The Villages,Florida: Small-town Metropolitanism and the ‘Middle of Nowhere’

With over 110,000 inhabitants , The Villages is the world's largest retirement community. Its numerous distinct ‘villages’, surrounded by artificial landscaping and golf courses and served by three ‘downtowns’, cater to those who crave the idealised rural life of times gone by while also offering the convenience and stimulation of the modern metropolis. Deane Simpson , leader of the Master's programme in Urbanism and Societal Change at the Royal Danish Academy of Fine Arts School of Architecture, investigates.     

Lee J. Cronbach: Distinguished Scientific Contribution Awards for 1973.

Recognizes receipt of the APA Distinguished Scientific Contribution Award for 1973 by Lee J. Cronbach, known for his contributions to psychometric theory and application. Dr. Cronbach's biography and accomplishments are presented, along with the award citation and a listing of the recipient's scientific publications. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

香港历史地段“再生”案例的可持续性评价

香港针对历史建筑更新的政策中,一个显著特点是对历史建筑实施综合开发利用。不过,香港的历史城区再生计划,却并不支持对其进行综合再利用的方式。因此,不少人批评,香港的城市特色也正在大规模的城区重建当中不断失去。近几十年来,香港的历史城区在再生重建过程中,许多以前的城市集体空间或社区邻里空间都被纳入了私人发展商再开发的范畴。围绕香港利东街——这个香港市区重建局与民间保护团体之间存在激烈冲突的案例,通过可持续性评价分析,探讨了香港的历史城区,如何在城市保护过程中达到发展地方经济、建立和谐社区、以及繁荣当地旅游业的多重目标,从而实现香港城市的可持续发展。     

不同入口流速下生物质锅炉尾部烟气凝结的数值研究

生物质燃料燃烧后所产生的烟气中含有大量的水蒸气, 在锅炉尾部添加冷凝换热器回收冷凝热可以有效提高系统热效率。选用的生物质燃料烟气中水蒸气的体积分数为27.9%, 基于Mixture模型并选用Lee模型作为冷凝传质模型对尾部烟气凝结的传热传质特性进行了数值模拟研究。假设流动为稳态, 湍流模型采用标准k－ε模型, 求解选用Simple算法, 研究了烟气侧不同入口流速下(1~4 m/s)温度场、流场及液态水体积分数的变化规律, 对翅片管换热器的表面传热系数及换热量进行了对比分析。计算结果表明, 随着入口流速的增加, 烟气出口温度逐渐升高, 壁面凝结速率不断增大, 而冷凝水量逐渐减少, 同时翅片管换热器的表面传热系数及换热量逐渐增加。     

Interest patterns for certain degree groups on the Lee-Thorpe Occupational Interest Inventory.

Means, standard deviations, and the percentiles corresponding to the mean scores, are given for the ten scales of the L-T Inventory, for Arts students (N=2380), Chemists (N=170), and Engineers (N=578). The differences between the mean scores for the Arts group differ, on every scale, from the means for the Engineer group by an amount significant at the one per cent level; the mean scores for the Arts group differ from those for the Chemist group on seven scales; the mean scores for the Chemists differ from the means for the Engineers on five scales, at the same level of confidence. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Coxeter图的正定性

本文用线性代数的方法证明了李代数中正定的Coxeter图仅是A_1,B_1,D_1,E_1,F_4和G_2六种类型。     

外源硒对茎瘤芥硒形态及硒吸收的影响

采用大田实验研究叶面喷施硒(0.0、1.0、2.5 mg/L)对茎瘤芥生长、硒形态、硒吸收和转化的影响。结果表明,叶面喷施1.0 mg/L的硒提高了茎瘤芥的产量,但未达到显著水平(P0.05)。叶面喷硒降低了茎瘤芥硝酸盐含量,在一定程度上增加了茎瘤芥游离氨基酸、VC、还原糖的含量,分别较对照增加了40.41%、13.36%和46.73%。叶面喷施硒后茎瘤芥中全硒和有机硒含量分别较对照增加了46.1%~193.9%和74.0%~271.5%,并且随外源硒质量浓度的升高而显著增加。随硒质量浓度的增加,茎瘤芥有机硒转化率显著提高,1.0、2.5 mg/L硒处理分别较对照增加了19.33%和23.57%。茎瘤芥吸收的硒主要以有机硒的形式存在,茎瘤芥全硒和有机硒含量与外源硒质量浓度呈极显著正相关(P0.01)。     

Quotients of Gaussian graphs and their application to perfect codes

A graph-based model of perfect two-dimensional codes is presented in this work. This model facilitates the study of the metric properties of the codes. Signal spaces are modeled by means of Cayley graphs defined over the Gaussian integers and denoted as Gaussian graphs. Codewords of perfect codes will be represented by vertices of a quotient graph of the Gaussian graph in which the signal space has been defined. It will be shown that any quotient graph of a Gaussian graph is indeed a Gaussian graph. This makes it possible to apply previously known properties of Gaussian graphs to the analysis of perfect codes. To illustrate the modeling power of this graph-based tool, perfect Lee codes will be analyzed in terms of Gaussian graphs and their quotients.     

电感耦合等离子体法测定桂郁金中的微量元素

以桂郁金为原料,经浓硝酸-双氧水(30％)处理后用微波消解样品,以电感耦合等离子体发射光谱法(ICP-AES)测定其中的Na、B、Mg、Al、P、Ca、Ti、Zn、Ba、Mn、Fe、K含量,Li、Be、Tl、Mo、Pb、Cd、Sr、V、Cr、Cu、Ni、Co等元素的含量则以电感耦合等离子体质谱法(ICP - MS)测定.方法的准确性用国家一级标准物质GBW - 10015、GBW - 10020对比分析证实.试验结果表明:桂郁金中富含Fe、Mn、Ti等微量元素,其中Fe含量最高为360μg/g,而Be、Cd、Mo、TI、V含量较低,均低于1μg/g.该法快速简便、准确率高、精密度好,完全可以满足样品中元素含量测定要求.     

李家坑古村旅游景观规划

介绍了宁波四明山李家坑古村的旅游景观规划方案,提出了以"领略清新的山居文化,体验静谧、隐逸、简朴的山居生活"为特色,以开发符合山村特色的亲农、休闲活动,达到最大程度上减少对古村的破坏和带动农村更新建设以及旅游业的发展的双重目的.