Characterizing disability in Head Start programs: Not so clearcut

Head Start programs are required to set aside at least 10% of program slots for children with disabilities, but the percentage of children with disabilities served varies depending on the criteria used and source of the information. This study used the Head Start Family and Child Experiences Survey (FACES) 2000 data for a nationally representative sample to identify subgroups of children meeting three different criteria for having a disability or developmental delay. Results indicated that about one-third of children in Head Start (33%) met one or more of the criteria for a disability or delay, about one-third of those children (33%) met criteria for two or for all three of the subgroups. However, only 8% of children in Head Start had an Individualized Education Program (IEP). Children with disabilities or delays, regardless of the subgroup criteria used, had higher levels of many other risk factors associated with poor developmental and school readiness outcomes. They also exhibited poorer performance on early literacy, social, and behavioral measures both at entry into Head Start and at the end of kindergarten compared with children not in each of those subgroups. Implications of the findings for screening and assessment, serving children in Head Start programs, and the need for linkages between Head Start programs and the preschool special education system are discussed.     

Examining the Sustainability of an Evidence-Based Preschool Curriculum: The REDI Program

This study examined the extent to which an evidence-based preschool curriculum (Head Start REDI) was sustained by 20 teachers during the year following a randomized controlled efficacy trial, when teachers were no longer required by the research project to implement the curriculum. Two quantitative measures of sustainability (teacher ratings, REDI coach ratings) and a qualitative measure (teacher interview) were collected and compared. Sustainability varied by the specific curriculum component, with higher rates of sustainability for the social-emotional component (Preschool PATHS) than for the language and literacy components. Estimates of sustainability were affected by the method of measurement, with REDI coach ratings and qualitative teacher interviews more closely aligned than teacher ratings. Responses from qualitative interviews identified the main factors that teachers thought affected sustainability. Teacher responses suggest that efforts to promote sustainability are best targeted at reducing barriers, such as competing demands, rather than simply highlighting the benefits of the new curriculum.     

我国后发地区就业与创业工作的难点与对策

由于后发地区在塑造创业精神、把握创业机遇、拥有白领人才及制订长期战略方面都处于劣势，因而造成了就业与创业工作的巨大困难。要解决这些问题，必须根据后发地区的实际情况，在宏观和微观上分别采取相应的对策。     

Correlation of matrix metalloproteinase-2, −9, tissue inhibitor-1 of matrix metalloproteinase and CD44 variant 6 in head and neck cancer metastasis

This study aimed to explore the molecular mechanism in tumor invasion and metastasis. The expression of matrix metalloproteinase-2, −9 (MMP-2, MMP-9), tissue inhibitor-1 of matrix metalloproteinase (TIMP-1), cell adhesion molecule 44 variant 6 (CD44v6), HER2/neu and p53 was investigated in 154 patients with head and neck squamous cell carcinoma (SCC) by ABC and ImmunoMax immunohistochemical method. Their clinical relevance and correlation were analysed. The expression of MMP-2, MMP-9, TIMP-1, CD44v6, HER2/neu and p53 was found in cancer cells in 87.01%, 85.71%, 68.18%, 98.05%, 55.19% and 50.65% cases respectively. Linear regression and correlation analysis revealed that there was close positive relationship (P<0.05) between the expression of MMP-2 and MMP-9, TIMP-1 and CD44v6, HER2/neu and MMP-9, MMP-2 and p53. Up-regulation of MMP-2 was accompanied by advanced T stage (P<0.01). There was also a trend of MMP-2 expression being related with tumor metastasis. Increased expression of HER2/neu was found in patients with tumor recurrence (P<0.05). The expression of TIMP-1 was higher in laryngeal cancer than that in pharyngeal cancer, and higher in keratinizing and non-keratinizing SCC than that in basaloid SCC (P<0.05). These findings suggested that MMP-2 and MMP-9, HER2/neu and MMP-9, MMP-2 and p53 had a coordinate function in aggression of tumor; that MMP-2 had a more important function than MMP-9 in tumor invasion and metastasis; and that HER2/neu might serve as a biomarker for poor prognosis in HNSCC. Project supported by Lübeck Medical University, Germany     

基于D1信号格式的数字视频信号同步技术

本文阐述了如何采用D1信号格式，利用SAV和EAV标志形成视频数字同步信号，在节约大量数字空间的同时有效地实现数字系统的同步。文中还说明了如何利用网络中的“等级制主从同步法”解决电视信号在网络传输中的同步问题．     

基于PLC控制的水头差压力转换提水装置的设计

对水头差压力转换提水装置的工作原理及控制特点进行了分析,使用可编程控制器(PLC)控制系统运行,使系统很好的工作.     

汉语动结式的核心

动结式是句法派生的复合词，其句法核心是为动涮选择论元的功能范畴。将核心确认为功能范畴，不仅可以满足复合蒯的彳了向核心规则，而且可以让核心的信息真正地在复合词中得到保留，如题元信息、范畴信息等。更重要的是，可以借助句法核心解释动结式的句法行为。     

修改硬盘分区表的实用程序

本文分析了硬盘分区表,给出了修改硬盘分区表的C语言源程序。     

Delivering Sure Start in rural communities

This paper explores and questions some of the evidence used to support early childhood interventions in the UK, and reports on discussions with three rural Mini Sure Start project leaders in Devon. Sure Start funding in the UK has been repeatedly increased to provide more centres for 0–3‐year‐olds and their parents. It is increasingly linked to welfare to work policies designed to encourage a culture of ‘hardworking families’ in areas of traditional deprivation. This finds resistance among parents to the idea of combining work and childcare for the under‐3s. It also uncovers the complexity for key workers of trying to implement government directives in areas of rural deprivation.     

一种IC卡读写器系统设计方案

采用X76F100作串行E^2PROM，设计以MCS-51单片机为核心的IC卡读写器系统，可以实现查询、安全存储、修改密码等功能，用户还可以根据需要进行功能扩充．