The Experts below are selected from a list of 33213 Experts worldwide ranked by ideXlab platform
Kohzo Ito - One of the best experts on this subject based on the ideXlab platform.
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Drastic Change of mechanical properties of polyrotaxane bulk aba bab sequence Change depending on ring position
ACS Macro Letters, 2019Co-Authors: Shuntaro Uenuma, Rina Maeda, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, Kohzo ItoAbstract:Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the Drastic c...
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Drastic Change of Mechanical Properties of Polyrotaxane Bulk: ABA–BAB Sequence Change Depending on Ring Position
2019Co-Authors: Shuntaro Uenuma, Rina Maeda, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, Kohzo ItoAbstract:Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the Drastic Change of the macroscopic mechanical properties depending on the ring position of PR in bulk. Poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer was employed as an axis polymer to control the position of β-cyclodextrin (β-CD). To transfer the β-CD positions, hydroxypropyl groups (HPPR) and hydrophobic trimethyl silyl groups (TMS-HPPR), which have hydrophilic and hydrophobic β-CD, respectively, were synthesized. β-CDs in HPPR were localized on a central PPO segment and formed crystal domains. The axis polymer of HPPR could not bridge β-CD crystal domains, resulting in a melt state at high temperature. On the other hand, β-CDs in TMS-HPPR were transferred to both PEO segments and formed crystal domains. The axis polymer in TMS-HPPR could bridge the β-CD crystal domains, resulting in an elastic state even at high temperature. We succeeded in demonstrating the potential ability of PR: the macroscopic mechanical properties of PR can be Changed from a melt state to an elastic one by manipulating the ring positions
Boniface P. T. Fokwa - One of the best experts on this subject based on the ideXlab platform.
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Drastic Change of magnetic interactions and hysteresis through site preferential ru ir substitution in sc2feru5 xirb2
ChemInform, 2014Co-Authors: Martin Hermus, Minghui Yang, Francis J. Disalvo, Daniel Gruener, Boniface P. T. FokwaAbstract:Sc2FeRu5-xIrxB2 (x: 1, 2, 3, 4) are prepared by arc melting of the elements several times under Ar (20 s, 40 A).
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Drastic Change of magnetic interactions and hysteresis through site preferential ru ir substitution in sc2feru5 xirxb2
Chemistry of Materials, 2014Co-Authors: Martin Hermus, Minghui Yang, Francis J. Disalvo, Daniel Gruner, Boniface P. T. FokwaAbstract:The quinary members of the complex boride series Sc2FeRu5–xIrxB2 were synthesized by arc melting the elements and characterized by powder and single-crystal X-ray diffraction as well as metallographic and energy-dispersive X-ray analyses. The use of a 4d/5d mixture allows distinguishing these elements with X-ray diffraction methods, thus enabling the study of site preference and its influence on the magnetic properties.The magnetic measurements reveal several Changes of magnetic ordering within the series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) and finally to metamagnetism (Sc2FeIr5B2). Within the quinary series, the magnetic moments continuously increase with increasing amounts of Ir in one (8j) of two possible Wyckoff sites. The members with x = 2 and 3 represent the first hard magnetic borides of transition metals.
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Drastic Change of Magnetic Interactions and Hysteresis through Site-Preferential Ru/Ir Substitution in Sc2FeRu5–xIrxB2
2014Co-Authors: Martin Hermus, Minghui Yang, Daniel Grüner, Francis J. Disalvo, Boniface P. T. FokwaAbstract:The quinary members of the complex boride series Sc2FeRu5–xIrxB2 were synthesized by arc melting the elements and characterized by powder and single-crystal X-ray diffraction as well as metallographic and energy-dispersive X-ray analyses. The use of a 4d/5d mixture allows distinguishing these elements with X-ray diffraction methods, thus enabling the study of site preference and its influence on the magnetic properties.The magnetic measurements reveal several Changes of magnetic ordering within the series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) and finally to metamagnetism (Sc2FeIr5B2). Within the quinary series, the magnetic moments continuously increase with increasing amounts of Ir in one (8j) of two possible Wyckoff sites. The members with x = 2 and 3 represent the first hard magnetic borides of transition metals
Shuntaro Uenuma - One of the best experts on this subject based on the ideXlab platform.
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Drastic Change of mechanical properties of polyrotaxane bulk aba bab sequence Change depending on ring position
ACS Macro Letters, 2019Co-Authors: Shuntaro Uenuma, Rina Maeda, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, Kohzo ItoAbstract:Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the Drastic c...
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Drastic Change of Mechanical Properties of Polyrotaxane Bulk: ABA–BAB Sequence Change Depending on Ring Position
2019Co-Authors: Shuntaro Uenuma, Rina Maeda, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, Kohzo ItoAbstract:Polyrotaxane (PR), consisting of many ring molecules and an axis polymer, is a typical supramolecular structure with unique topological characteristics. In this study, we demonstrated the Drastic Change of the macroscopic mechanical properties depending on the ring position of PR in bulk. Poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO–PPO–PEO) triblock copolymer was employed as an axis polymer to control the position of β-cyclodextrin (β-CD). To transfer the β-CD positions, hydroxypropyl groups (HPPR) and hydrophobic trimethyl silyl groups (TMS-HPPR), which have hydrophilic and hydrophobic β-CD, respectively, were synthesized. β-CDs in HPPR were localized on a central PPO segment and formed crystal domains. The axis polymer of HPPR could not bridge β-CD crystal domains, resulting in a melt state at high temperature. On the other hand, β-CDs in TMS-HPPR were transferred to both PEO segments and formed crystal domains. The axis polymer in TMS-HPPR could bridge the β-CD crystal domains, resulting in an elastic state even at high temperature. We succeeded in demonstrating the potential ability of PR: the macroscopic mechanical properties of PR can be Changed from a melt state to an elastic one by manipulating the ring positions
Martin Hermus - One of the best experts on this subject based on the ideXlab platform.
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Drastic Change of magnetic interactions and hysteresis through site preferential ru ir substitution in sc2feru5 xirb2
ChemInform, 2014Co-Authors: Martin Hermus, Minghui Yang, Francis J. Disalvo, Daniel Gruener, Boniface P. T. FokwaAbstract:Sc2FeRu5-xIrxB2 (x: 1, 2, 3, 4) are prepared by arc melting of the elements several times under Ar (20 s, 40 A).
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Drastic Change of magnetic interactions and hysteresis through site preferential ru ir substitution in sc2feru5 xirxb2
Chemistry of Materials, 2014Co-Authors: Martin Hermus, Minghui Yang, Francis J. Disalvo, Daniel Gruner, Boniface P. T. FokwaAbstract:The quinary members of the complex boride series Sc2FeRu5–xIrxB2 were synthesized by arc melting the elements and characterized by powder and single-crystal X-ray diffraction as well as metallographic and energy-dispersive X-ray analyses. The use of a 4d/5d mixture allows distinguishing these elements with X-ray diffraction methods, thus enabling the study of site preference and its influence on the magnetic properties.The magnetic measurements reveal several Changes of magnetic ordering within the series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) and finally to metamagnetism (Sc2FeIr5B2). Within the quinary series, the magnetic moments continuously increase with increasing amounts of Ir in one (8j) of two possible Wyckoff sites. The members with x = 2 and 3 represent the first hard magnetic borides of transition metals.
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Drastic Change of Magnetic Interactions and Hysteresis through Site-Preferential Ru/Ir Substitution in Sc2FeRu5–xIrxB2
2014Co-Authors: Martin Hermus, Minghui Yang, Daniel Grüner, Francis J. Disalvo, Boniface P. T. FokwaAbstract:The quinary members of the complex boride series Sc2FeRu5–xIrxB2 were synthesized by arc melting the elements and characterized by powder and single-crystal X-ray diffraction as well as metallographic and energy-dispersive X-ray analyses. The use of a 4d/5d mixture allows distinguishing these elements with X-ray diffraction methods, thus enabling the study of site preference and its influence on the magnetic properties.The magnetic measurements reveal several Changes of magnetic ordering within the series: from antiferromagnetism (Sc2FeRu5B2) to ferromagnetism (Sc2FeRuIr4B2) and finally to metamagnetism (Sc2FeIr5B2). Within the quinary series, the magnetic moments continuously increase with increasing amounts of Ir in one (8j) of two possible Wyckoff sites. The members with x = 2 and 3 represent the first hard magnetic borides of transition metals
Namrata Vaswani - One of the best experts on this subject based on the ideXlab platform.
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the modified cusum algorithm for slow and Drastic Change detection in general hmms with unknown Change parameters
International Conference on Acoustics Speech and Signal Processing, 2005Co-Authors: Namrata VaswaniAbstract:We study the Change detection problem in a general HMM when the Change parameters are unknown and the Change can be slow or Drastic. Drastic Changes can be detected easily using the increase in tracking error or the negative log of observation likelihood (OL). But slow Changes usually get missed. We have proposed in past work a statistic called ELL which works for slow Change detection. Now single time estimates of any statistic can be noisy. Hence we propose a modification of the cumulative sum (CUSUM) algorithm which can be applied to ELL and OL and thus improves both slow and Drastic Change detection performance.
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slow and Drastic Change detection in general hmms using particle filters with unknown Change parameters
2004Co-Authors: Namrata VaswaniAbstract:We study the Change detection problem in general HMMs, when Change parameters are unknown and the Change could be gradual (slow) or sudden (Drastic). Drastic Changes can be detected easily using the increase in tracking error or the negative log of the observation likelihood conditioned on past observations (OL). But slow Changes usually get missed. We propose a statistic for slow Change detection called ELL which is the conditional Expectation of the negative Log Likelihood of the state given past observations. We show asymptotic stability (stability under weaker assumptions) of the errors in approximating the ELL for Changed observations using a particle filter that is optimal for the unChanged system. It is shown that the upper bound on ELL error is an increasing function of the “rate of Change” with increasing derivatives of all orders, and its implications are discussed. We also demonstrate, using the bounds on the errors, the complementary behavior of ELL and OL. Results are shown for simulated examples and for a real abnormal activity detection problem.
