Objective: This study aims to use reflective theory and critical emancipatory theory to explore nurses' communicative role with unsatisfied clients.Methods: This paper begins with the broad issue, and the analysis...Objective: This study aims to use reflective theory and critical emancipatory theory to explore nurses' communicative role with unsatisfied clients.Methods: This paper begins with the broad issue, and the analysis will engage Smyth's cycle, which includes describing, analyzing,exploring, and reconstructing.Results: Critical emancipatory reflection is essential to make changes in the professional practice of nursing, because it is of primary importance for the professional learning and development of a nurse.Conclusions: Critical emancipatory reflection helps a nurse to analyze the constraints, including historical, sociocultural, political, and personal aspects.展开更多
This paper examines whether truckers have been over-stigmatized as HIV carriers in the country. Data were taken from cross-sectional surveys of clients of female sex workers conducted in 2006-2007 in 12 districts of t...This paper examines whether truckers have been over-stigmatized as HIV carriers in the country. Data were taken from cross-sectional surveys of clients of female sex workers conducted in 2006-2007 in 12 districts of the country. A total 4822 clients of female sex workers were covered in the survey. Low-income skilled/semi-skilled men, including non-agricultural/casual labor, and petty businessmen/small shop owners, have the largest share in the clients’ population. There was no significant difference between truckers and other sub-group of clients’ population in terms of consistent condom use with female sex workers and prevalence of HIV or STI. These evidences suggest that the contribution of truckers in HIV epidemic in India might to similar to other sub-groups of clients’ population. Thus, truckers might have been over-stigmatized as HIV carriers in the country. However, there is no doubt that truckers constitute an extremely important target group for the HIV prevention programs and these efforts must be continued to prevent new HIV infections in the country.展开更多
Background: The Anonymous Screening and Information Centre (CADI) is the oldest screening centre of HIV from Burkina Faso. Since its opening, no analysis on the evolution of Human Immunodeficiency Virus (HIV) prevalen...Background: The Anonymous Screening and Information Centre (CADI) is the oldest screening centre of HIV from Burkina Faso. Since its opening, no analysis on the evolution of Human Immunodeficiency Virus (HIV) prevalence has been carried out. Objective: The study aimed to describe the dynamics of HIV infection when managing centres offering voluntary counselling and testing to client, such as the Screening and Counselling Centre (CADI), in Bobo Dioulasso, Burkina Faso. Patients and Methods: A cross-sectional study was performed including people screened at the CADI from May 1996 to June 2014. Pearson khi2 test and Cuzick trend test were used with a 5% significance level. Results: From 7.1% of the 11,451 cases analyzed, the average age of clients screened was 30 ± 10.83 year-old. There was a female predominance (sex ratio = 0.8). The 16.4% (15.7 - 17.1) of the cases from the 11,451 clients included in our study were tested HIV positive. The global prevalence rate of HIV in the centre has significantly decreased from 46.2% in 1996 to 1.5% in 2014 (p Conclusion: The behaviour change could be a justification for the decline in HIV prevalence at the centre, hence the importance of sensitization campaigns.展开更多
<strong>Background</strong>: The aim at this study is to establish the effectiveness of case management (CM) compared to care as usual (CAU) in patients with schizophrenia. <strong>Methods</strong...<strong>Background</strong>: The aim at this study is to establish the effectiveness of case management (CM) compared to care as usual (CAU) in patients with schizophrenia. <strong>Methods</strong>: 128 patients with schizophrenia were recruited from the community of Haidian District (Beijing, China), 68 patients in the CM group and 60 patients in the CAU group. Efficacy and safety information were assessed at one year follow-up. The relapse rate was similar in both groups after 12 months followed up (7% and 5%). The withdraw rate was significant lower in CM group compared with CAU group (10% and 36%). <strong>Results</strong>: There is no significant difference in PANSS, PSP and SSMI score between 2 groups at each visit. Between endpoint and baseline, there is a significant improvement on PANSS negative score and PSP in patients treated with CM, while CAU group was not significantly changed. <strong>Conclusions</strong>: There is a possible effectiveness of CM group of improving negative symptoms and social function in schizophrenia clients.展开更多
Aim: Client perception was important to indicate points requiring interventions or adjustments and to permit refinement of the services offered. This study aimed to determine the perception of internal clients regardi...Aim: Client perception was important to indicate points requiring interventions or adjustments and to permit refinement of the services offered. This study aimed to determine the perception of internal clients regarding the quality of the service after integrating these items into the system of electronic prescription. Methods: We applied a questionnaire elaborated based on the SERVQUAL about the five dimensions of service quality (tangibility, reliability, responsiveness, safety, and empathy) with adaptation of the four-point Likert scale, ranging from “I fully disagree” to “I fully agree”. Results: The instrument was applied to 138 professionals, with a 56% return. Analysis revealed that the strong points were related to tangibility, safety and empathy, while the aspects related to reliability showed a lower score regarding time of delivery, occurrences and waste, and those related to responsiveness showed a lower score regarding service to be provided in a timely manner. The Cronbach Alpha Coefficient indicated that the investigation had a high degree of consistency and that the results could be considered reliable. Conclusion: Application of the adapted SERVQUAL questionnaire revealed that the perception of internal clients about the five quality dimensions after the changes made and provided valuable information for the scoring of aspects that still needed adjustment to improve interventions.展开更多
Nowadays,as lightweight mobile clients become more powerful and widely used,more and more information is stored on lightweight mobile clients,user sensitive data privacy protection has become an urgent concern and pro...Nowadays,as lightweight mobile clients become more powerful and widely used,more and more information is stored on lightweight mobile clients,user sensitive data privacy protection has become an urgent concern and problem to be solved.There has been a corresponding rise of security solutions proposed by researchers,however,the current security mechanisms on lightweight mobile clients are proven to be fragile.Due to the fact that this research field is immature and still unexplored in-depth,with this paper,we aim to provide a structured and comprehensive study on privacy protection using trusted execution environment(TEE)for lightweight mobile clients.This paper presents a highly effective and secure lightweight mobile client privacy protection system that utilizes TEE to provide a new method for privacy protection.In particular,the prototype of Lightweight Mobile Clients Privacy Protection Using Trusted Execution Environments(LMCPTEE)is built using Intel software guard extensions(SGX)because SGX can guarantee the integrity,confidentiality,and authenticity of private data.By putting lightweight mobile client critical data on SGX,the security and privacy of client data can be greatly improved.We design the authentication mechanism and privacy protection strategy based on SGX to achieve hardware-enhanced data protection and make a trusted connection with the lightweight mobile clients,thus build the distributed trusted system architecture.The experiment demonstrates that without relying on the performance of the blockchain,the LMCPTEE is practical,feasible,low-performance overhead.It can guarantee the privacy and security of lightweight mobile client private data.展开更多
<strong>Background:</strong> Client satisfaction is considered as one of the desired outcomes of health care service delivery and it is directly related to the utilization of any health services. The famil...<strong>Background:</strong> Client satisfaction is considered as one of the desired outcomes of health care service delivery and it is directly related to the utilization of any health services. The family planning clinic remains one of the important health care delivery outlets where client satisfaction guarantees continuation of usage, hence this study. <strong>Objective: </strong>The objective of this study is to assess the determinants of client satisfaction with the family planning (FP) services provided in Port Harcourt. <strong>Materials and methods: </strong>This was a descriptive prospective cross-sectional study conducted between 18th of June 2018 and 18th of July 2018. The target population is women of reproductive age group (15 - 49) who visited 11 randomly selected family planning health facilities in Port Harcourt during the study period. A set of exit interviewer-administered questionnaire (pretested for reliability and validity) was used for data collection from a sample size of 195 respondents;and analyzed using SPSS 22.0. Standard deviation was used for continuous variable while categorical variables were presented in simple percentages and frequencies. The P value was set at <0.05 and confidence interval was 95%. <strong>Results: </strong>Age range 30 - 39 years constituted the largest proportion of 51.3%. A large proportion of the women (87.2%) expressed satisfaction with FP services provided. All respondents said the facilities were easily accessible, clean and were treated respectfully. However, only about half of the clients (51.3%) received their chosen contraceptive product after 1 hour. <strong>Conclusion: </strong>A huge proportion of family planning clients expressed satisfaction with family planning service delivery in Port Harcourt;not minding the longer waiting time. Implication of this is continued use and by implication improved contraceptive prevalence.展开更多
Data sharing and privacy protection are made possible by federated learning,which allows for continuous model parameter sharing between several clients and a central server.Multiple reliable and high-quality clients m...Data sharing and privacy protection are made possible by federated learning,which allows for continuous model parameter sharing between several clients and a central server.Multiple reliable and high-quality clients must participate in practical applications for the federated learning global model to be accurate,but because the clients are independent,the central server cannot fully control their behavior.The central server has no way of knowing the correctness of the model parameters provided by each client in this round,so clients may purposefully or unwittingly submit anomalous data,leading to abnormal behavior,such as becoming malicious attackers or defective clients.To reduce their negative consequences,it is crucial to quickly detect these abnormalities and incentivize them.In this paper,we propose a Federated Learning framework for Detecting and Incentivizing Abnormal Clients(FL-DIAC)to accomplish efficient and security federated learning.We build a detector that introduces an auto-encoder for anomaly detection and use it to perform anomaly identification and prevent the involvement of abnormal clients,in particular for the anomaly client detection problem.Among them,before the model parameters are input to the detector,we propose a Fourier transform-based anomaly data detectionmethod for dimensionality reduction in order to reduce the computational complexity.Additionally,we create a credit scorebased incentive structure to encourage clients to participate in training in order tomake clients actively participate.Three training models(CNN,MLP,and ResNet-18)and three datasets(MNIST,Fashion MNIST,and CIFAR-10)have been used in experiments.According to theoretical analysis and experimental findings,the FL-DIAC is superior to other federated learning schemes of the same type in terms of effectiveness.展开更多
This work carried out a measurement study of the Ethereum Peer-to-Peer(P2P)network to gain a better understanding of the underlying nodes.Ethereum was applied because it pioneered distributed applications,smart contra...This work carried out a measurement study of the Ethereum Peer-to-Peer(P2P)network to gain a better understanding of the underlying nodes.Ethereum was applied because it pioneered distributed applications,smart contracts,and Web3.Moreover,its application layer language“Solidity”is widely used in smart contracts across different public and private blockchains.To this end,we wrote a new Ethereum client based on Geth to collect Ethereum node information.Moreover,various web scrapers have been written to collect nodes’historical data fromthe Internet Archive and the Wayback Machine project.The collected data has been compared with two other services that harvest the number of Ethereumnodes.Ourmethod has collectedmore than 30% more than the other services.The data trained a neural network model regarding time series to predict the number of online nodes in the future.Our findings show that there are less than 20% of the same nodes daily,indicating thatmost nodes in the network change frequently.It poses a question of the stability of the network.Furthermore,historical data shows that the top ten countries with Ethereum clients have not changed since 2016.The popular operating system of the underlying nodes has shifted from Windows to Linux over time,increasing node security.The results have also shown that the number of Middle East and North Africa(MENA)Ethereum nodes is neglected compared with nodes recorded from other regions.It opens the door for developing new mechanisms to encourage users from these regions to contribute to this technology.Finally,the model has been trained and demonstrated an accuracy of 92% in predicting the future number of nodes in the Ethereum network.展开更多
Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing...Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing, including the Beijing Urban Map, Beijing Subway System layout and Beijing Suburban Scenic Spots. The map also shows the exact locations of展开更多
Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing...Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing, including the Beijing Urban Map, Beijing Subway System layout and Beijing Suburban Scenic Spots. The map also shows the exact locations of展开更多
Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijinq...Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijinq, including the Beijing Urban Map, Beijing Subway System lay- out and Beijing Suburban Scenic Spots. The map also shows the exact locations of Beijinq city scenic spots, food and entertainment venues special streets and shopping areas.展开更多
LOCATED at the corner of Yong’an Street near Tianqiao in south Beijing is an exquisite three-storey white building with upturned eaves, a plain but graceful facade with a hint of the antique. As patrons enter and cli...LOCATED at the corner of Yong’an Street near Tianqiao in south Beijing is an exquisite three-storey white building with upturned eaves, a plain but graceful facade with a hint of the antique. As patrons enter and climb the stairs they catch sight of framed paintings that line the walls along the staircase展开更多
HAO Huizhen cannot forget the joy she felt winning her first lawsuit dealing with a transnational marriage case. The court decided that Hao’s litigant voluntarily offered his ex-wife ￥5,000. The first trial was anno...HAO Huizhen cannot forget the joy she felt winning her first lawsuit dealing with a transnational marriage case. The court decided that Hao’s litigant voluntarily offered his ex-wife ￥5,000. The first trial was announced effective because the defendant didn’t lodge an appeal. Hao carefully researched the economic conditions of both sides and collected 18 pieces of evidence. Based on this evidence, she put forth a 15,000-character statement for the plaintiff which won the decision of the court. The plaintiff, a man from another country, did not have to pay his estranged wife ￥300,000 she had demanded. Settling this first transnational marriage court case increased Hao’s confidence in herself. As a result,展开更多
Intelligent Financial Advisors(IFAs)in online financial applications(apps)have brought new life to personal investment by providing appropriate and high-quality portfolios for users.In real-world scenarios,identifying...Intelligent Financial Advisors(IFAs)in online financial applications(apps)have brought new life to personal investment by providing appropriate and high-quality portfolios for users.In real-world scenarios,identifying potential clients is a crucial issue for IFAs,i.e.,identifying users who are willing to purchase the portfolios.Thus,extracting useful information from various characteristics of users and further predicting their purchase inclination are urgent.However,two critical problems encountered in real practice make this prediction task challenging,i.e.,sample selection bias and data sparsity.In this study,we formalize a potential conversion relationship,i.e.,user→activated user→client and decompose this relationship into three related tasks.Then,we propose a Multitask Feature Extraction Model(MFEM),which can leverage useful information contained in these related tasks and learn them jointly,thereby solving the two problems simultaneously.In addition,we design a two-stage feature selection algorithm to select highly relevant user features efficiently and accurately from an incredibly huge number of user feature fields.Finally,we conduct extensive experiments on a real-world dataset provided by a famous fintech bank.Experimental results clearly demonstrate the effectiveness of MFEM.展开更多
Background: In developing countries, access to modern contraceptive methods remains a concern, particularly in Sub-Saharan Africa (SSA). Although satisfactory progress in increasing family planning use has been observ...Background: In developing countries, access to modern contraceptive methods remains a concern, particularly in Sub-Saharan Africa (SSA). Although satisfactory progress in increasing family planning use has been observed worldwide, demand and unmet need continue to grow. This study describes the different reasons that push women in rural and urban areas of Kongo Central province in the Democratic Republic of Congo (DRC) to choose one of the modern contraceptive methods. Methods: A cross-sectional, analytical study on the 705 clients recruited during the family planning mini-campaigns organized from January to March 2021 in 8 health zones of the Kongo Central Province in DRC. Community Contraceptive Methods Distributors (CCMD) collected the data, community health workers (CHW) trained in clinical providers’ community family planning service. The Pearson’s Chi<sup>2</sup> test was used to compare the proportions of the methods chosen in the different study variables categories, and logistic regression was done to analyze the strength of association between the uses of long-acting reversible contraceptives (LARC) with the study variables. Results: The mean age (SD) of the clients was 25.7 years. The median number of living children was 2 children and that of pregnancies carried per client was 3. Three (3) clients under the age of 20 out of 126 (2.4%) have 3 to 4 living children and one a up to 6 living children. Out of a total of 705 clients, 11.1% aged under 20 and 39.1% of clients aged 20 to 24 requested LARC. Divorced and unmarried women chose SAC and married and common-law women chose LARC more, compared to other categories of women. Unemployed women prefer SACs more than other professional categories, and women farmers prefer LARC. The level of education has no influence on the choice of method. The use of LARC increased with the number of pregnancies carried, children alive, and children who died. The age and number of children who died did not influence the association between LARC and alive children. Conclusion: The choice of modern contraceptive methods is guided by the age of the mother and the number of children living in her life. Younger women are more likely to choose short-acting contraceptive methods in the eight health zones of Kongo Central province. The high number of living children influences the choice of LARC regardless of age.展开更多
Internet of Things(IoT)applications can be found in various industry areas,including critical infrastructure and healthcare,and IoT is one of several technological developments.As a result,tens of billions or possibly...Internet of Things(IoT)applications can be found in various industry areas,including critical infrastructure and healthcare,and IoT is one of several technological developments.As a result,tens of billions or possibly hundreds of billions of devices will be linked together.These smart devices will be able to gather data,process it,and even come to decisions on their own.Security is the most essential thing in these situations.In IoT infrastructure,authenticated key exchange systems are crucial for preserving client and data privacy and guaranteeing the security of data-in-transit(e.g.,via client identification and provision of secure communication).It is still challenging to create secure,authenticated key exchange techniques.The majority of the early authenticated key agreement procedure depended on computationally expensive and resource-intensive pairing,hashing,or modular exponentiation processes.The focus of this paper is to propose an efficient three-party authenticated key exchange procedure(AKEP)using Chebyshev chaotic maps with client anonymity that solves all the problems mentioned above.The proposed three-party AKEP is protected from several attacks.The proposed three-party AKEP can be used in practice for mobile communications and pervasive computing applications,according to statistical experiments and low processing costs.To protect client identification when transferring data over an insecure public network,our three-party AKEP may also offer client anonymity.Finally,the presented procedure offers better security features than the procedures currently available in the literature.展开更多
文摘Objective: This study aims to use reflective theory and critical emancipatory theory to explore nurses' communicative role with unsatisfied clients.Methods: This paper begins with the broad issue, and the analysis will engage Smyth's cycle, which includes describing, analyzing,exploring, and reconstructing.Results: Critical emancipatory reflection is essential to make changes in the professional practice of nursing, because it is of primary importance for the professional learning and development of a nurse.Conclusions: Critical emancipatory reflection helps a nurse to analyze the constraints, including historical, sociocultural, political, and personal aspects.
文摘This paper examines whether truckers have been over-stigmatized as HIV carriers in the country. Data were taken from cross-sectional surveys of clients of female sex workers conducted in 2006-2007 in 12 districts of the country. A total 4822 clients of female sex workers were covered in the survey. Low-income skilled/semi-skilled men, including non-agricultural/casual labor, and petty businessmen/small shop owners, have the largest share in the clients’ population. There was no significant difference between truckers and other sub-group of clients’ population in terms of consistent condom use with female sex workers and prevalence of HIV or STI. These evidences suggest that the contribution of truckers in HIV epidemic in India might to similar to other sub-groups of clients’ population. Thus, truckers might have been over-stigmatized as HIV carriers in the country. However, there is no doubt that truckers constitute an extremely important target group for the HIV prevention programs and these efforts must be continued to prevent new HIV infections in the country.
文摘Background: The Anonymous Screening and Information Centre (CADI) is the oldest screening centre of HIV from Burkina Faso. Since its opening, no analysis on the evolution of Human Immunodeficiency Virus (HIV) prevalence has been carried out. Objective: The study aimed to describe the dynamics of HIV infection when managing centres offering voluntary counselling and testing to client, such as the Screening and Counselling Centre (CADI), in Bobo Dioulasso, Burkina Faso. Patients and Methods: A cross-sectional study was performed including people screened at the CADI from May 1996 to June 2014. Pearson khi2 test and Cuzick trend test were used with a 5% significance level. Results: From 7.1% of the 11,451 cases analyzed, the average age of clients screened was 30 ± 10.83 year-old. There was a female predominance (sex ratio = 0.8). The 16.4% (15.7 - 17.1) of the cases from the 11,451 clients included in our study were tested HIV positive. The global prevalence rate of HIV in the centre has significantly decreased from 46.2% in 1996 to 1.5% in 2014 (p Conclusion: The behaviour change could be a justification for the decline in HIV prevalence at the centre, hence the importance of sensitization campaigns.
文摘<strong>Background</strong>: The aim at this study is to establish the effectiveness of case management (CM) compared to care as usual (CAU) in patients with schizophrenia. <strong>Methods</strong>: 128 patients with schizophrenia were recruited from the community of Haidian District (Beijing, China), 68 patients in the CM group and 60 patients in the CAU group. Efficacy and safety information were assessed at one year follow-up. The relapse rate was similar in both groups after 12 months followed up (7% and 5%). The withdraw rate was significant lower in CM group compared with CAU group (10% and 36%). <strong>Results</strong>: There is no significant difference in PANSS, PSP and SSMI score between 2 groups at each visit. Between endpoint and baseline, there is a significant improvement on PANSS negative score and PSP in patients treated with CM, while CAU group was not significantly changed. <strong>Conclusions</strong>: There is a possible effectiveness of CM group of improving negative symptoms and social function in schizophrenia clients.
文摘Aim: Client perception was important to indicate points requiring interventions or adjustments and to permit refinement of the services offered. This study aimed to determine the perception of internal clients regarding the quality of the service after integrating these items into the system of electronic prescription. Methods: We applied a questionnaire elaborated based on the SERVQUAL about the five dimensions of service quality (tangibility, reliability, responsiveness, safety, and empathy) with adaptation of the four-point Likert scale, ranging from “I fully disagree” to “I fully agree”. Results: The instrument was applied to 138 professionals, with a 56% return. Analysis revealed that the strong points were related to tangibility, safety and empathy, while the aspects related to reliability showed a lower score regarding time of delivery, occurrences and waste, and those related to responsiveness showed a lower score regarding service to be provided in a timely manner. The Cronbach Alpha Coefficient indicated that the investigation had a high degree of consistency and that the results could be considered reliable. Conclusion: Application of the adapted SERVQUAL questionnaire revealed that the perception of internal clients about the five quality dimensions after the changes made and provided valuable information for the scoring of aspects that still needed adjustment to improve interventions.
基金supported by the National Natural Science Foundation of China(Grant No.61762033)Hainan Provincial Natural Science Foundation of China(Grant Nos.2019RC041 and 2019RC098)+2 种基金Opening Project of Shanghai Trusted Industrial Control Platform(Grant No.TICPSH202003005-ZC)Ministry of Education Humanities and Social Sciences Research Program Fund Project(Grant No.19YJA710010)Zhejiang Public Welfare Technology Research(Grant No.LGF18F020019).
文摘Nowadays,as lightweight mobile clients become more powerful and widely used,more and more information is stored on lightweight mobile clients,user sensitive data privacy protection has become an urgent concern and problem to be solved.There has been a corresponding rise of security solutions proposed by researchers,however,the current security mechanisms on lightweight mobile clients are proven to be fragile.Due to the fact that this research field is immature and still unexplored in-depth,with this paper,we aim to provide a structured and comprehensive study on privacy protection using trusted execution environment(TEE)for lightweight mobile clients.This paper presents a highly effective and secure lightweight mobile client privacy protection system that utilizes TEE to provide a new method for privacy protection.In particular,the prototype of Lightweight Mobile Clients Privacy Protection Using Trusted Execution Environments(LMCPTEE)is built using Intel software guard extensions(SGX)because SGX can guarantee the integrity,confidentiality,and authenticity of private data.By putting lightweight mobile client critical data on SGX,the security and privacy of client data can be greatly improved.We design the authentication mechanism and privacy protection strategy based on SGX to achieve hardware-enhanced data protection and make a trusted connection with the lightweight mobile clients,thus build the distributed trusted system architecture.The experiment demonstrates that without relying on the performance of the blockchain,the LMCPTEE is practical,feasible,low-performance overhead.It can guarantee the privacy and security of lightweight mobile client private data.
文摘<strong>Background:</strong> Client satisfaction is considered as one of the desired outcomes of health care service delivery and it is directly related to the utilization of any health services. The family planning clinic remains one of the important health care delivery outlets where client satisfaction guarantees continuation of usage, hence this study. <strong>Objective: </strong>The objective of this study is to assess the determinants of client satisfaction with the family planning (FP) services provided in Port Harcourt. <strong>Materials and methods: </strong>This was a descriptive prospective cross-sectional study conducted between 18th of June 2018 and 18th of July 2018. The target population is women of reproductive age group (15 - 49) who visited 11 randomly selected family planning health facilities in Port Harcourt during the study period. A set of exit interviewer-administered questionnaire (pretested for reliability and validity) was used for data collection from a sample size of 195 respondents;and analyzed using SPSS 22.0. Standard deviation was used for continuous variable while categorical variables were presented in simple percentages and frequencies. The P value was set at <0.05 and confidence interval was 95%. <strong>Results: </strong>Age range 30 - 39 years constituted the largest proportion of 51.3%. A large proportion of the women (87.2%) expressed satisfaction with FP services provided. All respondents said the facilities were easily accessible, clean and were treated respectfully. However, only about half of the clients (51.3%) received their chosen contraceptive product after 1 hour. <strong>Conclusion: </strong>A huge proportion of family planning clients expressed satisfaction with family planning service delivery in Port Harcourt;not minding the longer waiting time. Implication of this is continued use and by implication improved contraceptive prevalence.
基金supported by Key Research and Development Program of China (No.2022YFC3005401)Key Research and Development Program of Yunnan Province,China (Nos.202203AA080009,202202AF080003)+1 种基金Science and Technology Achievement Transformation Program of Jiangsu Province,China (BA2021002)Fundamental Research Funds for the Central Universities (Nos.B220203006,B210203024).
文摘Data sharing and privacy protection are made possible by federated learning,which allows for continuous model parameter sharing between several clients and a central server.Multiple reliable and high-quality clients must participate in practical applications for the federated learning global model to be accurate,but because the clients are independent,the central server cannot fully control their behavior.The central server has no way of knowing the correctness of the model parameters provided by each client in this round,so clients may purposefully or unwittingly submit anomalous data,leading to abnormal behavior,such as becoming malicious attackers or defective clients.To reduce their negative consequences,it is crucial to quickly detect these abnormalities and incentivize them.In this paper,we propose a Federated Learning framework for Detecting and Incentivizing Abnormal Clients(FL-DIAC)to accomplish efficient and security federated learning.We build a detector that introduces an auto-encoder for anomaly detection and use it to perform anomaly identification and prevent the involvement of abnormal clients,in particular for the anomaly client detection problem.Among them,before the model parameters are input to the detector,we propose a Fourier transform-based anomaly data detectionmethod for dimensionality reduction in order to reduce the computational complexity.Additionally,we create a credit scorebased incentive structure to encourage clients to participate in training in order tomake clients actively participate.Three training models(CNN,MLP,and ResNet-18)and three datasets(MNIST,Fashion MNIST,and CIFAR-10)have been used in experiments.According to theoretical analysis and experimental findings,the FL-DIAC is superior to other federated learning schemes of the same type in terms of effectiveness.
基金the Arab Open University for Funding this work through AOU Research Fund No.(AOURG-2023-006).
文摘This work carried out a measurement study of the Ethereum Peer-to-Peer(P2P)network to gain a better understanding of the underlying nodes.Ethereum was applied because it pioneered distributed applications,smart contracts,and Web3.Moreover,its application layer language“Solidity”is widely used in smart contracts across different public and private blockchains.To this end,we wrote a new Ethereum client based on Geth to collect Ethereum node information.Moreover,various web scrapers have been written to collect nodes’historical data fromthe Internet Archive and the Wayback Machine project.The collected data has been compared with two other services that harvest the number of Ethereumnodes.Ourmethod has collectedmore than 30% more than the other services.The data trained a neural network model regarding time series to predict the number of online nodes in the future.Our findings show that there are less than 20% of the same nodes daily,indicating thatmost nodes in the network change frequently.It poses a question of the stability of the network.Furthermore,historical data shows that the top ten countries with Ethereum clients have not changed since 2016.The popular operating system of the underlying nodes has shifted from Windows to Linux over time,increasing node security.The results have also shown that the number of Middle East and North Africa(MENA)Ethereum nodes is neglected compared with nodes recorded from other regions.It opens the door for developing new mechanisms to encourage users from these regions to contribute to this technology.Finally,the model has been trained and demonstrated an accuracy of 92% in predicting the future number of nodes in the Ethereum network.
文摘Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing, including the Beijing Urban Map, Beijing Subway System layout and Beijing Suburban Scenic Spots. The map also shows the exact locations of
文摘Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijing, including the Beijing Urban Map, Beijing Subway System layout and Beijing Suburban Scenic Spots. The map also shows the exact locations of
文摘Beijing Tourist Map (Chinese and English) A handy guide to getting around the city, the content of Beijing Tourist Map is regularly updated. Information will be in line with changes to public transportation in Beijinq, including the Beijing Urban Map, Beijing Subway System lay- out and Beijing Suburban Scenic Spots. The map also shows the exact locations of Beijinq city scenic spots, food and entertainment venues special streets and shopping areas.
文摘LOCATED at the corner of Yong’an Street near Tianqiao in south Beijing is an exquisite three-storey white building with upturned eaves, a plain but graceful facade with a hint of the antique. As patrons enter and climb the stairs they catch sight of framed paintings that line the walls along the staircase
文摘HAO Huizhen cannot forget the joy she felt winning her first lawsuit dealing with a transnational marriage case. The court decided that Hao’s litigant voluntarily offered his ex-wife ￥5,000. The first trial was announced effective because the defendant didn’t lodge an appeal. Hao carefully researched the economic conditions of both sides and collected 18 pieces of evidence. Based on this evidence, she put forth a 15,000-character statement for the plaintiff which won the decision of the court. The plaintiff, a man from another country, did not have to pay his estranged wife ￥300,000 she had demanded. Settling this first transnational marriage court case increased Hao’s confidence in herself. As a result,
基金partially supported by the National Key Research and Development Program of China(No.2018YFC0832101)the National Natural Science Foundation of China(Nos.71802068,61922073,and U20A20229)+1 种基金the financial supports of Tianjin University(No.2020XSC-0019)the support of USTC-CMB Joint Laboratory of Artificial Intelligence
文摘Intelligent Financial Advisors(IFAs)in online financial applications(apps)have brought new life to personal investment by providing appropriate and high-quality portfolios for users.In real-world scenarios,identifying potential clients is a crucial issue for IFAs,i.e.,identifying users who are willing to purchase the portfolios.Thus,extracting useful information from various characteristics of users and further predicting their purchase inclination are urgent.However,two critical problems encountered in real practice make this prediction task challenging,i.e.,sample selection bias and data sparsity.In this study,we formalize a potential conversion relationship,i.e.,user→activated user→client and decompose this relationship into three related tasks.Then,we propose a Multitask Feature Extraction Model(MFEM),which can leverage useful information contained in these related tasks and learn them jointly,thereby solving the two problems simultaneously.In addition,we design a two-stage feature selection algorithm to select highly relevant user features efficiently and accurately from an incredibly huge number of user feature fields.Finally,we conduct extensive experiments on a real-world dataset provided by a famous fintech bank.Experimental results clearly demonstrate the effectiveness of MFEM.
文摘Background: In developing countries, access to modern contraceptive methods remains a concern, particularly in Sub-Saharan Africa (SSA). Although satisfactory progress in increasing family planning use has been observed worldwide, demand and unmet need continue to grow. This study describes the different reasons that push women in rural and urban areas of Kongo Central province in the Democratic Republic of Congo (DRC) to choose one of the modern contraceptive methods. Methods: A cross-sectional, analytical study on the 705 clients recruited during the family planning mini-campaigns organized from January to March 2021 in 8 health zones of the Kongo Central Province in DRC. Community Contraceptive Methods Distributors (CCMD) collected the data, community health workers (CHW) trained in clinical providers’ community family planning service. The Pearson’s Chi<sup>2</sup> test was used to compare the proportions of the methods chosen in the different study variables categories, and logistic regression was done to analyze the strength of association between the uses of long-acting reversible contraceptives (LARC) with the study variables. Results: The mean age (SD) of the clients was 25.7 years. The median number of living children was 2 children and that of pregnancies carried per client was 3. Three (3) clients under the age of 20 out of 126 (2.4%) have 3 to 4 living children and one a up to 6 living children. Out of a total of 705 clients, 11.1% aged under 20 and 39.1% of clients aged 20 to 24 requested LARC. Divorced and unmarried women chose SAC and married and common-law women chose LARC more, compared to other categories of women. Unemployed women prefer SACs more than other professional categories, and women farmers prefer LARC. The level of education has no influence on the choice of method. The use of LARC increased with the number of pregnancies carried, children alive, and children who died. The age and number of children who died did not influence the association between LARC and alive children. Conclusion: The choice of modern contraceptive methods is guided by the age of the mother and the number of children living in her life. Younger women are more likely to choose short-acting contraceptive methods in the eight health zones of Kongo Central province. The high number of living children influences the choice of LARC regardless of age.
文摘Internet of Things(IoT)applications can be found in various industry areas,including critical infrastructure and healthcare,and IoT is one of several technological developments.As a result,tens of billions or possibly hundreds of billions of devices will be linked together.These smart devices will be able to gather data,process it,and even come to decisions on their own.Security is the most essential thing in these situations.In IoT infrastructure,authenticated key exchange systems are crucial for preserving client and data privacy and guaranteeing the security of data-in-transit(e.g.,via client identification and provision of secure communication).It is still challenging to create secure,authenticated key exchange techniques.The majority of the early authenticated key agreement procedure depended on computationally expensive and resource-intensive pairing,hashing,or modular exponentiation processes.The focus of this paper is to propose an efficient three-party authenticated key exchange procedure(AKEP)using Chebyshev chaotic maps with client anonymity that solves all the problems mentioned above.The proposed three-party AKEP is protected from several attacks.The proposed three-party AKEP can be used in practice for mobile communications and pervasive computing applications,according to statistical experiments and low processing costs.To protect client identification when transferring data over an insecure public network,our three-party AKEP may also offer client anonymity.Finally,the presented procedure offers better security features than the procedures currently available in the literature.
