A comprehensive dynamic control oriented model of a polymer electrolyte fuel cell (PEFC) is developed, considering the mixed effects of temperature, gas flow and capacitance. The fractional relationship between the dynamic output voltage and the capacitance, which escaped the attention in most previous studies is also addressed. Moreover, based on the developed PEFC model, a proportional integral

Protapion trifolii and P. fulvipes (Coleoptera: Brentidae) are major pests in European clover seed production. Previous studies have reported a high host plant fidelity of these weevils for red and white clover species, respectively, driven by host plant olfactory cues. Given the specific host preferences observed in these weevils, we aimed to elucidate to which extent such selectivity is reflecte

Central nervous system (CNS) involvement by cytospin is associated with increased risk of relapse in childhood acute lymphoblastic leukemia. We investigated if flow cytometric analysis of cerebrospinal fluid (CSF) at diagnosis improves the prediction of relapse. This prospective cohort study included patients (1.0–17.9 years) treated according to the Nordic Society of Pediatric Hematology and Onco

The data collected in this article is based on a performance test of a polymer electrolyte fuel cell (PEFC). The behavior the different parameters of a PEFC is analyzed considering different aspects relative to the inlet gases temperatures. The fuel cell was evaluated by means of a current sweep at different percentages of relative humidity between the feed gas and the cell. The relative humidity

I det fjärde numret av Essä uppmärksammas ett helt vanligt grässtrå – fårsvingeln – genom Olof Rudbeck den äldres avbildning av det i det stora botaniska verket Campus Elysii som under dramatiska omständigheter nästan brann upp i stadsbranden i Uppsala 1702. De som tittat på gräset och skrivit om det är Erik Bergqvist, Gunnar Eriksson, Honor C. Prentice, Birgitta Lillpers, Carin Franzén och Jakob

With decreasing heat demand and less availability of high-temperature heat supply in future energy systems, the current district heating systems may experience increased competition on the heat market. A viable option to mitigate increasing competition is to operate systems with lower temperature levels, and the most conceivable way to achieve lower temperature levels is to decrease return tempera

Domestic revenue mobilization continues to feature on the agendas of international development agents and academic communities. There is, however, a strong focus on comparing the developed and developing countries with the aim of finding transferable lessons to the latter. Thus, most comparative studies default to comparing tax performances of developing countries with OECD averages. Interregional

Internet-of-things (IoT) systems consist of spatially distributed devices with services. Compared to desktop applications, IoT systems are always running and need to deal with unresponsive devices and weak connectivity. In this thesis, we examine the following question: How can we simplify the development of IoT systems? We begin to answer this question by proposing a domain-specific language (DSL

Recent work on wealthy populations has called into question long-standing conclusions about the importance of birth spacing for infant health. Using data from 77 countries, Joseph Molitoris and colleagues show that spacing births beyond 24 months can greatly reduce infant mortality risks, but that the benefits of birth spacing decline with socioeconomic and demographic development.

Ce chapitre constitue une première approche du phénomène de crédit interentreprises entre les brasseurs et les bars et restaurants en Suède. Trois questions sont posées : 1. Pourquoi, en Suède, les brasseurs accordent-ils des prêts aux bars et restaurants ? 2. Quelle forme prennent ces prêts ? 3. Quels sont les effets de ces pratiques ? La question no 2 sur la forme de ces prêts porte essentiellem

Currency unions have been a recurring phenomenon in monetary history. The most basic definition of a currency union is when two or more sovereign nations share a common currency. Even though a currency union shares many characteristics with international monetary regimes based on fixed exchange rates (such as the Bretton Wood system), it is the most extreme case of a fixed exchange rate as it also

BACKGROUND: To measure changes in four common chemotherapy related side-effects (low energy, stress, nausea and pain) immediately after a single exercise session within the first week after treatment.METHODS: Thirty-eight patients with chemotherapy-treated breast cancer, participating in a multi-centre randomised controlled study, the Physical Training and Cancer study (Phys-Can) were included in

An extended version of a numerical model introduced by Larson et al. (2013) to simulate long-term cross shore material exchange for the subaqueous portion of the profile has been developed. Efforts have focused on improving the model to better account for beach systems consisting of two bars (inner and outer bar), as well as simulating the feeder response over time of nearshore dredged material ba