Fixation of the type species of the genus Protoretepora de Koninck, 1878 (Bryozoa,Fenestrata)

Wyse Jackson, P.N., Reid, C.M. & McKinney, F.K., iFirst article, 2011. Fixation of the type species of the genus Protoretepora de Koninck, 1878 (Bryozoa, Fenestrata). Alcheringa, 1–2. ISSN 0311-5518.

The type species of the Palaeozoic bryozoan genus Protoretepora de Koninck, 1878 was originally fixed as Fenestella ampla Lonsdale in Darwin, 1844, but this taxon has been shown to belong to the bryozoan genus Parapolypora Morozova & Lisitsyn, 1996 Morozova, I. P. and Lisitsyn, D. V. 1996. Revision of the genus Polypora. Paleontologicheskii Zhurnal, 1996(4): 38–47. [English translation: Paleontological Journal30(5), 530–541] [Google Scholar]. The original type species designation for Protoretepora de Koninck, 1878 is set aside, and in accordance with Article 70.3 of the International Code of Zoological Nomenclature (4th edition, 1999) the nominal species Protoretepora crockfordae Wyse Jackson, Reid & McKinney, 2011 from the Permian of Tasmania, Australia is herein fixed as the type species.     

Canadian foreign direct investment in the United States by type: mergers and acquisitions, greenfield, real estate, joint ventures and investment increases

This paper provides an overview of Canadian foreign direct investment (FDI) in the United States by type. Mergers and acquisitions (M&As), greenfield investments, joint ventures, real estate purchases and increases to existing investments are compared spatially, through time (using a data set that consists of transactions from 1977 to 1994) and by industrial classification. Over this study's time-frame, direct investors from Canada were most likely to perform a real estate or M&A transaction in the United States (and least likely to be involved in a joint venture). The most consequential years for real estate purchases were the 1970s and early 1980s; whereas M&A and greenfield transactions have gained in proportionate importance through time. M&As, greenfield and investment increases were most often enumerated as manufacturing transactions, but mining and consumer and business services were also very common. A series of bivariate regression models established that growing state economies significantly increased M&A, real estate, greenfield and investment increase activity from Canada. Relative regional specializations (as given by location quotients) provided additional spatial information. M&As formed a pattern of specialization that emphasized the Great Lakes region and also the central portion of the US (roughly following the Mississippi River). Greenfield and investment increase transactions favoured states along the east coast and those adjacent to the Canada-US border. Real estate investors were most attracted to the US south and extreme west.     

谈庙底沟类型的来源问题

本文认为,主要分布在豫西和晋西南地区的庙底沟类型应来源于当地的东庄类型;而关中地区的同期遗存则可称作泉护类型,由于它与庙底沟类型之间是一种同时共存关系,因而它并不是由后者所派生的.事实证明,泉护类型当来源于半坡类型.     

甘肃旅游资源类型及其空间结构研究

对旅游资源类型及其地域组合、空间结构规律的研究是进行旅游资源开发利用和旅游规划的基础。在分析甘肃旅游资源形成的自然和社会历史文化因素的基础上,利用统计(SPSS)和地信软件(GIS),对甘肃旅游资源类型的地域组合和空间结构进行了定量的分析。首先对甘肃旅游资源以县域为单位,结合甘肃旅游资源特点,参照郭来喜等新拟的旅游资源分类系统,选取23个景型指标,依据其在景区的重要程度分别赋属性值,经专家打分,最后得出各单位景区的各景型指标的属性值。在此基础上把景区的各个景型要素视为多维空间的数轴,由属性值构成指标空间,每个景区都是一个向量。在多维空间中有一个数据点,依据"点"与"点"间的距离进行系统聚类,将全省旅游资源分为5个聚类;然后依据旅游规划的最大福利原则,进行旅游景点的空间聚类分区,将甘肃旅游资源分为7个区,然后将上述聚类和空间聚类在地图上进行叠加,研究其空间组合规律。得出甘肃旅游资源的类型空间组合特点;最后对甘肃旅游资源集中性进行探讨,得出甘肃旅游资源有沿交通线和河流的线状集中、依据中心地级别的等级集中、依据某个中心节点的节点集中和大的区域集中特征。     

广州地铁沿线零售商业形态与空间分布探讨

选取我国地铁发展速度最快的城市之一的广州作为背景,以地铁沿线商用物业的核心圈层为对象,本文在调查分析地铁沿线零售商业的串珠状组团式的空间分布特征和以百货店为主的多业态并存的业态结构特征的基础上,探讨了地铁沿线商业业态聚集的空间等级和各等级的业态空间类型,分析了其内部和外部因素,并揭示了地铁对零售空间分异、商业热点的形成及零售客流的影响作用。     

新型工业化视角中的青海轻工业发展

作为自然矿产资源相对富足的省份,青海产业政策的选择应以优势资源开发为主线。但近些年来工业结构中轻、重工业比例失调日益严重,这必然影响青海省实现工业化的速度和质量。本文试图从新型工业化的视角来分析当前青海省轻工业发展中存在的问题,进而提出发展轻工业的几点建议。     

长三角区域旅游线路模式及目的地类型研究

本文基于旅游社国内观光旅游线路报价单,统计并分析长三角区域旅游线路空间模式的类型、特征,以及长三角地区旅游目的地类型。结果表明,单目的地模式和完全环游模式是长三角地区最重要的两种旅游线路模式;长三角地区各目的地在旅游线路中出现频次存在较大的差异,呈现明显的等级层次;长三角旅游目的地类型主要表现为单一型、门户型以及出口型;通过对旅游线路中各目的出现频次的统计可见,长三角目的地呈现核心——边缘空间结构格局。     

青海省农牧民综合素质的现状及应对策略

建设青海新农村,不仅要发展农牧区经济,增加农牧民收入,而且还要大力培养和造就有文化、懂技术、会经营的新型农牧民。本文针对当前青海农牧区的农牧民综合素质偏低问题,提出要切实把提高农牧民素质摆到重要位置,为培养和造就一大批有文化、懂技术、会经营的新型农牧民创造条件。     

家庭暴力犯罪类型探析

家庭暴力犯罪作为一种复杂的社会现象,是由各种犯罪类型所构成的.本文结合家庭暴力犯罪的特点,按照犯罪学犯罪分类的要求,认为实践中的家庭暴力犯罪大体上按四种类型划分,即根据犯罪客体标准划分,根据犯罪人标准划分,根据犯罪公开程度标准划分,根据案件的诉讼性质标准划分.     

对青海省城市化的经济学思考--以小城镇建设为例

对城市化的研究涉及到多个学科.本文依据城市化的基本要求和基本规律,从经济学的视角对青海省城市化发展过程中的小城镇建设问题进行分析和探索.