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Evidence for tt¯ tt¯ production in the multilepton final state in proton–proton collisions at √s=13 TeV with the ATLAS detector

A search is presented for four-top-quark production using an integrated luminosity of 139 fb- 1 of proton–proton collision data at a centre-of-mass energy of 13TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from

Seasonal resource value and male size influence male aggressive interactions in the leaf footed cactus bug, Narnia femorata

In animal contests, resource value (the quality of a given resource) and resource holding potential (a male's absolute fighting ability) are two important factors determining the level of engagement and outcome of contests. Few studies have tested these factors simultaneously. Here, we investigated whether natural, seasonal differences in cactus phenology (fruit quality) influence interactions bet

Wood decay fungus Flavodon ambrosius (Basidiomycota: Polyporales) is widely farmed by two genera of ambrosia beetles

The ambrosia fungus Flavodon ambrosius is the primary nutritional mutualist of ambrosia beetles Ambrosiodmus and Ambrosiophilus in North America. F. ambrosius is the only known ambrosial basidiomycete, unique in its efficient lignocellulose degradation. F. ambrosius is associated with both native American beetle species and species introduced from Asia. It remains unknown whether F. ambrosius is s

Historical isolation facilitates species radiation by sexual selection : Insights from Chorthippus grasshoppers

Theoretical and empirical studies have shown that species radiations are facilitated when a trait under divergent natural selection is also involved in sexual selection. It is yet unclear how quick and effective radiations are where assortative mating is unrelated to the ecological environment and primarily results from sexual selection. We address this question using sympatric grasshopper species

Geophysical monitoring of initiated in-situ bioremediation of chlorinated solvent contamination

Contaminated ground is a severe problem which is present in many countries, and it is of great importance to find efficient solutions to deal with it. In Sweden, there is a trend in the industry to move towards alternate remediation methods and on that scope in-situ bioremediation has received a lot of attention. The main challenge with in-situ bioremediation is to verify that the treatment has th

Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger

The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising, and calibrating them to reconstruct transverse energy deposits, which are then used in further processing to identify event features. During the first long shutdown of the LHC from 2013 to 2014, the central components of the PreProcessor, th

Polarization and cross section of midrapidity J /ψ production in p+p collisions at s =510 GeV

The PHENIX experiment has measured the spin alignment for inclusive J/ψ→e+e- decays in proton-proton collisions at s=510 GeV at midrapidity. The angular distributions have been measured in three different polarization frames, and the three decay angular coefficients have been extracted in a full two-dimensional analysis. Previously, PHENIX saw large longitudinal net polarization at forward rapidit

Ammonia Oxidation over a Pt25Rh75(001) Model Catalyst Surface : An Operando Study

The ammonia oxidation reaction over a PtRh binary alloy has been studied with a surface science approach by operando techniques such as near-ambient pressure X-ray photoemission spectroscopy (NAP-XPS) and surface X-ray diffraction (SXRD) combined with mass spectrometry. The article will explore the surface evolution across five different oxygen to ammonia ratios in the millibar regime for two diff

An Ecology of Measures and Indicators: Bibliometrics in Resource Allocation

This chapter briefly reviews how bibliometric indicators are used for allocating resources in academia. How these measures can be understood in relation to different evaluation systems is discussed, and various types of applications - including individual level use - are outlined. Furthermore, attention is given to the effect of evaluation in terms of incentives and possible adverse effects. The i

Pregnancy in women diagnosed with hiv on antiretroviral therapy in ethiopia : A retrospective cohort study

Introduction: due to increasing coverage of antiretroviral therapy (ART), more women living with HIV have improved health condition which also increases their chances of getting pregnant. However, the knowledge about pregnancy among women receiving ART in resource-constrained settings, like Ethiopia, is limited. The aim was to assess factors associated with pregnancy among women living with HIV in

Towards returns management strategies in internet retailing

The digital transformation of the retailing industry in recent years has had a profound effect on consumers’ behaviour on a global scale. When shopping and browsing online, consumers are not able to “touch and feel”, which means that product returns are inevitable. The fashion industry has particularly suffered from high return rates, which fluctuate between 30% and 50%. The industry has been stru

Solen är en levande stjärna

Solen har lyst konstant på vår värld i fyra och en halv miljard år. Strålarna som värmer vår hud idag har känts av varenda person som någonsin levt. Solens strålar har rört vid dinosaurier, och hälsat på de första varelser som lämnade havens vatten för ett liv på land.Solen har varit vittne till allting som skett här på Jorden. Men den är ingen passiv iakttagare. Solen är vår planets kraftverk, deThe Sun has shone on our world for four and a half billion years. The light that warms our skin today has been felt by every person who has ever lived.It is our nearest star and our planet’s powerhouse, the source of the energy that drives our winds, our weather and all life.The passage of the Sun’s fiery disc across the sky — day by day, month by month — was the only way to keep track of time for

Geoelectrical monitoring of embankment dams for detection of anomalous seepage and internal erosion - experiences and work in progress in Sweden

The demand for better methods for condition control and monitoring of embankment dams will increase in a near future as a result of expected more extreme weather situations. Furthermore the availability demand on hydropower will increase as a result of switching from fossil fuels to wind and solar power, in some countries in combination with decommissioning of nuclear power. Temperature monitoring

Changing research on research evaluation : A critical literature review to revisit the agenda

The current range and volume of research evaluation-related literature is extensive and incorporates scholarly and policy/practice-related perspectives. This reflects academic and practical interest over many decades and trails the changing funding and reputational modalities for universities, namely increased selectivity applied to institutional research funding streams and the perceived importan

Automatic static charging of electric distribution vehicles using ERS technology

In order to electrify commercial distribution vehicles, an easy to use charging infrastructure with minimum driver interaction is needed, as managing time is essential to maximize profit for this type of vehicles. This paper proposes the use of a piece of a conductive Alternating Short-Segmented Electric Road System (ASSE) as an automatic charger for lightweight distribution vans. Since the ASSE i

Adult-onset diabetes in Middle Eastern immigrants to Sweden : Novel subgroups and diabetic complications—The All New Diabetes in Scania cohort diabetic complications and ethnicity

Background: Middle Eastern immigrants to Europe represent a high risk population for type 2 diabetes. We compared prevalence of novel subgroups and assessed risk of diabetic macro- and microvascular complications between diabetes patients of Middle Eastern and European origin. Methods: This study included newly diagnosed diabetes patients born in Sweden (N = 10641) or Iraq (N = 286), previously in

Perceptions of ambulance nurses on their knowledge and competence when assessing psychiatric mental illness

Aims and objectives: To obtain the current perception of the knowledge and competence of pre-hospital emergency specialist nurses (ambulance) in attending patients with psychiatric symptoms. Background: Psychiatric illnesses have increased throughout the population. Consequently, pre-hospital emergency services frequently attend individuals with suspected or known mental illnesses. Design: We empl

Brain white matter lesions are associated with reduced hypothalamic volume and cranial radiotherapy in childhood-onset craniopharyngioma

Context: White matter lesions (WML) are caused by obstruction of small cerebral vessels associated with stroke risk. Craniopharyngioma (CP) patients suffer from increased cerebrovascular mortality. Objective: To investigate the effect of reduced HT volume and cranial radiotherapy (CRT) on WML in childhood-onset CP patients. Design: A cross-sectional study of 41 patients (24 women) surgically treat

Prevalence, concomitant reactions, and factors associated with fragrance allergy in Thailand

Background: Fragrances are the most common cause of cosmetic contact allergy. Up-to-date information on contact allergy frequencies and relevance aids primary and secondary preventive measures. Objectives: To determine the prevalence, associated factors, and concomitant reactions in fragrance allergy among Thais. Methods: This retrospective study collected data from 2012 to 2019. The patient chara

Medeltidsstaden Lund - i skuggan av domkyrkan

Lund presenteras som en medeltidsstad, och visst har staden sitt ursprung i medeltiden, men periodbeteckningen är en eftermedeltida konstruktion och de bevarade spåren är färre än man kan förledas tro. I artikeln genomgås vad som finns kvar av från medeltiden – domkyrkan, Liberiet, Klosterkyrkan, ruinen av sockenkyrkorna Maria Minor och Drotten, Krognoshuset, Dekan- och Kanikresidenset, stadsvalleLund in Scania is perceived as a medieval town. It has its origin in the Middle Ages for sure, however the concept of such a period is a later invention and the preserved traces are fewer and more transformed than one might believe. The article presents what remains from the Middle Ages – the cathedral, the nearby library, the monastery of S:t Peter and Mary, the moved ruins of the parish church M