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Search Results: 1 - 10 of 19 matches for " Kiyama "
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To What Extent Does Accent Sensitivity Provide the Foundation for Lexical Knowledge and Listening Comprehension?  [PDF]
Arthur D. Meerman, Sachiko Kiyama, Katsuo Tamaoka
Open Journal of Modern Linguistics (OJML) , 2014, DOI: 10.4236/ojml.2014.43037
Abstract:

The present study investigated the extent to which accent sensitivity provides the foundation for lexical knowledge and listening comprehension for Japanese university students learning English as a foreign language (EFL). On an English accent correctness (i.e., YES/NO response) decision task, 63 participants showed considerably high accuracy and speed in identifying correctly-accented nouns (82.14% and 1091 ms) and adverbs (86.67% and 959 ms). However, students were much less accurate in rejecting incorrectly-accented nouns (72.33% and 910 ms) and adverbs (67.67% and 933 ms). The results of a structural equation modeling (SEM) analysis showed that accent sensitivity makes no contribution to either participants’ lexical knowledge or listening comprehension skills. In contrast, a strong direct effect was found from lexical knowledge to listening comprehension. As such, accent knowledge by Japanese EFL students is isolated from their lexical knowledge, with no contribution to their ability for listening comprehension.

Presence of 3d Quadrupole Moment in LaTiO3 Studied by 47,49Ti NMR
Takashi Kiyama,Masayuki Itoh
Physics , 2003, DOI: 10.1103/PhysRevLett.91.167202
Abstract: Ti NMR spectra of LaTiO3 are reexamined and the orbital state of this compound is discussed. The NMR spectra of LaTiO3 taken at 1.5 K under zero external field indicate a large nuclear quadrupole splitting. This splitting is ascribed to the presence of the rather large quadrupole moment of 3d electrons at Ti sites, suggesting that the orbital liquid model proposed for LaTiO3 is inappropriate. The NMR spectra are well explained by the orbital ordering model expressed approximately as $1/\sqrt{3}(d_{xy}+d_{yz}+d_{zx})$ originating from a crystal field effect. It is also shown that most of the orbital moment is quenched.
Effect of Animacy on Word Order Processing in Kaqchikel Maya  [PDF]
Sachiko Kiyama, Katsuo Tamaoka, Jungho Kim, Masatoshi Koizumi
Open Journal of Modern Linguistics (OJML) , 2013, DOI: 10.4236/ojml.2013.33027
Abstract:

This study investigated the processing load of transitive sentences in two different basic word orders (i.e., VOS and SVO) in Kaqchikel Maya, with a particular focus on the animacy of the object. The results of a sentence plausibility judgment task showed that VOS sentences were processed faster than SVO sentences regardless of the animacy of the object. This supports the traditional analysis in Mayan linguistics that, although SVO is the most frequently used word order, the syntactically determined basic word order is VOS in Kaqchikel, as in many other Mayan languages. More importantly, the results suggest that the processing load in Kaqchikel sentence comprehension is more strongly affected by syntactic canonicity than production frequency or object animacy.

Modelo Termo-Mecánico para un Manipulador Tipo Dieléctrico
Kiyama,F.F.; Vargas,E.;
Información tecnológica , 2004, DOI: 10.4067/S0718-07642004000500004
Abstract: a mathematical model is proposed for the estimation of the position of one of the degrees of freedom of a manipulator which is operated by a cushion-type pneumatic cylinder. pneumatic modeling is based on the thermodynamic principle of conservation of mass and energy . mechanical modeling is constructed based on the newton-euler formulation, and a variant of the estimated friction curve of van der vrande is proposed for the system. integral forms of the models are analyzed using simulation, and the results are compared with results obtained on a prototype manipulator which was built and instrumented for this purpose. it is concluded that the thermo-mechanical model obtained satisfactorily describes the position and the force exerted by the manipulator
Modelo Termo-Mecánico para un Manipulador Tipo Dieléctrico Thermo-Mechanical Model for a Dielectric Manipulator
F.F. Kiyama,E. Vargas
Información Tecnológica , 2004,
Abstract: Se propone un modelo matemático para aproximar la posición de uno de los grados de libertad de un manipulador, el cual es accionado mediante un cilindro neumático equipado con almohadillas de frenado. El modelado neumático se basa en los principios termodinámicos de la conservación de la energía y la materia. El modelado mecánico es construido mediante la formulación de Newton-Euler, y se propone una variante de la aproximación de la curva de fricción de Van der Vrande para aproximar el efecto de la fuerza de fricción en el sistema. Se analizan los modelos de forma integral mediante simulación, y se comparan los resultados de la simulación con los resultados obtenidos en un prototipo del manipulador, construido e instrumentado para este propósito. Se concluye que el modelo termo-mecánico obtenido describe satisfactoriamente la posición y la fuerza ejercida por el manipulador A mathematical model is proposed for the estimation of the position of one of the degrees of freedom of a manipulator which is operated by a cushion-type pneumatic cylinder. Pneumatic modeling is based on the thermodynamic principle of conservation of mass and energy . Mechanical modeling is constructed based on the Newton-Euler formulation, and a variant of the estimated friction curve of Van der Vrande is proposed for the system. Integral forms of the models are analyzed using simulation, and the results are compared with results obtained on a prototype manipulator which was built and instrumented for this purpose. It is concluded that the thermo-mechanical model obtained satisfactorily describes the position and the force exerted by the manipulator
The nuclear events guiding successful nerve regeneration
Sumiko Kiryu-Seo,Hiroshi Kiyama
Frontiers in Molecular Neuroscience , 2011, DOI: 10.3389/fnmol.2011.00053
Abstract: Peripheral nervous system (PNS) neurons survive and regenerate after nerve injury, whereas central nervous system (CNS) neurons lack the capacity to do so. The inability of the CNS to regenerate presumably results from a lack of intrinsic growth activity and a permissive environment. To achieve CNS regeneration, we can learn from successful nerve regeneration in the PNS. Neurons in the PNS elicit dynamic changes in gene expression in response to permissive environmental cues following nerve injury. To switch gene expression on and off in injured neurons, transcription factors and their networks should be carefully orchestrated according to the regeneration program. This is the so-called “intrinsic power of axonal growth.” There is an increasing repertoire of candidate transcription factors induced by nerve injury. Some of them potentiate the survival and axonal regeneration of damaged neurons in vivo; however, our knowledge of transcriptional events in injured neurons is still limited. How do these transcription factors communicate with each other? How does the transcriptional machinery regulate the wide variety of regeneration-associated genes (RAGs) in the properly coordinated manner? In this review, we describe our current understanding of the injury-inducible transcriptional factors that enhance the intrinsic growth capacity, and propose a potential role for specificity protein 1 (Sp1), which provides a platform to recruit injury-inducible transcription factors, in simultaneous gene regulation. Finally, we discuss an additional mechanism that is involved in epigenetic modifications in damaged neurons. A comprehensive understanding of the nuclear events in injured neurons will provide clues to clinical interventions for successful nerve regeneration.
Ischemia of the lateral femoral cutaneous nerve during periacetabular osteotomy using Smith-Petersen approach
Takahiko Kiyama,Masatoshi Naito,Kei Shiramizu,Tuyoshi Shinoda,Akira Maeyama
Journal of Orthopaedics and Traumatology , 2009, DOI: 10.1007/s10195-009-0055-5
Abstract: Decrease of blood flow of LFCN by more than 50% seems to cause persistent symptoms after surgery through the Smith-Petersen approach even if direct trauma to the nerve is avoided. Excessive traction by retractors is thought to be the main cause of blood flow reduction.
Successful voriconazole treatment of invasive pulmonary aspergillosis in a patient with acute biphenotypic leukemia
Kobayashi,Koichiro,Ogasawara,Masahiro,Kiyama,Yoshio,Miyazono,Takayoshi
Acta Medica Okayama , 2009,
Abstract: A 23-year old woman with acute biphenotypic leukemia (ABL) complained of chest pain with cough, high fever and hemoptysis during induction chemotherapy, although she had been treated with anti-biotics and micafungin. We made a clinical diagnosis of invasive pulmonary aspergillosis (IPA) based on a consolidation in the right upper lung field on a chest radiograph as well as a high level of serum beta-D-glucan (with no evidence of tuberculosis and candidiasis). We changed her treatment from micafungin to voriconazole. Later, we discovered an air-crescent sign by CT scan that supported the diagnosis of IPA. Following voriconazole treatment, clinical symptoms ceased and abnormal chest shadows improved gradually and concurrently with a recovery of neutrophils. IPA must be considered in immunocompromised patients with pulmonary infiltrates who do not respond to broad-spectrum antibiotics. Serological tests and CT findings can aid in early diagnosis of IPA, which, along with treatment for IPA, will improve clinical outcomes.
Birth of Cone Bipolar Cells, but Not Rod Bipolar Cells, Is Associated with Existing RGCs
Ling Bai, Takae Kiyama, Hongyan Li, Steven W. Wang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0083686
Abstract: Retinal ganglion cells (RGCs) play important roles in retinogenesis. They are required for normal retinal histogenesis and retinal cell number balance. Developmental RGC loss is typically characterized by initial retinal neuronal number imbalance and subsequent loss of retinal neurons. However, it is not clear whether loss of a specific non-RGC cell type in the RGC-depleted retina is due to reduced cell production or subsequent degeneration. Taking advantage of three knockout mice with varying degrees of RGC depletion, we re-examined bipolar cell production in these retinas from various aspects. Results show that generation of the cone bipolar cells is correlated with the existing number of RGCs. However, generation of the rod bipolar cells is unaffected by RGC shortage. Results report the first observation that RGCs selectively influence the genesis of subsequent retinal cell types.
A focused liquid jet formed by a water hammer in a test tube
Akihito Kiyama,Yoshiyuki Tagawa,Keita Ando,Masaharu Kameda
Physics , 2015,
Abstract: We investigate motion of a gas-liquid interface in a test tube induced by a large acceleration via impulsive force. We conduct simple experiments in which the tube partially filled with a liquid falls under gravity and impacts a rigid floor. A curved gas-liquid interface inside the tube reverses and eventually forms an elongated jet (i.e. the so-called a focused jet). In our experiments, there arises either vibration of the interface or increment in the velocity of a liquid jet accompanied by the onset of cavitation in the liquid column. These phenomena cannot be explained by considering pressure impulse in a classical potential flow analysis, which does not account for finite speeds of sound as well as phase change. Here we model such water-hammer events as a result of one-dimensional pressure wave propagation and its interaction with boundaries through acoustic impedance mismatching. The method of characteristics is applied to describe pressure wave interactions and the subsequent cavitation. The proposed model is found to allow us to capture the unsteady features of the liquid jet.
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