Joint optimization of rule placement and traffic engineering for QoS provisioning in software defined network

Software-Defined Network (SDN) is a promising network paradigm that separates the control plane and data plane in the network. It has shown great advantages in simplifying network management such that new functions can be easily supported without physical access to the network switches. However, Ternary Content Addressable Memory (TCAM), as a critical hardware storing rules for high-speed packet processing in SDN-enabled devices, can be supplied to each device with very limited quantity because it is expensive and energy-consuming. To efficiently use TCAM resources, we propose a rule multiplexing scheme, in which the same set of rules deployed on each node apply to the whole flow of a session going through but towards different paths. Based on this scheme, we study the rule placement problem with the objective of minimizing rule space occupation for multiple unicast sessions under QoS constraints. We formulate the optimization problem jointly considering routing engineering and rule placement under both existing and our rule multiplexing schemes. Via an extensive review of the state-of-the-art work, to the best of our knowledge, we are the first to study the non-routing-rule placement problem. Finally, extensive simulations are conducted to show that our proposals significantly outperform existing solutions.

Terrify and control: the politics of risk society

The article presents information on the idea of risk management. The origins of the contemporary constructions of risk are found in the seventeenth century, with the development of maritime insurance. In the context of maritime trading, risk came to be seen in terms of the balance between acquisitive opportunities and potential dangers and calculations of future loss of a ship or cargo. Today perceptions of risk affect our actions and strategies in areas of our life as diverse as health, parenting, crime prevention, recreation and travel. Public policy tends to be focused around risk avoidance and risk management, particularly in areas of child protection and aged care. While most of the discussions of risk have focused on risks as bads in society, risk has also been identified as a good. Risk is deemed a good when it challenges people to think differently and creatively. From a neo-liberal perspective risk opens up opportunities for unleashing of entrepreneurial capacity. In the context of the modernist commitment to the idea that people have the potential to control their own destiny, identification of threats and dangers can energize people to be adventurous. The discourse of risk has framed all the reports of the outbreaks of new strains of infection and includes instructions on how to recognize the risk assessments of its spread and instructions on how to avoid its spread.

The separation of ownership and control under a happiness-based theory of the corporation

Explores the happiness-based theory of the corporation, suggesting that there is no conflict between the pursuance of economic and social objectives on the basis that their interplay is required to facilitate shareholder happiness. Considers: (1) the Berle-Means hypothesis and the separation of ownership and control, the dominant governance structure for large companies; (2) a happiness-based perspective on the separation; and (3) law reform applicable to a happiness-based theory. Argues that the separation of ownership and control is not in shareholders' best interests because the structure is not conducive to the happiness of individual shareholders and should be reformed.

Interpersonal trust and control behaviour of Chinese managers

Interpersonal trust is believed to influence the management and control of organisations in China. China's importance as a host country for foreign direct investments (FDIs) through multinational company subsidiaries (MNCs) and international joint ventures (IJVs) is growing rapidly. MNCs and INs located in China often employ local Chinese managers to control their subsidiaries or ventures. This makes it essential for designers of management control systems to have an understanding of the interpersonal trust-sensitive control behaviour of Chinese managers. One of the important aspects of control behaviour is how managers control their subordinates.

This paper examines the relationship between Chinese managers' trust in subordinates and their (Chinese managers') control behaviour towards the subordinates. On the basis of a questionnaire survey of a cohort of managers from Beijing, the study explores the effects of trust on the use of social controls, formal controls, and monitoring.

The findings of this study indicate that a manager's high (low) trust in a subordinate is associated with a low (high) level of monitoring, a high (high) level of social control and a high (low) level of perceived performance. The hypothesis that a superior's high (low) level of trust is associated with a low (high) level of reliance on formal controls was not supported. These findings, while indicative of control behaviour of Chinese managers in particular, also add to the growing academic literature on trust and control in general. In a practical sense, an
understanding of the trust-sensitive control behaviour of Chinese managers is particularly useful in designing and implementing effective control systems for international organisations operating in China.

Families divided : culture and control in small family business

In this article, we explore the dynamics of control, compliance and resistance using two case studies where ‘family’ has symbolic, material and ideological significance. While the ‘family’ metaphor is often invoked to suggest a normative unity and integration in large organizations, we investigate the use of shared understandings of divisions (Parker 1995) and difference, as well as unity and similarity, in constituting organizational culture in two small family-owned firms. Diverging from mainstream family business research, we adopt a critical and interpretative approach that incorporates employee perspectives and explores how forms of control and resistance need to be understood in relation to their local contexts. We also argue that organization studies could benefit from revisiting progressive assumptions that equate developments in forms of organization with forms of organizational control.

Analysis and control in children with SLI

Purpose: E. Bialystok and E. B. Ryan (1985) have outlined two operations, analysis and control, which are required for grammaticality judgments. In this model, analysis is involved in determining the grammaticality of a sentence, and control is required so that irrelevant information is ignored. This study examined these processes in specific language impairment (SLI).

Method: Sixteen children with SLI and 20 typically developing (TD) children between 8;6 (years;months) and 10;6 were presented with a grammatical judgment task. Analysis was measured by recording children's decision times in determining grammaticality. Control was assessed by examining accuracy for judgments made for semantically odd sentences.

Results: Relative to the TD group, it was found that the children with SLI took longer in judging sentences associated with the process of analysis. Children with SLI were also found to have more difficulty, in terms of accuracy, with items requiring control (e.g., semantically odd sentences) than did the TD group.

Conclusion: It is argued that the longer time required for children with SLI to respond to semantically normal sentences reflects a degree of difficulty with completing analysis. The SLI group's lower level of accuracy on semantically odd sentences reflects a problem with a control and is consistent with previously reported problems with cognitive inhibition in SLI

On-line tool condition monitoring and control system in forging processes

Cold bulk metal forming has made large-scale production of small complex solid parts economically feasible. Tooling used in metal forming poses many uncertainties in the preliminary cost estimation and production process and continual tool replacement and maintenance dramatically reduces productivity and raises manufacturing cost. In order to tackle this, an on-line tool condition monitoring system using artificial neural network (ANN) to integrate information from multiple sensors for forging process has been developed. Together with the force, acoustic emission signals and process conditions, information developed from theoretical models is integrated into the ANN tool monitoring system to predict tool life and provide the maintenance schedule.

Assessment of 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D3 concentrations in male and female multiple sclerosis patients and control volunteers

Populations with insufficient ultraviolet exposure and who consume diets low in vitamin D have low vitamin D status (plasma 25-hydroxyvitamin D (25(OH)D) concentrations) and a reported higher incidence of multiple sclerosis (MS). The active form of vitamin D, 1,25-dihydroxyvitamin D₃ (1,25(OH)₂D₃), is an effective anti-inflammatory molecule. No research to date has assessed 1,25(OH)₂D₃ concentrations in individuals with MS. In this study, plasma concentrations of 25(OH)D, 1,25(OH)₂D ₃ and parathyroid hormone (PTH) were measured in 29 individuals with MS and 22 age- and sex-matched control volunteers. There were no significant differences in plasma PTH, 25(OH)D and 1,25(OH)₂D₃ concentrations between individuals with MS and control volunteers. Women with MS had significantly higher 25(OH)D and 1,25(OH)₂D₃ concentrations than men with MS (79.1 ±45.4 versus 50.2±15.3 nmol/L, P=0.019 and 103.8± 36.8 versus 70.4±28.7 pmol/L, P=0.019, respectively). There was a significant positive correlation between 25(OH)D and 1,25(OH)₂D ₃ concentrations in all subjects (r=0.564, P=0.000), but secondary analysis revealed that the correlation was driven by women with MS (r=0.677, P= 0.001). Significant sex differences in vitamin D metabolism were observed and were most marked in individuals with MS, suggesting that vitamin D requirements may differ between the sexes, as well as by underlying disease state.

Prevalence, awareness, treatment, and control of hypertension in China data from the China National Nutrition and Health Survey 2002

Background— The present article aims to provide accurate estimates of the prevalence, awareness, treatment, and control of hypertension in adults in China.

Methods and Results— Data were obtained from sphygmomanometer measurements and an administered questionnaire from 141 892 Chinese adults 18 years of age who participated in the 2002 China National Nutrition and Health Survey. In 2002, 153 million Chinese adults were hypertensive. The prevalence was higher among men than women (20% versus 17%; P<0.001) and was higher in successive age groups. Overall, the prevalence of hypertension was higher in urban compared with rural areas in men (23% versus 18%; P<0.01) and women (18% versus 16%; P<0.001). Of the 24% affected individuals who were aware of their condition, 78% were treated and 19% were adequately controlled. Despite evidence to suggest improved levels of treatment in individuals with hypertension over the past decade, compared with estimates from 1991, the ratio of controlled to treated hypertension has remained largely unchanged at 1:4.

Conclusions— One in 6 Chinese adults is hypertensive, but only one quarter are aware of their condition. Despite increased rates of blood pressure–lowering treatment, few have their hypertension effectively controlled. National hypertension programs must focus on improving awareness in the wider community, as well as treatment and control, to prevent many tens of thousands of cardiovascular-related deaths.

Meteorological influences on coastal sea levels west of Port Phillip and their engineering significance

This report presents the results of an analysis of three years of tide and meteorological data aimed at delineating the influences of atmospheric pressure, waves, onshore winds and longshore winds on coastal sea levels West of Port Phillip Bay, Victoria« The data was used to develop predictive and hindcasting techniques for meteorological tides on the Otway Coast, using statistical methods, an empirical method and a mathematical model. The nature and magnitude of contributions of the various components of the meteorological tide, and the general variability of monthly and seasonal variations were also studied. It was found that meteorological tides on the Otway Coast can account for significant sea level changes, with the main factors being wind and atmospheric pressure. The wind component of the meteorological tide was found to be approximately twice the pressure component, and longshore winds were found to be more significant than onshore winds for wind setup on the Otway Coast. The meteorological tide models developed enable estimates of wind setup and atmospheric pressure setup on the Otway Coast to be readily computed using data from synoptic charts. The wave setup component could not be separated from the meteorological tide and is included in the wind setup component. The results of the investigation are relevant to the design and maintenance of coastal engineering works, and point to the need for the establishment and operation of coastal management schemes on the Otway Coast.

Issues of power and control within women's experience of breastfeeding following childbirth

In this interpretive study, six women who have had some difficulty with breastfeeding, tell of their experiences of breastfeeding following childbirth. These stories are discussed using the feminist poststructuralist theory of discourse analysis, as presented by Weedon (1987). The women's stories reveal a wide range of experiences, and conflicting discourses, many of which relate to issues of power and control surrounding breastfeeding.