Search results for: Zsolt Varga

Items from 1 to 20 out of 52 results

article

Certification of Uranium Isotope Amount Ratios in a Suite of Uranium Ore Concentrate Certified Reference Materials

Ruoxi Zhang, Kenny Nadeau, Eduardo Amilcar Gautier, Paola Alejandra Babay, more

Geostandards and Geoanalytical Research > 46 > 1 > 43 - 56

In this study, data from thirteen laboratories from around the world are presented for a successful certification of uranium isotope ratios in uranium ore concentrate (UOC) certified reference materials from the National Research Council Canada. Different mass spectrometric measurement principles (including SF‐ICP‐MS, quadruple ICP‐MS, TIMS, MC‐ICP‐MS, SIMS and AMS) and measurement procedures were...

article

Significance of preoperative blood tests in the prognosis of colorectal cancer: A prospective, multicenter study from Hungary

Adrienn Biró, Péter Kolozsi, Attila Nagy, Zsolt Varga, more

Journal of Clinical Laboratory Analysis > 36 > 1 > n/a - n/a

Background The focus of this study was to analyze the prognostic value of different combinations of inflammatory and coagulation factors using preoperative blood and to appraise the clinical importance of these biomarkers in colorectal cancer patients. Methods A prospective, multicenter study included patients undergoing radical colorectal surgery in three county hospitals. Inflammatory and coagulation...

article

Measurement of production date (age) of nanogram amount of uranium

Zsolt Varga, Maria Wallenius, Adrian Nicholl, Klaus Mayer, more

Journal of Radioanalytical and Nuclear Chemistry > 2019 > 322 > 3 > 1585-1591

JRC-Karlsruhe obtained a swipe sample from a highly enriched uranium seizure, which had taken place in 2011. Due to the very low amount of uranium (nanograms) a new method needed to be developed to determine the U production date (age). The particles on the swipe were collected on a pyrolytic graphite planchet using a vacuum impactor and they were subsequently leached with ccHNO₃. The “bulk” U isotopic...

article

Measurement of the ²³¹Pa/²³⁵U ratio for the age determination of uranium materials

Zsolt Varga, Adrian Nicholl, Erich Hrnecek, Maria Wallenius, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 318 > 3 > 1565-1571

The paper describes the age (production date) determination of uranium reference materials using the ²³¹Pa/²³⁵U ratio. Direct addition of ²³⁷Np in secular equilibrium with its ²³³Pa daughter was chosen instead of the regular milking of ²³⁷Np to avoid possible loss of Pa. Sample preparation consists of a fast, one-step procedure. The developed method using ICP-MS for the measurement of ²³¹Pa is more...

article

The application of radiochronometry during the 4th collaborative materials exercise of the nuclear forensics international technical working group (ITWG)

Michael J. Kristo, Ross Williams, Amy M. Gaffney, Theresa M. Kayzar-Boggs, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 425-434

In a recent international exercise, 10 international nuclear forensics laboratories successfully performed radiochronometry on three low enriched uranium oxide samples, providing 12 analytical results using three different parent-daughter pairs serving as independent chronometers. The vast majority of the results were consistent with one another and consistent with the known processing history of...

article

Short- and Long-Term (10-year) Results of an Organized, Population-Based Breast Cancer Screening Program: Comparative, Observational Study from Hungary

Dezső Tóth, Zsolt Varga, Judit Tóth, Péter Árkosy, more

World Journal of Surgery > 2018 > 42 > 5 > 1396-1402

Background A nationwide breast cancer screening program was introduced in Hungary in the year 2002 for women aged 45–65 years to be performed biannually. Methods To investigate and report the short-term and 10-year follow-up results, we analyzed our Breast Unit’s prospectively led database of screened (Group A) and age-matched symptomatic (Group B) patients from 2002 to 2007. We compared the clinicopathologic...

article

Uranium assay and trace element analysis of the fourth collaborative material exercise samples by the modified Davies-Gray method and the ICP-MS/OES techniques

Aubrey N. Nelwamondo, Lisa P. Colletti, Rachel E. Lindvall, Anna Vesterlund, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 379-394

An international group of laboratories participating in CMX-4 subjected three samples to comparative nuclear forensic analysis using uranium assay and trace element analysis techniques to determine if the samples had similar or different origins. Uranium assay indicated that two pellet samples (ES-2 and ES-3) were nearly pure UO₂ while the black powder sample ES-1 was primarily UO₂ with UO₃ and/or...

article

Identification of uranium signatures relevant for nuclear safeguards and forensics

Zsolt Varga, Judit Krajkó, Maxim Peńkin, Márton Novák, more

Journal of Radioanalytical and Nuclear Chemistry > 2017 > 312 > 3 > 639-654

The paper describes the applicability of different characteristics (signatures) in nuclear safeguards and forensics for assessment of uranium material provenance in terms of production process. The study follows a uranium ore concentrate production from an ore to a U₃O₈ product. It turned out that rare-earth elemental pattern, radiochronometry (age of ore body and material production date), sulphur...

chapter

An Agent Based Approach for Migrating Web Services to Semantic Web Services

László Zsolt Varga, Ákos Hajnal, Zsolt Werner

Lecture Notes in Computer Science > Artificial Intelligence: Methodology, Systems, and Applications > Multi-agent Systems > 371-380

Semantic web services are considered as the concept bringing the web to its full potential by combining the best features of web services, agent technology, grid and the semantic web. In this paper we present an agent based architecture for migrating existing web services to the semantic web service environment. We developed the WSDL2Agent tool to support the migration. The tool automatically generates...

chapter

Knowledge Driven Architecture for Home Care

Ákos Hajnal, David Isern, Antonio Moreno, Gianfranco Pedone, more

Lecture Notes in Computer Science > Multi-Agent Systems and Applications V > Full Papers > 173-182

Multi-Agent Systems (MAS) in health-care domains are showing a rapid increase, in order to manage complex tasks and adapt gracefully to unexpected events. On the other hand, the lack of well-established agent-oriented engineering methodologies to transform knowledge level descriptions into deployable agent systems slackens MAS development. This paper presents a new methodology in modelling and automatically...

chapter

The WSDL2Agent Tool

László Zsolt Varga, Ákos Hajnal, Zsolt Werner

Whitestein Series in Software Agent Technologies and Autonomic Computing > Software Agent-Based Applications, Platforms and Development Kits > 197-222

The WSDL2Agent tool is used to help the integration of existing web services into agent based systems. The input to the WSDL2Agent tool is the WSDL file of a web service and the tool provides two types of output. The WSDL2Jade part of the tool generates code for a proxy agent that makes the web service available in multi-agent environment. The WSDL2Protégé part of the tool generates project file for...

chapter

Engineering Web Service Invocations from Agent Systems

László Zsolt Varga, Ákos Hajnal

Lecture Notes in Computer Science > Multi-Agent Systems and Applications III > Web & Mobile Agents > 626-635

This paper presents a methodology that helps to bridge the gap between the theoretical foundations of agent technologies and their potential for industry-wide deployment. Agent systems are very often developed on top of a legacy system where agents have to be able to access the legacy system, usually web services, through a non-agent protocol and they have to be able to communicate with each other...

book

Multi-Agent Systems and Applications IV

Michael Pěchouček, Paolo Petta, László Zsolt Varga

Lecture Notes in Computer Science

The aim of the CEEMAS conference series is to provide a biennial forum for the presentation of multi-agent research and development results. With its p- ticular geographicalorientation towards Central and Eastern Europe, CEEMAS has become an internationally recognised event with participants from all over the world. After the successful CEEMAS conferences in St. Petersburg (1999), Cracow (2001) and...

book

Multi-Agent Systems and Applications V

Hans-Dieter Burkhard, Gabriela Lindemann, Rineke Verbrugge, László Zsolt Varga

Lecture Notes in Computer Science

The aim of the CEEMAS conference series is to provide a biennial forum for the presentation of multi-agent research and development results. With its p- ticular geographicalorientationtowards Central and EasternEurope, CEEMAS has become an internationally recognized event with participants from all over the world. After the successful CEEMAS conferences in St. Petersburg (1999), Cracow (2001), Prague...

article

Traumatic retinal detachment—the difficulty and importance of correct diagnosis

Florence Hoogewoud, Argyrios Chronopoulos, Zsolt Varga, Georges Souteyrand, more

Survey of Ophthalmology > 2016 > 61 > 2 > 156-163

Accurate characterization of a retinal detachment as traumatic is often difficult, but is important because it may instigate a careful search for occult coexistent traumatic pathology, affect the prognosis and the treatment of both eyes, influence insurance coverage benefits and medical-legal determinations, and is essential for epidemiologic studies. We review the epidemiology and pathophysiology...

article

Predictive Factors for Positive Margin and the Surgical Learning Curve in Non-Palpable Breast Cancer After Wire-Guided Localization – Prospective Study of 214 Consecutive Patients

Dezső Tóth, Zsolt Varga, Éva Sebő, Miklós Török, more

Pathology & Oncology Research > 2016 > 22 > 1 > 209-215

To investigate the most commonly used technique, the wire-guided localization (WGL) in non-palpable breast cancer. To analyze the effective factors on positive surgical margins in our practice and determine the surgical learning curve of this method. Prospective consecutive study was performed from January 2005 to December 2011. Inclusion criteria was a non-palpable breast lesion with malignancy on...

article

Investigation of sulphur isotope variation due to different processes applied during uranium ore concentrate production

Judit Krajkó, Zsolt Varga, Maria Wallenius, Klaus Mayer, more

Journal of Radioanalytical and Nuclear Chemistry > 2016 > 309 > 3 > 1113-1121

The applicability and limitations of sulphur isotope ratio as a nuclear forensic signature have been studied. The typically applied leaching methods in uranium mining processes were simulated for five uranium ore samples and the n(³⁴S)/n(³²S) ratios were measured. The sulphur isotope ratio variation during uranium ore concentrate (UOC) production was also followed using two real-life sample sets obtained...

article

IRMM-1000a and IRMM-1000b uranium reference materials certified for the production date. Part I: methodology, preparation and target characteristics

Zsolt Varga, Célia Venchiarutti, Adrian Nicholl, Judit Krajkó, more

Journal of Radioanalytical and Nuclear Chemistry > 2016 > 307 > 2 > 1077-1085

The paper describes the preparation and production of the reference materials, IRMM-1000a and IRMM-1000b, certified for the production date based on the ²³⁰Th/²³⁴U radiochronometer in compliance with ISO Guide 34:2009. The production date of the reference materials corresponds to the last separation of ²³⁰Th from ²³⁴U, i.e. when the initial daughter nuclide content in the material was finally removed...

article

Plutonium age dating (production date measurement) by inductively coupled plasma mass spectrometry

Zsolt Varga, Adrian Nicholl, Maria Wallenius, Klaus Mayer

Journal of Radioanalytical and Nuclear Chemistry > 2016 > 307 > 3 > 1919-1926

This paper describes rapid methods for the determination of the production date (age dating) of plutonium (Pu) materials by inductively coupled plasma mass spectrometry (ICP-MS) for nuclear forensic and safeguards purposes. One of the presented methods is a rapid, direct measurement without chemical separation using ²³⁵U/²³⁹Pu and ²³⁶U/²⁴⁰Pu chronometers. The other method comprises a straightforward...

article

Titelbild: Uran aus deutschen Nuklearprojekten der 1940er Jahre – eine nuklearforensische Untersuchung (Angew. Chem. 45/2015)

Klaus Mayer, Maria Wallenius, Klaus Lützenkirchen, Joan Horta, more

Angewandte Chemie > 127 > 45 > 13331 - 13331

Nuklearforensik verfolgt die Spur zweier Uranblöcke zu den ersten deutschen Kernreaktionsexperimenten in den 1940er Jahren zurück. In der Zuschrift auf S. 13654 ff. vergleichen M. Wallenius et al. die makroskopischen Eigenschaften der Proben mit Literaturangaben, und sie bestimmen den Herstellungszeitpunkt und die Uranquelle.

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INFONA - science communication portal

Search results for: Zsolt Varga

Certification of Uranium Isotope Amount Ratios in a Suite of Uranium Ore Concentrate Certified Reference Materials

Significance of preoperative blood tests in the prognosis of colorectal cancer: A prospective, multicenter study from Hungary

Measurement of production date (age) of nanogram amount of uranium

Measurement of the ²³¹Pa/²³⁵U ratio for the age determination of uranium materials

The application of radiochronometry during the 4th collaborative materials exercise of the nuclear forensics international technical working group (ITWG)

Short- and Long-Term (10-year) Results of an Organized, Population-Based Breast Cancer Screening Program: Comparative, Observational Study from Hungary

Uranium assay and trace element analysis of the fourth collaborative material exercise samples by the modified Davies-Gray method and the ICP-MS/OES techniques

Identification of uranium signatures relevant for nuclear safeguards and forensics

An Agent Based Approach for Migrating Web Services to Semantic Web Services

Knowledge Driven Architecture for Home Care

The WSDL2Agent Tool

Engineering Web Service Invocations from Agent Systems

Multi-Agent Systems and Applications IV

Multi-Agent Systems and Applications V

Traumatic retinal detachment—the difficulty and importance of correct diagnosis

Predictive Factors for Positive Margin and the Surgical Learning Curve in Non-Palpable Breast Cancer After Wire-Guided Localization – Prospective Study of 214 Consecutive Patients

Investigation of sulphur isotope variation due to different processes applied during uranium ore concentrate production

IRMM-1000a and IRMM-1000b uranium reference materials certified for the production date. Part I: methodology, preparation and target characteristics

Plutonium age dating (production date measurement) by inductively coupled plasma mass spectrometry

Titelbild: Uran aus deutschen Nuklearprojekten der 1940er Jahre – eine nuklearforensische Untersuchung (Angew. Chem. 45/2015)

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