科普须防“失真”，“失声”，“失效”

为了提高对科普工作的重视程度,依靠动员科学家推动科普事业,加强科普资源建设,创新科普活动,针对科普工作和活动经常出现“权威性不够”,“针对性不足”,“实效性不强”等问题。根据长期从事农业科普工作的实践,对科普“失真”,“失声”,“失效”现象产生的原因进行了深入思考,提出了解决这些问题的主要对策建议。     

E‐commerce,Transportation, and Economic Geography

ABSTRACT This paper explores possible ways in which growth in Internet retailing (e‐retailing) may affect the spatial distribution of economic activities. After a brief overview of e‐retailing, a categorization of possible spatial impacts is introduced. These include impacts on the retail industry, such as substitution of e‐retail for brick‐and‐mortar retail, impacts on transportation, such as substitution of freight transportation for personal transportation in goods delivery, and pervasive impacts that affect the whole economy. The latter category includes uniform delivered pricing, spatial leveling of accessibility, and marketing strategies that target individuals rather than regions. The question of whether e‐retailing and brick‐and‐mortar retailing are truly substitutes is taken up in the next section, along with potential implications of multi‐channel retailing. The final section of the paper defines some critical research directions.     

Molecular analysis of softening and ethylene synthesis and signaling pathways in a non-softening apple cultivar, ‘Honeycrisp’ and a rapidly softening cultivar, ‘McIntosh’

A feature of ‘Honeycrisp’ apples [Malus sylvestris (L.) Mill var. domestica (Borkh.) Mansf.] is that they maintain flesh firmness over extended storage. The objective of this study was to elucidate molecular mechanisms that are responsible for slow softening of ‘Honeycrisp’ as compared with a rapidly softening cultivar, ‘McIntosh’. Fruit from both cultivars were picked during the normal harvest period and stored at 20 °C for 10 d. Internal ethylene concentrations (IECs) in ‘Honeycrisp’ fruit were lower than in ‘McIntosh’, but at climacteric levels of ethylene ‘Honeycrisp’ fruit maintained their firmness over this period, while ‘McIntosh’ softened rapidly. Concentrations of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) were higher in ‘Honeycrisp’ than in ‘McIntosh’ apples. qRT-PCR analysis was carried out for genes involved in ethylene biosynthesis, perception and signaling [ACC synthase (MdACS); ACC oxidase (MdACO); ethylene receptors (MdETR and MdERS); constitutive triple response (MdCTR); ethylene response factor (MdERF)], as well as those involved in cell wall metabolism [polygalacturonase (MdPG); xyloglucan endotransglucosylase (MdXTH); expansin (MdEXP); β-galactosidase (Md β-GS); arabinofuranosidase (MdAFase); pectate lyase (MdPL)]. At comparable IECs, the expression of genes involved in ethylene synthesis, ethylene perception and signal transduction was generally much higher in ‘Honeycrisp’ than in ‘McIntosh’ fruit. However, the expression of MdAFase and MdEXP3 was generally lower in ‘Honeycrisp’ than in ‘McIntosh’, while that of MdPG and MdPL was extremely low in ‘Honeycrisp’. Expression of MdPG1 was very low, even though IECs were at climacteric levels. Absence of fruit softening in ‘Honeycrisp’ is probably associated with restricted cell wall enzyme activity. The lower maximum IECs found in ‘Honeycrisp’ compared with ‘McIntosh’ do not appear to be related to expression of genes involved in ethylene biosynthesis.     

Reflections on the “Old” Economy, “New” Economy,and Services

ABSTRACT Economic competitiveness now has less to do with new materials than with new ways of producing, utilizing, and combining diverse knowledges. It is branded as symptomatic of a “new” economy and is often juxtaposed against the “old” economy. As accelerating technological change has greatly increased the volume and quality of the information available to organizations, to firms, and to individual employees, it is asserted that the economy has become more “new” than “old.” But this is predicated on the assumption that there is a “new” economy and that it is somehow distinguishable from the “old.” This paper explores the basis for this dichotomy and whether it really adds anything to understanding contemporary economies and their ongoing development. It will be argued that it is more useful and constructive to examine the economy through a lens dominated by service industries that are now the key drivers of change (innovation, competition, employment) and development. The paper is concluded with a discussion of some items that could usefully be part of an agenda for further research by economic geographers on the evolving spatial and structural attributes of service work and organizations and their impact on cities or regions at different scales of analysis.     

Ethnicity,State Violence,and Neo‐Liberal Transitions in Post‐Communist Bulgaria

State socialist nationalization policies in the 1980s severely impacted the ethnic Turkish and Muslim regions of Bulgaria, while neo‐liberal economic strategies have subsequently further deepened their economic crisis. This paper focuses on the ways in which policies of regional economic marginalization, cultural assimilation, and population expulsion have deeply marked the people and places of the Kurdajli region of southeastern Bulgaria. The paper shows how mass unemployment arose quickly after 1989 as a result of the closure of branch‐plants, and assesses the role of social networks and non‐capitalist economic practices in the Muslim communities during this period of economic immiseration. The paper shows how these legacies of state policy and social practice have provided flexible opportunities for the resurgence of apparel assembly for export, referred to locally as ‘Klondike capitalism’. The paper concludes with a discussion of the extent to which the history of violence has influenced the processes of internationalization in the region, and how we are to think about the relationship between regional mass unemployment and sectorally specific industrial revitalization.     

No Man's Brand—Brands,Institutions, and Fashion

ABSTRACT Branding has become so intertwined with consumption that today's consumers have often deeply personal relationships to brands and brand histories. Branding is an attempt to strategically “personify” products and to encapsulate a balance between different economic values: quality, utility, symbolic, and cultural worth. In this paper we argue that the relationship between the contemporary consumer and producer is mediated by and governed by a reflexive construction of brands. As such brands are best understood from an institutional perspective. The paper illustrates the institutional role of brands by using the example of the fashion industry. It is argued that in the fashion industry, a focus on consumer‐producer brand‐building and brand loyalty is central to the commodity and value chains built around products. We conclude by suggesting that economic geography has consistently undervalued brands as an area of study. By taking brands as a core product in industrial production rather than as an interesting aside for sociologists, historians, and cultural theorists, economic geography can better understand the institutions governing the economy. In particular, better understanding the institution of brands helps us better appreciate the dynamics systems within which commodities and commodity chains are formed.     

高产、双抗型小麦新品种‘川麦51’产量、抗病性等特征分析

为了明确新品种的增产潜力和加快新品种的推广应用,实现新品种的应用价值,通过方差分析、多重比较等方法对小麦新品种--‘川麦51’的产量、抗病性等特征进行比较分析。‘川麦51’是四川省农科院作物研究所选育的一个中筋小麦品种,该品种在2年的区试试验中分别比对照增产12.6%和14.2%,生产试验中比对照增产11.4%。采用DPS软件进行区域试验分析的结果表明,‘川麦51’具有良好的丰产性、稳产性和稳定性。抗病性鉴定结果表明,‘川麦51’高抗条锈病和中抗白粉病,能够抵御频繁爆发条锈病和偶发白粉病的四川气候条件。综合评价认为‘川麦51’具有较高的推广应用价值。     

Urban–Rural Differences in Internet Usage,e‐Commerce,and e‐Banking: Evidence from Italy

ABSTRACT By reducing the cost of performing isolated economic activities in remote areas, information technology might serve as a substitute for urban agglomeration. The paper assesses this hypothesis using data on Italian households' usage of the Internet, e‐commerce, and e‐banking. The results do not support the argument that the Internet reduces the role of distance. Internet usage is much more frequent among urban consumers than among their non‐urban counterparts. The use of e‐commerce is basically unaffected by the size of the city where the household lives. Geographically remote consumers are discouraged from purchasing goods by the fact that they cannot inspect them beforehand. Leisure activities and cultural items (i.e., books, CDs, and tickets for museums and theaters) are the only goods and services for which e‐commerce is used more in isolated areas. Finally, e‐banking bears no relationship to city size. In choosing a bank, non‐urban customers give more importance to personal acquaintance than do urban clients, partly because bank account holders in remote areas are more likely to have taken out a loan from their bank.     

Optimale Stickstoffdüngung aus ökonomischer Sicht in Abhängigkeit von Standort, Vorfrucht, Bodenbearbeitung, Phosphat- und Kalidüngung sowie Sortenwahl

Economically optimal N-fertilization as influenced by location, preceding crop, cultivation of soil, phosphatic and potassic fertilization and choice of variety.
– The economically optimal quantity of N-fertilization is mainly influenced by location, preceding crop, cultivation of soil, phosphatic and potassic fertilization and choice of variety. The optimal organization of these factors, however, to the extent that it can be influenced by the farmer, is a precondition of an effective N-fertilization.
– Depending on the above-mentioned factors the economically optimal quantity of N-fertilization shows a great variation. In the majority of cases the optimal N-quantity to winter wheat ranges between 100 and 180 kg/ha and to sugar beets between 120 and 200 kg/ha.     

Shaping the Rural–Urban Symbiosis: Density,Dispersal, Remoteness,and Town Size in South‐East Australia

Within the context of economic and social change in rural Australia, this paper identifies four structural dimensions of non‐metropolitan communities that are shown to influence a range of areal and socio‐demographic characteristics. The analysis shows that such influence is essentially maintained whether the social catchments forming the database are subdivided by State or by an equivalent number of landscape types. Also, although the dimensions influence both the urban and dispersed elements of the communities, the strength of the relationships is substantially greater if those elements are considered as a symbiotic whole. Throughout, net rural local density (as opposed to gross density) is shown to be a consistently important dimension of rural communities in relatively sparsely settled lands such as those of south‐eastern Australia, supported by the important subsidiary influence of relative settlement dispersal and town size. The paper concludes with a discussion of the processes involved in the impact of those structural dimensions upon rural society.     

Place,memory and identity: Imagining ‘New Asia’

Abstract: The rapid transformation of Asian societies and landscapes, especially since the mid‐1990s, has engendered much conjecture of the ‘Asian renaissance’ and the rise of a ‘New Asia’. This Special Edition of Asia Pacific Viewpoint explores the intersecting themes of ‘urban place’, ‘social memory’ and ‘cultural identity’ in the articulation of and contestation towards New Asia. Specifically, the six articles here offer various interpretations of New Asia – as tourism marketing tool, political vision and social identity – and the politics involved in urban, tourism and cultural development. From colonial hotels in key South‐East Asian cities to the historic waterfront of Singapore; from festivals and rituals in Hong Kong, Hoi An (Vietnam) and Penang (Malaysia) to the clash of cultural values in Manggarai (Indonesia), ‘selective remembering’ and ‘ideological forgetting’ are central to the construction of New Asian identities. Ultimately, this Special Edition hopes to provoke continuing discussions on the rhetoric of New Asia and its imaginative and contested geographies, sociologies and histories.