43 research outputs found
Interaction Between Visual and Phonotactic Orientation During Flight in \u3ci\u3eMagicicada Cassini\u3c/i\u3e (Homoptera: Cicadidae)
Visual and phonotactic orientation often occur simultaneously in diurnal cicadas. and these animals generally have their largest sensory elaboration in eyes and hearing organs. Phonotactic orientation occurs principally during flight. Males and females of Magicicada cassini commonly perform low- altitude « 5 m) and short-distance « 15 m) flights in their natural habitat at flight speeds of 3 to 6 m/s. During flight, the long body axis is tilted 10° to Q , head upward. Wing beat frequencies of tethered animals at 24° to 26°C averaged 28.8 Hz. Body temperature in the field for flying individuals aver- aged 4.6°C above ambient.
Compound eyes of females possess about 7% more facets than males, and the binocular field of view for both is especially expanded dorsa-frontally, frontally, and fronto-ventrally. The role of vision for phonoresponses, and in flight and landing behavior. was studied in nature by comparing controls with cicadas with eyes partly to completely covered with aluminum paint. Cicadas with their three ocelli covered behaved like controls and exhibited low-altitude and short-distance flights with landings on neighboring shrubs, as did cicadas with only both caudal halves or both dorsal halves of the compound eyes covered. Those with both compound eyes covered completely (with or without additionally covering the three ocelli) flew to higher altitudes and for longer distances. Higher and longer flight courses were also seen in cicadas (A) with only one compound eye covered. which in addition circled during walking and flight toward the side of unrestricted vision, (B) with both frontal or both ventral halves of their compound eyes covered. and (C) with either the binocular or monocular fields of the eyes covered. Thus, the paired fronta-antero-ventral regions of the compound eyes provide visual information for habitat-dependent low-altitude flights and landings.
Females with intact compound eyes and ocelli responded to playbacks of just the frequency/intensity sweep at the end of the buzz in calling songs of a male by flying within 1.2 m above the ground and landing on a nylon screen- covered small bush directly above the loudspeaker from distances of 2 to 8 m. mostly from lower vegetation. Males that were blinded, or blinded and deafened, sang less and flew less than normal males. However. they performed all of those behaviors, and all also walked and fed.
Periodical cicadas (Magicicada, Tibicininae) are known for synchronized adult emergence and noisy aggregations of millions of individuals of three intermingled species in each brood population (Alexander and Moore 1962). Broods are isolated geographically and chronologically, such that in some years no periodical cicada adults emerge, and most areas of the eastern United States have only one brood population appearing as adults at intervals of either 13 or 17 years. In all Magicicada species, daily flights affect spacing and aggregation of both sexes during feeding, chorusing, mating, and ovipositing. Flights are mediated by both acoustical and visual cues. Each species in these aggregations establishes mating leks. These aggregations continue to mix, every day and unpredictably, during the emergence period. Toward the end of the reproductive season, males die sooner than females, leading to little or no chorusing, and then females disperse progressively further from the lek sites. The cohesive effect of the acoustical cues of chorusing males on these cicada populations is obvious.
Both sexes of all six species of periodical cicadas live and feed on shrubs and trees of different species, sizes, and shapes, and females lay eggs in their living twigs. Their niches overlap almost completely, the three species of 13 year or 17-year cicadas being separated principally by diurnal acoustic behavior leading to aggregation sites that change every day and are seldom exclusive to a single Magicicada species. Adults frequently change location in these complex visual environments by short-distance and low-altitude flights. which we call bush-hopping. These flights are associated with sound communication and reproductive activities and are most commonly observed during bright sunlight and at ambient temperatures above 25°C with little wind (Alexander and Moore 1958,1962; Dunning et al. 1979). Otte (1990) and Toms (1992) discuss the common correlation between hearing and flying in orthopteroid insects, interactions basically similar to those found in cicadas. The present paper describes the interaction of vision (compound eyes and ocelli) and phonoresponses of males and females of Magicicada cassini (Fisher) in walking, but especially in flight and landing behavior, within a natural habitat
Longitudinal Experience-Wide Association Studies (LEWAS):A framework for studying personality change
Longitudinal Experience-Wide Association Studies-A Framework for Studying Personality Change
The importance of personality for predicting life outcomes in the domains of love, work, and health is well established, as is evidence that personality traits, while relatively stable, can change. However, little is known about the sources and processes that drive changes in personality traits and how such changes might impact important life outcomes. In this paper, we make the case that the research paradigms and methodological approaches commonly used in personality psychology need to be revised to advance our understanding of the sources and processes of personality change. We proposeLongitudinal Experience-Wide Association Studiesas a framework for studying personality change that can address the limitations of current methods, and we discuss strategies for overcoming some of the challenges associated withLongitudinal Experience-Wide Association Studies.Peer reviewe
Why stop at two opinions? Reply to McCrae (2020)
McCrae (2020) argues that it is premature to explore interventions focused on personality change. In his commentary, he suggests that interventions should be promoted only if their effects in self-report data are confirmed by the additional opinion of informants. We agree with the essence of his position and would go further by envisioning a new framework for rigorous collaborative research on personality change (Bleidorn et al., 2020). We nevertheless maintain that policymakers would benefit from considering the additional opinion of personality scientists. (PsycInfo Database Record (c) 2020 APA, all rights reserved)
A study of CP violation in B-+/- -> DK +/- and B-+/- -> D pi(+/-) decays with D -> (KSK +/-)-K-0 pi(-/+) final states
A first study of CP violation in the decay modes and , where labels a or meson and labels a or meson, is performed. The analysis uses the LHCb data set collected in collisions, corresponding to an integrated luminosity of 3 fb. The analysis is sensitive to the CP-violating CKM phase through seven observables: one charge asymmetry in each of the four modes and three ratios of the charge-integrated yields. The results are consistent with measurements of using other decay modes
Measurement of Upsilon production in collisions at root s=2.76 TeV
The production of , and mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3 collected in proton-proton collisions at a centre-of-mass energy of TeV. The differential production cross-sections times dimuon branching fractions are measured as functions of the transverse momentum and rapidity, over the ranges $p_{\rm T} Upsilon(1S) X) x B(Upsilon(1S) -> mu+mu-) = 1.111 +/- 0.043 +/- 0.044 nb, sigma(pp -> Upsilon(2S) X) x B(Upsilon(2S) -> mu+mu-) = 0.264 +/- 0.023 +/- 0.011 nb, sigma(pp -> Upsilon(3S) X) x B(Upsilon(3S) -> mu+mu-) = 0.159 +/- 0.020 +/- 0.007 nb, where the first uncertainty is statistical and the second systematic
Study of forward Z + jet production in pp collisions at √s=7 TeV
A measurement of the +jet production cross-section in collisions at a centre-of-mass energy TeV is presented. The analysis is based on an integrated luminosity of recorded by the LHCb experiment. Results are shown with two jet transverse momentum thresholds, 10 and 20 GeV, for both the overall cross-section within the fiducial volume, and for six differential cross-section measurements. The fiducial volume requires that both the jet and the muons from the Z boson decay are produced in the forward direction (). The results show good agreement with theoretical predictions at the second-order expansion in the coupling of the strong interaction.A measurement of the +jet production cross-section in collisions at a centre-of-mass energy TeV is presented. The analysis is based on an integrated luminosity of recorded by the LHCb experiment. Results are shown with two jet transverse momentum thresholds, 10 and 20 GeV, for both the overall cross-section within the fiducial volume, and for six differential cross-section measurements. The fiducial volume requires that both the jet and the muons from the Z boson decay are produced in the forward direction (). The results show good agreement with theoretical predictions at the second-order expansion in the coupling of the strong interaction
Mapping of Stockholm, Gothenburg and Malmo's handling of the million programme areas
Miljonprogrammet är namnet på det politiska projektet som pågick mellan åren 1965 och 1974 då riksdagen fattat ett beslut om att en miljon nya bostäder skulle byggas i Sverige, för att råda bot på bostadsbristen. Nu är det mer än 40 år sedan byggnaderna uppfördes och renoveringsbehovet är ett faktum, vilket gör ämnet aktuellt. Huvudsyftet med studien är att kartlägga de tre största städernas hantering av renoveringsbehovet. Huvudfrågan för studien är hur miljonprogrammets bostäder hanteras idag. Samtidigt har en rad andra frågor besvarats i studien; vilka skillnader som finns i lagarna då och nu, hur miljonprogramsområdena ser ut i de olika städerna och hur de behandlas i översiktsplanerna, vilka följder som uppstår av att husen behöver renoveras samt om det finns någon ekonomi i att renovera husen.Studien har genomförts med en kombination av kvalitativ och kvantitativ metod. En kvalitativ genomgång av skrivet material med anknytning till miljonprogrammet i de tre städerna har gjorts. Därutöver har också en kvantitativ enkätundersökning skickats ut till de tre kommunerna och dess kommunala bostadsbolag.Stockholm, Göteborg och Malmö har både likheter och skillnader gällande planering och visioner. Både Stockholm och Göteborg har valt att placera sina miljonprogramsområden utanför stadskärnan medan Malmös ligger i nära anslutning till centrum. De har alla visioner i sina översiktsplaner om att skapa en mer enhetlig och sammankopplad stad genom ökad integration och bättre kommunikationer mellan stadens olika delar.Det uppstod en renoveringsvåg under 80- och 90-talet i samband med ROT-avdraget och idag pågår flera projekt kring miljonprogrammet. Fasadrenovering är vanligt i alla tre städerna och även till viss del upprustning av balkonger och fönster. Göteborg har satsat mycket på energieffektiviserande åtgärder och i Stockholm har det blivit allt vanligare med energi-besparade ingrepp såsom tilläggsisolering.Lagstiftningen i Sverige har stor betydelse vid renoveringen då det idag finns krav på bl.a. energieffektivitet men även under renoveringsvågen på 80- och 90-talet då varsamhetskravet infördes i PBL 1987. Stommen i bostäderna är bra och de är funktionellt byggda vilket gör att renovering är mer kostnadseffektivt än att riva och bygga nytt. Problemet ligger alltså inte i renoveringsbehovet, då de flesta hus behöver renoveras efter så pass många år, utan antalet hus som behöver renoveras.The million programme is a building era that took place between the years 1965 to 1974 when a politic decision was made to build a million new residences in Sweden, to correct the housing shortage. It´s now been more than 40 years since these residences were built and the need to renovate is a necessity, which makes this programme a very current subject. The purpose of this study is to map the three largest city´s handling of the need for renovation. The main question of this study is how the buildings of the million programme is being handled today. Meanwhile a series of other questions have been answered in this study; the difference between laws now and then, how the million programme areas looks in the different cities and how they are treated in the layout plans, what the need for renovation might lead to, and if there is any profit in restoring the buildings.It is a qualitative study as it is a situation in a few cities that are being studied, but through a survey this study gets a quantitative mixture as well. A survey was dispatched to the three municipalities and their communal real estate companies.Malmo, Gothenburg and Stockholm are both similar and different regarding planning and visions. Both Gothenburg and Stockholm placed their million programmes outside of the city´s core, whilst Malmo´s was located close to the centre of the city. They all have visions in their layout plans to create a more unified and connected city through increased integration and better communication between the city areas.There was a wave of renovation in the eighties and nineties because of the ROT-deduction and many projects concerning the million programme are still ongoing to this day. Facade renovation is common in all three cities and, to a certain degree, restoration of balconies and windows. Gothenburg has invested a lot in energy efficient measures and in Stockholm it has become increasingly more common with energy saving interventions like adding increased isolation. The image of the million programme´s constructions is "concrete ghettos", but the most common houses consists of three storeys with apartment size 3 rok.The Swedish legislation are of great importance during the renovation as there now are requirements on energy efficiency amongst other things, but also during the wave of renovation in the eighties and nineties when the demand of discretion was enforced in PBL 1987. The foundation in the million programme houses is satisfactory and they are functionally built which makes a renovation more cost-efficient than it would be to tear it down and build new buildings. The problem then does not reside in the need for renovation, as most houses needs restoration after so many years, but in the sheer number of buildings that would require a renovation
Recommended from our members
Why Stop at Two Opinions? Reply to McCrae (2020)
McCrae (2020) argues that it is premature to explore interventions focused on personality change. In his commentary, he suggests that interventions should be promoted only if their effects in self-report data are confirmed by the additional opinion of informants. We agree with the essence of his position and would go further by envisioning a new framework for rigorous collaborative research on personality change (Bleidorn et al., 2020). We nevertheless maintain that policymakers would benefit from considering the additional opinion of personality scientists.Non peer reviewe