A Simplified Hierarchical Dynamic Quantum Secret Sharing Protocol with Added Features

Generalizing the notion of dynamic quantum secret sharing (DQSS), a simplified protocol for hierarchical dynamic quantum secret sharing (HDQSS) is proposed and it is shown that the protocol can be implemented using any existing protocol of quantum key distribution, quantum key agreement or secure direct quantum communication. The security of this proposed protocol against eavesdropping and collusion attacks is discussed with specific attention towards the issues related to the composability of the subprotocols that constitute the proposed protocol. The security and qubit efficiency of the proposed protocol is also compared with that of other existing protocols of DQSS. Further, it is shown that it is possible to design a semi-quantum protocol of HDQSS and in principle, the protocols of HDQSS can be implemented using any quantum state. It is also noted that the completely orthogonal-state-based realization of HDQSS protocol is possible and that HDQSS can be experimentally realized using a large number of alternative approaches.Comment: 9 pages, 1 figur

Marketing Cooperatives and Financial Structure

The relationship between the financial structure of a marketing cooperative (MC) and the requirement of the domination of control by the members is analysed from a transaction costs perspective. A MC receives less favorable terms on outside equity than a conventional firm because the decision power regarding new investments is not allocated to the providers of these funds. This is a serious threat to the survival of a MC in a market where efficient investments are characterized by an increasing level of asset specificity at the processing stage of production. A MC is predicted to be an efficient organizational form when the level of asset specificity at the processing stage of production is at a low or immediate level compared to the level of asset specificity at the farming stage of production.finance;transaction costs economics;marketing cooperative

Internal Promotion Competitions in Firms

[Excerpt] Using a sample of skilled workers from a cross section of establishments in four metropolitan areas of the United States, I present evidence suggesting that promotions are determined by relative worker performance. I then estimate a structural model of promotion tournaments (treating as endogenous promotions, worker performance, and the wage spread from promotion) that simultaneously accounts for worker and firm behavior and how the interaction of these behaviors gives rise to promotions. The results are consistent with the predictions of tournament theory that employers set wage spreads to induce optimal performance levels, and that workers are motivated by larger spreads

Analysis and control of complex collaborative design systems

This paper presents a novel method for modelling the complexity of collaborative design systems based on its analysis and proposes a solution to reducing complexity and improving performance of such systems. The interaction and interfacing properties among many components of a complex design system are analysed from different viewpoints and then a complexity model for collaborative design is established accordingly. In order to simplify complexity and improve performance of collaborative design, a general solution of decomposing a whole system into sub-systems and using unified interface mechanism between them has been proposed. This proposed solution has been tested with a case study. It has been shown that the proposed solution is meaningful and practical

Policy entrepreneurship in UK central government: The behavioural insights team and the use of randomized controlled trials

What factors explain the success of the UK Cabinet Office’s Behavioural Insights Team? To answer this question, this article applies insights from organizational theory, particularly accounts of change agents. Change agents are able—with senior sponsorship—to foster innovation by determination and skill: they win allies and circumvent more traditional bureaucratic procedures. Although Behavioural Insights Team is a change agent—maybe even a skunkworks unit—not all the facilitating factors identified in the literature apply in this central government context. Key factors are its willingness to work in a non-hierarchical way, skills at forming alliances, and the ability to form good relationships with expert audiences. It has been able to promote a more entrepreneurial approach to government by using randomized controlled trials as a robust method of policy evaluation

Hierarchical Structure in Brazilian Industrial Firms: an Econometric Study

The paper investigates different implications of theoretical models for hierarchical structure. A sample of 6567 firms in the Brazilian manufacturing industry is considered and explanatory factors pertaining structural characteristics, network technology, technological innovations, managerial innovations and incentive mechanisms are investigated. Despite the broader availability of explanatory variables in some categories, one only detects important joint effects accruing from the group of network technology variables as had been previously obtained in the related literature. In contrast, however, one can detect a marginally significant joint effect of the newly considered group of incentive mechanisms variables. The evidence in terms of individual effects is largely consistent with the predicted effects from the theoretical literature on hierarchy.

Personnel Economics: The Economist's View of Human Resources

Personnel economics drills deeply into the firm to study human resource management practices like compensation, hiring practices, training, and teamwork. Many questions are asked. Why should pay vary across workers within firms--and how "compressed" should pay be within firms? Should firms pay workers for their performance on the job or for their skills or hours of work? How are pay and promotions structured across jobs to induce optimal effort from employees? Why do firms use teams and how are teams used most effectively? How should all these human resource management practices, from incentive pay to teamwork, be combined within firms? Personnel economics offers new tools and new answers to these questions. In this paper, we display the tools and principles of personnel economics through a series of models aimed at addressing the questions posed above. We focus on the building blocks that form the foundation of personnel economics: the assumptions that both the worker and the firm are rational maximizing agents; that labor markets and product markets must reach some price-quantity equilibrium; that markets are efficient or that market failures have introduced inefficiencies; and that the use of econometrics and experimental techniques has advanced our ability to identify underlying causal relationships.

Functional organization of human sensorimotor cortex for speech articulation.

Speaking is one of the most complex actions that we perform, but nearly all of us learn to do it effortlessly. Production of fluent speech requires the precise, coordinated movement of multiple articulators (for example, the lips, jaw, tongue and larynx) over rapid time scales. Here we used high-resolution, multi-electrode cortical recordings during the production of consonant-vowel syllables to determine the organization of speech sensorimotor cortex in humans. We found speech-articulator representations that are arranged somatotopically on ventral pre- and post-central gyri, and that partially overlap at individual electrodes. These representations were coordinated temporally as sequences during syllable production. Spatial patterns of cortical activity showed an emergent, population-level representation, which was organized by phonetic features. Over tens of milliseconds, the spatial patterns transitioned between distinct representations for different consonants and vowels. These results reveal the dynamic organization of speech sensorimotor cortex during the generation of multi-articulator movements that underlies our ability to speak

The Industrial Ontologies Foundry proof-of-concept project

The current industrial revolution is said to be driven by the digitization that exploits connected information across all aspects of manufacturing. Standards have been recognized as an important enabler. Ontology-based information standard may provide benefits not offered by current information standards. Although there have been ontologies developed in the industrial manufacturing domain, they have been fragmented and inconsistent, and little has received a standard status. With successes in developing coherent ontologies in the biological, biomedical, and financial domains, an effort called Industrial Ontologies Foundry (IOF) has been formed to pursue the same goal for the industrial manufacturing domain. However, developing a coherent ontology covering the entire industrial manufacturing domain has been known to be a mountainous challenge because of the multidisciplinary nature of manufacturing. To manage the scope and expectations, the IOF community kicked-off its effort with a proof-of-concept (POC) project. This paper describes the developments within the project. It also provides a brief update on the IOF organizational set up