The feasibility of GPS precipitable water vapor （PWV） is discussed based on the comparison of Radiosonde and GPS PWV where the correlation coefficient is 0.94 and the RMS is 4.0 mm. PWV change in the Chinese mainlan...The feasibility of GPS precipitable water vapor （PWV） is discussed based on the comparison of Radiosonde and GPS PWV where the correlation coefficient is 0.94 and the RMS is 4.0 mm. PWV change in the Chinese mainland in 2004 is graphed with the gridding method of splines in tension, according to the GPS data of the crust monitor observation network in China, combined with relevant meteorology information. According to the distribution of the annual amount of rainfall in the country, it can be concluded that the total trend of the PWV is diminishing from the south-east coastland to the north-west inland. The PWV reaches its maximum during July and August, and the minimum is reached during January and February. According to the PWV, from high to low, all districts can be ranked as south-east coastland, the inland and the tableland.展开更多
Recently, the development of endoscopic procedures has increased the availability of minimally invasive treatments; however, there have been few case reports of duodenal hemangioma treated by endoscopic mucosal resect...Recently, the development of endoscopic procedures has increased the availability of minimally invasive treatments; however, there have been few case reports of duodenal hemangioma treated by endoscopic mucosal resection. The present report describes a case of duodenal hemangioma that showed various endoscopic changes over time and was treated by endoscopic mucosal resection. An 80-year-old woman presented with tarry stools and a loss of appetite. An examination of her blood revealed severe anemia, and her hemoglobin level was 4.2 g/dL. An emergency upper gastrointestinal endoscopy was performed. A red, protrusive, semipedunculated tumor (approximately 20 mm in diameter) with spontaneous bleeding on its surface was found in the superior duodenal angle. Given the semipedunculated appearance of the tumor, it was suspected to be an epithelial tumor with a differential diagnosis of hyperplastic polyp. The biopsy results suggested a telangiectatic hemangioma. Because this lesion was considered to be responsible for her anemia, endoscopic mucosal resection was performed for diagnostic and treatment purposes after informed consent was obtained. A histopathological examination of the resected specimen revealed dilated and proliferated capillary lumens of various sizes, which confirmed the final diagnosis of duodenal hemangioma. Neither anemia nor tumor recurrence has been observed since the endoscopic mucosal resection (approximately 1 year). Duodenal hemangiomas can be treated endoscopically provided that sufficient consideration is given to all of the possible treatment strategies. Interestingly, duodenal hemangiomas show morphological changes that are influenced by various factors, such as mechanical stimuli.展开更多
There are five changes in higher education across the world in the 21st century. The five changes include changes in the university students, changes in the professoriate, changes in academic administration, intematio...There are five changes in higher education across the world in the 21st century. The five changes include changes in the university students, changes in the professoriate, changes in academic administration, intemationalisation, and assessment of academic work. These changes are evident in higher education in China. The pressure of the changes -on lecturers will have effects on the wellbeing of lecturers. The study discusses the wellbeing under the Self-determination Theory. This theory views wellbeing as a state of happiness. This theory also proposes that people＇s intrinsic goals like personal growth, meaningful relationships, and community contributions can enhance the satisfaction of three basic needs--need for autonomy, need for competence, and need for relatedness. In this way, lecturers can experience a sense of wellbeing. The findings of the study are significant for leaders in higher education who need to implement policies that foster effective work environments.展开更多
Background:Marginal changes in the execution of competitive sports movements can represent a significant change for performance success.However,such differences may emerge only at certain execution intensities and are...Background:Marginal changes in the execution of competitive sports movements can represent a significant change for performance success.However,such differences may emerge only at certain execution intensities and are not easily detectable through conventional biomechanical techniques.This study aimed to investigate if and how competition standard and progression speed affect race walking kinematics from both a conventional and a coordination variability perspective.Methods:Fifteen experienced athletes divided into three groups(elite,international,and national) were studied while race walking on a treadmill at two different speeds(12.0 and 15.5 km/h).Basic gait parameters,the angular displacement of the pelvis and lower limbs,and the variability in continuous relative phase between six different joint couplings were analyzed.Results:Most of the spatio-temporal,kinematic,and coordination variability measures proved sensitive to the change in speed.Conversely,non-linear dynamics measures highlighted differences between athletes of different competition standard when conventional analytical tools were not able to discriminate between different skill levels.Continuous relative phase variability was higher for national level athletes than international and elite in two couplings(pelvis obliquity—hip flex/extension and pelvis rotation—ankle dorsi/plantarflexion) and gait phases(early stance for the first coupling,propulsive phase for the second) that are deemed fundamental for correct technique and performance.Conclusion:Measures of coordination variability showed to be a more sensitive tool for the fine detection of skill-dependent factors in competitive race walking,and showed good potential for being integrated in the assessment and monitoring of sports motor abilities.展开更多
We present a general formalism for setting up unitary transform operators from classical transforms via the technique of integration within an ordered product of operators, their normally ordered form can be obtained ...We present a general formalism for setting up unitary transform operators from classical transforms via the technique of integration within an ordered product of operators, their normally ordered form can be obtained too.展开更多
This paper details the prospects for a civil nuclear power station in Estonia. Due to its climate change commitments, Estonia needs a new source of electricity provision. There is little academic literature on Estonia...This paper details the prospects for a civil nuclear power station in Estonia. Due to its climate change commitments, Estonia needs a new source of electricity provision. There is little academic literature on Estonia, and this research builds upon previous work but is more detailed in its analysis with primary data included in the form of interviews with Estonian energy industry experts. All the conditions that have led to nuclear energy being considered as an option are assessed, along with why it represents the most strategic path for Estonia in terms of electricity provision. Through the interview analysis a framework is established and advanced for the successful initiation of a national nuclear power plant project. This research is therefore of high value for small EU countries who intend to consider nuclear energy as an option in their energy mix or have more advanced plans to develop a nuclear program.展开更多
In many ways, digital practices have precipitated remarkable changes in the global accessibility of art. However, the digital revolution has also radically influenced the conservation processes surrounding art, includ...In many ways, digital practices have precipitated remarkable changes in the global accessibility of art. However, the digital revolution has also radically influenced the conservation processes surrounding art, including archiving, preserving, and remembering. This paper explores the conservation of digital （or ＂variable media＂） artworks for the future benefit of culture, with particular reference to creators and viewers of art, as well as participants in interactive artworks. More specifically, this paper focuses on the philosophical and technical approaches adopted by creators, conservators, and philosophers involved in the preservation of variable media artworks. Issues of programming, interoperability between archival systems, and enhanced public access increasingly inform the design of digital archives. Indeed, the continuously shifting technological landscape-marked by the centrality of digital technologies to everyday life-problematizes the preservation of digital art through mainstream museological paradigms. Part of this analysis of digital art conservation will be drawn from the archival philosophies of Boris Groys and Rick Prelinger.展开更多
Objective To evaluate the significance of multidetector CT 3D reconstruction technique inshowing anatomy of ethmoid sinus, at the same time, anatomic variations of ethmoid sinus and its clinical significance were also...Objective To evaluate the significance of multidetector CT 3D reconstruction technique inshowing anatomy of ethmoid sinus, at the same time, anatomic variations of ethmoid sinus and its clinical significance were also discussed. Methods 250 cases of ethmoid sinuses were scanned transversally by multidetector scaner, coronal and sagittal views were reconstructed. Results Coronal and sagittal views were good enough to make diagnosis. 5 kinds of common ethmoid sinus variations were seen, including pneumatization of ethmoid bulla (56. 5% ) , Onodi air cell(26% ) , Haller cell(6. 5% ) ,low ethmoid foveolas(4. 3% )and over intromigratiny lamella papyracea (6. 5% ). Conclusion The coronal and other special views of ethmoid sinus are showed clearly by 3D reconstruction which can provide detailed image informations for functional endoscopic sinus surgery.展开更多
文摘The feasibility of GPS precipitable water vapor （PWV） is discussed based on the comparison of Radiosonde and GPS PWV where the correlation coefficient is 0.94 and the RMS is 4.0 mm. PWV change in the Chinese mainland in 2004 is graphed with the gridding method of splines in tension, according to the GPS data of the crust monitor observation network in China, combined with relevant meteorology information. According to the distribution of the annual amount of rainfall in the country, it can be concluded that the total trend of the PWV is diminishing from the south-east coastland to the north-west inland. The PWV reaches its maximum during July and August, and the minimum is reached during January and February. According to the PWV, from high to low, all districts can be ranked as south-east coastland, the inland and the tableland.
文摘Recently, the development of endoscopic procedures has increased the availability of minimally invasive treatments; however, there have been few case reports of duodenal hemangioma treated by endoscopic mucosal resection. The present report describes a case of duodenal hemangioma that showed various endoscopic changes over time and was treated by endoscopic mucosal resection. An 80-year-old woman presented with tarry stools and a loss of appetite. An examination of her blood revealed severe anemia, and her hemoglobin level was 4.2 g/dL. An emergency upper gastrointestinal endoscopy was performed. A red, protrusive, semipedunculated tumor (approximately 20 mm in diameter) with spontaneous bleeding on its surface was found in the superior duodenal angle. Given the semipedunculated appearance of the tumor, it was suspected to be an epithelial tumor with a differential diagnosis of hyperplastic polyp. The biopsy results suggested a telangiectatic hemangioma. Because this lesion was considered to be responsible for her anemia, endoscopic mucosal resection was performed for diagnostic and treatment purposes after informed consent was obtained. A histopathological examination of the resected specimen revealed dilated and proliferated capillary lumens of various sizes, which confirmed the final diagnosis of duodenal hemangioma. Neither anemia nor tumor recurrence has been observed since the endoscopic mucosal resection (approximately 1 year). Duodenal hemangiomas can be treated endoscopically provided that sufficient consideration is given to all of the possible treatment strategies. Interestingly, duodenal hemangiomas show morphological changes that are influenced by various factors, such as mechanical stimuli.
文摘There are five changes in higher education across the world in the 21st century. The five changes include changes in the university students, changes in the professoriate, changes in academic administration, intemationalisation, and assessment of academic work. These changes are evident in higher education in China. The pressure of the changes -on lecturers will have effects on the wellbeing of lecturers. The study discusses the wellbeing under the Self-determination Theory. This theory views wellbeing as a state of happiness. This theory also proposes that people＇s intrinsic goals like personal growth, meaningful relationships, and community contributions can enhance the satisfaction of three basic needs--need for autonomy, need for competence, and need for relatedness. In this way, lecturers can experience a sense of wellbeing. The findings of the study are significant for leaders in higher education who need to implement policies that foster effective work environments.
文摘Background:Marginal changes in the execution of competitive sports movements can represent a significant change for performance success.However,such differences may emerge only at certain execution intensities and are not easily detectable through conventional biomechanical techniques.This study aimed to investigate if and how competition standard and progression speed affect race walking kinematics from both a conventional and a coordination variability perspective.Methods:Fifteen experienced athletes divided into three groups(elite,international,and national) were studied while race walking on a treadmill at two different speeds(12.0 and 15.5 km/h).Basic gait parameters,the angular displacement of the pelvis and lower limbs,and the variability in continuous relative phase between six different joint couplings were analyzed.Results:Most of the spatio-temporal,kinematic,and coordination variability measures proved sensitive to the change in speed.Conversely,non-linear dynamics measures highlighted differences between athletes of different competition standard when conventional analytical tools were not able to discriminate between different skill levels.Continuous relative phase variability was higher for national level athletes than international and elite in two couplings(pelvis obliquity—hip flex/extension and pelvis rotation—ankle dorsi/plantarflexion) and gait phases(early stance for the first coupling,propulsive phase for the second) that are deemed fundamental for correct technique and performance.Conclusion:Measures of coordination variability showed to be a more sensitive tool for the fine detection of skill-dependent factors in competitive race walking,and showed good potential for being integrated in the assessment and monitoring of sports motor abilities.
基金The project supported by National Natural Science Foundation of China under Grant No. 10475056
文摘We present a general formalism for setting up unitary transform operators from classical transforms via the technique of integration within an ordered product of operators, their normally ordered form can be obtained too.
文摘This paper details the prospects for a civil nuclear power station in Estonia. Due to its climate change commitments, Estonia needs a new source of electricity provision. There is little academic literature on Estonia, and this research builds upon previous work but is more detailed in its analysis with primary data included in the form of interviews with Estonian energy industry experts. All the conditions that have led to nuclear energy being considered as an option are assessed, along with why it represents the most strategic path for Estonia in terms of electricity provision. Through the interview analysis a framework is established and advanced for the successful initiation of a national nuclear power plant project. This research is therefore of high value for small EU countries who intend to consider nuclear energy as an option in their energy mix or have more advanced plans to develop a nuclear program.
文摘In many ways, digital practices have precipitated remarkable changes in the global accessibility of art. However, the digital revolution has also radically influenced the conservation processes surrounding art, including archiving, preserving, and remembering. This paper explores the conservation of digital （or ＂variable media＂） artworks for the future benefit of culture, with particular reference to creators and viewers of art, as well as participants in interactive artworks. More specifically, this paper focuses on the philosophical and technical approaches adopted by creators, conservators, and philosophers involved in the preservation of variable media artworks. Issues of programming, interoperability between archival systems, and enhanced public access increasingly inform the design of digital archives. Indeed, the continuously shifting technological landscape-marked by the centrality of digital technologies to everyday life-problematizes the preservation of digital art through mainstream museological paradigms. Part of this analysis of digital art conservation will be drawn from the archival philosophies of Boris Groys and Rick Prelinger.
文摘Objective To evaluate the significance of multidetector CT 3D reconstruction technique inshowing anatomy of ethmoid sinus, at the same time, anatomic variations of ethmoid sinus and its clinical significance were also discussed. Methods 250 cases of ethmoid sinuses were scanned transversally by multidetector scaner, coronal and sagittal views were reconstructed. Results Coronal and sagittal views were good enough to make diagnosis. 5 kinds of common ethmoid sinus variations were seen, including pneumatization of ethmoid bulla (56. 5% ) , Onodi air cell(26% ) , Haller cell(6. 5% ) ,low ethmoid foveolas(4. 3% )and over intromigratiny lamella papyracea (6. 5% ). Conclusion The coronal and other special views of ethmoid sinus are showed clearly by 3D reconstruction which can provide detailed image informations for functional endoscopic sinus surgery.
