With the rapid advancement in exploring perceptual interactions and digital twins,metaverse technology has emerged to transcend the constraints of space-time and reality,facilitating remote AI-based collaboration.In t...With the rapid advancement in exploring perceptual interactions and digital twins,metaverse technology has emerged to transcend the constraints of space-time and reality,facilitating remote AI-based collaboration.In this dynamic metasystem environment,frequent information exchanges necessitate robust security measures,with Authentication and Key Agreement(AKA)serving as the primary line of defense to ensure communication security.However,traditional AKA protocols fall short in meeting the low-latency requirements essential for synchronous interactions within the metaverse.To address this challenge and enable nearly latency-free interactions,a novel low-latency AKA protocol based on chaotic maps is proposed.This protocol not only ensures mutual authentication of entities within the metasystem but also generates secure session keys.The security of these session keys is rigorously validated through formal proofs,formal verification,and informal proofs.When confronted with the Dolev-Yao(DY)threat model,the session keys are formally demonstrated to be secure under the Real-or-Random(ROR)model.The proposed protocol is further validated through simulations conducted using VMware workstation compiled in HLPSL language and C language.The simulation results affirm the protocol’s effectiveness in resisting well-known attacks while achieving the desired low latency for optimal metaverse interactions.展开更多
Background: When continuous scale measurements are available, agreements between two measuring devices are assessed both graphically and analytically. In clinical investigations, Bland and Altman proposed plotting sub...Background: When continuous scale measurements are available, agreements between two measuring devices are assessed both graphically and analytically. In clinical investigations, Bland and Altman proposed plotting subject-wise differences between raters against subject-wise averages. In order to scientifically assess agreement, Bartko recommended combining the graphical approach with the statistical analytic procedure suggested by Bradley and Blackwood. The advantage of using this approach is that it enables significance testing and sample size estimation. We noted that the direct use of the results of the regression is misleading and we provide a correction in this regard. Methods: Graphical and linear models are used to assess agreements for continuous scale measurements. We demonstrate that software linear regression results should not be readily used and we provided correct analytic procedures. The degrees of freedom of the F-statistics are incorrectly reported, and we propose methods to overcome this problem by introducing the correct analytic form of the F statistic. Methods for sample size estimation using R-functions are also given. Results: We believe that the tutorial and the R-codes are useful tools for testing and estimating agreement between two rating protocols for continuous scale measurements. The interested reader may use the codes and apply them to their available data when the issue of agreement between two raters is the subject of interest.展开更多
This article aims at giving a contribution to the issue of accounting electrical energy sale and purchase agreements in accordance with the faithful representation principle. To this end, it must be ascertained whethe...This article aims at giving a contribution to the issue of accounting electrical energy sale and purchase agreements in accordance with the faithful representation principle. To this end, it must be ascertained whether electrical energy is bought/sold for an industrial use exclusively, so that the relevant transaction will be accounted as a normal purchase/sale, or through the lease of the relevant production plant, which would require the supply contract to be accounted in compliance with International Accounting Standards （IAS） 17 ＂Leasing＂. Alternatively, it must also be ascertained whether the relevant party is implementing financial trading strategies, as in such hypothesis, the supply contract is to be accounted as a financial instrument according to International Financial Reporting Standards （IFRS） 9/IAS 39 ＂Financial Instruments＂. Finally, the modalities used by a number of companies listed on European regulated markets to account such kind of contracts will be analyzed.展开更多
Properly created and securely communicated,non-disclosure agreement(NDA)can resolve most of the common disputes related to outsourcing of offshore software maintenance(OSMO).Occasionally,these NDAs are in the form of ...Properly created and securely communicated,non-disclosure agreement(NDA)can resolve most of the common disputes related to outsourcing of offshore software maintenance(OSMO).Occasionally,these NDAs are in the form of images.Since the work is done offshore,these agreements or images must be shared through the Internet or stored over the cloud.The breach of privacy,on the other hand,is a potential threat for the image owners as both the Internet and cloud servers are not void of danger.This article proposes a novel algorithm for securing the NDAs in the form of images.As an agreement is signed between the two parties,it will be encrypted before sending to the cloud server or travelling through the public network,the Internet.As the image is input to the algorithm,its pixels would be scrambled through the set of randomly generated rectangles for an arbitrary amount of time.The confusion effects have been realized through an XOR operation between the confused image,and chaotic data.Besides,5D multi-wing hyperchaotic system has been employed to spawn the chaotic vectors due to good properties of chaoticity it has.The machine experimentation and the security analysis through a comprehensive set of validation metric vividly demonstrate the robustness,defiance to the multifarious threats and the prospects for some real-world application of the proposed encryption algorithm for the NDA images.展开更多
Why did the European Union （EU） conclude an Association Agreement （A.A）, rather than a free-trade agreement with Central American （CA） countries in 2010？ A CA-EU AA content analysis within the broader EU policy...Why did the European Union （EU） conclude an Association Agreement （A.A）, rather than a free-trade agreement with Central American （CA） countries in 2010？ A CA-EU AA content analysis within the broader EU policy approach towards Latin America suggests it to be （1） the only feasible option for each side at a time of increasing commercial flux; （2） mutually attractive against globalizing threats, thus converting an institutional innovation into a double-edged instrument; and （3） illustrative of the subtle but significant shift of farm-protection demands from endogenous dynamics to exogenous. They carry important implications： （1） empirically： weak CA-EU linkages further dilute West Europe＇s broader Latin ambitions; （2） theoretically： AA analyses better reflect trading realities than pure regional economic integration theories, suggesting the corrosive impact of globalizing forces on regional pursuits; and （3） historically： the continued role of the farm jinx in trade.展开更多
This study reassesses the macroeconomic and social impacts of Economic Partnership Agreements （EPAs） on Ivorian economy using Computable General Equilibrium （CGE） model with positive externalities of public invest...This study reassesses the macroeconomic and social impacts of Economic Partnership Agreements （EPAs） on Ivorian economy using Computable General Equilibrium （CGE） model with positive externalities of public investment in education, health, and economic infrastructure. Previous studies highlight negative effect of these agreements stressing particularly on losses in government revenues due to the removal of all tariffs on imports. This analysis aims to provide some insight into this question by refreshing the debate to show how this situation could be transformed into opportunities for Ivory Coast in order to promote growth and reduce poverty. To do so, this study postulates that government spending （investment） in economic infrastructure （roads, bridges, communication network, etc.）, in education and health sectors produces positive externalities in each industry. This assumption has not been set anymore in previous studies. Simulation results reveal that, despite this decline in government revenues, if it invests in economic infrastructure, health and education sector, EPAs will generate more revenue for government due to the rise in income tax on firms and households, and tax on overall production. Furthermore, household income will increase which will in turn stimulate （final） consumption. There won＇t also be a decline in economic growth.展开更多
基金This work has received funding from National Natural Science Foundation of China(No.42275157).
文摘With the rapid advancement in exploring perceptual interactions and digital twins,metaverse technology has emerged to transcend the constraints of space-time and reality,facilitating remote AI-based collaboration.In this dynamic metasystem environment,frequent information exchanges necessitate robust security measures,with Authentication and Key Agreement(AKA)serving as the primary line of defense to ensure communication security.However,traditional AKA protocols fall short in meeting the low-latency requirements essential for synchronous interactions within the metaverse.To address this challenge and enable nearly latency-free interactions,a novel low-latency AKA protocol based on chaotic maps is proposed.This protocol not only ensures mutual authentication of entities within the metasystem but also generates secure session keys.The security of these session keys is rigorously validated through formal proofs,formal verification,and informal proofs.When confronted with the Dolev-Yao(DY)threat model,the session keys are formally demonstrated to be secure under the Real-or-Random(ROR)model.The proposed protocol is further validated through simulations conducted using VMware workstation compiled in HLPSL language and C language.The simulation results affirm the protocol’s effectiveness in resisting well-known attacks while achieving the desired low latency for optimal metaverse interactions.
文摘Background: When continuous scale measurements are available, agreements between two measuring devices are assessed both graphically and analytically. In clinical investigations, Bland and Altman proposed plotting subject-wise differences between raters against subject-wise averages. In order to scientifically assess agreement, Bartko recommended combining the graphical approach with the statistical analytic procedure suggested by Bradley and Blackwood. The advantage of using this approach is that it enables significance testing and sample size estimation. We noted that the direct use of the results of the regression is misleading and we provide a correction in this regard. Methods: Graphical and linear models are used to assess agreements for continuous scale measurements. We demonstrate that software linear regression results should not be readily used and we provided correct analytic procedures. The degrees of freedom of the F-statistics are incorrectly reported, and we propose methods to overcome this problem by introducing the correct analytic form of the F statistic. Methods for sample size estimation using R-functions are also given. Results: We believe that the tutorial and the R-codes are useful tools for testing and estimating agreement between two rating protocols for continuous scale measurements. The interested reader may use the codes and apply them to their available data when the issue of agreement between two raters is the subject of interest.
文摘This article aims at giving a contribution to the issue of accounting electrical energy sale and purchase agreements in accordance with the faithful representation principle. To this end, it must be ascertained whether electrical energy is bought/sold for an industrial use exclusively, so that the relevant transaction will be accounted as a normal purchase/sale, or through the lease of the relevant production plant, which would require the supply contract to be accounted in compliance with International Accounting Standards （IAS） 17 ＂Leasing＂. Alternatively, it must also be ascertained whether the relevant party is implementing financial trading strategies, as in such hypothesis, the supply contract is to be accounted as a financial instrument according to International Financial Reporting Standards （IFRS） 9/IAS 39 ＂Financial Instruments＂. Finally, the modalities used by a number of companies listed on European regulated markets to account such kind of contracts will be analyzed.
基金This research is fully funded by Universiti Teknologi Malaysia under the UTM Fundamental Research Grant(UTMFR)with Cost Center No Q.K130000.2556.21H14.
文摘Properly created and securely communicated,non-disclosure agreement(NDA)can resolve most of the common disputes related to outsourcing of offshore software maintenance(OSMO).Occasionally,these NDAs are in the form of images.Since the work is done offshore,these agreements or images must be shared through the Internet or stored over the cloud.The breach of privacy,on the other hand,is a potential threat for the image owners as both the Internet and cloud servers are not void of danger.This article proposes a novel algorithm for securing the NDAs in the form of images.As an agreement is signed between the two parties,it will be encrypted before sending to the cloud server or travelling through the public network,the Internet.As the image is input to the algorithm,its pixels would be scrambled through the set of randomly generated rectangles for an arbitrary amount of time.The confusion effects have been realized through an XOR operation between the confused image,and chaotic data.Besides,5D multi-wing hyperchaotic system has been employed to spawn the chaotic vectors due to good properties of chaoticity it has.The machine experimentation and the security analysis through a comprehensive set of validation metric vividly demonstrate the robustness,defiance to the multifarious threats and the prospects for some real-world application of the proposed encryption algorithm for the NDA images.
文摘Why did the European Union （EU） conclude an Association Agreement （A.A）, rather than a free-trade agreement with Central American （CA） countries in 2010？ A CA-EU AA content analysis within the broader EU policy approach towards Latin America suggests it to be （1） the only feasible option for each side at a time of increasing commercial flux; （2） mutually attractive against globalizing threats, thus converting an institutional innovation into a double-edged instrument; and （3） illustrative of the subtle but significant shift of farm-protection demands from endogenous dynamics to exogenous. They carry important implications： （1） empirically： weak CA-EU linkages further dilute West Europe＇s broader Latin ambitions; （2） theoretically： AA analyses better reflect trading realities than pure regional economic integration theories, suggesting the corrosive impact of globalizing forces on regional pursuits; and （3） historically： the continued role of the farm jinx in trade.
文摘This study reassesses the macroeconomic and social impacts of Economic Partnership Agreements （EPAs） on Ivorian economy using Computable General Equilibrium （CGE） model with positive externalities of public investment in education, health, and economic infrastructure. Previous studies highlight negative effect of these agreements stressing particularly on losses in government revenues due to the removal of all tariffs on imports. This analysis aims to provide some insight into this question by refreshing the debate to show how this situation could be transformed into opportunities for Ivory Coast in order to promote growth and reduce poverty. To do so, this study postulates that government spending （investment） in economic infrastructure （roads, bridges, communication network, etc.）, in education and health sectors produces positive externalities in each industry. This assumption has not been set anymore in previous studies. Simulation results reveal that, despite this decline in government revenues, if it invests in economic infrastructure, health and education sector, EPAs will generate more revenue for government due to the rise in income tax on firms and households, and tax on overall production. Furthermore, household income will increase which will in turn stimulate （final） consumption. There won＇t also be a decline in economic growth.
