数字接入技术及其在电力通信中的应用探讨

信息时代发展的标志就是电力通信工程的不断更新,网络的带宽不再只是网络工程的追求,更多的转向宽带网络的接入技术.数字接入技术,能够高质量的传输语音、远动数据和远方保护等信号,极具发展意义.本文针对,数字接入技术及其在电力通信中的应用进行简单探讨.     

面向就业的高校学生管理模式初步研究

日益激烈的就业竞争,使传统的高校管理工作面临巨大的挑战,传统的学生管理模式已不能适应社会发展的要求。从钦州学院学生管理工作中存在的问题出发,提出新形势下新的学生管理模式—面向就业的学生管理模式,旨在提高高校的学生管理水平和大学生就业能力。     

Evaluating single sign-on security failure in cloud services

Business use of cloud computing services is motivated by ease of use and potential financial cost reductions. Service failure may occur when the service provider does not protect information or when the use of the services becomes overly complex and difficult. The benefits of cloud computing also bring optimization challenges for the information owners who must assess service security risks and the degree to which new human behaviors are required. In this research, we look at the risk of identity theft when ease of service access is provided through a single sign-on (SSO) authorization, asking: What are the optimal behavioral expectations for a cloud service information owner? Federated identity management provides well-developed design literature on strategies for optimizing human behaviors in relation to the new technologies. We briefly review the literature and then propose a working solution that optimizes the trade-off between disclosure risk, human user risk, and service security.     

Customers,marketing and the network organization

Customers are becoming more demanding. Network organizations are emerging which embrace customers, and are more flexible and responsive to their needs. CEO's increasingly regard customers as part of the organization. Customers are too important to be “left” to one or two directors and their divisions. CEO's are requiring everyone to focus upon the requirements of customers. To help achieve this, organizations are seeking ways of linking remuneration and performance assessment to customer satisfaction. Increasingly customers assume reliability and performance. Quality of itself may no longer differentiate alternative suppliers. In markets in which all suppliers have their quality programmes, managers need to consider what lies beyond quality. Reason is no longer enough. Less tangible factors such as feelings, emotions and values need to be understood. CEO's question whether marketing departments can respond to these and other challenges and help facilitate the changes they are seeking.     

Information Systems for “Wicked Problems”

The objective of this commentary is to propose fruitful research directions built upon the reciprocal interplay of social media and collective intelligence. We focus on “wicked problems” – a class of problems that Introne et al. (Künstl. Intell. 27:45–52, 2013) call “problems for which no single computational formulation of the problem is sufficient, for which different stakeholders do not even agree on what the problem really is, and for which there are no right or wrong answers, only answers that are better or worse from different points of view”. We argue that information systems research in particular can aid in designing appropriate systems due to benefits derived from the combined perspectives of both social media and collective intelligence. We document the relevance and timeliness of social media and collective intelligence for business and information systems engineering, pinpoint needed functionality of information systems for wicked problems, describe related research challenges, highlight prospective suitable methods to tackle those challenges, and review examples of initial results.     

Growing firms and the credit constraint

Restricted access to finance (either debt or equity or both) is potentially a significant constraint on the growth of small businesses. Financing problems arise primarily as a consequence of information asymmetries; the adverse effects of these may in part be counteracted by the use of collateral as a signalling and bonding mechanism and/or by the development of a good working relationship between lender and borrower. If the form of information asymmetry differs for growth firms or if the effects of information asymmetries are less easily ameliorated then growing firms may be more adversely affected by credit constraints. If growth is contingent upon access to credit then the generalised implications for the economy may be significant and detrimental. Using evidence from a survery of over 6,000 firms conducted in 1992, this paper addresses the extent to which growth firms are adversely affected by a credit constraint; the results suggest that the credit constraint for growing firms per se is no greater but growth firms may still experience a credit constraint as a consequence of their relative youth. However, there is evidence to suggest that firms expecting to grow in the future do perceive a rather tighter credit constraint but this may be partly or wholly offset by a generally better relationship with their bank.     

下一代通信网络中基于策略机制的无线资源管理

下一代无线通信系统是一种异构的网络体系，集成多种无线接入技术（Radio Access Technology，RAT）的同时提供多种窄带和宽带多媒体业务。这样的网络环境需要先进的RRM方法来处理复杂多变的无线信道、网络资源的动态配置及保障不同特征业务的服务质量（QoS），给无线资源管理（Radio Resource Management，RRM）带来了巨大的技术挑战。本文通过引入对网络进行策略控制的思想，提出了一种基于策略机制的通用方法，致力于解决下一代异构（heterogeneous）网络中的无线资源管理。文中着重讨论了基于策略机制的网络接入控制、切换，以及基于策略机制的QoS管理，给出了各功能模块的工作原理和通信过程的分析与设计。     

Research note: How a small business enters the international market

As the rate of economic globalization becomes faster and faster, small businesses in the United States can no longer afford to ignore the challenge of international commerce. Small businesses are a key factor in the economies of all nations. Small businesses must develop a global culture, challenge the attitude of key decision makers, gain crucial international experience, and overcome the size barrier. This requires successful entry‐wedge strategies if the company hopes to have any chance of success. Many will need external support in finding ways to access foreign customers. This article provides information that can help small businesses with this venture. © 2001 John Wiley & Sons, Inc.     

Negotiator affect: the state of the art (and the science)

Negotiation, once regarded by researchers as essentially a cognitive process through which parties with non-identical preferences allocate resources through joint decision making, is now understood to have a significant affective component. I discuss in this essay the evolution of research exploring the role of affect in negotiation, consider the interplay of affect and cognition that underlies the papers in this issue, and comment on methodological developments and challenges in the study of negotiator affect. Attention to the role of affect is no longer a peripheral pursuit in negotiation research, but it does remain an elusive one.     

Social media's contribution to customer satisfaction with services

An important recent initiative in the effective transmission of healthcare services is the establishment of the patient-centered medicine (PCM) philosophy as a mechanism for enhancing customer satisfaction. Although the goals of PCM are important, there is less understanding of the means by which service providers can promote this philosophy.

This study examines the relationship between customers’ attitude toward and use of social media, PCM, and their satisfaction with healthcare services. Data were collected from a large, urban-based pediatric office in the northeast. The sample consisted of 234 respondents who were classified as ‘e-Patients’ – that is, they reported having access to the Internet and going online for health information. A three-stage regression analysis, conducted to establish the path coefficients for each stage in the model, shows that customers’ (patients’) attitude toward social media can be an effective method to enhance PCM and, ultimately, satisfaction. The findings contribute to theory in services by exploring the challenges of managing service delivery at the interface between customer satisfaction and the role and usefulness of adopting and effectively using social media.     

Internationalization Opportunities and Challenges for Small and Medium-Sized Enterprises from Developing Countries

The purpose of this study was to identify opportunities and challenges for internationalizing the small and medium-sized enterprises in developing countries. In this article the author examines the internationalization motives and strategies of the managers of these enterprises. A survey was conducted in Tanzania and the effect of the identified opportunities on the decision to internationalize was modeled using the multinomial logistic regression to determine the relationship between the respondent profile and the decision to be taken in the absence of the internationalization opportunities. The results have revealed the existing opportunities including export rehabilitation incentives, schemes as well as institutional supports granted from the governmental and nongovernmental organizations, development partners, and business associations. However, inadequate international business skills, unawareness of existing export promotion programs, poor access to finance, and imperfect foreign market information are the main challenges. Profit and growth goals and saturation of domestic markets are the key drives to internationalization, with indirect exporting being the main internationalization strategy. The author concludes by drawing attention to managerial and policy implications and future research directions.     

Relationship lending and SME financing in the continental European bank-based system

This paper analyzes the relationship between banks and SMEs in the continental European bank-based system. We find that SMEs with longer bank relationships have enhanced access to loans, but at the same time they bear a higher cost for their debt. We also find that firms maintaining two bank relationships get the cheapest debt, which establishes a limit for the degree of concentration of bank relationships. Our results also show that the existence of trust between firm and bank improves access to financing and reduces the borrowing costs, whereas it increases the likelihood that guarantees will have to be provided. As a consequence, it seems that a relationship based on trust is a better strategy to improve SMEs’ access to finance than the establishment of longer or more concentrated relationships.     

A martingale representation theorem and valuation of defaultable securities

We consider a financial framework with two levels of information: the public information generated by the financial assets, and a larger flow of information that contains additional knowledge about a random time. This random time can represent many economic and financial settings, such as the default time of a firm for credit risk, and the death time of an insured for life insurance. As the random time cannot be seen before its occurrence, the progressive enlargement of filtration seems tailor‐fit to model the larger flow of information that incorporates both the public flow and the information about the random time. In this context, our interest focuses on the following challenges: (a) How to single out the various risks coming from the financial assets, the random time, and their correlations? (b) How these risks interplay and lead to the formation of any risk in the larger flow of information? It is clear that understanding how risks build‐up and interact, when one enlarges the flow of information, is vital for an efficient risk management and derivatives' evaluation in those informational markets. Our answers to these challenges are full and complete no matter what the model for the random time is and no matter how the random time is related to the public flow. In fact, we introduce “pure default” risks, and quantify and classify these risks afterward. Then we elaborate our martingale representation results, which state that any martingale in the large filtration stopped at the random time can be decomposed into orthogonal local martingales (i.e., local martingales whose product remains a local martingale). This constitutes our first principal contribution, while our second contribution consists in evaluating various defaultable securities according to the recovery policy, within our financial setting that encompasses any default model, using a martingale “basis.” Our pricing formulas explain the impact of various recovery policies on securities and determine the types of pure default risk they entail.     

New waves of growth in the developed world

Following the Great Recession, many commentators are already forecasting a bleak economic future for developed economies over the next decade. Our research suggests, however, that there are ample opportunities for new growth and jobs in mature economies. Policymakers and business leaders can mine rich seams of growth through imaginative responses to oft‐perceived challenges around aging populations, the transition to a low‐carbon future, rising demands for public services, new information‐based services, and growing demands in the emerging world for social and physical infrastructure. However, such growth will fail to materialize unless action is taken today to secure the necessary supply‐side foundations for longer‐term growth. © 2011 Wiley Periodicals, Inc.     

Ethical Challenges in the Two Main Segments of the Insurance Industry: Key Considerations in the Evolving Financial Services Marketplace

Based on the findings of several research studies of professionals in both the property-liability insurance industry and the life insurance industry, the paper makes and supports several important points. First, ethical challenges in the insurance industry involve not only a series of ethical dilemmas frequently faced by those working in the business, but also a variety of factors that hinder those working in the industry as they seek to resolve the ethical dilemmas encountered in the course of their work. Both of these two components of ethical challenges must be understood by those in the financial services industry who will deal with insurance operations in the future. Second, whereas the life insurance business and the property-liability insurance business have traditionally been viewed as being quite different from one another and still are in terms of operations and regulation, the research findings show that they are no longer very different in terms of the key ethical challenges faced by those working in the two segments of the industry. The paper shows how during the past decade the ethical challenges in the property-liability insurance industry have become quite similar to those in the more troubled life insurance industry.     

中国广告创意发展的新趋势

随着市场经济的迅速发展,互联网等新媒体的兴起,我国消费者不断成熟。广告不再能完全依靠广告创意取胜,传统意义上的广告正在受到挑战。广告创意未来的发展也将面临更多的机遇与挑战。本文则认为,广告创意的娱乐化、互动化和整合化将引领广告走向另一个高峰。随之而来的是广告创意方式、产业关系和广告人才选择的新变化。     

Neue Finanztechnologien — Bankenmarkt in Bewegung

Digitalisation opens new channels for financial transactions. Crowdlending and Digital Advice offer additional opportunities for customers to manage their assets. In the banking market, “FinTechs” are the most notable example of what Schumpeter described as “creative destruction”. They could threaten the existence of established banks. Therefore the banks should use the FinTechs as a testing laboratory for customer behavior and testing ground for a more modern marketing policy. This environment gives rise to concerns that there may develop an unregulated area of shadow banks. But it should be considered that a level playing field has to be ensured and that innovative processes and products are not stalled. A potential advantage of Digital Advice is that consumers can have the possibility to access the relevant information they need to make their financial decisions. Consumers, in turn, are only able to benefit from this advantage if competition between financial service providers leads to a supply of clear and comprehensible information about financial products and an appropriate degree of data security. The rise of Big Data analyses in retail banking allows a more precise estimation of creditworthiness risk as well as a consumer’s willingness-to-pay, propensity to switch and responsiveness to marketing offers. This not only impacts on competition, it represents major challenges for policymakers, authorities and consumers alike.     

Systemic small-player market exclusion in an east African context

ABSTRACT

Producer–consumers in Kenya and Uganda face challenges in meeting their subsistence goals. They face a paradoxical inclusion and exclusion from the contemporary market system that the solutions proposed in the agriculture development, subsistence markets and BOP perspectives cannot address because of faults in the pervasive marketing ecosystem perspective. In this article, we go beyond the traditional discussion of producer–consumers’ market access, to include upstream as well as downstream challenges. We introduce the concept of integration gaps to markets as a counterpoint to typical measures of market access. We show the integration gap is a systematic neocolonialist exclusion of producer–consumers that international aid agencies exhorting greater market engagement may worsen. We offer suggestions for improvement from a marketing ecosystem perspective.     

Information System Development in a Global Environment

SUMMARY

In this article the basic components of an information system in a multinational context are reviewed. Based upon these components, three types of generic challenges in developing a multinational information system are suggested: (1) managing the planning and development of the system; (2) challenges of data collection; and (3) technological and legal challenges related to transborder data flows. Finally, a local approach to information system development is outlined as the response corporations must take to achieve and maintain global competitiveness.