物流园区实施消防安全目标化管理的探讨

指出了物流园区实施消防安全目标化管理的重要性,对物流园区实施消防安全目标化管理的内容和对策进行了探讨。     

Ontological security as an unconscious motive of social media users

ABSTRACT

Reactions to nostalgia-evoking content on social media platforms like Facebook and YouTube suggest an unconscious motive of ontological security, defined as a ‘sense of presence in the world as a real, alive, whole, and in a temporal sense, a continuous person’. In addition to the unprecedented access to the past provided by social media, additional factors such as increasing human longevity, the acceleration of technological and social change, the expanded size and greater interconnectedness of social networks, the proliferation of directly and vicariously experienced places and the secularisation of society have contributed to a growing need for ontological security. Engagement with nostalgia-evoking social media content fulfils the need for ontological security by reintegrating memories of the past into an ongoing, self-affirming narrative or ‘life story’, while the digital archiving of photos and videos offers the possibility of ‘digital immortality’ for a virtual self that can be projected into the future.     

Effects of the Chinese arable land fallow system and land-use change on agricultural production and on the economy

This study focuses on economic effects of arable land fallow system and land-use change in China using a dynamic single-country, multi-regional computable general equilibrium model. Land supply is adjusted endogenously in our model. Land use in each of 31 provinces is tracked by a land-use change module, which is calibrated with satellite data. Our results reveal that the expansion of real output can be attributed to the increase in capital stock as a result of the growth of investment due to the imposition of the arable land fallow system in China. And the growth of investment is caused by the release of labor from agriculture The reduced supply of arable land in agricultural land contraction regions is partially offset by the increasing arable land in agricultural land expansion regions. Rural households benefit more than urban households from the arable land fallow policy due to relatively higher income and lower rural CPI.     

The impact of the stapled security structure on the quality of financial disclosure: Evidence from Australian Real Estate Investment Trusts and Listed Infrastructure Funds

This paper is the first study to explore whether the stapled structure influences firms’ activities in earnings management (EM). Trusts and firms under stapled securities are exposed to various managerial opportunities and activities that can provide the flexibility of using EM approaches. Therefore, the stapled structure is expected to induce increased EM behavior and signal a lower level of financial disclosure quality than the unstapled structure. This empirical research analyzes a panel dataset that contains information of Australian REITs (A-REITs) and Listed Infrastructure Funds (LIFs) from the year of 2000–2017. Evidence shows that stapled A-REITs and LIFs use a greater magnitude of EM approaches than unstapled entities. The results imply that the stapled security structure may signal lower-quality of financial disclosure for firms than the unstapled security structure. This study provides additional insight into the understanding of how the security structure may impact firms’ financial disclosure behavior.     

计算机网络安全中防火墙技术的应用

当前,随着计算机网络技术的广泛应用,各个行业、领域都离不开网络技术,网络技术早已成为推动社会生产发展的重要力量。网络技术虽然为社会生活带来巨大便利,但其也存在诸多安全隐患,对于社会民众的信息安全构成种种威胁。因此,保障网络安全的重要性日益凸显。论文围绕计算机网络安全中防火墙技术的应用展开讨论,希望能为实际网络安全问题的有效处理提供一定的参考。     

Classification of various attacks and their defence mechanism in online social networks: a survey

Due to the popularity and user friendliness of the Internet, numbers of users of online social networks (OSNs) and social media have grown significantly. However, globally utilised, social networks are the consequence of the lack of understanding of secrecy and protection on OSN and media has increased. Secrecy and surety of OSNs need to be inquired from various positions. According to recent studies, OSN users expose their private information such as email address, phone number etc. In this paper, we have presented a high-level classification of recent OSN attacks for recognising the problem and analysing the blow of such attacks on World Wide Web. We have also discussed OSN attacks on different social networking web applications by citing certain recent reports such as Kaspersky security network and Sophos security threat report. We also offer some simple-to-implement user practice tips to protect the system and user’s information. In addition to this, we have discussed a comprehensive analysis of numerous defensive approaches on OSN security. Lastly, based on the acknowledged strength and faults of these defensive approaches, we have explained open research issues.     

The Endogeneity of Trading Volume in Stock and Bond Returns: An Instrumental Variable Approach

This paper investigates the joint determination of trading volume and returns. Our approach follows from the argument that trading activity depends on security returns, thus resulting in a reverse causality from returns to trading activity. Using exogenous instruments for security trading activity, we estimate a system of two‐stage simultaneous equations to better model the return‐volume relationship. Our results confirm that returns and trading volume are determined simultaneously in both stock and corporate bond markets and that conclusions about the direction and significance of causality between volume and returns can be reversed once one corrects for the endogeneity of volume.     

Collaborative research on Conservation Agriculture in Bajío,Mexico: continuities and discontinuities of partnerships

Agricultural technologies are debated and contested. Studying the socio-political life of agricultural research can help us to understand why some particular technologies or pathways are favoured (and others not) and eventually why expectations are maintained or not. We studied the 30-year trajectory of practices of Conservation Agriculture in the central region of Mexico. The results of our interviews and literature review show how, over the course of time, Conservation Agriculture (CA) technology has successively changed from being referred to as Conservation Tillage, Direct Seeding, Conservation Agriculture and has now, finally become integrated within Sustainable Intensification. These changes are connected with revamped narratives and the applications of the latest research and development (R&D) paradigms. They were the result of new spaces for CA projects opening up after other spaces had closed, spaces that allowed the researchers, politicians, technicians and farmers to continue to engage in CA in a reconfigured way that fit the various agendas. The opening and closure of spaces for CA projects were the result of researchers being subject to, and taking advantage of, political changes and of politicians seeking new initiatives to support their agendas. This shows how research and politics are mutually dependent and how they generate a discontinuity of project interventions which, paradoxically, represent a continuity of agendas and research processes. As CA is both a complex and flexible technology, it has been possible to make it fit to accommodate the changing agendas of different actors.     

The influence of African swine fever information on consumers’ preference of pork attributes and pork purchase

This paper uses a randomized survey instrument to study the impact of African Swine Fever (ASF) information on Chinese consumers’ preference for pork attributes and purchases during the recent peak of the ASF pandemic in 2019. We study consumers’ preference for pork attributes including brand, meat texture and taste, quality safety assurance, and traceability under different information treatments. Results show that the willingness to pay (WTP) for quality safety assurance is the highest, followed by brands and traceability systems, and the WTP is lowest for good taste. We show that providing detailed ASF information substantially changes consumer preference by altering the relative importance of pork attributes and price sensitivity, which enables consumers to focus more on safety-related attributes while paying less attention to price and taste attributes. Furthermore, we find that a higher belief in the future of ASF occurrence reduces the frequency of purchases marginally but does not significantly influence for amount per purchase and the total purchase amount.     

Terrain ruggedness and limits of political repression: Evidence from China’s Great Leap Forward and Famine (1959-61)

Chairman Mao Zedong’s Great Leap Forward development plan strongly affected food security in rural China at the time, given that many of the associated policies exploited rural labor and extracted resources. A few months after the plan’s initial implementation in August 1958, food shortages were reported; by the spring of 1961, more than 30 million citizens had died of starvation and famine-related illnesses. However, as the national plan was rolled out and then upheld over three years, on-the-ground implementation was nonuniform. Using georeferenced terrain ruggedness data which captures small-scale topological irregularities and information on provincial leadership attitudes towards Mao’s plan, I provide evidence on forces underlying the famine’s intensity and distribution. The analysis is based on a differential effect, in which a fear-based incentive structure characterizing the plan’s implementation is implicitly embedded. The baseline results indicate that rugged terrain protected more than 4.6 million rural Chinese from dying in the famine. By identifying an additional benefit of ruggedness to health and well-being in some rural communities, I show that not only does a causal relationship exist at a local level between Great Leap policies and famine mortality, but also that the lethality of the policies varied per state power at the time.