Results 191 to 200 of about 1,363,926 (314)

Modelling and Forecasting Volatility of Returns on the Ghana Stock Exchange Using GARCH Models [PDF]

This paper models and forecasts volatility (conditional variance) on the Ghana Stock Exchange using a random walk (RW), GARCH(1,1), EGARCH(1,1), and TGARCH(1,1) models.
Frimpong, Joseph Magnus, Oteng-Abayie, Eric Fosu   +1 more
core   +1 more source

Seedless One‐Pot Synthesis of Colloidal InAs Quantum Dots Enabling a High‐Accuracy Photoplethysmography Oximeter

Advanced Science, EarlyView.
A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim, Seungin Jee, Yongnam Ahn, In Suh Lee, Dongeon Kim, Seongchong Park, Yujin Jung, In‐Ho Bae, Se‐Woong Baek   +8 more
wiley   +1 more source

An Empirical Study of the Relationship between Macroeconomic Variables and Stock Price: A Study on Dhaka Stock Exchange (DSE) [PDF]

Literature strongly supports vibration of the stock price as a consequence of various macroeconomic factors (Darrat, 1990; Fama & Schwert, 1977; Jaffe & Mandelker, 1976; Nelson, 1976; Pearce & Roley, 1985; Ripley, 1973).
Abdullah Ibneyy Shahid, Md. Didarul Alam, Md. Mohiuddin   +2 more
core  

Interfacially Reinforced Crosslinked Binder with Structural Integrity for Stable Micro‐Sized Silicon Anodes in All‐solid‐state Batteries

Advanced Science, EarlyView.
ABSTRACT All‐solid‐state batteries (ASSBs) have attracted considerable attention as next‐generation energy storage systems owing to their high energy density and safety. However, their performance is critically limited by insufficient solid–solid interfacial contact and severe chemomechanical degradation, particularly for micro‐sized silicon (µSi ...
Chanho Lee, Yuri Nam, Incheol Jeong, Seo Eun Lee, Taewook Kim, Jinhyung Kim, Wooseup Jo, Moonsu Yoon, Jongkyeong Lim, Seho Sun, Junghyun Choi, Chan Ho Park, Dongsoo Lee   +12 more
wiley   +1 more source

Forecasting the Pakistan’s Leading Stock Exchange During Covid-19 Using Machine learning (ML) Algorithms: Model Development and Validation

, 2023
Munir T, Mamlook REA, Rahman AR, Shrestha S, Bzizi M, Aljohani A.   +5 more
europepmc   +1 more source

Deep Volumetric Super‐Resolution Imaging in Thick Biological Specimens With Sparse Scanning SIM

Advanced Science, EarlyView.
Sparse scanning structured illumination microscopy (SS‐SIM) extends the axial depth in super‐resolution fluorescence imaging by combining rapid laser scanning, pixel‐addressed intensity modulation, and sCMOS camera detection. SS‐SIM yields 1.6× lateral and 1.7× axial resolution gains over wide‐field microscopy and enables imaging through 300–600 µm ...
Sha An, Xuhong Guo, Zhongxia Cai, Yunze Lei, Kai Wen, Hongfei Suo, Xiaoyu Kong, Gerd Ulrich Nienhaus, Peng Gao   +8 more
wiley   +1 more source

Short Term Reactions on the Bucharest Stock Exchange before and during Coronavirus Pandemic

, 2021
Dumitriu R, Stefanescu R.
europepmc   +1 more source

COVID-19 and stock exchange return variation: empirical evidences from econometric estimation.

Environ Sci Pollut Res Int, 2021
Latif Y, Shunqi G, Bashir S, Iqbal W, Ali S, Ramzan M.   +5 more
europepmc   +1 more source

The impact of COVID-19 on Karachi stock exchange: Quantile-on-quantile approach using secondary and predicted data. [PDF]

J Public Aff, 2020
Waheed R, Sarwar S, Sarwar S, Khan MK.
europepmc   +1 more source

Highly Efficient Extraction of 212 Pb/212Bi from the Decay Chain of 232Th‐Based on Anion Exchange in Bromide Medium

Advanced Science, EarlyView.
This work provides an effective strategy for selectively extracting 212Pb and 212Bi from the decay chain of 232Th as well as its mechanism illustration. Using the novel strategy, 2.07 MBq of 212Pb is successfully separated from 232Th and its daughters, which enables the supply of 212Pb/212Bi directly from the abundant natural thorium resource to be ...
Lifeng Chen, Wannian Feng, Yuezhou Wei, Xuexiang He, Shaoying Wang, Zhongyuan Zhou, Qiang Wu, Ningchao Zheng, Xiangbiao Yin, Wenlong Li, Lingling Su, Shunyan Ning   +11 more
wiley   +1 more source