Search results for: T. Iwasaki

Items from 1 to 20 out of 239 results

article

Image Gallery: Cutaneous hydrophilic polymer emboli following thoracic endovascular aortic repair

M. Kinouchi, T. Iwasaki, M. Koyama, M. Obata, more

British Journal of Dermatology > 180 > 6 > e182 - e182

article

Fine‐scale spatial genetic structure in the Minami‐daito Island population of the Ryukyu scops owl Otus elegans

A. Sawada, T. Iwasaki, M. Takagi

Journal of Zoology > 307 > 3 > 159 - 166

Multiple factors can give rise to population genetic structure. Therefore, the generating process of genetic structure should be examined from multiple aspects simultaneously. We describe the fine‐scale genetic structure of the Ryukyu scops owl Otus elegans interpositus population on Minami‐daito Island and test isolation‐by‐distance, isolation‐by‐adaptation and assortative mating as candidates for...

article

A higher incidence of cleavage failure in oocytes containing smooth endoplasmic reticulum clusters

Junko Otsuki, T. Iwasaki, Y. Katada, Y. Tsutsumi, more

Journal of Assisted Reproduction and Genetics > 2018 > 35 > 5 > 899-905

Purpose In human oocytes, sERCs are one of the dysmorphic phenotypes that have been reported. Significantly reduced pregnancy rates and a comparatively higher number of abnormities in live births appear to be associated with the presence of sERCs in oocytes. However, some reports have shown that healthy babies can be born, without any reduced pregnancy rates, from oocytes observed to contain sERCs...

article

Receiver function images of the distorted Philippine Sea slab contact with the continental crust: Implications for generation of the 1891 Nobi earthquake (Mj 8.0)

T. Iidaka, T. Igarashi, A. Hashima, A. Kato, more

Tectonophysics > 2017 > 717 > C > 41-50

The 28 October 1891 Nobi earthquake was one of the largest intraplate earthquakes in Japan, with an estimated magnitude of 8.0 determined by the Japan Meteorological Agency. It occurred in central Japan on the Eurasian Plate, beneath which the young Philippine Sea Plate is subducting. The geometry of this plate is not smooth; rather, beneath western Japan it appears distorted over a relatively short...

article

The poor quality of women’s sleep negatively influences fertilization rates in assisted reproductive technology

S. Akamatsu, J. Otsuki, M. Fujii, N. Enatsu, more

Fertility and Sterility > 2017 > 108 > 3(S) > e120

chapter

Study on measurement performance of future space-based Doppler wind lidar in Japan

S. Ishii, K. Okamoto, P. Baron, T. Ishibashi, more

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 4238 - 4245

IGARSS 2017 - 2017 IEEE International Geoscience and Remote Sensing Symposium

Wind is fundamental in many atmospheric phenomena. Global wind profile observation is important to improve numerical weather prediction (NWP) and various meteorological studies. Wind profile observations are measured mainly by radiosonde networks. Most of the weather stations are on land, while weather stations on oceans and remote land areas are sparsely distributed. The current global wind observing...

article

Influence of pharyngeal airway respiration pressure on Class II mandibular retrusion in children: A computational fluid dynamics study of inspiration and expiration

T. Iwasaki, H. Sato, H. Suga, Y. Takemoto, more

Orthodontics & Craniofacial Research > 20 > 2 > 95 - 101

Objectives To examine the influence of negative pressure of the pharyngeal airway on mandibular retraction during inspiration in children with nasal obstruction using the computational fluid dynamics (CFD) method. Setting and Sample Population Sixty‐two children were divided into Classes I, II (mandibular retrusion) and III (mandibular protrusion) malocclusion groups. Material and Methods Cone‐beam...

article

40^th EASD Annual Meeting of the European Association for the Study of Diabetes

M. Veitenhansl, K. Stegner, F.-X. Hierl, C. Dieterle, more

Diabetologia > 2004 > 47 > 1 > A1-A464

article

Silica-coating of nitrogen-doped titanium oxide particles and their electrical conductivity

Y. Kobayashi, T. Iwasaki

Advanced Powder Technology > 2016 > 27 > 3 > 819-824

The present work investigates effects of concentrations of raw chemicals in a sol–gel process on morphology of partially nitrided titanium oxide (TiON) particles coated with silica shells (TiON/SiO₂) and describes their electronic insulation properties. Commercially available TiON particles with an average size of 90.3±29.9nm, of which the volume resistivity was 6.27×10⁻²Ωm under pressure applied...

chapter

The Relationship Between the Changes in Local Stiffness of Chicken Myofibril and the Tenderness of Muscle During Postmortem Aging

T. Iwasaki, Y. Hasegawa, K. Yamamoto, K. Nakamura

Progress in Colloid and Polymer Science > Gels: Structures, Properties, and Functions > 205-210

We have investigated that the relationship between the stiffness of myofibrils and the tenderness of muscle during postmortem aging. The stiffness (elasticity) of A and I bands as well as Z-line of chicken myofibrils during postmortem aging were measured by atomic force microscope. The stiffness of all regions increased till 12 hr of postmortem, then it decreased to 96 hr. This tendency was the same...

article

Charge state modulation of nitrogen vacancy centers in diamond by applying a forward voltage across a p–i–n junction

M. Shimizu, T. Makino, T. Iwasaki, J. Hasegawa, more

Diamond and Related Materials > 2016 > 63 > C > 192-196

Charge state control of the nitrogen vacancy center (NV center) in diamond is important to the realization of applications such as magnetometers or quantum information processing, because only negatively charged NV centers have attractive spin properties. We fabricated p–i–n (p-type–intrinsic–n-type) junctions to investigate the charge state properties of the NV centers in an ultrapure i-layer with...

article

Dynamic meandering in response to upstream perturbations and floodplain formation

F. Schuurman, Y. Shimizu, T. Iwasaki, M.G. Kleinhans

Geomorphology > 2016 > 253 > C > 94-109

River meandering results from spatially alternating bank erosion and bar growth. Recent flume experiments and theory suggest that a continuous inflow perturbation is a requirement for sustained meandering. Furthermore, flume experiments suggest that bar–floodplain conversion is an additional requirement. Here, we tested the effects of continuous inflow perturbation and bar–floodplain conversion on...

article

BiI3 single crystal for room-temperature gamma ray detectors

T. Saito, T. Iwasaki, S. Kurosawa, A. Yoshikawa, more

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,... > 2016 > 806 > C > 395-400

BiI₃ single crystals were grown by the physical vapor transport method. The repeated sublimation of the starting material reduced impurities in the BiI₃ single crystal to sub-ppm levels. The detector was fabricated by depositing Au electrodes on both surfaces of the 100-μm-thick BiI₃ single crystal platelet. The resistivity of the BiI₃ single crystal was increased by post-annealing in an iodine atmosphere...

chapter

Current enhancement by conductivity modulation in diamond JFETs for next generation low-loss power devices

T. Iwasaki, H. Kato, J. Yaita, T. Makino, more

2015 IEEE 27th International Symposium on Power Semiconductor Devices & IC's (ISPSD) > 77 - 80

2015 IEEE 27th International Symposium on Power Semiconductor Devices & IC's (ISPSD)

Diamond junction field-effect transistors (JFETs) were operated in bipolar-mode to enhance the drain current. In unipolar-mode, the drain current in diamond JFET is limited by low activation of boron acceptors in the p-type channel. To increase the drain current, minority carriers were injected from the n⁺-diamond gates to p-channel, resulting in conductivity modulation. The drain current increased...

article

Hypocenter migration and crustal seismic velocity distribution observed for the inland earthquake swarms induced by the 2011 Tohoku‐Oki earthquake in NE Japan: implications for crustal fluid distribution and crustal permeability

T. Okada, T. Matsuzawa, N. Umino, K. Yoshida, more

Geofluids > 15 > 1-2 > 293 - 309

After the occurrence of the 2011 magnitude 9 Tohoku earthquake, the seismicity in the overriding plate changed. The seismicity appears to form distinct belts. From the spatiotemporal distribution of hypocenters, we can quantify the evolution of seismicity after the 2011 Tohoku earthquake. In some earthquake swarms near Sendai (Nagamachi‐Rifu fault), Moriyoshi‐zan volcano, Senya fault, and the Yamagata–Fukushima...

article

Kraniale Technik der radikalen Lymphknotendissektion im Bereich der mittleren Kolongefäße bei laparoskopischer Operation des Kolonkarzinoms

T. Matsuda, T. Iwasaki, M. Mitsutsuji, K. Hirata, more

coloproctology > 2015 > 37 > 3 > 165-169

Ziel Da die laparoskopische Dissektion der Lymphknoten (LK) im Bereich der A. und V. colica media technisch anspruchsvoll ist, wird die Laparoskopie bei Karzinomen des Colon transversum kontrovers diskutiert. Im vorliegenden Beitrag beschreiben wir eine kraniale Technik zur Durchführung einer LK-Dissektion im Bereich der A. und V. colica media. Hauptmerkmal dieses Ansatzes ist die frühzeitige Teilung...

article

Computational modeling of 137Cs contaminant transfer associated with sediment transport in Abukuma River

T. Iwasaki, M. Nabi, Y. Shimizu, I. Kimura

Journal of Environmental Radioactivity > 2015 > 139 > C > 416-426

A numerical model capable of simulating the transfer of ¹³⁷Cs in rivers associated with transport of fine sediment is presented. The accident at Fukushima Dai-ichi Nuclear Power Plant (FDNPP) released radionuclides into the atmosphere, and after fallout several radionuclides in them, such as radiocesium (¹³⁴Cs, ¹³⁷Cs) and radioiodine (¹³¹I) were adsorbed on surface soil particles around FDNPP and...

article

The clinical significance of blastocyst grade at post-thawing: from an analysis of 2,425 single frozen-thawed blastocyst transfer cycles

H. Ogata, S. Ogata, T. Iwasaki, Y. Matsumoto, more

Fertility and Sterility > 2014 > 102 > 3 Supplement > e227

article

Metabolomic investigation of pathogenesis of myxosporean emaciation disease of tiger puffer fish Takifugu rubripes

H Kodama, K Otani, T Iwasaki, S Takenaka, more

Journal of Fish Diseases > 37 > 7 > 619 - 627

Serum biochemical analysis was undertaken to study the pathophysiological details of emaciation disease of the tiger puffer fish Takifugu rubripes (Temminck and Schlegel). Serum parameters were measured by biochemical analysis using automated dry chemistry and gas chromatography/mass spectrometry (GC/MS). Serum concentrations of albumin, amylase, calcium, creatinine, glucose and total protein were...

chapter

Enhancement of smith-purcell radiations by selfbunched electron beams in oversized backward wave oscillators

K. Ogura, K. Yambe, T. Iwasaki, S. Magori, more

2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS) > 1 - 6

2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS)

Smith-Purcell (SP) radiations of weakly relativistic oversized backward wave oscillator (BWO) are examined experimentally. Our oversized BWOs are driven by weakly relativistic electron beams less than 100 keV. New element of this work is an enhancement of SP radiation in the oversized BWO using the bunching section. An annular beam is self-bunched in the K-band bunching section and then is injected...

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INFONA - science communication portal

Search results for: T. Iwasaki

Image Gallery: Cutaneous hydrophilic polymer emboli following thoracic endovascular aortic repair

Fine‐scale spatial genetic structure in the Minami‐daito Island population of the Ryukyu scops owl Otus elegans

A higher incidence of cleavage failure in oocytes containing smooth endoplasmic reticulum clusters

Receiver function images of the distorted Philippine Sea slab contact with the continental crust: Implications for generation of the 1891 Nobi earthquake (Mj 8.0)

The poor quality of women’s sleep negatively influences fertilization rates in assisted reproductive technology

Study on measurement performance of future space-based Doppler wind lidar in Japan

Influence of pharyngeal airway respiration pressure on Class II mandibular retrusion in children: A computational fluid dynamics study of inspiration and expiration

40^th EASD Annual Meeting of the European Association for the Study of Diabetes

Silica-coating of nitrogen-doped titanium oxide particles and their electrical conductivity

The Relationship Between the Changes in Local Stiffness of Chicken Myofibril and the Tenderness of Muscle During Postmortem Aging

Charge state modulation of nitrogen vacancy centers in diamond by applying a forward voltage across a p–i–n junction

Dynamic meandering in response to upstream perturbations and floodplain formation

BiI3 single crystal for room-temperature gamma ray detectors

Current enhancement by conductivity modulation in diamond JFETs for next generation low-loss power devices

Hypocenter migration and crustal seismic velocity distribution observed for the inland earthquake swarms induced by the 2011 Tohoku‐Oki earthquake in NE Japan: implications for crustal fluid distribution and crustal permeability

Kraniale Technik der radikalen Lymphknotendissektion im Bereich der mittleren Kolongefäße bei laparoskopischer Operation des Kolonkarzinoms

Computational modeling of 137Cs contaminant transfer associated with sediment transport in Abukuma River

The clinical significance of blastocyst grade at post-thawing: from an analysis of 2,425 single frozen-thawed blastocyst transfer cycles

Metabolomic investigation of pathogenesis of myxosporean emaciation disease of tiger puffer fish Takifugu rubripes

Enhancement of smith-purcell radiations by selfbunched electron beams in oversized backward wave oscillators

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