Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(V)and As(III)from the aquas media.Additionally,this investigation highlighted the synergistic effect of calcium carbonate in conjunction with ...Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(V)and As(III)from the aquas media.Additionally,this investigation highlighted the synergistic effect of calcium carbonate in conjunction with iron oxyhydroxide,resulting in enhanced removal efficiency.The experiment was conducted under various conditions:concentration,dosage,pH,agitation,and temperature.Material characterizations such as Brunauer Emmett Teller,X-ray diffraction,scanning electron microscopy,and Fourier transform infrared spectroscopy were implied to understand adsorption mechanisms.The Langmuir model revealed optimal concentrations for As(V)=500μg/L at pH-5 and As(III)=200μg/L at pH-7,resulting in 95%and 93%adsorption efficiencies,respectively.Maximum adsorption capacities“qm”were found to be 1266.943μg/g for As(V)and 1080.241μg/g for As(III).Freundlich model demonstrated favorable adsorption by indicating“n>1”such as As(V)=2.542 and As(III)=2.707;similarly,the speciation factor“RL<1”for both species as As(V)=0.1 and As(III)=0.5,respectively.The kinetic study presented a pseudo-second-order model as best fitted,indicating throughout chemisorption processes for removing As(V)and As(III).Furthermore,incorporating calcium carbonate presented a significant leap in the removal efficiency,indicating As(V)from 95%to 98%and As(III)from 93%to 96%,respectively.Our findings offer profound motivation for developing effective and sustainable solutions to tackle arsenic contamination,underscoring the exceptional promise of iron oxyhydroxide in conjunction with calcium carbonate to achieve maximum removal efficiency.展开更多
Rapid population aging is a social reality facing China at present,and the issue of elderly care has become a hot topic of social concern.Legislation to address the issue of elderly care in the context of population a...Rapid population aging is a social reality facing China at present,and the issue of elderly care has become a hot topic of social concern.Legislation to address the issue of elderly care in the context of population aging should follow systematic concepts to achieve“vertical and horizontal integration.”In terms of content,it is necessary to formulate specific legal approaches around“the elderly and children,”with a focus on guaranteeing the livelihood and protection of the rights of the elderly while taking into account childbirth,employment and other issues.the laws should not only safeguard the social participation and labor rights of the elderly,but also effectively respond to the social challenges brought about by the aging of the population.It is also necessary to optimize the family planning policy to ease the burden of child-raising,improve the population structure and promote the long-term balanced development of the population,thus fundamentally solving the problem of population aging.the effort to improve the legal system to deal with the issue of elderly care in the context of population aging will better advance Chinese modernization.展开更多
In 1996, Mambo et al introduced the concept of proxy signature. However, proxy signature can only provide the delegated authenticity and cannot provide confidentiality. Recently, Gamage et al and Chan and Wei proposed...In 1996, Mambo et al introduced the concept of proxy signature. However, proxy signature can only provide the delegated authenticity and cannot provide confidentiality. Recently, Gamage et al and Chan and Wei proposed different proxy signcryption schemes respectively, which extended the concept of proxy signature. However, only the specified receiver can decrypt and verify the validity of proxy signcryption in their schemes. To protect the receiver's benefit in case of a later dispute, Wu and Hsu proposed a convertible authenticated encryption scheme, which can enable the receiver to convert signature into an ordinary one that can be verified by anyone. Based on Wu and Hsu' s scheme and improved Kim's scheme, we propose a convertible proxy signcryption scheme. The security of the proposed scheme is based on the intractability of reversing the one-way hash function and solving the discrete logarithm problem. The proposed scheme can satisfy all properties of strong proxy signature and withstand the public key substitution attack and does not use secure channel. In addition, the proposed scheme can be extended to convertible threshold proxy signcryption scheme.展开更多
Tax certainty is of paramount importance for businesses.It fosters a stable environment for investment and growth.The Inland Revenue Authority of Singapore(IRAS)seeks to create an environment that provides tax certain...Tax certainty is of paramount importance for businesses.It fosters a stable environment for investment and growth.The Inland Revenue Authority of Singapore(IRAS)seeks to create an environment that provides tax certainty to busi-nesses from both domestic and international tax perspectives,thereby promoting economic growth.展开更多
In the context of today's big data and cloud computing,the global flow of data has become a powerful driver for international economic and investment growth.The EU and the U.S.have created two different paths for ...In the context of today's big data and cloud computing,the global flow of data has become a powerful driver for international economic and investment growth.The EU and the U.S.have created two different paths for the legal regulation of the cross-border flow of personal data due to their respective historical traditions and realistic demands.The requirements for data protection have shown significant differences.The EU advocates localization of data and firmly restricts cross-border flow of personal data.The U.S.tends to protect personal data through industry self-regulation and government law enforcement.At the same time,these two paths also merge and supplement with each other.Based on this,China needs to learn from the legal regulatory paths of the EU and the US,respectively,to establish a legal idea that places equal emphasis on personal data protection and the development of the information industry.In terms of domestic law,the Cybersecurity Law of the People's Republic of China needs to be improved and supplemented by relevant supporting legislation to improve the operability of the law;the industry self-discipline guidelines should be established;and various types of cross-border data need to be classified and supervised.In terms of international law,it is necessary to participate in international cooperation based on the priority of data sovereignty and promote the signing of bilateral,multilateral agreements,and international treaties on the cross-border flow of personal data.展开更多
Times have changed, but Japan＇s mili- taristic ambition has not. On September 18, 1931, Japanese militarists began an invasion of northeast China. After 81 years, two Japanese right-wing activists illegally landed o...Times have changed, but Japan＇s mili- taristic ambition has not. On September 18, 1931, Japanese militarists began an invasion of northeast China. After 81 years, two Japanese right-wing activists illegally landed on the Diaoyu Islands--an inherent part of Chinese territory-- further provoking the Chinese people following Japan＇s illegal ＂purchase＂ of the islands several days earlier. China reiterated its stance on protecting its sovereignty and territorial integrity, stress- ing it reserves all legal rights on the Diaoyu Islands. Observers point out that Japan＇s ag- gressive acts are a threat to regional peace and stability by challenging the existing international territorial structure formed after World War II. They have called on Japan to resume rational and peaceful negotiations on the Diaoyu Islands and get back on the track of regional cooperation.展开更多
With the development of the internet and economic globalization,the global flows of data have become a powerful driving force for global economic and investment growth.In the context of big data and cloud computing,pe...With the development of the internet and economic globalization,the global flows of data have become a powerful driving force for global economic and investment growth.In the context of big data and cloud computing,personal information protection has become an important issue in various fields.International trade agreements are facing challenges in cross-border data flows,and the global financial regulatory system also has problems regarding personal data protection.The European Union and the United States have created two different paths for the legal regulation of the protection of personal information and the cross-border flows of data according to their respective historical traditions and practical demands.China has also made important progress in the protection of personal information.展开更多
1.Overview Since its first emergency,COVID-19 has spread to over 200 countries and regions.On 22 April 2020,WHO re-p orted 2,471,136 positive cases confirmed and 169,006 deaths1.While medical data showed that COVID-19...1.Overview Since its first emergency,COVID-19 has spread to over 200 countries and regions.On 22 April 2020,WHO re-p orted 2,471,136 positive cases confirmed and 169,006 deaths1.While medical data showed that COVID-19 outbreak does not take the first rank of highest death toll pandemic in history,it has shaken the world by bringing the economy to a near-grinding halt.展开更多
基金funded by the National Natural Science Foundation of China(Nos.42177078 and 42020104005).
文摘Synthesized iron oxyhydroxide was applied for the adsorptive removal of As(V)and As(III)from the aquas media.Additionally,this investigation highlighted the synergistic effect of calcium carbonate in conjunction with iron oxyhydroxide,resulting in enhanced removal efficiency.The experiment was conducted under various conditions:concentration,dosage,pH,agitation,and temperature.Material characterizations such as Brunauer Emmett Teller,X-ray diffraction,scanning electron microscopy,and Fourier transform infrared spectroscopy were implied to understand adsorption mechanisms.The Langmuir model revealed optimal concentrations for As(V)=500μg/L at pH-5 and As(III)=200μg/L at pH-7,resulting in 95%and 93%adsorption efficiencies,respectively.Maximum adsorption capacities“qm”were found to be 1266.943μg/g for As(V)and 1080.241μg/g for As(III).Freundlich model demonstrated favorable adsorption by indicating“n>1”such as As(V)=2.542 and As(III)=2.707;similarly,the speciation factor“RL<1”for both species as As(V)=0.1 and As(III)=0.5,respectively.The kinetic study presented a pseudo-second-order model as best fitted,indicating throughout chemisorption processes for removing As(V)and As(III).Furthermore,incorporating calcium carbonate presented a significant leap in the removal efficiency,indicating As(V)from 95%to 98%and As(III)from 93%to 96%,respectively.Our findings offer profound motivation for developing effective and sustainable solutions to tackle arsenic contamination,underscoring the exceptional promise of iron oxyhydroxide in conjunction with calcium carbonate to achieve maximum removal efficiency.
基金supported by the Academic Start-up Plan for Young Teachers at Beijing Institute of Technologythe National Social Science Major Project“Legal System and Trends of U.S.Technology Export Control and China’s Countermeasures”(Project Approval Number 21VGQ002).
文摘Rapid population aging is a social reality facing China at present,and the issue of elderly care has become a hot topic of social concern.Legislation to address the issue of elderly care in the context of population aging should follow systematic concepts to achieve“vertical and horizontal integration.”In terms of content,it is necessary to formulate specific legal approaches around“the elderly and children,”with a focus on guaranteeing the livelihood and protection of the rights of the elderly while taking into account childbirth,employment and other issues.the laws should not only safeguard the social participation and labor rights of the elderly,but also effectively respond to the social challenges brought about by the aging of the population.It is also necessary to optimize the family planning policy to ease the burden of child-raising,improve the population structure and promote the long-term balanced development of the population,thus fundamentally solving the problem of population aging.the effort to improve the legal system to deal with the issue of elderly care in the context of population aging will better advance Chinese modernization.
基金Sponsored by the National Natural Science Foudnation of China (Grant No. 60072018,60273082)National Outstanding Youth Science Foundation of China (Grant No. 60225007)
文摘In 1996, Mambo et al introduced the concept of proxy signature. However, proxy signature can only provide the delegated authenticity and cannot provide confidentiality. Recently, Gamage et al and Chan and Wei proposed different proxy signcryption schemes respectively, which extended the concept of proxy signature. However, only the specified receiver can decrypt and verify the validity of proxy signcryption in their schemes. To protect the receiver's benefit in case of a later dispute, Wu and Hsu proposed a convertible authenticated encryption scheme, which can enable the receiver to convert signature into an ordinary one that can be verified by anyone. Based on Wu and Hsu' s scheme and improved Kim's scheme, we propose a convertible proxy signcryption scheme. The security of the proposed scheme is based on the intractability of reversing the one-way hash function and solving the discrete logarithm problem. The proposed scheme can satisfy all properties of strong proxy signature and withstand the public key substitution attack and does not use secure channel. In addition, the proposed scheme can be extended to convertible threshold proxy signcryption scheme.
文摘Tax certainty is of paramount importance for businesses.It fosters a stable environment for investment and growth.The Inland Revenue Authority of Singapore(IRAS)seeks to create an environment that provides tax certainty to busi-nesses from both domestic and international tax perspectives,thereby promoting economic growth.
基金This article is supported by Law and Technology Institute,Renmin University of China.All mistakes and omissions are the responsibility of the author.
文摘In the context of today's big data and cloud computing,the global flow of data has become a powerful driver for international economic and investment growth.The EU and the U.S.have created two different paths for the legal regulation of the cross-border flow of personal data due to their respective historical traditions and realistic demands.The requirements for data protection have shown significant differences.The EU advocates localization of data and firmly restricts cross-border flow of personal data.The U.S.tends to protect personal data through industry self-regulation and government law enforcement.At the same time,these two paths also merge and supplement with each other.Based on this,China needs to learn from the legal regulatory paths of the EU and the US,respectively,to establish a legal idea that places equal emphasis on personal data protection and the development of the information industry.In terms of domestic law,the Cybersecurity Law of the People's Republic of China needs to be improved and supplemented by relevant supporting legislation to improve the operability of the law;the industry self-discipline guidelines should be established;and various types of cross-border data need to be classified and supervised.In terms of international law,it is necessary to participate in international cooperation based on the priority of data sovereignty and promote the signing of bilateral,multilateral agreements,and international treaties on the cross-border flow of personal data.
文摘Times have changed, but Japan＇s mili- taristic ambition has not. On September 18, 1931, Japanese militarists began an invasion of northeast China. After 81 years, two Japanese right-wing activists illegally landed on the Diaoyu Islands--an inherent part of Chinese territory-- further provoking the Chinese people following Japan＇s illegal ＂purchase＂ of the islands several days earlier. China reiterated its stance on protecting its sovereignty and territorial integrity, stress- ing it reserves all legal rights on the Diaoyu Islands. Observers point out that Japan＇s ag- gressive acts are a threat to regional peace and stability by challenging the existing international territorial structure formed after World War II. They have called on Japan to resume rational and peaceful negotiations on the Diaoyu Islands and get back on the track of regional cooperation.
文摘With the development of the internet and economic globalization,the global flows of data have become a powerful driving force for global economic and investment growth.In the context of big data and cloud computing,personal information protection has become an important issue in various fields.International trade agreements are facing challenges in cross-border data flows,and the global financial regulatory system also has problems regarding personal data protection.The European Union and the United States have created two different paths for the legal regulation of the protection of personal information and the cross-border flows of data according to their respective historical traditions and practical demands.China has also made important progress in the protection of personal information.
文摘1.Overview Since its first emergency,COVID-19 has spread to over 200 countries and regions.On 22 April 2020,WHO re-p orted 2,471,136 positive cases confirmed and 169,006 deaths1.While medical data showed that COVID-19 outbreak does not take the first rank of highest death toll pandemic in history,it has shaken the world by bringing the economy to a near-grinding halt.
