Banking and FInance

This paper presents to the Wireless Power Transmission for Electric Vehicle by using a basic principle of Faraday’s Induction theory and resonance circuit. The developed prototype would converts the electricity energy to magnetic flux and it will travel to the receiver coil. Then receiver coil would converts the magnetic flux back to the electrical energy for charging battery. Since the wireless power transmission is applied to the developed prototype, the advantages of simple configuration and user friendly interface can be gained. In addition, safety and electromagnetic emission are considered in the proposed design

การส่งกาลังไฟฟ้าผ่านอากาศสาหรับรถยนต์ไฟฟ้า
บทความฉบับนี้จะนาเสนอระบบส่งกาลังไฟฟ้าไร้สายสาหรับรถยนต์ไฟฟ้า ด้วยหลักการวงจรเรโซแนนท์ และ ทฤษฏีการเหนี่ยวนาของฟาราเดย์ วงจรถูกออกแบบมาให้ทาการเปลี่ยนพลังงานไฟฟ้าไปเป็นฟลักซ์แม่เหล็ก และ ส่งมันไปยังขดลวดรับ จากนั้นขดลวดรับก็จะเปลี่ยนฟลักซ์แม่เหล็กกลับมาเป็นพลังงานไฟฟ้า เพื่อใช้ในการชาร์จแบตเตอรี่ หลังจากที่ได้มีการพัฒนาระบบส่งกาลังไฟฟ้าไร้สายสิ่งที่เป็นความท้าทายก็คือ การออกแบบให้ระบบนี้ ใช้งานได้ง่าย ปลอดภัย และ ได้มาตรฐานตามข้อกาหนดทางแม่เหล็กไฟฟ้า

In this paper two hedging models are studied in the context of the SPI futures. I analyze the hedge ratio and hedging effectiveness of the models relative to the naïve hedging model. Firstly, I find that Working's (1953) strategy enhances the performance of hedging over the naïve strategy. Secondly, based on risk reduction, the Variance Minimization model is found to be very useful. It performs better than the naïve model. The hedging effectiveness of a longer hedge duration is found to be more effective than a shorter one. Finally, the effects of time to expiration on hedge ratio and hedging effectiveness are not clear.

This study examines news shocks in theoretical real-business-cycle model in the aspect of emerging-market economy. Many features in emerging-market business cycles, such as consumption volatility that exceeds income volatility, sudden stop pattern in capital flows and strongly countercyclical current account to income, distinguish itself from a developed small opened economy, and in this study, it also differentiates itself from previous works in the literature by studying in the aspect of business cycles in emerging markets. The study uses simulation method, developing on real-business-cycle theory to generate artificial business cycle moments and impulse response function. For the result, it considers news shocks is one of the candidates to improve real-business-cycle model. Although the business cycle moments still cannot exactly match the real data, there are the signs of improvement in the model from employing the news shocks within the aspect of emerging-market economy. The im...

This study examines news shocks in theoretical real-business-cycle model in the aspect of emerging-market economy. Many features in emerging-market business cycles, such as consumption volatility that exceeds income volatility, sudden stop pattern in capital flows and strongly countercyclical current account to income, distinguish itself from a developed small opened economy, and in this study, it also differentiates itself from previous works in the literature by studying in the aspect of business cycles in emerging markets. The study uses simulation method, developing on real-business-cycle theory to generate artificial business cycle moments and impulse response function. For the result, it considers news shocks is one of the candidates to improve real-business-cycle model. Although the business cycle moments still cannot exactly match the real data, there are the signs of improvement in the model from employing the news shocks within the aspect of emerging-market economy. The impulse response function exhibits in line with real data. It can explain the business cycle during crisis with search and matching friction.