在多变的消费类电子市场中使用可编程逻辑技术

在过去的10年中,消费类电子市场发展速度惊人。生产商推出了大量令人眼花缭乱的新产品,从平板电视、DVD播放机和录像机、无线家庭网络到MP3播放器,还有其他许多花样繁多、功能各异的电子产品。通过提高特性和功能,降低价格、体积和功耗,生产商极大地改进了这些产品。这对于消费者和商家而言,的确是好消息,但对于在激烈的竞争中落败的公司却是一个悲剧,他们投入巨大却悄然而退。     

下一代PCI底板的独特电源管理要求

PCI-Express的成本目前已能与PCI-X的成本相比拟,且很快还会下降.但直至今日,低成本、向后兼容性以及易实现性等优点,都意味着PCI、PCI-X1.0及PCI-X2.0仍将伴随我们一段相当长的时间.     

Variation of Piperidine Alkaloids in Ponderosa (Pinus poderosa) and Lodgepole Pine (P. contorta) Foliage from Central Oregon

We quantified 2,6-disubstituted piperidine alkaloids in Pinus ponderosa and P. contorta needles from three forest sites in April, June, August, and December. Alkaloids were detected on at least one date in 71% of the ponderosa pine and in 29% of the lodgepole pine trees sampled. Pinidine was the major alkaloid constituent of ponderosa pine, while euphococcinine was the predominant compound in lodgepole pine. For ponderosa pine, total alkaloid concentrations were very low at two sites on all dates. At the third site, concentrations were variable but significantly higher on all dates. Total alkaloid concentrations in previous-year foliage from this site were highest in April, then significantly lower from June through December. Current-year foliage collected in August and December had significantly higher alkaloid concentrations than previous-year foliage on the same dates. Variation in foliar nitrogen concentrations accounted for some of the alkaloid variation in current-year foliage sampled in August.     

LXI联盟为成功测试制定新标准

LXI融合了测试和测量行业近几年来的多项成果。第一是明确了以T＆M为中心的专有技术转向计算机行业技术。在测试应用中越来越多地采用Ethernet、PC和PC标准软件充分说明了这一方向。Ethernet在测试和测量用户中变得日益流行,因为它成本低、适应性好、有高带宽的LAN接口,以及越来越强大的网络管理能力。第二是IEEE 1588的发布,把确定性的定时同步引入LAN。电信和工业自动化行业已普遍接纳这一标准,IEEE 1588的纳秒级定时能力也能很好适应T＆M应用的要求。第三是用户已认可网络接口的价值,并且非常流行,他们现在能用该接口访问仪器和应用信息,并与世界各地的同事共享仪器屏幕。     

高度集成的可编程单芯片传感器解决工业系统设计中的难题

传感器对工业系统设计中的性能、可靠性、安全性和自身成本等方面具有提供重大改进的潜能.涉及惯性传感器的应用案例包括平台稳定性、工业机器的运动控制、安全性设备、天线稳定性、机器人技术、导航、机械调平以及许多其它的应用.     

Microstructure of Athabasca bituminous sand by freeze-fracture preparation and transmission electron microscopy

The technique of freeze-fraclure has been used to prepare samples of bituminous sand and emulsions for electron microscopy. This provides substantial information about the volatile (primary aqueous) fractions of these systems. Evidence is presented that the water component in the bituminous sands occurs mainly as a water-in-oil emulsion in the interstitial spaces, not as a layer around the mineral particles.     

Make today count: A collaborative model for professionals and self-help groups.

Presents a narrative report of a field study in which members of a self-help research team provided services of significant, positive impact to one chapter of Make Today Count, a self-help group composed of cancer patients, their spouses, and health care professionals. A collaborative model is formulated. Important elements of this model include adequate knowledge of self-help processes, enhancement of rapport through acceptance of the group, and adoption of a consultive approach. Nonproductive modes on interaction observed between other professionals and chapter members are discussed. The present results are contrasted with negative results reported previously by professionals who attempted to collaborate with a similar self-help population, but who applied a different model. (16 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Upper San Pedro Basin: fostering collaborative binational watershed management

Successful binational planning and management of water resources is a complex process dependent on informed decision‐making across diverse economic, social and political sectors. Additional technical and scientific information is often required as a part of this process. A critical factor in this process is how effectively social and physical scientists can help build collaboration and trust among stakeholders, water and land managers, and policy‐makers. Within the international San Pedro River Basin, disparities between Mexico and the USA regarding economic development and political orientation, combined with a highly variable and complex physical setting, suggest that the successful engagement of scientists with communities and stakeholders will be essential for addressing challenges in water management. Based upon concepts associated with collective action theory, adaptive management and conflict resolution, the present paper proposes a process for fostering collaborative binational water management in basins such as the San Pedro that span international borders.