Relevant bibliographies by topics / Ring valve

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ring valve'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Ring valve"

1

Simeonov, P., B. Barzashka, D. Trendafilova, J. Jorgova, D. Petkov, and P. Abedinov. "Valve in valve and valve in ring transcatheter aortic valve implantation." Bulgarian Cardiology 28, no. (2) (2022): 20–34. https://doi.org/10.3897/bgcardio.28.e82414.

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In recent years the trend towards surgical bioprosthetic valve implantation, especially among young patients, has increased in order to avoid anticoagulant therapy. The patient’s age remains one of the leading risk factors for valve dysfunction. Gold standard for treating such diseases was surgical reintervention until the development of transcatheter heart valves. By 2050 the annual number of patients undergoing surgical bioprosthetic valve implantation is expected to triple from an average of 290,000 in 2003 to over 850,000. This study presents the literature review of Valve in Valve a
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Dahle, Gry, Kjell-Arne Rein, and Anders L. Jönsson. "Transapical Valve-in-Valve-in-Ring for Stenotic Mitral Valve Repair." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 8, no. 5 (2013): 376–80. http://dx.doi.org/10.1097/imi.0b013e3182a6940b.

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A 53-year-old woman, previously treated with irradiation and chemotherapy for Hodgkin lymphoma, was referred for redovalve surgery. She had had a pacemaker implantation and undergone coronary bypass surgery, mitral valve repair with a Carpentier-Edwards 28-mm Physio-annuloplasty ring, as well as a mechanical tricuspid valve replacement and a transfemoral CoreValve 26-mm implantation. She had cardiac cachexia, pleura effusion, and a failed mitral valve repair with stenosis. She was judged inoperable for open surgery but suitable for a transapical valve-in-valve implantation on partial femorofem
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McCarthy, Patrick M. "Valve-in-Ring and the Forgotten Valve." JACC: Cardiovascular Interventions 10, no. 1 (2017): 64–65. http://dx.doi.org/10.1016/j.jcin.2016.11.018.

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Mohanakrishnan, Lakshman, Koyilil Vijayakumar, Ponnusamy Sukumaran, Narendran Menon, and S. Natarajan Partheeben. "Alternative Mitral Valve Ring." Annals of Thoracic Surgery 78, no. 6 (2004): 2214–15. http://dx.doi.org/10.1016/j.athoracsur.2004.01.050.

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Simeonov, P., B. Barzashka, D. Trendafilova, J. Jorgova, D. Petkov, and P. Abedinov. "Valve in valve and valve in ring transcatheter aortic valveimplantation." Bulgarian Cardiology 28, no. 2 (2022): 20–34. http://dx.doi.org/10.3897/bgcardio.28.e82414.

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In recent years the trend towards surgical bioprosthetic valve implantation, especially among young patients, has increased in order to avoid anticoagulant therapy. The patient’s age remains one of the leading risk factors for valve dysfunction. Gold standard for treating such diseases was surgical reintervention until the development of transcatheter heart valves. By 2050 the annual number of patients undergoing surgical bioprosthetic valve implantation is expected to triple from an average of 290,000 in 2003 to over 850,000. This study presents the literature review of Valve in Val
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Guedeney, Paul, Olivier Barthelemy, and Gilles Montalescot. "Transcatheter Mitral Valve Replacement for Valve-in-Ring." JACC: Cardiovascular Interventions 17, no. 7 (2024): 887–89. http://dx.doi.org/10.1016/j.jcin.2024.03.005.

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Çiçek, Ömert Faruk. "Mitral Valve Repair with Isolated Ring Annuloplasty: Mid-term Results of 43 Patients." Chronicles of Precision Medical Researchers 4, no. 2 (2023): 172–78. https://doi.org/10.5281/zenodo.8201989.

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<strong>Aim: </strong>Repair techniques are recommended for mitral regurgitation in appropriate cases. Although there are many different mitral valve repair techniques described, data on the outcomes of patients undergoing isolated ring annuloplasty are limited. In this study, we analyzed the operative and postoperative results of isolated ring annuloplasty. <strong>Material and Method: </strong>Forty-three patients who underwent isolated ring annuloplasty for mitral regurgitation were included in the study and the results were analyzed retrospectively. Patients were followed up for 18.4&plusm
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Cirillo, Marco. "Ring-first Mitral Valve Repair." Research Ideas and Outcomes 6 (December 30, 2020): e62369. https://doi.org/10.3897/rio.6.e62369.

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Mitral valve repair is one of the most frequent interventions in cardiac surgery. It involves eliminating the dysfunctional part(s) of the mitral valve and reconstructing, using the residual tissue or with the addition of prosthetic components, a properly functioning valve, without residual stenosis or regurgitation. A fundamental component of mitral repair is the implantation of a ring (annuloplasty) which reconstitutes the normal, saddle-shaped geometry of the valve. Such ring is usually implanted at the end of the surgical reconstruction regardless of the repair techniques. The implantation
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Baria, Kinnaresh, Jignesh Kothari, Sanjay Patel, and Yogini Kandre. "Evaluation of Outcomes of Tricuspid Valve Flexible Ring Annuloplasty with Left Sided Heart Valve Surgery." Journal of Cardiovascular Medicine and Surgery 4, no. 4 (2018): 261–69. http://dx.doi.org/10.21088/jcms.2454.7123.4418.1.

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Spapen, Jerrold, Pasquale Paolisso, and Guy Van Camp. "Mitral valve annuloplasty ring dehiscence." International Journal of Cardiovascular Imaging 37, no. 9 (2021): 2747–48. http://dx.doi.org/10.1007/s10554-021-02249-5.

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Dissertations / Theses on the topic "Ring valve"

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Hepples, Mark Thomas. "Development of an acellular annuloplasty ring for atrioventricular valve repair." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/11170/.

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Annuloplasty is a common technique used for repair of the mitral valve. It is hypothesised that an acellular biological ring may provide a superior solution by encouraging tissue integration and improved annular dynamics whilst offering similar structure and composition to the native annulus. Human mitral valve annuli (n=3) were characterised using histological methods to reveal the histoarchitecture of the native tissue. The histological features of porcine mitral valve annuli (n=5) were compared to the human annuli, as an alternative source of tissue. Haematoxylin and eosin, alcian blue and
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Sadeghi, Malvajerdi Neda. "Preliminary Analysis of an Internal Annuloplasty Ring for the Aortic Valve." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36142.

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Among the four valves of the heart, the aortic valve (AV) is frequently affected by disease. When progressive dilatation of the valve produces a leak when the valve should close (regurgitation), repair may be possible. AV repair is a desirable option because, contrary to AV replace-ment using a prosthesis, it does not require life-long anticoagulation treatment, and retains the original tissues that naturally combat structural degradation. All the AV repair procedures developed by cardiac surgeons require a good stabilization of the ventriculo-aortic junction (VAJ) diameter, through annuloplas
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Baxter, Iain A. "Finite Element Modeling of the Mitral Valve and Mitral Valve Repair." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22876.

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As the most commonly diseased valve of the heart, the mitral valve has been the subject of extensive research for many years. Prior research has focused on the development of surgical repair techniques and mainly consists of in vivo clinical studies into the efficacy and long-term effects of different procedures. There is a need for a means of studying the mitral valve ex vivo, incorporating patient data and the effects of different repair techniques on the valve prior to surgery. In this study, a method was developed for reconstructing the mitral valve from patient-specific data. Three-dimens
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Bertin, Michael. "Piezoelectric actuation of an aero engine fuel metering valve." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723329.

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Servo valves are used in a broad variety of flow modulation applications. In the field of aerospace, servo valves are used in aero engines to meter fuel flow. The existing valves are labour intensive to manufacture and highly optimised such that to achieve improvements in performance requires a novel design. This research investigates smart material actuators and valve concepts. Specifically, a prototype pilot stage nozzle flapper valve is developed for the purpose of actuating a main stage spool. The typical nozzle flapper type servo valve uses a torque motor to actuate the flapper. In this r
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Пчелінцев, Віктор Олександрович, Виктор Александрович Пчелинцев, Viktor Oleksandrovych Pchelintsev та Н. О. Зоренко. "Підвищення опору ударно-циклічним навантаженням титанових сплавів пластин кільцевих клапанів". Thesis, Вид-во СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/6353.

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Baggio, Mayarha Patricia Dequigiovanni. "Susceptibilidade do piloro de Bombyx mori (Lepidoptera, bombycidae) ao bombyx mori multiple nucleopolyhedrovirus." Universidade Estadual do Oeste do Parana, 2013. http://tede.unioeste.br:8080/tede/handle/tede/635.

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Made available in DSpace on 2017-07-10T14:17:04Z (GMT). No. of bitstreams: 1 Mayaha.pdf: 4416602 bytes, checksum: 8b663982eaff70076dc570733618b841 (MD5) Previous issue date: 2013-08-01<br>Bombyx mori multiple nucleopolyedrovirus (BmMNPV) is an entomopathogenic virus of the Baculoviridaefamily, genera Alphabaculovirus, which infects the silkworm (Bombyx Mori) and causes nuclear polyhedrosis disease. This virus is poliorganotrophic and a series of tissues are known as targets; however, literature does not present information in regards to the pylorus, segment of the hindgut, present in the tra
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Musil, Tomáš. "Projekt automatizace montáže drobných dílců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401015.

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The thesis deals with the possibilities of pre-assembly automation overflow valves at Bosch Diesel s.r.o. in Jihlava. At the beginning, you will find an introduction to the company's production portfolio and an explanation of where and for what purpose the overflow valve is used. This is followed by an analysis of the type spectrum of overflow valves and a description of the differences of individual components. The thesis also deals with time analysis of current working time using MTM analysis and description of existing assembly process. After this research, processes suitable for automation
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Forsberg, Peter. "Combustion Valve Wear : A Tribological Study of Combustion Valve Sealing Interfaces." Doctoral thesis, Uppsala universitet, Tillämpad materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204636.

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The exhaust valve system of combustion engines experiences a very complex contact situation of frequent impact involving micro sliding, high and varying temperatures, complex exhaust gas chemistry and possible particulates, etc. In addition, the tribological situation in the exhaust valve system is expected to become even worse due to strict future emission regulations, which will require enhanced combustion and cleaner fuels. This will substantially reduce the formation of combustion products that might ease the contact conditions by forming tribofilms on the contacting surfaces. The lack of
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Ranatunga, Padmasiri Vipul. "Modeling of profile ring rolling with upper bound elemental technique." Ohio : Ohio University, 2002. http://www.ohiolink.edu/etd/view.cgi?ohiou1178730881.

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de, Brun Mangs Jonathan, and Mikael Tillquist. "Evaluation of a Programmable Hydraulic Valve for Drill Rig Applications." Thesis, Linköpings universitet, Fluida och mekatroniska system, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148675.

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The increase of intelligent systems can be seen in every industry. Integrated sensors and processors are used with internal control systems to create better performance for mobile hydraulic applications. The report describes how an evaluation was made to see if the productivity of a drill rig could be increased. This was done by implementing a programmable hydraulic valve to control the hydraulic drilling functions. The productivity would be increased by reducing the downtime due to jamming in the drill hole. Jamming occur when the system does not compensate for changes in rock conditions. By
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Books on the topic "Ring valve"

1

Newman, Renée. The diamond ring buying guide: How to spot value & avoid ripoffs. 4th ed. International Jewelry Publications, 1993.

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Newman, Renée. The diamond ring buying guide: How to spot value & avoid ripoffs. 2nd ed. International Jewelry Publications, 1991.

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Newman, Renée. The diamond ring buying guide: How to spot value & avoid ripoffs. 3rd ed. International Jewelry Publications, 1992.

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Newman, Renée. The diamond ring buying guide: How to spot value & avoid ripoffs. International Jewelry Publications, 1989.

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Gottschalk, Lillian. Figural napkin rings: Collector's identification and value guide. Collector Books, 1996.

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Tignol, Jean-Pierre, and Adrian R. Wadsworth. Value Functions on Simple Algebras, and Associated Graded Rings. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16360-4.

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Census Of Manufactures, Final Reports, Industry Series: Carburetor, Piston, Piston Ring, And Valve Manufacturing 2002. Bernan Assoc, 2004.

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Selton-Suty, Christine, Olivier Huttin, Clément Venner, and Yves Juillière. Functional anatomy of right heart valves. Edited by Yen Ho. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198784906.003.0019.

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This chapter summarizes the anatomical features of right heart valves. The tricuspid valve usually comprises three leaflets (anterior, septal, and posterior) separated by three commissures (anteroseptal, posteroseptal, and anteroposterior). The tricuspid valve apparatus consists of papillary muscles and chordae with high variability in number, length, shape, and arrangement of papillary muscles. The tricuspid valve leaflets are attached to a fibrous annulus with an ovoid saddle shape. The pulmonary valve and the aortic valve have identical architecture: three cusps (anterior, left, and right)
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Thorne, Sara, and Paul Clift, eds. Atrioventricular septal defects (AVSDs). Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199228188.003.0015.

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Definition 110Associations 110Incidence and recurrence 110Clinical presentation 112Investigation 112Surgical management 112Late complications post repair of AVSD 112• Key feature = common atrioventricular (AV) junction and AV valve ring.• The atrial component of an AVSD = ostium primum ASD....
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Thorne, Sara, and Paul Clift, eds. Ebstein anomaly. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199228188.003.0011.

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Definition 86Incidence 86Associations 86Natural history 86Presenting features in the adult 86Physical signs 88Failure of delamination of the TV leaflets causes apical displacement of the value away from the atrioventricular ring. This leads to: • Atrialization of the proximal part of the RV → enlarged RA....
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Book chapters on the topic "Ring valve"

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Maalouf, Joseph F., Jeremy J. Thaden, and Sushil Allen Luis. "Valve-in-Valve/Ring Implantation." In Practical 3D Echocardiography. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72941-7_31.

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Arora, Amit, and Anelechi C. Anyanwu. "Prosthetic Ring Choice in Secondary Mitral Regurgitation." In Secondary Mitral Valve Regurgitation. Springer London, 2014. http://dx.doi.org/10.1007/978-1-4471-6488-3_10.

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Lansac, Emmanuel, and Isabelle Di Centa. "External Aortic Ring Annuloplasty to Standardize Aortic Valve Repair." In Advances in Treatments for Aortic Valve and Root Diseases. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-66483-5_10.

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Bailey, Ann, Michelle Beatty, and Olga Pierrakos. "Investigating Vortex Ring Propagation Speed Past Prosthetic Heart Valves: Implications for Assessing Valve Performance." In IFMBE Proceedings. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14998-6_95.

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Schulte, H. D., J. Winter, D. Horstkotte, and W. Bircks. "The Narrow Aortic Valve Ring: Technique of Enlargement Using Autologous Pericardium." In Cardiac Reconstructions. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74629-1_32.

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Lansac, Emmanuel, and I. Di Centa. "From dynamic anatomy to conservative aortic valve surgery: the tale of the ring." In Aortic Root Surgery. Steinkopff, 2010. http://dx.doi.org/10.1007/978-3-7985-1869-8_10.

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Sovic, William Ryan, Quynh Ngo, Srikant Patlolla, Joseph M. Guileyardo, and William C. Roberts. "Isolated Mitral Valve Endocarditis with Ring Abscess and Pericarditis in End-Stage Renal Disease." In Case Reports in Cardiology. CRC Press, 2023. http://dx.doi.org/10.1201/9781003409281-64.

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Felner, Joel M., and Jing Ping Sun. "Mitral Valve Repair with the use of an Annuloplasty Ring: The Importance of Echocardiography." In Practical Handbook of Echocardiography. Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444320367.ch13.

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Johnson, Walter H., and James K. Kirklin. "Left Ventricular Inflow Obstruction: Pulmonary Vein Stenosis, Cor Triatriatum, Supravalvar Mitral Ring, Mitral Valve Stenosis." In Pediatric Cardiovascular Medicine. Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781444398786.ch27.

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Kalangos, A. "Mitral valve repair using biodegradable annuloplasty rings." In Mitral Valve Repair. Steinkopff, 2011. http://dx.doi.org/10.1007/978-3-7985-1867-4_4.

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Conference papers on the topic "Ring valve"

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Ren, Menggan, Jingying Xu, Chunming Su, et al. "Analysis of Stress Distribution in the Sealing Ring of Converter Valve Under Multi-Physics Fields." In 2024 International Conference on HVDC (HVDC). IEEE, 2024. http://dx.doi.org/10.1109/hvdc62448.2024.10722927.

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Maldonado, G. D., T. J. Demal, O. D. Bhadra, et al. "5-year Outcomes Following Valve-in-Ring and Valve-in-Valve Procedures for Failing Mitral Annuloplasty Rings and Bioprosthetic Valves." In 53rd Annual Meeting of the German Society for Thoracic and Cardiovascular Surgery (DGTHG). Georg Thieme Verlag KG, 2024. http://dx.doi.org/10.1055/s-0044-1780577.

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Schneeberger, Y., A. Schaefer, N. Schofer, et al. "Balloon- and Mechanical-Expandable Transcatheter Heart Valves for Mitral Valve-in-Valve and Valve-in-Ring Procedures." In 48th Annual Meeting German Society for Thoracic, Cardiac, and Vascular Surgery. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1679001.

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Silaschi, M., E. Alaj, N. Wilde, et al. "Reoperative Mitral Valve Replacement versus Transcatheter Valve-in-Valve and Valve-in-Ring Procedures in High-Risk Patients." In 52nd Annual Meeting of the German Society for Thoracic and Cardiovascular Surgery (DGTHG). Georg Thieme Verlag KG, 2023. http://dx.doi.org/10.1055/s-0043-1761757.

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Annicchiarico, Claudio, Alberto Babbini, Renzo Capitani, and Pierluigi Tozzi. "Numerical and Experimental Testing of Composite Rings for Reciprocating Compressor Valves." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97984.

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Valves are one of the most critical class of components for the reliability of reciprocating compressors. Many failures of reciprocating compressor valves are due to valve ring failure. Investigating the failure mode of rings is complicated because of the ring composite material properties, which randomly and locally range from orthotropic to anisotropic due to the random disposition of the reinforcement, usually consisting of short fibers. In this paper, a cooperation between GE Oil &amp; Gas and the University of Florence, the results of a numerical simulation campaign will be presented, alo
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Alexiou, K., S. M. Tugtekin, K. Matschke, U. Kappert, M. Wilbring, and S. Arzt. "Does Clinical Outcome Still Justify the Application of Transcatheter Mitral Valve in Valve or Valve in Ring Procedures?" In 50th Annual Meeting of the German Society for Thoracic and Cardiovascular Surgery (DGTHG). Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/s-0041-1725718.

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Reich, Alton, and Roberto DiSalvo. "Analytical Method for Evaluating a 4-Piece Retaining Ring." In ASME 2022 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/pvp2022-83675.

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Abstract Valves used for nuclear power applications are designed according to the rules in the ASME Section III Code [1]. A review of the applicable rules governing valve design (i.e. NC-3500) reveals that the Code favors valve body designs with very conventional shapes and elements. The nuclear supplier base has contracted over the past few decades and there are significantly fewer vendors that maintain nuclear QA programs than in the past. As a result, there has been an increasing trend toward using commercial grade dedication (CGD) methods to enable the use of valves successfully deployed i
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Frishman, Samuel, Annabel M. Imbrie-Moore, Mark R. Cutkosky, et al. "Selectively Compliant Annuloplasty Ring to Enable Annular Dynamics in Mitral Valve Repair Evaluated by In-Vitro Stereovision." In 2020 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/dmd2020-9034.

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Abstract Mitral valve (MV) annular dynamics are critical to the long term efficacy of MV repair. Today’s annuloplasty rings, used to restore MV function, impose significant constraints on the motion profile of the MV annulus. We present a selectively compliant ring that provides sufficient stiffness to stabilize a diseased annulus while allowing physiological annular dynamics. Ring design is informed by a finite element analysis and experimentally evaluated with in-vitro stereophotogrammetry. We compare the ring dynamics to commercially available semi-rigid rings as well as values found in lit
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Pierrakos, Olga, and Pavlos Vlachos. "Turbulent vs. Vortex Ring Energy Losses in the Left Ventricle." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176668.

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Left ventricular flows in the human heart are very complex due to the intricate geometry, the pulsatile character of the flow, the interaction of the jets with the LV flexible walls, and the unsteady motion of the leaflets, which generate intrinsically complicated flow structures. Furthermore, although mechanical heart valves (MHV) have received universal recognition, their performance is still unmatched to that of the natural valves. The flow past MHVs induces a combination of flow characteristics, which are clearly dependent on the specific valve design and valve orientation. Traditionally,
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Aicher, D., A. Micelli, M. Glauber, et al. "Minimally Invasive Aortic Valve Repair Using Internal Ring Annuloplasty." In 48th Annual Meeting German Society for Thoracic, Cardiac, and Vascular Surgery. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1678894.

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Reports on the topic "Ring valve"

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Song, J. J. RF characteristics of the APS storage ring isolation valve. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/87851.

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Vieira, Greg, Titilope Banji, Rachel Lorenzen, and Daniel Olsen. PR179-21205-R01 Methane Abatement from LB NG 2-Stroke Cycle Engines Through In-Cylinder Modifications. Pipeline Research Council International, Inc. (PRCI), 2024. http://dx.doi.org/10.55274/r0000097.

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There are over 7000 of large bore integral compressor engines distributed along the interstate and intrastate natural gas pipelines in the United States for gas compression. Methane emissions from large bore engines stem primarily from poor combustion efficiency. This study aims to improve the combustion efficiency of these engines, by reducing the amount of unburned methane that can escape through the crankcase vent and the exhaust gas emissions. Two broad approaches are taken to achieve this objective using experimental testing and computational studies: hydrogen blending and late cycle high
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Johnson, Derek, and Nigel Clark. PR-746-22204-R01 Review of Technologies to Enable In-situ Valve Service to Reduce Methane Emissions. Pipeline Research Council International, Inc. (PRCI), 2024. http://dx.doi.org/10.55274/r0000058.

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Leaking gas industry valve stem seals are recognized as a substantial source of atmospheric methane, which is a greenhouse gas. Newly proposed regulations include methane alongside volatile organic compound emissions, with leak detection and repair requirements. If a leak is identified a first attempt at repair must occur no later than five calendar days after identification, or else be justifiably delayed. The objective of this report is to review valve technology and methods used to address in-situ valve stem leak repair that offers an economical solution with reduced service disruption. A w
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Lewan. PR-389-114503-R01 Leak Prevention in CO2 Pipeline Valves and Launches By Correct Seal Material Selection. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010086.

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Pipeline Research Council International, Inc. (PRCI) required guidelines for pipeline valve stem seals in CO2 rich applications such as for enhanced oil recovery (EOR) and carbon capture and storage (CCS). In particular, guidance was needed to ascertain when standard O-rings may be used, when a switch to rapid gas decompression (RGD) resistant O-rings is recommended and when O-rings should be replaced by more robust energized lip seals and/or by more robust seal materials. The guidelines would interface with both NORSOK M 710 Rev. 3 and ISO 23936-2, and give specific details on procedures, ste
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Lewan. PR-389-114503-R02 Leak Prevention in CO2 Pipeline Valves and Launches by Correct Seal Material Selection. Pipeline Research Council International, Inc. (PRCI), 2014. http://dx.doi.org/10.55274/r0010537.

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Abstract:
PRCI required guidelines for pipeline valve stem seals in CO2 rich applications such as for enhanced oil recovery (EOR) and carbon capture and storage (CCS). In particular, guidance was needed to ascertain when standard O-rings may be used, when a switch to rapid gas decompression (RGD) resistant O-rings is recommended and when O-rings should be replaced by more robust energized lip seals and/or by more robust seal materials. The guidelines would interface with both NORSOK M 710 Rev. 3 and ISO 23936-2, and give specific details on procedures, steps and decisions that have to be taken when atte
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Stromer, Bobbi, Anthony Bednar, Milo Janjic, et al. Trace explosives detection by cavity ring-down spectroscopy (CRDS). Engineer Research and Development Center (U.S.), 2021. http://dx.doi.org/10.21079/11681/41520.

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We built three successive versions of a thermal decomposition cavity ring-down spectrometer and tested their response to explosives. These explosive compound analyzers successfully detected nitroglycerine, 2,4,6-trinitrotoluene (TNT), pentaerythryl tetranitrate, hexahydro-1,3,5-trinitro-s-triazine and triacetone triperoxide (TATP). We determined the pathlength and limits of detection for each, with the best limit of detection being 13 parts per trillion (ppt) of TNT. For most of the explosive tests, the peak height was higher than the expected value, meaning that peroxy radical chain propagati
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Kawai, Kei, Jun Nakabayashi, and Juan Ortner. The Value of Privacy in Cartels: An Analysis of the Inner Workings of a Bidding Ring. National Bureau of Economic Research, 2021. http://dx.doi.org/10.3386/w28539.

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Stevens, R. D., B. V. Chapnik, and B. Howe. L51960 Acoustical Pipe Lagging Systems Design and Performance. Pipeline Research Council International, Inc. (PRCI), 1998. http://dx.doi.org/10.55274/r0010392.

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Noise levels radiated from the exterior of a pipe wall can significantly contribute to the overall noise levels on the site of a gas plant and at neighboring properties. The noise inside the piping is generated both by the gas compressor itself, and by the flow of gas through valves, elbows and fittings. Sound inside the pipe couples to the pipe wall by exciting vibration modes, some of which are radiated from the exterior of the pipe into the air. Piping is geometrically circular, which provides it with considerable increased stiffness versus a flat plate, and thereby assists in its ability t
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Olsen, Luedeman, and Lanham. PR-179-13201-R01 Cylinder Wall Lubrication for Power Cylinder Timed Lube Oil Injection. Pipeline Research Council International, Inc. (PRCI), 2014. http://dx.doi.org/10.55274/r0010032.

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A retrofit lube oil injection system is designed with the capability of injecting oil through two lube ports on each cylinder at any time during the engine cycle. The system is installed and tested on a Cooper-Bessemer GMV4 engine. Variations in number of skip cycles, average lube rate, and injection timing are evaluated. Lube oil carry-over is quantified using a dilution tunnel and a standard particulate matter gravimetric measurement technique. Cylinder wall lubrication is quantified using a custom designed fixture that is inserted into the fuel valve port between data points when the engine
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Greenfeld, Joshua, Eugene Golub, Robert Dresnack, F. H. (Bud) Griffis, and Louis J. Pignataro. DTRS-56-94-C-0006 Pipeline Accident Effects for Hazardous Liquid Pipelines. Pipeline Research Council International, Inc. (PRCI), 1996. http://dx.doi.org/10.55274/r0012146.

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Identified the factors that cause pipeline failures and the factors that affect accidents on hazardous liquid pipelines. Since the normalizing of the data was not possible, the authors of this report used indirect and inferential approaches in the analysis. The databases used for this analysis are LIQUID (accident data for 1968-1985) and L1QLCK (accident data for 1985-present). The main finding of this report is that better and more complete data on hazardous liquid accidents should be collected. Other conclusions are that prevention programs should be more effective, and pipe components such
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