Review of Concepts,Tools and Indices for the Assessment of Urban Quality of Life

Social Indicators Research - The rapid urban growth poses a huge challenge in sustaining the quality of local environment and life characteristics in contemporary cities. There is a growing body of...     

Honeynet games: a game theoretic approach to defending network monitors

A honeynet is a portion of routed but otherwise unused address space that is instrumented for network traffic monitoring. It is an invaluable tool for understanding unwanted Internet traffic and malicious attacks. We formalize the problem of defending honeynets from systematic mapping (a serious threat to their viability) as a simple two-person game. The objective of the Attacker is to identify a honeynet with a minimum number of probes. The objective of the Defender is to maintain a honeynet for as long as possible before moving it to a new location within a larger address space. Using this game theoretic framework, we describe and prove optimal or near-optimal strategies for both the Attacker and the Defender. This is the first mathematically rigorous study of this increasingly important problem on honeynet defense. Our theoretical ideas provide the first formalism of the honeynet monitoring problem, illustrate the viability of network address shuffling, and inform the design of next generation honeynet defense systems.     

Sex Differentials in Childhood Feeding,Health Care,and Nutritional Status in India

Strong preference for sons in South Asia is well documented, but evidence on female disadvantage in childhood feeding, health care, and nutritional status is inconclusive. This article examines sex differentials in indicators of childhood feeding, health care, and nutritional status of children under age 3 by birth order and sex composition of older living siblings. Data are from India's 1992–93 and 1998–99 National Family Health Surveys. The analysis finds three reasons for inconclusive evidence on female disadvantage in aggregate analyses. First, discrimination against girls is limited to the relatively small fraction of children of certain birth orders and sex compositions of older siblings. Second, discrimination against girls when boys are in short supply and discrimination against boys when girls are in short supply cancel each other to some extent. Third, some discrimination against girls (e.g., in exclusive breastfeeding at 6–9 months) is nutritionally beneficial to girls. Separate analyses for North and South India find that gender discrimination is as common in the South as in the North, where son preference is generally much stronger.     

Roles of Transparency and Trust in the Relationship between Privatization and Customers’ Satisfaction in Ethiopia: Results of Structural Equation Modelling

As a part of public sector reform, privatization has been actively experienced since three decades across the globe. This study examines the relationship between privatization of public organizations and customers’ satisfaction in Ethiopia with the mediating role of transparency and trust. The structural equation modelling was applied to 315 samples taken from privatized services and manufacturing sectors. The results established that transparency alone fails to be a mediator, but trust plays the role of a partial mediator into the relationship between privatization and customers satisfaction. Combined together, the model results into a partial mediation of both transparency and trust.

     

Equivariance of ridge estimators through standardization,a note

We show that standardization of data recommended for Ridge Regression (RR) by Hoerl and Kennard (1970 a8b), Marquardt and Snee (1975), and others is worthwhile despite the criticisms by Swamy, Mehta and Rappoport (SMR) (1978).     

Task Design,Team Context,and Psychological Safety: An Empirical Analysis of R&D Projects in High Technology Organizations

High technology organizations need to develop new products or processes that address the dual goals of exploration and exploitation. The competing viewpoints and the asymmetric nature of market returns associated with these goals in R&D projects can heighten stress levels among project team members and reduce their psychological safety. While current research calls for greater focus on task design for improving psychological safety, we know little about how team contextual factors affect this relationship. This study develops and tests a conceptual framework that examines the moderating role of R&D team contextual factors, namely, relative exploration and project‐organization metric alignment on the relationship between a key task design variable, namely, team autonomy, and psychological safety. Relative exploration captures the extent to which exploration goals are emphasized over exploitation goals in an R&D project, while project‐organization metric alignment measures the extent to which project metrics are aligned with broader organizational metrics. Furthermore, we examine the performance consequences of psychological safety in R&D projects. The empirical analysis is conducted using primary data collected from multiple informants across 110 R&D projects in 34 high technology business units. Our results indicate that relative exploration and project‐organization metric alignment have contrasting moderating effects. Furthermore, the effect of psychological safety on project performance is found to be indirect and mediated through team turnover. Implications of the study findings, limitations, and directions for future research are discussed.