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61.
明清以降,滇池在岁修制度下常年疏浚海口,水域范围基本稳定,但受季风气候影响,其水位存在明显季节性变化,夏秋上涨,冬春下降,主要表现为沿岸低田在雨季即周期性被湖水淹没的特点。随着滇池流域坝田开发趋于饱和,滇池沿岸低田的深水稻“水涨谷”,在明清之际逐步系统种植,实现滨湖低田稻作与滇池水位季节性变化的生态耦合。这种局面到20世纪60年代末彻底改变,入滇河道上游大小水库的修建,使滨湖低田逐渐干田化,水涨谷生长的水域环境发生变化。观察滇池水域环境与稻作生态互动的关系,发现当区域环境呈现出长时段的规律性变化,就可能变“害”为“利”,这是人与自然相处中适应并利用自然的智慧展现。  相似文献   
62.
W. C. Mahaney 《Archaeometry》2013,55(6):1196-1204
The title of Kuhle and Kuhle's (2012) (hereafter K&K 2012) paper in Archaeometry appears to be mostly a tirade against the Traversette Route of Hannibal's Army, as originally favoured by Sir Gavin de Beer—a man possessed of singular scientific experience and near‐singular interest in Carthaginian history—in the mid‐part of the last century. The mere fact that Mahaney et al. (2010a,c) added to de Beer's corpus of evidence that Hannibal followed the southern route appears to have brought K&K (2012) to lodge not only a protest, but one of accusatory tone, stating that Mahaney et al. (2010c) had erroneously misinterpreted historical texts to prove the Col de la Traversette as the Punic Army col of passage into Italia. Aside from the fact that the tone of these allegations rises to a curious level, it is the intention of this discussion to put facts where they belong, rooted in what is known of the Hannibalic Invasion and what is inferred by the prevailing scientific evidence. It is important to note that there is not one preferred route as stated by K&K (2012), but three in fact (see Fig. 1 (a) in Mahaney et al. 2010c), and all have been discussed by a legion of historians (see, e.g., Freshfield 1886, 1899; de Beer 1969; Proctor 1971; Prevas 1998; Mahaney 2008).  相似文献   
63.
The emergence of stone-tipped projectile weaponry was an important event in hominin evolution. A common archaeological approach to identifying projectile weapons is to extrapolate from optimal values of ballistically-relevant attributes as determined from ethnographic North American weapons and modern experiments. Among the most significant of these attributes is “tip cross-sectional area” (TCSA) because it determines a point's efficiency in penetrating an animal. The warranting argument for projecting these data onto prehistoric artefacts is that past “research and development” necessarily led to stone projectiles with optimal TCSA values for a given delivery system. However, our test of this warranting argument, involving analysis of 132 hafted ethnographic Australian stone projectile points and 102 hafted knives, demonstrates that Aborigines did not optimize TCSA values, thus offering a challenge to TCSA-based narratives about the first appearance of projectile weaponry. This illustrates the difficulty of inferring ancient stoneworkers' design intentions from narrowly-defined optimal values. Instead, tool designs should be considered in the context of the reduction sequences that produced them and the dynamics of transmission of those reduction sequences across generations.  相似文献   
64.
Abstract

Much˙ of the physiology of human cells is controlled at their surfaces. Our knowledge is based on an interdisciplinar:r approach involving research in subject areas ranging from physics to medicine. In this review, the structure and function of cell surfaces, their turnover and their role in cell division is described. The concept of cell sulrface diseases is introduced and discussed. The conclusion is reached that further knowledge of cell surfaces will lead to better treatment of many common diseases.  相似文献   
65.
ABSTRACT

Heritage plays a central role in narratives of coastal regions that promote them as places of leisure. This paper compares this role of heritage in Sørlandet (Norway) and the Dutch Wadden Sea area. Both regions have rich and related cultural histories, but at the same time exhibit striking differences in the role of cultural heritage and other aspects of heritage in regional identity narratives that are aimed at attracting tourists. We conclude that while the narratives of Sørlandet affirm a romantic, picturesque image of pre-industrial, societies, those in the Dutch Wadden Sea area frame this region as a pristine and timeless wilderness, in which human history has no place.  相似文献   
66.
Abstract

Between 1860 and 1863 hundreds of men from all over Europe volunteered for service in the wars of southern ‘brigands’ on behalf of the exiled King Francis II of Naples. In an attempt to correct the often biased interpretation of this involvement (that was attributed simply to a thirst for adventure, romanticism or even psychological disorder) that coloured the accounts by Italian patriots, this essay suggests the need for fresh consideration. It develops three lines of inquiry that focus respectively on the strong impact of Italian Unification on conservative and Catholic opinion and the ways in which these sources portrayed the struggles of the southern insurgents, the clumsy efforts made by the Neapolitan government-in-exile to recruit volunteers and organize armed expeditions against the former kingdom, and the so-called ‘white international’ in which the warriors of the counter-revolution were depicted as combatants in conflicts that were both civil wars and at the same time episodes in a much longer international ideological struggle. In this context, the significance of foreign involvement in defence of the Neapolitan Bourbons takes on a significance that goes far beyond its poor military outcome.  相似文献   
67.
广州大都市外围地区二元发展的矛盾及治理   总被引:1,自引:0,他引:1  
范凌云  雷诚 《人文地理》2010,25(1):44-48
结合广州案例选择界定研究范围,从空间形态、产业发展、土地利用、规划管理多方面分析大都市外围地区二元发展矛盾与特征,认为该地区承担了主城"自上而下"的空间外拓和外围撤市(县)设区后"自下而上"式的城镇蔓延。进而运用区域治理理论分析,指出其根源在于双轨城市化路径依赖下,现有规划编制与实施体系难以协调当前城乡二元土地管理制度下不同团体的利益冲突,认为广州应当从传统集权管理转向治理理念的协作方式,由此提出建立"发展需求管理、土地开发共同决策、发展利益分享"三个机制的对策研究。  相似文献   
68.
河南境内的丹江流域、淮河流域及黄河之滨史前文化遗址中,均发现有稻作遗存。有充分的证据证明,史前河南境内的稻是本地种植的。河南所处的黄淮地区是稻粟混作区。  相似文献   
69.
云纹瓦当在洛阳地区的发展与演变   总被引:1,自引:0,他引:1  
瓦当,作为一种建筑构件,其外形或当面图案纹饰在不同时期有着明显的变化,是现代考古发掘与研究工作中确定某一城址或建筑基址时代的可靠标志物。本文通过对洛阳地区出土的东周──魏晋云纹瓦当进行收集与整理研究,确定时代并总结出发展演变规律。  相似文献   
70.
西北干旱区旅游业持续发展研究   总被引:4,自引:0,他引:4  
西北干旱区发展旅游业具有明显的资源优势,本文通过分析西北地区旅游业发展的背景、现状、资源条件和客源市场条件、限制性因素和存在问题,探讨了旅游业持续发展的动力机制,总结出西北干旱区旅游业发展模式并提出了相应的发展对策。  相似文献   
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