In entry-exit gas markets as they are currently implemented in Europe, network constraints do not affect market interaction beyond the technical capacities determined by the TSO that restrict the quantities individual firms can trade at the market. It is an up to now unanswered question to what extent existing network capacity remains unused in an entry-exit design and to what extent feasible a...

The framework we describe in this paper is composed of two parts. The first part provides a typology of deviations and inconsistencies which occur during human-centered systems development and use. This typology, based on four facets and three levels of abstraction (conceptual, detailed, technical), permits identifying other types of deviations and inconsistencies not considered in the literatu...

PC stands for path-conjunctive, the name of a class of queries and dependencies that we define over complex values with dictionaries. This class includes the relational conjunctive queries and embedded dependencies, as well as many interesting examples of complex value and oodb queries and integrity constraints. We show that some important classical results on containment, dependency implicatio...

Introduction This paper looks at the possible evolutionary paths that the current printed scholarly monograph may take, paying particular attention to the ways in which technical, economic, and cultural factors may shape this evolution. It does not predict the demise of today's printed scholarly monograph, but suggests that it will coexist with a series of successors that will offer new points ...

A Socio-Technical System (STS) is an interplay of humans, organizations and technical systems. STSs consist of interacting actors, which depend on one another to achieve their objectives. In previous work, we have proposed STS-ml, a security requirements modelling language (using i*-like primitives such as actor, goal, delegation) for the design of secure STSs. STS-ml represents security requir...

Generating technical exercises for various levels of playing ability is important for any instrument method book. Writing exercises by hand can be quite tedious, and severely limits the number of exercises which could be created. This is particularly apparent when we consider computer music tutoring systems, which could benefit from a library of thousands of exercises. This library could be use...

We construct a simple authentication protocol whose security is based solely on the problem of Learning Parity with Noise (LPN) that is secure against Man-in-the-Middle attacks. Our protocol is suitable for RFID devices, whose limited circuit size and power constraints rule out the use of more heavyweight operations such as modular exponentiation. The protocol is extremely simple: both parties ...

a r t i c l e i n f o Construction planning is a fundamental and challenging process in the management and execution of construction projects. The task of developing technical plans is critical to ensuring the success of a construction project. This task of preparing a technical plan is usually undertaken manually using two separate processes: (1) plan definition and (2) verification/checking. ...

The ascending trend of photo-voltaic (PV) utilization on a domestic scale in Finland, calls for a technical aspects review of low voltage (LV) networks. This work investigates the technical factors that limit the PV hosting capacity, in realistic case networks, designed relative to different geographical areas of Finland. A Monte Carlo method based analysis was performed, in order to quantify t...

Currency trading is a vast and highly profitable business. This review examines the profitability of two popular currency trading strategies in light of currency-market microstructure research. The carry-trade strategy involves borrowing a low-interest currency and investing the proceeds in a high-interest currency. Technical trading strategies are determined exclusively on the basis of past as...