Factor Structure and Measurement Invariance of the Japanese Version of the Mother-to-Infant Bonding Scale

Background: Bonding disorders affect the growth and development of infants. In Japan, the Japanese version of the Mother-to-Infant Bonding Scale (MIBS-J) is widely used for early detection of bonding disorders. Repeated use of a questionnaire has problems of reduced validity. In order to correctly detect bonding disorders at multiple time points, it is necessary to confirm the measurement invariance of the scale. Baba et al. reported that invariance of the MIBS-J factor structure could only be obtained by abridging the scale into three items. Purpose: The aim of this study was to 1) confirm the factor structure and measurement invariance of the MIBS-J between two measurement times and 2) to examine factors that can be used without being affected by measurement time in order to identify item that contribute to measure met invariance. Methods: We analysed the data of 1049 and 878 mothers with a neonate collected in two waves: 5 days (Wave 1) and 1 month postpartum (Wave 2). Exploratory and confirmatory factor analyses were conducted on the data randomly divided into two groups in each wave. Results: The three-item model (MIBS-J items 1, 6, and 8) was most accepted. Measurement invariance and structural invariance were confirmed in the model. This was consistent with Baba et al.’s model. Conclusion: The three MIBS-J items showed measurement invariance and structural invariance in Japanese mothers during 1 month postpartum.

Relationship between the different replication status of HBV and mutations in the core promoter in mothers and their children infected via mother-to-infant transmission

OBJECTIVE: To study the relationship between the different replication status of hepatitis B virus (HBV) and mutations in the core promoter (CP) in mother and her child infected by mother-to-infant transmission. METHODS: The core promoter was amplified by PCR and cloned into pGEM-T vector with the T-A choning technique. The recombinant plasmid pGEM-CP was confirmed by digestion with restriction enzyme Apa I and Sac I. Two clones were selected to be sequenced in each patient. RESULTS: Every pair of mother and child had same serotype and genotype and the homology of nucleotides encoding 'a' determinant was 98%-100%. The number of mutations in the core promoter of patients with a high replication status was less than that in those with a low replication status. Mutations were mainly distributed in basia core promoter (BCP) and the inbibitor region of Kunitz-type serine protease. This difference was not associated with mother or child. CONCLUSION: The different replication status of HBV is caused by mutations in the core promoter in mother and child infected hy mother-to-infant transmission and appears to be not associated with the status of development of the infection.

Risk factors affecting the mother-to-infant transmission of hepatitis B virus: a meta analysis

Objective：To search for risk factors that affect mother-to-infant transmission of hepatitis B virus（HBV）. Methods：To obtain studies eligible for meta-analysis, China biological medicine discs and MEDLINE citations were surveyed. Mother HBV DNA or HBeAg positivity,neonate HBeAg positivity, mode of delivery, threatened abortion and threatened premature labor were processed with meta analysis. Criteria for selection of published studies for meta analysis were based on principle by Abdolmaleky HM. Odds ratio （OR） was calculated and summarized by fixed effect model or random-effects model using RevMan software. The heterogeneity of the group of ORs was assessed using an X^2 test. The significance of the pooled OR was determined by the u-test. The strength of association was assessed using the OR. An OR〉1. 0 indicated a positive association between the risk factor and neonate HBV infection. Results： After meta analysis of factors concerned, a significant association was found between the positivity of HBeAg in mother and neonate, of HBV DNA in mother peripheral serum, and HBV mother-to-infant transmission, with a pooled OR equal to 19.43 （95% CI=8. 77-43. 06）, 36.5 （95% CI= 19.85-67. 11）, and 36.5 （95 % CI= 19.85-67.11 ） respectively. Mode of delivery, threatened abortion and threatened premature labor proved not to be of risk factors on the mother-to-infant transmission of HBV. Conclusion： Mother HBV DNA or HBeAg positivity and neonate HBeAg positivity were proved to be of risk factors affecting the transmission of HBV from mother to fetal.

Maternal Depression and Mother-to-Infant Bonding: The Association of Delivery Mode, General Health and Stress Markers

Aim: The aim of the present study was to examine associations among maternal stress level, general health, mother to infant bonding, maternal depression level, and mode of delivery. Methods: Mothers who delivered a single baby at term were recruited with a total 435 mothers participating in the study. Outcome measures: Data were collected 6 months after delivery using General Health Questionnaire (GHQ-28), Mother-to-Infant Bonding Scale (MIBS), Edinburgh Postnatal Depression Scale (EPDS) as well as socio-demographic and medical information at 6 months. Additionally, salivary cortisol and chromogranin levels were determined. Results: The proportion of breast-feeding mothers in the vaginal delivery group (51.4%) was significantly higher than that of the cesarean section group (24%). GHQ-28 scores were significantly related to EPDS scores and MIBS scores (P Conclusion: Maternal general health is associated with maternal psychological health. These results suggest that the support of maternal health is important to maintain maternal psychological status and bonding to infants. Because EPDS scores were significantly worse in the planned cesarean section group (4.2 ± 3.3), careful management is needed of mothers who deliver by planned cesarean section.

基于多维度数据的业务信息快速共享系统设计

为了提升业务信息快速共享系统的数据共享效率,设计基于多维度数据的业务信息快速共享系统。构建信息共享系统整体架构,并对超级节点以及端节点的构成实施解析,通过Doc2Vec模型对高维数据实施降维处理,实现业务信息向量特征提取,将处理好的信息输入至系统中,通过构建链路优化模型完成信息共享链路的设计。经试验验证,在相同功耗及温度条件下,本系统具有较高的信息共享效率,CPU利用率较高,共享效果较好。

基于5G公网的高速铁路运营线路列车超视距应用系统试验方案研究

为加快推进列车超视距应用系统的开发进程,早日实现该系统的工程应用,提出基于5G公网的高速铁路运营线路列车超视距应用系统试验方案,在北京-张家口高速铁路(简称:京张高铁)开展了列车超视距应用系统的综合性整体试验。试验中全面测试了列车超视距应用系统各项功能及性能,重点验证基于5G公网的车地信息传输通道能够将铁路沿线高清监控视频与安全监测信息实时传输至运行列车上的车载监控终端,在平原地带、山区地带、隧道内、车站附近等不同线路条件下,实时视频、视频点播和危情提示等功能均达到预期效果,系统的稳定性较好。

鹅不食草挥发油治疗过敏性鼻炎作用机理的研究

目的:探讨鹅不食草治疗过敏性鼻炎的作用机理。方法:运用豚草花粉过敏原建立豚鼠过敏性鼻炎的动物模型,通过提取鹅不食草的有效成分,对过敏性鼻炎进行治疗,观察豚鼠鼻黏膜组织形态学的动态病理变化。结果:过敏性鼻炎阳性对照组鼻黏膜上皮组织充血、水肿,炎性细胞浸润,可见大量中性粒细胞、嗜酸性粒细胞、淋巴细胞以及肥大细胞,鼻黏膜上皮细胞出现大量溶酶体、细胞器空泡化、细胞核变形,固有层结缔组织细胞结构紊乱,细胞器呈碎片状。而鹅不食草挥发油治疗组上述变化明显减轻至接近阴性对照组。结论:鹅不食草挥发油对过敏性鼻炎有明显治疗效果。

广东2010年5月一周两次暴雨过程的对比分析

2010年5月中旬,广东省在一周之内连续遭受了两次区域性暴雨过程,其频次之高、雨量之多、强度之大为历史同期所少有。对这两次暴雨过程从水汽输送、动力结构、大气稳定度和雷达特征等方面进行了对比分析。结果表明:两次暴雨过程的环流形势及影响系统不同,水汽输送和辐合强弱与暴雨范围有密切关系,降水强度不但受大气不稳定度影响,动力触发更可能是引发强降水的关键因素;产生暴雨的飑线通过吸收合并其移动前方和沿近地层辐合带新生单体得以维持和发展,飑线上的HP型超级单体是产生降水峰值的主要载体。

BESⅢ触发快控制系统的设计与实现

介绍北京谱仪上的快控制系统的研究与设计。快控制系统主要由6种VME模块组成,它完成系统时钟和快控制命令的扇出和读出状态信号的处理与报警功能。根据不同的要求信号分别使用光纤串行和LVDS标准的差分并行两种数据传送方式。主要逻辑用现场可编程的逻辑器件(FPGA)实现,系统按照高速电路的设计要求设计。

天光一号预放大器电子束产生和传输

论述了天光一号电子束泵浦 Kr F准分子激光预放大器电子束产生和传输系统的研制。针对低电压 ( 40 0 k V)和高电流密度 ( 1 4 3 Acm-2 ) ,重点考虑了二极管真空绝缘界面、电极结构、漂移区长度和主膜支撑等问题并介绍了实验结果 :二极管电压在 4 50 k V以上仍能稳定工作 ,电流上升前沿约2 0 ns,电子束总束能 4 .2 k J以上。只要开关导通时间选在 PFL电压峰值附近 ,Marx建立时间抖动小于2 0 ns,对总束能的影响将小于 5%。

Powertrain Torque Control Based on Torque Observer

To reduce shock during transmission gear shift, a transmission torque feedback closed loop control system is proposed based on the powertrain system model and a torque observer. The ignition time of engine was delayed to reduce transmission output shaft torque during gear shift. In contrast to traditional control method, the closed loop control system based on torque observer can obviously reduce the transmission output shaft torque during gear shift. It can be concluded that by way of torque feedback closed loop control, transmission shift shock can be reduced.

基于ARM的养猪场数据无线传输系统设计

为满足养猪场管理中对数据传输的要求,设计一种基于ARM的养猪场数据无线传输系统。以S3C2410为无线数据传输系统终端核心,与MC55无线模块连接构成嵌入式无线数据传输平台。基于嵌入式Linux操作系统和GPRS数据传输技术,对无线终端的硬件和软件进行设计,同时对数据中心服务器软件进行具体设计。试验结果表明:该系统实现终端与服务器的数据交互,传输接收数据准确。本系统与射频识别技术相结合,可实现养猪场生猪身份代码的实时采集与准确传输。

利用光栅衍射缺级效应探测激光信息的研究

利用傅立叶变换理论研究了激光以任意角度入射平面透射光栅的夫琅和费衍射,通过分析衍射图像的相对光强分布,得到了零级和各级明纹中心位置与入射激光信息之间的关系以及明纹缺级情况。提出了通过增加光阑限制入射角范围,能够仅提取零级和正负一级明纹中心位置坐标,进行数据处理后反向推导出了入射激光的波长和方向与明纹位置的关系,进而获得了计算入射激光参数的方法。根据计算结果提出了采用CCD观测衍射图像、利用高速信号处理数据系统的样机设计方案。在对样机各类参数进行了论证的基础上,推算了样机性能。

磁绝缘线振荡器中空间电荷的辐射

研究了磁绝缘线振荡器中空间电荷的辐射。结果包括 :导出了线性区的增益公式 ,所得到的增益函数相对于同步失配是对称的 ;导出了饱和区的辐射场公式 ,这个公式表明 ,饱和辐射功率近似地与谐波电流的平方成正比。

推力钢带式和链式无级变速器NVH性能研究

研究了推力钢带式和链条式无级变速器的振动噪音特性。对其中的链式无级变速器设计了降噪方案,并进行了噪声优化研究。结果表明:在对钢带和链条无任何降噪措施的前提下,推力钢带式无级变速器噪声水平明显优于链式无级变速器,但在链式无级变速器链条上安装降噪导板后,链式无级变速器整体噪声得到大幅下降,与推力钢带式无级变速器噪声水平接近。

世界银行贷款《华北遥测地震台网联网系统》通过国家地震局验收

叙述了遥测地震台网联网中使用的有线、无线电VHF和UHF地震信号及数字数据的传递技术原理及其方法。

5G无线通信技术的应用前景分析

经历过2G追赶,也经历过3G突破,社会正处在4G同台竞技的高峰期,马上迎来新一代无所不在的移动信息网络—5G无线通线技术。随着我国ICT产业的进一步融合,我国已经进入到了现代化的网络信息时代,移动通信技术在各个方面影响着人们的生活。5G无线通信技术被认为是当前最具有应用前景的技术,可满足用户对移动网络技术的使用需要。文章就5G无线通信技术的优点、5G无线通信的关键技术以及5G无线通信技术的研究意义这几个方面一一进行了阐述。

神经原性因素对小鼠比目鱼肌胞吞作用的影响

本文报道用辣根过氧化物酶 ( HRP)酶标生化方法探讨神经原性因素对小鼠比目鱼肌胞吞作用的影响及其与肌萎缩的关系。坐骨神经鞘内注射秋水仙素诱发比目鱼肌去神经样改变 ,再用脑提取液处理秋水仙素小鼠比目鱼肌 ;用河豚毒素 ( TTX)毛细管埋藏坐骨神经鞘内 ;另将变性神经提取液注入正常及人工冬眠小鼠的比目鱼肌间隙。测定比目鱼肌 HRP摄取的相对含量及肌肉湿重和总蛋白量。结果表明 ,脑提取液可完全消除秋水仙素引起的胞吞摄取增加和肌肉湿重及总蛋白量的减少。河豚毒素比秋水仙素对肌肉的去神经样影响要小 ,变性神经提取液对正常及人工冬眠小鼠的肌肉胞吞摄取明显增强 ,但肌肉湿重及总蛋白量无显著改变 ,提示在生理情况下 ,脑源性神经营养性生物大分子是维持肌肉胞吞稳态的首要因素 ,正常神经支配的肌肉 ,变性神经产物显著诱导胞吞增强 。

提高井下采煤工作面电网电能传输能力的研究

提高采煤作面电能传输能力是当前矿井面临的实际问题,也是推广高效、高产工作面面临的首要问题。本文主要研究如何提高采煤工作面的电能传输能力及其计算方法。

从国外大停电事故看改善输变电建设外部环境的重要性

从美加8·14大面积停电事故中,由输电线路故障、潮流转移,使原在重负荷下运行线路的弛度增加,缩小对地安全距离,进而诱发数条线路相继闪络断开,促使事故扩大的过程分析。论述了美国、意大利输变电建设滞后、在输变电建设中承受的环境压力以及上述国家环境立法行为现状。指出正确认识与科学对待输变电电磁环境暴露影响的必要性。介绍了美国电磁场研究与公众信息传播计划(EMF RAPID)以及世界卫生组织(WHO)EMF 10年计划的研究情况与结论性意见。还介绍了国际非离子辐射委员会(ICNIRP)及美国电力与电子工程师协会(IEEE C95.6)标准的暴露限值。建议在WHO统一指导与协调下,统一认识,主动宣传,积极研究,为输变电建设创造更好的外部环境。