نتایج جستجو برای: work function
تعداد نتایج: 2050362 فیلتر نتایج به سال:
8 The properties of a halogen-covered platinum (111) surface have been studied using density func9 tional theory (DFT) as halides are often present at electrochemical electrode/electrolyte interfaces. 10 We focused in particular on the halogen-induced work function change as a function of coverage 11 of fluorine, chlorine, bromine and iodine. For electronegative adsorbates, an adsorption-induce...
The work function of metal substrates can be easily tuned, for instance, by adsorbing layers of molecular electron donors and acceptors. In this work, we discuss the possibility of changing the donor/acceptor mixing ratio reversibly after adsorption by choosing a donor/acceptor pair that is coupled via a redox reaction and that is in equilibrium with a surrounding gas phase. We discuss such a s...
The Work Function Algorithm (WFA) is the most effective deterministic on-line algorithm for the k-server problem. E. Koutsoupias and C. Papadimitriou in [6] proved that WFA is (2k − 1)-competitive and it is conjectured that it is k-competitive. However the best known implementation of WFA requires time O(i2) to process request ri and this makes WFA impractical for long sequences of requests. Th...
We revisit the known work function online algorithm WFA for metrical task systems in the special case when there are only two states. We offer a slightly modified version of this algorithm, and show that our version exactly mimics the migration pattern of the best possible offline algorithm, though the timing of the migration events is somewhat different in these two algorithms. We use this to ...
The adsorption of molecular acceptors is a viable method for tuning the work function of metal electrodes. This, in turn, enables adjusting charge injection barriers between the electrode and organic semiconductors. Here, we demonstrate the potential of pyrene-tetraone (PyT) and its derivatives dibromopyrene-tetraone (Br-PyT) and dinitropyrene-tetraone (NO2-PyT) for modifying the electronic pro...
The aim of this paper is to explore function allocation from the perspective of studies of work practices and of the relationships between work and technology. In recent years we have conducted a number of studies broadly in the area of computer-supported collaborative work and also in the area of flight deck design methods. Our involvement in both of these areas has led us to think about the r...
What determines the shape, size, and force output of cardiac and skeletal muscle? Chicago architect Louis Sullivan (1856-1924), father of the skyscraper, observed that "form follows function." This is as true for the structural elements of a striated muscle cell as it is for the architectural features of a building. Function is a critical evolutionary determinant, not form. To survive, the anim...
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