On a superlinear periodic boundary value problem with vanishing Green's function

We prove the existence of positive solutions for the boundary value problem $$\begin{cases} y^{\prime \prime }+a(t)y=\lambda g(t)f(y),\quad 0\leq t\leq 2\pi, \\ y(0)=y(2\pi ),\quad y^{\prime }(0)=y^{\prime }(2\pi ), \end{cases}$$ where $\lambda$ is a positive parameter, $f$ is superlinear at $\infty$ and could change sign, and the associated Green's function may have zeros

Analyzing Effects of Institutional Quality on Banking Stability: Evidence from Asean Countries

Purpose: The aim of this study is to examine the effect of institutional quality on bank stability using bank-level data from 2010 to 2020.   Theoretical framework: The study considers institutions from the perspective of governance institutions. Accordingly, the concept of government institutions is related to the country's organizational foundation in terms of governance, implying institutional quality.   Design/methodology/approach: The study uses GMM method and also choose the Zscore as the primary variable for bank stability.   Findings: The results show that institutional quality increases the stability of banks. Moreover, with the threshold model, the results show that countries with institutional quality above the threshold will increase the stability of banks. In addition, macroeconomic and banking characteristics variables such as total assets, income diversification, quality of control, inflation, and GDP growth rate have a high significance in the model.   Research, Practical & Social implications: The study shows The study's empirical results have specific policy implications for the Government in implementing policies related to institutional quality to improve bank stability.   Originality/value:   there are not many researches done to investigate institutional quality to improve bank stability. Moreover, from economic crisis, the matter of banking stability is among main concerns of many researches. Second, previous researches just focus on the aspect of corruption and ignore other aspects or other factors. That’s why authors conduct this research

Analysis of Electromagnetic Parameters of Hybrid Externally Excited Synchronous Motors for Electric Vehicle Applications

This paper presents two different approaches to improve the electromagnetic torque and output power of the hybrid Externally Excited Synchronous Motor (EESM) applied to Electric Vehicles (EVs). An analytical approach is first considered to define the main parameters of the proposed machine. Based on the obtained results from the analytical model, the hybrid EESM is designed with different rotor shapes and step-skewing magnet segments to reduce the total losses and improve torque ripple. Then, Finite Element Analysis (FEA) is applied to compute and simulate electromagnetic parameters, such as the magnetic flux density, mean torque, and output power. The development of these two approaches is validated on an actual EESM machine and the agreement with the theory is shown