5,497 research outputs found
Geologic History of the Californian Insular Flora
No full textAxelrod, Daniel I. “Geologic History of the Californian Insular Flora.” In: 1st Symposium on the Biology of the California Islands. National Park Service, 1965. 267-314
Discussion of relationships in Pinus
No full textAxelrod, Daniel I. et al. "Discussion of relationships in Pinus." In: 1st Symposium on the Biology of the California Islands. National Park Service, 1965. 179-180
Deutliche und gründliche Erklärung der Adelichen und Ritterlichen freyen Fecht-Kunst : Lectionen auff den stoß/ und deren gebrauchs eigentlicher Nachricht. Auff die rechte Italianische Art und manir, in dieses Tractätlein verfaßt/ und mit nothwendigen Kupfferstücken nach möglichkeit gezieret und vor Augen gestelt / Durch Jeann Daniel L'Ange ...
No full textEvolution of the Californian Closed-Cone Pine Forest
No full textFossil closed-cone pines similar to Californian species that now inhabit maritime and interior areas were alreadv established as distinct adaptive groups in Miocene time. Th~ir fossil associates suggest that floristically the closed-cone pine forests are part of the Madro-Tertiary Geoflora. Species ancestral to the pines and their associated endemics evidently represented members of a highly temperate phase of the geoflora that reached the coastal strip in Oligocene time. The pines and their associates probably did not evolve in insular isolation, but in the temperate uplands in the interior. As more extreme climates developed there, the pine forests migrated coastward to survive under mild maritime climate, and also southward where related species persist in the uplands of Mexico under highly temperate climate.Axelrod, Daniel I. "Evolution of the Californian Closed-Cone Pine Forest" In: 1st Symposium on the Biology of the California Islands. National Park Service, 1965. 93-149
Transforming Power Relationships: Leadership, Risk, and Hope. IHS Political Science Series No. 135, May 2013
No full textChronic communal conflicts resemble the prisoner’s dilemma. Both communities prefer peace to war. But neither trusts the other, viewing the other’s gain as its own loss, so
potentially shared interests often go unrealized.
Achieving positive-sum outcomes from apparently zero-sum struggles requires a kind of riskembracing leadership. To succeed leaders must: a) see power relations as potentially
positive-sum; b) strengthen negotiating adversaries instead of weakening them; and c) demonstrate hope for a positive future and take great personal risks to achieve it.
Such leadership is exemplified by Nelson Mandela and F.W. de Klerk in the South African democratic transition. To illuminate the strategic dilemmas Mandela and de Klerk faced, we examine the work of Robert Axelrod, Thomas Schelling, and Josep Colomer, who highlight important dimensions of the problem but underplay the role of risk-embracing leadership. Finally we discuss leadership successes and failures in the Northern Ireland settlement and the Israeli-Palestinian conflict
Ethnic identity, political identity and ethnic conflict: simulating the effect of congruence between the two identities on ethnic violence and conflict
No full textThis thesis outlines and presents an alternative hypothetical process to the emergence of ethnic conflict. Ethnic conflicts, rather than being dependent upon pre-existing 'ancient hatreds', are instead the result of a congruence between ethnic and political identity which grants individuals the ability to use ethnicity to identify and eliminate political threats. This hypothesis is formed by the examination of three case studies of ethnic conflict: Lebanon, Northern Ireland and Croatia. This hypothesis is then formalised and tested using an agent based simulation in which agent interactions are dependent upon ethnic and political identity and the congruence between the two. As predicted there was a strong positive correlation between how accurately ethnic identity reflected political identity and the level of ethnically motivated violence in the simulation, although the relationship was not linear. Furthermore the effect of a shift in congruence was found to be roughly comparable to the effect of initialising agents with a moderate level of pre-existing ethnic antagonism
Cleared Leaf Collection
No full textThe University of California-Berkeley Museum of Paleontology has recently launched this online database of the Daniel I. Axelrod and the Berkeley leaf collections, which contain over 2000 modern leaf specimens bleached and stained to make their venation patterns more visible. Data records for both collections are now online, and images (including a higher resolution mode) will eventually become available for each specimen beginning with those in the Axelrod collection. Using the database is somewhat tricky, but a detailed help page is provided
Technique development in super-resolution fluorescence microscopy.
No full textI present three projects all of which involve innovations in fluorescence microscopy. First I present a microscopy method whereby the angular dependence of a fluorophore's emission pattern near a bare glass surface or metal-coated surface that supports surface plasmon resonance is measured. This technique involves altering the microscope optics to directly record (on a CCD camera) the intensity pattern at the objective's back focal plane. This intensity pattern directly maps the angular emission pattern of fluorescence. The experimental emission profile on both glass and aluminum-coated surfaces is anisotropic with a peak at either the critical angle or both the critical angle and the surface plasmon angle. The observed profiles on both glass and aluminum-coated surfaces are anisotropic and agree well with computer calculations. Second I present a new fluorescence resonance energy transfer (FRET) method based on polarization that determines FRET using data from a single camera exposure, offering better time resolution of dynamic associations. Polarized FRET uses a simultaneous combination of excitation wavelengths from two orthogonally polarized sources, along with an emission channel tri-image splitter outfitted with appropriate polarizers, to concurrently excite and collect fluorescence from free donors, free acceptors, and FRET pairs. The pixel-by-pixel concentrations of all molecules can then be determined. Here I present the theory of polarized FRET and examine its feasibility through both theoretical investigation and experimental confirmation on mixtures of fluorescent proteins expressed in living cells. Third, I present a method for directly measuring the depth and purity of the evanescent field used for fluorophore excitation in total internal reflection fluorescence (TIRF) microscopy. This technique involves microscopic observation of low refractive index, fluorescently labeled, spherical beads in an index-matched solution. With both the 1.45 NA and 1.65 NA objectives on the Olympus microscope the profile of the evanescent field fits well to a double exponential with 90% of the field represented by an exponential with a decay rate close to that expected for a pure evanescent field and 10% of the field represented by an exponential with a much longer decay constant attributed to scattering.PhDBiological SciencesBiophysicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/124881/2/3163881.pd
Cirkulär ekonomi som ett beslut : En kvalitativ studie om hur soptunnemodellen förklarar implementeringen av cirkulär ekonomi i små och medelstora svenska bolag
No full textTitel: Cirkulär ekonomi som ett beslut: En kvalitativ studie om hur soptunnemodellen förklarar implementeringen av cirkulär ekonomi inom små och medelstora företag Nivå: Examensarbete på grundnivå (kandidatexamen) i ämnet företagsekonomi Författare: Daniel Jonsgården och Sakke Pellikka Handledare: Jean Mutiganda Datum: 2024 – januari Syfte: Flera studier visar på svårigheter och hinder för införandet av cirkulär ekonomi. Syftet med denna studie är att undersöka hur implementeringsbeslutet ser ut och därmed varför företag trots hinder väljer att implementera cirkulär ekonomi. Metod: Denna studie bygger på tre semistrukturerade intervjuer. Genom en tematisk analys med utgångspunkt i teorier om beslutstagande, undersöktes respondenternas praktiska erfarenhet och kunskap vid införandet av cirkulär ekonomi. Beslutsprocessen analyserades genom soptunnemodellen. Resultat och slutsats: Respondenterna beskrev hur de sett hållbarhet som en lösning även innan de identifierat problem att lösa. Resultatet visar att beslutstagarens kunskap om cirkulär ekonomi inte är viktigt för att ta beslutet, vilket går emot tidigare forskning. Först när lösning, problem, och beslutstagare existerar i ett och samma tillfälle kan ett beslut att ställa om till cirkulär ekonomi fattas. Examensarbetets bidrag: Studien bidrar till en utökat teoretisk förståelse för den cirkulära omställningen. Detta genom att vara en utgångspunkt för vidare forskning inom beslutsfattande för omställning till en cirkulär ekonomi. Förslag till fortsatt forskning: I studien identifieras ett forskningsgap gällande beslutsfattande avseende införande av cirkulär ekonomi och det finns ett behov av att fler fördjupningsstudier genomförs. Det finns även behov av vidare forskning kring både hur beslutspersoner blir motiverade till omställning mot cirkulär ekonomi, samt vilken roll en beslutsfattare behöver ha.Title: Circular economy as a decision: A qualitative study on how the garbage can model can explain the implementation of circular economy in small and medium sized entities. Level: Student Thesis, final assignment for bachelor’s degree in business administration Author: Daniel Jonsgården and Sakke Pellikka Supervisor: Jean Mutiganda Date: 2024 - January Aim: Multiple studies shows the difficulties and barriers surrounding the implementation of Circular economy. The aim of this study is to investigate what the decision to implement looks like and thereby why companies decide to start working with Circular economy. Method: This study builds on three semi-structured interviews. Through thematic analysis deriving from theories of decision making, the respondents' practical experience and knowledge at the time of implementation of circular economy was investigated. The decision-making process was analysed through the garbage can model. Results and conclusions: The respondents described how they have seen sustainability as a solution even before they identified a problem to solve. The result shows that the decision makers knowledge of Circular economy is not important in making the decision, which goes against previous research. Only when a solution, a problem, and a decision maker exist in the same moment can a decision to transition towards a circular economy be made. Contribution of the thesis: This thesis contributes by expanding the theoretical knowledge surrounding the circular transitioning. It does this by being a starting point for future research about the decision making that leads to a circular economy. Suggestions for future research: We have in this study identified a research gap and would like more studies done to fill that gap. We also suggest future research both surrounding how decision makers become motivated to transitioning towards a circular economy, as well as which role the decision makers need to have
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