75 research outputs found
The great crested grebe (Podiceps cristatus)
Get PDFАвтор даёт художественную интерпретацию мира чомги - культовой птицы «Полимусейона».The author gives an artistic interpretation of the great crested grebe, the world-iconic bird of “Polimusejon”
Do Individuals Recognize Cascade Behavior of Others? - An Experimental Study -
Get PDFIn an information cascade experiment participants are confronted with artificial predecessors predicting in line with the BHW model (Bikchandani et al., 1992). Using the BDM (Becker et al., 1964) mechanism we study participants' probability perceptions based on maximum prices for participating in the prediction game. We find increasing maximum prices the more coinciding predictions of predecessors are observed, regardless of whether additional information is revealed by these predictions. Individual price patterns of more than two thirds of the participants indicate that cascade behavior of predecessors is not recognized.Information Cascades, Bayes' Rule, Decision Under Risk and Uncertainty, Experimental Economics.
\u3ci\u3eDiving Birds of North America\u3c/i\u3e: Color Plates
Get PDF1. Arctic loon, adult in breeding plumage. Photo by author. 2. Red-throated loon, nesting adult. Photo by Kenneth W. Fink. 3. Yellow-billed loon, adult in breeding plumage. Photo by Kenneth W. Fink. 4. Common loon, nesting adult. Photo by Kenneth W. Fink. 5. Pied-billed grebe, adult in breeding plumage. Photo by author. 6. Least grebe, adult and young. Painting by Mark E. Marcuson. 7. Red-necked grebe, nesting adult. Photo by author. 8. Eared grebe, adults with young. Photo by Kenneth W. Fink. 9. Horned grebe, nesting adult. Photo by Kenneth W. Fink. 10. Western grebe, adult with young. Photo by Gary Nuechterlein. 11. Downy young of grebes, including light (top left) and dark phases (top right) of western, black-necked (upper left), horned (middle left), least (lower left), red-necked (middle right), and pied-billed (lower right). Painting by Jon Fjeldså. 12. Dovekie, adult in breeding plumage. Photo by Frank S. Todd. 13. Razorbill, adult in breeding plumage. Photo by author. 14. Common murre, adult in winter plumage. Photo by author. 15. Thick-billed murre, adult in breeding plumage. Photo by author. 16. Black guillemot, adult in breeding plumage. Photo by Frank S. Todd. 17. Pigeon guillemot, breeding colony. Photo by Frank S. Todd. 18. Pigeon guillemots, immature plumage (left), rhinoceros auklet (middle), and common murre, breeding plumage (right). Photo by author. 19. Marbled murrelet, incubating adult. Photo by Stuart Johnson. 20. Kittlitz murrelet, incubating adult. Photo by David G. Roseneau. 21. Cassin auklet, immature plumage. Photo by author. 22. Parakeet auklet, adults in breeding plumage. Photo by author. 23. Crested auklet, adults in breeding plumage. Photo by author. 24. Crested and least auklets, adults in breeding plumage. Photo by author. 25. Least auklet, juvenal plumage. Photo by Frank S. Todd. 26. Whiskered auklet, juvenal plumage. Photo by C. Fred Zeillemaker. 27. Whiskered, least, and crested auklets, breeding adults. Painting by Mark C. Marcuson. 28. Rhinoceros auklet, adult in breeding plumage. Photo by Frank S. Todd. 29. Tufted puffin, adults in breeding plumage. Photo by author. 30. Atlantic puffin, breeding colony. Photo by Frank S. Todd. 31. Atlantic puffin, adult in breeding plumage. Photo by Frank S. Todd. 32. Horned puffin adults in breeding plumage. Photo by author
Grebes (Podicipedidae): distribution and number during the breeding season in Saaremaa
Get PDFBakalaureusetöö
Loodusturismi õppekavalPütlaste (tuttpütt, hallpõsk-pütt, sarvikpütt, mustkael-pütt ja väikepütt) arvukus Saaremaal
on seni olnud täpsemalt teadmata ning levikut eriti uuritud ei ole.
Töö eesmärgiks on võtta vaatluse alla kõik Saaremaal esinevad pütiliigid ning koguda
täpsemaid andmed nende pesitsusaegse leviku ja arvukuse kohta Saaremaal perioodil
2015-2021.
Andmeid koguti varasemate seirete aruannetest ning välitöödel vaatluseid ja seireid läbi
viies. Andmete analüüsimisel hinnati pütlaste pesitsusaegset levikut Saaremaal. Andmeid
analüüsides saadi 2015.-2021. aasta seisuga pütlaste pesitsusaegseks arvukuseks
Saaremaal järgmised tulemused: tuttpütti 1847 paari, hallpõsk-pütti 51 paari, sarvikpütti
66 paari, väikepütti kaks paari ning mustkael-pütti kohta andmed puudusid. Töö autor
hindab tegelikku tuttpüti arvukust 1800-2000 paarini, hallpõsk-püti ja sarvikpüti tegelikku
arvukust 60-70 paarini ning väikepüti tegelikku arvukust 5-10 paarini.
Tulemustest selgus, et pütlaste arvukust on varasemalt hinnatud tegelikkusest väiksemaks,
kuna tulemused olid enamike liikide puhul oodatust suuremad. Viimast tuleb arvestada
järgmisel ametlikul pütlaste arvukuse hindamisel Eestis. Töö tulemused saab võtta aluseks
pütlaste edasisel uurimisel ning loendusmetoodika täiendamisel.The number and distribution of Grebes (Great Crested Grebe, Red-necked Grebe, Horned
Grebe, Black-necked Grebe and Little Grebe) in Saaremaa has not been much studied in
detail.
The aim of the study was to collect more detailed data on Grebe’s distribution and number
during the breeding season in Saaremaa in the period 2015-2021.
Data was collected from previous monitoring reports and during fieldwork. Based on the
data was estimated the number of Grebes during the breeding season in Saaremaa.
Analysing data from period 2015-2021 the results showed that in total there were 1847
pairs of Great Crested Grebe, 51 pairs of Red-necked Grebe, 66 pairs of Horned Grebe,
two pairs of Little Grebe and zero pairs of Black-necked Grebe during the breeding season
in Saaremaa. The author estimates the actual number of Great Crested Grebe to 1800-2000
pairs, the actual number of Red-necked Grebe and Horned Grebe to 60-70 pairs, and the
actual number of Little Grebe to 5-10 pairs.
The results showed that the numbers of Grebes were previously estimated to be lower than
they were, as the results were higher than expected. The results must be considered
estimating the next official number of Grebes in Estonia. The results also can be used as
a basis for further research of Grebes and improvement of methodology of monitoring
Grebes
European perspectives on student mobility and competencies in tertiary education: What we have learned in the past 20 years
No full textThe author aims to examine the literature on student mobility and competencies in tertiary education with a focus on Europe and analyse the impact of international short-term student mobility on the acquisition of competencies for employability in the 21st-century labour market. The article focuses on the Erasmus program and university education. It examines the relationship between short-term student mobility experiences, the development of soft skills, and their relevance to future employment, providing valuable insights for educational institutions and policymakers. The article highlights the importance of intercultural competencies, collaboration, communication, problem-solving, and critical thinking skills in preparing students for the evolving demands of the workforce. It also emphasises the need for curriculum adaptations and closer cooperation between tertiary-level educational institutions and industry to bridge the skills gap and enhance graduates' employability. The author aims to provide a more comprehensive and in-depth understanding of the relationship between short-term student mobility, competencies, and future employability
Toward an understanding of student Erasmus+ traineeships of Prague University of Economics and Business
No full textThe author aims to provide a basic analysis in the form of a comprehensive overview, map indicators, motivational factors, and benefits of traineeships of the Prague University of Economics and Business (hereafter referred to as VéSE) students who completed traineeships in 2014-2019 and were financially supported by the Erasmus+ programme. Among the student's obligations to provide this financial support is their final report from the mobility, completed in the Mobility Tool of the European Commission. As the author has access to this database and the final reports as part of her work at VéSE, it is this database of completed questionnaires that provides an overview of students' motivation for traineeships abroad and their contribution in terms of personal and professional
Differential Dynamic Programming for Aerial Robots using an Aerodynamics Model
No full textState of the art trajectory generation schemes for quadrotors assume a simple dynamic model. They neglect aerodynamic effects such as induced drag and blade flapping and assume that no wind is present. In order to overcome this limitation, this thesis investigates a trajectory optimization scheme based upon Differential Dynamic Programming (DDP). There are various software-implementations of the DDP scheme. For future deployment on robotic hardware the software is required to be computationally efficient and to be open-source. The C++ template-based optimization library named GCOP developed at JHU was deemed suitable so it was selected for this purpose. Before implementing the solver, a full model of the Crazyflie Nano Quadcopter is identified experimentally. The model considers a first order term for the aerodynamic forces in each axis of the body frame. The solver is validated, normalized and the performance is benchmarked. This method yields reliable minimum control-effort trajectories. The computation time required to reach the optimum solution is studied for different dicretizations, and for different choices of solver parameters. A control scheme is proposed and studied in Monte-Carlo simulations. It is robust and able to handle large modelling errors in mass and moment of inertia while ensuring minimal error on the final state
7/2000: Greeting addresses, clothing donations, cadre training: On the solidarity of the SED with the Spanish Communist Party
No full textDie Unterstützung „befreundeter Bruderparteien und Organisationen“ war in der DDR auf vielen Ebenen wichtiger Bestandteil gesellschaftlichen Handelns. Besonders durch die Teilnahme deutscher Kommunisten am spanischen Bürgerkrieg (1936-1939) waren zur kommunistischen Partei Spaniens wichtige Verbindungen entstanden, die auch in der DDR zu zahlreichen solidarischen Interaktionen führte. Der Artikel analysiert anhand der Akten der Abteilung Internationale Verbindungen des ZK der SED in der Stiftung Parteien- und Massenorganisationen der DDR im Bundesarchiv (SAPMO BArch, Berlin) solche Beziehungen. Zudem führte die Autorin ein Interview mit Santiago Carrillo, dem ehemaligen Generalsekretär der Kommunistischen Partei Spaniens.Support for "friendly brother parties and organisations" was an important component of social action at many levels in the GDR. Especially the participation of German communists in the Spanish Civil War (1936-1939) had created important links to the Spanish Communist Party, which also led to numerous solidary interactions in the GDR. The article analyses such relations on the basis of the files of the International Relations Department of the CC of the SED in the Foundation for Party and Mass Organisations of the GDR in the Federal Archives (SAPMO BArch, Berlin). In addition, the author conducted an interview with Santiago Carrillo, the former Secretary General of the Spanish Communist Party
Podiceps ruficollis
No full textRecopilación de observaciones sobre ecología general, anidamiento y cría del Zampullín común (Tachybaptus ruficollis, anotado como Podiceps ruficollis por el autor) realizadas durante numerosas salidas de campo a diferentes enclaves de las provincias de Burgos y Valladolid, entre el 19 de Mayo de 1943 y el 25 de marzo de 1952. Incluye ilustración a acuarela de dos individuos.Compilation of general ecology, nesting and breeding observations of the Little Grebe (Tachybaptus ruficollis, refered as Podiceps ruficollis by the author) achieved through several field trips to different habitats of the province of Valladolid, between the 19th of May of 1943 and the 25th of March of 1952. A watercolor illustration of two birds is included
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