Heterogeneous systems comprising sets of inherent subsystems are challenging to integrate. In particular, testing for interoperability and conformance is a challenge. Furthermore, the complexities of such systems amplify traditional testing challenges.We explore (1) which techniques are frequently discussed in literature in context of heterogeneous system testing that practitioners use to test the

filmrecension

A new proof of the equivalence of the Taut String Algorithm and the one-dimensional Rudin–Osher–Fatemi model is presented. Based on duality and the projection theorem in Hilbert space, the proof is strictly elementary. Existence and uniqueness of solutions (in the continuous case) to both denoising models follow as by-products. The standard convergence properties of the denoised signal, as the reg

Software developing organizations strive to achieve flexibility to maintain a competitive advantage. There is no common understanding of what characterize flexibility for a software organization beyond the scope of the software product. Without a common understanding, it is difficult to evaluate the degrees of flexibility of software development approaches. The aim of this literature review is to

Periodic boundary conditions (PBC) are well suited to describe repetitive structures in space, yet flawed for isotropic setups in which it is commonly used. We present an approach based on exploiting the congruency of a unit cell which combines the periodic nature of PBC with isotropy of an alternating cell. By applying these isotropic periodic boundary conditions (IPBC) to the standard Ewald summ

We consider Hilbert spaces of analytic functions in the disk with a normalized reproducing kernel and such that the backward shift f(z)↦[Formula presented] is a contraction on the space. We present a model for this operator and use it to prove the surprising result that functions which extend continuously to the closure of the disk are dense in the space. This has several applications, for example

"Läsåret 1918 skall alltid stå som ett märkesår för Historiska museet. Det betecknar de historiska samlingarnas inflyttning i en egen institutionsbyggnad, det forna zoologiska museets. Byggnadens förändring, till vilken medel beviljats av riksdagen, tog sin början i slutet av år 1917, men på grund av mellankommande strejk och blockad avslutades byggnadsarbetet först i september 1918 eller samtidig

DevOps as a new way of thinking for software development and operations has received much attention in the industry, while it has not been thoroughly investigated in academia yet. The objective of this study is to characterize DevOps by exploring its central components in terms of principles, practices and their relations to the principles, challenges of DevOps adoption, and benefits reported in t

Filmrecension

filmrecension

Context: Software organizations working in a market-driven environment have to select requirements from a large pool to be prioritized and put into backlogs for the development organization. Objective: This paper proposes an approach based on study selection in systematic literature reviews and translates the concept to requirements engineering. The rational for doing so is that the selection proc

Context: DevOps, the combination of Development and Operations, is a new way of thinking in the software engineering domain that recently received much attention. Given that DevOps is a new term and novel concept recently introduced, no common understanding of what it entails has been achieved yet. Consequently, definitions of DevOps often only represent a part that is relevant to the concept. Obj

Background: Club cell secretory protein (CC16) probably has a role in protecting the lung from inflammation. Aim: To evaluate if low levels of CC16 in gastric fluid at birth, reflecting low levels of CC16 in the lung, would be associated with lung inflammation and respiratory morbidity. Methods: A study of 64 infants with mean gestational age 26.1 weeks. CC16 was analyzed in gastric fluid at birth

Ecological intensification provides opportunity to increase agricultural productivity while minimizing negative environmental impacts, by supporting ecosystem services such as crop pollination and biological pest control. For this we need to develop targeted management solutions that provide critical resources to service-providing organisms at the right time and place. We tested whether annual str

This article explores the financial dilemma from a household level perspective of paying for primary education in Tanzania. In 2001, the primary education fee was abolished in a serious attempt to achieve free universal primary education. By eliminating what was perceived as the main obstacle for reaching education for all, the enrollment rates were expected to increase. However, the schools thems

Lean blowout (LBO) is one of the major instability problems of premixed combustion. LBO equivalence ratio is a function of inlet temperature and pressure, mass flow or aerodynamic loading, and fuel composition. All these, except the last, vary during startup and with load. Developing gas turbine combustors capable of operating within wider range of fuel compositions requires extensive knowledge ab

A comparative experimental investigation has been performed, comparing the emissions from a synthetic jet fuel and from Jet AI. In the investigation, the unburned hydrocarbons were analyzed chemically and the regulated emissions of NOX, CO and HC were measured. All combustion tests were performed under elevated pressures in a gas turbine combustor rig. A Swedish company, Oroboros AB, has developed