Modern conflicts demand substantial physical and psychological exertion,often resulting in fatigue and diminished combat or operational readiness.Several exoskeletons have been developed recently to address these chal...Modern conflicts demand substantial physical and psychological exertion,often resulting in fatigue and diminished combat or operational readiness.Several exoskeletons have been developed recently to address these challenges,presenting various limitations that affect their operational or everyday usability.This article evaluates the performance of a dual-purpose passive ankle exoskeleton developed for the reduction of metabolic costs during walking,seeking to identify a force element that could be applied to the target population.Based on the 6-min walk test,twenty-nine subjects participated in the study using three different force elements.The results indicate that it is possible to reduce metabolic expenditure while using the developed exoskeleton.Additionally,the comfort and range of motion results verify the exoskeleton's suitability for use in uneven terrain and during extended periods.Nevertheless,the choice of the force element should be tailored to each user,and the control system should be adjustable to optimise the exoskeleton's performance.展开更多
Field experiments were carried out to study the effect of different foliar fertilizer treatments on the agronomic traits,yield,and quality of Brassica napus L.for both vegetable and oil dual-use rape.The seedlings of...Field experiments were carried out to study the effect of different foliar fertilizer treatments on the agronomic traits,yield,and quality of Brassica napus L.for both vegetable and oil dual-use rape.The seedlings of‘Youtai 929’,‘Jinyoutai 1’,and‘Zhongshuang 11’were sprayed with potassium dihydrogen phosphate,naphthylacetic acid,and selenium fertilizer,and the agronomic traits,yield,and quality were determined.The results showed that the naphthylacetic acid treatment had the highest indexes before winter,followed by the selenium fertilizer treatment.At the harvesting stage,the plant height,number of siliquae,yield per plant,and number of effective branches on the main stem of the three varieties were the highest in the naphthylacetic acid treatment,followed by those in the potassium dihydrogen phosphate treatment.The fresh shoot quality was the best in the selenium fertilizer treatment and the second in the naphthylacetic acid treatment.‘Jinyoutai 1’applied with naphthylacetic acid had the highest economic benefit of 4971.78 CNY/667m2,which was 642.32 CNY/667m2 higher than that of the control.The findings suggested that naphthylacetic acid was suitable to be used as the foliar fertilizer for the seedlings of B.napus varieties for both vegetable and oilseed,and the additional application of selenium fertilizer demonstrated better effect.展开更多
This paper proposes a new information modulation resorting to orthogonal signal and its phase for dual-function radar communication(DFRC)systems.Focusing on the standardized linear frequency modulation(LFM)signal by a...This paper proposes a new information modulation resorting to orthogonal signal and its phase for dual-function radar communication(DFRC)systems.Focusing on the standardized linear frequency modulation(LFM)signal by additional phase,a bank of signals enjoying satisfactory autocorrelation and cross-correlation characteristics,are generated.Then,these signals map the different information as well as their phases are also modulated to increase the communication bit rate,thus yielding a series of dual-use signals.Finally,the radar detection and communication performance of dual-use signals are also provided through numerical simulation and half-physical platform verification,confirming the effectiveness of the designed signals compared with the existing design strategy.展开更多
The paper firstly introduces the conditions of NIS in America and Japan, then analyzes the condition and problems in NIS of China, and lastly illustrates the strategic meaning of Civil-military Integration NIS.
The increasing threat posed by state and nonstate actors seeking to misuse scientific and technological developments means it is more important than ever to ensure the responsible conduct of life sciences research,bio...The increasing threat posed by state and nonstate actors seeking to misuse scientific and technological developments means it is more important than ever to ensure the responsible conduct of life sciences research,biosecurity research,and dual-use research of concern(DURC).Pakistan has a rapidly growing research environment and,being a signatory to the Biological Toxins and Weapons Convention,is committed to raising DURC awareness among its researchers.To this end,a series of five workshops were conducted in Pakistan between July 2018 and January 2020 with the support of the United States organization Health Security Partners.The workshops targeted universities offering postgraduate programs in life and medical sciences.The purpose of the workshops was to enable participants to understand the concept of DURC,review their own research,determine if any of their experiments may be DURC,identify potential risks while conducting the research,and develop protocols to mitigate DURC threats.A pre-and post-workshop questionnaire evaluated the knowledge of the participants.Evaluations of both the course and facilitators were obtained at each workshop.展开更多
In response to the outbreak of COVID-19 that has been sweeping the world,scientists reconstructed the SARSCoV-2 rapidly using a synthetic genomics platform,in order to accelerate therapeutics and vaccine development.H...In response to the outbreak of COVID-19 that has been sweeping the world,scientists reconstructed the SARSCoV-2 rapidly using a synthetic genomics platform,in order to accelerate therapeutics and vaccine development.However,given the dual-use nature of this technology,there exists a high biosecurity risk.This paper points out the potential risks of the engineering SARS-CoV-2 virus and puts forward 6 questions to this work.The authors emphasize that the two basic values of safety/security and intellectual freedom of research must be considered evenly.From the perspective of responsible development of biotechnology,this paper calls for a careful assessment to the risks of the technology,replacing risky technologies with safe ones.The risks of publication also need to be strictly assessed.The authors believe,in addition to enhancing the“self-government”and self-discipline of scientists and scientific communities,government supervision must be reinforced,laws and regulations should be improved,and global regulation framework ought to be constructed.展开更多
Biosafety issues have become a major threat to the health of humans,animals,and ecosystems worldwide.As problems with food production and the food supply chain have become of greater concern to consumers,issues involv...Biosafety issues have become a major threat to the health of humans,animals,and ecosystems worldwide.As problems with food production and the food supply chain have become of greater concern to consumers,issues involving biosafety and food safety from a developmental perspective need to be urgently addressed.The term,food biosafety,is the combination of the core concepts of biosafety and food safety.It refers to the effective prevention of biological threats to food production and the food supply chain by controlling foodborne diseases arising from the consumption of edible plants and animal products,by preventing the establishment of invasive species,by strictly controlling the use of antibiotics,agricultural chemicals and veterinary drugs in the food supply chain,and by initiating food defense and anti-terrorism measures to protect the health of humans,animals,and ecosystems,thereby maintaining sustainable development in China.This article provides theoretical support for the extension of food biosafety to propose an innovative plan for the international co-governance of food safety.展开更多
基金the Portuguese Army,through CINAMIL,within project ELITE2-Enhancement LITe ExoskeletonFoundation for Science and Technology (FCT),through IDMEC,under LAETA,project UIDB/50022/2020 for supporting this research。
文摘Modern conflicts demand substantial physical and psychological exertion,often resulting in fatigue and diminished combat or operational readiness.Several exoskeletons have been developed recently to address these challenges,presenting various limitations that affect their operational or everyday usability.This article evaluates the performance of a dual-purpose passive ankle exoskeleton developed for the reduction of metabolic costs during walking,seeking to identify a force element that could be applied to the target population.Based on the 6-min walk test,twenty-nine subjects participated in the study using three different force elements.The results indicate that it is possible to reduce metabolic expenditure while using the developed exoskeleton.Additionally,the comfort and range of motion results verify the exoskeleton's suitability for use in uneven terrain and during extended periods.Nevertheless,the choice of the force element should be tailored to each user,and the control system should be adjustable to optimise the exoskeleton's performance.
文摘Field experiments were carried out to study the effect of different foliar fertilizer treatments on the agronomic traits,yield,and quality of Brassica napus L.for both vegetable and oil dual-use rape.The seedlings of‘Youtai 929’,‘Jinyoutai 1’,and‘Zhongshuang 11’were sprayed with potassium dihydrogen phosphate,naphthylacetic acid,and selenium fertilizer,and the agronomic traits,yield,and quality were determined.The results showed that the naphthylacetic acid treatment had the highest indexes before winter,followed by the selenium fertilizer treatment.At the harvesting stage,the plant height,number of siliquae,yield per plant,and number of effective branches on the main stem of the three varieties were the highest in the naphthylacetic acid treatment,followed by those in the potassium dihydrogen phosphate treatment.The fresh shoot quality was the best in the selenium fertilizer treatment and the second in the naphthylacetic acid treatment.‘Jinyoutai 1’applied with naphthylacetic acid had the highest economic benefit of 4971.78 CNY/667m2,which was 642.32 CNY/667m2 higher than that of the control.The findings suggested that naphthylacetic acid was suitable to be used as the foliar fertilizer for the seedlings of B.napus varieties for both vegetable and oilseed,and the additional application of selenium fertilizer demonstrated better effect.
基金This work was supported in part by the National Natural Science Foundation of China(61771109,U19B2017,61871080,61701088)the China Postdoctoral Science Foundation(2020M68147)。
文摘This paper proposes a new information modulation resorting to orthogonal signal and its phase for dual-function radar communication(DFRC)systems.Focusing on the standardized linear frequency modulation(LFM)signal by additional phase,a bank of signals enjoying satisfactory autocorrelation and cross-correlation characteristics,are generated.Then,these signals map the different information as well as their phases are also modulated to increase the communication bit rate,thus yielding a series of dual-use signals.Finally,the radar detection and communication performance of dual-use signals are also provided through numerical simulation and half-physical platform verification,confirming the effectiveness of the designed signals compared with the existing design strategy.
文摘The paper firstly introduces the conditions of NIS in America and Japan, then analyzes the condition and problems in NIS of China, and lastly illustrates the strategic meaning of Civil-military Integration NIS.
文摘The increasing threat posed by state and nonstate actors seeking to misuse scientific and technological developments means it is more important than ever to ensure the responsible conduct of life sciences research,biosecurity research,and dual-use research of concern(DURC).Pakistan has a rapidly growing research environment and,being a signatory to the Biological Toxins and Weapons Convention,is committed to raising DURC awareness among its researchers.To this end,a series of five workshops were conducted in Pakistan between July 2018 and January 2020 with the support of the United States organization Health Security Partners.The workshops targeted universities offering postgraduate programs in life and medical sciences.The purpose of the workshops was to enable participants to understand the concept of DURC,review their own research,determine if any of their experiments may be DURC,identify potential risks while conducting the research,and develop protocols to mitigate DURC threats.A pre-and post-workshop questionnaire evaluated the knowledge of the participants.Evaluations of both the course and facilitators were obtained at each workshop.
基金This work was supported by research grants from the National Key R&D Program of China"Research on the ethical policy and regulatory framework of precision medicine"(No.2017YFC0910100)the Major Program of the National Social Science Fund of China"Research on high-tech ethical issues(No.12&ZD117)the Emergency management project of the National Natural Science Foundation of China"Study on ethics and integrity governance of scientific research"(No.71843009).
文摘In response to the outbreak of COVID-19 that has been sweeping the world,scientists reconstructed the SARSCoV-2 rapidly using a synthetic genomics platform,in order to accelerate therapeutics and vaccine development.However,given the dual-use nature of this technology,there exists a high biosecurity risk.This paper points out the potential risks of the engineering SARS-CoV-2 virus and puts forward 6 questions to this work.The authors emphasize that the two basic values of safety/security and intellectual freedom of research must be considered evenly.From the perspective of responsible development of biotechnology,this paper calls for a careful assessment to the risks of the technology,replacing risky technologies with safe ones.The risks of publication also need to be strictly assessed.The authors believe,in addition to enhancing the“self-government”and self-discipline of scientists and scientific communities,government supervision must be reinforced,laws and regulations should be improved,and global regulation framework ought to be constructed.
文摘Biosafety issues have become a major threat to the health of humans,animals,and ecosystems worldwide.As problems with food production and the food supply chain have become of greater concern to consumers,issues involving biosafety and food safety from a developmental perspective need to be urgently addressed.The term,food biosafety,is the combination of the core concepts of biosafety and food safety.It refers to the effective prevention of biological threats to food production and the food supply chain by controlling foodborne diseases arising from the consumption of edible plants and animal products,by preventing the establishment of invasive species,by strictly controlling the use of antibiotics,agricultural chemicals and veterinary drugs in the food supply chain,and by initiating food defense and anti-terrorism measures to protect the health of humans,animals,and ecosystems,thereby maintaining sustainable development in China.This article provides theoretical support for the extension of food biosafety to propose an innovative plan for the international co-governance of food safety.
