The Zeta Function of a Hypergraph

We generalize the Ihara-Selberg zeta function to hypergraphs in a natural way. Hashimoto's factorization results for biregular bipartite graphs apply, leading to exact factorizations. For $(d,r)$-regular hypergraphs, we show that a modified Riemann hypothesis is true if and only if the hypergraph is Ramanujan in the sense of Winnie Li and Patrick Sol\'e. Finally, we give an example to show how the generalized zeta function can be applied to graphs to distinguish non-isomorphic graphs with the same Ihara-Selberg zeta function.Comment: 24 pages, 6 figure

A nesting aggregation of the solitary bee Megachile atrata (Hymenoptera: Megachilidae) in the Philippines

A nesting aggregation of Megachile (Creightonella) atrata Smith in the Philippines comprised almost 300 active nests.  The bees in rapid flight resemble the hornet Vespa tropica Linnaeus. The nest structure is similar to that reported for M. (C.) frontalis (Fabricius) in New Guinea

Feverish fictions: William T. Vollmann and American literary history after postmodernism

The rise of the New Sincerity in contemporary American fiction has largely been read on terms provided by a handful of early proponents. This article contends that more complex formulations of the notion are necessary if it is to remain useful as a descriptor for important qualities of recent texts. Among issues in need of greater attention are the implications of the New Sincerity for historical awareness, a topic I pursue via consideration of William T. Vollmann’s grappling with literary history. I argue that Vollmann’s works offer more than the pastiche that allegedly defined historical consciousness in postmodernist fiction. His intertextual engagements with Edgar Allan Poe are especially valuable for modelling some of the ways recent fictions bypass postmodernist ahistoricism in favor of connections to a usable past, and, especially, a usable literary tradition. Readings of Vollmann’s ‘The Grave of Lost Stories’ (in several editions) and ‘The Cemetery of the World’ show how he employs research in the textual archive as a figuration of relations to the past that can serve the ends of renewal and recovery.Accepted manuscrip

Independence in Europe: Secession, Sovereignty, and the European Union

The aim of this thesis is to explore the experiences of four cohorts of students from their first semester until one year after graduation, with the focus on how they perceive their opportunities to influence their study conditions transition to work. The study has a longitudinal design. Data collected from students in a MSc programme in engineering started in the first semester and continued yearly until one year after graduation and consisted of questionnaires and interviews. Results indicate that students’ perceptions of their opportunities to influence their study conditions is related to their self-efficacy and motivation; strategies they use and approaches to studying they adopt. Students adopt an adaptive approach, based on the perception that the programme is supposed to be demanding and that students should accept and adapt to the conditions of the programme; a critical approach, based on the perception that difficult conditions are negative because they make it hard to reflect on what is studied; or a cooperative approach, based on the perception that cooperation with peers is important. Quantitative results show that cohorts who studied project-based courses cooperate significantly more with peer students than cohorts who study in conventional courses. Students with most project based courses experienced workload and social support in different ways than other students. The final study on students’ transition to work show that students who study in many project-based courses are more prepared to work than students who study conventional courses. The overall findings indicate that it is important to integrate psychological, social and individual ways of interpreting the student experiences of their studies and transition to work.Syftet med avhandlingen är att utforska fyra studentkohorters erfarenheter frånderas första termin till ett år efter deras examen, med fokus på hur de uppleversina möjligheter att påverka sina studieförhållanden samt erfarenheter av att blianställningsbara. Avhandlingen baserar sig på en longitudinell studie.Datainsamlingen från studenter på Civilingenjörsprogrammet för Teknisk fysikoch elektroteknik påbörjades första terminen och pågick årligen till ett år efter attde tagit examen och bestod av frågeformulär och intervjuer. Resultaten visar attstudenternas upplevelser av sina möjligheter att påverka sina studieförhållanden ärrelaterade till deras självtillit (self-efficacy) och motivation; de strategier som deanvänder och de studieansatser som de antar. Studenter antar en adaptivstudieansats, baserad på uppfattningen att programmet ska vara krävande och attstudenter ska acceptera och anpassa sig till programmets förhållanden; en kritiskstudieansats, baseras på uppfattningen att svåra studieförhållanden är negativaeftersom de gör det svårt för studenten att reflektera över det som studeras; elleren kooperativ studieansats, baserad på uppfattningen att samarbete medstudiekamrater är viktigt. Kvantitativa resultat visar att årskullar som läserprojektbaserade kurser samarbetar mer med studiekamrater än årskullar som läserkonventionella kurser. Vidare upplevde studenter med flest projektbaserade kurserarbetsbelastningen och det sociala stödet på andra vis än övriga studenter. Densista studien om studenters övergång till arbetsliv visade att årskullar som läserprojektbaserade kurser känner sig mer redo att börja arbeta än årskullar som läserkonventionella kurser. De övergripande resultaten visar att det är viktigt attintegrera psykologiska, sociala och individuella sätt att tolka studenterserfarenheter av sina studier och övergång till arbetslivet