Hydrodynamic cavitaion venturi tube technique is used for pico and nano bubble generations in coal column flotation. In order to determine the optimal design of hydrodynamic cavitation venture tube for pico and nano b...Hydrodynamic cavitaion venturi tube technique is used for pico and nano bubble generations in coal column flotation. In order to determine the optimal design of hydrodynamic cavitation venture tube for pico and nano bubble generation, a four-factor three-level Central Composite Design of Experimental was conducted for investigating four important design parameters of cavitation venturi tube governing the median size and the volume of pico and nano bubbles. The test results showed that maximum volume of pico and nano bubbles, 65–75%, and minimum mean pico and nano bubble size,150–240 nm, were achieved at the medium ratio of the diameter of outlet of the venturi-tube and diameter of throat(3–4), medium outlet angle(11–13°), high inlet angle(26–27°) and high ratio of the length of the throat and the diameter of throat(2.3–3). Study the effects of the producing pico and nano bubbles on fine coal flotation was performed in a 5 cm diameter 260 cm height flotation column. The optimal percentage of pico and nano bubbles was about 70%, which produced maximum combustible material recovery of 86% with clean coal ash content of 11.7%.展开更多
This paper is divided into three subjects： Japanese Genghis Khan, Chinese tofu and Korean bibimbap （mixed rice with vegetables）. It will be a cross-cultural and comparative research on historic foods among three co...This paper is divided into three subjects： Japanese Genghis Khan, Chinese tofu and Korean bibimbap （mixed rice with vegetables）. It will be a cross-cultural and comparative research on historic foods among three countries （Japan, China, and Korea）, in relation to national culinary identity.展开更多
Henry James is one of the greatest novelists, who enjoys great reputation in the English literary world. He spent many years in Europe. Fie had deep and subtle insights into the life of the upper class in America and ...Henry James is one of the greatest novelists, who enjoys great reputation in the English literary world. He spent many years in Europe. Fie had deep and subtle insights into the life of the upper class in America and Europe. He experienced the cultural differences between America and Europe profoundly, which was demonstrated in his literary works. Daisy Miller is one of the representative works of Henry James, reveals his ＂international theme＂, the American innocence in face of European sophistication, In D^dsy Miller, Winterbourne is an undeniable protagonist, embodies both narrative and symbolic meaning. Through his narration and his representative features of the sophistication of European culture, we can gradually realize that it is the inevitable collision between new world and old world that leads to the pathetic ending of Daisy Miller.展开更多
The ＂Pictorial＂ or ＂Iconic Turn＂ is a central issue in the contemporary theory of images and visual cultural studies. Should the theories concerning the ＂Iconic Turn＂ and formulated in the last 20 years by schol...The ＂Pictorial＂ or ＂Iconic Turn＂ is a central issue in the contemporary theory of images and visual cultural studies. Should the theories concerning the ＂Iconic Turn＂ and formulated in the last 20 years by scholars such as Gottfried Boehm, William Mitchell, Hans Belting be taken as critical theories of crisis？ Is the currently experienced ＂turn towards images＂ （and their progressive rehabilitation after a long standing philosophical and theological rejection） a sign and symptom of some crisis of people＇s relation with images, language and, generally speaking, with the representation forms of reality？ The main hypothesis of this essay envisages two sets of problems： first, the analysis of the relation between the possible idea of turning point and the concept of crisis; secondly, the thorough investigation of the relation connecting the iconic turn to the project of ＂critical iconology＂ or ＂critique of visual culture,＂ as outlined by Hans Belting and William Mitchell. From the interpretation of the ＂Iconic Turn＂ as situation of crisis and aesthetic, anthropological, and epistemological transformation follows the need for the sciences of image to provide a ＂critical iconology＂ in order to be able to theoretically reformulate the ideological and political presuppositions of some dominant contemporary forms of visual representation.展开更多
The aim of this paper is to examine the developmental stages of rice culture in Korea. It is divided into five sections： （1） first stage （Japanese colonial period-1959）： absolute food insufficiency, （2） second...The aim of this paper is to examine the developmental stages of rice culture in Korea. It is divided into five sections： （1） first stage （Japanese colonial period-1959）： absolute food insufficiency, （2） second stage （1960s）： encouraging the use of flour ＆ rice with mixed grains for food, （3） third stage （1970s）： rice self-sufficiency, （4） fourth stage （1980s）： change of rice culture, （5） fitch stage （since1990s）： stabilization/stagnation of rice culture in the era of globalization.展开更多
Microalgae have been evaluated as a source of lipids for biodiesel production. They can be grown on effluent and produce biomass while removing organic and mineral components from the medium. The use of agro-industria...Microalgae have been evaluated as a source of lipids for biodiesel production. They can be grown on effluent and produce biomass while removing organic and mineral components from the medium. The use of agro-industrial wastes for the production of microalgae is an alternative to reduce the costs related to the composition of the culture medium, thus reducing operational costs considerably. This work was conceived as a research about the cultivation of microalgae Scenedesmus acuminatus on the substrate composed by corn steep liquor. A central composite design （CCD） was carried to study the influence of the effluent and inoculum concentration on the chemical oxygen demand （COD） of the culture. Statistical analysis indicated that the percentage of inoculum and effluent had an influence on the COD. The cultivation, together with the coagulation procedure, was efficient for the removal of organic matter, verified through the COD reduction and changing of pH value. These two parameters reached the appropriate level according to the standard required by current legislation.展开更多
The study, conducted in the Canton Erd6-Pala Chad, aims to i） list the different cultural practices, ii） study their impact on the vegetation and iii） determine the methods of co-management of these cultural practi...The study, conducted in the Canton Erd6-Pala Chad, aims to i） list the different cultural practices, ii） study their impact on the vegetation and iii） determine the methods of co-management of these cultural practices. The surveys were realized on 50 households in the village and phytosociological plants in corn, millet, cotton and peanuts cultures. The data analysis by statgraphic and Excel and Principal Component Analysis （PCA） showed that maize production （1,200 kg/ha） ranked first at the expense of cotton （640 kg/ha）. They negatively affect climate change （temperature increase （26%）, rain drop （20%）, land reclamation （18%） and flooding （12%））. Surveys of vegetation on three acres cotton fields （76.17%）, millet （81.06%）, corn （80.32%） and groundnut （83.56%） showed that there is no significant difference （P = 0.05） on the specific contribution of wood of different types of farming practices. Adventists species herbacious like Thelepogon elegans （27.84%）, Hyptis spicigera （19.31%）, Teramnus labialis （15.86%） have most important contributions in specific cultures. Methods of crop treatments have a destructive impact on the environment and the loss of biodiversity and the invasion of crops by adventists. Co-management, crop rotation, association of cultures, community forest management, agroforestry and training farmers in the use of inputs will reduce the potential risks of farming practices.展开更多
基金West Virginia State Coal and Energy Research Bureau(WVCERB)the Department of Mining Engineering,West Virginia University
文摘Hydrodynamic cavitaion venturi tube technique is used for pico and nano bubble generations in coal column flotation. In order to determine the optimal design of hydrodynamic cavitation venture tube for pico and nano bubble generation, a four-factor three-level Central Composite Design of Experimental was conducted for investigating four important design parameters of cavitation venturi tube governing the median size and the volume of pico and nano bubbles. The test results showed that maximum volume of pico and nano bubbles, 65–75%, and minimum mean pico and nano bubble size,150–240 nm, were achieved at the medium ratio of the diameter of outlet of the venturi-tube and diameter of throat(3–4), medium outlet angle(11–13°), high inlet angle(26–27°) and high ratio of the length of the throat and the diameter of throat(2.3–3). Study the effects of the producing pico and nano bubbles on fine coal flotation was performed in a 5 cm diameter 260 cm height flotation column. The optimal percentage of pico and nano bubbles was about 70%, which produced maximum combustible material recovery of 86% with clean coal ash content of 11.7%.
文摘This paper is divided into three subjects： Japanese Genghis Khan, Chinese tofu and Korean bibimbap （mixed rice with vegetables）. It will be a cross-cultural and comparative research on historic foods among three countries （Japan, China, and Korea）, in relation to national culinary identity.
文摘Henry James is one of the greatest novelists, who enjoys great reputation in the English literary world. He spent many years in Europe. Fie had deep and subtle insights into the life of the upper class in America and Europe. He experienced the cultural differences between America and Europe profoundly, which was demonstrated in his literary works. Daisy Miller is one of the representative works of Henry James, reveals his ＂international theme＂, the American innocence in face of European sophistication, In D^dsy Miller, Winterbourne is an undeniable protagonist, embodies both narrative and symbolic meaning. Through his narration and his representative features of the sophistication of European culture, we can gradually realize that it is the inevitable collision between new world and old world that leads to the pathetic ending of Daisy Miller.
文摘The ＂Pictorial＂ or ＂Iconic Turn＂ is a central issue in the contemporary theory of images and visual cultural studies. Should the theories concerning the ＂Iconic Turn＂ and formulated in the last 20 years by scholars such as Gottfried Boehm, William Mitchell, Hans Belting be taken as critical theories of crisis？ Is the currently experienced ＂turn towards images＂ （and their progressive rehabilitation after a long standing philosophical and theological rejection） a sign and symptom of some crisis of people＇s relation with images, language and, generally speaking, with the representation forms of reality？ The main hypothesis of this essay envisages two sets of problems： first, the analysis of the relation between the possible idea of turning point and the concept of crisis; secondly, the thorough investigation of the relation connecting the iconic turn to the project of ＂critical iconology＂ or ＂critique of visual culture,＂ as outlined by Hans Belting and William Mitchell. From the interpretation of the ＂Iconic Turn＂ as situation of crisis and aesthetic, anthropological, and epistemological transformation follows the need for the sciences of image to provide a ＂critical iconology＂ in order to be able to theoretically reformulate the ideological and political presuppositions of some dominant contemporary forms of visual representation.
文摘The aim of this paper is to examine the developmental stages of rice culture in Korea. It is divided into five sections： （1） first stage （Japanese colonial period-1959）： absolute food insufficiency, （2） second stage （1960s）： encouraging the use of flour ＆ rice with mixed grains for food, （3） third stage （1970s）： rice self-sufficiency, （4） fourth stage （1980s）： change of rice culture, （5） fitch stage （since1990s）： stabilization/stagnation of rice culture in the era of globalization.
文摘Microalgae have been evaluated as a source of lipids for biodiesel production. They can be grown on effluent and produce biomass while removing organic and mineral components from the medium. The use of agro-industrial wastes for the production of microalgae is an alternative to reduce the costs related to the composition of the culture medium, thus reducing operational costs considerably. This work was conceived as a research about the cultivation of microalgae Scenedesmus acuminatus on the substrate composed by corn steep liquor. A central composite design （CCD） was carried to study the influence of the effluent and inoculum concentration on the chemical oxygen demand （COD） of the culture. Statistical analysis indicated that the percentage of inoculum and effluent had an influence on the COD. The cultivation, together with the coagulation procedure, was efficient for the removal of organic matter, verified through the COD reduction and changing of pH value. These two parameters reached the appropriate level according to the standard required by current legislation.
文摘The study, conducted in the Canton Erd6-Pala Chad, aims to i） list the different cultural practices, ii） study their impact on the vegetation and iii） determine the methods of co-management of these cultural practices. The surveys were realized on 50 households in the village and phytosociological plants in corn, millet, cotton and peanuts cultures. The data analysis by statgraphic and Excel and Principal Component Analysis （PCA） showed that maize production （1,200 kg/ha） ranked first at the expense of cotton （640 kg/ha）. They negatively affect climate change （temperature increase （26%）, rain drop （20%）, land reclamation （18%） and flooding （12%））. Surveys of vegetation on three acres cotton fields （76.17%）, millet （81.06%）, corn （80.32%） and groundnut （83.56%） showed that there is no significant difference （P = 0.05） on the specific contribution of wood of different types of farming practices. Adventists species herbacious like Thelepogon elegans （27.84%）, Hyptis spicigera （19.31%）, Teramnus labialis （15.86%） have most important contributions in specific cultures. Methods of crop treatments have a destructive impact on the environment and the loss of biodiversity and the invasion of crops by adventists. Co-management, crop rotation, association of cultures, community forest management, agroforestry and training farmers in the use of inputs will reduce the potential risks of farming practices.
