Study on cultural-science & technology innovation with the perspective of social constructionism 并列题名：Study on cultural-science & technology innovation with the perspective of social constructionism A study of arab-israeli relations from the perspective of power constructivism Study on food science and technology policy from the perspective of food and nutrition security Study on Nairn's nationalism theory with the perspective of historical materialism 并列题名：Study on food science and technology policy from the perspective of food and nutrition security