Internal Josephson Effects in Spinor Dipolar Bose--Einstein Condensates

We theoretically study the internal Josephson effect, which is driven by spin exchange interactions and magnetic dipole-dipole interactions, in a three-level system for spin-1 Bose--Einstein condensates, obtaining novel spin dynamics. We introduce single spatial mode approximations into the Gross--Pitaevskii equations and derive the Josephson type equations, which are analogous to tunneling currents through three junctions between three superconductors. From an analogy with two interacting nonrigid pendulums, we identify unique varied oscillational modes, called the 0--$\pi$, 0--$running$, $running$--$running$, 2n\pi & running--$2\pi$, $single nonrigid pendulum$, and $two rigid pendulums$ phase modes. These Josephson modes in the three states are expected to be found in real atomic Bose gas systems.Comment: 9 pages, 13 figure

Ferromagnetic Resonance in Spinor Dipolar Bose--Einstein Condensates

We used the Gross--Pitaevskii equations to investigate ferromagnetic resonance in spin-1 Bose--Einstein condensates with a magnetic dipole-dipole interaction. By introducing the dipole interaction, we obtained equations similar to the Kittel equations used to represent ferromagnetic resonance in condensed matter physics. These equations indicated that the ferromagnetic resonance originated from dipolar interaction, and that the resonance frequency depended upon the shape of the condensate. Furthermore, spin currents driven by spin diffusions are characteristic of this system.Comment: 8 pages, 10 figure

Spin echo in spinor dipolar Bose-Einstein condensates

We theoretically propose and numerically realize spin echo in a spinor Bose--Einstein condensate (BEC). We investigate the influence on the spin echo of phase separation of the condensate. The equation of motion of the spin density exhibits two relaxation times. We use two methods to separate the relaxation times and hence demonstrate a technique to reveal magnetic dipole--dipole interactions in spinor BECs.Comment: 4 pages, 5 figure

Kinesiological evaluation of respiration in patients with Parkinson’s disease using optoelectronic plethysmography

　Aspiration pneumonia, a common cause of mortality in patients with Parkinson’s disease (PD), is associated with impaired coughing ability in addition to dysphagia. Kyphosis, bradykinesia, and muscle rigidity reportedly may be involved in the decline of coughing ability; however, the details are unknown. This study aimed to investigate the respiratory impairment that causes the decreased coughing ability in patients with PD using a three-dimensional motion analysis and surface electromyography in terms of respiratory pattern and respiratory muscle activity. The participants were seven patients with PD without history of respiratory or spinal diseases, and seven healthy men of age and matched for body mass index. Using opto- electronic plethysmography, the participants were placed in a sitting posture, and the volume changes of the upper and lower thorax and abdomen were measured during quiet breathing and during deep breathing in the same manner as in the measurement of lung capacity. Surface electromyograms (EMG) were recorded from the second intercostal muscle, the rectus abdominis muscle, and the external oblique abdominal muscle. The normalized EMG data were divided into inspiratory and expiratory times, and the inspiratory and expiratory times were divided into four equal parts over time to examine the trend of changes in muscle activity during deep breathing. In the patients with relatively unadvanced PD, no significant differences from the control in the amount of change in the angle of the spinal column during deep breathing, ratio of each compartment of the chest wall during deep breathing, whereas abdominal compartment was dominant in patients with PD during quiet breathing, and no significant difference in asynchrony between the chest and abdomen was observed. The PD group did not demonstrate increased respiratory muscle activity toward the end of inspiration and expiration, which was observed in the control group. Although the respiratory patterns of the thorax and abdomen in the PD group, whose disease has not relatively progressed, are not different from those of the control group, a significant difference was observed on the EMG, and it is possible that the respiratory muscles could not be effectively utilized according to the inspiratory and expiratory conditions from an early stage

川崎医科大学におけるブース形式診療科別説明会の学内開催

川崎医科大学は,中核市の倉敷市内と政令指定都市の岡山市内に二つの附属病院を有している。両病院の卒後臨床研修プログラムは独立しているが,研修は両方の病院の診療科から選択することが可能である。平成27年7月,初めて川崎医科大学生を対象にした大学附属病院診療科の説明会をブース形式で学内開催した。研修プログラム説明会とは趣を異にし,各診療科の特徴や業務内容を広報することを目的とした。1年生から6年生までの学生が参加し,アンケート調査に回答した52名全員が将来の研修病院の選択に役に立ったと答え,うち27%は非常に役立ったと高い満足度を示した。また,研修医だけで計画した学生向けのミニシンポジウムも同時に開催し,来場した約70%の学生が参加し貴重な情報収集の場となった。次年度以降も改善を加えながら,学生が身近に附属病院スタッフや先輩研修医と交流できるイベントとして育てていきたい。Kawasaki Medical School has one hospital in Kurashiki City, a core city, and another in Okayama City, an ordinance-designated city. These hospitals have independent postgraduate clinical training programs. However, departments of both hospitals can be selected for training. In July 2015, a boothtype meeting regarding Kawasaki Medical School Hospital departments was held for Kawasaki Medical School students for the first time. The intent of the meeting differed from that of other training program meetings, and its goal was to provide information on the characteristics and tasks of each department. First- to sixth-year students participated in the meeting. All 52 students who responded to a questionnaire survey answered that the meeting was useful in helping them select a hospital for their future training, and 27% of them reported that the meeting was very useful and showed high levels of satisfaction. A mini symposium for students planned only by residents was also held at the same time. About 70% of visiting students participated in the symposium and were given a valuable opportunity to gather information. By making improvements, we will cultivate the meeting as an event in which students can have contact with hospital staff and junior residents from the next year

Kinesiological evaluation of respiration in patients with Parkinson’s disease using optoelectronic plethysmography

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