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ONISHI, TATSUMI

doi:10.2324/gomu.75.268

Cited by 11 publications

(4 citation statements)

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“…Therefore, improved heat resistance is becoming an important requirement for these rubber products. 4,5 To realize these goals, attention has turned towards natural polyisoprenoids. This is a genetic name for polymers derived from plants such as trees and mushroom and are made up of isoprene unit (C 5 H 8 ).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of hydrogenated natural rubber

Inoue

Nishio

2006

J of Applied Polymer Sci

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A series of hydrogenated natural rubbers, HNRs, were prepared by homogenous hydrogenation using H 2 gas with a rhodium catalyst (chlorotris(triphenylphosphine)rhodium) in toluene. The HNRs were linear polymers with molecular weights greater than 800,000. These rubbers were vulcanized using sulfur and peroxide compounds. Vulcanized 100% HNR has a low glass transition temperature (T g ¼ À438C) and excellent abrasion resistance, and is resistant to oxidation and ozonolysis ageing.

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Section: Introductionmentioning

confidence: 99%

Synthesis and properties of hydrogenated natural rubber

Inoue

Nishio

2006

J of Applied Polymer Sci

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“…The overlap of an arbitrary operator is calculated according to the generalized Wick theorem [23,24]; for example, for the two-body interaction,…”

Section: A Norm Overlap Contractions and Generalized Wick Theoremmentioning

confidence: 99%

“…Therefore an efficient method to perform the projection is crucial. The basic ingredient of the projection is the overlap of operators between the product-type meanfield wave functions, based on the generalized Wick theorem [23,24]. For evaluation of such overlaps many matrix operations composed of the multiplication, inverse and determinant, are necessary, and so the dimension of matrices is the most crucial factor.…”

Section: Introductionmentioning

confidence: 99%

Efficient Method to Perform Quantum Number Projection and Configuration Mixing for Most General Mean-Field States

Tagami

Shimizu

2012

Progress of Theoretical Physics

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Combining several techniques, we propose an efficient and numerically reliable method to perform the quantum number projection and configuration mixing for most general meanfield states, i.e., the Hartree-Fock-Bogoliubov (HFB) type product states without symmetry restrictions. As for the example of calculations, we show the results of the simultaneous parity, number and angular-momentum projection from HFB type states generated from the cranked Woods-Saxon mean-field with a very large basis that is composed of N max = 20 spherical harmonic oscillator shells. that all the states connected by the symmetry operation, e.g., rotation of the system, are degenerate. Superposition of all these degenerate states gives a better quantum mechanical description in the variational sense, as it is clear in the formulation of the generator coordinate method (GCM). Since the symmetry requires the specific form of weight functions for superposition, the procedure restores the symmetry at the same time, i.e., projects out the states with good quantum numbers.The most important symmetry-breaking in nuclear structure is the spatial deformation, e.g., the quadrupole shape, so that the projection of the angular momentum is necessary to obtain the eigenstates of the angular momentum operators, especially for calculating the electromagnetic transition probabilities. There is a long history in the angular momentum projection calculations. Except for some special calculations intended for very light nuclei, the general framework of the projection from the (HFB-like) general product-type mean-field wave functions has been developed by Hara and his collaborators in Refs. 9)-11), where the calculation is restricted to the axially symmetric shape, but extended to the triaxially deformed and cranked (for high spins) cases in Ref. 12) (see also the review paper, 13) and a more recent application 14) ). Based on the angular momentum projection, the variation after projection calculations from general mean-field states have also been performed for the G-matrix based realistic interactions (see e.g. Refs. 15) and 16)). However, relatively small model spaces are used in these works, e.g., the two or three harmonic oscillator shells. Recently, the angular momentum projection with much larger space has been attempted with restriction of axially symmetry, intending to employ the Skyrme (or more general) energy functional, 17) where the GCM calculation with respect to the quadrupole deformed coordinates on top of it is performed (see also Ref. 18) for the similar type calculation with the finite range Gogny interaction). The restriction of axial symmetry has been lifted in more recent works for the Skyrme, 19) the relativistic mean-field, 20), 21) and the Gogny 22) approaches, although still the time-reversal invariance (no-cranking) and the D 2 symmetry of deformation are imposed in such calculations.In this paper, we discuss an efficient method of general quantum number projection, i.e., rather technical aspect of projection. We intend to perform the...

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“…Rubber products that are used in the engine compartment now operate in high‐temperature conditions. Therefore, improved heat resistance is becoming an important requirement for these rubber products 4, 5…”

Section: Introductionmentioning

confidence: 99%

Informed consent for pediatric phase 1 cancer trials: Physicians' perspectives

Yap

Yamokoski

Hizlan

et al. 2010

Cancer

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BACKGROUND. This study was conducted to gather pediatric oncologists' opinions about and suggestions for improvement of informed consent (IC) in pediatric phase 1 cancer trials. METHODS. A questionnaire designed to elicit perspectives was distributed to 146 physicians at 6 participating institutions. A total of 103 completed surveys were returned for a 71% response rate. RESULTS. Pediatric oncologists believe providing information so families can decide about phase 1 study entry is the most important goal of the IC process (ICP). The majority of physicians (64%) report that they describe the phase 1 study without any attempt to influence parents' decisions. Several answers provided by physicians were associated with their gender and prior IC training. Male physicians were significantly more likely to endorse the no-attempt-to-influence approach, whereas female physicians were more likely to suggest to parents that other children will benefit from what is learned in phase 1 studies.Responses to an open-ended question provided 63 suggestions for improvement of the ICP, including document and training changes and tools to enhance physician-family communication. CONCLUSIONS. Pediatric oncologists tended to present phase 1 trials as an option rather than a strong recommendation and were reluctant to influence decisions of families about these studies. They believe most but not all parents understand key concepts involved in consent to this type of research, and had ample suggestions for how to improve the ICP. Future research and education efforts around this ethically challenging topic were warranted. Cancer 2010;116:3244

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Cited by 11 publications

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Synthesis and properties of hydrogenated natural rubber

Synthesis and properties of hydrogenated natural rubber

Efficient Method to Perform Quantum Number Projection and Configuration Mixing for Most General Mean-Field States

Informed consent for pediatric phase 1 cancer trials: Physicians' perspectives

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