Filters
Results 1 - 10 of 105
Results 1 - 10 of 105.
Search took: 0.029 seconds
| Sort by: date | relevance |
AbstractAbstract
No abstract available
Primary Subject
Source
2020; 100 p; Available from Vienna University of Technology Library, Resselgasse 4, 1040 Vienna (AT) and available from https://permalink.obvsg.at/AC11731597; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Country of publication
ACCELERATORS, BEAUTY MESONS, BEAUTY PARTICLES, BOSONS, CALCULATION METHODS, COMPOSITE MODELS, CYCLIC ACCELERATORS, DECAY, DIMENSIONLESS NUMBERS, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, FERMIONS, FIELD THEORIES, GRAND UNIFIED THEORY, HADRONS, MANY-BODY PROBLEM, MATHEMATICAL MODELS, MESONS, PARTICLE MODELS, POSTULATED PARTICLES, PSEUDOSCALAR MESONS, QUANTUM FIELD THEORY, QUARK MODEL, RADIATIONS, SPARTICLES, STOCHASTIC PROCESSES, STORAGE RINGS, SYMMETRY, SYNCHROTRONS, UNIFIED GAUGE MODELS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] An attractive alternative to the once-through disposal of electrorefiner salt is to selectively remove the active fission products from the salt and recycle the salt back to the electrorefiner (ER). This would allow salt reuse for some number of cycles before ultimate disposal of the salt in a ceramic waste form. Reuse of ER salt would, thus, greatly reduce the volume of ceramic waste produced during the pyroprocessing of spent nuclear fuel. This final portion of the joint I-NERI research project is to demonstrate the separation of fission products from molten ER salt by two methods previously selected during phase two (FY-08) of this project. The two methods selected were salt/zeolite contacting and rare-earth fission product precipitation by oxygen bubbling. The ER salt used in these tests came from the Mark-IV electrorefiner used to anodically dissolved driver fuel from the EBR-II reactor on the INL site. The tests were performed using the Hot Fuel Dissolution Apparatus (HFDA) located in the main cell of the Hot Fuels Examination Facility (HFEF) at the Materials and Fuels complex on the INL site. Results from these tests were evaluated during a joint meeting of KAERI and INL investigators to provide recommendations as to the future direction of fission product removal from electrorefiner salt that accumulate during spent fuel treatment. Additionally, work continued on kinetic measurements of surrogate quaternary salt systems to provide fundamental kinetics on the ion exchange system and to expand the equilibrium model system developed during the first two phases of this project. The specific objectives of the FY09 I-NERI research activities at the INL include the following: (1) Perform demonstration tests of the selected KAERI precipitation and INL salt/zeolite contacting processes for fission product removal using radioactive, fission product loaded ER salt; (2) Continue kinetic studies of the quaternary Cs/Sr-LiCl-KCl system to determine the rate of ion exchange during the salt/zeolite contacting process; (3) Compare the adsorption models to experimentally obtained, ER salt results; and (4) Evaluate results obtained from the oxygen precipitation and salt/zeolite ion exchange studies to determine the best processes for selective fission-product removal from electrorefiner salt.
Primary Subject
Secondary Subject
Source
1 Sep 2009; vp; AC07-05ID14517; Available from http://www.inl.gov/technicalpublications/Documents/4408283.pdf; PURL: https://www.osti.gov/servlets/purl/971358-sYYWq9/; doi 10.2172/971358
Record Type
Report
Literature Type
Progress Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] The current method for the immobilization of fission products that accumulate in electrorefiner salt during the electrochemical processing of used metallic nuclear fuel is to encapsulate the electrorefiner salt in a glass-bonded sodalite ceramic waste form. This process was developed by Argonne National Laboratory in the USA and is currently performed at the Idaho National Laboratory for the treatment of Experimental Breeder Reactor-II (EBR-II) used fuel. This process utilizes a 'once-through' option for the disposal of spent electrorefiner salt; where, after the treatment of the EBR-II fuel, the electrorefiner salt containing the active fission products will be disposed of in the ceramic waste form (CWF). The CWF produced will have low fission product loading of approximately 2 to 5 weight percent due to the limited fuel inventory currently being processed. However; the design and implementation of advanced electrochemical processing facilities to treat used fuel would process much greater quantities fuel. With an advanced processing facility, it would be necessary to selectively remove fission products from the electrorefiner salt for salt recycle and to concentrate the fission products to reduce the volume of high-level waste from the treatment facility. The Korean Atomic Energy Research Institute and the Idaho National Laboratory have been collaborating on I-NERI research projects for a number of years to investigate both aspects of selective fission product separation from electrorefiner salt, and to develop advanced waste forms for the immobilization of the collected fission products. The first joint KAERI/INL I-NERI project titled: 2006-002-K, Separation of Fission Products from Molten LiCl-KCl Salt Used for Electrorefining of Metal Fuels, was successfully completed in 2009 by concentrating and isolating fission products from actual electrorefiner salt used for the treated used EBR-II fuel. Two separation methods were tested and from these tests were produced concentrated salt products that acted as the feed material for development of advanced waste forms investigated in this proposal. Accomplishments from the first year activities associated with this I-NERI project included the down selection of candidate waste forms to immobilize fission products separated from electrorefiner salt, and the design of equipment to fabricate actual waste forms in the Hot Fuels Examination Facility (HFEF) at the INL. Reported in this document are accomplishments from the second year (FY10) work performed at the INL, and includes the testing of waste form fabrication equipment, repeating the fission product precipitation experiment, and initial waste form fabrication efforts.
Primary Subject
Secondary Subject
Source
1 Sep 2010; vp; AC07-05ID14517; Available from http://www.inl.gov/technicalpublications/Documents/4731799.pdf; PURL: https://www.osti.gov/servlets/purl/1004228-eAJqKi/; doi 10.2172/1004228
Record Type
Report
Literature Type
Progress Report
Report Number
Country of publication
DEVELOPED COUNTRIES, DOCUMENT TYPES, ELECTROLYSIS, ENERGY, ENERGY SOURCES, FUELS, ISOTOPES, LYSIS, MATERIALS, NATIONAL ORGANIZATIONS, NORTH AMERICA, OPTIMIZATION, PROCESSING, RADIOACTIVE MATERIALS, RADIOACTIVE WASTES, REACTOR MATERIALS, REFINING, SEPARATION PROCESSES, US AEC, US DOE, US ERDA, US ORGANIZATIONS, WASTES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
AbstractAbstract
[en] Extensions of the Standard Model (SM) of elementary particle physics like the Minimal Supersymmetric Standard Model (MSSM) can potentially contain new sources of quark flavour violation (QFV). Since these possible non-minimal QFV effects can influence various MSSM particle decays they can have a significant impact on MSSM particle searches at the Large Hadron Collider (LHC), among other things. Thus calculating these general QFV decays with high precision is necessary. In this thesis we calculate for the first time all squark and gluino two-body decay widths in the MSSM with general QFV at full one-loop level. We follow the SPA convention using the DRbar renormalisation scheme and include soft and hard photon/gluon bremsstrahlung to our decays. Based on our calculations we develop the first publicly available program package called FVSFOLD (Flavour Violating Squark Full One Loop Decays), which computes automatically all aforementioned non-minimal QFV decays at full one-loop level and uses the SLHA2 input/output format. We present a case study consisting of two scenarios to demonstrate the QFV functionality and usefulness of our code by comparing our full one-loop results with our supersymmetric-QCD (SUSY-QCD) and tree-level calculations and with the results from the program SPheno. In both scenarios we assume non-minimal QFV mixing between the second and third up-type squark generations and take the most important experimental constraints into account. We obtain significant deviations of decay widths and branching ratios from the quark flavour conserving case up to about 54 percent (23 percent) in squark (gluino) decays, depending on the QFV parameters. Moreover, we observe that the electroweak contributions can become even larger than the SUSY-QCD corrections (sometimes with opposite sign) and thus cannot be neglected. We conclude that it is important to account for possible non-minimal QFV effects in squark and gluino decays since they can have an influence on the squark and gluino searches at the LHC. Furthermore, it is necessary to include also electroweak corrections when calculating these QFV decays to attain an adequate accuracy. We further present an additional aspect of QFV decays by studying the uncertainties in the calculation of the rare B meson decay B to Xs gamma (an important constraint for general studies of the MSSM). In particular, we assess the uncertainties caused by different implementations via a numerical study comparing various public codes within the phenomenological MSSM (pMSSM). The impact of these uncertainties on global parameter fits of the pMSSM is explored via a global Bayesian analysis using Markov Chain Monte Carlo (MCMC) techniques. We obtain relative differences of the various MSSM predictions of about 10 percent. When comparing the SUSY contributions alone the relative differences drop down to about 3 percent, since the discrepancies in the SM predictions are quite large. When comparing programs with similar implementations we observe that the impact on global fits of the pMSSM is rather small (i.e. probability predictions differ only slightly). (author)
[de]
Erweiterungen des Standardmodells (SM) der Elementarteilchenphysik wie dem Minimal Supersymmetrischen Standardmodell (MSSM) koennen prinzipiell neue Quellen fuer Quark-Flavour-Verletzungen (QFV) enthalten. Da diese moeglichen nicht-minimalen QFV Effekte verschiedene MSSM Teilchenzerfaelle beeinflussen koennen, koennen sie unter anderem einen erheblichen Einfluss auf die Suche nach MSSM Teilchen am Large Hadron Collider (LHC) haben. Deshalb ist die Berechnung dieser allgemeinen QFV Zerfaelle mit hoher Genauigkeit notwendig. Wir berechnen in dieser Doktorarbeit zum ersten Mal alle Squark und Gluino Zweikoerperzerfallsbreiten im MSSM mit allgemeiner QFV auf vollem Einschleifenniveau. Wir beruecksichtigen die SPA Konvention, benutzen das DRbar Renormierungsschema und beziehen die weichen und harten Photon/Gluon-Bremsstrahlungsprozesse mit ein. Basierend auf unseren Berechnungen entwickeln wir das erste oeffentlich verfuegbare Programmpaket namens FVSFOLD (Flavour Violating Squark Full One Loop Decays), welches automatisch alle bereits erwaehnten nicht-minimalen QFV Zerfaelle auf vollem Einschleifenniveau berechnet und dabei das SLHA2 Eingabe-/Ausgabeformat benutzt. Wir praesentieren eine Fallstudie bestehend aus zwei Szenarien, um die QFV Funktionalitaet und Nuetzlichkeit unseres Programms anhand eines Vergleichs unseres kompletten Einschleifenresultats mit unseren supersymmetrischen-QCD (SUSY-QCD) und Born Resultaten sowie mit den Ergebnissen des Programms SPheno zu demonstrieren. In beiden Szenarien nehmen wir eine nicht-minimale QFV Mischung zwischen der zweiten und dritten Squark-Generation an und beruecksichtigen die wichtigsten experimentellen Einschraenkungen. Wir erhalten signifikante Abweichungen bei Zerfallsbreiten und Verzweigungsverhaeltnissen von dem Fall mit Quark-Flavour-Erhaltung, welche abhaengig von den QFV Parametern bis zu rund 54 Prozent (23 Prozent) bei Squark (Gluino) Zerfaellen betragen koennen. Darueber hinaus beobachten wir, dass die elektroschwachen Beitraege sogar groesser als die SUSY-QCD Korrekturen werden koennen (manchmal mit umgekehrten Vorzeichen) und man sie somit nicht vernachlaessigen kann. Wir schliessen daraus, dass es wichtig ist, moegliche nicht-minimale QFV Effekte in Squark und Gluino Zerfaellen zu beruecksichtigen, da sie einen Einfluss auf die Suche nach Squarks und Gluinos am LHC haben koennen. Ausserdem ist es notwendig, auch die elektroschwachen Korrekturen bei den Berechnungen dieser QFV Zerfaelle miteinzubeziehen, um eine angemessene Genauigkeit zu erreichen. Des Weiteren praesentieren wir einen zusaetzlichen Aspekt von QFV Zerfaellen, indem wir die Unsicherheiten in der Berechnung des seltenen B-Meson Zerfalls B in Xs Gamma untersuchen. (Dieser Zerfall dient als wichtige Einschraenkung fuer allgemeine Studien des MSSM.) Insbesondere schaetzen wir die Unsicherheiten aufgrund der unterschiedlichen Implementierungen mittels einer numerischen Studie ab, welche verschiedene oeffentlich verfuegbare Programme innerhalb des phenomenologischen MSSM (pMSSM) miteinander vergleicht. Die Auswirkungen dieser Unsicherheiten auf globale Parameterfits des pMSSM werden ueber eine globale Bayes-Analyse unter Verwendung von Markov-Ketten-Monte-Carlo-Verfahren (MCMC) untersucht. Wir erhalten relative Unterschiede der verschiedenen MSSM Berechnungen von rund 10 Prozent. Beim Vergleich der alleinigen SUSY-Beitraege fallen die relativen Unterschiede auf rund 3 Prozent, da die Unterschiede in den SM Berechnungen recht gross sind. Beim Vergleich von Programmen mit aehnlichen Implementierungen beobachten wir, dass die Auswirkungen auf globale Parameterfits des pMSSM gering ausfallen (d.h. die Wahrscheinlichkeitsprognosen unterscheiden sich kaum). (author)Primary Subject
Source
2014; 110 p; Also available from Vienna University of Technology Library, Resselgasse 4, 1040 Vienna (AT) and available from http://permalink.obvsg.at/AC11731597; Thesis (Ph.D.)
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ACCELERATORS, BEAUTY MESONS, BEAUTY PARTICLES, BOSONS, CALCULATION METHODS, COMPOSITE MODELS, CYCLIC ACCELERATORS, DECAY, ELECTROMAGNETIC RADIATION, ELEMENTARY PARTICLES, FERMIONS, FIELD THEORIES, GRAND UNIFIED THEORY, HADRONS, MATHEMATICAL MODELS, MATHEMATICS, MESONS, PARTICLE MODELS, PSEUDOSCALAR MESONS, QUANTUM FIELD THEORY, QUARK MODEL, RADIATIONS, STORAGE RINGS, SYMMETRY, SYNCHROTRONS, UNIFIED GAUGE MODELS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
External URLExternal URL
Frank, S. M.
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)1998
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)1998
AbstractAbstract
[en] Argonne National Laboratory has developed a glass-bonded sodalite ceramic waste form to immobilize fission products and plutonium that accumulate during the electrometallurgical conditioning of spent nuclear fuel. To investigate the effects of alpha decay damage on the structure and leaching characteristics of the ceramic material, 238Pu has been incorporated into the ceramic waste form. The 238Pu,with its higher specific activity, significantly increases the rate of alpha damage to the waste form. Long term studies have begun with periodic examination of the 238Pu loaded ceramic material. A number of characterization techniques are used to study the alpha decay damage on the structure of the waste form. In addition, PCT type leachate studies will be performed to determine the effect of alpha decay damage on the durability of the ceramic waste form. Preliminary results from this study are presented
Primary Subject
Secondary Subject
Source
16 Dec 1998; 10 p; 1998 Fall Meeting of the Materials Research Society; Boston, MA (United States); 30 Nov - 4 Dec 1998; W-31109-ENG-38; Also available from OSTI as DE00010868; PURL: https://www.osti.gov/servlets/purl/10868-iFbm3h/webviewable/
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, DECAY, DISPERSIONS, DISSOLUTION, ENERGY SOURCES, EVEN-EVEN NUCLEI, FUELS, HEAVY ION DECAY RADIOISOTOPES, HEAVY NUCLEI, HOMOGENEOUS MIXTURES, ISOTOPES, MANAGEMENT, MATERIALS, METALLURGY, MIXTURES, NUCLEAR DECAY, NUCLEAR FUELS, NUCLEI, PLUTONIUM ISOTOPES, RADIOACTIVE MATERIALS, RADIOACTIVE WASTE MANAGEMENT, RADIOACTIVE WASTES, RADIOISOTOPES, REACTOR MATERIALS, SEPARATION PROCESSES, SILICON 32 DECAY RADIOISOTOPES, SOLUTIONS, SPONTANEOUS FISSION RADIOISOTOPES, WASTE DISPOSAL, WASTE MANAGEMENT, WASTES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
MOORE, FRANK S.; SALAYMEH, SALEEM
Savannah River Site, Aiken, SC (United States). Funding organisation: US Department of Energy (United States)2005
Savannah River Site, Aiken, SC (United States). Funding organisation: US Department of Energy (United States)2005
AbstractAbstract
[en] The Analytical Development Section (ADS) of SRNL was requested to perform a waste disposal assay of two heater boxes which had been used in the HB Line dissolvers. They had been sent to SRNL for study to make recommendations on how to prevent future failure of the units when they were replaced. The study having been completed, the units needed to be characterized prior to sending to Solid Waste for disposal. An assay station consisting of a turntable, HPGe detector, CANBERRA Inspector, transmission source and a portable computer was set up to do the required assays. The assays indicate the presence of U-235, Pu-239 and Cs-137. No measurable amounts of U-235 or Pu-239 were found. Therefore the Minimum Detectable Activities for U-235 and Pu-239 were calculated. For Heater Box 1, 0.23 grams of U-235 and 0.24 grams of Pu-239. For Heater Box 2, the results were 0.21 grams of U-235 and 0.21 grams of Pu-239. This paper describes and documents the assays employed to determine the amount of U, Pu and Cs contents of the heater boxes. The paper provides results of SNM assays using traditional calibration of the system and on one based on modeling. It also provides the scientific community with data that will assist the user in determining the method of choice for assaying items with irregular geometries
Primary Subject
Source
15 Jun 2005; 8 p; AC09-96SR18500; Available OSTI as DE00881364; PURL: https://www.osti.gov/servlets/purl/881364-gc62Pt/
Record Type
Report
Report Number
Country of publication
ACTINIDE NUCLEI, ALPHA DECAY RADIOISOTOPES, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CESIUM ISOTOPES, COUNTING TECHNIQUES, EQUIPMENT, EVEN-ODD NUCLEI, HEAVY NUCLEI, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LABORATORY EQUIPMENT, MANAGEMENT, MATHEMATICS, MINUTES LIVING RADIOISOTOPES, NUCLEI, ODD-EVEN NUCLEI, PLUTONIUM ISOTOPES, RADIOACTIVE WASTE MANAGEMENT, RADIOISOTOPES, SPONTANEOUS FISSION RADIOISOTOPES, URANIUM ISOTOPES, WASTE DISPOSAL, WASTE MANAGEMENT, WASTES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Lambregts, M. J.; Frank, S. M.
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2001
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)2001
AbstractAbstract
[en] Argonne National Laboratory has developed an electrometallurgical treatment for DOE spent metallic nuclear fuel. Fission products are immobilized in a durable glass bonded sodalite ceramic waste form (CWF) suitable for long term storage in a geological repository. Cesium is estimated to be in the waste form at approximately 0.1 wt.%. The exact disposition of cesium was uncertain and it was believed to be uniformly distributed throughout the waste form. A correlation of X-ray diffractometry (XRD), electron microscopy (EM), and nuclear magnetic resonance spectroscopy (NMR) performed on surrogate ceramic waste forms with high cesium loadings found a high cesium content in the glass phase and in several non-sodalite aluminosilicate phases. Cesium was not detected in the sodalite phase
Primary Subject
Secondary Subject
Source
18 Dec 2001; 8 p; 2001 MRS Fall Meeting; Boston, MA (United States); 26 Nov - 30 Nov 2001; ISSN 0148-7191; 
; W-31-109-ENG-38; Available from PURL: https://www.osti.gov/servlets/purl/792123-pys6s8/native/
; W-31-109-ENG-38; Available from PURL: https://www.osti.gov/servlets/purl/792123-pys6s8/native/
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Frank, S.; Kuechler, B.C.; Kunkel, H.J.
Stone and Webster Engineering Corp., Boston, MA (USA)1982
Stone and Webster Engineering Corp., Boston, MA (USA)1982
AbstractAbstract
[en] Objective of this study was to determine methods for conducting an Integrated Leak Rate Test (ILRT) quickly and successfully. A two-step approach was utilized. The first step consisted of obtaining historical data from past ILRTs, identifying common problems, and making recommendations to solve any identified problems. The second step was the actual implementation of the recommendations at two selected power plants (Surry-2, Turkey Point-4) during an ILRT. Results of the two tests indicated that implemented recommendations would both shorten the length of an ILRT and increase the likelihood of having a successful ILRT
Primary Subject
Source
Nov 1982; 193 p; Available from NTIS, PC A09/MF A01 as DE83900745
Record Type
Report
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Nuclear steam generators designed for a 40-year service life may need replacement in 10 years or less because of corrosion and denting in the steam and feedwater side of the generator tubes. Corrective actions allow tubes to be plugged and removed when the walls thin beyond the acceptable point, but this reduces some of the surplus heat-transfer surface. Some utilities add sleeves to damaged tubes if costs and personnel exposure requirements allow. The key to extending plant life is careful monitoring and control of water chemistry in this area, particularly during outages. Other procedural changes in cleaning and maintenance to prevent leakage of air and cooling water into the condenser and to deaerate feedwater should prove effective
Primary Subject
Secondary Subject
Record Type
Journal Article
Journal
Electric Light and Power (Boston); ISSN 0013-4120; ; v. 60(11); p. 31, 34
; v. 60(11); p. 31, 34
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Frank, S. M.; Johnson, S. G.; Moschetti, T. L.
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)1998
Argonne National Lab., IL (United States). Funding organisation: US Department of Energy (United States)1998
AbstractAbstract
[en] Lattice parameters for a crystalline material can be obtained by several methods, notably by analyzing x-ray powder diffraction patterns. By utilizing a computer program to fit a pattern, one can follow the evolution or subtle changes in a structure of a crystalline species in different environments. This work involves such a study for an essential component of the ceramic waste form that is under development at Argonne National Laboratory. Zeolite 4A and zeolite 5A are used to produce two different types of waste forms: a glass-bonded sodalite and a glass-bonded zeolite, respectively. Changes in structure during production of the waste forms are discussed. Specific salt-loadings in the sodalite waste form are related to relative peak intensities of certain reflections in the XRD patterns. Structural parameters for the final waste forms will also be given and related to leachability under standard conditions
Primary Subject
Secondary Subject
Source
8 May 1998; 10 p; 100. Annual Meeting of the American Ceramic Society; Cincinnati, OH (United States); 3-8 May 1998; W-31-109-ENG-38; Also available from OSTI as DE00008917; PURL: https://www.osti.gov/servlets/purl/8917-rRR1OF/webviewable/
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
| 1 | 2 | 3 | Next |