Jong-woo Choi

In this paper, a novel dead time compensation method is presented which produces inverter output voltages equal to reference voltages. The experimental result is also presented to demonstrate the validity of the proposed method. It shows that the compensation of the distorted voltage is possible up to sub-microsecond range. The reference voltage can be used as a feedback value, which is essential for sensorless vector control and flux estimation. The method is based on space vector PWM strategy

Purpose The purpose of this paper is to examine the effect of extrinsic cues on wine consumer’s willingness to pay (WTP) based on a blind tasting experiment conducted in Hong Kong. Design/methodology/approach Using data from a three-stage blind wine tasting experiment, the authors examine how an average consumer’s WTP for a bottle of wine changes as a result of knowing prior to tasting extrinsic information such as the country of origin or grape variety of an otherwise identical product. Finding

Countries have become increasingly concerned about the safety of their food. Many countries have imposed standards on both domestically produced and imported food. In particular, countries have implemented regulations to control the quantity and quality of vegetable imports. Maximum Residue Limit (MRL) standards are one of the main restrictions adopted by numerous countries. Japan has one of the strictest MRL standards in the world. This study builds on previous studies to explore the impact of

Purpose Development of new cultivars requires extensive genetic knowledge, trained personnel, and significant financial resources, so it is crucial for breeders to focus on the attributes most preferred by the key supply chain stakeholders such as consumers and producers. The purpose of this paper is to identify which attributes generate the highest total revenue or social surplus, information that breeders can take into account as they allocate resources to focus on attributes in their breeding

We conducted choice experiments with both strawberry producers and consumers. Consumer and producer willingness to pay (WTP) for the fruit attributes were estimated using mixed logit models. Through simulation using the mixed logit model results, we derived the market equilibrium prices, supply and demand curve, as well as quantities demanded and supplied for every fruit attribute. We found the highest equilibrium price was for strawberry internal color followed by flavor. Strawberry breeders ca

Purpose: Coupang's profitability ratio has historically been low. However, both Coupang's sales and profitability started to improve in 2022. This paper aims to discuss Coupang’s strategy for turning itself into a profitable business. Research design, data and methodology: Coupang is the company with the largest sales among the various domestic early-morning delivery companies and the only company with a surplus. It's shift into profitability will definitely have a big ripple effect on the early

The difference in the degree to which consumers accept a new culture depends on a variety of factors that affect each consumer. In order to grasp the acceptance of new food, it is necessary to consider both internal and external influence factors on food acceptance. The experiment was carried out three times with imported potato chips and domestic potato chips that can be easily accessed. Then, we investigated marketing strategies by using the “choice experiment” analysis methodology to identify

This study aims to investigate how consumption situations, consumer characteristics and food pairing patterns differ based on milk selection, namely cow milk and plant-based drink, using food diary data (117,728 cases). The consumer characteristics and drinking situations of milk and plant-based drink were analyzed using probit model, and food pairing patterns of milk and plant-based drink were analyzed using decision tree analysis. Plant-based drink consumers are more likely to be older, female

Smart farms use advanced technologies to grow crops indoors without soil, offering environmental benefits such as reduced transportation distances and lower water consumption. However, consumers who prefer local food may resist these products. This study examines this ‘local food paradox’ among South Korean consumers. We surveyed 1,247 consumers and used latent class analysis to identify distinct consumer groups based on their technology acceptance, resistance to food technology, and local food

This dataset contains regional panel data for Uzbekistan covering the period 2020–2023. The data were used to estimate technical efficiency of irrigation systems using Data Envelopment Analysis (DEA) and second-stage regression analysis. The dataset includes variables related to irrigation water use, land (proxied by land tax), labor, agricultural outputs (cotton and wheat), and climatic conditions (precipitation and temperature). Data sources include national statistical agencies.

Smart farms use advanced technologies to grow crops indoors without soil, offering environmental benefits such as reduced transportation distances and lower water consumption. However, consumers who prefer local food may resist these products. This study examines this ‘local food paradox’ among South Korean consumers. We surveyed 1,247 consumers and used latent class analysis to identify distinct consumer groups based on their technology acceptance, resistance to food technology, and local food

This study investigates the impact of regional innovation initiatives on economic development in South Korea. Through a comprehensive analysis, the study demonstrates a compelling relationship between regional innovation efforts and positive economic outcomes. Key findings reveal that regional innovation activities led to significant improvements in the region's economic prowess, as evidenced by increased GRDP, investment levels, and average monthly wages. Research and development (R&D) expe

The purpose of this study is to investigate the efficiency of smart farm facilities of insect business entities. A questionnaire was conducted to investigate the actual conditions of smart farm edible insect business entities. A survey of 500 edible insect farms, all of which raised insects within 7 years of establishment, was conducted, and all of them raised insects in smart farm facilities. First, after dividing the smart farm into three levels, efficiency was measured. In particular, efficie

Since 2020, online sales of agri-food products have increased significantly, with public shopping malls showing notable differences in performance depending on the administrative and operational capabilities of local governments. This study aims to derive practical and policy implications by analyzing the case of Gyeongsangbuk-do’s ‘Saiso,’ a local government-run agricultural platform that has demonstrated stable and continuous growth. The research identifies three major strategies that contribu