Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866065
B.V. Shatalov, V. Yurkevich
The problem of the robust digital controller design to solve a tracking problem for robotic manipulators is studied. The design method based on the formation of two-time-scale motions in the closed-loop system is used. It has been shown that if a sufficient time-scale separation between the fast and slow modes in the discussed closed-loop system and stability of fast modes are provided then slow modes have the desired form and thus the output transient performance indices are insensitive to parameter variations of the robotic manipulator. Numerical simulations of the two-link robotic manipulator are presented.
{"title":"Robust digital controller design for robot manipulator","authors":"B.V. Shatalov, V. Yurkevich","doi":"10.1109/KORUS.2000.866065","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866065","url":null,"abstract":"The problem of the robust digital controller design to solve a tracking problem for robotic manipulators is studied. The design method based on the formation of two-time-scale motions in the closed-loop system is used. It has been shown that if a sufficient time-scale separation between the fast and slow modes in the discussed closed-loop system and stability of fast modes are provided then slow modes have the desired form and thus the output transient performance indices are insensitive to parameter variations of the robotic manipulator. Numerical simulations of the two-link robotic manipulator are presented.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76995421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865961
A. Dulzon, V. Gorbatenko
Inhomogeneity of thunderstorm activity is formed against the background of the same synoptically processes. Even within dozens of miles an average number of thunderstorm days and thunderstorm hours can be changed by 1.5-2 times. The authors focus on the spotty spatial distribution of thunderstorm activity in the regions with fairly smooth relief. Analysis of influence of different factors of atmosphere-lithosphere system on irregularity of a spatial distribution of thunder activity was carried out for two regions with different physical and geographical situation and climate: Siberia and Kazakhstan. For revealing the causes of an irregularity of thunder activity in space the analysis of influence of the following factors upon thunder activity was done by the authors: geographical situation of a region as characteristics of remoteness from poles and oceans, orographical peculiarities in a radius of survey of a meteoobserver, air temperature and resiliency of water steam, temperature and humidity characteristics of an underlying surface, quantities of geographical fields anomalies in a region of observation. Irregularity of temperature and humidity condition of underlying surface and orograpy are the most important factors, influencing thunder activity in both regions.
{"title":"Influence of underlying surface on thunderstorm activity","authors":"A. Dulzon, V. Gorbatenko","doi":"10.1109/KORUS.2000.865961","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865961","url":null,"abstract":"Inhomogeneity of thunderstorm activity is formed against the background of the same synoptically processes. Even within dozens of miles an average number of thunderstorm days and thunderstorm hours can be changed by 1.5-2 times. The authors focus on the spotty spatial distribution of thunderstorm activity in the regions with fairly smooth relief. Analysis of influence of different factors of atmosphere-lithosphere system on irregularity of a spatial distribution of thunder activity was carried out for two regions with different physical and geographical situation and climate: Siberia and Kazakhstan. For revealing the causes of an irregularity of thunder activity in space the analysis of influence of the following factors upon thunder activity was done by the authors: geographical situation of a region as characteristics of remoteness from poles and oceans, orographical peculiarities in a radius of survey of a meteoobserver, air temperature and resiliency of water steam, temperature and humidity characteristics of an underlying surface, quantities of geographical fields anomalies in a region of observation. Irregularity of temperature and humidity condition of underlying surface and orograpy are the most important factors, influencing thunder activity in both regions.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75668323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865962
S. Ju, Byung-Sam Kim, Sang-Kyu Park
Seong-A Ju', Byung-Sam Kun', and Sang-Kyu Park2 Dept. of Biological Science, University of Ulsan, San-29 Moogu-2 Dong, Namgu, Ulsan 680-749, Korea and 2College of Medicine, University of Ulsan, Ulsan 682-060, Korea Tel: +82(52)2592393, Fax: +82(52)2591694 E-mail: Sang@uuh.ulsan.kr Abstract Mononuclear phagocytes play a central role in the host defense against infections. We report that synthetic novel peptide, WKYMVm which is In vivo tests, WKYMVm increase killing activities of monocytes against S. aureus. Rats were preinfected with S. aureus and treated with WKYMVm. The number of bacteria remaining on blood of WKYMVm-treated rats was rapidly decreased compare with control group. In vitro cell cultures, WKYMVm increase bactericidal and fungicidal activities of monocytes derived from adult human peripheral blood and neonatal cord blood. 1
{"title":"Stimulation of bactericidal activity of umbilical cord blood monocytes by immunoactivating peptide","authors":"S. Ju, Byung-Sam Kim, Sang-Kyu Park","doi":"10.1109/KORUS.2000.865962","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865962","url":null,"abstract":"Seong-A Ju', Byung-Sam Kun', and Sang-Kyu Park2 Dept. of Biological Science, University of Ulsan, San-29 Moogu-2 Dong, Namgu, Ulsan 680-749, Korea and 2College of Medicine, University of Ulsan, Ulsan 682-060, Korea Tel: +82(52)2592393, Fax: +82(52)2591694 E-mail: Sang@uuh.ulsan.kr Abstract Mononuclear phagocytes play a central role in the host defense against infections. We report that synthetic novel peptide, WKYMVm which is In vivo tests, WKYMVm increase killing activities of monocytes against S. aureus. Rats were preinfected with S. aureus and treated with WKYMVm. The number of bacteria remaining on blood of WKYMVm-treated rats was rapidly decreased compare with control group. In vitro cell cultures, WKYMVm increase bactericidal and fungicidal activities of monocytes derived from adult human peripheral blood and neonatal cord blood. 1","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74467708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866107
O. Khasanov, Jae‐Shin Lee, Y. Pokholkov, E. Dvilis, V. Sokolov, B. An
The properties of green compacts and ceramics from ZrO/sub 2/-Y/sub 2/O/sub 3/ nanopowder compacted under ultrasonic action (power of 0.5; 1; 2; 3 kW) were studied. The shape factor of the green compacts (the ratio of height to diameter) was h/D=0.05 and 0.37. Phase constitution, grain structure, density and shrinkage, of ceramics sintered at 1650/spl deg/C from the green compacts with different h/D, were investigated. The possibility for improvement of mechanical properties of advanced ceramics by using optimum regimes of ultrasonic compaction was shown.
{"title":"Influence of the shape factor on efficiency of the green compact ultrasonic compacting and properties of sintered zirconia ceramics","authors":"O. Khasanov, Jae‐Shin Lee, Y. Pokholkov, E. Dvilis, V. Sokolov, B. An","doi":"10.1109/KORUS.2000.866107","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866107","url":null,"abstract":"The properties of green compacts and ceramics from ZrO/sub 2/-Y/sub 2/O/sub 3/ nanopowder compacted under ultrasonic action (power of 0.5; 1; 2; 3 kW) were studied. The shape factor of the green compacts (the ratio of height to diameter) was h/D=0.05 and 0.37. Phase constitution, grain structure, density and shrinkage, of ceramics sintered at 1650/spl deg/C from the green compacts with different h/D, were investigated. The possibility for improvement of mechanical properties of advanced ceramics by using optimum regimes of ultrasonic compaction was shown.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72710220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866105
Y. Park, B. Park, Se-Hyun Ko
In-situ intermetallic matrix composites were fabricated by the MA-PDS process. The matrix was Fe-28 at.%Al and in-situ reinforcements were TiC and TiB/sub 2/. Mechanical alloying was carried out using a vibratory mill. For the TiC reinforced composites, milling time was systematically changed from 1 to 400 hours to observe the effect of milling parameters. For the TiB/sub 2/ reinforced composites, volume fraction of reinforcements was systematically changed from 0 to 25 at.%. Mechanically alloyed powders were sintered in the plasma discharge sintering system. Fe/sub 3/Al matrix and in-situ reinforcements, TiC and TiB particles, were successfully synthesized by in-situ process using MA-PDS.
{"title":"In-situ intermetallic matrix composites fabricated by MA-PDS process","authors":"Y. Park, B. Park, Se-Hyun Ko","doi":"10.1109/KORUS.2000.866105","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866105","url":null,"abstract":"In-situ intermetallic matrix composites were fabricated by the MA-PDS process. The matrix was Fe-28 at.%Al and in-situ reinforcements were TiC and TiB/sub 2/. Mechanical alloying was carried out using a vibratory mill. For the TiC reinforced composites, milling time was systematically changed from 1 to 400 hours to observe the effect of milling parameters. For the TiB/sub 2/ reinforced composites, volume fraction of reinforcements was systematically changed from 0 to 25 at.%. Mechanically alloyed powders were sintered in the plasma discharge sintering system. Fe/sub 3/Al matrix and in-situ reinforcements, TiC and TiB particles, were successfully synthesized by in-situ process using MA-PDS.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81996530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866108
A. Savitskii, A. Tabachenko, Young-Soon Kwon, Ji-soon Kim, Joon-Oh Bae, J. Moon
The dependencies of densification of W-Fe, Ti-Cr and Cu-Cr compacts, during solid state sintering, on the mixture composition, have been investigated. It was shown that ideas on the existence of only S- and V-shaped curves for concentration dependencies of the densification value, as a result of solid phase sintering, were valid. These curve shapes can be explained on the basis of diffusion interaction of components, applying the multiparticle model of a two-component compact.
{"title":"Concentration dependence of volume changes during sintering of binary systems","authors":"A. Savitskii, A. Tabachenko, Young-Soon Kwon, Ji-soon Kim, Joon-Oh Bae, J. Moon","doi":"10.1109/KORUS.2000.866108","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866108","url":null,"abstract":"The dependencies of densification of W-Fe, Ti-Cr and Cu-Cr compacts, during solid state sintering, on the mixture composition, have been investigated. It was shown that ideas on the existence of only S- and V-shaped curves for concentration dependencies of the densification value, as a result of solid phase sintering, were valid. These curve shapes can be explained on the basis of diffusion interaction of components, applying the multiparticle model of a two-component compact.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82186279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.866059
S. Arimoto
Concerns the skilled motions of a multifingered hand with soft fingertips in dexterous tasks, based on human ability. As an elementary example, dynamics of punching an object by means of two multi-DOF robot fingers with soft and deformable tips are derived and analyzed. It is shown that passivity analysis leads to effective design of a feedback control signal that realizes dynamic stable pinching, regardless of a complicated nonlinear structure of motion equation of the overall system in which extra terms of Lagrange's multipliers arise for holonomic constraints of tight area-contacts between finger-tips and object surfaces. It is shown that a principle of linear superposition is applicable to design of additional feedback signals for controlling both the posture (rotational angle) and the position (some of task coordinates of the mass center) of the object under the condition of unique stationary resolution of the controlled position-state variables. It is finally claimed that complexity of learning such an over-all skilled motion of pinching an object stably and controlling it at a prescribed posture and position can be drastically reduced from exponential order to linear order of the sum of complexities of learning each resolved from exponential order to linear order of the sum of complexities of learning each resolver motion separately, correspondingly to 1) stable pinching, 2) specification of the rotational angle for the object, and 3) that of some of position coordinates.
{"title":"Principle of superposition in design of feedback control signals for dexterous multi-fingered robot hands","authors":"S. Arimoto","doi":"10.1109/KORUS.2000.866059","DOIUrl":"https://doi.org/10.1109/KORUS.2000.866059","url":null,"abstract":"Concerns the skilled motions of a multifingered hand with soft fingertips in dexterous tasks, based on human ability. As an elementary example, dynamics of punching an object by means of two multi-DOF robot fingers with soft and deformable tips are derived and analyzed. It is shown that passivity analysis leads to effective design of a feedback control signal that realizes dynamic stable pinching, regardless of a complicated nonlinear structure of motion equation of the overall system in which extra terms of Lagrange's multipliers arise for holonomic constraints of tight area-contacts between finger-tips and object surfaces. It is shown that a principle of linear superposition is applicable to design of additional feedback signals for controlling both the posture (rotational angle) and the position (some of task coordinates of the mass center) of the object under the condition of unique stationary resolution of the controlled position-state variables. It is finally claimed that complexity of learning such an over-all skilled motion of pinching an object stably and controlling it at a prescribed posture and position can be drastically reduced from exponential order to linear order of the sum of complexities of learning each resolved from exponential order to linear order of the sum of complexities of learning each resolver motion separately, correspondingly to 1) stable pinching, 2) specification of the rotational angle for the object, and 3) that of some of position coordinates.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82383277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865971
Larisa Cherednichenko
The comparative analysis of traditional one-stage industrial technologies of oxidation hydrocarbon wastes with exhausting carbon dioxide (CO,) and new wastes processing electrotecnologies with deriving synthesis-gas (50% [CO], 50% [&I) is considered. In a base of electrotechnologies optimization of hydrocarbon waste raw materials processing the solutions of ecological and power problems are founded in which ones the wastes are treated as renewable power raw materials. The minimal hazardous influence on environment including essential reducing of specific exhausted gases mainly carbon dioxide per power unit are taken as a priority point. Additionally, new electrotechnologies in compare with traditional technologies has allowed to reduce approximately 7 times the amount the total exhausted gases being generated in a working volume of furnace. The excluding from technology process the oxidizing stage has principally changed the design of gas filter and has allowed to quench the exhausted gases. The developed electrotechnology allows to extract all potential energy being contained in a wastes and transform it into power product: the synthesis-gas with specific combustion heat of order 13 MJ/m3 and
{"title":"Ecologically harmless electrotechnologies for municipal and industrial wastes processing","authors":"Larisa Cherednichenko","doi":"10.1109/KORUS.2000.865971","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865971","url":null,"abstract":"The comparative analysis of traditional one-stage industrial technologies of oxidation hydrocarbon wastes with exhausting carbon dioxide (CO,) and new wastes processing electrotecnologies with deriving synthesis-gas (50% [CO], 50% [&I) is considered. In a base of electrotechnologies optimization of hydrocarbon waste raw materials processing the solutions of ecological and power problems are founded in which ones the wastes are treated as renewable power raw materials. The minimal hazardous influence on environment including essential reducing of specific exhausted gases mainly carbon dioxide per power unit are taken as a priority point. Additionally, new electrotechnologies in compare with traditional technologies has allowed to reduce approximately 7 times the amount the total exhausted gases being generated in a working volume of furnace. The excluding from technology process the oxidizing stage has principally changed the design of gas filter and has allowed to quench the exhausted gases. The developed electrotechnology allows to extract all potential energy being contained in a wastes and transform it into power product: the synthesis-gas with specific combustion heat of order 13 MJ/m3 and","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80318170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865933
O. Kibis
In any 2D electron system with asymmetric quantizing potential in the presence of a magnetic field parallel to the 2D plane, different interactions between the electron system and any phonons having mutually opposite directions of wave vectors (anisotropic interaction) appear, which leads to the emergence of a new unusual thermomagnetic effect: the electromotive force for homogeneous heating of the electron system appears. This universal phenomenon is analyzed for the case of anisotropic interaction between electrons and piezoelectric phonons in GaAs-GaAlAs heterojunction. The consequence of this anisotropic interaction is an anomalous temperature dependence of the thermomagnetic effect at low temperature.
{"title":"Anisotropic interaction between electrons and piezoelectric phonons in semiconductor heterojunctions in magnetic field","authors":"O. Kibis","doi":"10.1109/KORUS.2000.865933","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865933","url":null,"abstract":"In any 2D electron system with asymmetric quantizing potential in the presence of a magnetic field parallel to the 2D plane, different interactions between the electron system and any phonons having mutually opposite directions of wave vectors (anisotropic interaction) appear, which leads to the emergence of a new unusual thermomagnetic effect: the electromotive force for homogeneous heating of the electron system appears. This universal phenomenon is analyzed for the case of anisotropic interaction between electrons and piezoelectric phonons in GaAs-GaAlAs heterojunction. The consequence of this anisotropic interaction is an anomalous temperature dependence of the thermomagnetic effect at low temperature.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83227785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-06-27DOI: 10.1109/KORUS.2000.865928
Y. Kunashenko, Y. Pivovarov
We consider different generation mechanisms of relativistic positronium (Ps) atoms (positronium atoms moving with relativistic velocity) by high-energy photons and charged particles in aligned crystals. Coherent effect in a crystal leads to sufficient enhancement in Ps yield at certain photon energies. The energy spectrum of singlet and triplet Ps atoms generated by high-energy charged particles penetrating through a crystal contains strong peaks at the certain Ps energies. In addition, we discuss a possible new mechanism of Ps generation via transitions between bound states of a channeled electron (positron) in a crystal. Possible experiments are discussed.
{"title":"Generation of relativistic positronium atoms by high-energy photons and charged particles in aligned crystals","authors":"Y. Kunashenko, Y. Pivovarov","doi":"10.1109/KORUS.2000.865928","DOIUrl":"https://doi.org/10.1109/KORUS.2000.865928","url":null,"abstract":"We consider different generation mechanisms of relativistic positronium (Ps) atoms (positronium atoms moving with relativistic velocity) by high-energy photons and charged particles in aligned crystals. Coherent effect in a crystal leads to sufficient enhancement in Ps yield at certain photon energies. The energy spectrum of singlet and triplet Ps atoms generated by high-energy charged particles penetrating through a crystal contains strong peaks at the certain Ps energies. In addition, we discuss a possible new mechanism of Ps generation via transitions between bound states of a channeled electron (positron) in a crystal. Possible experiments are discussed.","PeriodicalId":20531,"journal":{"name":"Proceedings KORUS 2000. The 4th Korea-Russia International Symposium On Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77788985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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