How enterprises overcome the digital divide in a digital economy is a topic related to efficiency and fairness.The formation of the digital divide has showcased a certain level of objectivity and is also influenced by...How enterprises overcome the digital divide in a digital economy is a topic related to efficiency and fairness.The formation of the digital divide has showcased a certain level of objectivity and is also influenced by the characteristics of enterprises themselves.Based on the model that expands the information and communication technology(ICT)access,concept,we explored the digital divide’s formation logic of the digital divide and feasible ways to cross it.Our findings shed light on its formation logic,which includes elements of the subjective will of enterprises to transform,the fear of transformation,the dependence on development paths,and the cost of using digital technology,all of which have contributed to disparities in enterprises’motivational access.In addition,differences in the construction of digital infrastructure,financial strengths,business models,and heterogeneity in cluster networks have led to differences in enterprises’material access.The absorptive capacity of enterprises has affected their skill access,while the management capability influences the application access of enterprises.We also found that crossing the digital divide requires the joint efforts of governments,markets,and enterprises in the four access dimensions.展开更多
Innovation provides opportunities to all countries,as advancement in technology and globalization of economic markets encourage global competition and increase the role of governments in gaining a strategic competitiv...Innovation provides opportunities to all countries,as advancement in technology and globalization of economic markets encourage global competition and increase the role of governments in gaining a strategic competitive advantage while boosting economic growth and productivity.According to the OECD,innovation can make a difference in addressing developmental challenges and providing catalyst for countries to accelerate business processes and practices that improve public service efficiency.The public sector plays a significant role in modern economies and innovation is a necessary condition for improving government services to the public and creating a competitive economy.Israel is known as the“start-up nation”,but innovation policies and strategies relating to the public sector are less developed than those of business innovation due to lack of innovation culture,digital divide,and bureaucracy.The research examines innovation in the public sector in Israel compared to other OECD countries.It is argued that despite the enormous influence of high-tech and start-ups on the economy and gross of national product,the flourishing technology sector has not contributed to other sectors of the economy and the performance of the public service lags behind the private sector in terms of innovation and efficiency.The research concludes that implementing Israel’s success in business innovation into the public sector requires long-run strategic investments and public policies to increase the supply and quality of human capital and infrastructure.The goal should be to narrow digital divide with other developed countries and advance the technological capabilities and productivity of the public service.展开更多
Mobile and Internet network coverage plays an important role in digital transformation and the exploitation of new services. The evolution of mobile networks from the first generation (1G) to the 5th generation is sti...Mobile and Internet network coverage plays an important role in digital transformation and the exploitation of new services. The evolution of mobile networks from the first generation (1G) to the 5th generation is still a long process. 2G networks have developed the messaging service, which complements the already operational voice service. 2G technology has rapidly progressed to the third generation (3G), incorporating multimedia data transmission techniques. It then progressed to fourth generation (4G) and LTE (Long Term Evolution), increasing the transmission speed to improve 3G. Currently, developed countries have already moved to 5G. In developing countries, including Burundi, a member of the East African Community (ECA) where more than 80% are connected to 2G technologies, 40% are connected to the 3G network and 25% to the 4G network and are not yet connected to the 5G network and then still a process. The objective of this article is to analyze the coverage of 2G, 3G and 4G networks in Burundi. This analysis will make it possible to identify possible deficits in order to reduce the digital divide between connected urban areas and remote rural areas. Furthermore, this analysis will draw the attention of decision-makers to the need to deploy networks and coverage to allow the population to access mobile and Internet services and thus enable the digitalization of the population. Finally, this article shows the level of coverage, the digital divide and an overview of the deployment of base stations (BTS) throughout the country to promote the transformation and digital inclusion of services.展开更多
With internet and smartphone usage increasing every year,seniors are being exposed to digital media,either actively or passively.To better integrate into the information society for the elderly,efforts are also needed...With internet and smartphone usage increasing every year,seniors are being exposed to digital media,either actively or passively.To better integrate into the information society for the elderly,efforts are also needed to clarify the causes of their digital disconnection and develop appropriate solutions.In this study,semi-structured interviews are utilized to investigate the self-adjustment and external intervention of the elderly in the age of digital media and to explore the ways,causes,and effects of digital disconnection of the elderly.The focus issue of this study is to clarify the subjective and objective factors of digital disconnection,especially cognitive problems,group influences,and technological access barriers in the elderly population concerning digital devices and the Internet.展开更多
This study investigates the status of digital divide amongst Jordanian Telecentres. The objective of this study is to analyze the impact of the perceived usefulness, the perceived ease-of-use and the facilitating cond...This study investigates the status of digital divide amongst Jordanian Telecentres. The objective of this study is to analyze the impact of the perceived usefulness, the perceived ease-of-use and the facilitating conditions on the behavioral intention of employees. In addition, the study investigates the effect of the three mentioned factors on the user acceptance while the behavioral intention on the user acceptance is used as a mediating factor. The proposed research model was validated by distributing 150 survey questionnaires to the Telecentres in Jordan. Structural equation modeling (SEM) technique was used to analyze the results. One of the main limitations of this study is that the results cannot be universal since the study was limited to Jordan. Similar study needs to be conducted in different courtiers to either support or negate our results.展开更多
This paper explores key policy issues of national information and communication technology development to identify the gap between the heterogeneity in issues pertaining to the "digital divide". How this issue is ca...This paper explores key policy issues of national information and communication technology development to identify the gap between the heterogeneity in issues pertaining to the "digital divide". How this issue is cast often as a problem to be solved in recent years. On the public policy front, a series of reports issued by Taiwan Residents policymakers were endeavored to address universal services and digital divide issues. Government also has taken various steps to mitigate the disparity in opportunities to access the Internet (e.g., "e-Taiwan" for broadband services, "M-Taiwan" for broadband infrastructure and heterogeneous network services, and "i-Taiwan" for ubiquitous networks and digital convergence by Taiwan's Cabinet). However, when policymakers worked to craft solutions to the pressing societal concern, they found lots of policy agendas need to redefine to foster greater understanding and enlighten practice for policy going forward. An examination of conflicting narratives within policy has been conducted, which identified not only the earlier debates were framed, but also key agendas of the most studied and empirical data used among them. The article attempts to examine the topic from a longitudinal perspective by using sets of documents revealed a tendency over time to explore how particular the agendas and debates of "digital divide" were framed. The study traced back to policy debates from cultural, economic, educational, and political perspectives at various Internet diffusion stages. The results provide useful insights into the study and discussion on new convergence policy making implications.展开更多
She never thought the countryside scene could be so interesting. "The ancient farmers' houses of these Zhuang minority groups have threefloors--the first is for raising animals like pigs and hens, the second is for ...She never thought the countryside scene could be so interesting. "The ancient farmers' houses of these Zhuang minority groups have threefloors--the first is for raising animals like pigs and hens, the second is for people and the third is for storing grain and corn.展开更多
Regional inequality significantly influences sustainable development and human well-being.In China,there exists pronounced regional disparities in economic and digital advancements;however,scant research delves into t...Regional inequality significantly influences sustainable development and human well-being.In China,there exists pronounced regional disparities in economic and digital advancements;however,scant research delves into the interplay between them.By analyzing the economic development and digitalization gaps at regional and city levels in China,extending the original Cobb-Douglas production function,this study aims to evaluate the impact of digitalization on China's regional inequality using seemingly unrelated regression.The results indicate a greater emphasis on digital inequality compared to economic disparity,with variable coefficients of 0.59 for GDP per capita and 0.92 for the digitalization index over the past four years.However,GDP per capita demonstrates higher spatial concentration than digitalization.Notably,both disparities have shown a gradual reduction in recent years.The southeastern region of the Hu Huanyong Line exhibits superior levels and rates of economic and digital advancement in contrast to the northwestern region.While digitalization propels economic growth,it yields a nuanced impact on achieving balanced regional development,encompassing both positive and negative facets.Our study highlights that the marginal utility of advancing digitalization is more pronounced in less developed regions,but only if the government invests in the digital infrastructure and education in these areas.This study's methodology can be utilized for subsequent research,and our findings hold the potential to the government's regional investment and policy-making.展开更多
A new analytical model is proposed and constructedin this paper through studying the two-stage courseand the marginal replication cost of informationproducts. The economic nature of digital divide isuncovered and that...A new analytical model is proposed and constructedin this paper through studying the two-stage courseand the marginal replication cost of informationproducts. The economic nature of digital divide isuncovered and that is of the economic value and theallotment styles of information and knowledge. Basedon the proposed model and taken China, Americaand Russia as examples, the empirical analyses areflexibly made and policy explanations for bridgingthe divide are given.展开更多
The integration of digital teaching resources in higher education has become increasingly prevalent,offering transformative potential for teaching and learning.This study employed a mixed-methods approach to investiga...The integration of digital teaching resources in higher education has become increasingly prevalent,offering transformative potential for teaching and learning.This study employed a mixed-methods approach to investigate the application and impact of digital resources on learning outcomes within higher education settings.Quantitative data from surveys indicated a positive correlation between digital resource usage and learning motivation,with students demonstrating higher knowledge retention and engagement levels.Qualitative interviews highlighted themes such as personalization,engagement,and the challenges of the digital divide and professional development needs.The research underscores the importance of strategic integration,equitable access,and ongoing support for educators and students.Recommendations for higher education institutions and policy makers include improving digital access,fostering a culture of innovation,and providing professional development opportunities.The study also identifies areas for future research,such as the long-term impact of digital resources and the potential of emerging technologies.展开更多
This article reviews the concept of digital divide and particularly discusses the digital divide among K-12 students in rural and urban China,as well as the e-learning strategies initiated by the Chinese government th...This article reviews the concept of digital divide and particularly discusses the digital divide among K-12 students in rural and urban China,as well as the e-learning strategies initiated by the Chinese government that were designed to minimize this digital divide in China.This article concludes by explaining the issue of skills on effective e-learning and correspondingly making suggestions for English teachers in K-12 schools in China.展开更多
BACKGROUND Handling of the inferior mesenteric artery(IMA)and maintaining anastomotic perfusion are important in radical resection of left-sided colorectal cancer.However,the branching of this artery and the drainage ...BACKGROUND Handling of the inferior mesenteric artery(IMA)and maintaining anastomotic perfusion are important in radical resection of left-sided colorectal cancer.However,the branching of this artery and the drainage patterns of this vein vary among individuals,and the characteristics and perfusion region of this artery in elderly patients remain unclear.AIM To evaluate the characteristics and perfusion region of the IMA in elderly patients using angiography.METHODS We enrolled 154 patients(>65 years old)who underwent digital subtraction angiography of the IMA.The characteristics,bifurcation,and distribution of the IMA and termination of the anastomotic perfusion of the left colon and rectum were examined using digital subtraction angiography.Collateral arterial arches and the IMA hemoperfusion region were also recorded.Perfusion regions were cross-referenced with clinical and anatomical features by the univariate analysis.RESULTS Of 154 patients,25(16.2%)had IMA lesions.The left colic artery arose independently from the IMA in 44.2%of patients,shared a trunk with the sigmoid artery in 35.1%,shared an opening with the sigmoid and superior rectal arteries in 16.9%,and was absent in 5.1%.The IMA perfusion region stopped at the splenic flexure in 50(32.5%)patients.The collateral circulation existed in the colonic perfusion region,including the marginal artery(Drummond’s artery),the ascending branch of the left colonic artery to supply the transverse colon,and the arc of Riolan with a frequency of 100%,22.7%,and 1.9%,respectively.The IMA perfusion region was independently associated with the comorbidity of atherosclerosis,IMA atherosclerotic lesion,branching pattern,collateral circulation,and marginal artery integrity.CONCLUSION The IMA and its branches are prone to arteriosclerosis,and IMA perfusion may be interrupted at the splenic flexure in elderly patients.The applicability and precision of preoperative angiography for evaluating the IMA branching and perfusion patterns could facilitate geriatric laparoscopic left-sided colorectal cancer surgery with suspicion of poor IMA perfusion.展开更多
The developments in the field of Information and Communication Technology (ICT) in the country has rapidly happen after year 2009 .Government has developed many programs and initiations to develop ICT in the country...The developments in the field of Information and Communication Technology (ICT) in the country has rapidly happen after year 2009 .Government has developed many programs and initiations to develop ICT in the country after three decades of war was ended up. As a result disabled community can make many opportunities to use the ICT and at the same time create a gap, which is commonly referred to as Disability Digital Divide. The purpose of this study was to examine empirically the current status of adoption of ICT and in turn the digital divide resulting from which in the disability community in Sri Lanka and the factors affecting this behavior. A questionnaire and Interviewed based survey (n = 107) was carried out to collect the data from the disabled people who used ICT in the Colombo, Gampaha, and Kaluthara district. An empirical model was developed to show the relationship between the level of adoption of 10 basic, intermediate, and advanced ICT facilities and a number of factors to reflect the WWW, Smart phones, and Computer usage aspects of disabled community. Based on the Innovatiotr---Diffusion Theory, the status of Digital Divide of a disabled community was specified by means of an Index. The results show that this community did not become innovators or early-adopters of ICT by adopting WWW or computer related technologies but was mostly confined to the smart phone related facilities. The results from this study highlight that the income of a disabled person, awareness about the information and technology, interest of new technology usage, social and cultural background of a person, use of English language in day-to-day life give a significant impact on the adoption oflCT by the disabled community.展开更多
Since we have entered the informational epoch, the general application of information technology originates various kinds of effects that are divided into positive part and negative part, which the research of digital...Since we have entered the informational epoch, the general application of information technology originates various kinds of effects that are divided into positive part and negative part, which the research of digital divide in the disabled group is raised under this background.In modern society, the disabled is an absolutely weak group which confronts the circumstance that is hard to adapt to when they face up with the impact in informational era for their physical or psychological disabilities. Strictly speaking, the issue of digital divide in the disabled group is part of the negative effect which is brought in by information technology. Meanwhile, it is a branch of digital divide issue. But the concern and solution for the digital divide issue embody a government's attitude and deed towards the new problem in the informational epoch, meanwhile they show esteem to the human rights and social equity in the new era.This article first describes and discusses the digital divide issue of the disabled group in China. Then, it focuses on the solutions or actions that Chinese local governments take towards the issue. Finally, it introduces Section 508 of the Rehabilitation Act as a reference to China from the legislative perspective.展开更多
The invention of the World Wide Web, especially the Web 2.0, originally led some sociologists to believe that this tool would have favoured the creation of a "collective intelligence" able to spread and increase the...The invention of the World Wide Web, especially the Web 2.0, originally led some sociologists to believe that this tool would have favoured the creation of a "collective intelligence" able to spread and increase the level of democracy in the society. Nowadays, as a matter of fact, Information and Communications Technologies (ICTs) continue excluding part of the population and contribute to a top-down organisation of the main streams of information neutralising active potentialities and risking, paradoxically, to isolate users who are not aware of the mechanisms of the lnternet. The "doxic" acceptance of web contents, structures, and tools indeed precludes some kinds of knowledge and some different models of participation, with significant consequences on the social construction of reality. As a result, a tendency emerges towards a virtual-only participation and the click-tivism seems more and more to be turning into a form of slack-tivism.展开更多
The feasibility of the hybrid chaotic sequences as the spreading codes in code divided multiple access(CDMA) system is analyzed. The design and realization of the digital hybrid chaotic sequence generator by very high...The feasibility of the hybrid chaotic sequences as the spreading codes in code divided multiple access(CDMA) system is analyzed. The design and realization of the digital hybrid chaotic sequence generator by very high speed integrated circuit hardware description language(VHDL) are described. A valid hazard canceledl method is presented. Computer simulations show that the stable digital sequence waveforms can be produced. The correlations of the digital hybrid chaotic sequences are compared with those of m-sequences. The results show that the correlations of the digital hybrid chaotic sequences are almost as good as those of m-sequences. The works in this paper explored a road for the practical applications of chaos.展开更多
Promoting income equality between urban and rural residents is one of the main goals of China’s social progress and economic development.It is also a necessary means to achieve“common prosperity.”Digital economy ca...Promoting income equality between urban and rural residents is one of the main goals of China’s social progress and economic development.It is also a necessary means to achieve“common prosperity.”Digital economy can effectively promote economic development,the adjustment of industry structure and industry upgrading,as well as increase the disposable income of urban and rural residents,which is theoretically beneficial to rural-urban income disparity.An empirical analysis is conducted based on the data of 30 provinces,municipalities,and autonomous regions in China from 2013 to 2020.The findings demonstrate that the growth of digital economy helps lessen rural-urban income disparity and has a significant effect in East China and North China.展开更多
文摘How enterprises overcome the digital divide in a digital economy is a topic related to efficiency and fairness.The formation of the digital divide has showcased a certain level of objectivity and is also influenced by the characteristics of enterprises themselves.Based on the model that expands the information and communication technology(ICT)access,concept,we explored the digital divide’s formation logic of the digital divide and feasible ways to cross it.Our findings shed light on its formation logic,which includes elements of the subjective will of enterprises to transform,the fear of transformation,the dependence on development paths,and the cost of using digital technology,all of which have contributed to disparities in enterprises’motivational access.In addition,differences in the construction of digital infrastructure,financial strengths,business models,and heterogeneity in cluster networks have led to differences in enterprises’material access.The absorptive capacity of enterprises has affected their skill access,while the management capability influences the application access of enterprises.We also found that crossing the digital divide requires the joint efforts of governments,markets,and enterprises in the four access dimensions.
文摘Innovation provides opportunities to all countries,as advancement in technology and globalization of economic markets encourage global competition and increase the role of governments in gaining a strategic competitive advantage while boosting economic growth and productivity.According to the OECD,innovation can make a difference in addressing developmental challenges and providing catalyst for countries to accelerate business processes and practices that improve public service efficiency.The public sector plays a significant role in modern economies and innovation is a necessary condition for improving government services to the public and creating a competitive economy.Israel is known as the“start-up nation”,but innovation policies and strategies relating to the public sector are less developed than those of business innovation due to lack of innovation culture,digital divide,and bureaucracy.The research examines innovation in the public sector in Israel compared to other OECD countries.It is argued that despite the enormous influence of high-tech and start-ups on the economy and gross of national product,the flourishing technology sector has not contributed to other sectors of the economy and the performance of the public service lags behind the private sector in terms of innovation and efficiency.The research concludes that implementing Israel’s success in business innovation into the public sector requires long-run strategic investments and public policies to increase the supply and quality of human capital and infrastructure.The goal should be to narrow digital divide with other developed countries and advance the technological capabilities and productivity of the public service.
文摘Mobile and Internet network coverage plays an important role in digital transformation and the exploitation of new services. The evolution of mobile networks from the first generation (1G) to the 5th generation is still a long process. 2G networks have developed the messaging service, which complements the already operational voice service. 2G technology has rapidly progressed to the third generation (3G), incorporating multimedia data transmission techniques. It then progressed to fourth generation (4G) and LTE (Long Term Evolution), increasing the transmission speed to improve 3G. Currently, developed countries have already moved to 5G. In developing countries, including Burundi, a member of the East African Community (ECA) where more than 80% are connected to 2G technologies, 40% are connected to the 3G network and 25% to the 4G network and are not yet connected to the 5G network and then still a process. The objective of this article is to analyze the coverage of 2G, 3G and 4G networks in Burundi. This analysis will make it possible to identify possible deficits in order to reduce the digital divide between connected urban areas and remote rural areas. Furthermore, this analysis will draw the attention of decision-makers to the need to deploy networks and coverage to allow the population to access mobile and Internet services and thus enable the digitalization of the population. Finally, this article shows the level of coverage, the digital divide and an overview of the deployment of base stations (BTS) throughout the country to promote the transformation and digital inclusion of services.
文摘With internet and smartphone usage increasing every year,seniors are being exposed to digital media,either actively or passively.To better integrate into the information society for the elderly,efforts are also needed to clarify the causes of their digital disconnection and develop appropriate solutions.In this study,semi-structured interviews are utilized to investigate the self-adjustment and external intervention of the elderly in the age of digital media and to explore the ways,causes,and effects of digital disconnection of the elderly.The focus issue of this study is to clarify the subjective and objective factors of digital disconnection,especially cognitive problems,group influences,and technological access barriers in the elderly population concerning digital devices and the Internet.
文摘This study investigates the status of digital divide amongst Jordanian Telecentres. The objective of this study is to analyze the impact of the perceived usefulness, the perceived ease-of-use and the facilitating conditions on the behavioral intention of employees. In addition, the study investigates the effect of the three mentioned factors on the user acceptance while the behavioral intention on the user acceptance is used as a mediating factor. The proposed research model was validated by distributing 150 survey questionnaires to the Telecentres in Jordan. Structural equation modeling (SEM) technique was used to analyze the results. One of the main limitations of this study is that the results cannot be universal since the study was limited to Jordan. Similar study needs to be conducted in different courtiers to either support or negate our results.
文摘This paper explores key policy issues of national information and communication technology development to identify the gap between the heterogeneity in issues pertaining to the "digital divide". How this issue is cast often as a problem to be solved in recent years. On the public policy front, a series of reports issued by Taiwan Residents policymakers were endeavored to address universal services and digital divide issues. Government also has taken various steps to mitigate the disparity in opportunities to access the Internet (e.g., "e-Taiwan" for broadband services, "M-Taiwan" for broadband infrastructure and heterogeneous network services, and "i-Taiwan" for ubiquitous networks and digital convergence by Taiwan's Cabinet). However, when policymakers worked to craft solutions to the pressing societal concern, they found lots of policy agendas need to redefine to foster greater understanding and enlighten practice for policy going forward. An examination of conflicting narratives within policy has been conducted, which identified not only the earlier debates were framed, but also key agendas of the most studied and empirical data used among them. The article attempts to examine the topic from a longitudinal perspective by using sets of documents revealed a tendency over time to explore how particular the agendas and debates of "digital divide" were framed. The study traced back to policy debates from cultural, economic, educational, and political perspectives at various Internet diffusion stages. The results provide useful insights into the study and discussion on new convergence policy making implications.
文摘She never thought the countryside scene could be so interesting. "The ancient farmers' houses of these Zhuang minority groups have threefloors--the first is for raising animals like pigs and hens, the second is for people and the third is for storing grain and corn.
基金funded by National Natural Science Foundation of China(Grants No.42171210,42371194)Major Project of Key Research Bases for Humanities and Social Sciences Funded by the Ministry of Education of China(Grant No.22JJD790015).
文摘Regional inequality significantly influences sustainable development and human well-being.In China,there exists pronounced regional disparities in economic and digital advancements;however,scant research delves into the interplay between them.By analyzing the economic development and digitalization gaps at regional and city levels in China,extending the original Cobb-Douglas production function,this study aims to evaluate the impact of digitalization on China's regional inequality using seemingly unrelated regression.The results indicate a greater emphasis on digital inequality compared to economic disparity,with variable coefficients of 0.59 for GDP per capita and 0.92 for the digitalization index over the past four years.However,GDP per capita demonstrates higher spatial concentration than digitalization.Notably,both disparities have shown a gradual reduction in recent years.The southeastern region of the Hu Huanyong Line exhibits superior levels and rates of economic and digital advancement in contrast to the northwestern region.While digitalization propels economic growth,it yields a nuanced impact on achieving balanced regional development,encompassing both positive and negative facets.Our study highlights that the marginal utility of advancing digitalization is more pronounced in less developed regions,but only if the government invests in the digital infrastructure and education in these areas.This study's methodology can be utilized for subsequent research,and our findings hold the potential to the government's regional investment and policy-making.
文摘A new analytical model is proposed and constructedin this paper through studying the two-stage courseand the marginal replication cost of informationproducts. The economic nature of digital divide isuncovered and that is of the economic value and theallotment styles of information and knowledge. Basedon the proposed model and taken China, Americaand Russia as examples, the empirical analyses areflexibly made and policy explanations for bridgingthe divide are given.
文摘The integration of digital teaching resources in higher education has become increasingly prevalent,offering transformative potential for teaching and learning.This study employed a mixed-methods approach to investigate the application and impact of digital resources on learning outcomes within higher education settings.Quantitative data from surveys indicated a positive correlation between digital resource usage and learning motivation,with students demonstrating higher knowledge retention and engagement levels.Qualitative interviews highlighted themes such as personalization,engagement,and the challenges of the digital divide and professional development needs.The research underscores the importance of strategic integration,equitable access,and ongoing support for educators and students.Recommendations for higher education institutions and policy makers include improving digital access,fostering a culture of innovation,and providing professional development opportunities.The study also identifies areas for future research,such as the long-term impact of digital resources and the potential of emerging technologies.
文摘This article reviews the concept of digital divide and particularly discusses the digital divide among K-12 students in rural and urban China,as well as the e-learning strategies initiated by the Chinese government that were designed to minimize this digital divide in China.This article concludes by explaining the issue of skills on effective e-learning and correspondingly making suggestions for English teachers in K-12 schools in China.
基金Supported by the National Natural Science Foundation of China,No.81800483.
文摘BACKGROUND Handling of the inferior mesenteric artery(IMA)and maintaining anastomotic perfusion are important in radical resection of left-sided colorectal cancer.However,the branching of this artery and the drainage patterns of this vein vary among individuals,and the characteristics and perfusion region of this artery in elderly patients remain unclear.AIM To evaluate the characteristics and perfusion region of the IMA in elderly patients using angiography.METHODS We enrolled 154 patients(>65 years old)who underwent digital subtraction angiography of the IMA.The characteristics,bifurcation,and distribution of the IMA and termination of the anastomotic perfusion of the left colon and rectum were examined using digital subtraction angiography.Collateral arterial arches and the IMA hemoperfusion region were also recorded.Perfusion regions were cross-referenced with clinical and anatomical features by the univariate analysis.RESULTS Of 154 patients,25(16.2%)had IMA lesions.The left colic artery arose independently from the IMA in 44.2%of patients,shared a trunk with the sigmoid artery in 35.1%,shared an opening with the sigmoid and superior rectal arteries in 16.9%,and was absent in 5.1%.The IMA perfusion region stopped at the splenic flexure in 50(32.5%)patients.The collateral circulation existed in the colonic perfusion region,including the marginal artery(Drummond’s artery),the ascending branch of the left colonic artery to supply the transverse colon,and the arc of Riolan with a frequency of 100%,22.7%,and 1.9%,respectively.The IMA perfusion region was independently associated with the comorbidity of atherosclerosis,IMA atherosclerotic lesion,branching pattern,collateral circulation,and marginal artery integrity.CONCLUSION The IMA and its branches are prone to arteriosclerosis,and IMA perfusion may be interrupted at the splenic flexure in elderly patients.The applicability and precision of preoperative angiography for evaluating the IMA branching and perfusion patterns could facilitate geriatric laparoscopic left-sided colorectal cancer surgery with suspicion of poor IMA perfusion.
文摘The developments in the field of Information and Communication Technology (ICT) in the country has rapidly happen after year 2009 .Government has developed many programs and initiations to develop ICT in the country after three decades of war was ended up. As a result disabled community can make many opportunities to use the ICT and at the same time create a gap, which is commonly referred to as Disability Digital Divide. The purpose of this study was to examine empirically the current status of adoption of ICT and in turn the digital divide resulting from which in the disability community in Sri Lanka and the factors affecting this behavior. A questionnaire and Interviewed based survey (n = 107) was carried out to collect the data from the disabled people who used ICT in the Colombo, Gampaha, and Kaluthara district. An empirical model was developed to show the relationship between the level of adoption of 10 basic, intermediate, and advanced ICT facilities and a number of factors to reflect the WWW, Smart phones, and Computer usage aspects of disabled community. Based on the Innovatiotr---Diffusion Theory, the status of Digital Divide of a disabled community was specified by means of an Index. The results show that this community did not become innovators or early-adopters of ICT by adopting WWW or computer related technologies but was mostly confined to the smart phone related facilities. The results from this study highlight that the income of a disabled person, awareness about the information and technology, interest of new technology usage, social and cultural background of a person, use of English language in day-to-day life give a significant impact on the adoption oflCT by the disabled community.
文摘Since we have entered the informational epoch, the general application of information technology originates various kinds of effects that are divided into positive part and negative part, which the research of digital divide in the disabled group is raised under this background.In modern society, the disabled is an absolutely weak group which confronts the circumstance that is hard to adapt to when they face up with the impact in informational era for their physical or psychological disabilities. Strictly speaking, the issue of digital divide in the disabled group is part of the negative effect which is brought in by information technology. Meanwhile, it is a branch of digital divide issue. But the concern and solution for the digital divide issue embody a government's attitude and deed towards the new problem in the informational epoch, meanwhile they show esteem to the human rights and social equity in the new era.This article first describes and discusses the digital divide issue of the disabled group in China. Then, it focuses on the solutions or actions that Chinese local governments take towards the issue. Finally, it introduces Section 508 of the Rehabilitation Act as a reference to China from the legislative perspective.
文摘The invention of the World Wide Web, especially the Web 2.0, originally led some sociologists to believe that this tool would have favoured the creation of a "collective intelligence" able to spread and increase the level of democracy in the society. Nowadays, as a matter of fact, Information and Communications Technologies (ICTs) continue excluding part of the population and contribute to a top-down organisation of the main streams of information neutralising active potentialities and risking, paradoxically, to isolate users who are not aware of the mechanisms of the lnternet. The "doxic" acceptance of web contents, structures, and tools indeed precludes some kinds of knowledge and some different models of participation, with significant consequences on the social construction of reality. As a result, a tendency emerges towards a virtual-only participation and the click-tivism seems more and more to be turning into a form of slack-tivism.
文摘The feasibility of the hybrid chaotic sequences as the spreading codes in code divided multiple access(CDMA) system is analyzed. The design and realization of the digital hybrid chaotic sequence generator by very high speed integrated circuit hardware description language(VHDL) are described. A valid hazard canceledl method is presented. Computer simulations show that the stable digital sequence waveforms can be produced. The correlations of the digital hybrid chaotic sequences are compared with those of m-sequences. The results show that the correlations of the digital hybrid chaotic sequences are almost as good as those of m-sequences. The works in this paper explored a road for the practical applications of chaos.
基金supported by the 2022 College Students’Innovation and Entrepreneurship Training Program of School of Economics and Management,North China University of Technology“Research on the Impact of the Digital Economy on the Income of Urban and Rural Residents”(Project Number:108051360022XN413).
文摘Promoting income equality between urban and rural residents is one of the main goals of China’s social progress and economic development.It is also a necessary means to achieve“common prosperity.”Digital economy can effectively promote economic development,the adjustment of industry structure and industry upgrading,as well as increase the disposable income of urban and rural residents,which is theoretically beneficial to rural-urban income disparity.An empirical analysis is conducted based on the data of 30 provinces,municipalities,and autonomous regions in China from 2013 to 2020.The findings demonstrate that the growth of digital economy helps lessen rural-urban income disparity and has a significant effect in East China and North China.