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Search Results: 1 - 10 of 800 matches for " Mie Shiraishi "
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Pelvic floor function and advanced maternal age at first vaginal delivery  [PDF]
Mikako Yoshida, Ryoko Murayama, Maki Nakata, Megumi Haruna, Masayo Matsuzaki, Mie Shiraishi, Hiromi Sanada
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.34A005
Abstract:

Purpose: The study aimed to show differences in temporal recovery of pelvic floor function within 6 months postpartum between women having their first delivery at an advanced age and those having their first delivery at a younger age. Methods: Seventeen women (age: 35.5 ± 3.5, BMI: 21.1 ± 3.2) were studied at about 6 weeks, 3 months, and 6 months after vaginal delivery. Urinary incontinence was assessed by the International Consultation on Incontinence Questionnaire-Short Form. Pelvic floor function was assessed by the anteroposterior diameter of the levator hiatus using transperineal ultrasound. Women who delivered for the first time at 35 years and/or older were defined as being of advanced maternal age. Results: Nine of 17 women (52.9%) were of advanced maternal age and 5 experienced postpartum stress urinary incontinence. Four of these 5 women (80.0%) were of advanced maternal age. The anteroposterior diameter of the levator hiatus at rest was significantly greater in the advanced maternal age women than in the younger maternal age women at 3 and 6 months postpartum (p < 0.01). Among the continent women, the anteroposterior diameter of the levator hiatus at rest was significantly greater in the advanced maternal age women than in the younger maternal age women at 6 months postpartum (p = 0.004). However, among the advanced maternal age women, all parameters of the anteroposterior diameter of the levator hiatus were not significantly different between the women with and without stress urinary continence. Conclusion: Recovery of pelvic floor function following delivery may be delayed in women of advanced maternal age at first delivery because of the damage to the pelvic floor during pregnancy and vaginal delivery, resulting in increase in the incidence of stress urinary incontinence.

The effects of an exercise program on health-related quality of life in postpartum mothers: A randomized controlled trial  [PDF]
Megumi Haruna, Etsuko Watanabe, Masayo Matsuzaki, Erika Ota, Mie Shiraishi, Ryoko Murayama, Mikako Yoshida, SeonAe Yeo
Health (Health) , 2013, DOI: 10.4236/health.2013.53058
Abstract:

Background and Objective: There is controversy on the psychological effects of postpartum exercise. The study aimed to evaluate the effectiveness of a postpartum exercise program on health-related quality of life and psychological well-being. Methods: We conducted a randomized controlled trial in Tokyo, Japan. The intervention groups participated in ball-exercise classes (weekly exercise of 90 minutes for four weeks) at three months postpartum. The exercise class included the following: 1) greeting and warm-up; 2) aerobic exercise involving bouncing on an exercise ball 55 or 65 cm in diameter; 3) rest and self-introduction; 4) stretching and cooling down. The primary outcome measure was health-related Quality of Life (QOL) assessed using the MOS Short-Form 36-Item Health Survey (SF-36v2). The secondary outcome measures were Rosenberg Self-Esteem Scale (RSES) and Edinburgh Postnatal Depression Scale (EPDS) scores. The intervention group was compared to the control group at four months postpartum. Results: Of the 120 women screened, 110 women met the study criteria. Nine could not be included and the remaining 101 were allocated randomly into intervention and control groups (50 and 51 participants respectively). Analysis of covariance adjusting for baseline values indicated that the SF36 subscales of physical functioning (p = 0.018) and vitality (p = 0.016) significantly improved in the intervention group compared to the control group, although there were no significant differences between the groups in the SF36 Physical Component Summary (PCS) and Mental Component Summary (MCS) scores. The RSES increased in the intervention group (p = 0.020) compared to the control group. No significant group differences were observed in EPDS scores. Conclusions: The postpartum exercise class program provided to healthy postpartum women appears to have contributed to promoting health-related QOL and self-esteem.

Does Antenatal Fear of Childbirth Predict Postnatal Fear of Childbirth? A Study of Japanese Women  [PDF]
Mizuki Takegata, Megumi Haruna, Masayo Matsuzaki, Mie Shiraishi, Tadaharu Okano, Elisabeth Severinsson
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.52017
Abstract: The study aimed to determine whether antenatal fear of childbirth (expectation) could predict postnatal fear of childbirth (experience) by taking account of other antenatal psychological variables (anxiety and depression) as well as birth outcomes in Japanese women. A longitudinal observational study was conducted at a clinic in Tokyo, Japan, in 2011. Self-report questionnaires were distributed to 240 Japanese women at 37 gestational weeks (Time 1) and on the second day after delivery (Time 2). Regression analyses by means of structural equation modelling were conducted in both the primiparous and the multiparous group. The models exhibited good fit (chisquare value/degree of freedom = 1.10 - 1.62, comparative fit index = 0.92 - 0.99 and root mean square error of approximation = 0.03 - 0.07). Antenatal fear of childbirth was the most predictive variable of postnatal fear of childbirth in both the primiparous (β = 0.58, p = 0.002) and the multiparous group (β = 0.62, p < 0.001). In conclusion, antenatal fear of childbirth was a significant predictor of postnatal fear of childbirth when other antenatal psychological variables and birth outcomes were taken into account. Pregnant women who are strongly afraid of childbirth need special attention before and after delivery.
Psychometric Evaluation of the Japanese Wijma Delivery Expectancy/Experience Questionnaire Version B  [PDF]
Mizuki Takegata, Megumi Haruna, Masayo Matsuzaki, Mie Shiraishi, Tadaharu Okano, Elisabeth Severinsson
Open Journal of Nursing (OJN) , 2017, DOI: 10.4236/ojn.2017.71002
Abstract: The Wijma Delivery Expectancy/Experience Questionnaire (W-DEQ) is a widely accepted approach to measuring fear of childbirth and is available in two versions: antenatal (version A) and postnatal (version B). The aim of this study was to develop the Japanese W-DEQ version B and confirm its validity and reliability among Japanese women. A self-administered questionnaire incorporating the translated Japanese W-DEQ (JW-DEQ) version B and the anxiety subscale of the Hospital Anxiety and Depression Scale (HADS) was distributed to Japanese mothers at two days postpartum. Of the 246 women recruited, 231 who completed the questionnaire at two days postpartum were analyzed. An exploratory factor analysis of the JW-DEQ version B revealed four factors: fear, lack of positive anticipation, isolation and riskiness. The JW-DEQ version B exhibited a positive correlation with the HADS anxiety subscale (r = 0.34, p < 0.001). The Cronbach’s α value derived from the total 33 items was 0.95. This study provides evidence of the factorial, concurrent validity and the internal consistency of the JW-DEQ version B. However, a further study involving participants from different demographic groups will be required.
Validity and reproducibility of folate and vitamin B12 intakes estimated from a self-administered diet history questionnaire in Japanese pregnant women
Mie Shiraishi, Megumi Haruna, Masayo Matsuzaki, Ryoko Murayama, Satoshi Sasaki, Sachiyo Murashima
Nutrition Journal , 2012, DOI: 10.1186/1475-2891-11-15
Abstract: A sample of 167 healthy subjects with singleton pregnancies in the second trimester was recruited at a private obstetric hospital in metropolitan Tokyo from June to October 2008 (n = 76), and at a university hospital in Tokyo from June 2010 to June 2011 (n = 91). The dietary intakes of folate and vitamin B12 were assessed using the DHQ. The serum concentrations of folate and vitamin B12 were measured as reference values in the validation study. To assess the reproducibility of the results, 58 pregnant women completed the DHQ twice within 4-5 week interval.Significantly positive correlations were found between energy-adjusted intakes and serum concentrations of folate and vitamin B12 (r = 0.286, p < 0.001 and r = 0.222, p = 0.004, respectively). After excluding the participants with nausea (n = 121), the correlation coefficient for vitamin B12 increased to 0.313 (p = 0.001). When participants were classified into quintiles based on intakes and serum concentrations of folate and vitamin B12 , approximately 60% were classified in the same or adjacent quintile. The intraclass correlation coefficients of the two-time DHQ were 0.725 for folate and 0.512 for vitamin B12 .The present study indicated that the DHQ had acceptable validity and reproducibility for assessing folate and vitamin B12 intakes in Japanese pregnant women.Low birth weight is a major cause of perinatal morbidity and low birth weight babies are susceptible to cardiovascular disease in later life [1]. The incidence of low birth weight increased in Japan from 6.3% in 1990 to 9.6% in 2007 [2]. One possible reason for the low birth weight is low intake of micronutrients during pregnancy [3,4]. For instance, folate and vitamin B12 deficiency can lead to retardation of fetal development through hyperhomocysteinemia, which negatively affects DNA methylation and cell proliferation [5-8]. Assessment of an individual's nutritional status including folate and vitamin B12 is therefore important to prevent the harmful
Measuring Qualities of XML Schema Documents  [PDF]
Tin Zar Thaw, Mie Mie Khin
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.69056
Abstract:

The Extensible Markup Language (XML) is becoming a de-facto standard for exchanging information among the web applications. Efficient implementation of web application needs to be efficient implementation of XML and XML schema document. The quality of XML document has great impact on the design quality of its schema document. Therefore, the design of XML schema document plays an important role in web engineering process and needs to have many schema qualities: functionality, extensibility, reusability, understandability, maintainability and so on. Three schema metrics: Reusable Quality metric (RQ), Extensible Quality metric (EQ) and Understandable Quality metric (UQ) are proposed to measure the Reusable, Extensible and Understandable of XML schema documents in web engineering process respectively. The base attributes are selected according to XML Quality Assurance Design Guidelines. These metrics are formulated based on Binary Entropy Function and Rank Order Centroid method. To check the validity of the proposed metrics empirically and analytically, the self-organizing feature map (SOM) and Weyuker’s 9 properties are used.

A Simulation Approach to Statistical Estimation of Multiperiod Optimal Portfolios
Hiroshi Shiraishi
Advances in Decision Sciences , 2012, DOI: 10.1155/2012/341476
Abstract: This paper discusses a simulation-based method for solving discrete-time multiperiod portfolio choice problems under AR(1) process. The method is applicable even if the distributions of return processes are unknown. We first generate simulation sample paths of the random returns by using AR bootstrap. Then, for each sample path and each investment time, we obtain an optimal portfolio estimator, which optimizes a constant relative risk aversion (CRRA) utility function. When an investor considers an optimal investment strategy with portfolio rebalancing, it is convenient to introduce a value function. The most important difference between single-period portfolio choice problems and multiperiod ones is that the value function is time dependent. Our method takes care of the time dependency by using bootstrapped sample paths. Numerical studies are provided to examine the validity of our method. The result shows the necessity to take care of the time dependency of the value function. 1. Introduction Portfolio optimization is said to be “myopic” when the investor does not know what will happen beyond the immediate next period. In this framework, basic results about single period portfolio optimization (such as mean-variance analysis) are justified for short-term investments without portfolio rebalancing. Multiperiod problems are much more realistic than single-period ones. In this framework, we assume that an investor makes a sequence of decisions to maximize a utility function at each time. The fundamental method to solve this problem is the dynamic programming. In this method, a value function which expresses the expected terminal wealth is introduced. The recursive equation with respect to the value function is so-called Bellman equation. The first order conditions (FOCs) to satisfy the Bellman equation are key tool in order to solve the dynamic problem. The original literature on dynamic portfolio choice, pioneered by Merton [1] in continuous time and by Samuelson [2] and Fama [3] in discrete time, produced many important insights into the properties of optimal portfolio policies. Unfortunately, since it is known that the closed-form solutions are obtained only for a few special cases, the recent literature uses a variety of numerical and approximate solution methods to incorporate realistic features into the dynamic portfolio problem such as Ait-Sahalia and Brandet [4] and Brandt et al. [5]. We introduce an procedure to construct the dynamic portfolio weights based on AR bootstrap. The simulation algorithm is as follows; first, we generate simulation
Hatching enzyme of Volvox: a possible implication in the evolution of multicellularity
Hideaki Shiraishi
Journal of Biochemical Technology , 2008,
Abstract: Not Available
Low-Energy Interaction of a Cosmic String and an Extreme Dilatonic Black Hole
Kiyoshi Shiraishi
Physics , 1995, DOI: 10.1088/0264-9381/13/6/027
Abstract: The interaction of a cosmic string and a maximally charged dilatonic black hole is studied in the low-velocity limit. In particular, the string-black hole scattering at a low velocity is investigated.
Extreme Dilatonic Black Holes on a Torus
Kiyoshi Shiraishi
Physics , 1995,
Abstract: The interaction of maximally-charged dilatonic black holes on $R^{4}\times T^{d}$ is studied in the low-velocity limit. In particular, the scattering of two black holes on $R^{4}\times S^{1}$ is investigated.
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