Land consolidation has a profound impact on landscape patterns and ecological functions at various scales through engineering and biological measures. In recent years, China invests more than 100 billion RMB yuan on l...Land consolidation has a profound impact on landscape patterns and ecological functions at various scales through engineering and biological measures. In recent years, China invests more than 100 billion RMB yuan on land consolidation each year. To under- stand how land consolidation affects landscape patterns and ecosystems, we investigated the ecosystem service value and the ecological connectivity in a consolidated area of Da＇an city from 2008 to 2014 using a revised ecological connectivity index. The results indicated that land consolidation has certain negative influences on the ecosystem services in this area. The total ecosystem service value will decrease by nearly 30% in the late stage of consolida- tion. This decrease is caused by the loss of ecosystem service of the wetland and grassland, despite a sensible increase of cultivated land. In addition, land consolidation could change the ecological connectivity as well as the land use structure. Up to 85% of the entire area will be in low connectivity in the late stage of consolidation, representing a 6.23% increase in the total coverage compared to pre-consolidation. Finally, the different connectivity landscape and their key areas can be identified by the revised ecological connectivity index effectively. This study is helpful to trace out the relationships between landscape pattern and ecological process, and provides insights for ecological planning and designing of land consolidation in this area. We suggest that more attentions should be paid to improve the quality and eco- system service value per unit area of the landscape, to establish ecological compensation mechanism of wetland losses, and to create the ecological corridors along the least accu- mulated impendence surface in the key areas during land consolidation.展开更多
Objective: Kanazawa University introduced the da Vinci surgical system and the Radius surgical system. In this study, we compared the advantages and disadvantages of each system. Methods: The da Vinci system is a mast...Objective: Kanazawa University introduced the da Vinci surgical system and the Radius surgical system. In this study, we compared the advantages and disadvantages of each system. Methods: The da Vinci system is a master-slave tele-manipulation system, which provides hi-resolution 3D images. The Radius system is pair of hand-guided surgical manipulators. In this study we focus on the operability of both instruments rather than their 3D optical systems. Results: The Radius was originally developed specifically focused on ligation and suturing with suture sizes bigger than 4-0, it is more effective, less expensive compared with the da Vinci. Although the da Vinci system is bulky, it allows surgeons to perform endoscopic surgeries only if ports are properly placed to prevent each arm from colliding with the other arms. A crucial difference between the Radius and the da Vinci is not limited to anastomose small vessels but is extended to multidirectional dissection. Currently, the cost including initial investment is the biggest issue;however, the da Vinci is absolutely necessary to implement delicate cardiac surgeries endoscopically and less-invasively. Early approval of robotic surgery by the government is urgently required in Japan. Conclusions: Although both the da Vinci and the Radius have endoscopic instruments with a multi-degree of freedom, applications need to be differentiated depending on the procedures and indications. Therefore, it can be clearly said that these unique innovative systems will never compete against each other.展开更多
A 59-year-old man with metastatic an esophageal tumor from hepatocellular carcinoma(HCC) presented with progressive dysphagia.He had undergone liver transplantation for HCC three and a half years prevously.At presenta...A 59-year-old man with metastatic an esophageal tumor from hepatocellular carcinoma(HCC) presented with progressive dysphagia.He had undergone liver transplantation for HCC three and a half years prevously.At presentation,his radiological and endoscopic examinations suggested a submucosal tumor in the lower esophagus,causing a luminal stricture.We performed complete resection of the esophageal metastases and esophagogastrostomy reconstruction using the da Vinci robotic system.Recovery was uneventful and he was been doing well 2 mo after surgery.α-fetoprotein level decreased from 510 ng/mL to 30 ng/mL postoperatively.During the follow-up period,he developed a recurrent esophageal stricture at the anastomosis site and this was successfully treated by endoscopic esophageal dilatation.展开更多
We investigated the effects of lipopolysaccharide （LPS） and dopamine （DA） on the activation of the prophenoloxidase （proPO） system of Litopenaeus vannamei. LPS and DA were shown with a negative dose-dependent ef...We investigated the effects of lipopolysaccharide （LPS） and dopamine （DA） on the activation of the prophenoloxidase （proPO） system of Litopenaeus vannamei. LPS and DA were shown with a negative dose-dependent effect on hyalne cells （HC）, semi-granular cells （SGC）, large granular cells （LGC）, and total haemocyte count （THC）. When haemocytes were treated with LPS or DA, serine proteinase activity and intracellular phenoloxidase （PO） activity were significantly reduced, but extracellular PO activity increased significantly. These findings indicated that the reduction in haemocyte counts was mainly because of the degranulation and activation of the proPO system from semi-granule and large granule cells. The PKC inhibitor, chelerythrine, and the TPK inhibitor, genistein, had an inhibitory effect on extracellular PO activity, while serine proteinase and intracellular PO activity increased. This suggests that the LPS and DA induce the activation of proPO in haemocytes via PKC and TPK-related signaling pathways, but serine proteinase may be activated only by PKC, as the genistein effects were not statistically significant. Electrophoresis analysis revealed that POs induced by LPS or DA have the same molecular mass and high diphenolase activity. Two PO bands at 526 kDa and 272 kDa were observed in PAGE, while in the haemocyte lysate supematant （HLS）, only a 272-kDa band was observed. This band was resolved after SDS-PAGE under non-reducing and reducing conditions into two groups of POs, 166 kDa and 126 kDa, and 78.1 kDa and 73.6 kDa, respectively, suggesting that PO in L. vannamei is an oligomer, which may have different compositions intra- and extracellularly.展开更多
Introduction:Robotic systems are designed to address the limitations of laparoscopic surgery,leading to a growing interest in robotic rectal surgery.However,certain technical limitations associated with the previous s...Introduction:Robotic systems are designed to address the limitations of laparoscopic surgery,leading to a growing interest in robotic rectal surgery.However,certain technical limitations associated with the previous systems(da Vinci S&Si)have arguably slowed down its wholesale adoption.The latest robotic platform,the da Vinci Xi,addresses these limitations.This study aims to examine the short-term surgical outcomes of 240 single-docking fully-robotic rectal cancer resections and compare the outcomes of cases performed with the da Vinci Xi vs Si systems.Materials and methods:All consecutive patients receiving robotic rectal cancer resections from three centres between 2013 and 2018 were identified from prospectively collated databases.The baseline characteristics and short-term surgical outcomes are presented and the da Vinci Xi vs Si system outcomes are analysed.Results:A total of 240 patients were identified(124 Si,116 Xi).Median operation-time and length-of-stay were 260 minutes and 6 days respectively.Conversion and 30-day mortality rates were 0.The da Vinci Si vs Xi system analysis shows that operation-time was lower in the Si group(230 vs 300 min,p=0.000)but length-of-stay,lymph node yield and circumferential resection margin favoured the Xi group(7 vs 5 days,p=0.010;17 vs 21,p=0.000;92.7%vs 99.1%,p=0.020).Conclusion:Single-docking fully-robotic rectal cancer surgery is safe,feasible and can lead to good shortterm outcomes,making it a good alternative to laparoscopic rectal cancer surgery.The new systems technological advances may result in better short-term outcomes but further larger scale observational studies are required if we are to reach such a conclusion.展开更多
This study examined regional differences in ecosystem services for the Da Hinggan Mountains(DHM),China.A correction index was constructed based on ten-year average net primary productivity(NPP)data.A new equivalent fa...This study examined regional differences in ecosystem services for the Da Hinggan Mountains(DHM),China.A correction index was constructed based on ten-year average net primary productivity(NPP)data.A new equivalent factor table that was suitable for the assessment of wetlands in the DHM was formed by using the expert weight determination method(EWDM).An evaluation model was established for evaluating the ecosystem service value(ESV)of wetlands in the DHM.The results show that in 2020,the total ESV of wetlands reached 93361×10^(6) USD,with the forest swamp and marsh ecosystems contributing the most.From the perspective of value composition,regulating services and supporting services are the main service functions of wetlands in the DHM.From 2010 to2020,ESV provided by wetlands increased by 4337×10^(6) USD/yr in the DHM.The value of forest swamp and peatland ecosystems increased by 18.6%and 12.7%,respectively,whereas the value of swamp,shrub swamp,and marsh decreased.The research results are of significance for contributing to local government performance evaluation and determining financial compensation for the provision of wetland ecosystem services.展开更多
The sensible and latent heat fluxes over the ocean area near China were calculated and analyzed by usingthe Goddard Earth Observing System (GEOS) - four-dimensional Data Assimilation System (DAS). The calculated resul...The sensible and latent heat fluxes over the ocean area near China were calculated and analyzed by usingthe Goddard Earth Observing System (GEOS) - four-dimensional Data Assimilation System (DAS). The calculated results showed that the sensible heat flux had its large value in winter and autumn , small value in spring and summer overthe ocean area near China. In winter, the sensible heat flux increased distinctly with latitude, and its isolines were verycrowded. Over the ocean area east of Taiwan Province and south of Japan, the direction of isoline was from southwestto northeast. In the South China Sea the sensible heat flux was lower than that of surrounding ocean areas,and its isoline was distributed into a type of an inverted trough. In autumn and winter, the maximum center of latent heat flux appeared over the ocean area northeast of Taiwan Province and south and southeast of Japan, meanwhile, the isoline wasin the direction of southwest to northeast. In spring and summer, the latent heat flux had minimum value in the Huanghai Sea. At the same time, the maximum value center of latent heat flux appeared over the ocean area south of Japan inspring.展开更多
Three synchrotron radiation beam lines have been built on DAΦNE,the Frascati electron-positron accelerator.It is Possible to monitor and control all the elements on the beam lines using a modular network distributed ...Three synchrotron radiation beam lines have been built on DAΦNE,the Frascati electron-positron accelerator.It is Possible to monitor and control all the elements on the beam lines using a modular network distributed I/O system by National Instrunments (FieldPoint) with Bridge VIEW/Lab VIEW programs,Two of these beam lines have radiation safety problems solved by two independent and redundant systems,using mechanical switches ,and S7-200 PLC's by Siemens.In this article our solution will be described in details.展开更多
Indoor positioning systems (IPSs) have been intended to provide position information of persons and devices. Higher user percentage of handheld devices such as tablets or mobile phones had led to the development of a ...Indoor positioning systems (IPSs) have been intended to provide position information of persons and devices. Higher user percentage of handheld devices such as tablets or mobile phones had led to the development of a number of indoor positioning systems. In this research a work on a real time portable RFID indoor positioning device such as on smartphone will be performed. The personal networks will be designed to meet the users’ needs and interconnect users’ devices equipped with different communications technologies in various places to form one network for better result. Radio frequency identification (RFID) with directional antenna has proved its potential for locating objects in indoor environment. Hence, the proposed device idea will be used to exploit various unknown locations in an indoor environment such as college campus;this interpretation will rely on Wireless LAN, Received Signal Strength values from Access Points (AP) in specific mentioned arenas;these APs will be monitored constantly by RFID with directional antenna (DA) and handheld devices. For obtaining the better results from existing devices, algorithms of Range Estimation are proposed, which can be used on various handheld devices for locating indoor objects.展开更多
The planning and treatment of wastewater discharged into rivers and seas is vital for tourism,domestic water supply,and other key sectors.This study used the MIKE 21 model to evaluate water quality trends and the assi...The planning and treatment of wastewater discharged into rivers and seas is vital for tourism,domestic water supply,and other key sectors.This study used the MIKE 21 model to evaluate water quality trends and the assimilative capacity of the Vu Gia River estuary and the major reservoirs in Da Nang,considering future pollution loads and climate change scenarios(RCP8.5).Key parameters assessed include DO,BOD_(5),COD,and Coliform.Results show a general decline in water quality(WQI)from 2019 to 2030 and again by 2070,with DO and BOD_(5)contributing most to pollution.While COD and Coliform remained within acceptable limits(WQI>75),the Phu Loc River had the lowest WQI(66.0–62.2).Other affected areas include the Han River(downstream and upstream)and the Cu De River.Reservoirs like Dong Nghe and Hoa Trung maintained better water quality(WQI>80),though a downward trend was still observed.展开更多
基金National Natural Science Foundation of China, No.41171152
文摘Land consolidation has a profound impact on landscape patterns and ecological functions at various scales through engineering and biological measures. In recent years, China invests more than 100 billion RMB yuan on land consolidation each year. To under- stand how land consolidation affects landscape patterns and ecosystems, we investigated the ecosystem service value and the ecological connectivity in a consolidated area of Da＇an city from 2008 to 2014 using a revised ecological connectivity index. The results indicated that land consolidation has certain negative influences on the ecosystem services in this area. The total ecosystem service value will decrease by nearly 30% in the late stage of consolida- tion. This decrease is caused by the loss of ecosystem service of the wetland and grassland, despite a sensible increase of cultivated land. In addition, land consolidation could change the ecological connectivity as well as the land use structure. Up to 85% of the entire area will be in low connectivity in the late stage of consolidation, representing a 6.23% increase in the total coverage compared to pre-consolidation. Finally, the different connectivity landscape and their key areas can be identified by the revised ecological connectivity index effectively. This study is helpful to trace out the relationships between landscape pattern and ecological process, and provides insights for ecological planning and designing of land consolidation in this area. We suggest that more attentions should be paid to improve the quality and eco- system service value per unit area of the landscape, to establish ecological compensation mechanism of wetland losses, and to create the ecological corridors along the least accu- mulated impendence surface in the key areas during land consolidation.
文摘Objective: Kanazawa University introduced the da Vinci surgical system and the Radius surgical system. In this study, we compared the advantages and disadvantages of each system. Methods: The da Vinci system is a master-slave tele-manipulation system, which provides hi-resolution 3D images. The Radius system is pair of hand-guided surgical manipulators. In this study we focus on the operability of both instruments rather than their 3D optical systems. Results: The Radius was originally developed specifically focused on ligation and suturing with suture sizes bigger than 4-0, it is more effective, less expensive compared with the da Vinci. Although the da Vinci system is bulky, it allows surgeons to perform endoscopic surgeries only if ports are properly placed to prevent each arm from colliding with the other arms. A crucial difference between the Radius and the da Vinci is not limited to anastomose small vessels but is extended to multidirectional dissection. Currently, the cost including initial investment is the biggest issue;however, the da Vinci is absolutely necessary to implement delicate cardiac surgeries endoscopically and less-invasively. Early approval of robotic surgery by the government is urgently required in Japan. Conclusions: Although both the da Vinci and the Radius have endoscopic instruments with a multi-degree of freedom, applications need to be differentiated depending on the procedures and indications. Therefore, it can be clearly said that these unique innovative systems will never compete against each other.
文摘A 59-year-old man with metastatic an esophageal tumor from hepatocellular carcinoma(HCC) presented with progressive dysphagia.He had undergone liver transplantation for HCC three and a half years prevously.At presentation,his radiological and endoscopic examinations suggested a submucosal tumor in the lower esophagus,causing a luminal stricture.We performed complete resection of the esophageal metastases and esophagogastrostomy reconstruction using the da Vinci robotic system.Recovery was uneventful and he was been doing well 2 mo after surgery.α-fetoprotein level decreased from 510 ng/mL to 30 ng/mL postoperatively.During the follow-up period,he developed a recurrent esophageal stricture at the anastomosis site and this was successfully treated by endoscopic esophageal dilatation.
基金Supported by the New Century Excellent Talents in University(No.NCET-06-0597)Introducing Talents of Discipline of Universities(111Project)(No.B08049)
文摘We investigated the effects of lipopolysaccharide （LPS） and dopamine （DA） on the activation of the prophenoloxidase （proPO） system of Litopenaeus vannamei. LPS and DA were shown with a negative dose-dependent effect on hyalne cells （HC）, semi-granular cells （SGC）, large granular cells （LGC）, and total haemocyte count （THC）. When haemocytes were treated with LPS or DA, serine proteinase activity and intracellular phenoloxidase （PO） activity were significantly reduced, but extracellular PO activity increased significantly. These findings indicated that the reduction in haemocyte counts was mainly because of the degranulation and activation of the proPO system from semi-granule and large granule cells. The PKC inhibitor, chelerythrine, and the TPK inhibitor, genistein, had an inhibitory effect on extracellular PO activity, while serine proteinase and intracellular PO activity increased. This suggests that the LPS and DA induce the activation of proPO in haemocytes via PKC and TPK-related signaling pathways, but serine proteinase may be activated only by PKC, as the genistein effects were not statistically significant. Electrophoresis analysis revealed that POs induced by LPS or DA have the same molecular mass and high diphenolase activity. Two PO bands at 526 kDa and 272 kDa were observed in PAGE, while in the haemocyte lysate supematant （HLS）, only a 272-kDa band was observed. This band was resolved after SDS-PAGE under non-reducing and reducing conditions into two groups of POs, 166 kDa and 126 kDa, and 78.1 kDa and 73.6 kDa, respectively, suggesting that PO in L. vannamei is an oligomer, which may have different compositions intra- and extracellularly.
文摘Introduction:Robotic systems are designed to address the limitations of laparoscopic surgery,leading to a growing interest in robotic rectal surgery.However,certain technical limitations associated with the previous systems(da Vinci S&Si)have arguably slowed down its wholesale adoption.The latest robotic platform,the da Vinci Xi,addresses these limitations.This study aims to examine the short-term surgical outcomes of 240 single-docking fully-robotic rectal cancer resections and compare the outcomes of cases performed with the da Vinci Xi vs Si systems.Materials and methods:All consecutive patients receiving robotic rectal cancer resections from three centres between 2013 and 2018 were identified from prospectively collated databases.The baseline characteristics and short-term surgical outcomes are presented and the da Vinci Xi vs Si system outcomes are analysed.Results:A total of 240 patients were identified(124 Si,116 Xi).Median operation-time and length-of-stay were 260 minutes and 6 days respectively.Conversion and 30-day mortality rates were 0.The da Vinci Si vs Xi system analysis shows that operation-time was lower in the Si group(230 vs 300 min,p=0.000)but length-of-stay,lymph node yield and circumferential resection margin favoured the Xi group(7 vs 5 days,p=0.010;17 vs 21,p=0.000;92.7%vs 99.1%,p=0.020).Conclusion:Single-docking fully-robotic rectal cancer surgery is safe,feasible and can lead to good shortterm outcomes,making it a good alternative to laparoscopic rectal cancer surgery.The new systems technological advances may result in better short-term outcomes but further larger scale observational studies are required if we are to reach such a conclusion.
基金Under the auspices of the National Natural Science Foundation of China(No.U19A2042,U20A2083,42001112)。
文摘This study examined regional differences in ecosystem services for the Da Hinggan Mountains(DHM),China.A correction index was constructed based on ten-year average net primary productivity(NPP)data.A new equivalent factor table that was suitable for the assessment of wetlands in the DHM was formed by using the expert weight determination method(EWDM).An evaluation model was established for evaluating the ecosystem service value(ESV)of wetlands in the DHM.The results show that in 2020,the total ESV of wetlands reached 93361×10^(6) USD,with the forest swamp and marsh ecosystems contributing the most.From the perspective of value composition,regulating services and supporting services are the main service functions of wetlands in the DHM.From 2010 to2020,ESV provided by wetlands increased by 4337×10^(6) USD/yr in the DHM.The value of forest swamp and peatland ecosystems increased by 18.6%and 12.7%,respectively,whereas the value of swamp,shrub swamp,and marsh decreased.The research results are of significance for contributing to local government performance evaluation and determining financial compensation for the provision of wetland ecosystem services.
文摘The sensible and latent heat fluxes over the ocean area near China were calculated and analyzed by usingthe Goddard Earth Observing System (GEOS) - four-dimensional Data Assimilation System (DAS). The calculated results showed that the sensible heat flux had its large value in winter and autumn , small value in spring and summer overthe ocean area near China. In winter, the sensible heat flux increased distinctly with latitude, and its isolines were verycrowded. Over the ocean area east of Taiwan Province and south of Japan, the direction of isoline was from southwestto northeast. In the South China Sea the sensible heat flux was lower than that of surrounding ocean areas,and its isoline was distributed into a type of an inverted trough. In autumn and winter, the maximum center of latent heat flux appeared over the ocean area northeast of Taiwan Province and south and southeast of Japan, meanwhile, the isoline wasin the direction of southwest to northeast. In spring and summer, the latent heat flux had minimum value in the Huanghai Sea. At the same time, the maximum value center of latent heat flux appeared over the ocean area south of Japan inspring.
文摘Three synchrotron radiation beam lines have been built on DAΦNE,the Frascati electron-positron accelerator.It is Possible to monitor and control all the elements on the beam lines using a modular network distributed I/O system by National Instrunments (FieldPoint) with Bridge VIEW/Lab VIEW programs,Two of these beam lines have radiation safety problems solved by two independent and redundant systems,using mechanical switches ,and S7-200 PLC's by Siemens.In this article our solution will be described in details.
文摘Indoor positioning systems (IPSs) have been intended to provide position information of persons and devices. Higher user percentage of handheld devices such as tablets or mobile phones had led to the development of a number of indoor positioning systems. In this research a work on a real time portable RFID indoor positioning device such as on smartphone will be performed. The personal networks will be designed to meet the users’ needs and interconnect users’ devices equipped with different communications technologies in various places to form one network for better result. Radio frequency identification (RFID) with directional antenna has proved its potential for locating objects in indoor environment. Hence, the proposed device idea will be used to exploit various unknown locations in an indoor environment such as college campus;this interpretation will rely on Wireless LAN, Received Signal Strength values from Access Points (AP) in specific mentioned arenas;these APs will be monitored constantly by RFID with directional antenna (DA) and handheld devices. For obtaining the better results from existing devices, algorithms of Range Estimation are proposed, which can be used on various handheld devices for locating indoor objects.
文摘The planning and treatment of wastewater discharged into rivers and seas is vital for tourism,domestic water supply,and other key sectors.This study used the MIKE 21 model to evaluate water quality trends and the assimilative capacity of the Vu Gia River estuary and the major reservoirs in Da Nang,considering future pollution loads and climate change scenarios(RCP8.5).Key parameters assessed include DO,BOD_(5),COD,and Coliform.Results show a general decline in water quality(WQI)from 2019 to 2030 and again by 2070,with DO and BOD_(5)contributing most to pollution.While COD and Coliform remained within acceptable limits(WQI>75),the Phu Loc River had the lowest WQI(66.0–62.2).Other affected areas include the Han River(downstream and upstream)and the Cu De River.Reservoirs like Dong Nghe and Hoa Trung maintained better water quality(WQI>80),though a downward trend was still observed.
