Bright solitons and soliton trains in a fermion-fermion mixture

We use a time-dependent dynamical mean-field-hydrodynamic model to predict and study bright solitons in a degenerate fermion-fermion mixture in a quasi-one-dimensional cigar-shaped geometry using variational and numerical methods. Due to a strong Pauli-blocking repulsion among identical spin-polarized fermions at short distances there cannot be bright solitons for repulsive interspecies fermion-fermion interactions. However, stable bright solitons can be formed for a sufficiently attractive interspecies interaction. We perform a numerical stability analysis of these solitons and also demonstrate the formation of soliton trains. These fermionic solitons can be formed and studied in laboratory with present technology.Comment: 5 pages, 7 figure

Spectrum and decays of kaonic hydrogen

By using the non-relativistic effective Lagrangian approach to bound states, a complete expression for the isospin-breaking corrections to the energy levels and the decay widths of kaonic hydrogen is obtained up-to-and-including O(alpha,m_d-m_u) in QCD. It is demonstrated that, although the leading-order corrections at O(alpha^{1/2},(m_d-m_u)^{1/2}) emerging due to the unitarity cusp, are huge, they can be expressed solely in terms of the KN S-wave scattering lengths. Consequently, at leading order, it is possible to derive parameter-free modified Deser-type relations, which can be used to extract the scattering lengths from the hadronic atom data.Comment: 9 pages, 3 postscript figures, epj style. References added, minor revisions in the text, results unchange

Josephson oscillation of a superfluid Fermi gas

Using the complete numerical solution of a time-dependent three-dimensional mean-field model we study the Josephson oscillation of a superfluid Fermi gas (SFG) at zero temperature formed in a combined axially-symmetric harmonic plus one-dimensional periodic optical-lattice (OL) potentials after displacing the harmonic trap along the axial OL axis. We study the dependence of Josephson frequency on the strength of the OL potential. The Josephson frequency decreases with increasing strength as found in the experiment of Cataliotti et al. [Science 293 (2001) 843] for a Bose-Einstein condensate and of the experiment of Pezze et al. [Phys. Rev. Lett. 93 (2004) 120401] for an ideal Fermi gas. We demonstrate a breakdown of Josephson oscillation in the SFG for a large displacement of the harmonic trap. These features of Josephson oscillation of a SFG can be tested experimentally.Comment: 7 pages, 10 figure

The relevance of cognitive dysfunction and comprehension of abstract words

In healthy subjects, the comprehension process is different between abstract words and concrete words. Previous studies reported that the understanding speed is faster and more accurate for concrete words than abstract words; however, this difference is increased in subjects who have language dysfunction due to brain damage. In this report, we focused on abstract words, and investigated how the ability to comprehend them may be used in the evaluation of language acquisition and adult cognitive function. In the literature, studies on the understanding and expression of abstract words rarely included patients with dementia. In this study, we examined the understanding and expression of abstract words in three patients with dementia using the Mini-Mental State Examination (MMSE), the Abstract Word Understanding Test (SCTAW), and a free conversation analysis. The SCTAW results showed that all subjects had scores below the average of the same age group. Moreover, the most common false-reaction pattern was observed, and it was found to be associated with "semantic-related" stimuli, with the same type of error most frequently occurring in healthy subjects. In addition, the results of the conversation analysis showed that MMSE scores and the number of abstract words expressed by the patients tended to be correlated. Therefore, the results suggested that cognitive function was correlated with the number of abstract words expressed.Original Articleothe

Semantic Memory Disorder : Tasks Using Environmental Sounds Performed by 2 Patients with Semantic Dementia

意味記憶の障害を臨床的に把握し、 意味記憶のメカニズムを神経心理学的アプローチにより検討した結果を報告する。 意味性認知症 (以下SD; Semantic Dementia) は語の意味理解が選択的に障害される症状を特徴とし、 その病態の特異性から意味記憶の神経基盤解明のために注目されてきた。 今回、 非言語性意味記憶である、 音声言語と同じ聴覚情報である環境音に着目し、 症例における環境音と音声言語に関する意味記憶について予備的実験を行い比較、 検討した。 結果、 SDにおける意味記憶は、 言語だけでなく非言語性意味記憶である環境音にも障害が及ぶことが明らかとなった。 また、 環境音における非生物カテゴリーの記憶が、 生物カテゴリーの記憶に比べ保たれていた。 今回のテストの結果は、 音声言語と環境音の意味記憶の解離を示した。 このことは、 症状の進行段階のある時点においては意味記憶障害が記憶の貯蔵障害のみで説明できず、 アクセス障害で説明できる可能性を示唆した。Reportdepartmental bulletin pape

Enhancing swallowing reflexes in patients with dysphagia through interferential current therapy

Background: Dysphagia, often caused by aging or disease, is a major focus for speech-language pathologists. Electrical stimulation therapy, including interferential current (IFC) therapy, has recently gained attention in swallowing rehabilitation. This study investigates the effects of IFC on swallowing-related reflexes. Methods: Twenty patients with dysphagia were randomized into stimulation and sham groups. We evaluated reflexes (swallowing, cough, pharyngeal) and swallowing functions (repeated saliva swallow test [RSST], tongue pressure, functional oral intake scale [FOIS], Fujishima grade). IFC therapy was applied for 30 minutes daily, alongside conventional training, over one month. Results: The stimulation group showed significant improvements in cough latency, cough frequency, pharyngeal reflex, RSST, tongue pressure, FOIS, and Fujishima grade. The sham group showed improvement in RSST, FOIS, and Fujishima grade. Conclusion: IFC therapy combined with conventional rehabilitation significantly improved swallowing function in our cohort of patients with dysphagia, particularly cough and pharyngeal reflexes.articl

ADRB2 gene polymorphism and emphysema heterogeneity can modulate bronchodilator response in patients with emphysema

金沢医科大学博士（医学）2017thesi

Construction of next generation mobile video on demand delivery system using broadcast and communication integration environments

Watching high quality videos anytime, anywhere is expected because mobile devices become popular. However, if mobile devices try to watch a video at the same time via a wireless network, the concentrated loads to delivery server cause a delay and a stop of playing videos on client devices. Therefore, in this paper, we realize a mobile video on demand delivery system that mobile devices can watch high quality videos continuously by integrated methods of broadcast and communication. We delvelop the prototype system and have practical experiments to evaluate the proposed system.conference pape

The challenge of improvised explosive devices to International Humanitarian Law

departmental bulletin pape

Modernization and the Family in Japan

日本の家族を、外的及び内的両側面から分析した結果、それは近代的とも伝統的とも断言することはできず、むしろ、近代性と伝統性の両者の調和的融合物であると考えるのが妥当であることが判明した。例えば、本稿で分析した日本の家族の外的、あるいは人口学的要素のことごとくが、日本の家族の近代性を顕著に示していた。つまり、核家族の広汎性、極度に低い出生率とその結果として発生する家族数の縮少化、見合結婚にまさる恋愛結婚の慣行、高齢者人口の飛躍的な増加と平均寿命の伸長、日本の家族のライフ・サイクルと西洋社会のそれとの近似性、フランスや西独と同一レヴェルにまで達した離婚率の上昇などである。一方、今日の日本の家族の内的あるいは構造的特質には、伝統性が失われることなく存続している事実が浮き彫りにされた。つまり、家族のダイナミックスは、夫婦間の横の連結よりもむしろ、世代間の縦の関係に強い絆が存在し、個々の日本人の一生に亘るライフ・サイクルを通して見ると、日本の家族は核家族というよりも、むしろ修正直系家族と呼ぶのがより適切であると思われる。これらの結果は、今日の日本の家族が、外的近代性と内的伝統性の双方の特質を兼備していることを示唆しているといえる。家族の中に見られるこの伝統性と近代性の調和的融合性は、ある意味では、日本社会の近代化の歴史と同様の意味合いを持つといえよう。つまり、日本社会の近代化の過程で、西洋の先進産業技術が熱心に取り入れられた反面、日本の伝統的文化は棄却されることなく依然として堅持されているのである。departmental bulletin pape