Relevant bibliographies by topics / Ringel

Contents

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

Academic literature on the topic 'Ringel'

Author: Grafiati
Published: 20 February 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Ringel.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Ringel"

1

Coulembier, Kevin. "Ringel duality and Auslander–Dlab–Ringel algebras." Journal of Pure and Applied Algebra 222, no. 12 (December 2018): 3831–48. http://dx.doi.org/10.1016/j.jpaa.2018.02.009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Conde, Teresa, and Karin Erdmann. "The Ringel dual of the Auslander–Dlab–Ringel algebra." Journal of Algebra 504 (June 2018): 506–35. http://dx.doi.org/10.1016/j.jalgebra.2018.02.029.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Scott, Vanda. "Erwin Ringel Award 1995." Crisis 16, no. 3 (May 1995): 139. http://dx.doi.org/10.1027/0227-5910.16.3.139.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Saito, Yukio. "Erwin Ringel Award, 1997." Crisis 18, no. 2 (March 1997): 95. http://dx.doi.org/10.1027/0227-5910.18.2.95.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tesar, Esther Hunt. "Genus distribution of Ringel ladders." Discrete Mathematics 216, no. 1-3 (April 2000): 235–52. http://dx.doi.org/10.1016/s0012-365x(99)00250-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Deng, Bangming, and Jie Xiao. "On Double Ringel–Hall Algebras." Journal of Algebra 251, no. 1 (May 2002): 110–49. http://dx.doi.org/10.1006/jabr.2001.9151.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

FRISK, ANDERS, and VOLODYMYR MAZORCHUK. "PROPERLY STRATIFIED ALGEBRAS AND TILTING." Proceedings of the London Mathematical Society 92, no. 1 (December 19, 2005): 29–61. http://dx.doi.org/10.1017/s0024611505015431.

Full text
Abstract:
We study the properties of tilting modules in the context of properly stratified algebras. In particular, we answer the question of when the Ringel dual of a properly stratified algebra is properly stratified itself, and show that the class of properly stratified algebras for which the characteristic tilting and cotilting modules coincide is closed under taking the Ringel dual. Studying stratified algebras whose Ringel dual is properly stratified, we discover a new Ringel-type duality for such algebras, which we call the two-step duality. This duality arises from the existence of a new (generalized) tilting module for stratified algebras with properly stratified Ringel dual. We show that this new tilting module has a lot of interesting properties; for instance, its projective dimension equals the projectively defined finitistic dimension of the original algebra, it guarantees that the category of modules of finite projective dimension is contravariantly finite, and, finally, it allows one to compute the finitistic dimension of the original algebra in terms of the projective dimension of the characteristic tilting module.
APA, Harvard, Vancouver, ISO, and other styles
8

Deng, Bangming, and Changchang Xi. "Ringel duals of quasi-hereditary algebras." Communications in Algebra 24, no. 9 (January 1996): 2825–38. http://dx.doi.org/10.1080/00927879608825715.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Goldney, Robert D. "The Ringel Service Award: The Man." Crisis 27, no. 1 (January 2006): 51–52. http://dx.doi.org/10.1027/0227-5910.27.1.51.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

ERDMANN, KARIN, and ANNE HENKE. "On Ringel duality for Schur algebras." Mathematical Proceedings of the Cambridge Philosophical Society 132, no. 1 (January 2002): 97–116. http://dx.doi.org/10.1017/s0305004101005485.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Ringel"

1

Albertshauser, Jennifer Maria [Verfasser], Florian [Akademischer Betreuer] [Gutachter] Ringel, and Bernhard [Gutachter] Meyer. "Persönlichkeitsmerkmale bei Patienten mit neuroepithelialen Tumoren / Jennifer Maria Albertshauser ; Gutachter: Florian Ringel, Bernhard Meyer ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1126115592/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Schäffner, Michael Anton [Verfasser], Florian [Akademischer Betreuer] Ringel, and Bernhard [Akademischer Betreuer] Meyer. "Intraoperatives Neuromonitoring bei der Resektion supratentorieller Metastasen / Michael Anton Schäffner. Gutachter: Florian Ringel ; Bernhard Meyer. Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1069127388/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Peschke, Patrick Konstantin [Verfasser], Florian [Akademischer Betreuer] Ringel, Claus [Gutachter] Zimmer, and Florian [Gutachter] Ringel. "Positronen-Emissionstomografie und Magnetresonanztomografie bei Anaplastischen Gliomen (WHO III) / Patrick Konstantin Peschke ; Gutachter: Claus Zimmer, Florian Ringel ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1165773015/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hernandez, Cammardella Jasmin Jeanette Christiane [Verfasser], Florian [Akademischer Betreuer] Ringel, Florian [Gutachter] Ringel, and Bernhard [Gutachter] Meyer. "Kognitive Funktionen bei Patienten mit neuroepithelialen Tumoren / Jasmin Jeanette Christiane Hernandez Cammardella ; Gutachter: Florian Ringel, Bernhard Meyer ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1207074853/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Schnurbus, Lea Elaine [Verfasser], Florian [Akademischer Betreuer] Ringel, Florian [Gutachter] Ringel, and Bernhard [Gutachter] Meyer. "Chirurgische Therapie von primär als nicht-operabel eingestuften hirneigenen Tumoren / Lea Elaine Schnurbus ; Gutachter: Florian Ringel, Bernhard Meyer ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1172880093/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ott, Stephanie Elisabeth [Verfasser], Florian [Akademischer Betreuer] Ringel, and Bernhard [Akademischer Betreuer] Meyer. "VarioGuide: ein neues rahmenloses bildgesteuertes Stereotaxiesystem - Genauigkeitsstudie und klinische Einschätzung / Stephanie Elisabeth Ott. Gutachter: Florian Ringel ; Bernhard Meyer. Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1069127442/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Gradtke, Corinna Viktoria [Verfasser], Florian [Akademischer Betreuer] [Gutachter] Ringel, and Thomas R. [Gutachter] Tölle. "Kognitive Funktionen von Patienten mit Hirntumor im frühen postoperativen Verlauf / Corinna Viktoria Gradtke ; Gutachter: Thomas R. Tölle, Florian Ringel ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1126115533/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ringel, Michael Thomas [Verfasser]. "Enzymology of the periplasmic pyoverdine maturation / Michael Thomas Ringel." Hannover, 2018. http://d-nb.info/1181324092/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Voigt, Florian [Verfasser], Florian [Akademischer Betreuer] Ringel, and Bernhard [Akademischer Betreuer] Hemmer. "Die Rolle der toll-like-Rezeptoren beim sekundären Hirnschaden nach experimentellem Schädel-Hirn-Trauma / Florian Voigt. Gutachter: Florian Ringel ; Bernhard Hemmer. Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1047185482/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ruhland, Julia [Verfasser], Florian [Akademischer Betreuer] Ringel, Florian [Gutachter] Ringel, and Bernhard [Gutachter] Meyer. "Neurokognitive Veränderungen im Bereich der Aufmerksamkeit bei benignen intrakraniellen Raumforderungen im prä-und postoperativen Vergleich / Julia Ruhland ; Gutachter: Florian Ringel, Bernhard Meyer ; Betreuer: Florian Ringel." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1197232281/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Ringel"

1

Ringel, M. J. M. Franz Ringel. [Wien?]: Edition Falter/Deuticke, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kunterbunte Kinderreime: Ringel, Ringel, Reihe ... ; 18+ Monate. Nürnberg: Tessloff, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Boie, Kirsten. Ringel, Rangel, Rosen. Hamburg: Oetinger, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ringel, M. J. M. M.J.M. Ringel: Arbeiten auf Papier. Wien: [s.n.], 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ringel, Angela, and Ludwig Adamovich. Österreichs verwundete Seele: 20 Jahre nach Erwin Ringel. Wien: Kremayr & Scheriau, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

What they could not forget: Holocaust memoirs of Leo and Wjera Ringel. 2nd ed. Larkspur, CO: Publishing for the Generations, Inc., 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Gerhard, Ringel, Bodendiek Rainer, and Henn Rudolf, eds. Topics in combinatorics and graph theory: Essays in honour of Gerhard Ringel. Heidelberg: Physica-Verlag, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ringel, Erwin. Erwin Ringel: Die wichtigsten Schriften : mit Kommentaren von seinen Schülern, Freunden u. Weggefährten. Wien: Ueberreuter, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Danielle, Steel. Ringen. Oslo: Bladkompaniet, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Thayer, James Stewart. Ringer. New York: Crown Publishers, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Ringel"

1

Deng, Bangming, Jie Du, Brian Parshall, and Jianpan Wang. "Ringel-Hall algebras." In Finite Dimensional Algebras and Quantum Groups, 437–65. Providence, Rhode Island: American Mathematical Society, 2008. http://dx.doi.org/10.1090/surv/150/11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lönnqvist, Jouko. "The Erwin Ringel Memorial Lecture." In Suicide Prevention, 167–72. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/0-306-47210-4_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Rieken, Bernd. "Erwin Ringel: Selbstschädigung durch Neurose." In Einhundert Meisterwerke der Psychotherapie, 173–75. Vienna: Springer Vienna, 2008. http://dx.doi.org/10.1007/978-3-211-69499-2_82.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Aigner, M., and E. Triesch. "Irregular Assignments and Two Problems à la Ringel." In Topics in Combinatorics and Graph Theory, 29–36. Heidelberg: Physica-Verlag HD, 1990. http://dx.doi.org/10.1007/978-3-642-46908-4_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

KLL. "Rinser, Luise: Die gläsernen Ringe." In Kindlers Literatur Lexikon (KLL), 1–2. Stuttgart: J.B. Metzler, 2020. http://dx.doi.org/10.1007/978-3-476-05728-0_19036-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Gooch, Jan W. "Ringer." In Encyclopedic Dictionary of Polymers, 634. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10067.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Weik, Martin H. "ringer." In Computer Science and Communications Dictionary, 1496. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_16414.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wolfart, Jürgen. "Ringe." In Einführung in die Zahlentheorie und Algebra, 61–90. Wiesbaden: Vieweg+Teubner, 2011. http://dx.doi.org/10.1007/978-3-8348-9833-3_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wüstholz, Gisbert, and Clemens Fuchs. "Ringe." In Algebra, 88–103. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-31264-0_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Fischer, Gerd. "Ringe." In Lehrbuch der Algebra, 167–285. Wiesbaden: Springer Fachmedien Wiesbaden, 2017. http://dx.doi.org/10.1007/978-3-658-19218-1_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Ringel"

1

Moore, William. "Damage Mechanisms Found in Generator Rotor 18Mn18Cr Retaining Rings." In ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/power2016-59101.

Full text
Abstract:
Generator rotor retaining rings are one of the most highly stressed components in the generator rotor. Additionally, some retaining ring materials such as 18Mn5Cr, have been susceptible to Stress Corrosion Cracking (SCC). 18Mn18Cr retaining ring material has been used to replace older 18Mn5Cr material rings with great success. The 18Mn18Cr material has been found to be resistant to SCC in the presence of moisture. Recently, one OEM (Original Equipment Manufacturer) called for inspections of 18Mn18Cr rings, despite its reliable performance in the industry. Although resistant to SCC, some 18Mn18Cr rings have been found with cracks and other damage. The author’s company felt that it would be of value to go back through past job records with rotors that were identified to have 18Mn18Cr retaining rings, and review those records and report on the results of ring inspections due to damage. The author’s company typically rewinds dozens of rotors per year, with many of the rings manufactured from 18Mn18Cr. As part of a rewind, rings are disassembled and inspected. Of course, many rewinds are done because of failures, mostly related to the field winding. An XRF (X-Ray Fluorescence) analyzer is used to determine a ring’s composition. It has excellent accuracy, and can easily distinguish between 18Mn18Cr material and other non-magnetic steels, such as the once common 18Mn5Cr. Magnetic rings are easily distinguishable by a magnet, by manufacturer and rating, and / or by ventilation method. A total of seventeen (17) 18Mn18Cr ring metallurgical investigation reports were reviewed. These metallurgical investigations were conducted between 2008 and 2014. Reports reviewed included only those retaining ring inspections that were done to diagnose some visible damage to one or two retaining rings. In other words, if an 18Mn18Cr retaining had some indication of damage, the detailed inspection report and analysis was included and reviewed as part of this paper. Rings that were inspected and had no issues are not included. Rings that had damage due to some obvious man-made issues were not included. For example, one generator rotor had an 18Mn18Cr ring that had an obvious grinding wheel cut. The owner was aware that this damage had occurred during a prior repair. This metallurgical investigation was not included in this study. Another finding not included in this study was an 18Mn18Cr retaining ring with a high hardness variation, well beyond the tolerance standards and acceptance criteria used by NEC. Since there was no physical damage to the ring surface and no cracking, pitting or other abnormality present, this ring’s inspection report was also excluded. Only rings with some type of visual evidence of pitting, corrosion, fretting or material upset were included and make up the 17 generator rotors.
APA, Harvard, Vancouver, ISO, and other styles
2

Liu, Liang, and Tian Tian. "A Three-Dimensional Model for Piston Ring-Pack Dynamics and Blow-By Gas Flow." In ASME 2004 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/icef2004-0968.

Full text
Abstract:
A three-dimensional (3D) model for piston ring-pack dynamics and blow-by gas flow was developed to enable more in-depth analyses of the ring-pack performance. This model predicts the 3D dynamic behavior of compression rings and twin-land oil control ring due to the ring’s non-axisymmetric properties, bore distortion and piston secondary motion. Finite element beam theory is used for ring structure calculation. Gas flows along the axial and circumferential directions of the power cylinder system are resolved simultaneously with the ring dynamics. The model was applied to a heavy-duty diesel engine. Particular emphasis was placed on the dynamics of keystone type of top ring, and the stability of the second ring with a twist chamfer and twin-land oil control ring under the influence of piston secondary motion. The variations of the gas pressure and ring dynamic behavior along the circumference are discussed.
APA, Harvard, Vancouver, ISO, and other styles
3

Bieneman, Jason. "Lower Compression Ring and Oil Control Ring Changes for Modern Diesel Engines." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19175.

Full text
Abstract:
The operating environment for piston rings in modern diesel engines continues to become more severe. Engine manufacturers are not only making changes to the engine to meet the government mandated emissions standards, but at the same time they are increasing both engine efficiencies and specific power levels. In order to meet these performance demands, Peak Cylinder Pressures (PCP) are increasing and piston compression heights are being reduced. These changes require significant upgrades to the Power Cylinder Unit (PCU), including piston and piston ring pack, as historic solutions no longer provide the robustness required for the next generation high output diesel engines. Much attention has already been paid to improving top compression ring technology [1]. This paper will instead focus on how the lower compression ring and oil control ring are impacted by these increasing demands; as well as how design changes to these rings can help the engine manufacturers meet their performance goals. Changes to ring base material, ring face coatings, and running surface geometries will be explained along with a brief discussion about the influence of the ring’s boundary conditions and the changes that are simultaneously being made to surrounding components. These recommendations will be supported with bench test, simulations using the MIT ring pack code [2], and engine test results using numerous MDD/HDD engines.
APA, Harvard, Vancouver, ISO, and other styles
4

Mingardi, Damiano, Emanuele Fornasiero, Nicola Bianchi, Silverio Bolognani, and Adriano Faggion. "Ring losses evaluation in ringed pole PM motors." In 2013 IEEE International Symposium on Sensorless Control for Electrical Drives and Predictive Control of Electrical Drives and Power Electronics (SLED/PRECEDE). IEEE, 2013. http://dx.doi.org/10.1109/sled-precede.2013.6684514.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

BIRKENMEIER, GARY F., JAE KEOL PARK, and S. TARIQ RIZVI. "RING HULLS OF EXTENSION RINGS." In Proceedings of the 4th China-Japan-Korea International Conference. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701671_0002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Xiong, Daxi, Tian Tian, and Victor Wong. "Transient Heat Transfer of Piston/Rings/Liner System in Diesel Engines." In ASME 2005 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/ices2005-1107.

Full text
Abstract:
In diesel engines, transient heat transfer in the piston/rings/liner system greatly affects the performance of the engine, such as in carbon deposit buildup, microwelding, lubricant degradation, and changing mechanical properties of the materials. The current work aims at studying the local piston/rings/liner transient heat-transfer process by incorporating real time dynamics of the rings in sufficient detail. In the present study, several techniques have been adopted to simulate the transient heat transfer process, with fully-incorporated ring dynamics. These techniques include using the model/submodel approach, local refined mesh approach, and the virtual thermal conductivity approach. The transient temperature and heat flux profiles in the piston and rings are illustrated. The results show that the relative movement of the rings greatly affects the temperature/heat flux distribution and the peak temperature in the top ring. The friction heating between the top ring and the liner is also evaluated. The analysis demonstrates that under some extreme conditions when frictional heating reaches its peak value, some heat flux directs back to enter the ring.
APA, Harvard, Vancouver, ISO, and other styles
7

Stumvoll, Alexander K., and Hans-Peter Kau. "Investigation in the Eccentricity of Spoke Centered Turbomachinery Components." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51066.

Full text
Abstract:
A spoke centered fixing arrangement is a typical design element in gas turbine machinery. It is used to mount two annular components concentrically allowing for free relative movement in radial direction due to different elongations caused by temperature gradients. In most cases the outer part represents the absolute coordinate system the inner ring has to be centered in reference to. Several tab slot combinations are used to provide the desired degree of freedom while guaranteeing the inner ring’s concentrical position. Typically the inner ring is equipped with pins sliding in the opposite lying slots of the outer ring. The arrangement requires at least three tab slot combinations, called spokes, between fixed and floating rings. A typical application is for example an inner air seal ring mounted concentrically to the guide vane ring of a gas turbine. Mountability demands clearance between tab and slot surfaces. Associated manufacturing tolerances lead to a certain eccentricity bandwidth for the floating inner ring. The eccentricity was investigated using commercial statistical tolerance analysis software. Since contact between the two rings is only established at three spokes according to acting forces and geometric proportions influenced by tolerances, a contact definition can’t be made before the actual simulation. Therefore, the software’s functionality had to be extended to allow automatic contact definition according to the above mentioned influences. An adaptable simulation model was developed in order to provide a basis of decision making regarding future spoke design parameters. Based on a typical spoke centering design a parameter study with respect to the number of spokes and with respect to a variation of tab and slot dimension tolerances was accomplished. The parameter study showed that the eccentricity mean value decreases with an increasing number of spokes. The mean value was found to approximate the nominal circumferential gap between tab and slot already at low spoke numbers. Lower mean values are hypothetically possible down to the minimum gap between tab and slot surface pairings. The number of spokes would therefore have to be infinite. The corresponding eccentricity standard deviation was also found to decrease with an increasing number of spokes. The investigation revealed that the eccentricity mean value interestingly also declines at higher spoke numbers with increasing tab and slot dimension tolerances. The standard deviation however increases in that case. This opposed effect may be neutralized, such that the upper limit of the eccentricity bandwidth and therefore the maximum eccentricity remains almost constant while broadening the tolerance bandwidths.
APA, Harvard, Vancouver, ISO, and other styles
8

Yu, Z. Z., and Y. B. Xie. "Study of the Piston System Structure of Advantageous to Low Friction and Economizing Energy." In ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1421.

Full text
Abstract:
There must be an end gap in the piston ring because of the need of mounting and compensation for diameter after the wear of ring. Richardson’ and many author’ studies have showed the effects of the end gap to blowby and oil consumption, especially in the presence of ring or liner wear. This problem has influenced the effective utilization of the fuel energy for many years. Moreover the ring will rotate in the working cycle of engine. Once the end gaps of two compression rings come to the site of superposition, the shortest passage of gas flow is formed and blowby will be increased. The deflection of crankpin and rotation of piston were calculated according to the analytical model based on the torque transmission theory of crankshaft. The positive and negative deflections of crankpin result in the reciprocating rotation of piston in the IC engine working cycle. The peak values of deflection and rotation are in the vicinity of crank angle position of deflagration. Because the clingy moment of compression rings are less than rotational resistance moment in a few section of crank angle, they are unable to keep synchronism with piston and the rotations opposite to piston occur. The rotation angle of the second compression ring is more than that of the first ring. The superposition of the end gaps of two compression rings comes about when they turn to the same angle position. Based on above study, the structure of one compression ring in piston system should be widely used, which is in favor of reduction of friction and engine weight, pushing forward the lightweight process, being useful to the decrease of fuel consumption and emission. The pressure of combustion gas will not remarkably descend in this structure. The problem of ring suspension and pressure release in the first ring land can be resolved. Two types of rings with complete seal and economizing energy design are showed for the structure of one ring, which will also avoid the increase of end gap after the rings are worn.
APA, Harvard, Vancouver, ISO, and other styles
9

Tomanik, Eduardo, and Andre Ferrarese. "Low Friction Ring Pack for Gasoline Engines." In ASME 2006 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/icef2006-1566.

Full text
Abstract:
Lower emissions, reduced friction and low lubricant oil consumption are the main drivers for new gasoline engines. In terms of piston ring pack, the trend is to reduce ring tangential load and width. On the other hand, the main concern is to have proper ring conformability and lube oil control. This work presents the comparison of a baseline ring pack with a low friction pack in terms of friction, blow-by control and lube oil consumption. Besides ring width and tangential load reductions, evaluations of ring materials are also carried out. Narrow compression rings, 1.0 and 0.8 mm, were engine tested. PVD top ring was also tested and showed about 10% friction reduction compared to the usual Gas Nitrided one. 3-piece 1.5 mm oil rings were compared with the usual 2.0 mm ones. Being more flexible, the narrower oil rings can have same conformability with reduced tangential load. Friction was measured in the mono-cylinder SI Floating Liner engine at 5 operational conditions. Effect of cylinder roughness on friction is discussed by reciprocating bench tests. Compared with a typical 1.2/1.2/2.0 mm SI ring pack, the proposed 1.0/1.0/1.5 mm pack brought about 28% reduction in ring friction in the tested conditions, which would mean in about 1% of fuel savings in urban use.
APA, Harvard, Vancouver, ISO, and other styles
10

Kerr, Thomas, and Jordan Nielson. "Dynamic Seal Test Rig: O-Ring Leakage and Sliding Friction Measurements." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82221.

Full text
Abstract:
Abstract Sliding seals play a critical role in the dynamic sealing of a wide-variety of machinery applications. There are many type of sliding seals, such as segmented carbon ring, O-ring, or bellows; and are used as sealing elements in hydraulic rod and piston seals, as well as secondary sealing elements in mechanical and dry-gas seals. Motion between the dynamic and static parts of the machine is most often lubricated by the process fluid, and therefore has leakage. This paper presents a new test rig capable of measuring leakage and friction force of annular sliding seals for a range of sealing pressures (0–24.8 MPa), temperatures (20–700 C), gasses, and motion. The rig is capable of large linear motions and high frequency dynamic motion. The large linear motion replicates piston movement or shaft thermal growth and the dynamic excitation matches the typical vibration response from a spinning shaft. Currently, there is little available information in the literature on the leakage performance of dynamic O-rings at high pressures, especially for gas sealing. The paper presents experimental results from two different material, 150 mm diameter, O-rings at sealing pressures up to 70 bar (1,000 psi) in CO2. The rings were tested for large ranges of motion, up to 4 mm. Two different durometer FKM O-rings (70 and 90) were compared to a 70 durometer BUNA O-ring. The softer rings exhibited superior leakage performance, and similar friction forces. The BUNA O-ring performed slightly better at sealing (10–20%) then the similar hardness Viton ring.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Ringel"

1

Ratcliff, Blair N. Imaging rings in ring imaging Cherenkov counters. Office of Scientific and Technical Information (OSTI), November 2002. http://dx.doi.org/10.2172/808694.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sikora, Joel. Technical Assistance for RingIR Aerosol Penetration Study with RingIR. Office of Scientific and Technical Information (OSTI), April 2021. http://dx.doi.org/10.2172/1777072.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Glen, Andrew, and Cathryn Siegrist. RingIR AG-4000 Testing. Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1764659.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Mareze, Paulo Henrique, Ranny L. X. N. Michalski, Olavo M. Silva, and William D'Andrea Fonseca. Resenhas de livros. William D’Andrea Fonseca, July 2020. http://dx.doi.org/10.55753/aev.v35e52.43.

Full text
Abstract:
Nesta edição da revista inauguramos a seção de resenhas de livros (ou book reviews). A ideia é trazer de forma resumida o conteúdo de livros clássicos e novidades — nos assuntos relacionados com as diversas ciências que envolvem acústica e vibrações. Além disso, informações interessantes acerca dos autores serão geralmente acompanhadas, trazendo um pouco mais de contexto sobre as obras. Os livros resenhados foram: Physical Approach to Engineering Acoustics (Ronald N. Miles), Environmental and Architectural Acoustics (Z. Maekawa, J. H. Rindel e P. Lord), Acoustics: An Introduction to Its Physical Principles and Applications (Allan D. Pierce) e Fundamentals of Spherical Array Processing (Boaz Rafaely).
APA, Harvard, Vancouver, ISO, and other styles
5

Evenchick, C. A., and A. F. Embry. Geology, Ellef Ringnes Island north, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/291565.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Evenchick, C. A., and A. F. Embry. Geology, Ellef Ringnes Island south, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/291566.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Tepikian, S., M. Blaskiewicz, C. Montag, and S. Peggs. An electron storage ring proposal for the Ring-Ring eRHIC project. Office of Scientific and Technical Information (OSTI), February 2016. http://dx.doi.org/10.2172/1240706.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Sikivie, P. Caustic rings of dark matter. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/484584.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Greenly, John, B. Ion Rings for Magnetic Fusion. Office of Scientific and Technical Information (OSTI), July 2005. http://dx.doi.org/10.2172/862052.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Patterson, C. W. Resonance capture and Saturn's rings. Office of Scientific and Technical Information (OSTI), May 1986. http://dx.doi.org/10.2172/5797020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Ringel' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography