Results 61 to 70 of about 347,806 (306)

Toward Energy Efficient Electrochemical Valorization of Waste Nitrate and Sulfide

Advanced Materials, EarlyView.
This work introduces an integrated electrochemical strategy couples nitrate reduction with sulfide oxidation for energy‐efficient wastewater valorization. A Cu‐Co dual‑site catalyst, engineered for close proximity, promotes *NO2 relay and subsequently NH3 formation, enabling the system to operate at substantially reduced cell voltages and produce high ...
Bihao Hu, Yifan Zhou, Xiaoyuan Zhang, Shibo Xi, Qian He, Lei Wang   +5 more
wiley   +1 more source

Double Exponential Instability of Triangular Arbitrage Systems

, 2012
If financial markets displayed the informational efficiency postulated in the efficient markets hypothesis (EMH), arbitrage operations would be self-extinguishing. The present paper considers arbitrage sequences in foreign exchange (FX) markets, in which
A. A. Cournot, B. R. Marshall, BIS, BIS, BIS, C. D'Souza, E. A. Asarin, E. F. Fama, G. Cassel, IMF, J. M. Keynes, M. Klau, P. H. Dybvig, P. Samuelson, Q. F. Akram, R. Cross, R. Jungers, S. A. Ross, S. J. Grossman, V. Covrig, V. Kozyakin, Z. Xiaochuan   +21 more
core   +1 more source

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Análise da eficiência do mercado futuro brasileiro de boi gordo usando co-integração

Revista de Economia e Sociologia Rural, 2009
A hipótese de que os preços futuros são preditores não viesados dos preços à vista é uma hipótese conjunta de que os mercados são eficientes e que não existe prêmio ao risco.
André Steffens Moraes, Ricardo Chaves Lima, André de Souza Melo   +2 more
doaj   +1 more source

The efficient market hypothesis: Evidence from ten African stock markets [PDF]

The paper investigates the weak-form efficiency of ten African stock markets using the runs test methodology for serial dependency. Returns are calculated using the adjusted trade-to-trade approach.
Biekpe, Nicholas, Mlambo, Chipo
core   +1 more source

Low Resistance Interphase Formation at the PEO‐LiTFSI|LGPS Interface in Lithium Solid‐State Batteries

Advanced Materials Interfaces, EarlyView.
Interfacial charge transfer and low‐resistance interphase formation between PEO‐based polymer and Li10GeP2S12 solid electrolytes are investigated using multi‐electrode impedance spectroscopy and advanced analytical techniques such as XPS and ToF‐SIMS.
Ujjawal Sigar, Timo Weintraut, Sebastian L. Benz, Semih Engün, Sascha Kremer, Anja Henss, Felix H. Richter   +6 more
wiley   +1 more source

التحليل الاقتصادي لكفاءة الاسواق المالية دليل تجريبي لبعض الاسواق العربية

مجلة الغري للعلوم الاقتصادية والادارية, 2015
تختبر هذه الد ا رسة فرضیة كفاءة الاسواق المالیة لبعض الاسواق العربیة ، من خلال بیانات یومیة حیث تم اختبار فرضیة السیر ،PP وفیلبس بارون ،ADF وباستخدام اختبار دیكي-فوللر الموسع Variance Ratio العشوائي لعوائد مؤش ا رت الاسهم للاسواق العربیة، ومن ثم اختبار ...
عبد الحسين جليل الغالبي, حسن شاكر الشمري   +1 more
doaj   +1 more source

Photothermomechanically Efficient, Low‐Cost, High‐Cycle‐Life, Hybrid MXene‐Polymer Actuators

Advanced Materials Technologies, EarlyView.
The addition of MXenes to elastomer‐plastic‐paper films enables the creation of easily prepared actuators that are scalable for small robotic applications. Known as MXene‐polymer Trilayer Actuators (MPTAs), they bend from UV light. Their usefulness is demonstrated through kirigami‐inspired flower‐shaped art design, parallel manipulator for waveguiding,
Ken Iiyoshi, Georgios Korres, Orsolya Nagy, Gabriel Roldán, Panče Naumov, Stefan Schramm, Mohamad Eid   +6 more
wiley   +1 more source

Editorial Statement and Research Ideas for Efficiency and Anomalies in Stock Markets

Economies, 2020
The Efficient Market Hypothesis states that it is impossible for an investor to outperform the market because all available information is already built into stock prices.
Wing-Keung Wong
doaj   +1 more source

A study of market efficiency in the stock market, forex market and bullion market in India [PDF]

This study suggests that, run test, which are based on signs of indices / rates, do not reject efficient market hypothesis in the case of all the three markets, whereas VR tests, which capture the variation in permanent component of the series as a ratio
Ghosh, Bikash Kumar, Sarker, Debnarayan
core   +1 more source