A5046807909- Pregnancy and preeclampsia studies
- Birth, Development, and Health
- Maternal Mental Health During Pregnancy and Postpartum
- Gestational Diabetes Research and Management
- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Synthetic Organic Chemistry Methods
- Assisted Reproductive Technology and Twin Pregnancy
- Folate and B Vitamins Research
- Demographic Trends and Gender Preferences
- Pregnancy and Medication Impact
- Breastfeeding Practices and Influences
- Antenna Design and Optimization
- Child Abuse and Trauma
- Advanced Antenna and Metasurface Technologies
- Prenatal Substance Exposure Effects
- Organic Chemistry Cycloaddition Reactions
- Millimeter-Wave Propagation and Modeling
- Asymmetric Synthesis and Catalysis
- Chemical Synthesis and Reactions
- Attachment and Relationship Dynamics
- Homelessness and Social Issues
- Trace Elements in Health
- Homicide, Infanticide, and Child Abuse
- Child Nutrition and Feeding Issues
Tohoku University
2015-2024
Tokai Gakuen University
2022
Ministry of Education, Culture, Sports, Science and Technology
2022
National Institute for Environmental Studies
2022
Ministry of Health Labour and Welfare
2022
Community Link
2022
Ministry of the Environment
2022
Tokyo Institute of Technology
1985-2013
Tokai University
2009
Miyagi University of Education
2007
The analysis and design of novel planar antennas which can radiate circularly polarized pencil beams in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</tex> -band are presented for the application receiving direct broadcast from a satellite (DBS). This antenna belongs to class slotted waveguide high efficiency is expected principle. A circular two-dimensional aperture located on top plate twofold radial excited by radially inward traveling...
Characteristics of a novel planar antenna which can radiate circularly polarized pencil beam in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</tex> -band are presented for the application receiving direct broadcast from satellite. This belongs to class slotted waveguide antennas and promising performances, especially its high efficiency, have already been predicted theoretically. The measured performance model with diameter 0.6 m, is...
Purpose: To elucidate drug use before and during pregnancy in Japan. Methods: The Japan Environment Children’s Study (JECS) is an ongoing nationwide birth cohort study. We analyzed data from JECS involving cases where drugs were used for 12 months was diagnosed, between the time of diagnosis until week pregnancy, after pregnancy. Results: 97,464 pregnant women. percentages women who had taken one or more supplements 78.4%, 57.1%, 68.8% respectively. Excluding iron supplements, folic acid,...
Hypertension during pregnancy can cause serious problems delivery, such as stroke, premature or low birthweight. Nulliparity is believed to be a risk factor for hypertension pregnancy. However, the relationship between parity and blood pressure determined at home still unknown. We assessed incidence of gestational preeclampsia in 575 nulliparous multiparous women. Also, we examined measured clinic among 530 normotensive pregnant women who received antenatal care maternity hospital Japan....
Objective: To survey prevalence and risk factors for paternal postpartum depression symptoms at one 6 months in Japan.Material methods: The study participants enrolled the prospective birth cohort of an adjunct Japan Environment Children's Study. Postpartum were evaluated using Japanese version Edinburgh Postnatal Depression Scale (EPDS-J). cut-off scores on EPDS-J eight maternal was nine, respectively. multivariate logistic regression included adjustment age, number children family, family...
Abstract Hypertensive disorders of pregnancy (HDP) are associated with poor maternal and neonatal prognoses. Although several studies have indicated an effect secondhand smoke (SHS) exposure on HDP, such evidence is lacking in Japan. Therefore, we analyzed data from the Japan Environment Children’s Study, a large-scale epidemiological investigation, to elucidate possible link between SHS HDP risk. Data were obtained all-birth fixed datasets included information 104,062 fetuses their parents....
Abstract Objective This study aimed to clarify the correlation between 2011 Great East Japan Earthquake and domestic violence (DV) against pregnant females after disaster in Miyagi Prefecture, an area damaged by earthquake tsunami. Methods We analyzed 7600 from June December 2011. The incidence of physical mental DV proportions inland, north coastal, south coastal areas Prefecture nationwide were calculated, a chi-square test was conducted for comparison. risk factors estimated with...
Some studies have suggested that blastocyst transfer is associated with i) imbalance in the secondary sex ratio (SSR) (which favors male offspring), ii) increased incidence of monozygotic twins (MZT). In contrast, others not found these changes. this study, we evaluated association between and SSR MZT, considering potential parental confounders. The Japan Environment Children's Study a large, nationwide longitudinal birth cohort study funded by Ministry Japan. We used large dataset,...
Exposure to several metallic elements has been suggested as a risk factor for gestational diabetes mellitus (GDM), but inconsistent findings have reported. This study aimed examine the association between maternal whole blood concentration of (Hg, Pb, Cd, Mn, and Se) GDM using dataset Japan Environment Children's Study (JECS), nationwide birth cohort study, which was designed adverse effects pre/post-natal exposure hazardous environment.The data 78,964 pregnant women who were participants...
Objective: To survey the frequency and risk factors for father-to-infant lack of affection (LA) anger/rejection (AR) bonding failure at 1 month postpartum.Material methods: The study participants enrolled in prospective birth cohort an adjunct Japan Environment & Children's Study. Bonding failure, psychological distress during pregnancy postnatal depression symptoms were evaluated using Japanese version Mother-Infant Scale (MIBS-J), Kessler 6-item (K6) scale Edinburgh Postnatal Depression...
Involvement of family members, especially grandparents, in genome epidemiological research is important to investigate both genetic and environmental factors common diseases. The aim the present study was establish strategies obtain enough number recruitment, focusing on for Tohoku Medical Megabank Birth Three-Generation Cohort Study. Our main are summarized below. 1) We standardized informed consent process with reference materials help people understand form, 2) we created an invitation...
This study examines the relationship between paternal height or body mass index (BMI) and birth weight of their offspring in a Japanese general population. The sample included 33,448 pregnant women used fixed data, including maternal, infant characteristics, from Japan Environment Children's Study (JECS), an ongoing nationwide cohort study. Relationships BMI [i.e., small for gestational age (SGA) large (LGA)] were examined using multinomial logistic regression model. Since fetal programming...
A single-layer linear-to-circular polarisation converter is proposed for an application to a slotted waveguide planar array. It consists of dipoles which closely couple slot arrays. The method moments clarifies the mutual coupling between and slots on waveguide. Numerical results promise use uniform parallel dipole array as existing linearly polarised measurements using in 22.0 GHz band confirm prediction; axial ratio less than 1 dB negligible insertion loss realised.
A matching slot pair which radiates all the incident power in a circularly-polarised wave is proposed and analysed for use as terminal leaky-wave slotted waveguide array. The position size of slots are numerically optimised to suppress reflection realise desired polarisation tilted beam direction, contributes improving antenna efficiency. It verified experimentally that return loss below –15 dB over 0.1 GHz at 4 band 3 axial ratio bandwidth about 5% direction.
Although there are some reports that low plasma volume or increased cardiac output is associated with developing preeclampsia, few of daily serial hemodynamic data during pregnancy. A total 37 092 home blood pressure (BP) and heart rate (HR) measurements were obtained from 425 normal pregnant women. Heart shock index (SI) gradually by gestational week 32 then decreased, whereas double product (DP) linearly systolic BP DP consistently negatively correlated minimum outside temperature, HR SI...
The aim of the study was to clarify prevalence and determinants inadequate use folic acid supplementation in pregnant Japanese women.This part Japan Environment Children's Study, a nationwide government-funded birth cohort study. We collected information on before during pregnancy characteristics participants using self-administered questionnaire.Among 9849 women who completed data collection for this study, users 92.6% total population varied from 84.5% 96.2% among regions. On basis...
Coupling between slots and slow-wave waveguides in a radial line slot antenna (RLSA) is discussed. Field analysis of the waveguide with surface impedance wall revealed considerable change propagation constant due to coupling. Experiments were performed confirm these results obtain for actual slots. The caused efficiency exhibit its maxima at two separated frequencies. An 60% 50% was measured 11.6 12.4 GHz, respectively, which confirms theoretical prediction. This effect suggests possibility...
Objective: To provide the latest and most promising evidence on prevalence determinants for folic acid supplementation in pregnant women Japan, including differences between interview years across regions.Materials methods: The study participants were enrolled from 15 regional centers Japan January 2011 March 2014. Information use of before during pregnancy characteristics collected using questionnaires, medical chart reviews, interviews by research coordinators.Results: Data 91,538 who...
Abstract Background To examine changes in psychological distress prevalence among pregnant women Miyagi Prefecture, which was directly affected by the Great East Japan Earthquake and tsunami, compare it with other, less damaged areas of Japan. Methods This study conducted conjunction Environment Children`s Study. We examined 76,152 including 8270 Regional Center 67,882 13 other regional centers from all-birth fixed data Children’s then compared risk for 3 years after disaster. Results Women...
The analysis and the design of matching slot pair for a circularly polarized slotted waveguide array are described. position size slots numerically optimized to suppress reflection realize desired polarization in tilted beam direction, which contributes improvement antenna efficiency. A boundary value problem is analyzed taking wall thickness into account order evaluate phase aperture fields accurately. determined on basis this analysis. verified by measuring coefficient, radiation patterns,...