爱上不起眼的宝贝

<正>他掌管整个香港食品供应,玩的却是火柴盒、冷门的化石甚至戏院的门票,60余年乐此不疲并自成一家。对香港人而言,"李广林"这名字并不陌生。每逢罐头加价,或米价下调时,屏幕前就会见到他,为大家关心的食品价格来个解说。他和港人的日常生活关系如此密切——他是港九罐头洋酒伙食行商会副理     

Control of rapid aimed hand movements: The one-target advantage.

A series of 8 experiments examined the phenomenon that a rapid aimed hand movement is executed faster when it is performed as a single, isolated movement than when it is followed by a second movement (the 1-target advantage). Three new accounts of this effect are proposed and tested: the eye movement hypothesis, the target uncertainty hypothesis, and the movement integration hypothesis. Data are reported that corroborate the 3rd hypothesis, but not the first 2 hypotheses. According to the movement integration hypothesis, the first movement in a series is slowed because control of the second movement may overlap with execution of the first. It is shown that manipulations of target size and movement direction mediate this process and determine the presence and absence of the 1-target advantage. Possible neurophysiological mechanisms and implications for motor control theory are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A mild solvothermal route for preparation of cubic-like CuInS2 crystals

A mild solvothermal route for preparation of cubic-like CuInS₂ crystals was developed by using benzyl alcohol as the reaction medium and In(NO₃)₃·9H₂O, CuCl₂·2H₂O and thiourea as the precursors. The as-synthesized CuInS₂ crystals were characterized by XRD, XPS, SEM, and TEM. The characterizations showed that the synthesized CuInS₂ crystals had stoichiometric composition and good crystallinity. Moreover, the prepared CuInS₂ crystals show good cubic-like morphology with the size from 100 to 200 nm.     

Collecting Sample Weight Data On Various Liquid Handling Robots

Liquid-handling platforms often do not provide a mechanism for collecting weight data needed for instrument qualification and sample transfer confirmation. This paper discusses the development, implementation, and application of a system that facilitates liquid-handling confirmation required for Good Laboratory Practice (GLP) compliance and provides an avenue to track the amount of sample transferred for extraction.The Balance Data Collector (BDC) system was designed as a flexible generic balance tool to be used with Tecan Gemini© and Packard WinPrep® software. The BDC system provides a user interface for balance configuration, a pointer to a file for storing weight data, and an external interface through command-line arguments. BDC is currently used for instrument qualification and sample collection in bioanalytical applications. Instrument qualification includes refining instrument liquid classes and verifying pipetting accuracy and precision. For bioanalytical applications using 96-well plates, BDC collects individual aliquot weights of samples transferred during an assay.The BDC system provides the user with the capability to control a balance via liquid-handling programming platforms such as Tecan Gemini© and Packard WinPrep®. Integration of liquid-handling platforms and BDC reduces the time the scientist must spend recording weight data needed for GLP compliance and can be used to increase accuracy of calculated sample concentrations.     

美国堪萨斯州EI Dorado炼油厂德士古气化炉采用低值进料的操作经验

介绍了E1Dorado炼油厂采用德士古气化技术的背景资料，着重讨论并总结了该厂采用低值进料的操作运行经验。该厂自装置开车起已经成功利用多种不同低值进料生产运行，产品合成气的质量以及排放物的指标不受各种进料的影响，证实了德士古气化工艺进料范围广的优点。     

Deer Responses to Repellent Stimuli

Four repellents representing different modes of action (neophobia, irritation, conditioned aversion, and flavor modification) were tested with captive white-tailed deer in a series of two-choice tests. Two diets differing significantly in energy content were employed in choice tests so that incentive to consume repellent-treated diets varied according to which diet was treated. When the high-energy diet was treated with repellents, only blood (flavor modification) and capsaicin (irritation) proved highly effective. Rapid habituation to the odor of meat and bone meal (neophobia) presented in a sachet limited its effectiveness as a repellent under conditions with a high feeding motivation. Thiram, a stimulus used to condition aversions, was not strongly avoided in these trials, that included only limited exposures to the repellent. These data support previous studies indicating that habituation to odor limits the effectiveness of repellents that are not applied directly to food, while topically-applied irritants and animal-based products produce significant avoidance.     

Using MODAWEC to generate daily weather data for the EPIC model

Although the EPIC model has been widely used in agricultural and environmental studies, applications of this model may be limited in the regions where daily weather data are not available. In this paper, a stand-alone MODAWEC model was developed to generate daily precipitation and maximum and minimum temperature from monthly precipitation, maximum and minimum temperature, and wet days. A case study shows that the crop yields and evapotranspiration (ET) simulated with the generated daily weather data compare very well with those simulated with the measured daily weather data with low normalized mean square errors (0.008–0.017 for crop yields and 0.003–0.004 for ET). The MODAWEC model can extend the application of the EPIC model to the regions where daily data are not available or not complete. In addition, the generated daily weather data can possibly be used by other environmental models. Associated with MODAWEC, the EPIC model can play a greater role in assessing the impacts of global climate change on future food production and water use.     

FARMTASIA: an online game-based learning environment based on the VISOLE pedagogy

Virtual interactive student-oriented learning environment (VISOLE) is a game-based constructivist pedagogical approach that encompasses the creation of an online interactive world modeled upon a set of interdisciplinary domains, in which students participate as “citizens” to take part cooperatively and competitively in shaping the development of the virtual world as a means to construct their knowledge and skills. FARMTASIA is the first online game designed using the VISOLE philosophy, encompassing the subject areas of biology, government, economics, technology, production system and natural environment. The “virtual world” deployed is a farming system covering the domains of cultivation, horticulture and pasturage, situated in a competitive economy governed by good public policies. The design and implementation of FARMTASIA pursue three vital principles. The first one is to make the game as realistic as possible so that students can learn in a near-real life environment; the second one is to inject motivational elements so that students can sustain to learn and acquire various knowledge and skills with the game; and the third one is to make easy for teachers to conduct various VISOLE facilitation tasks. According to our exploratory educational study, we show evidentially that positive perceptions and an advancement of subject-specific and interdisciplinary knowledge appeared among the students who participated in VISOLE learning with FARMTASIA.