Results 291 to 300 of about 5,038,638 (360)

Dye-sensitized solar cells with 13% efficiency achieved through the molecular engineering of porphyrin sensitizers.

Nature Chemistry, 2014
Dye-sensitized solar cells have gained widespread attention in recent years because of their low production costs, ease of fabrication and tunable optical properties, such as colour and transparency. Here, we report a molecularly engineered porphyrin dye,
S. Mathew, A. Yella, P. Gao, R. Humphry‐Baker, B. Curchod, Negar Ashari-Astani, I. Tavernelli, U. Rothlisberger, Md. K. Nazeeruddin, M. Grätzel   +9 more
semanticscholar   +1 more source

Knowing efficiency: the enactment of efficiency in efficiency auditing

Accounting, Organizations and Society, 1999
Abstract This paper reports an ethnographic study of the activities of auditors in the field as they work to fulfil an efficiency auditing mandate; it analyses how auditors report on efficiency in practice. Miller and Rose's work on governmentality ( Miller & Rose (1990) . Governing economic Life.
openaire   +1 more source

Efficiency of various recent wastewater dye removal methods: A review

Journal of Environmental Chemical Engineering, 2018
Dye effluents released from numerous dye-utilizing industries are harmful towards the environment and living things. Consequently, existence of dye effluent in environmental water bodies is becoming a growing concern to environmentalists and civilians. A
V. Katheresan, Jibrail Kansedo, S. Y. Lau   +2 more
semanticscholar   +1 more source

Single‐Junction Organic Photovoltaic Cells with Approaching 18% Efficiency

Advances in Materials, 2020
Optimizing the molecular structures of organic photovoltaic (OPV) materials is one of the most effective methods to boost power conversion efficiencies (PCEs).
Yong Cui, H. Yao, Jianqi Zhang, Kaihu Xian, Tao Zhang, Ling Hong, Yuming Wang, Ye Xu, Kangqiao Ma, Cunbin An, Chang He, Zhixiang Wei, F. Gao, Jianhui Hou   +13 more
semanticscholar   +1 more source

Efficiently learning efficient programs

2017
Discovering efficient algorithms is central to computer science. In this thesis, we aim to discover efficient programs (algorithms) using machine learning. Specifically, we claim we can efficiently learn programs (Claim 1), and learn efficient programs (Claim 2).
openaire   +3 more sources

Efficient Efficiencies Analysis

The Antitrust Bulletin, 2015
Efficiencies analysis is both an important area and one where research efforts can be particularly productive. Thinking of efficiencies and competitive effects together as components of a unified analysis is a productive conceptual framework and one that may yield methodological advances.
openaire   +1 more source

Memory Efficiency

Journal of the ACM, 1959
Memory is the heart of today's electronic computers—memory serving as a fast-access storage unit and also being used in the execution of computer commands. The problem of memory efficiency, therefore, is one of great importance. Complete efficiency has not yet been attained and research to achieve it has been up to now rather limited.
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On the Efficiency of Algorithms

Journal of the ACM, 1970
A definition is given of the efficiency of an algorithm considered as a whole. This immediately raises the question of whether it is possible to find the most efficient or “optimum” algorithm. It is shown that an optimization problem of this kind is effectively solvable if and only if the set of arguments with which one is concerned is a finite one ...
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On Price Efficiency

International Economic Review, 1990
In many instances, a firm's observed production choices will not be consistent with profit maximization or cost minimization at market prices. Such firms are generally assumed to minimize cost with respect to shadow prices. The authors extend this shadow cost function approach to allow for the identification of firm-specific shadow prices.
Fare, Rolf, Grosskopf, Shawna, Nelson, Julianne   +2 more
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On efficient entreeings

Acta Informatica, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Paul S. Amerins, Ricardo A. Baeza-Yates, Derick Wood   +2 more
openaire   +2 more sources