内江农作物品种区试存在的问题及对策

农作物新品种区域试验是育种成果转化为生产力最重要的中间试验,是实施“种子工程”的重要内容之一。我市自八十年代以来,对六大农作物水稻、玉米、红苕、棉花、油菜除每年承担省区试外,还由市种子管理站组织了全市新品种区域试验,是全省各地、市、州组织区试作物最多的单位之一。通过区试,各大作物示范、推广了一批已审定的新品种,普     

西藏自治区农作物新品种选育又有新突破

今年,西藏农牧科研部门实施的“农作物新品种选育”项目通过推行首席专家负责制,加强区域联合与资源整合,已在农作物优异种植资源引进、创新与利用方面取得成效,并在杂交组配、优良品系观察、品系产量比较和区域试验等方面取得新的进展与突破。目前,共观测鉴定农作物亲本材料1285份,     

农作物品种权综合价值评估指标体系构建

结合经济学和农学的相关理论,从法律、经济、技术、社会4个层面,构建农作物品种权综合价值评价指标体系,并利用该方法对两种普通玉米品种权价值进行评估。本指标体系是遴选具有推广价值和应用前景农作物新品种的重要依据,也是新品种交易时考量农作物品种权综合价值的有效工具。     

大豆新品种“东生2号”培育成功

日前,中科院东北地理所培育的又一大豆新品种通过了黑龙江省农作物品种审定委员会的审定,品种命名为“东生2号”,并于今年4月经黑龙江省农作物品种审定委员会审定为推广品种。这是东北地理所科技人员继2003年成功培育大豆新品种“东升1号”后取得的又一可喜成果。     

UML状态机与框架技术在嵌入式系统中的应用

嵌入式系统中运用UML状态机和框架复用技术,在提高嵌入式系统开发效率、保证系统可靠性及系统可维护等方面有积极意义。相对于传统有限状态机,用UML状态机描述的嵌入式系统具有高度结构化、逻辑清晰、图形可视等特点。以基于Quantum Platform框架在嵌入式系统的应用为例,介绍了一种基于 UML状态机的图形化建模开发和代码自动生成方法。该方法基于Quantum Platform框架以及相关开发组件,具有快速开发、方便调试、多平台移植、支持底层8位/16位低端单片机等特点。     

农作物新品种的培育

农作物新品种的培育对农业增产、增收的贡献越来越大。农作物新品种的培育和很多生物学知识都有密切的关系,是生物高考联系生产实际的重要内容,在高考试题中经常出现。农作物新品种的培育一方面是改变农作物的遗传物质,产生新的满足人们需要的新的遗传性状,从这层意义上来说,育种方法有:杂交育种、诱变育种、单倍体育种、多倍体育种、基因工程育种、细胞工程育种等。另一方面,目前实际生产中培育农作物新品种的方法还有:植物组织培养、培育无籽果实等,但这类培育方法并没有改变农作物的遗传物质,只是改变了农作物的性状。这些方法的原理、具…     

让农民享受到最新的科技成果——“全国优秀科技工作者”、衢州市农作物技术推广站站长卢王印

卢王印,衢州市农作物技术推广站站长,推广研究员。1986年毕业于浙江农业大学,一直从事农作物新技术新品种的试验研究和示范推广工作,曾任衢州市种子公司经理,农作站党支部书记。现为市“115人才工程”第一层次人选,衢州市第三、四届拔尖人才,省十佳优秀科技工作者、省农学会、省作物学会理事,2008年起享受政府特殊津贴。     

大豆新品种垦豆38选育及高产稳产性分析

本文介绍高产、稳产、抗倒伏、适应性广的大豆新品种垦豆38号的选育经过、主要特征特性、栽培技术和高产稳产性分析。垦豆38原品系代号为垦08-9007,是黑龙江省农垦科学院农作物开发研究所于2003年以垦丰16为母本,合丰48为父本有性杂交,系谱法选育而成。2015年通过黑龙江省农作物品种审定委员会审定命名推广。     

高产优质抗病大豆新品种——黑农51特征、特性及高产栽培技术

黑农51高产优质抗病大豆新品种是黑龙江唐农业科学院大豆研究所于1996年以黑农37为母本,合93-1538为父本进行杂交,经系谱法选育而成。原品系代号为哈99-5307,2007年经黑龙江省农作物品种审定委员会审定命名推广的高产优质抗病大豆新品种,并取得国家新品种保护权,目前在尚志市适应区内已大面积推广应用。     

玉米新品种南北一号特征特性及高产栽培技术

南北一号玉米新品种是哈尔滨南北农业科学研究所以自选系江134为母本,以自选系北268为父本,利用杂交方法选育而成。原代号为南北431,2007年经黑龙江省农作物品种审定委员会命名推广的玉米新品种,该品种2008年在我市进行大面积示范,产量可观,2009年开始大面积推广应用。     

Students' Reactions to the Introduction of Videoconferencing for Classroom Instruction

This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors.     

Cooler temperatures inductive to locust outbreaks

Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007.     

Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class

A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction.     

The Role of Intermediating Institutions in the Diffusion of Electronic Data Interchange (EDI): How Industry Associations Intervened in Denmark, Finland, and Hong Kong

Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies.     

Low doses of a red wine ingredient figh diabetes in mice

Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said.     

How Electronic Publishers are Protecting Against Piracy: Doubts About Technical Systems of Protection

The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means.     

Rough Justice: A Statistical Assessment of ICANN's Uniform Dispute Resolution Policy

Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP.     

Prevalence of soft neurological signs in Chinese people

Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.     

Molecular motor assembly of a biomimetic system

Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction.     

Monoculture Rubber Plantations Have Negative Ef ects on Controlling Splash Erosion

<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence