After the Second World War of the past century in Italy extended plantations were carried out. In Southern Italy the Calabrian pine （Pinus laricio Poiret） has been the most used species, for its ability to take root...After the Second World War of the past century in Italy extended plantations were carried out. In Southern Italy the Calabrian pine （Pinus laricio Poiret） has been the most used species, for its ability to take root in many difficult conditions. Currently the extension of this vegetation is about 36,000 hectares, in great part established in Calabria. They have reduced hydrogeological risks, they have carried out an important social role and have improved the landscape and the environment of huge hill and mountain territories. After the realization of these stands, no forest management has been made in order to define purposes and silvicultural operations. All stands are currently vulnerable in order to abiotic （fire, breakages） and biotic （Traumatocampa （--- Thaumetopoea） pityocampa （Denis ＆ Schiff.） and Heterobasidion annosum （Fr.） Bref.） agents. For the future, the silvicultural management of these stands will not be able to avoid planning choices, in order to improve the structural stability and the bioecological functionality and to consider the recent opportunities offered from the agroenergetic field.展开更多
Posters are an usual means of wartime disseminating psychological warfare. In World War I and World War II and even the cold war period, it obtained a good performance, so its importance is self-evident. However, with...Posters are an usual means of wartime disseminating psychological warfare. In World War I and World War II and even the cold war period, it obtained a good performance, so its importance is self-evident. However, with the high-end development of modern science and technology, Intemet transmission replace and people＇ s self-cognition awakening, the psychological warfare dissemination means of simply by posters to expand influence has become obsolete, but it doesn＇ t mean that we don＇ t need these means. Most of the time, in such a complex social environment and interpersonal environment, the most original and most straightforward method is the most likely weapon to move people＇ s thought. This paper reviews the posters in World War I, World War II and cold war period in disseminating psychological warfare success to illustrate the importance of this means in wartime psychological warfare dissemination process. At the same time, it analyzes the feature of modern dissemination psychological warfare, mining new communication means with traditional publicity method and re-constructing the function application of posters in dissemination psychological warfare and other business expanding.展开更多
It is proved that for a left Nootherian z-graded ring A, if every finitely generated gradedA-module has finite projective dimension (i.e., A is gr-regular) then every finitely generatedA-module has finite projective d...It is proved that for a left Nootherian z-graded ring A, if every finitely generated gradedA-module has finite projective dimension (i.e., A is gr-regular) then every finitely generatedA-module has finite projective dimension (i.e., A is regular). Some applications of this resultto filtered rings and some classical cases are also given.展开更多
文摘After the Second World War of the past century in Italy extended plantations were carried out. In Southern Italy the Calabrian pine （Pinus laricio Poiret） has been the most used species, for its ability to take root in many difficult conditions. Currently the extension of this vegetation is about 36,000 hectares, in great part established in Calabria. They have reduced hydrogeological risks, they have carried out an important social role and have improved the landscape and the environment of huge hill and mountain territories. After the realization of these stands, no forest management has been made in order to define purposes and silvicultural operations. All stands are currently vulnerable in order to abiotic （fire, breakages） and biotic （Traumatocampa （--- Thaumetopoea） pityocampa （Denis ＆ Schiff.） and Heterobasidion annosum （Fr.） Bref.） agents. For the future, the silvicultural management of these stands will not be able to avoid planning choices, in order to improve the structural stability and the bioecological functionality and to consider the recent opportunities offered from the agroenergetic field.
文摘Posters are an usual means of wartime disseminating psychological warfare. In World War I and World War II and even the cold war period, it obtained a good performance, so its importance is self-evident. However, with the high-end development of modern science and technology, Intemet transmission replace and people＇ s self-cognition awakening, the psychological warfare dissemination means of simply by posters to expand influence has become obsolete, but it doesn＇ t mean that we don＇ t need these means. Most of the time, in such a complex social environment and interpersonal environment, the most original and most straightforward method is the most likely weapon to move people＇ s thought. This paper reviews the posters in World War I, World War II and cold war period in disseminating psychological warfare success to illustrate the importance of this means in wartime psychological warfare dissemination process. At the same time, it analyzes the feature of modern dissemination psychological warfare, mining new communication means with traditional publicity method and re-constructing the function application of posters in dissemination psychological warfare and other business expanding.
文摘It is proved that for a left Nootherian z-graded ring A, if every finitely generated gradedA-module has finite projective dimension (i.e., A is gr-regular) then every finitely generatedA-module has finite projective dimension (i.e., A is regular). Some applications of this resultto filtered rings and some classical cases are also given.
