts between the controlling owner and minority shareholders. The results reveal that, compared to non-family firms, family firms reveal higher earnings quality in terms of both lower discretionary accruals and greater predictability of future cash flows. They also show a positive relationship between the level of voting rights held by the controlling family and earnings quality. The evidence is consistent with the presence of a reputation/long-term involvement effect associated with the family firm. Moreover, the work reflects that, as the divergence

40 CFR 81.42 - Chattanooga Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.42 Chattanooga Interstate Air Quality Control Region. The Chattanooga Interstate Air Quality Control Region (Georgia-Tennessee) has been revised to consist of the territorial area... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Chattanooga Interstate Air Quality...

Quality control activities in the environmental radiology laboratory

International Nuclear Information System (INIS)

Llaurado, M.; Quesada, D.; Rauret, G.; Tent, J.; Zapata, D.

2006-01-01

During the last twenty years many analytical laboratories have implemented quality assurance systems. A quality system implementation requires documentation of all activities (technical and management), evaluation of these activities and its continual improvement. Implementation and adequate management of all the elements a quality system includes are not enough to guarantee quality of the analytical results generated at a time. That is the aim of a group of specific activities labelled as quality control activities. The Laboratori de Radiologia Ambiental (Environmental Radiology Laboratory; LRA) at the University of Barcelona was created in 1984 to carry out part of the quality control assays of the Environmental Radiology Monitoring Programs around some of the Spanish nuclear power plants, which are developed by the Servei Catala d'Activitats Energetiques (SCAR) and the Consejo de Seguridad Nuclear (CSN), organisations responsible for nuclear security and radiological protection. In these kind of laboratories, given the importance of the results they give, quality control activities become an essential aspect. In order to guarantee the quality of its analytical results, the LRA Direction decided to adopt the international standard UNE-EN ISO/IEC 17025 for its internal quality system and to accreditate some of the assays it carries out. In such as system, it is established, the laboratory shall monitor the validity of tests undertaken and data shall be recorded in such a way that trends are detectable. The present work shows the activities carried out in this way by the LRA, which are: Equipment control activities which in the special case of radiochemical techniques include measurement of backgrounds and blanks as well as periodical control of efficiency and resolution. Activities to assure the specifications settled by method validation, which are testing of reference materials and periodical analysis of control samples. Evaluation of the laboratory work quality

Quality control and analysis of radiotracer compounds

International Nuclear Information System (INIS)

Sheppard, G.; Thomson, R.

1977-01-01

Special emphasis was on the problems and errors possible in quality control and analysis. The principles underlying quality control were outlined, and analytical techniques applicable to radiotracers were described. Chapter concluded with a selection of examples showing the effects of impurities on the use of radiotracers. The subject of quality control and analysis was treated from the viewpoint of the user and those research workers who need to synthesize and analyze their own radiochemicals. The quality characteristics for radiotracers are of two kinds, valuable or attributive. These were discussed in the chapter. For counting low radioactive concentration, scintillation techniques are in general use, whereas ionization techniques are now used mainly for the measurement of high radioactive concentrations or large quantities of radioactivity, for scanning chromatograms, and a number of very specific purposes. Determination of radionuclidic purity was discussed. Use of radiotracers in pharmaceuticals were presented. 4 figures, 6 tables

Frontiers in statistical quality control

CERN Document Server

Wilrich, Peter-Theodor

2001-01-01

The book is a collection of papers presented at the 5th International Workshop on Intelligent Statistical Quality Control in Würzburg, Germany. Contributions deal with methodology and successful industrial applications. They can be grouped in four catagories: Sampling Inspection, Statistical Process Control, Data Analysis and Process Capability Studies and Experimental Design.

Quality Control Program for radiodiagnostic equipment on the Department of Antioquia, Colombia

International Nuclear Information System (INIS)

Beltran, Camilo; Viloria, Carolina; Puerta, Anselmo; Morales, Javier; Martinez, Piedad

2008-01-01

The Health Sectional Direction of Antioquia DSSA and the National University of Colombia campus Medellin have been formalizing inter-administrative agreements to realize Quality Control Studies on the institutions of medical radiodiagnostics of the department. In the first phase of the project on 2006, quality control studies were completed on 40 conventional and 31 mammography equipment, in the second phase by the end of 2006, 21 fluoroscopy, interventionism and C arms equipment were also studied; the third phase, finished by the end of 2007, counted with 50 conventional equipment. The tests proposed on the ARCAL XLIX IAEA protocol, tests on the installations, on the generator, on the image systems and the patient dosimetry were performed. From the evaluations on the installations, reports with relevant recommendations to be considerate and implemented to perform a better use of own resources on each institution were elaborated. On this paper, current results, impact on the participating institutions and the benefits from the applications that these kinds of practices bring to the institutions are presented. Finally, the necessity to advance towards clear politics in order to impulse the implementation of quality assurance programs in radiodiagnostic institutions, looking to improve the quality of diagnostic images with patient benefits, higher trust on technical conditions of equipment for a better and adequate diagnose, as well as to advance on processes seeking the optimization of radiological protection on the patient and the personnel occupationally exposed, is presented. (author)

Conjunctively optimizing flash flood control and water quality in urban water reservoirs by model predictive control and dynamic emulation

Science.gov (United States)

Galelli, Stefano; Goedbloed, Albert; Schmitter, Petra; Castelletti, Andrea

2014-05-01

Urban water reservoirs are a viable adaptation option to account for increasing drinking water demand of urbanized areas as they allow storage and re-use of water that is normally lost. In addition, the direct availability of freshwater reduces pumping costs and diversifies the portfolios of drinking water supply. Yet, these benefits have an associated twofold cost. Firstly, the presence of large, impervious areas increases the hydraulic efficiency of urban catchments, with short time of concentration, increased runoff rates, losses of infiltration and baseflow, and higher risk of flash floods. Secondly, the high concentration of nutrients and sediments characterizing urban discharges is likely to cause water quality problems. In this study we propose a new control scheme combining Model Predictive Control (MPC), hydro-meteorological forecasts and dynamic model emulation to design real-time operating policies that conjunctively optimize water quantity and quality targets. The main advantage of this scheme stands in its capability of exploiting real-time hydro-meteorological forecasts, which are crucial in such fast-varying systems. In addition, the reduced computational requests of the MPC scheme allows coupling it with dynamic emulators of water quality processes. The approach is demonstrated on Marina Reservoir, a multi-purpose reservoir located in the heart of Singapore and characterized by a large, highly urbanized catchment with a short (i.e. approximately one hour) time of concentration. Results show that the MPC scheme, coupled with a water quality emulator, provides a good compromise between different operating objectives, namely flood risk reduction, drinking water supply and salinity control. Finally, the scheme is used to assess the effect of source control measures (e.g. green roofs) aimed at restoring the natural hydrological regime of Marina Reservoir catchment.

Quality control procedures in positron tomography

International Nuclear Information System (INIS)

Spinks, T.; Jones, T.; Heather, J.; Gilardi, M.

1989-01-01

The derivation of physiological parameters in positron tomography relies on accurate calibration of the tomograph. Normally, the calibration relates image pixel count density to the count rate from an external blood counter per unit activity concentration in each device. The quality control of the latter is simple and relies on detector stability assessed by measurement of a standard source of similar geometry to a blood sample. The quality control of the tomographic data depends on (i) detector stability, (ii) uniformity of calibration and normalisation sources and (iii) reproducibility of the attenuation correction procedure. A quality control procedure has been developed for an 8 detector ring (15 transaxial plane) tomograph in which detector response is assessed by acquiring data from retractable transmission ring sources. These are scanned daily and a print out of detector efficiencies is produced as well as changes from a given data. This provides the raw data from which decisions on recalibration or renormalisation are made. (orig.)

21 CFR 862.1660 - Quality control material (assayed and unassayed).

Science.gov (United States)

2010-04-01

... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Quality control material (assayed and unassayed... Test Systems § 862.1660 Quality control material (assayed and unassayed). (a) Identification. A quality... that may arise from reagent or analytical instrument variation. A quality control material (assayed and...

Improving Forecast Skill by Assimilation of Quality Controlled AIRS Version 5 Temperature Soundings

Science.gov (United States)

Susskind, Joel; Reale, Oreste

2009-01-01

The AIRS Science Team Version 5 retrieval algorithm has been finalized and is now operational at the Goddard DAAC in the processing (and reprocessing) of all AIRS data. The AIRS Science Team Version 5 retrieval algorithm contains two significant improvements over Version 4: 1) Improved physics allows for use of AIRS observations in the entire 4.3 micron CO2 absorption band in the retrieval of temperature profile T(p) during both day and night. Tropospheric sounding 15 micron CO2 observations are now used primarily in the generation of cloud cleared radiances R(sub i). This approach allows for the generation of accurate values of R(sub i) and T(p) under most cloud conditions. 2) Another very significant improvement in Version 5 is the ability to generate accurate case-by-case, level-by-level error estimates for the atmospheric temperature profile, as well as for channel-by-channel error estimates for R(sub i). These error estimates are used for Quality Control of the retrieved products. We have conducted forecast impact experiments assimilating AIRS temperature profiles with different levels of Quality Control using the NASA GEOS-5 data assimilation system. Assimilation of Quality Controlled T(p) resulted in significantly improved forecast skill compared to that obtained from analyses obtained when all data used operationally by NCEP, except for AIRS data, is assimilated. We also conducted an experiment assimilating AIRS radiances uncontaminated by clouds, as done operationally by ECMWF and NCEP. Forecast resulting from assimilated AIRS radiances were of poorer quality than those obtained assimilating AIRS temperatures.

Optimization of production and quality control of therapeutic radionuclides and radiopharmaceuticals. Final report of a co-ordinated research project 1994-1998

International Nuclear Information System (INIS)

1999-09-01

The 'renaissance' of the therapeutic applications of radiopharmaceuticals during the last few years was in part due to a greater availability of radionuclides with appropriate nuclear decay properties, as well as to the development of carrier molecules with improved characteristics. Although radionuclides such as 32 P, 89 Sr and 131 I, were used from the early days of nuclear medicine in the late 1930s and early 1940s, the inclusion of other particle emitting radionuclides into the nuclear medicine armamentarium was rather late. Only in the early 1980s did the specialized scientific literature start to show the potential for using other beta emitting nuclear reactor produced radionuclides such as 153 Sm, 166 Ho, 165 Dy and 186-188 Re. Bone seeking agents radiolabelled with the above mentioned beta emitting radionuclides demonstrated clear clinical potential in relieving intense bone pain resulting from metastases of the breast, prostate and lung of cancer patients. Therefore, upon the recommendation of a consultants meeting held in Vienna in 1993, the Co-ordinated Research Project (CRP) on Optimization of the Production and quality control of Radiotherapeutic Radionuclides and Radiopharmaceuticals was established in 1994. The CRP aimed at developing and improving existing laboratory protocols for the production of therapeutic radionuclides using existing nuclear research reactors including the corresponding radiolabelling, quality control procedures; and validation in experimental animals. With the participation of ten scientists from IAEA Member States, several laboratory procedures for preparation and quality control were developed, tested and assessed as potential therapeutic radiopharmaceuticals for bone pain palliation. In particular, the CRP optimised the reactor production of 153 Sm and the preparation of the radiopharmaceutical 153 Sm-EDTMP (ethylene diamine tetramethylene phosphonate), as well as radiolabelling techniques and quality control methods for

Quality control in the radioactive waste management

International Nuclear Information System (INIS)

Rzyski, B.M.

1989-01-01

Radioactive waste management as in industrial activities must mantain in all steps a quality control programme. This control extended from materials acquisition, for waste treatment, to the package deposition is one of the most important activities because it aims to observe the waste acceptance criteria in repositories and allows to guarantee the security of the nuclear facilities. In this work basic knowledges about quality control in waste management and some examples of adopted procedures in other countries are given. (author) [pt

[Post-marketing reevaluation for potential quality risk and quality control in clinical application of traditional Chinese medicines].

Science.gov (United States)

Li, Hong-jiao; He, Li-yun; Liu, Bao-yan

2015-06-01

The effective quality control in clinical practices is an effective guarantee for the authenticity and scientificity of the findings. The post-marketing reevaluation for traditional Chinese medicines (TCM) focuses on the efficacy, adverse reaction, combined medication and effective dose of drugs in the market by expanded clinical trials, and requires a larger sample size and a wider range of patients. Therefore, this increases the difficulty of quality control in clinical practices. With the experience in quality control in clinical practices for the post-marketing reevaluation for Kangbingdu oral for cold, researchers in this study reviewed the study purpose, project, scheme design and clinical practice process from an overall point of view, analyzed the study characteristics of the post-marketing reevaluation for TCMs and the quality control risks, designed the quality control contents with quality impacting factors, defined key review contents and summarized the precautions in clinical practices, with the aim to improve the efficiency of quality control of clinical practices. This study can provide reference to clinical units and quality control-related personnel in the post-marketing reevaluation for TCMs.

The results of a quality-control programme in mammography

International Nuclear Information System (INIS)

Ramsdale, M.L.; Hiles, P.A.

1989-01-01

A quality-control programme at a breast screening clinic is described. Daily checks include film sensitometry for X-ray processor control and radiography of a lucite phantom to monitor the consistency of the X-ray machine automatic exposure control. Weekly checks include additional measurements on the performance of the automatic exposure control for different breast thickness and an overall assessment of image quality using a prototype mammography test phantom. The test phantom measures low-contrast sensitivity, high-control resolution and small-detail visibility. The results of the quality-control programme are presented with particular attention paid to tolerances and limiting values. (author)

3D printing X-Ray Quality Control Phantoms. A Low Contrast Paradigm

Science.gov (United States)

Kapetanakis, I.; Fountos, G.; Michail, C.; Valais, I.; Kalyvas, N.

2017-11-01

Current 3D printing technology products may be usable in various biomedical applications. Such an application is the creation of X-ray quality control phantoms. In this work a self-assembled 3D printer (geeetech i3) was used for the design of a simple low contrast phantom. The printing material was Polylactic Acid (PLA) (100% printing density). Low contrast scheme was achieved by creating air-holes with different diameters and thicknesses, ranging from 1mm to 9mm. The phantom was irradiated at a Philips Diagnost 93 fluoroscopic installation at 40kV-70kV with the semi-automatic mode. The images were recorded with an Agfa cr30-x CR system and assessed with ImageJ software. The best contrast value observed was approximately 33%. In low contrast detectability check it was found that the 1mm diameter hole was always visible, for thickness larger or equal to 4mm. A reason for not being able to distinguish 1mm in smaller thicknesses might be the presence of printing patterns on the final image, which increased the structure noise. In conclusion the construction of a contrast resolution phantom with a 3D printer is feasible. The quality of the final product depends upon the printer accuracy and the material characteristics.

40 CFR 81.104 - Central Pennsylvania Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.104 Section 81.104 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.104 Central Pennsylvania Intrastate Air Quality Control Region. The Central Pennsylvania Intrastate Air Quality Control Region consists of the territorial area encompassed by...

40 CFR 81.43 - Metropolitan Toledo Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.43 Section 81.43 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.43 Metropolitan Toledo Interstate Air Quality Control Region. The Metropolitan Toledo Interstate Air Quality Control Region (Ohio-Michigan) consists of the territorial area...

40 CFR 81.31 - Metropolitan Providence Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.31 Section 81.31 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.31 Metropolitan Providence Interstate Air Quality Control Region. The Metropolitan Providence Interstate Air Quality Control Region (Rhode Island-Massachusetts) consists of the...

40 CFR 81.90 - Androscoggin Valley Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.90 Section 81.90 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.90 Androscoggin Valley Interstate Air Quality Control Region. The Androscoggin Valley Interstate Air Quality Control Region (Maine-New Hampshire) consists of the territorial...

40 CFR 81.78 - Metropolitan Portland Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.78 Section 81.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.78 Metropolitan Portland Intrastate Air Quality Control Region. The Metropolitan Portland Intrastate Air Quality Control Region (Maine) consists of the territorial area...

40 CFR 81.30 - Southeastern Wisconsin Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.30 Section 81.30 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.30 Southeastern Wisconsin Intrastate Air Quality Control Region. The Metropolitan Milwaukee Intrastate Air Quality Control Region (Wisconsin) has been renamed the Southeastern...

40 CFR 81.16 - Metropolitan Denver Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.16 Section 81.16 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.16 Metropolitan Denver Intrastate Air Quality Control Region. The Metropolitan Denver Intrastate Air Quality Control Region (Colorado) consists of the territorial area...

40 CFR 81.47 - Central Oklahoma Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.47 Section 81.47 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.47 Central Oklahoma Intrastate Air Quality Control Region. The Metropolitan Oklahoma Intrastate Air Quality Control Region has been renamed the Central Oklahoma Intrastate...

40 CFR 81.29 - Metropolitan Indianapolis Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Air Quality Control Region. 81.29 Section 81.29 Protection of Environment ENVIRONMENTAL PROTECTION... Designation of Air Quality Control Regions § 81.29 Metropolitan Indianapolis Intrastate Air Quality Control Region. The Metropolitan Indianapolis Intrastate Air Quality Control Region consists of the territorial...

40 CFR 81.101 - Metropolitan Dubuque Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.101 Section 81.101 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.101 Metropolitan Dubuque Interstate Air Quality Control Region. The Metropolitan Dubuque Interstate Air Quality Control Region (Illinois-Iowa-Wisconsin) consists of the...

40 CFR 81.79 - Northeastern Oklahoma Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.79 Section 81.79 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.79 Northeastern Oklahoma Intrastate Air Quality Control Region. The Metropolitan Tulsa Intrastate Air Quality Control Region has been renamed the Northeastern Oklahoma Intrastate...

40 CFR 81.24 - Niagara Frontier Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.24 Section 81.24 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.24 Niagara Frontier Intrastate Air Quality Control Region. The Niagara Frontier Intrastate Air Quality Control Region (New York) consists of the territorial area...

40 CFR 81.106 - Greenville-Spartanburg Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.106 Section 81.106 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.106 Greenville-Spartanburg Intrastate Air Quality Control Region. The Greenville-Spartanburg Intrastate Air Quality Control Region (South Carolina) consists of the territorial...

40 CFR 81.44 - Metropolitan Memphis Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.44 Section 81.44 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.44 Metropolitan Memphis Interstate Air Quality Control Region. The Metropolitan Memphis Interstate Air Quality Control Region (Arkansas-Mississippi-Tennessee) consists of the...

40 CFR 81.19 - Metropolitan Boston Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.19 Section 81.19 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.19 Metropolitan Boston Intrastate Air Quality Control Region. The Metropolitan Boston Intrastate Air Quality Control Region (Massachusetts) consists of the territorial area...

40 CFR 81.28 - Metropolitan Baltimore Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.28 Section 81.28 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.28 Metropolitan Baltimore Intrastate Air Quality Control Region. The Metropolitan Baltimore Intrastate Air Quality Control Region (Maryland) consists of the territorial area...

40 CFR 81.119 - Western Tennessee Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.119 Section 81.119 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.119 Western Tennessee Intrastate Air Quality Control Region. The Western Tennessee Intrastate Air Quality Control Region consists of the territorial area encompassed by...

40 CFR 81.89 - Metropolitan Cheyenne Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.89 Section 81.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.89 Metropolitan Cheyenne Intrastate Air Quality Control Region. The Metropolitan Cheyenne Intrastate Air Quality Control Region (Wyoming) consists of the territorial area...

40 CFR 81.87 - Metropolitan Boise Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.87 Section 81.87 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.87 Metropolitan Boise Intrastate Air Quality Control Region. The Metropolitan Boise Intrastate Air Quality Control Region (Idaho) consists of the territorial area encompassed...

40 CFR 81.23 - Southwest Pennsylvania Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.23 Section 81.23 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.23 Southwest Pennsylvania Intrastate Air Quality Control Region. The Southwest Pennsylvania Intrastate Air Quality Control Region is redesignated to consist of the territorial...

40 CFR 81.75 - Metropolitan Charlotte Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.75 Section 81.75 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.75 Metropolitan Charlotte Interstate Air Quality Control Region. The Metropolitan Charlotte Interstate Air Quality Control Region (North Carolina-South Carolina) has been revised...

40 CFR 81.120 - Middle Tennessee Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.120 Section 81.120 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.120 Middle Tennessee Intrastate Air Quality Control Region. The Middle Tennessee Intrastate Air Quality Control Region consists of the territorial area encompassed by...

Modelling of air quality for Winter and Summer episodes in Switzerland. Final report

Energy Technology Data Exchange (ETDEWEB)

Andreani-Aksoyoglu, S.; Keller, J.; Barmpadimos, L.; Oderbolz, D.; Tinguely, M.; Prevot, A. [Paul Scherrer Institute (PSI), Laboratory of Atmospheric Chemistry, Villigen (Switzerland); Alfarra, R. [University of Manchester, Manchester (United Kingdom); Sandradewi, J. [Jisca Sandradewi, Hoexter (Germany)

2009-05-15

This final report issued by the General Energy Research Department and its Laboratory of Atmospheric Chemistry at the Paul Scherrer Institute (PSI) reports on the results obtained from the modelling of regional air quality for three episodes, January-February 2006, June 2006 and January 2007. The focus of the calculations is on particulate matter concentrations, as well as on ozone levels in summer. The model results were compared with the aerosol data collected by an Aerosol Mass Spectrometer (AMS), which was operated during all three episodes as well as with the air quality monitoring data from further monitoring programs. The air quality model used in this study is described and the results obtained for various types of locations - rural, city, high-altitude and motorway-near - are presented and discussed. The models used are described.

HPLC for quality control of polyimides

Science.gov (United States)

Young, P. R.; Sykes, G. F.

1979-01-01

High Pressure Liquid Chromatography (HPLC) as a quality control tool for polyimide resins and prepregs are presented. A data base to help establish accept/reject criteria for these materials was developed. This work is intended to supplement, not replace, standard quality control tests normally conducted on incoming resins and prepregs. To help achieve these objectives, the HPLC separation of LARC-160 polyimide precursor resin was characterized. Room temperature resin aging effects were studied. Graphite reinforced composites made from fresh and aged resin were fabricated and tested to determine if changes observed by HPLC were significant.

Design and implementation of strategies for the assurance of quality for sterility testing in the Quality Control Section of the Chilean Nuclear Energy Commission

International Nuclear Information System (INIS)

Olave Carreno, Evelyn Karina

2015-01-01

The Department of Production and Service of the Chilean Nuclear Energy Commission (CCHEN), is an organization dedicated to the production and quality control of radioisotopes and radiopharmaceuticals. To be considered pharmaceutical specialties, the department has implemented a quality assurance system to guarantee compliance with the required standards during manufacturing processes, quality control and distribution. Such products are administered, mostly by via parental; that is why it is extremely important that as an injectable solution is sterile non-pyrogenic. Therefore, the Head of Quality Control Section emphasized the importance of validating sterility testing for these products. In the first instance we proceeded to update the related documentation, as this is one of the essential pillars of a good system of quality assurance, then continuing with the verification of compliance with the physical conditions of the place where the infertility tests are performed (classification of areas from a microbiological point of view). During this process, the proper training of personnel involved in performing environmental testing and sterility testing was performed. Finally, we proceeded to validate the sterility test by the method of direct inoculation three radiopharmaceuticals; also implemented sterility testing by membrane filtration method described in the USP. It was possible to validate the methods of direct inoculation and membrane filtration based on the validation protocol guidelines generated and previously approved by the Chief; demonstrating that in both cases the detection of reference strains of inocula is achieved under 100 cfu (Staphylococcus aureus, Bacillus spizizenii, Pseudomonas aeruginosa, Clostridium sporogenes, Candida albicans, Aspergillus brasiliensis), without interference of two of the products tested and interference of a product by direct inoculation method which was resolved. Based on these results, the documented evidence that

Implementing self sustained quality control procedures in a clinical laboratory.

Science.gov (United States)

Khatri, Roshan; K C, Sanjay; Shrestha, Prabodh; Sinha, J N

2013-01-01

Quality control is an essential component in every clinical laboratory which maintains the excellence of laboratory standards, supplementing to proper disease diagnosis, patient care and resulting in overall strengthening of health care system. Numerous quality control schemes are available, with combinations of procedures, most of which are tedious, time consuming and can be "too technical" whereas commercially available quality control materials can be expensive especially for laboratories in developing nations like Nepal. Here, we present a procedure performed at our centre with self prepared control serum and use of simple statistical tools for quality assurance. The pooled serum was prepared as per guidelines for preparation of stabilized liquid quality control serum from human sera. Internal Quality Assessment was performed on this sample, on a daily basis which included measurement of 12 routine biochemical parameters. The results were plotted on Levey-Jennings charts and analysed with quality control rules, for a period of one month. The mean levels of biochemical analytes in self prepared control serum were within normal physiological range. This serum was evaluated every day along with patients' samples. The results obtained were plotted on control charts and analysed using common quality control rules to identify possible systematic and random errors. Immediate mitigation measures were taken and the dispatch of erroneous reports was avoided. In this study we try to highlight on a simple internal quality control procedure which can be performed by laboratories, with minimum technology, expenditure, and expertise and improve reliability and validity of the test reports.

Quality specification and status of internal quality control of cardiac biomarkers in China from 2011 to 2016.

Science.gov (United States)

Li, Tingting; Wang, Wei; Zhao, Haijian; He, Falin; Zhong, Kun; Yuan, Shuai; Wang, Zhiguo

2017-09-07

This study aimed to investigate the status of internal quality control (IQC) for cardiac biomarkers from 2011 to 2016 so that we can have overall knowledge of the precision level of measurements in China and set appropriate precision specifications. Internal quality control data of cardiac biomarkers, including creatinine kinase MB (CK-MB) (μg/L), CK-MB(U/L), myoglobin (Mb), cardiac troponin I (cTnI), cardiac troponin T (cTnT), and homocysteines (HCY), were collected by a web-based external quality assessment (EQA) system. Percentages of laboratories meeting five precision quality specifications for current coefficient of variations (CVs) were calculated. Then, appropriate precision specifications were chosen for these six analytes. Finally, the CVs and IQC practice were further analyzed with different grouping methods. The current CVs remained nearly constant for 6 years. cTnT had the highest pass rates every year against five specifications, whereas HCY had the lowest pass rates. Overall, most analytes had a satisfactory performance (pass rates >80%), except for HCY, if one-third TEa or the minimum specification were employed. When the optimal specification was applied, the performance of most analytes was frustrating (pass rates < 60%) except for cTnT. The appropriate precision specifications of Mb, cTnI, cTnT and HCY were set as current CVs less than 9.20%, 9.90%, 7.50%, 10.54%, 7.63%, and 6.67%, respectively. The data of IQC practices indicated wide variation and substantial progress. The precision performance of cTnT was already satisfying, while the other five analytes, especially HCY, were still frustrating; thus, ongoing investigation and continuous improvement for IQC are still needed. © 2017 Wiley Periodicals, Inc.

Design, construction and quality control of resistive-Micromegas anode boards for the ATLAS experiment

Science.gov (United States)

Kuger, F.; Iengo, P.

2018-02-01

For the upcoming upgrade of the forward muon stations of the ATLAS detector, 1280m2 of Micromegas chambers have to be constructed. The industrialization of anode board production is an essential precondition. Design and construction methods of these boards have been optimized towards mass production. In parallel quality control procedures have been developed and established. The first set of large size Micromegas anode boards has finally been produced in industries and demonstrates the feasibility of the project on full-scale.

40 CFR 81.117 - Southeast Missouri Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.117 Section 81.117 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.117 Southeast Missouri Intrastate Air Quality Control Region. The Southeast Missouri Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.45 - Metropolitan Atlanta Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.45 Section 81.45 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.45 Metropolitan Atlanta Intrastate Air Quality Control Region. The Metropolitan Atlanta Intrastate Air Quality Control Region (Georgia) has been revised to consist of the...

40 CFR 81.123 - Southeastern Oklahoma Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.123 Section 81.123 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.123 Southeastern Oklahoma Intrastate Air Quality Control Region. The Southeastern Oklahoma Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.98 - Burlington-Keokuk Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.98 Section 81.98 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.98 Burlington-Keokuk Interstate Air Quality Control Region. The Burlington-Keokuk Interstate Air Quality Control Region (Illinois-Iowa) is revised to consist of the...

40 CFR 81.49 - Southeast Florida Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.49 Section 81.49 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.49 Southeast Florida Intrastate Air Quality Control Region. The Southeast Florida Intrastate Air Quality Control Region is redesignated to consist of the territorial area...

40 CFR 81.59 - Cumberland-Keyser Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.59 Section 81.59 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.59 Cumberland-Keyser Interstate Air Quality Control Region. The Cumberland-Keyser Interstate Air Quality Control Region (Maryland-West Virginia) has been revised to consist...

40 CFR 81.20 - Metropolitan Cincinnati Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.20 Section 81.20 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.20 Metropolitan Cincinnati Interstate Air Quality Control Region. The Metropolitan Cincinnati Interstate Air Quality Control Region (Ohio-Kentucky-Indiana) is revised to consist of...

40 CFR 81.97 - Southwest Florida Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.97 Section 81.97 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.97 Southwest Florida Intrastate Air Quality Control Region. The Southwest Florida Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.116 - Northern Missouri Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.116 Section 81.116 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.116 Northern Missouri Intrastate Air Quality Control Region. The Northern Missouri Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.67 - Lake Michigan Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.67 Lake Michigan Intrastate Air Quality Control Region. The Menominee-Escanaba (Michigan)-Marinette (Wisconsin) Interstate Air Quality Control Region has been renamed the Lake Michigan Intrastate Air Quality Control Region (Wisconsin) and revised to consist of the territorial area...

40 CFR 81.34 - Metropolitan Dayton Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.34 Section 81.34 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.34 Metropolitan Dayton Intrastate Air Quality Control Region. The Metropolitan Dayton Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.115 - Northwest Nevada Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.115 Section 81.115 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.115 Northwest Nevada Intrastate Air Quality Control Region. The Northwest Nevada Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.41 - Metropolitan Birmingham Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.41 Section 81.41 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.41 Metropolitan Birmingham Intrastate Air Quality Control Region. The Metropolitan Birmingham Intrastate Air Quality Control Region (Alabama) has been revised to consist of the...

40 CFR 81.14 - Metropolitan Chicago Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.14 Section 81.14 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.14 Metropolitan Chicago Interstate Air Quality Control Region. The Metropolitan Chicago Interstate Air Quality Control Region (Illinois-Indiana) is revised to consist of the...

40 CFR 81.118 - Southwest Missouri Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.118 Section 81.118 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.118 Southwest Missouri Intrastate Air Quality Control Region. The Southwest Missouri Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

40 CFR 81.122 - Mississippi Delta Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.122 Section 81.122 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.122 Mississippi Delta Intrastate Air Quality Control Region. The Mississippi Delta Intrastate Air Quality Control Region consists of the territorial area encompassed by the...

CONCRETE STRUCTURES' QUALITY CONTROL IN PRACTICE

OpenAIRE

Dolaček-Alduk, Zlata; Blanda, Miroslav

2011-01-01

The Croatian civil engineering is characterized by a lack of systematic approach to planning, control and quality assurance in all phases of project realization. The results obtained in establishing the quality management system in some segments of civil engineering production represent initial trends in solving this problem. Benefits are of two types: the achievement of quality for the contractor and obtaining that quaity is being achieved for clients. Execution of concrete structures is a c...

Recent Progress toward Microfluidic Quality Control Testing of Radiopharmaceuticals

Directory of Open Access Journals (Sweden)

Noel S. Ha

2017-11-01

Full Text Available Radiopharmaceuticals labeled with short-lived positron-emitting or gamma-emitting isotopes are injected into patients just prior to performing positron emission tomography (PET or single photon emission tomography (SPECT scans, respectively. These imaging modalities are widely used in clinical care, as well as in the development and evaluation of new therapies in clinical research. Prior to injection, these radiopharmaceuticals (tracers must undergo quality control (QC testing to ensure product purity, identity, and safety for human use. Quality tests can be broadly categorized as (i pharmaceutical tests, needed to ensure molecular identity, physiological compatibility and that no microbiological, pyrogenic, chemical, or particulate contamination is present in the final preparation; and (ii radioactive tests, needed to ensure proper dosing and that there are no radiochemical and radionuclidic impurities that could interfere with the biodistribution or imaging. Performing the required QC tests is cumbersome and time-consuming, and requires an array of expensive analytical chemistry equipment and significant dedicated lab space. Calibrations, day of use tests, and documentation create an additional burden. Furthermore, in contrast to ordinary pharmaceuticals, each batch of short-lived radiopharmaceuticals must be manufactured and tested within a short period of time to avoid significant losses due to radioactive decay. To meet these challenges, several efforts are underway to develop integrated QC testing instruments that automatically perform and document all of the required tests. More recently, microfluidic quality control systems have been gaining increasing attention due to vastly reduced sample and reagent consumption, shorter analysis times, higher detection sensitivity, increased multiplexing, and reduced instrumentation size. In this review, we describe each of the required QC tests and conventional testing methods, followed by a

Technical quality control - constancy controls for digital mammography systems

International Nuclear Information System (INIS)

Pedersen, K.; Landmark, I.D.; Bredholt, K.; Hauge, I.H.R.

2009-04-01

To ensure the quality of mammographic images, so-called constancy control tests are performed frequently. The report contains a programme for constancy control of digital mammography systems, encompassing the mammography unit, computed radiography (CR) systems, viewing conditions and displays, printers, and procedures for data collection for patient dose calculations. (Author)

NIF Projects Controls and Information Systems Software Quality Assurance Plan

Energy Technology Data Exchange (ETDEWEB)

Fishler, B

2011-03-18

Quality achievement for the National Ignition Facility (NIF) and the National Ignition Campaign (NIC) is the responsibility of the NIF Projects line organization as described in the NIF and Photon Science Directorate Quality Assurance Plan (NIF QA Plan). This Software Quality Assurance Plan (SQAP) is subordinate to the NIF QA Plan and establishes quality assurance (QA) activities for the software subsystems within Controls and Information Systems (CIS). This SQAP implements an activity level software quality assurance plan for NIF Projects as required by the LLNL Institutional Software Quality Assurance Program (ISQAP). Planned QA activities help achieve, assess, and maintain appropriate quality of software developed and/or acquired for control systems, shot data systems, laser performance modeling systems, business applications, industrial control and safety systems, and information technology systems. The objective of this SQAP is to ensure that appropriate controls are developed and implemented for management planning, work execution, and quality assessment of the CIS organization's software activities. The CIS line organization places special QA emphasis on rigorous configuration control, change management, testing, and issue tracking to help achieve its quality goals.

NIF Projects Controls and Information Systems Software Quality Assurance Plan

International Nuclear Information System (INIS)

Fishler, B.

2011-01-01

Quality achievement for the National Ignition Facility (NIF) and the National Ignition Campaign (NIC) is the responsibility of the NIF Projects line organization as described in the NIF and Photon Science Directorate Quality Assurance Plan (NIF QA Plan). This Software Quality Assurance Plan (SQAP) is subordinate to the NIF QA Plan and establishes quality assurance (QA) activities for the software subsystems within Controls and Information Systems (CIS). This SQAP implements an activity level software quality assurance plan for NIF Projects as required by the LLNL Institutional Software Quality Assurance Program (ISQAP). Planned QA activities help achieve, assess, and maintain appropriate quality of software developed and/or acquired for control systems, shot data systems, laser performance modeling systems, business applications, industrial control and safety systems, and information technology systems. The objective of this SQAP is to ensure that appropriate controls are developed and implemented for management planning, work execution, and quality assessment of the CIS organization's software activities. The CIS line organization places special QA emphasis on rigorous configuration control, change management, testing, and issue tracking to help achieve its quality goals.

40 CFR 81.48 - Champlain Valley Interstate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Region. 81.48 Section 81.48 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Air Quality Control Regions § 81.48 Champlain Valley Interstate Air Quality Control Region. The Champlain Valley Interstate Air Quality Control Region (Vermont-New York) has been revised to consist of the...

Optimization of spatial light distribution through genetic algorithms for vision systems applied to quality control

International Nuclear Information System (INIS)

Castellini, P; Cecchini, S; Stroppa, L; Paone, N

2015-01-01

The paper presents an adaptive illumination system for image quality enhancement in vision-based quality control systems. In particular, a spatial modulation of illumination intensity is proposed in order to improve image quality, thus compensating for different target scattering properties, local reflections and fluctuations of ambient light. The desired spatial modulation of illumination is obtained by a digital light projector, used to illuminate the scene with an arbitrary spatial distribution of light intensity, designed to improve feature extraction in the region of interest. The spatial distribution of illumination is optimized by running a genetic algorithm. An image quality estimator is used to close the feedback loop and to stop iterations once the desired image quality is reached. The technique proves particularly valuable for optimizing the spatial illumination distribution in the region of interest, with the remarkable capability of the genetic algorithm to adapt the light distribution to very different target reflectivity and ambient conditions. The final objective of the proposed technique is the improvement of the matching score in the recognition of parts through matching algorithms, hence of the diagnosis of machine vision-based quality inspections. The procedure has been validated both by a numerical model and by an experimental test, referring to a significant problem of quality control for the washing machine manufacturing industry: the recognition of a metallic clamp. Its applicability to other domains is also presented, specifically for the visual inspection of shoes with retro-reflective tape and T-shirts with paillettes. (paper)

Concept and realization of quality control in FRG

International Nuclear Information System (INIS)

Odoj, R.; Martens, B.R.; Warnecke, E.

1987-01-01

Radioactive waste packages to be disposed of in FRG must meet the waste acceptance requirement of the repository. Compliance with the waste acceptance requirements must be checked by a quality control. Fourteen relevant properties are necessary to be assayed. The quality control group supports the observance of the waste acceptance requirements by the following measures: -checking of the documentation of the waste producers; -random tests at conditioned radioactive wastes; -qualification of conditioning processes; -control of the qualified processes by inspections. The relevant properties of disposal are termed and their checking by non-destructive and if necessary destructive test methods will be explained as well as quality control by process control, i.e. qualification of conditioning processes by instrumentation and documentation. The mobile and stationary testing facilities will be outlined

Imaging Food Quality

DEFF Research Database (Denmark)

Møller, Flemming

Imaging and spectroscopy have long been established methods for food quality control both in the laboratories and online. An ever increasing number of analytical techniques are being developed into imaging methods and existing imaging methods to contain spectral information. Images and especially...... spectral images contain large amounts of data which should be analysed appropriately by techniques combining structure and spectral information. This dissertation deals with how different types of food quality can be measured by imaging techniques, analysed with appropriate image analysis techniques...... and finally use the image data to predict or visualise food quality. A range of different food quality parameters was addressed, i.e. water distribution in bread throughout storage, time series analysis of chocolate milk stability, yoghurt glossiness, graininess and dullness and finally structure and meat...

Frontiers in statistical quality control 11

CERN Document Server

Schmid, Wolfgang

2015-01-01

The main focus of this edited volume is on three major areas of statistical quality control: statistical process control (SPC), acceptance sampling and design of experiments. The majority of the papers deal with statistical process control, while acceptance sampling and design of experiments are also treated to a lesser extent. The book is organized into four thematic parts, with Part I addressing statistical process control. Part II is devoted to acceptance sampling. Part III covers the design of experiments, while Part IV discusses related fields. The twenty-three papers in this volume stem from The 11th International Workshop on Intelligent Statistical Quality Control, which was held in Sydney, Australia from August 20 to August 23, 2013. The event was hosted by Professor Ross Sparks, CSIRO Mathematics, Informatics and Statistics, North Ryde, Australia and was jointly organized by Professors S. Knoth, W. Schmid and Ross Sparks. The papers presented here were carefully selected and reviewed by the scientifi...

Electronic quality control on dental x-rays equipment

International Nuclear Information System (INIS)

Pomares C, Martin

1996-09-01

A brief description of dental x-ray equipment is done. The non-invasive quality control is treated as than the responsibilities from the dentists to the patient and the equipment. A propose for quality control for dental x-ray equipment, film and developer is include

QUALITY CONTROL OF SOME TRADITIONAL MEAT PRODUCTS

Directory of Open Access Journals (Sweden)

S. DOBRINAS

2014-03-01

Full Text Available In this paper, we present the characterization of six traditional meat products: smoked file, smoked bacon, pork sausages, sausage prepared from swine’s entrails, pork pastrami, sheep sausages. Organoleptic tests (the aspect and shape, the aspect of freshly cut in the section, smell, taste and consistency, physico-chemical and microbiological determinations (NTG, Salmonella, Listeria monocytogenes and Escherichia coli were performed. These analyzes are a part of quality control that must be done in order to obtain a certificate from the Ministry of Agriculture for a traditional product. After identification of H2S and starch and according to fat oxidation degree it was concluded that analyzed samples didn’t contain counterfeiters and all parameters analyzed are within the maximum limits allowed by law. Considering all the procedures for manufacturing, characteristics of raw and auxiliary materials, organoleptic properties of final products analyzed in this study, it can be concluded that analyzed meat specialties meet the requirements of Ministry Order no. 690/28.09.2004 for the traditional products certification.

APPLICATION OF HIDDEN MARKOV CHAINS IN QUALITY CONTROL

Directory of Open Access Journals (Sweden)

Hanife DEMIRALP

2013-01-01

Full Text Available The ever growing technological innovations and sophistication in industrial processes require adequate checks on quality. Thus, there is an increasing demand for simple and efficient quality control methods. In this regard the control charts stand out in simplicity and efficiency. In this paper, we propose a method of controlling quality based on the theory of hidden Markov chains. Based on samples drawn at different times from the production process, the method obtains the state of the process probabilistically. The main advantage of the method is that it requires no assumption on the normality of the process output.

QUALITY IMPROVEMENT USING STATISTICAL PROCESS CONTROL TOOLS IN GLASS BOTTLES MANUFACTURING COMPANY

Directory of Open Access Journals (Sweden)

Yonatan Mengesha Awaj

2013-03-01

Full Text Available In order to survive in a competitive market, improving quality and productivity of product or process is a must for any company. This study is about to apply the statistical process control (SPC tools in the production processing line and on final product in order to reduce defects by identifying where the highest waste is occur at and to give suggestion for improvement. The approach used in this study is direct observation, thorough examination of production process lines, brain storming session, fishbone diagram, and information has been collected from potential customers and company's workers through interview and questionnaire, Pareto chart/analysis and control chart (p-chart was constructed. It has been found that the company has many problems; specifically there is high rejection or waste in the production processing line. The highest waste occurs in melting process line which causes loss due to trickle and in the forming process line which causes loss due to defective product rejection. The vital few problems were identified, it was found that the blisters, double seam, stone, pressure failure and overweight are the vital few problems. The principal aim of the study is to create awareness to quality team how to use SPC tools in the problem analysis, especially to train quality team on how to held an effective brainstorming session, and exploit these data in cause-and-effect diagram construction, Pareto analysis and control chart construction. The major causes of non-conformities and root causes of the quality problems were specified, and possible remedies were proposed. Although the company has many constraints to implement all suggestion for improvement within short period of time, the company recognized that the suggestion will provide significant productivity improvement in the long run.

22 CFR 96.39 - Information disclosure and quality control practices.

Science.gov (United States)

2010-04-01

... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Information disclosure and quality control... for Convention Accreditation and Approval Information Disclosure, Fee Practices, and Quality Control Policies and Practices § 96.39 Information disclosure and quality control practices. (a) The agency or...

Neuropsychiatric symptoms and quality of life in patients in the final phase of dementia.

NARCIS (Netherlands)

Koopmans, R.T.C.M.; Molen, M. van der; Raats, M.; Ettema, T.P.

2009-01-01

OBJECTIVES: To assess neuropsychiatric symptoms and quality of life in a group of patients in the final phase of dementia. METHODS: All patients with dementia (n = 216) residing on dementia special care units of two Dutch nursing homes were included in the study provided they met the criteria for

Automatic analysis of image quality control for Image Guided Radiation Therapy (IGRT) devices in external radiotherapy

International Nuclear Information System (INIS)

Torfeh, Tarraf

2009-01-01

On-board imagers mounted on a radiotherapy treatment machine are very effective devices that improve the geometric accuracy of radiation delivery. However, a precise and regular quality control program is required in order to achieve this objective. Our purpose consisted of developing software tools dedicated to an automatic image quality control of IGRT devices used in external radiotherapy: 2D-MV mode for measuring patient position during the treatment using high energy images, 2D-kV mode (low energy images) and 3D Cone Beam Computed Tomography (CBCT) MV or kV mode, used for patient positioning before treatment. Automated analysis of the Winston and Lutz test was also proposed. This test is used for the evaluation of the mechanical aspects of treatment machines on which additional constraints are carried out due to the on-board imagers additional weights. Finally, a technique of generating digital phantoms in order to assess the performance of the proposed software tools is described. Software tools dedicated to an automatic quality control of IGRT devices allow reducing by a factor of 100 the time spent by the medical physics team to analyze the results of controls while improving their accuracy by using objective and reproducible analysis and offering traceability through generating automatic monitoring reports and statistical studies. (author) [fr

Quality control of commercial bovine lactoferrin.

Science.gov (United States)

Wakabayashi, Hiroyuki; Yamauchi, Koji; Abe, Fumiaki

2018-06-01

Herein we review commercial bovine lactoferrin quality issues by describing an example of industrial production, the current status of global quality standardization, and quality-activity concerns for further discussion. Morinaga Milk Industry has been industrially producing bovine lactoferrin in Milei GmbH, Germany, since 1989. We delineate its production and quality as an example of safe and high-quality manufacturing. Currently, global standardization in the quality of bovine lactoferrin is progressing through Novel Food and GRAS in the EU and USA, respectively. Novel Food was applied or notified to seven lactoferrin manufacturers and GRAS was notified to three manufacturers, two of which are for infant use and one is for adult use, by the end of 2017. The specifications of these regulations are relatively high, including more than 95% lactoferrin purity in protein, which means that such companies can supply relatively high-grade lactoferrin. There appear to be several concerns regarding lactoferrin quality affecting activities, including contamination of lipopolysaccharide (LPS) and angiogenin, purity, and degradation of lactoferrin sample. Although LPS is immunologically toxic when invading the body, it is distributed normally in foods and the gut. However, an industrial lactoferrin sample may contain LPS at a maximum LPS/lactoferrin molecule ratio = 1/1724, which means 99.9% of the lactoferrin molecule is LPS-free. It is difficult to speculate that LPS contained in a lactoferrin sample affects its activities. Finally in order to achieve good and reproducible results, we make proposals to researchers a use of high-grade lactoferrin, careful storage, and indication the manufacturers' names and specifications in the paper.

Ocean Data Quality Control

Science.gov (United States)

2011-11-18

the aero- sol at the coincident time and location of the satellite SST retrievals. This informa- tion is available in the daytime for the anti-solar...are of the same form, such as probabilities or standard normal deviates. A quality control decision-making algorithm in use at the U.S. Navy oceano

Some observations about quality control tests of Spect

International Nuclear Information System (INIS)

Robilotta, C.C.; Rebelo, M.F.S.; Oliveira, M.A.

1987-01-01

Some observations about quality control tests done in the tomographic system of Heart Institute are described. Among the tests, the traditional test of quality control with scintillation camera and the specific test for tomography systems are induced. The traditional tests are essential, but not sufficient for evaluating the Spect equipment and the specific tests have been effectuated in controlled conditions. (C.G.C.) [pt

Quality Controlling CMIP datasets at GFDL

Science.gov (United States)

Horowitz, L. W.; Radhakrishnan, A.; Balaji, V.; Adcroft, A.; Krasting, J. P.; Nikonov, S.; Mason, E. E.; Schweitzer, R.; Nadeau, D.

2017-12-01

As GFDL makes the switch from model development to production in light of the Climate Model Intercomparison Project (CMIP), GFDL's efforts are shifted to testing and more importantly establishing guidelines and protocols for Quality Controlling and semi-automated data publishing. Every CMIP cycle introduces key challenges and the upcoming CMIP6 is no exception. The new CMIP experimental design comprises of multiple MIPs facilitating research in different focus areas. This paradigm has implications not only for the groups that develop the models and conduct the runs, but also for the groups that monitor, analyze and quality control the datasets before data publishing, before their knowledge makes its way into reports like the IPCC (Intergovernmental Panel on Climate Change) Assessment Reports. In this talk, we discuss some of the paths taken at GFDL to quality control the CMIP-ready datasets including: Jupyter notebooks, PrePARE, LAMP (Linux, Apache, MySQL, PHP/Python/Perl): technology-driven tracker system to monitor the status of experiments qualitatively and quantitatively, provide additional metadata and analysis services along with some in-built controlled-vocabulary validations in the workflow. In addition to this, we also discuss the integration of community-based model evaluation software (ESMValTool, PCMDI Metrics Package, and ILAMB) as part of our CMIP6 workflow.

40 CFR 81.76 - State of Hawaii Air Quality Control Region.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 17 2010-07-01 2010-07-01 false State of Hawaii Air Quality Control... PROGRAMS (CONTINUED) DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES Designation of Air Quality Control Regions § 81.76 State of Hawaii Air Quality Control Region. The State of Hawaii Air Quality...

Technology requirement for Halal quality control | Husny | Journal of ...

African Journals Online (AJOL)

Technology requirement for Halal quality control. ... Findings show that each industry segments have different technology characteristics preference. ... Keywords: halal industry, quality control; technology assistance; food and beverage; ...

Internal cost control on the ecological quality of products

Directory of Open Access Journals (Sweden)

N.P. Syroid

2018-04-01

Full Text Available To improve the environmental quality of products due attention should be paid to control the processes related to environmental quality input of the product. The results of the study help to state the purpose and objectives of the control, also to define objects for internal control of operations cost of environmental quality. So, we believe that the main purpose of internal cost control on the ecological quality of products is the establishment of the correctness and legality of business operations, prevention of violations and abuses in the expenditure of natural, labour, material and financial resources to ensure the minimization of negative impact on the health of consumers and the environment. The basic objectives of internal control of expenditure are brought forward, but it should be noted that they can vary and depend on the size, structure, spheres and types of economic activity of the enterprise, the requirements of management personnel. In the process of identifying the objects of control of environmental quality it should be noted that this list is not exhaustive, but it is most relevant to highlight objects such as genetically modified organisms and waste production. Also the subjects of cost control to environmental quality, their functions and the information base for monitoring are determined. Proper organization of the process of internal cost control on the ecological quality of products would benefit from a clear documentation of transactions, timely and complete registration of accounting data in the registers, the true reflection of information in managerial financial reporting and ensure reduction of the negative impact on the health of consumers and the environment.

The regulatory maze of quality control

International Nuclear Information System (INIS)

Stone, T.I.

1987-01-01

The appropriateness of specific procedures within a quality control program becomes difficult to assess when an attempt is made to collate all of the available information. This task is discussed from the perspective of the Joint Commission (JCAH Accreditation Manual), HHS(quality assurance program recommendations), equipment manufacturers maintenance schedules, and radiology administrative cost concerns

Advanced methods of quality control in nuclear fuel fabrication

International Nuclear Information System (INIS)

Onoufriev, Vladimir

2004-01-01

Under pressure of current economic and electricity market situation utilities implement more demanding fuel utilization schemes including higher burn ups and thermal rates, longer fuel cycles and usage of Mo fuel. Therefore, fuel vendors have recently initiated new R and D programmes aimed at improving fuel quality, design and materials to produce robust and reliable fuel. In the beginning of commercial fuel fabrication, emphasis was given to advancements in Quality Control/Quality Assurance related mainly to product itself. During recent years, emphasis was transferred to improvements in process control and to implementation of overall Total Quality Management (TQM) programmes. In the area of fuel quality control, statistical control methods are now widely implemented replacing 100% inspection. This evolution, some practical examples and IAEA activities are described in the paper. The paper presents major findings of the latest IAEA Technical Meetings (TMs) and training courses in the area with emphasis on information received at the TM and training course held in 1999 and other latest publications to provide an overview of new developments in process/quality control, their implementation and results obtained including new approaches to QC

Quality control of PET/CT

International Nuclear Information System (INIS)

Angelova, J.; Zajcharov, M.

2013-01-01

Full text: Introduction: The aim of this work is to undertake a review of the methods for checking and adjusting the computer and positron emission tomography in the Hospital 'Alexandrovska' by the attached to the equipment phantoms according to the manufacturer prescription in order to fulfill its requirements for the entry of the main parameters image within certain limits. Materials and Methods: At the start of work a check of the lasers setting for patient positioning and 'heat' of the X-ray tube scanner to better image quality were made. Daily verification procedures on the image quality of CT through the water phantom and weekly - 'air' calibration were carried out. In positron part, daily control involves setting the resolution and sensitivity of the scanner through built Ga68 phantom. When commissioning, after repair and at least once a year, it is necessary to verify the accuracy of registration of the pulses from the crystal with a water phantom of known volume and the coincidence between CT and PET image. Results: The process of quality control is interactive. The results are displayed in tables and graphically, with the goal the individual values to fall within the determined by manufacturers range and to meet the standards for image quality. If necessary, the procedure repeats several times until it is fulfilled. Conclusion: Ensuring the quality of the image in positron emission tomography combined with computed tomography, is inextricably linked to accurate and precise diagnosis of tumor processes in the human body

Information-Quality based LV-Grid-Monitoring Framework and its Application to Power-Quality Control

DEFF Research Database (Denmark)

Findrik, Mislav; Kristensen, Thomas le Fevre; Hinterhofer, Thomas

2015-01-01

The integration of unpredictable renewable energy sources into the low voltage (LV) power grid results in new challenges when it comes to ensuring power quality in the electrical grid. Addressing this problem requires control of not only the secondary substation but also control of flexible assets...... inside the LV grid. In this paper we investigate how the flexibility information of such assets can be accessed by the controller using heterogeneous off-the-shelf communication networks. To achieve this we develop an adaptive monitoring framework, through which the controller can subscribe to the assets......' flexibility information through an API. We define an information quality metric making the monitoring framework able to adapt information access strategies to ensure the information is made available to the controller with the highest possible information quality. To evaluate the monitoring framework...

Optimization of production and quality control of therapeutic radionuclides and radiopharmaceuticals. Final report of a co-ordinated research project 1994-1998

Energy Technology Data Exchange (ETDEWEB)

NONE

1999-09-01

The `renaissance` of the therapeutic applications of radiopharmaceuticals during the last few years was in part due to a greater availability of radionuclides with appropriate nuclear decay properties, as well as to the development of carrier molecules with improved characteristics. Although radionuclides such as {sup 32}P, {sup 89}Sr and {sup 131}I, were used from the early days of nuclear medicine in the late 1930s and early 1940s, the inclusion of other particle emitting radionuclides into the nuclear medicine armamentarium was rather late. Only in the early 1980s did the specialized scientific literature start to show the potential for using other beta emitting nuclear reactor produced radionuclides such as {sup 153}Sm, {sup 166} Ho, {sup 165}Dy and {sup 186-188}Re. Bone seeking agents radiolabelled with the above mentioned beta emitting radionuclides demonstrated clear clinical potential in relieving intense bone pain resulting from metastases of the breast, prostate and lung of cancer patients. Therefore, upon the recommendation of a consultants meeting held in Vienna in 1993, the Co-ordinated Research Project (CRP) on Optimization of the Production and quality control of Radiotherapeutic Radionuclides and Radiopharmaceuticals was established in 1994. The CRP aimed at developing and improving existing laboratory protocols for the production of therapeutic radionuclides using existing nuclear research reactors including the corresponding radiolabelling, quality control procedures; and validation in experimental animals. With the participation of ten scientists from IAEA Member States, several laboratory procedures for preparation and quality control were developed, tested and assessed as potential therapeutic radiopharmaceuticals for bone pain palliation. In particular, the CRP optimised the reactor production of {sup 153}Sm and the preparation of the radiopharmaceutical {sup 153}Sm-EDTMP (ethylene diamine tetramethylene phosphonate), as well as radiolabelling

Quality control protocols for radiodiagnosis agents and radiopharmaceuticals

International Nuclear Information System (INIS)

Robles, A.; Condor, M.; Caballero, J.; Morote, M.; Garcia, C.; Benites, M.

1997-01-01

Based on the compilation of pharmacopoeia methods, literature, manuals and other information developed in our laboratory, protocols have been prepared to carry out quality controls for radiodiagnosis agents (RDA), better known as kits and RDA labelled with Tc99m. Quality control protocols cover physicochemical and biological controls. Physicochemical controls described for RDA include physical characteristics, particle size and number, pH, chemical identification, humidity, tin II; whereas biological controls include sterility, acute toxicity and bacterial endotoxin determination (LAL). Physicochemical controls described for radiopharmaceuticals labelled with Tc99m are pH and radiochemical purity; while biological distribution is described as a biological control

Quality control of conventional radiographic facilities in Kinshasa

International Nuclear Information System (INIS)

Woto, M.L.; Lukanda, M.V.; Mulumba, L.C.P.; Palangu

2009-01-01

The continuous development of medical applications of ionizing radiation, due to the benefit derived by diagnostic or therapeutic patients, their diversity, ease of implementation, explains the importance of medical exposure. The latter is currently the leading cause of human exposure to artificial origin. The purpose of this study is to contribute to the optimization of radiographic facilities in the city of Kinshasa. This study has revealed that city of Kinshasa has an average of 122 medical training with conventional radiology facilities distributed in six districts of health. Of the 122 facilities, only 30 (or 24.59%) are controlled from the point of view of quality assurance. Some generators and X-ray tubes are respectively controlled adjustment and de centered, and other devices are cannibalized. So, nationally and particularly in Kinshasa, quality control equipment and diagnostic facilities is at a generally delayed compared with international recommendations of X W. Major efforts must be made at government level to raise awareness and establish a quality assurance program in diagnostic radiology. An awareness of the entire medical profession and the competent administrative authorities of medical devices could be beneficial to the quality of care delivered to patients, limiting radiation exposure and improving image quality and only the financial balance of the health sector. The delivery of quality care passes through the justification of acts, the development and dissemination of good practice references and the establishment of quality control radiological installations.

Quality control of radiodiagnostics

International Nuclear Information System (INIS)

Alonso Diaz, M.; Castaneda Arronte, M.J.; Matorras Galan, P.; Diaz-Caneja Rodriguez, N.; Gutierrez Diaz Velarde, I.

1993-01-01

Since May 1990, a program of quality control of diagnostic X-ray equipment is underway in the University Hospital Marques de Valdecilla. This includes the design and application of measuring specifications and procedures corresponding to the different parameters of the equipment. The specified values are presented, as are those obtained for geometric and exposition parameters using the equipment. The specifications for the geometric parameters are fulfilled in an large proportion (between 52 and 86%) of the units, and the rest can easily be adjusted. However, 85% of the units can be made to operate with a field larger than that of the screen of the image monitor and approximately half of them can operate at a shorter focus-to-patient distance than that specified. With respect to the exposition parameters, in general, these units do not fulfill the specifications and their behavior is not uniform. The results obtained indicate that the equipment studied could be made to comply with the proposed specifications if a Maintenance Program were initiated in coordination with that of Quality Control. (Author)

75 FR 39252 - Release of Final Documents Related to the Review of the National Ambient Air Quality Standards...

Science.gov (United States)

2010-07-08

... Quality Standards: Scope and Methods Plan for Health Risk and Exposure Assessment and Particulate Matter... ENVIRONMENTAL PROTECTION AGENCY [EPA-HQ-OAR-2007-0492; FRL-9171-8] Release of Final Documents...: Environmental Protection Agency (EPA). ACTION: Notice of Availability. SUMMARY: The Office of Air Quality...

Management Model for efficient quality control in new buildings

Directory of Open Access Journals (Sweden)

C. E. Rodríguez-Jiménez

2017-09-01

Full Text Available The management of the quality control of each building process is usually set up in Spain from different levels of demand. This work tries to obtain a model of reference, to compare the quality control of the building process of a specific product (building, and to be able to evaluate its warranty level. In the quest of this purpose, we take credit of specialized sources and 153 real cases of Quality Control were carefully revised using a multi-judgment method. Applying different techniques to get a specific valuation (impartial of the input parameters through Delphi’s method (17 experts query, whose matrix treatment with the Fuzzy-QFD tool condenses numerical references through a weighted distribution of the selected functions and their corresponding conditioning factors. The model thus obtained (M153 is useful in order to have a quality control reference to meet the expectations of the quality.

Exposure parameters in fluoroscopy equipment. Quality control

International Nuclear Information System (INIS)

Alonso, M.; Castaneda, M.J.; Matorras, P.; Diaz-Caneja, N.; Gutierrez, I.

1992-01-01

Within the quality control program in Diagnostic Radiology currently being undertaken at the 'Marques de Valdecilla' University Hospital, the corresponding specification and procedure prototypes for the control of conventional radioscopy equipment have been elaborated and applied. This paper presents the values proposed in the specifications and those obtained for the following radioscopy equipment parameters: reference kerma, and its reproducibility, kerma linearity, maximum kerma at the skin, and total filtration. The results obtained indicate that the equipment studied could comply with specified requirements if a Maintenance Program were to be implemented in coordination with the Quality Control Program. (author)

SAQC: SNP Array Quality Control

Directory of Open Access Journals (Sweden)

Li Ling-Hui

2011-04-01

Full Text Available Abstract Background Genome-wide single-nucleotide polymorphism (SNP arrays containing hundreds of thousands of SNPs from the human genome have proven useful for studying important human genome questions. Data quality of SNP arrays plays a key role in the accuracy and precision of downstream data analyses. However, good indices for assessing data quality of SNP arrays have not yet been developed. Results We developed new quality indices to measure the quality of SNP arrays and/or DNA samples and investigated their statistical properties. The indices quantify a departure of estimated individual-level allele frequencies (AFs from expected frequencies via standardized distances. The proposed quality indices followed lognormal distributions in several large genomic studies that we empirically evaluated. AF reference data and quality index reference data for different SNP array platforms were established based on samples from various reference populations. Furthermore, a confidence interval method based on the underlying empirical distributions of quality indices was developed to identify poor-quality SNP arrays and/or DNA samples. Analyses of authentic biological data and simulated data show that this new method is sensitive and specific for the detection of poor-quality SNP arrays and/or DNA samples. Conclusions This study introduces new quality indices, establishes references for AFs and quality indices, and develops a detection method for poor-quality SNP arrays and/or DNA samples. We have developed a new computer program that utilizes these methods called SNP Array Quality Control (SAQC. SAQC software is written in R and R-GUI and was developed as a user-friendly tool for the visualization and evaluation of data quality of genome-wide SNP arrays. The program is available online (http://www.stat.sinica.edu.tw/hsinchou/genetics/quality/SAQC.htm.

HANDBOOK: QUALITY ASSURANCE/QUALITY CONTROL (QA/QC) PROCEDURES FOR HAZARDOUS WASTE INCINERATION

Science.gov (United States)

Resource Conservation and Recovery Act regulations for hazardous waste incineration require trial burns by permit applicants. uality Assurance Project Plan (QAPjP) must accompany a trial burn plan with appropriate quality assurance/quality control procedures. uidance on the prepa...

Quality control system response to stochastic growth of amyloid fibrils

DEFF Research Database (Denmark)

Pigolotti, S.; Lizana, L.; Sneppen, K.

2013-01-01

We introduce a stochastic model describing aggregation of misfolded proteins and degradation by the protein quality control system in a single cell. Aggregate growth is contrasted by the cell quality control system, that attacks them at different stages of the growth process, with an efficiency...... that decreases with their size. Model parameters are estimated from experimental data. Two qualitatively different behaviors emerge: a homeostatic state, where the quality control system is stable and aggregates of large sizes are not formed, and an oscillatory state, where the quality control system...

Quality Minus Junk

DEFF Research Database (Denmark)

Asness, Clifford S.; Frazzini, Andrea; Heje Pedersen, Lasse

We define a quality security as one that has characteristics that, all-else-equal, an investor should be willing to pay a higher price for: stocks that are safe, profitable, growing, and well managed. High-quality stocks do have higher prices on average, but not by a very large margin. Perhaps....... The price of quality – i.e., how much investors pay extra for higher quality stocks – varies over time, reaching a low during the internet bubble. Further, a low price of quality predicts a high future return of QMJ. Finally, controlling for quality resurrects the otherwise moribund size effect....

Quality control in haemostasis.

Science.gov (United States)

Capel, P; Chatelain, B; Leclerq, R; Lust, A; Masure, R; Arnout, J

1992-01-01

Laboratory investigation of the haemostatic system deserves particular procedures in the quality control of analytical variables as well as preanalytical variables. This paper reviews the precautions that have to be taken in the blood prelevement, the transport of the tubes and the performance of the laboratory tests aimed to investigate the haemostatic system in order to obtain reliable results.

Quality control of labelled compounds

International Nuclear Information System (INIS)

Matucha, M.

1979-01-01

Some advantages and disadvantages of methods used for quality control of organic labelled compounds (1 31 I, 14 C) are shortly discussed. The methods used are electrophoresis, ultraviolet and infrared spectrometry, radiogas and thin-layer chromatography. (author)

Quality control of mammography

International Nuclear Information System (INIS)

Hering, K.G.

1986-01-01

Random checks of mammograms allow to clearly assess quality controls concerning correct application and operation of the radiographic system indicated by rich contrast in breast tissue images, complete imaging of the mammary parenchyma, freedom from blurs due to motion, efficient breast compression, correct film labelling and perfect maintenance of the film screen system. In addition to these subjective assessments, the following points should be considered when using objective measurement procedures and phantoms: Testing the correct function of X-ray and radiographic equipment by means of test specimens to measure KV standard (KV=Association of German Panel Doctors), mAS and automatic exposure timer; comparing dose and density to initial values and checking film processing by using a sensitometer. Quality assurance handling varies from one KV to the next. That is why the users need to obtain the guidelines of the respective KV relative to radiological quality assurance and to proceed according to these. (orig.) [de

40 CFR 81.17 - Metropolitan Los Angeles Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.17 Metropolitan Los Angeles Air Quality Control Region. The Metropolitan Los Angeles Air Quality Control Region consists of the following territorial area (including the territorial... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Metropolitan Los Angeles Air Quality...

40 CFR 81.32 - Puget Sound Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.32 Puget Sound Intrastate Air Quality Control Region. The Puget Sound Intrastate Air Quality Control Region (Washington) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Puget Sound Intrastate Air Quality...

7 CFR 58.442 - Laboratory and quality control tests.

Science.gov (United States)

2010-01-01

... 7 Agriculture 3 2010-01-01 2010-01-01 false Laboratory and quality control tests. 58.442 Section... Service 1 Operations and Operating Procedures § 58.442 Laboratory and quality control tests. (a) Chemical... Methods or by other methods giving equivalent results. (b) Weight or volume control. Representative...

Preparation and quality control of radiolabelled cobalt-57 bleomycins for oncological studies

International Nuclear Information System (INIS)

Jalilian, A. R.; Rowshanfarzad, P.; Moafian, J.; Ensaf, M. R.; Sabet, M.

2007-01-01

[ 55 Co] bleomycin has been widely used in ontological studies. Due to relative short half life of cobalt-55, optimization and feasibility studies for determination of the best labeling conditions is preferably performed using cobalt-57. In this study, the optimization of complexation conditions for time, temperature and ligand concentration were performed. The best labeling yield was obtained at room temperature in pH of 4-7, using 0.4 mCi of 57 CoCl 2 with 0.3mg of BLM in 30 minutes. The final radiopharmaceutical solution underwent common quality control tests, validating our future studies for animal scanning studies using [ 55 Co]bleomycin complex

Quality control of CANDU6 fuel element in fabrication process

International Nuclear Information System (INIS)

Li Yinxie; Zhang Jie

2012-01-01

To enhance the fine control over all aspects of the production process, improve product quality, fuel element fabrication process for CANDU6 quality process control activities carried out by professional technical and management technology combined mode, the quality of the fuel elements formed around CANDU6 weak links - - end plug , and brazing processes and procedures associated with this aspect of strict control, in improving staff quality consciousness, strengthening equipment maintenance, improved tooling, fixtures, optimization process test, strengthen supervision, fine inspection operations, timely delivery carry out aspects of the quality of information and concerns the production environment, etc., to find the problem from the improvement of product quality and factors affecting the source, and resolved to form the active control, comprehensive and systematic analysis of the problem of the quality management concepts, effectively reducing the end plug weld microstructure after the failure times and number of defects zirconium alloys brazed, improved product quality, and created economic benefits expressly provided, while staff quality consciousness and attention to detail, collaboration department, communication has been greatly improved and achieved very good management effectiveness. (authors)

Quality control in paediatric nuclear medicine

International Nuclear Information System (INIS)

Fischer, S.; Hahn, K.

1997-01-01

Nuclear medicine examinations in children require a maximum in quality. This is true for the preparation of the child and parents, the imaging procedure, processing and documentation. It is necessary that quality control through all steps is performed regularly. The aim must be that the children receive a minimum radiation dose, while there needs to be a high quality in imaging and clinical information from the study. Furthermore the child should not be too much psychologically affected by the nuclear medicine examination. (orig.) [de

Quality assurance and quality control in fabrication of heat exchanger tubes

International Nuclear Information System (INIS)

Duennewald, A.

1980-01-01

Object of this report is the manufacture of heat exchanger tubes. A comprehensive manufacturing and test program has to be established to assure and prove and equal tube quality. This requires a functionally operating quality assurance system combined with a production exactly planned in advance. A specific continuous production line for heat exchanger tubes has been erected at the Hellenthal plant of the Mannesmannroehren-Werke. All production steps and heat treatments are generally controlled by a quality control department. Non-destructive testing of each tube produced in standard length is performed on several agregates in line using ultrasonic and/or eddy current technique. All tests are generally performed in the presence of quality inspectors or surveyors. For a lot of heat exchangers the straight tubes have to be hairpin bended. To avoid the risk of stress corrosion cracking, it is recommended to procreate defined compression stresses in the outside tube surface. Prior to releasing the tubes to shipment, the completeness of the documentation as to the manufacturing steps and inspection agreed upon is thoroughly checked. (RW)

Radiation measurements and quality control

International Nuclear Information System (INIS)

McLaughlin, W.L.

1977-01-01

Accurate measurements are essential to research leading to a successful radiation process and to the commissioning of the process and the facility. On the other hand, once the process is in production, the importance to quality control of measuring radiation quantities (i.e., absorbed dose, dose rate, dose distribution) rather than various other parameters of the process (i.e. conveyor speed, dwell time, radiation field characteristics, product dimensions) is not clearly established. When the safety of the product is determined by the magnitude of the administered dose, as in radiation sterilization, waste control, or food preservation, accuracy and precision of the measurement of the effective dose are vital. Since physical dose measurements are usually simpler, more reliable and reproducible than biological testing of the product, there is a trend toward using standardized dosimetry for quality control of some processes. In many industrial products, however, such as vulcanized rubber, textiles, plastics, coatings, films, wire and cable, the effective dose can be controlled satisfactorily by controlling process variables or by product testing itself. In the measurement of radiation dose profiles by dosimetry, it is necessary to have suitable dose meter calibrations, to account for sources of error and imprecision, and to use correct statistical procedures in specifying dwell times or conveyor speeds and source and product parameters to achieve minimum and maximum doses within specifications. (author)

Medical Image Processing Server applied to Quality Control of Nuclear Medicine.

Science.gov (United States)

Vergara, C.; Graffigna, J. P.; Marino, E.; Omati, S.; Holleywell, P.

2016-04-01

This paper is framed within the area of medical image processing and aims to present the process of installation, configuration and implementation of a processing server of medical images (MIPS) in the Fundación Escuela de Medicina Nuclear located in Mendoza, Argentina (FUESMEN). It has been developed in the Gabinete de Tecnologia Médica (GA.TE.ME), Facultad de Ingeniería-Universidad Nacional de San Juan. MIPS is a software that using the DICOM standard, can receive medical imaging studies of different modalities or viewing stations, then it executes algorithms and finally returns the results to other devices. To achieve the objectives previously mentioned, preliminary tests were conducted in the laboratory. More over, tools were remotely installed in clinical enviroment. The appropiate protocols for setting up and using them in different services were established once defined those suitable algorithms. Finally, it’s important to focus on the implementation and training that is provided in FUESMEN, using nuclear medicine quality control processes. Results on implementation are exposed in this work.

Medical Image Processing Server applied to Quality Control of Nuclear Medicine

International Nuclear Information System (INIS)

Vergara, C.; Graffigna, J.P.; Holleywell, P.; Marino, E.; Omati, S.

2016-01-01

This paper is framed within the area of medical image processing and aims to present the process of installation, configuration and implementation of a processing server of medical images (MIPS) in the Fundación Escuela de Medicina Nuclear located in Mendoza, Argentina (FUESMEN). It has been developed in the Gabinete de Tecnologia Médica (GA.TE.ME), Facultad de Ingeniería-Universidad Nacional de San Juan. MIPS is a software that using the DICOM standard, can receive medical imaging studies of different modalities or viewing stations, then it executes algorithms and finally returns the results to other devices. To achieve the objectives previously mentioned, preliminary tests were conducted in the laboratory. More over, tools were remotely installed in clinical enviroment. The appropiate protocols for setting up and using them in different services were established once defined those suitable algorithms. Finally, it’s important to focus on the implementation and training that is provided in FUESMEN, using nuclear medicine quality control processes. Results on implementation are exposed in this work. (paper)

Descriptive study of the quality control in mammography; Estudio descriptivo del control de calidad en mamografia

Energy Technology Data Exchange (ETDEWEB)

Gaona, E.; Perdigon C, G.M.; Casian C, G.A.; Azorin N, J.; Diaz G, J.A.I.; Arreola, M. [UAM, Xochimilco 14000 Mexico D.F. (Mexico)

2005-07-01

The goal of mammography is to provide contrast between a lesion that is possible residing within the breast and normal surrounding tissue. Quality control is essential for maintaining the contrast imaging performance of a mammography system and incorporate tests that are relevant in that they are predictive of future degradation of contrast imaging performance. These tests will also be done at frequency that is high enough to intercept most drifts in quality imaging or performance before they become diagnostically significant. The quality control study has as objective to describe the results of the assessment of quality imaging elements (film optical density, contrast (density difference), uniformity, resolution and noise) of 62 mammography departments without quality control program and comparison these results with a mammography reference department with a quality control program. When comparing the results they allow seeing the clinical utility of to have a quality control program to reduce the errors of mammography interpretation. (Author)

40 CFR 81.110 - Camden-Sumter Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.110 Camden-Sumter Intrastate Air Quality Control Region. The Camden-Sumter Intrastate Air Quality Control Region (South Carolina) consists of the territorial area encompassed by the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Camden-Sumter Intrastate Air Quality...

40 CFR 81.52 - Wasatch Front Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.52 Wasatch Front Intrastate Air Quality Control Region. The Wasatch Front Intrastate Air Quality Control Region (Utah) consists of the territorial area encompassed by the boundaries... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Wasatch Front Intrastate Air Quality...

40 CFR 81.54 - Cook Inlet Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.54 Cook Inlet Intrastate Air Quality Control Region. The Cook Inlet Intrastate Air Quality Control Region (Alaska) consists of the territorial area encompassed by the boundaries... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Cook Inlet Intrastate Air Quality...

40 CFR 81.95 - Central Florida Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.95 Central Florida Intrastate Air Quality Control Region. The Central Florida Intrastate Air Quality Control Region consists of the territorial area encompassed by the boundaries of the... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Central Florida Intrastate Air Quality...

Quality control and quality assurance philosophy introduced in national personnel dosimetry service

International Nuclear Information System (INIS)

Trousil, J.; Zelenka, Z.; Kvasnicka, O.

2008-01-01

There in National Personnel Dosimetry Service (NPDS) the implementation of the control system to guarantee the credibility of the measured personal dose equivalents results was given on the basis of the international recommendations published by the European Commission and the IAEA and in particular of the decree of the SUJB No. 132/2008 Coll. The quality control and the quality assurance are carried out in all three personal dosimetry services introduced in NPDS: in the film badge, thermoluminescent (TL) and neutron dosimetry. (authors)

Quality control of gamma radiation measuring systems

International Nuclear Information System (INIS)

Surma, M.J.

2002-01-01

The problem of quality control and assurance of gamma radiation measuring systems has been described in detail. The factors deciding of high quality of radiometric measurements as well as statistical testing and calibration of measuring systems have been presented and discussed

40 CFR 81.80 - Las Vegas Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... Quality Control Regions § 81.80 Las Vegas Intrastate Air Quality Control Region. The Las Vegas Intrastate Air Quality Control Region (Nevada) has been revised to consist of the territorial area encompassed by... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Las Vegas Intrastate Air Quality...

Quality control for the first large areas of triple-GEM chambers for the CMS endcaps

Science.gov (United States)

Abbaneo, D.; Abbas, M.; Abbrescia, M.; Abi Akl, M.; Aboamer, O.; Acosta, D.; Ahmad, A.; Ahmed, W.; Aleksandrov, A.; Altieri, P.; Asawatangtrakuldee, C.; Aspell, P.; Assran, Y.; Awan, I.; Bally, S.; Ban, Y.; Banerjee, S.; Barashko, V.; Barria, P.; Bencze, G.; Beni, N.; Benussi, L.; Bhopatkar, V.; Bianco, S.; Bos, J.; Bouhali, O.; Braghieri, A.; Braibant, S.; Buontempo, S.; Calabria, C.; Caponero, M.; Caputo, C.; Cassese, F.; Castaneda, A.; Cauwenbergh, S.; Cavallo, F. R.; Celik, A.; Choi, M.; Choi, S.; Christiansen, J.; Cimmino, A.; Colafranceschi, S.; Colaleo, A.; Conde Garcia, A.; Czellar, S.; Dabrowski, M. M.; De Lentdecker, G.; De Oliveira, R.; de Robertis, G.; Dildick, S.; Dorney, B.; Endroczi, G.; Errico, F.; Fenyvesi, A.; Ferry, S.; Furic, I.; Giacomelli, P.; Gilmore, J.; Golovtsov, V.; Guiducci, L.; Guilloux, F.; Gutierrez, A.; Hadjiiska, R. M.; Hauser, J.; Hoepfner, K.; Hohlmann, M.; Hoorani, H.; Iaydjiev, P.; Jeng, Y. G.; Kamon, T.; Karchin, P.; Korytov, A.; Krutelyov, S.; Kumar, A.; Kim, H.; Lee, J.; Lenzi, T.; Litov, L.; Loddo, F.; Madorsky, A.; Maerschalk, T.; Maggi, M.; Magnani, A.; Mal, P. K.; Mandal, K.; Marchioro, A.; Marinov, A.; Majumdar, N.; Merlin, J. A.; Mitselmakher, G.; Mohanty, A. K.; Mohapatra, A.; Molnar, J.; Muhammad, S.; Mukhopadhyay, S.; Naimuddin, M.; Nuzzo, S.; Oliveri, E.; Pant, L. M.; Paolucci, P.; Park, I.; Passeggio, G.; Pavlov, B.; Philipps, B.; Piccolo, D.; Postema, H.; Puig Baranac, A.; Radi, A.; Radogna, R.; Raffone, G.; Ranieri, A.; Rashevski, G.; Riccardi, C.; Rodozov, M.; Rodrigues, A.; Ropelewski, L.; RoyChowdhury, S.; Ryu, G.; Ryu, M. S.; Safonov, A.; Salva, S.; Saviano, G.; Sharma, A.; Sharma, A.; Sharma, R.; Shah, A. H.; Shopova, M.; Sturdy, J.; Sultanov, G.; Swain, S. K.; Szillasi, Z.; Talvitie, J.; Tatarinov, A.; Tuuva, T.; Tytgat, M.; Vai, I.; Van Stenis, M.; Venditti, R.; Verhagen, E.; Verwilligen, P.; Vitulo, P.; Volkov, S.; Vorobyev, A.; Wang, D.; Wang, M.; Yang, U.; Yang, Y.; Yonamine, R.; Zaganidis, N.; Zenoni, F.; Zhang, A.

2018-02-01

The CMS Collaboration plans to equip the very forward muon system with triple-GEM detectors that can withstand the environment of the High-Luminosity LHC. This project is at the final stages of R&D and moving to production. An unprecedented large area of several 100 m2 are to be instrumented with GEM detectors which will be produced in six different sites around the world. A common construction and quality control procedure is required to ensure the performance of each detector. The quality control steps will include optical inspection, cleaning and baking of all materials and parts used to build the detector, leakage current tests of the GEM foils, high voltage tests, gas leak tests of the chambers and monitoring pressure drop vs. time, gain calibration to know the optimal operation region of the detector, gain uniformity tests, and studying the efficiency, noise and tracking performance of the detectors in a cosmic stand using scintillators.

Quality control for the first large areas of triple-GEM chambers for the CMS endcaps

Directory of Open Access Journals (Sweden)

Abbaneo D.

2018-01-01

Full Text Available The CMS Collaboration plans to equip the very forward muon system with triple-GEM detectors that can withstand the environment of the High-Luminosity LHC. This project is at the final stages of R&D and moving to production. An unprecedented large area of several 100 m2 are to be instrumented with GEM detectors which will be produced in six different sites around the world. A common construction and quality control procedure is required to ensure the performance of each detector. The quality control steps will include optical inspection, cleaning and baking of all materials and parts used to build the detector, leakage current tests of the GEM foils, high voltage tests, gas leak tests of the chambers and monitoring pressure drop vs. time, gain calibration to know the optimal operation region of the detector, gain uniformity tests, and studying the efficiency, noise and tracking performance of the detectors in a cosmic stand using scintillators.

Quality control for the first large areas of triple-GEM chambers for the CMS endcaps

CERN Document Server

AUTHOR|(CDS)2068936; Abbas, M.; Abbrescia, M.; Abi Akl, M.; Aboamer, O.; Acosta, D.; Ahmad, A.; Ahmed, W.; Aleksandrov, A.; Altieri, P.; Asawatangtrakuldee, C.; Aspell, P.; Assran, Y.; Awan, I.; Bally, S.; Ban, Y.; Banerjee, S.; Barashko, V.; Barria, P.; Bencze, G.; Beni, N.; Benussi, L.; Bhopatkar, V.; Bianco, S.; Bos, J.; Bouhali, O.; Braghieri, A.; Braibant, S.; Buontempo, S.; Calabria, C.; Caponero, M.; Caputo, C.; Cassese, F.; Castaneda, A.; Cauwenbergh, S.; Cavallo, F.R.; Celik, A.; Choi, M.; Choi, S.; Christiansen, J.; Cimmino, A.; Colafranceschi, S.; Colaleo, A.; Conde Garcia, A.; Czellar, S.; Dabrowski, M.M.; De Lentdecker, G.; De Oliveira, R.; de Robertis, G.; Dildick, S.; Dorney, B.; Endroczi, G.; Errico, F.; Fenyvesi, A.; Ferry, S.; Furic, I.; Giacomelli, P.; Gilmore, J.; Golovtsov, V.; Guiducci, L.; Guilloux, F.; Gutierrez, A.; Hadjiiska, R.M.; Hauser, J.; Hoepfner, K.; Hohlmann, M.; Hoorani, H.; Iaydjiev, P.; Jeng, Y.G.; Kamon, T.; Karchin, P.; Korytov, A.; Krutelyov, S.; Kumar, A.; Kim, H.; Lee, J.; Lenzi, T.; Litov, L.; Loddo, F.; Madorsky, A.; Maerschalk, T.; Maggi, M.; Magnani, A.; Mal, P.K.; Mandal, K.; Marchioro, A.; Marinov, A.; Majumdar, N.; Merlin, J.A.; Mitselmakher, G.; Mohanty, A.K.; Mohapatra, A.; Molnar, J.; Muhammad, S.; Mukhopadhyay, S.; Naimuddin, M.; Nuzzo, S.; Oliveri, E.; Pant, L.M.; Paolucci, P.; Park, I.; Passeggio, G.; Pavlov, B.; Philipps, B.; Piccolo, D.; Postema, H.; Puig Baranac, A.; Radi, A.; Radogna, R.; Raffone, G.; Ranieri, A.; Rashevski, G.; Riccardi, C.; Rodozov, M.; Rodrigues, A.; Ropelewski, L.; RoyChowdhury, S.; Ryu, G.; Ryu, M.S.; Safonov, A.; Salva, S.; Saviano, G.; Sharma, A.; Sharma, A.; Sharma, R.; Shah, A.H.; Shopova, M.; Sturdy, J.; Sultanov, G.; Swain, S.K.; Szillasi, Z.; Talvitie, J.; Tatarinov, A.; Tuuva, T.; Vai, I.; Van Stenis, M.; Venditti, R.; Verhagen, E.; Verwilligen, P.; Vitulo, P.; Volkov, S.; Vorobyev, A.; Wang, D.; Wang, M.; Yang, U.; Yang, Y.; Yonamine, R.; Zaganidis, N.; Zenoni, F.; Zhang, A.

2015-01-01

The CMS Collaboration plans to equip the very forward muon system with triple-GEM detectors that can withstand the environment of the High-Luminosity LHC. This project is at the final stages of R&D and moving to production. An unprecedented large area of several 100 m2 are to be instrumented with GEM detectors which will be produced in six different sites around the world. A common construction and quality control procedure is required to ensure the performance of each detector. The quality control steps will include optical inspection, cleaning and baking of all materials and parts used to build the detector, leakage current tests of the GEM foils, high voltage tests, gas leak tests of the chambers and monitoring pressure drop vs. time, gain calibration to know the optimal operation region of the detector, gain uniformity tests, and studying the efficiency, noise and tracking performance of the detectors in a cosmic stand using scintillators.

77 FR 21527 - Certain Cut-to-Length Carbon-Quality Steel Plate Products From the Republic of Korea: Final...

Science.gov (United States)

2012-04-10

... from the Republic of Korea. The review covers one manufacturer/ exporter. The period of review is...-Quality Steel Plate Products From the Republic of Korea: Final Results of Antidumping Duty Administrative... duty order on certain cut-to-length carbon-quality steel plate products (CTL plate) from the Republic...

Quality assurance and quality control in mammography: A review

International Nuclear Information System (INIS)

BenComo, Jose A.

2000-01-01

A mammogram is among the most technically demanding radiographic procedures. The early detection of breast cancer relies on the radiologist's ability to perceive subtle changes in the image that are only perceptible with high-quality imaging. Early detection of breast cancer is only as reliable as the mammogram with which a diagnosis is made, and a mammogram is only as accurate as the system that produces it. A quality assurance (QA) program maximizes the likelihood that the mammographic images will provide adequate diagnostic information for the least possible radiation exposure and cost to the patient. The QA program monitors each phase of operation of the imaging facility beginning with the request for an examination and ending with the interpretation of the referring physician and ensures that the imaging equipment used for the examination will yield the information desired. Because image quality is the most important technical aspect of mammography, this review summarizes the most important QA and quality control issues

Internal quality control in serological tests for syphilis.

OpenAIRE

Wasley, G D

1985-01-01

The importance of syphilis serological tests demands that laboratory reports are reliable. Internal quality control applied to the organisation of a syphilis serology service improves laboratory bench performance and reporting. Described here are internal quality control procedures of a department that serves a genitourinary medicine clinic and conducts 70 000 tests a year to investigate for syphilis.

Quality control in public participation assessments of water quality: the OPAL Water Survey.

Science.gov (United States)

Rose, N L; Turner, S D; Goldsmith, B; Gosling, L; Davidson, T A

2016-07-22

Public participation in scientific data collection is a rapidly expanding field. In water quality surveys, the involvement of the public, usually as trained volunteers, generally includes the identification of aquatic invertebrates to a broad taxonomic level. However, quality assurance is often not addressed and remains a key concern for the acceptance of publicly-generated water quality data. The Open Air Laboratories (OPAL) Water Survey, launched in May 2010, aimed to encourage interest and participation in water science by developing a 'low-barrier-to-entry' water quality survey. During 2010, over 3000 participant-selected lakes and ponds were surveyed making this the largest public participation lake and pond survey undertaken to date in the UK. But the OPAL approach of using untrained volunteers and largely anonymous data submission exacerbates quality control concerns. A number of approaches were used in order to address data quality issues including: sensitivity analysis to determine differences due to operator, sampling effort and duration; direct comparisons of identification between participants and experienced scientists; the use of a self-assessment identification quiz; the use of multiple participant surveys to assess data variability at single sites over short periods of time; comparison of survey techniques with other measurement variables and with other metrics generally considered more accurate. These quality control approaches were then used to screen the OPAL Water Survey data to generate a more robust dataset. The OPAL Water Survey results provide a regional and national assessment of water quality as well as a first national picture of water clarity (as suspended solids concentrations). Less than 10 % of lakes and ponds surveyed were 'poor' quality while 26.8 % were in the highest water quality band. It is likely that there will always be a question mark over untrained volunteer generated data simply because quality assurance is uncertain

Introduction to Quality Control in a Compounding Pharmacy.

Science.gov (United States)

Allen, Loyd V

2016-01-01

A quality-based program is vital in every compounding pharmacy to ensure that each preparation is compounded properly and is stable for its expected duration of use. This article discusses quality control, quality assurance, continuous quality improvement, and also describes the components of an in-house (in-pharmacy) quality program, as well as the role of outside laboratories. Copyright© by International Journal of Pharmaceutical Compounding, Inc.

Quality control of fifteen probiotic products containing Saccharomyces boulardii.

Science.gov (United States)

Vanhee, L M E; Goemé, F; Nelis, H J; Coenye, T

2010-11-01

The yeast Saccharomyces boulardii is used as a probiotic for the prevention and treatment of diarrhoea. In this study, the quality of 15 probiotic products containing S. boulardii was verified. Using microsatellite typing, the identity of all Saccharomyces strains in the products was confirmed as S. boulardii. Additionally, solid-phase cytometry (SPC) and a plate method were used to enumerate S. boulardii cells. SPC was not only able to produce results more rapidly than plating (4h compared to 48h) but the cell counts obtained with SPC were significantly higher than the plate counts. Finally, we found that boulardii cells survived 120min in gastric conditions and storage for 3months at 40°C with 75% relative humidity. We developed a SPC method for the quantification of viable S. boulardii cells in probiotics. Additionally, we demonstrated that gastric conditions and storage have a marked effect on the viability of the yeast cells.   To our knowledge, this is the first time SPC is used for the quality control of probiotics with S. boulardii. Additionally, we demonstrated the need for gastric protection and accurate storage. © 2010 The Authors. Journal of Applied Microbiology © 2010 The Society for Applied Microbiology.

Enhanced Power Quality and Minimized Peak Current Control in An Inverter based Microgrid under Unbalanced Grid Faults

DEFF Research Database (Denmark)

Liu, Wenzhao; Guo, Xiaoqiang; Sulligoi, Giorgio

2016-01-01

The microgrid inverter experiences the power oscillations and current harmonics in case of the unbalanced grid voltage faults. However, there is a trade-off between power oscillations and current harmonics should be considered in three phase three wire inverter systems during the conventional fault...... ride through control. In order to solve this problem, a novel control strategy is proposed to enhance the output current quality while mitigating the active and reactive output power oscillations. Moreover, a simple current-limited control strategy can be achieved without the necessity of the voltage....../current positive/negative sequence extraction. Finally, the simulation tests of the conventional and proposed control solutions are carried out. The results verify the effectiveness of the proposed strategy....

Quality Assurance and Quality Control in TLD Measurement

International Nuclear Information System (INIS)

Bhuiyan, S.I.; Qronfla, M.M.; Abulfaraj, W.H.; Kinsara, A.A.; Taha, T.M.; Molla, N.I.; Elmohr, S.M.

2008-01-01

TLD technique characterized by high precision and reproducibility of dose measurement is presented by addressing pre-readout annealing, group sorting, dose evaluation, blind tests, internal dose quality audit and external quality control audits. Two hundred and forty TLD chips were annealed for 1 hour at 4000 degree C followed by 2 h at 1000 degree C. After exposure of 1 mGy from 90 Sr irradiator TLDs were subjected to pre-readout annealing at 1000 degree C, then readout, sorted into groups each with nearly equal sensitivity. Upon repeating the procedures, TLDs having response >3.5% from group mean were dropped to assuring group stability. Effect of pre-readout annealing has been studied. Series of repeated measurements were conducted to stabilize calibration procedures and DCF generation using SSDL level 137 Cs calibrator, dose master, ionization chambers. Performed internal dose quality audits, blind tests and validated by external QC tests with King Abdulaziz City of Science and Technology

Establishment of a radiotherapy service with a linear accelerator (photons): acceptance tests, dosimetry and quality control; Implantacao de um servico de radioterapia com acelerador linear (fotons): testes de aceitacao, dosimetria e controle de qualidade

Energy Technology Data Exchange (ETDEWEB)

Berdaky, Mafalda Feliciano

2000-07-01

This work presents the operational part of the final process of the establishment of a radiotherapy service with a linear accelerator (6 MeV photon beams), including the acceptance tests, commissioning tests and the implementation of a quality control program through routine mechanical and radiation tests. All acceptance tests were satisfactory, showing results below the allowed limits of the manufacturer, the commissioning tests presented results within those of the international recommendations. The quality control program was performed during 34 months and showed an excellent stability of this accelerator. (author)

Quality control of radioactive waste products

International Nuclear Information System (INIS)

Martens, B.R.; Warnecke, E.; Odoj, R.

1986-01-01

The variety of incoming untreated wastes, treatment methods, waste forms and containers requires a great variety of controlling methods and principles to be applied both during waste treatment and on the final product. The paper describes product control schemes and methods, sampling systems and transportable testing equipment for waste drums, and equipment for waste cementation using in-drum stirring and subsequent fixation of solid wastes in the flowable product. (DG) [de

Internal quality control indicators of cervical cytopathology exams performed in laboratories monitored by the External Quality Control Laboratory.

Science.gov (United States)

Ázara, Cinara Zago Silveira; Manrique, Edna Joana Cláudio; Tavares, Suelene Brito do Nascimento; de Souza, Nadja Lindany Alves; Amaral, Rita Goreti

2014-09-01

To evaluate the impact of continued education provided by an external quality control laboratory on the indicators of internal quality control of cytopathology exams. The internal quality assurance indicators for cytopathology exams from 12 laboratories monitored by the External Quality Control Laboratory were evaluated. Overall, 185,194 exams were included, 98,133 of which referred to the period preceding implementation of a continued education program, while 87,061 referred to the period following this intervention. Data were obtained from the Cervical Cancer Database of the Brazilian National Health Service. Following implementation of the continued education program, the positivity index (PI) remained within recommended limits in four laboratories. In another four laboratories, the PI progressed from below the limits to within the recommended standards. In one laboratory, the PI remained low, in two laboratories, it remained very low, and in one, it increased from very low to low. The percentage of exams compatible with a high-grade squamous intraepithelial lesion (HSIL) remained within the recommended limits in five laboratories, while in three laboratories it progressed from below the recommended levels to >0.4% of the total number of satisfactory exams, and in four laboratories it remained below the standard limit. Both the percentage of atypical squamous cells of undetermined significance (ASC-US) in relation to abnormal exams, and the ratio between ASC-US and intraepithelial lesions remained within recommended levels in all the laboratories investigated. An improvement was found in the indicators represented by the positivity index and the percentage of exams compatible with a high-grade squamous intraepithelial lesion, showing that the role played by the external quality control laboratory in providing continued education contributed towards improving laboratory staff skills in detecting cervical cancer precursor lesions.

Development of the gaharu oil quality control

International Nuclear Information System (INIS)

Chong Saw Peng; Mohd Fajri Osman; Shyful Azizi Abdul Rahman; Khairuddin Abdul Rahim; Mat Rasol Awang

2010-01-01

Gaharu (Agar wood) is a secondary metabolite produces by the Aquilaria spp. and accumulates in the plant cell in oleoresin form. The essential oil known as gaharu oil can be extracted from this oleoresin gaharu via varies extraction method such as the water distillation, solvent extraction, pressurize extraction and etc. The gaharu oil extracted through different methods will give different fragrances. Besides, different source of materials will also give different in chemical profiles. In gaharu oil trading market, most of the buyers request quality assurance from the gaharu oil manufacturer to assure the gaharu oil purchased meets their standard requirement. Since there is a demand on gaharu oil quality assurance then it become a need to develop the gaharu oil quality control method in order to have a standard quality control of gaharu oil presented in a certificate of analysis and verified by laboratory. (author)

Quality assurance during site construction

International Nuclear Information System (INIS)

Eymess, K.J.; Haas, R.; Wellnitz, G.

1980-01-01

Quality Assurance for Nuclear Power Plants under consideration of pipe assembling. Flow of Quality Requirements during: - Desing - Construction - Procurement - Prefabrication - Site. Organizational Requirements and Measurements during Erection: - Incoming Control - Material Storage - Surveillance of Tools - Weld Surveillance - Nondestructive Testing - Cleaning - Final Documentation. Qualification and Training of QA Personnel. (orig.)

Quality control for exposure assessment in epidemiological studies

DEFF Research Database (Denmark)

Bornkessel, C; Blettner, M; Breckenkamp, J

2010-01-01

In the framework of an epidemiological study, dosemeters were used for the assessment of radio frequency electromagnetic field exposure. To check the correct dosemeter's performance in terms of consistency of recorded field values over the entire study period, a quality control strategy...... was developed. In this paper, the concept of quality control and its results is described. From the 20 dosemeters used, 19 were very stable and reproducible, with deviations of a maximum of +/-1 dB compared with their initial state. One device was found to be faulty and its measurement data had to be excluded...... from the analysis. As a result of continuous quality control procedures, the confidence in the measurements obtained during the field work was strengthened significantly....

Quality Control and Quality Assurance of Radiation Oncology

International Nuclear Information System (INIS)

Abaza, A.

2016-01-01

Radiotherapy (RT) has played important roles in cancer treatment for more than one century. The development of RT techniques allows high-dose irradiation to tumors while reducing the radiation doses delivered to surrounding normal tissues. However, RT is a complex process and involves understanding of the principles of medical physics, radiobiology, radiation safety, dosimetry, radiation treatment planning, simulation and interaction of radiation with other treatment modalities. Each step in the integrated process of RT needs quality control and quality assurance (QA) to prevent errors and to ensure that patients will receive the prescribed treatment correctly. The aim of this study is to help the radio therapists in identifying a system for QA that balances patient safety and quality with available resources. Recent advances in RT focus on the need for a systematic RT QA program that balances patient safety and quality with available resources. It is necessary to develop more formal error mitigation and process analysis methods, such as failure mode and effect analysis (FMEA), to focus available QA resources optimally on the process components. External audit programs are also effective. Additionally, Clinical trial QA has a significant role in enhancing the quality of care. The International Atomic Energy Agency (IAEA) has operated both an on-site and off-site postal dosimetry audit to improve practice and to assure the dose from RT equipment. Both postal dosimetry audit and clinical trial RTQA, especially for advanced technologies, in collaboration with global networks, will serve to enhance patient safety and quality of care

Quality control of nuclear medicine instruments, 1991

International Nuclear Information System (INIS)

1996-12-01

This document gives detailed guidance on the quality control of various instruments used in nuclear medicine. A first preliminary document was drawn up in 1979. A revised and extended version, incorporating recommended procedures, test schedules and protocols was prepared in 1982. The first edition of 'Quality Control of Nuclear Medicine Instruments', IAEA-TECDOC-317, was printed in late 1984. Recent advances in the field of nuclear medicine imaging made it necessary to add a chapter on Camera-Computer Systems and another on SPECT Systems

A quality control program for radiation sources

International Nuclear Information System (INIS)

Almeida, C.E. de; Sibata, C.H.; Cecatti, E.R.; Kawakami, N.S.; Alexandre, A.C.; Chiavegatti Junior, M.

1982-01-01

An extensive quality control program was established covering the following areas: physical parameters of the therapeutical machines, dosimetric standards, preventive maintenance of radiation sources and measuring instruments. A critical evaluation of this program was done after two years (1977-1979) of routine application and the results will be presented. The fluctuation on physical parameters strongly supports the efforts and cost of a quality control program. This program has certainly improved the accuracy required on the delivery of the prescribed dose for radiotherapy treatment. (Author) [pt

Quality control of nuclear medicine instruments 1991

International Nuclear Information System (INIS)

1991-05-01

This document gives detailed guidance on the quality control of various instruments used in nuclear medicine. A first preliminary document was drawn up in 1979. A revised and extended version, incorporating recommended procedures, test schedules and protocols was prepared in 1982. The first edition of ''Quality Control of Nuclear Medicine Instruments'', IAEA-TECDOC-317, was printed in late 1984. Recent advances in the field of nuclear medicine imaging made it necessary to add a chapter on Camera-Computer Systems and another on SPECT Systems. Figs and tabs

Physical aspects of quality assurance in radiotherapy: A protocol for quality control

International Nuclear Information System (INIS)

Aguirre, J.F.; Alfonso-Laguardia, R.; Andreo, P.; Brunetto, M.; Marenco-Zuniga, H.; Gutt, F.; Torres-Calderon, A.

2000-06-01

In consistency with the increasing requests from Member States for establishing radiotherapy programmes, an IAEA Technical Co-operation project was initiated in Latin America aimed at improving the physical aspects (as a complement to the clinical issues) of quality assurance in radiotherapy; this ARCAL XXX project (RLA/6/032) was classified as a Model Project of the IAEA. Among the important outcomes of the project were (i) the training of a considerable number of medical physicists in hospitals of the region, (ii) the development of a protocol for quality control procedures, and (iii) the organization of quality audit site visits (to the participant countries) where the implementation in hospitals of the developed quality control procedures is verified. The present publication is the protocol for quality control of the physical aspects of radiotherapy. It contains detailed procedures on what should be measured by a medical physicist in a radiotherapy treatment unit and related equipment, and how this should be made. The latter is made through several appendices, which make the document rather unique. The protocol was developed by medical physicists of the region for the professionals of the region, and it is the first document of this kind ever written in Spanish. A training course was organized in November 1998 (Havana, Cuba) where its practical implementation was taught. There are plans to have this document translated into different languages for the various regions having similar TC projects. (author)

Navy radon assessment and mitigation program: Final report

International Nuclear Information System (INIS)

1994-10-01

This final report encompasses the events from the beginning of the Navy Radon Assessment and Mitigation Program to the closure of the program on October 31, 1994. Included in the report are discussions of the phases of the program including screening, assessment, mitigation, and post-mitigation. The primary discussion involves screening and assessment. The report addresses recommendations made to the Naval Facilities Engineering Command by the Hazardous Waste Remedial Actions Program of Martin Marietta Energy Systems, Inc., and the final decisions that were made. Special emphasis is placed on quality assurance/quality control (QA/QC), since QA/QC was given top priority during the implementation of this program. Included in the discussion on QA/QC are ana overview of the measurement process, positive and negative controls, replicated measurements, and application of chamber exposures to data calibration. The report concludes with a discussion of testing considerations for naval facilities and radon mitigation considerations for the Department of the Navy

Testing objects in Computerized Axial Tomography. Contributions to the Spanish Protocol on quality control in radiodiagnostics

International Nuclear Information System (INIS)

Villaescusa, J.I.; Campayo, J.M.

1995-01-01

In the provisional version of the Spanish Protocol about the technical aspects of Quality Control in Radiodiagnostic,SEFM-SEPR 1993, it is dedicated a section to Computerized Axial tomography, establishing a total of eleven technical parameters of the equipment for examination. The present work describes the practical use of the Protocol using various types of Test Object. The authors also propose new tests that should be considered in the final version of the Spanish Protocol. (Author)

Quality control of Ling'ao nuclear power station civil construction

International Nuclear Information System (INIS)

Lu Buliang; Ye Changyuan

2001-01-01

Based on the quality control model adopted during Ling'ao Nuclear Power Station construction, the author briefly introduces quality control process of some main civil construction activities (reinforced concrete, steel liner, steel works and prestressing force) of nuclear power station, and makes some descriptions on non-conformance control of civil works. These quality control processes described come from the concrete practice during civil construction of Ling'ao Nuclear Power Station, and are based on Daya Bay Nuclear Power Station construction experience

Current quality assurance concepts and considerations for quality control of in-clinic biochemistry testing.

Science.gov (United States)

Lester, Sally; Harr, K E; Rishniw, Mark; Pion, Paul

2013-01-15

Quality assurance is an implied concept inherent in every consumer's purchase of a product or service. In laboratory testing, quality assurance encompasses preanalytic (sampling, transport, and handling prior to testing), analytic (measurement), and postanalytic (reporting and interpretation) factors. Quality-assurance programs require that procedures are in place to detect errors in all 3 components and that the procedures are characterized by both documentation and correction of errors. There are regulatory bodies that provide mandatory standards for and regulation of human medical laboratories. No such regulations exist for veterinary laboratory testing. The American Society for Veterinary Clinical Pathology (ASVCP) Quality Assurance and Laboratory Standards Committee was formed in 1996 in response to concerns of ASVCP members about quality assurance and quality control in laboratories performing veterinary testing. Guidelines for veterinary laboratory testing have been developed by the ASVCP. The purpose of this report was to provide an overview of selected quality-assurance concepts and to provide recommendations for quality control for in-clinic biochemistry testing in general veterinary practice.

Housing tenancy,data management and quality control

NARCIS (Netherlands)

Smeets, J.J.A.M.; Timmermans, H.J.P.

1993-01-01

This paper deal s with housing tenancy, data management and quality control. The proposed method is focused on quality characteristics of housing estates in view of rentability risks. It entails a cycle of registration, analysis and implementation of measures. The starting point is the behaviour of

Quality Assurance and Quality Control in Point-of-Care Testing.

Science.gov (United States)

Newman, Ashleigh W; Behling-Kelly, Erica

2016-03-01

With advancements in the standard of care in veterinary medicine and instrument technology, performing in-house laboratory work on a variety of point-of-care instruments, ranging from glucometers to benchtop chemistry analyzers, has become increasingly commonplace. However, the ability of an instrument to perform a test does not guarantee that those results are accurate. Ensuring that your in-clinic laboratory is providing reliable data requires a comprehensive plan that encompasses both common sense practices aimed at preventing errors at each stage of the testing process, as well as standard operating procedures to validate and monitor analyzer performance. These 2 arms of the plan are known as quality assurance and quality control. Although these concepts are typically out of the comfort zone for veterinarians, just as the thought of business management may deter some veterinarians from practice ownership, it is not beyond the capabilities of veterinarians to learn, understand, and incorporate them into their practice. The objectives of this article are to convey the importance of quality assurance and quality control, walk you through the American Society for Veterinary Clinical Pathology guidelines on this topic, and provide direction to additional resources for further education on this topic, all with the focus on point-of-care testing in the in-clinic laboratory. Copyright © 2016 Elsevier Inc. All rights reserved.

Quality assurance/quality control summary report on phase 2 of the Clinch River remedial investigation at the Oak Ridge Reservation, Oak Ridge, Tennessee

Energy Technology Data Exchange (ETDEWEB)

Holladay, S.K.; Anderson, H.M.; Benson, S.B.; Bevelhimer, M.S.; Brandt, C.C.; Chavannes, C.M.; Cook, R.B.; Evans, D.A.; Ford, C.J.; Harris, R.A.; Horwedel, B.M.; Jackson, B.L.

1996-12-01

Quality assurance (QA) objectives for Phase 2 were that (1) scientific data generated would withstand scientific and legal scrutiny; (2) data would be gathered using appropriate procedures for sample collection, sample handling and security, chain of custody, laboratory analyses, and data reporting; (3) data would be of known precision and accuracy; and (4) data would meet data quality objectives defined in the Phase 2 Sampling and Analysis Plan. A review of the QA systems and quality control (QC) data associated with the Phase 2 investigation is presented to evaluate whether the data were of sufficient quality to satisfy Phase 2 objectives. The data quality indicators of precision, accuracy, representativeness, comparability, completeness, and sensitivity were evaluated to determine any limitations associated with the data. Data were flagged with qualifiers that were associated with appropriate reason codes and documentation relating the qualifiers to the reviewer of the data. These qualifiers were then consolidated into an overall final qualifier to represent the quality of the data to the end user. In summary, reproducible, precise, and accurate measurements consistent with CRRI objectives and the limitations of the sampling and analytical procedures used were obtained for the data collected in support of the Phase 2 Remedial Investigation.

Quality assurance/quality control summary report on phase 2 of the Clinch River remedial investigation at the Oak Ridge Reservation, Oak Ridge, Tennessee

International Nuclear Information System (INIS)

Holladay, S.K.; Anderson, H.M.; Benson, S.B.; Bevelhimer, M.S.; Brandt, C.C.; Chavannes, C.M.; Cook, R.B.; Evans, D.A.; Ford, C.J.; Harris, R.A.; Horwedel, B.M.; Jackson, B.L.

1996-12-01

Quality assurance (QA) objectives for Phase 2 were that (1) scientific data generated would withstand scientific and legal scrutiny; (2) data would be gathered using appropriate procedures for sample collection, sample handling and security, chain of custody, laboratory analyses, and data reporting; (3) data would be of known precision and accuracy; and (4) data would meet data quality objectives defined in the Phase 2 Sampling and Analysis Plan. A review of the QA systems and quality control (QC) data associated with the Phase 2 investigation is presented to evaluate whether the data were of sufficient quality to satisfy Phase 2 objectives. The data quality indicators of precision, accuracy, representativeness, comparability, completeness, and sensitivity were evaluated to determine any limitations associated with the data. Data were flagged with qualifiers that were associated with appropriate reason codes and documentation relating the qualifiers to the reviewer of the data. These qualifiers were then consolidated into an overall final qualifier to represent the quality of the data to the end user. In summary, reproducible, precise, and accurate measurements consistent with CRRI objectives and the limitations of the sampling and analytical procedures used were obtained for the data collected in support of the Phase 2 Remedial Investigation

Title IV Quality Control Project, Stage II. Management Option II: Delivery System Quality Improvements.

Science.gov (United States)

Advanced Technology, Inc., Reston, VA.

Stage Two of the Title IV Quality Control Project is an integrated study of quality in five related Federal financial aid programs for postsecondary students. Section 1 of the paper establishes a framework for defining quality improvements, in order to identify the types of changes that would tend to improve quality across all facets of the…

40 CFR 62.7856 - Albuquerque/Bernalillo County Air Quality Control Board.

Science.gov (United States)

2010-07-01

... Quality Control Board. 62.7856 Section 62.7856 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... Albuquerque/Bernalillo County Air Quality Control Board. (a) Identification of Plan. Albuquerque-Bernalillo... County Air Quality Control Board on November 9, 2005. (b) Identification of Sources. The plan applies to...

40 CFR 81.62 - Northeast Mississippi Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Northeast Mississippi Intrastate Air... Air Quality Control Regions § 81.62 Northeast Mississippi Intrastate Air Quality Control Region. The Alabama-Mississippi-Tennessee Interstate Air Quality Control Region has been renamed the Northeast...

40 CFR 81.216 - Northeast Indiana Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Northeast Indiana Intrastate Air... Air Quality Control Regions § 81.216 Northeast Indiana Intrastate Air Quality Control Region. The Northeast Indiana Intrastate Air Quality Control Region (Indiana) consists of the territorial area...

40 CFR 81.162 - Northeast Plateau Intrastate Air Quality Control Region.

Science.gov (United States)

2010-07-01

... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Northeast Plateau Intrastate Air... Air Quality Control Regions § 81.162 Northeast Plateau Intrastate Air Quality Control Region. The Northeast Plateau Intrastate Air Quality Control Region (California) consists of the territorial area...

The process of managerial control in quality improvement initiatives.

Science.gov (United States)

Slovensky, D J; Fottler, M D

1994-11-01

The fundamental intent of strategic management is to position an organization with in its market to exploit organizational competencies and strengths to gain competitive advantage. Competitive advantage may be achieved through such strategies as low cost, high quality, or unique services or products. For health care organizations accredited by the Joint Commission on Accreditation of Healthcare Organizations, continually improving both processes and outcomes of organizational performance--quality improvement--in all operational areas of the organization is a mandated strategy. Defining and measuring quality and controlling the quality improvement strategy remain problematic. The article discusses the nature and processes of managerial control, some potential measures of quality, and related information needs.

standards used for quality control of nuclear fuels

International Nuclear Information System (INIS)

Guereli, L; Can, S.

1997-01-01

Nuclear fuels and fuel materials are subject to stringent restrictions as to their quality. The standards and regulations that apply vary according to reactor type and country and the standards are stated in the quality assurance documents. The concept of quality assurance has altered the conventional quality control tests and procedures, defining which control tests are to be applied and how. Although most of the tests and measurements allow the determination of tolerances to be decided according to the agreement between the buyer and the seller, exacting procedures apply to which instruments and equipment are used for these tests and measurements, how these instruments are standardized.Detailed explanations of test methods and their documentation is a requirement in all standards. The purpose of this work is to study which standards, tests and measurements apply to the nuclear fuel production. Only the standards that apply to various stages of the nuclear fuel production (powder preparation, pellet production, fuel element and fuel assembly fabrication) are reviewed. Process and documentation control, design and licensing requirements and the frequency of inspections are quality assurance subjects. Some ASTM standards are given as examples

Statistical quality control a loss minimization approach

CERN Document Server

Trietsch, Dan

1999-01-01

While many books on quality espouse the Taguchi loss function, they do not examine its impact on statistical quality control (SQC). But using the Taguchi loss function sheds new light on questions relating to SQC and calls for some changes. This book covers SQC in a way that conforms with the need to minimize loss. Subjects often not covered elsewhere include: (i) measurements, (ii) determining how many points to sample to obtain reliable control charts (for which purpose a new graphic tool, diffidence charts, is introduced), (iii) the connection between process capability and tolerances, (iv)

Net analyte signal based statistical quality control

NARCIS (Netherlands)

Skibsted, E.T.S.; Boelens, H.F.M.; Westerhuis, J.A.; Smilde, A.K.; Broad, N.W.; Rees, D.R.; Witte, D.T.

2005-01-01

Net analyte signal statistical quality control (NAS-SQC) is a new methodology to perform multivariate product quality monitoring based on the net analyte signal approach. The main advantage of NAS-SQC is that the systematic variation in the product due to the analyte (or property) of interest is

Safety of timber : An analysis of quality control options

NARCIS (Netherlands)

Kovryga, A.; Stapel, P.; Van de Kuilen, J.W.G.

2014-01-01

The quality assurance of timber properties is important for the safety of timber structures. In the current study, the quality control options of timber are analysed under the prism of the different growth regions. Therefore, these options - machine and output control - are simulated in accordance