我国能耗监测管理现状及未来发展趋势

适应节能形势发展的新变化,能耗监测的内涵也正在逐步延伸。实践表明,建立有效的能耗监测管控体系,对于提高能效、推进节能减排作用明显。近年来我国能耗监测管理得到了不同程度的改善,但在管理理念、制度安排、技术创新、资金支持等方面还存在着较多问题。利用信息技术,建立能耗在线实时监测管理体系,将成为未来能耗监测的发展目标。适应这种发展要求,我国需要在计量设备基础管理、能耗监测考核制度、监测机构设置和人员培训、资金渠道等方面进行不断创新。     

The impact of population growth and climate change on food security in Africa: looking ahead to 2050

Providing nutritious and environmentally sustainable food to all people at all times is one of the greatest challenges currently facing society. This problem is particularly acute in Africa where an estimated one in four people still lack adequate food to sustain an active and healthy life. In this study, we consider the potential impact of future population growth and climate change on food security in Africa, looking ahead to 2050. A modelling framework termed FEEDME (Food Estimation and Export for Diet and Malnutrition Evaluation) was used which was characterized to model the impacts of future climate changes (utilizing the Intergovernmental Panel on Climate Change Special Report on Emissions Scenarios projections) and projected population growth on food availability and subsequent undernourishment prevalence in 44 African countries. Our results indicate that projected rapid population growth will be the leading cause of food insecurity and widespread undernourishment across Africa. Very little to no difference in undernourishment projections were found when we examined future scenarios with and without the effects of climate change, suggesting population growth is the dominant driver of change. Various adaptation options are discussed, such as closing the yield gap via sustainable intensification and increasing imports through trade and aid agreements. These strategies are likely to be critical in preventing catastrophic future food insecurity.     

Constructing the culinary consumer: transformative and reflective processes in Italian cookbooks

This paper explores how culinary texts operate in both performative and transformative senses in relation to wider societal norms of gender and cultural capital. As such, the paper explores changes to the way in which the culinary consumer is presented in British Italian cookbooks from 1954 to 2005. Across the period, we see a shift in the gendered representation of the culinary subject, from a housewife in the period 1954–1974, to a working mother from 1975 to 1986, and most recently as male or female cook from 1987 to 2005. We also see shifts in representation of cultural capital in these same periods from learning new cooking skills, to adapting existing cooking skills to displaying skills in shopping and product selection. In charting these changing discourses, we find that whilst reflecting wider culinary culture, these cookbooks also act in a transformative sense to promote (and indeed require) specific enactments of gender and cultural capital.     

The eruption of Airbnb in tourist cities: Comparing spatial patterns of hotels and peer-to-peer accommodation in Barcelona

In recent years, what has become known as collaborative consumption has undergone rapid expansion through peer-to-peer (P2P) platforms. In the field of tourism, a particularly notable example is that of Airbnb. This article analyses the spatial patterns of Airbnb in Barcelona and compares them with hotels and sightseeing spots. New sources of data, such as Airbnb listings and geolocated photographs are used. Analysis of bivariate spatial autocorrelation reveals a close spatial relationship between Airbnb and hotels, with a marked centre-periphery pattern, although Airbnb predominates around the city's main hotel axis and hotels predominate in some peripheral areas of the city. Another interesting finding is that Airbnb capitalises more on the advantages of proximity to the city's main tourist attractions than does the hotel sector. Multiple regression analysis shows that the factors explaining location are also different for hotels and Airbnb. Finally, it was possible to detect those parts of the city that have seen the greatest increase in pressure from tourism related to Airbnb's recent expansion.     

Rituals of cruise consumption and the 'new' middle class: desiring and 'devouring' maritime cruises

The consumption of maritime cruises is one of the most striking facets of the phenomenon of a new middle class emergence in Brazil. This study investigates the use of maritime cruises by emerging middle-class consumers to enact their new social status. Specifically, the research looks at ritualistic behaviour performed by consumers before, during, and after a cruise. The research uses a multi-method design characterised by a combination of ethnography and group discussions. The study contributes to enlarge McCracken’s typology of consumption rituals, showing how emerging consumers use the cruise as a rite of passage, during which they perform rituals of preparation, production, possession, and divestment. It also sheds light on specific rituals performed by consumers in order to transfer meanings from the cruise to their own selves. Finally, the findings suggest that consumption rituals in the context of social ascent may not have the transformative power of traditional rites.     

Why do customers switch? More satiated or less satisfied

This study investigated whether restaurant customers switch to other restaurants due to satiation or diminished satisfaction. To achieve its objectives, this study extended well-known relationships among perceived quality, satisfaction, and behavioral intentions by including satiation and further examined the role of satiation on switching intentions. The results of this study showed that satiation was negatively associated with satisfaction but differed from diminished satisfaction. Further, the study results endorsed that satiation significantly influenced switching intentions, whereas satisfaction did not. This supports that customers switch to other restaurants not because they are less satisfied but because they are satiated. Regarding the relationship between perceived quality and satiation, service quality and food quality considerably reduced satiation levels, whereas physical surroundings were associated with an increase in satiation. In addition, satiation fully mediated the relationship between perceived quality and switching intentions, which emphasizes the importance of satiation in customer switching intentions. Findings and implications are provided in the main body of this paper.     

Conceptualizing the brand in social media community: The five sources model

The emergence of social media is challenging the ways that marketing academics and practitioners conceptualize and manage brands. This research explores the consumers׳ specific motivations for the purpose and structure of the consumption of brands in social media community. Keeping the evolving economic relevance of social consumption in mind, the resulting conceptual model has been designed to give a better understanding of the unique branding opportunities and relationships that social media present to brand managers. The research employs a triangulated method that includes a social media-based Facebook focus group and face-to-face interviews. The findings suggest that consumers expect some very specific two-way interactions with brands and that social media may be the only way to effectively deliver these demands. This study identifies five core drivers of brand consumption in a social media community articulated in the Five Sources Model: functional, emotional, self-oriented, social and relational. These core drivers represent unique opportunities for brands to enhance their relationships with their customers and to increase the likelihood of an active and beneficial online community built around their brands. Future research implications are discussed.     

Food scandals,media attention and habit persistence among desensitised meat consumers

Consumer reactions to food scandals and their resulting economic implication are well documented. However, studies have typically neglected the roles that consumption habits and media usage behaviours may play in explaining household’s response to food safety incidences. In this study we develop a model of heterogeneous media usage intensity, information impacts and decay over time to estimate household’s behavioural responses to the 2011 German Dioxin scandal. We are specifically interested in determining the degree of heterogeneity in household’s short-term adjustments demand patterns versus persisting long-term consumption habits of meat products (chicken and pork) directly affected by the incident. The empirical analysis employs detailed household-level retail scanner and media usage data collected by the GfK Consumer Scan panel for a total of 16,023 households over a period of 104 calendar weeks. Results of dynamic correlated random effect Tobit models indicate an important role of unobserved heterogeneity in explaining household responses during the food scandal. We find strong empirical evidence supporting our hypothesis that short-term marginal adjustments in demand and propensity to buy affected products triggered by the negative impact of household media exposure were over-compensated by habit persistence. The question of how consumption patterns evolve over time in the presence of food scandals is expected to be of interest for both policy makers and the food industry. The potential biases in the projection of economic impacts resulting from simplifying assumptions of household’s response patterns to a proliferating numbers of food safety incidences has implications for risk management and public policy.     

Total Factor Productivity and Energy Intensity: An Empirical Study of China’s Cement Industry

China is the largest cement producer and consumer in the world. The cement industry’s rapid growth has led to a large demand of energy. This study reviews China’s cement industry in terms of energy intensity and examines the effects of technological progress on energy intensity. It also discusses the feasibility of achieving China’s energy reduction targets. We employ the Granger causality test and find that the total factor productivity or technological progress causes the energy intensity of the cement industry. Impulse responses analysis also proves that in the long run the technological change contributes to the decline in energy intensity of cement production.