148 results on '"Miwa K"'
Search Results
2. High resolution spectroscopy of 횵 hypernuclei with active fiber target.
- Author
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Harada, Takeshi K., Ebata, K., Gogami, T., Hayakawa, S. H., Honda, R., Ichikawa, Y., Miwa, K., Nagae, T., Nanamura, T., Takahashi, T., Ukai, M., and Yamamoto, T. O.
- Subjects
HIGH resolution spectroscopy ,HYPERFRAGMENTS ,FIELD theory (Physics) ,PHYSICS experiments ,MAGNETIC spectrometer - Abstract
We are planning to carry out a high-resolution spectroscopy of Ξ hypernucleus at the J-PARC K1.8 beamline, which provides a highintensity K
− beam (J-PARC E70 experiment). The high-resolution spectroscopy aims to be realized by introducing a new magnetic spectrometer S-2S and an active fiber target AFT. In this article, the role of the AFT in this experiment and its development status are described. [ABSTRACT FROM AUTHOR]- Published
- 2022
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3. X ray spectroscopy on 횵− atoms (J-PARC E03, E07 and future).
- Author
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Yamamoto, Takeshi. O., Fujita, M., Gogami, T., Harada, T. K., Hayakawa, S. H., Hosomi, K., Ichikawa, Y., Ishikawa, Y., Kamada, K., Kanauchi, H., Koike, T., Miwa, K., Nagae, T., Oura, F., Takahashi, T., Tamura, H., Tanida, K., and Ukai, M.
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X-ray spectroscopy ,ATOMS ,HADRONS ,PHYSICS experiments ,HYPERONS - Abstract
X-ray spectroscopy of hadronic atoms is a powerful method to study strong interaction between hadrons and nuclei. At J-PARC, we have conducted two experiments, J-PARC E07 and E03, for hadronic atoms with a doubly strange hyperon, Ξ
− , aiming at the world-first detection of their X-rays. The first measurement is performed as a byproduct of J-PARC E07 experiment with the hybrid emulsion technique. The second one, J-PARC E03, is a dedicated experiment for detection of Ξ− Fe atom X rays. The preliminary results and the present status of E07 and E03 are shown in this article. Future prospects of Ξ− -atomic X-ray spectroscopy are also discussed. A new measurement has been proposed for detecting Ξ− C atom X rays, where a novel Ξ− tracking method will be applied to realize an improved signal to noise ratio. [ABSTRACT FROM AUTHOR]- Published
- 2022
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4. Current State of Fetal Heart Disease Counseling and Training: Room for Improvement?: Endorsed by the Fetal Heart Society.
- Author
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Keelan, Jenna A., Moon Grady, Anita J., Arya, Bhawna, Donofrio, Mary T., Schidlow, David N., Tacy, Theresa A., Stern, Kenan W. D., and Geiger, Miwa K.
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FETAL heart ,FETAL diseases ,HEART diseases ,COUNSELING - Abstract
We sought to describe the fellowship experiences and current practice habits of pediatric cardiologists who counsel patients with fetal heart disease (FHD) and to identify fellowship experiences related to FHD counseling perceived as valuable by respondents as well as opportunities for improvement. A cross-sectional survey of attending pediatric cardiologists who care for patients with FHD was performed. The respondents' demographics, fellowship experiences related to FHD counseling, reflections on fellowship training, and current practice habits were collected. The Fetal Heart Society endorsed this survey. There were 164 survey responses. 56% of respondents did not have 4th-year subspecialty training in fetal cardiology. Observing and performing FHD counseling were the most commonly used methods of training, with the highest perceived effectiveness. The number of counseling sessions observed and performed correlated moderately with confidence in FHD counseling skills at fellowship graduation. Extracardiac pathology and neurodevelopment were the least frequently addressed topics in fellowship training and in current practice. Fewer than 50% of respondents received formal education and feedback in counseling techniques during fellowship training. A significant proportion of practicing pediatric cardiologists provide FHD counseling with only standard categorical training. This highlights the potential importance of expanding FHD counseling education into categorical fellowship curricula. We suggest increasing opportunities for fellows to perform FHD counseling and receive feedback as this is a valued and beneficial experience during training. A formalized curriculum including extracardiac pathology and neurodevelopment and the use of evidence-based workshops in counseling techniques may address identified gaps in fellowship education. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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5. Measurement of differential cross sections for Σ+p elastic scattering in the momentum range 0.44–0.80 GeV/c.
- Author
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Nanamura, T, Miwa, K, Ahn, J K, Akazawa, Y, Aramaki, T, Ashikaga, S, Callier, S, Chiga, N, Choi, S W, Ekawa, H, Evtoukhovitch, P, Fujioka, N, Fujita, M, Gogami, T, Harada, T K, Hasegawa, S, Hayakawa, S H, Honda, R, Hoshino, S, and Hosomi, K
- Subjects
DIFFERENTIAL cross sections ,ELASTIC scattering ,QUARK models - Abstract
We performed a novel Σ
+ p scattering experiment at the J-PARC Hadron Experimental Facility. Approximately 2400 Σ+ p elastic scattering events were identified from 4.9 × 107 tagged Σ+ particles in the Σ+ momentum range 0.44–0.80 GeV/ c. The differential cross sections of the Σ+ p elastic scattering were derived with much better precision than in previous experiments. The obtained differential cross sections were approximately 2 mb/sr or less, which were not as large as those predicted by the fss2 and FSS models based on the quark cluster model in the short-range region. By performing phase-shift analyses for the obtained differential cross sections, we experimentally derived the phase shifts of the3 S1 and1 P1 channels for the first time. The phase shift of the3 S1 channel, where a large repulsive core was predicted owing to the Pauli effect between quarks, was evaluated as |$20^\circ \lt |\delta _{^3S_1}|\lt 35^\circ$|. If the sign of |$\delta _{^3S_1}$| is assumed to be negative, the interaction in this channel is moderately repulsive, as the Nijmegen extended-sort-core models predicted. [ABSTRACT FROM AUTHOR]- Published
- 2022
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6. Hyperon–Proton Scattering Experiment and Recent Progress of Strangeness Nuclear Physics at J-PARC.
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Miwa, K.
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STRANGE particles ,DIFFERENTIAL cross sections ,ELASTIC scattering ,STATISTICAL errors ,BARYONS - Abstract
High intensity secondary beam in J-PARC enables us to perform strangeness nuclear physics programs in order to investigate the baryon–baryon (BB) interactions between the octet baryons. As one of the experiments at the K1.8 beam line, a high statistics Σ p scattering experiment has been performed. The differential cross sections of the Σ - p elastic scattering for the momentum region from 470 to 850 MeV/c have been successfully measured with an improved accuracy. The statistical error of 10% level was achieved with a fine angular step of d cos θ = 0.1 by identifying the largest statistics of about 4500 Σ - p elastic scattering events from 1.72 × 10 7 Σ - particles. The differential cross sections show clear forward peaking structure and the forward and backward ratio is large particularly in the higher momentum regions. The accurate data will impose a strong constraint on the theoretical models of the BB interactions. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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7. Preparation status of missing-mass spectroscopy for 횵 hypernuclei with S-2S magnetic spectrometer.
- Author
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Ebata, Kengo, Fujioka, H., Fujita, M., Gogami, T., Harada, T. K., Hayakawa, S. H., Honda, R., Ichikawa, Y., Kamada, K., Kobori, T., Miwa, K., Nagae, T., Nanamura, T., Negishi, R., Oura, F., Sakao, T., Son, C., Takahashi, T., Takahashi, H., and Tamura, H.
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MASS spectrometry ,HYPERFRAGMENTS ,MAGNETIC spectrometer ,HADRONS ,NUCLEAR reactions - Abstract
J-PARC E70 experiment measures the missing-mass of Ξ hypernuclei (
12 Ξ Be) in Hadron Experimental Facility at J-PARC. We aim to reach the best missing-mass resolution of 2 MeV/c2 in FWHM with a new magnetic spectrometer S-2S. The high-resolution spectroscopy of Ξ hypernuclei will play an important role to understand the unknown ΞN interaction. The experiment will start at the beginning of 2023. This article presents the preparation status. [ABSTRACT FROM AUTHOR]- Published
- 2022
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8. The Analysis Status of Σ+p Scattering Events in the J-PARC E40 Experiment.
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Nanamura, T., Miwa, K., Akazawa, Y., Honda, R., Nakada, Y., and Sakao, T.
- Abstract
The J-PARC E40 experiment aims for measuring cross sections of the Σ p scatterings with high statistics by overcoming difficulties of hyperon-nucleon scattering experiment. The physics motivations are to verify the large repulsive force due to quark Pauli effect in the Σ + p interaction and to perform systematic study of the Σ N interaction. Physics data taking was performed at the K1.8 beam line in the J-PARC hadron experimental facility by 2020 June. Σ + particles were produced via the π + p → K + Σ + reaction and their momenta were tagged with spectrometers. Recoil proton of the Σ + p scatterings and proton from the Σ + → p π 0 decay were detected with surrounding detector system CATCH. The Σ + p scattering can be identified by checking the consistency for the recoil proton between the measured energy and the calculated energy from kinematics of the Σ + p scattering. In present analysis, 69M Σ + particles are tagged as the Σ + beam and 4500 Σ + p scattering events are identified. Further analysis to derive the differential cross sections is ongoing. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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9. High Output Cardiovascular Physiology and Outcomes in Fetal Diagnosis of Vein of Galen Malformation.
- Author
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Jhaveri, Simone, Berenstein, Alejandro, Srivastava, Shubhika, Shigematsu, Tomoyoshi, and Geiger, Miwa K.
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MAGNETIC resonance imaging ,FETAL physiology ,VENA cava superior ,VEINS ,RIGHT ventricular dysfunction - Abstract
Vein of Galen aneurysmal malformation (VGAM) is a rare anomaly associated with poor outcomes from high output cardiac failure and neurologic complications. Studies addressing fetal cardiovascular status and outcomes in this population are limited. A single-center retrospective review was conducted on patients with a prenatal diagnosis of VGAM who underwent a fetal echocardiogram between January 2015 and July 2019. Fetal echocardiographic data, brain magnetic resonance imaging (MRI) findings and outcomes were collected. Nine fetuses [median gestational age at echocardiogram 34 (1.1) weeks] were included. All patients had superior vena cava dilation and reversal of diastolic flow in the transverse aortic arch. Median cardiothoracic (CT) ratio was 0.39 (0.09). Right ventricular (RV) and left ventricular (LV) dysfunction was present in 66% and 11% fetuses, respectively. Four out of five patients that underwent postnatal endovascular neurosurgical interventions at our center were alive at follow-up (mean 2.7 years). Of the non-survivors (n = 5), 3 received comfort care because of severe brain damage and died in the neonatal period. Non-survivors more commonly had > mild tricuspid regurgitation (TR) (40% vs. 25%) and > mild RV dilation (60% vs. 25%). Combined cardiac index (CCI) was higher in non-survivors when compared to survivors (672.7 vs. 530.2 ml/kg/min, p = 0.016). Fetuses with significant parenchymal damage on brain MRI tended to have a higher CCI than those without (979.8 vs. 605.0 ml/kg/min, p = 0.047). RV dysfunction, TR and elevated CCI are more commonly seen in non-survivors with VGAM. A higher CCI is seen in those deemed untreatable due to significant parenchymal volume loss. Future multicenter studies are needed to assess for prenatal prediction of outcomes in this high-risk population. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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10. Σp scattering experiment at J-PARC – results of commissioning run –.
- Author
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Miwa, K., Ahn, J. K., Akazawa, Y., Aramaki, T., Ashikaga, S., Callier, S., Chiga, N., Choi, S. W., Ekawa, H., Evtoukhovitch, P., Fujioka, N., Fujita, M., Hasegawa, S., Hayakawa, S., Honda, R., Hoshino, S., Hosomi, K., Ichikawa, M., Ichikawa, Y., and Ieiri, M.
- Subjects
LINEAR accelerators ,FACTORY equipment ,PROTONS ,RUNNING - Abstract
The Σp scattering experiment has just been started at J-PARC this year (2018). We made ”Σ beam factory” a reality where a beam with an intensity of more than 5 × 10
5 Σ− beam per day could be produced by using 20 M/spill π− beam. The CATCH system, which is a dedicated system to detect recoil proton from the Σp scattering, operated stably under the high counting rate, and its successful operation was confirmed by identifying the pp scattering events in J-PARC. In the June beam time, the production run of the Σ− p scattering was carried out for 2 days, which was just 10% of the requested beam time. The remaining beam time of the Σ− p channel and the Σ+ p channel will take place in the spring of 2019. [ABSTRACT FROM AUTHOR]- Published
- 2019
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11. Solidified ionic liquid for high power-output vibrational energy harvesters.
- Author
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Yamada, S., Mitsuya, H., Ono, S., Miwa, K., and Fujita, H.
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- 2015
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12. Dielectric and magnetic characterizations of capacitor structures with an ionic liquid/MgO barrier and a ferromagnetic Pt electrode.
- Author
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Hayakawa, D., Obinata, A., Miwa, K., Ono, S., Hirai, T., Koyama, T., and Chiba, D.
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ELECTRIC double layer ,MAGNETIC properties - Abstract
The dielectric and magnetic properties of electric double layer (EDL) capacitor structures with a perpendicularly magnetized Pt/Co/Pt electrode and an insulating cap layer (MgO) are investigated. An electric field is applied through a mixed ionic liquid/ MgO barrier to the surface of the top Pt layer, at which the magnetic moment is induced by the ferromagnetic proximity effect. The basic dielectric properties of the EDL capacitor are studied by varying the thickness of the MgO cap layer. The results indicate that the capacitance, i.e., the accumulated charge density at the Pt surface, is reduced with increasing the MgO thickness. From the MgO thickness dependence of the capacitance value, the effective dielectric constant of the ionic liquid is evaluated. Almost no electric field effect on the magnetic moment, the coercivity, or the Curie temperature is confirmed in the top Pt layer with the thickness of 1.3 nm, regardless of the presence or absence of the MgO cap layer, whereas the a clear change in the magnetic moment is observed when the top Pt layer is replaced by a Pd layer of 1.7 nm. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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13. Peculiar temperature dependence of electric-field effect on magnetic anisotropy in Co/Pd/MgO system.
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Hibino, Y., Koyama, T., Obinata, A., Hirai, T., Ota, S., Miwa, K., Ono, S., Matsukura, F., Ohno, H., and Chiba, D.
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MAGNETIC anisotropy ,ELECTRIC field integral equations ,ELECTRIC field strength ,MAGNETIC after effect - Abstract
We report on the temperature dependence of the magnetic anisotropy in Co/Pd/MgO system, in which magnetic moment in Pd is induced by the magnetic proximity effect. We demonstrate that the magnetic anisotropy is modulated by applying an electric field to the Pd surface. At temperatures below 100K, we find the nonlinear electric-field dependence of the anisotropy with the sign reversal. We obtain a huge anisotropy modulation efficiency of ∼1600 fJ/V m at 10K. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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14. Interleukin-6, interleukin-6 receptor gene variant, small-vessel disease and incident dementia.
- Author
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Miwa, K., Okazaki, S., Sakaguchi, M., Mochizuki, H., and Kitagawa, K.
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DEMENTIA risk factors ,DEMENTIA research ,INTERLEUKIN-6 ,C-reactive protein ,MAGNETIC resonance imaging of the brain ,PROPORTIONAL hazards models - Abstract
Background and purpose Mixed neurogenerative and vascular dementia has emerged as the leading cause of dementia in the elderly. Inflammation is implicated in atherosclerosis, cerebral small-vessel disease ( SVD) as well as cognitive impairment. However, longitudinal data on the predictive value of circulating inflammatory markers including gene variants and magnetic resonance imaging ( MRI) findings in incident dementia are scarce. It was investigated whether circulating interleukin-6 ( IL-6), C-reactive protein ( CRP) and gene variants increase dementia risk. Methods In a cohort of Japanese participants with vascular risk factors in an observational study from 2001, the association between baseline IL-6, CRP levels, gene variants [interleukin-6 receptor ( IL-6R), rs2228145; IL-6, rs2097677; CRP, rs3093059] and incident all-cause dementia was evaluated. Baseline MRI was used to determine SVD (lacuna, white matter hyperintensities) and atrophy (medial-temporal lobe atrophy, bicaudate ratio). Cox proportional hazards analyses were performed for predictors of dementia, adjusting for age, sex, apolipoprotein Eε4, education, cerebrovascular events, vascular risk factors and MRI findings. Results Of 803 subjects (mean 67.0 ± 8.5 years, males 59%), during a mean of 7.5 ± 3.2 years follow-up, 60 incident dementia patients (Alzheimer's disease 31; vascular dementia 17; mixed-type six; other six) were diagnosed. In multivariable analyses adjusted for age, sex, cerebrovascular events, MRI findings and IL-6R variant (rs2228145), IL-6 levels (relative risk 1.68, P = 0.048) or highest tertile (relative risk 2.38, P = 0.031) for all-cause dementia remained significant. Although subjects with rs2228145 carrier had significantly higher IL-6 levels, a significant association between rs2228145 and dementia was not observed. Conversely, CRP and remaining gene variants were not associated with dementia. Conclusions The deleterious effect of higher IL-6 on dementia remains consistent irrespective of conventional risk factors, MRI findings and IL-6R variant. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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15. Serum high-molecular-weight adiponectin level and incident dementia in patients with vascular risk factors.
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Kitagawa, K., Miwa, K., Okazaki, S., Sakaguchi, M., and Mochizuki, H.
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ADIPONECTIN ,DEMENTIA research ,METABOLIC syndrome ,DISEASE risk factors ,STROKE - Abstract
Background and purpose The involvement of metabolic factors in the development of dementia has received much attention. However, previous studies have yielded conflicting results regarding how blood adipocytokine level impacts cognitive decline and dementia. This study aimed to clarify whether serum high-molecular-weight ( HMW) adiponectin level is related to incident dementia. Methods Data were from 466 patients (mean age 67.8 years, male 57%) - who had normal cognitive function and received brain magnetic resonance imaging - from amongst the 1106 patients in the Osaka Follow-up Study for Carotid Atherosclerosis, Part 2, a prospective cohort study of cardiovascular events and dementia amongst patients with vascular risk factors enrolled between 2001 and 2009. Baseline HMW adiponectin levels were measured using frozen serum. Dementia occurrence was examined in June 2013. Results Serum HMW adiponectin level was 4.33 ± 2.95 μg/ml; the levels were lower in men than in women and negatively correlated with body mass index. During the follow-up period (median 6.9 years), 47 patients had incident dementia including Alzheimer's disease dementia (27), vascular dementia (13), mixed dementia (four), other dementia (three). Risks of dementia in patients with high versus low HMW adiponectin levels were almost identical ( P = 0.689). No association was found between adiponectin levels and Alzheimer's disease dementia or vascular dementia in the whole group or amongst men and women separately. Conclusions This study demonstrated that serum HMW adiponectin level has little association with future dementia. Determination of metabolic factors involved in dementia requires evaluation of other biomarkers or parameters. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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16. Determination of optimal ionic liquid for organic single-crystal field-effect transistors.
- Author
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Ono, S., Miwa, K., and Seki, S.
- Subjects
IONIC liquids ,SINGLE crystals ,FIELD-effect transistors ,FIELD-effect devices ,DIELECTRICS research - Abstract
We investigate organic single-crystal field-effect transistors with various ionic liquids as gate dielectric. We find that the mobility of the field-effect transistors for both p-type and n-type organic semiconductors increases with decreasing total capacitance of the ionic liquid. However, it does not depend on the ion species at the interface between the organic semiconductor and the ionic liquid. By choosing an appropriate ionic liquid, a high carrier mobility of 12.4 cm²/V s in rubrene single crystals (p-type) and 0.13 cm²/V s in 7.7.8.8-Tetracyanoquinodimethane single crystals (n-type) are achieved. This study clarifies the influence of ionic liquids on the device performance of organic field-effect transistors and shows a way to maximize carrier mobility at the solid/liquid interface. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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17. Association between carotid stenosis or lacunar infarction and incident dementia in patients with vascular risk factors.
- Author
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Kitagawa, K., Miwa, K., Yagita, Y., Okazaki, S., Sakaguchi, M., and Mochizuki, H.
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BRAIN imaging ,CAROTID artery stenosis ,DEMENTIA ,INFARCTION ,COHORT analysis ,COGNITIVE ability - Abstract
Background and purpose The association between vascular risk factors and dementia is of interest. Several studies have shown that cerebral small vessel disease ( SVD) is associated with dementia. However, the association between cerebral large vessel disease ( LVD) and dementia has not been thoroughly examined. Methods The Osaka Follow-up Study for Carotid Atherosclerosis, Part 2, was a prospective cohort study of cardiovascular events and dementia in which patients ( n = 1106) with vascular risk factors underwent carotid ultrasound. Of these patients, 600 who had normal cognitive function were included and underwent brain magnetic resonance imaging. The presence of lacunar infarction and carotid stenosis served as markers for SVD and LVD, respectively. Results Amongst 600 patients (mean 68 years, 57% men), 261 (44%) showed lacunar infarction and 94 (16%) showed carotid stenosis. During the follow-up period (median 8.0 years), 57 patients had incident dementia. Patients with carotid stenosis and lacunar infarction were significantly more likely to be diagnosed with dementia (log-rank test, P = 0.037 and P < 0.001, respectively). The association between lacunar infarction and dementia remained significant after adjusting for risk factors including stroke history, apolipoprotein E genotype and years of education (hazard ratio 2.64, 95% confidence interval 1.22-6.09). However, the presence of carotid stenosis was not associated with incident dementia after adjusting for age and sex ( P = 0.477). Conclusions This study demonstrated that carotid stenosis had little association with dementia, but lacunar infarction had a significant association. The impact of SVD on dementia could be much greater than that of LVD. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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18. Short-channel and high-mobility p- and n-type organic single-crystal transistors with air-gap structures.
- Author
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Uno, M., Uemura, T., Miwa, K., Facchetti, A., and Takeya, J.
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- 2012
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19. Experimental plan of Σp scatterings at J-PARC.
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Miwa, K., Honda, R., Matsumoto, Y., Kanda, H., Tamura, H., and Ieiri, M.
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BARYONS ,HYPERONS ,MESONS ,PROTON scattering ,SPECTROMETERS - Abstract
In order to test theoretical frameworks of the baryon-baryon interactions and to confirm the "Pauli effect between quarks" for the first time, we propose an experiment to measure low-energy hyperon proton scattering cross sections in the following channels with high statistics, 1. Σ
- p elastic scattering, 2. Σ- p → Λn inelastic scattering, 3. Σ+ p elastic scattering. According to theoretical models based on quark-gluon picture for the short range part of the baryon-baryon interactions, the Σ+ p channel is expected to have an extremely repulsive core due to the Pauli effect between quarks, which leads a Σ+ p cross section twice as large as that predicted by conventional meson exchange models with a phenomenologically treated short range repulsive core. In addition, measurement of the Σ- p channel where the quark Pauli effect is not effective is also necessary to test the present theoretical models based on meson exchange picture with the flavor SU(3) symmetry. Thus this experiment will provide essential data to test the frameworks of the theoretical models of the baryon-baryon interactions and to investigate the nature of the repulsive core which has not been understood yet. In order to overcome the experimental difficulties in measuring low-energy hyperon proton scattering, we will use a new experimental technique in which a liquid H2 target is used as hyperon production and hyperon scattering targets with a detector system surrounding the LH2 target for detection of a scattered proton and a decay product from a hyperon. The hyperon scattering event is kinematically identified. Because imaging detectors used in past experiments are not employed, high intensity π beam can be used, allowing us to take high statistics data of 100 times more than the previous experiments. We have proposed an experiment of Σp scattering at the K1.8 beam line by utilizing the K1.8 beam line spectrometer and the SKS spectrometer. A high intensity π beams of 2×107 /spill at 1.32 GeV/c and 1.42 GeV/c for the Σ- and Σ+ productions, respectively, are used to produce as many hyperon beam as possible.With 16×106 Σ- beam and 55×106 Σ+ beam around 500 MeV/c which are tagged by the spectrometers, we will detect ~10,000 Σ- p and Σ+ p scattering events and ~6,000 Σ- p → ⋀n inelastic reaction events in 60 days beam time in total. In this proceedings, we will present the experimental plan of the scattering experiment and results of the detailed simulation studies. [ABSTRACT FROM AUTHOR]- Published
- 2012
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20. Experimental plan of Σp scatterings at J-PARC.
- Author
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Miwa, K., Honda, R., Matsumoto, Y., Kanda, H., Tamura, H., and Ieiri, M.
- Subjects
SCATTERING (Physics) ,QUARKS ,HYPERONS ,PROTON scattering ,PROTON decay - Abstract
In order to test theoretical frameworks of the baryon-baryon interactions and to confirm the "Pauli effect between quarks" for the first time, we propose an experiment to measure low-energy hyperon proton scattering cross sections in the following channels with high statistics, 1. Σ
- p elastic scattering, 2. Σ- p → Λn inelastic scattering, 3. Σ+ p elastic scattering. According to theoretical models based on quark-gluon picture for the short range part of the baryon-baryon interactions, the Σ+ p channel is expected to have an extremely repulsive core due to the Pauli effect between quarks, which leads a Σ+ p cross section twice as large as that predicted by conventional meson exchange models with a phenomenologically treated short range repulsive core. In addition, measurement of the Σ- p channel where the quark Pauli effect is not effective is also necessary to test the present theoretical models based on meson exchange picture with the flavor SU(3) symmetry. Thus this experiment will provide essential data to test the frameworks of the theoretical models of the baryon-baryon interactions and to investigate the nature of the repulsive core which has not been understood yet. In order to overcome the experimental difficulties in measuring low-energy hyperon proton scattering, we will use a new experimental technique in which a liquid H2 target is used as hyperon production and hyperon scattering targets with a detector system surrounding the LH2 target for detection of a scattered proton and a decay product from a hyperon. The hyperon scattering event is kinematically identified. Because imaging detectors used in past experiments are not employed, high intensity π beam can be used, allowing us to take high statistics data of 100 times more than the previous experiments. We have proposed an experiment of Σp scattering at the K1.8 beam line by utilizing the K1.8 beam line spectrometer and the SKS spectrometer. A high intensity π beams of 2x107 /spill at 1.32 GeV/c and 1.42 GeV/c for the Σ- and Σ+ productions, respectively, are used to produce as many hyperon beam as possible.With 16x106 Σ- beam and 55x106 Σ+ beam around 500 MeV/c which are tagged by the spectrometers, we will detect ~10,000 Σ- p and Σ+ pscattering events and ~6,000 Σ- p → Λn inelastic reaction events in 60 days beam time in total. In this proceedings, we will present the experimental plan of the scattering experiment and results of the detailed simulation studies. [ABSTRACT FROM AUTHOR]- Published
- 2012
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21. Recovery of plasma-induced mechanical damage in resonators using Neutral Beam Etching: Wafer-scale validation by arrayed cantilevers.
- Author
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Nishimori, Y., Ueki, S., Miwa, K., Kubota, T., Samukawa, S., Hashiguchi, G., and Sugiyama, M.
- Abstract
As an effective application of Neutral Beam Etching (NBE) to MEMS, we here propose a combined approach with conventional plasma process and NBE: removal of plasma-induced damage by NBE. If it is possible, we can obtain a damage-free surface for MEMS devices without a high-temperature annealing process. In order to evaluate the effect of this combined approach quantitatively; we focused on the resonance of a micro cantilever and derived a parameter of surface damage (δEds) theoretically from Q-factor and resonance frequency. And then we examined the change in δEds of the cantilevers on an 8-inch wafer before and after NBE treatment. The initial surface of cantilevers had been damaged by plasma processes during their fabrication, and the removal of those damage by NBE was confirmed as the reduction in δEds. [ABSTRACT FROM PUBLISHER]
- Published
- 2012
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22. Extraction of Viewable Point from the Photograh Data with Location.
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Oku, K., Miwa, K., and Hattori, F.
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- 2010
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23. Optimization and analysis of staffing problems at a retail store.
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Miwa, K. and Takakuwa, S.
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- 2010
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24. EXTRACTION OF ΛΛ SCATTERING LENGTH.
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Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., and Sato, A.
- Subjects
SCATTERING length (Nuclear physics) ,MASS spectrometry ,NUCLEAR reactions ,PROTON synchrotrons ,HYPERFRAGMENTS - Published
- 2009
25. Development of semi-separated co-culture system of sympathetic neuron and cardiomyocyte.
- Author
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Takeuchi, A., Moriguchi, H., Kotani, K., Miwa, K., Jong-Kook Lee, Noshiro, M., and Jimbo, Y.
- Published
- 2009
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26. Simulation modeling and analysis for in-store merchandizing of retail stores with enhanced information technology.
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Miwa, K. and Takakuwa, S.
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- 2008
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27. Particle reduction using Y2O3 material in an etching tool.
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Miwa, K., Sawai, T., Aoyama, M., Inoue, F., Oikawa, A., and Imaoka, K.
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- 2007
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28. ν-ray spectroscopy study of Λ 11 B and Λ 12 C.
- Author
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Ma, Y., Ajimura, S., Aoki, K., Dairaku, M., Fu, Y. Y., Fujioka, H., Fukuda, T., Futatsukawa, K., Hosomi, K., Imoto, W., Kawai, M., Kakiguchi, Y., Kinoshita, S., Koike, T., Maruyama, N., Mimori, M., Minami, S., Miura, Y., Miwa, K., and Miyagi, Y.
- Abstract
In this paper, a preliminary result from the latest hypernuclear ν-ray spectroscopy experiment (KEK-E566) is presented together with a short discussion. The experiment was performed at the KEK-PS K6 beam line in 2005. In this experiment, the
12 C(Π+ ,K+ )Λ 12 C reaction was employed to populateΛ 12 C/Λ 11 B hypernuclei. A germanium detector array, Hyperball2, was constructed to detect ν-rays emitted from the hypernuclei produced. Three hypernuclear ν-ray peaks were observed and assigned. [ABSTRACT FROM AUTHOR]- Published
- 2007
- Full Text
- View/download PDF
29. Next generation hypernuclear ν-ray spectrometer: Hyperball-J.
- Author
-
Koike, T., Chiga, N., Evtoukhovitch, P., Haruyama, T., Hosomi, K., Kasami, K., Kallies, W., Ma, Y., Miwa, K., Mimori, M., Mzhavia, D., Samoilov, V., Shirotori, K., Takahashi, T., Tamura, H., Tsamalaidze, Z., Ukai, M., Yasukawa, Y., and Zhou, S. H.
- Abstract
The next generation hypernuclear ν-ray spectrometer, Hyperball-J, is described. Three of the key aspects in the array construction, namely geometrical configurations, cooling mechanism of Ge detectors, and Compton suppressors, are discussed. Results of simulation for planar and spherical arrangements are compared. Progresses in the development of pulse tube cooling system and PWO background suppression counters are reported. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
30. H-dibaryon search by KEK-E522.
- Author
-
Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., and Sato, A.
- Abstract
We searched for the H-dibaryon resonance in the ΛΛ invariant mass spectrum obtained by
12 C(K− , K+ ΛΛX) reactions using a scintillating fiber active target. We observed enhanced ΛΛ production near the threshold, as found in a previous KEK experiment, with improved statistics. Data were compared with the results of a cascade model calculation including ΛΛ final state interactions consistent with the recently measured binding energy of the double-Λ hypernucleus. No significant enhancements above the levels predicted by the model were observed. The upper limit for the production cross section of the H-dibaryon with a mass range between the ΛΛ and ΞN threshold is found to be 2.1 μb/sr at a 90% confidence level. [ABSTRACT FROM AUTHOR]- Published
- 2007
- Full Text
- View/download PDF
31. Plan for the measurement of Ξ−-atomic X rays at J-PARC.
- Author
-
Tanida, K., Chrien, R. E., Dairaku, S., Evtoukhovitch, E., Fu, Y. Y., Fujimura, H., Hashimoto, O., Hosomi, K., Imai, K., Kalinnikov, V., Kallies, W., Kamigaito, S., Karavchuk, N., Koike, T., Li, C. P., Li, X. M., Ma, Y., Mimori, M., Miwa, K., and Moissenko, A.
- Abstract
We present our plan to measure X rays from Ξ
− atoms for the first time in the world at J-PARC. The measurement of X rays from Ξ− atoms is a promising method to study the optical potential between Ξ− and a nucleus as proved in the cases of other negative hadrons (Π− , K− , ]> , and Σ− ). While we are intending to measure X rays from as many targets as possible over the periodic table, we have chosen Fe (iron) as the first target because the measurement will be the easiest and because large X-ray energy shift and width may be expected. Choice of other targets will be determined based on the result of the first experiment. We can accumulate several thousand counts of X rays and determine its energy shift down to ∼0.05 keV. This is sensitive enough to observe expected energy shift (∼1 keV) with reasonable accuracy, while sensitivities for X-ray width is somewhat weaker (measurable down to ∼1 keV). [ABSTRACT FROM AUTHOR]- Published
- 2007
- Full Text
- View/download PDF
32. Search for Θ+ via K+p → Π +X reaction with high-resolution spectrometer system.
- Author
-
Dairaku, S., Ajimura, S., Arvieux, J., Fujioka, H., Fukuda, T., Funahashi, H., Hayata, M., Hicks, K., Imai, K., Ishimoto, S., Kameyama, T., Kinoshita, S., Koike, T., Ma, Y., Maruta, T., Miura, Y., Miwa, K., Miyabe, M., Nagae, T., and Nakajima, D.
- Abstract
A search for the Θ
+ pentaquark in the K+ p → Π+ X reaction was performed utilizing a high-resolution spectrometer at the K6 beam line of the KEK 12GeV Proton Synchrotron. Incident K+ beams of 1.2 GeV/c were irradiated to a liquid hydrogen target. No significant evidence of the Θ+ was found. The upper limit of the differential cross section averaged over 2° to 20° in the laboratory frame for the K+ p → Π+ Θ+ reaction was obtained to be 1.9 μb/sr at 90 % confidence level. From the present result, the t-channel process is excluded or the coupling constantgK*NΘ is quite small. [ABSTRACT FROM AUTHOR]- Published
- 2007
- Full Text
- View/download PDF
33. Implementation and Evaluation of 4??4 MIMO Fading Simulator Considering Antenna Characteristics.
- Author
-
Dao Nguyen Dung, Sakaguchi, K., Suyama, S., Nagareda, R., Takada, J., Suzuki, H., Araki, K., Arata, S., Kaiga, K., Manabe, S., Yamaguchi, T., and Miwa, K.
- Published
- 2006
- Full Text
- View/download PDF
34. TIME PROJECTION CHAMBER FOR PHOTOPRODUCTION OF HYPERON RESONANCES AT SPRING-8/LEPS.
- Author
-
FUJIMURA, H., IMAI, K., NIIYAMA, M., FUNAHASHI, H., MIYABE, M., MIWA, K., NAKATSUGAWA, Y., YOSOI, M., AHN, J. K., AHN, D. S., HOTTA, T., KINO, K., KOHRI, H., MIBE, T., MURAMATSU, N., NAKANO, T., SAWADA, T., AJIMURA, S., SUGAYA, Y., and CHANG, W. C.
- Subjects
HYPERONS ,TIME projection chambers (Nuclear physics) ,ANGULAR acceleration ,QUARKS ,GROUND state (Quantum mechanics) - Published
- 2005
35. PENTAQUARK SEARCH VIA (π-, K-) REACTION.
- Author
-
MIWA, K.
- Subjects
PENTAQUARK ,GROUND state (Quantum mechanics) ,NUCLEAR counters ,NUCLEAR physics experiments ,NUCLEAR reactions - Published
- 2005
36. A multivariate statistical analysis of tool parameters to improve an erase failure of a flash memory device.
- Author
-
Miwa, K., Watanabe, K., Takeishi, K., Kobayashi, T., and Imaoka, K.
- Published
- 2005
- Full Text
- View/download PDF
37. Measurement of Invariant Mass Spectra of Vector Meson Decaying in Nuclear Matter at KEK-PS.
- Author
-
Muto, R., Chiba, J., En'yo, H., Fukao, Y., Funahashi, H., Hamagaki, H., Ieiri, M., Ishino, M., Kanda, H., Kitaguchi, M., Mihara, M., Miwa, K., Miyashita, T., Murakami, T., Nakura, T., Naruki, M., Nomachi, M., Ozawa, K., and Sakuma, F.
- Subjects
ELECTRON-electron interactions ,MESONS ,MASS spectrometry ,NUCLEAR matter ,NUCLEAR physics ,PHYSICS - Abstract
We measured invariant mass spectra of e+e- pairs produced in 12-GeV p + A interaction to investigate in-medium mass modification of vector mesons. We observed the excess over the known hadronic sources below the ω meson mass peak. The obtained ρ/ω ratio and velocity dependence of excess/ω ratio imply that this excess mainly results from ρ meson whose mass was modified in nuclear matter. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
- View/download PDF
38. HIGH-RESOLUTION γ-RAY SPECTROSCOPY OF HYPERFRAGMENTS PRODUCED BY STOPPED K- REACTIONS.
- Author
-
MIWA, K., TANIDA, K., AKIKAWA, H., FUKAO, Y., HIYAMA, E., HOTCHI, H., IMAI, K., MIURA, Y., MIZUNUMA, K., NAKAMURA, S. N., NIIYAMA, M., OTA, S., SAHA, P. K., TAKAHASHI, H., TAKAHASHI, T., TAMURA, H., TERASHIMA, S., TOGAWA, M., and UKAI, M.
- Subjects
HYPERONS ,HYPERFRAGMENTS ,NUCLEAR structure ,GERMANIUM detectors ,NUCLEAR physics - Published
- 2004
39. In-situ quantification of deposition amount in a poly-Si etch chamber using optical emission spectroscopy of etching plasmas.
- Author
-
Miwa, K. and Kawabata, Y.
- Published
- 2003
- Full Text
- View/download PDF
40. Obstacle Detection Method Using Array Antenna for Coupled-resonant Wireless Power Transfer.
- Author
-
Yamada, H., Miwa, K., Hirayama, H., Kikuma, N., and Sakakibara, K.
- Subjects
WIRELESS power transmission ,ELECTRIC power transmission ,ANTENNA arrays ,COMPUTER simulation ,POWER transmission - Abstract
This paper proposes a method of obstacle detection for coupled-resonant wireless power transfer. 2 x 2 array antenna is used for power transmission and obstacle detection. Standard deviation of transmission coefficient and reflection coefficient is used as an index of detection. Feasibility of the proposed method is verified through numerical simulations. [ABSTRACT FROM AUTHOR]
- Published
- 2013
41. J-PARC E27 Experiment to Search for a Nuclear Kaon Bound State K pp.
- Author
-
Ichikawa, Y., Bhang, H., Bufalino, S., Ekawa, H., Evtoukhovitch, P., Feliciello, A., Fujioka, H., Hasegawa, S., Hayakawa, S., Honda, R., Hosomi, K., Imai, K., Ishimoto, S., Joo, C., Kanatsuki, S., Kiuchi, R., Koike, T., Kumawat, H., Matsumoto, Y., and Miwa, K.
- Subjects
KAONS ,PROTON-proton interactions ,BOUND states ,PHYSICS experiments ,NUCLEAR reactions ,BINDING energy ,RADIOACTIVE decay ,MASS measurement - Abstract
In the J-PARC E27 experiment, we search for a K pp bound state via the d( π, K) reaction at 1.7 GeV/ c at the K1.8 beam line. The binding energy and decay width of the K pp bound state can be obtained in the missing mass measurement with a good energy resolution of 2 MeV/ c. A range counter array (RCA) was constructed to detect the two high-momentum protons from the K pp decay and to reduce the background such as quasi-free hyperon production. Recently, we have carried out a pilot run in June, 2012. The d( π, K) missing-mass spectrum has been obtained for the first time. In this report, an overview of the E27 experiment and a preliminary result on this pilot run are presented. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
42. Study of Neutron-Rich Hypernuclei by the ( π, K) Reaction at J-PARC.
- Author
-
Sugimura, H., Ajimura, S., Bhang, H., Busso, L., Endo, M., Faso, D., Fukuda, T., Hasegawa, S., Hayakawa, S., Honda, R., Ichikawa, Y., Imai, K., Ishibashi, N., Kishimoto, T., Kiuchi, R., Matsuda, K., Matsuoka, K., Miwa, K., Mizoi, Y., and Morra, O.
- Subjects
NEUTRONS ,HYPERFRAGMENTS ,NUCLEAR reactions ,PHYSICS experiments ,LITHIUM isotopes ,SILICON detectors ,PERFORMANCE evaluation - Abstract
We are planning to perform an experiment at J-PARC and produce new neutron-rich Λ hypernuclei by using the ( π, K) reaction (J-PARC E10). As the first step, we are planning to produce $${^6_{\Lambda}{\rm H}}$$ hypernuclei with a Li target. To conduct this experiment, we are developing new detectors, those are scintillating fiber tracker, and silicon strip detector, for high rate operation to aim at increasing beam intensity up to 10/spill. As a result of beam test in Jun 2012, we are going to use high-rate beam at least 10/spill. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
43. Gastric cancer - State of the Art in Japan.
- Author
-
Fujimura, T., Kinoshita, J., Makino, I., Nakamura, K., Oyama, K., Fujita, H., Tajima, H., Takamura, H., Ninomiya, I., Kitagawa, H., Fushida, S., Ohta, T., and Miwa, K.
- Published
- 2012
44. Multi-platform experiment to cross a boundary between laboratory and real situational studies: experimental discussion of cross-situational consistency of driving behaviors.
- Author
-
Terai, H., Miwa, K., Okuda, H., Tazaki, Y., Suzuki, T., Kojima, K., Morita, J., Maehigashi, A., and Takeda, K.
- Subjects
AUTOMOBILE driving ,BEHAVIOR ,COMPUTER simulation ,MULTIVARIATE analysis ,PROBABILITY theory ,VIDEO recording ,VIRTUAL reality ,BEHAVIORAL research - Abstract
We constructed an innovative experimental platform to study cross-situational consistency in driving behavior, conducted behavioral experiments, and reported the data obtained in the experiment. To discuss cross-situational consistency, we separated situations in which people use some systems to conduct tasks into three independent conceptual factors: environment, context, and system. We report the experimental results with the following systems: a laboratory system with a gaming controller and steering/pedal controllers and a real system, COMS an instrumented vehicle. The results are summarized as follows. 1) The individual behaviors in each system were stable, and consistency was retained. 2) The consistency of the behaviors was also confirmed when the participants drove using different interfaces in identical systems. 3) However, only slight correlation was observed across different systems in a specific situation where a strong high-order cognitive constraint (i.e., rapid driving) and a weak low-order cognitive constraint (driving with easy handling toward a straight-line course) were given. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
45. Quantitative evaluation of vascularity within cervical lymph nodes using Doppler ultrasound in patients with oral cancer: relation to lymph node size.
- Author
-
Kagawa, T., Yuasa, K., Fukunari, F., Shiraishi, T., and Miwa, K.
- Subjects
QUANTITATIVE research ,LYMPH nodes ,DOPPLER ultrasonography ,ORAL cancer ,MEDICAL imaging systems ,METASTASIS - Abstract
Objectives: The aim of this study was to quantitatively evaluate the relationship between vascularity within lymph nodes and lymph node size on Doppler ultrasound images of patients with oral cancer. Methods: A total of 310 lymph nodes (86 metastatic, 224 benign) from 63 patients with oral cancer were classified into 4 groups according to their short axis diameters: Group 1, short axis diameters of 4-5 mm; Group 2, 6-7 mm; Group 3, 8 9 mm, and Group 4, ≥ 10 mm. Vascular and scattering indices of lymph nodes on Doppler ultrasound images were analysed quantitatively. The vascular index was defined as the ratio of blood flow area to the whole lymph node area and the scattering index was defined as the number of isolated blood flow signal units. Results: For metastatic lymph nodes, the vascular index was highest in Group 1 and decreased as lymph node size increased. The vascular index of benign lymph nodes did not differ significantly among the four groups. The vascular index of metastatic lymph nodes was significantly higher than that of benign lymph nodes in Group 1. For metastatic lymph nodes, the scattering index increased as lymph node size increased and was significantly higher than that of benign lymph nodes in Groups 2 4. Conclusions: An increase in vascularity is a characteristic of Doppler ultrasound findings in small metastatic lymph nodes. As the metastatic lymph node size increases, blood flow signals become scattered, and the scattering index increases. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
46. UGT1A1*1/*28 and *1/*6 genotypes have no effects on the efficacy and toxicity of FOLFIRI in Japanese patients with advanced colorectal cancer.
- Author
-
Sunakawa Y, Ichikawa W, Fujita K, Nagashima F, Ishida H, Yamashita K, Mizuno K, Miwa K, Kawara K, Akiyama Y, Araki K, Yamamoto W, Miya T, Narabayashi M, Ando Y, Hirose T, Saji S, Sasaki Y, Sunakawa, Yu, and Ichikawa, Wataru
- Abstract
Purpose: Differences in efficacy and toxicity between UDP-glucuronosyltransferase (UGT) 1A1*1/*1 and *1/*6 or *1/*28 genotypes remain unclear in Japanese patients.Methods: Patients with advanced colorectal cancer who received irinotecan combined with 5-fluorouracil plus l-leucovorin (FOLFIRI) as first-line therapy were divided into two groups: those with UGT1A1*1/*1 genotype and those with UGT1A1*1/*6 or *1/*28 genotype. Efficacy and toxicity were compared between these groups retrospectively.Results: Forty-two patients (24 *1/*1 and 18 *1/*6 or *1/*28) were evaluated. The response rate was 48% in *1/*1 group and 56% in *1/*6 or *1/*28 group (P = 0.847). Median progression-free survival was 8.6 months in *1/*1 group and 8.5 months in *1/*6 or *1/*28 group (P = 0.888). No hematologic or non-hematologic toxic effects were clearly related to UGT1A1*1/*6 or *1/*28 during the first cycle or throughout the entire course of chemotherapy.Conclusions: There were no significant differences in the efficacy or toxicity of FOLFIRI between patients with UGT1A1*1/*1 genotype and those with UGT1A1*1/*6 or *1/*28 genotype. Our results suggest that patients with the latter genotypes can receive FOLFIRI at the same dose of irinotecan as those with the UGT1A1*1/*1 genotype receive. [ABSTRACT FROM AUTHOR]- Published
- 2011
- Full Text
- View/download PDF
47. Renal cell carcinoma associated with Xp11.2 translocation/TFE3 gene fusion: Radiological findings mimicking papillary subtype.
- Author
-
Kato H, Kanematsu M, Yokoi S, Miwa K, Horie K, Deguchi T, and Hirose Y
- Published
- 2011
- Full Text
- View/download PDF
48. Lithium Tetraborate (Li2B4O7) SAW Resonators.
- Author
-
Abe, H., Saitou, H., Ohmura, M., Yamada, T., and Miwa, K.
- Published
- 1986
- Full Text
- View/download PDF
49. EXTRACTION OF ΛΛ SCATTERING LENGTH.
- Author
-
Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., and Sato, A.
- Subjects
SCATTERING amplitude (Physics) ,MASS spectrometry ,PROTON synchrotrons ,MATRICES (Mathematics) ,MATHEMATICAL models ,STANDARD deviations - Abstract
We determine ΛΛ scattering parameters from a ΛΛ invariant mass spectrum that was obtained by
12 C(K- , K+ ΛΛ) reaction at the KEK Proton Synchrotron. In the framework of Watson's procedure, the obtained scattering length $a_{\Lambda \Lambda} = - 0.10\,_{- 2.37}^{+ 0.45}\, \pm \,0.04$ and effective range $r_{\Lambda \Lambda}\, = 13.90\,_{< - 13.90}^{> + 16.10}\, \pm \,9.48\,{\rm{fm}}$ are most consistent with the values predicted by using the Nijmegen soft core models (NSC97's). However, the predicted values by using the Nijmegen hard-core ND (G-matrix) and the extended soft-core (ESC00) models are out of two standard deviations from the determined scattering parameters. [ABSTRACT FROM AUTHOR]- Published
- 2010
50. Serum inflammatory proteins and frontal lobe dysfunction in patients with cardiovascular risk factors.
- Author
-
Hoshi, T., Yamagami, H., Furukado, S., Miwa, K., Tanaka, M., Sakaguchi, M., Sakoda, S., and Kitagawa, Kazuo
- Subjects
FRONTAL lobe diseases ,MINI-Mental State Examination ,STROOP effect ,BRAIN imaging ,NEUROPSYCHOLOGICAL tests - Abstract
Background: Recent studies have shown that the levels of circulating inflammatory markers are associated with cognitive decline and cerebral small-vessel disease. Frontal lobe dysfunction is believed to be a relatively characteristic neuropsychological symptom in vascular cognitive impairment caused by cerebral small-vessel disease. The purpose of this study was to investigate whether the levels of serum inflammatory markers are associated with frontal lobe dysfunction, particularly executive dysfunction. Methods: Between January 2003 and September 2007, 388 patients who had one or more atherosclerotic risk factors and subsequently underwent brain MRI and neuropsychological testing including mini-mental state examination (MMSE), frontal assessment battery (FAB), and modified Stroop test were enrolled in this study. We evaluated the effect of serum levels of inflammatory markers and white matter lesions on frontal lobe function. Results: The FAB score was negatively correlated with serum inflammatory marker levels (hsCRP; r = −0.170, IL-6; r = −0.143, IL-18; r = −0.175) and white matter lesions. In the modified Stroop test, interference measure was positively correlated with the levels of hsCRP ( r = −0.198), and IL-18 ( r = −0.152), and white matter lesions. However, the MMSE score was not correlated with either inflammatory marker levels. The association between hsCRP and FAB score or interference measure remained significant when controlling for other confounding factors and MRI findings. Conclusions: The circulating level of hsCRP is associated with frontal lobe dysfunction in patients with cardiovascular risk factors independent of white matter lesions in brain MRI. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
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