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Attention-relation network for mobile phone screen defect classification via a few samples 被引量:1
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作者 Jiao Mao Guoliang Xu +1 位作者 Lijun He Jiangtao Luo 《Digital Communications and Networks》 SCIE CSCD 2024年第4期1113-1120,共8页
How to use a few defect samples to complete the defect classification is a key challenge in the production of mobile phone screens.An attention-relation network for the mobile phone screen defect classification is pro... How to use a few defect samples to complete the defect classification is a key challenge in the production of mobile phone screens.An attention-relation network for the mobile phone screen defect classification is proposed in this paper.The architecture of the attention-relation network contains two modules:a feature extract module and a feature metric module.Different from other few-shot models,an attention mechanism is applied to metric learning in our model to measure the distance between features,so as to pay attention to the correlation between features and suppress unwanted information.Besides,we combine dilated convolution and skip connection to extract more feature information for follow-up processing.We validate attention-relation network on the mobile phone screen defect dataset.The experimental results show that the classification accuracy of the attentionrelation network is 0.9486 under the 5-way 1-shot training strategy and 0.9039 under the 5-way 5-shot setting.It achieves the excellent effect of classification for mobile phone screen defects and outperforms with dominant advantages. 展开更多
关键词 mobile phone screen defects A few samples Relation network Attention mechanism Dilated convolution
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A Problem Not to Be Ignored: The Influencing Factors of Mobile Phone Addiction and Its Influence on Sleep Quality
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作者 Zihan Ji Lian Zhou 《Health》 2024年第5期459-469,共11页
Background and Objective: With the popularity and widespread use of mobile phones, the effects of mobile phone dependence and addiction on individuals’ physical and mental health have attracted more and more attentio... Background and Objective: With the popularity and widespread use of mobile phones, the effects of mobile phone dependence and addiction on individuals’ physical and mental health have attracted more and more attention. The present study aims to analyze the current state of mobile phone addiction and its impact on sleep quality within the population, while also exploring the influence of related factors on sleep quality. Ultimately, this research will provide a scientific foundation for targeted intervention measures and strategies. Methods: A total of 253 permanent residents in Nanjing were randomly selected as study subjects. The Mobile Phone Addiction Index (MPAI) and Pittsburgh Sleep Quality Index (PSQI) were used to evaluate the degree of smartphone addiction and sleep quality of the study subjects. Body mass index (BMI) was measured according to standardized procedures. Independent sample t-test, Chi-square test, rank sum test and multiple linear regression were used to analyze the correlation between mobile phone addiction and sleep quality, and P Results: 117 people (46.2%) were addicted to mobile phones. Chi-square test showed that the rate of mobile phone addiction in drinking group was significantly higher than that in non-drinking group (P P P P P P P P P P Conclusion: Mobile phone addiction may lead to shorter sleep duration and reduce sleep efficiency. The withdrawal of mobile phone addiction may have a negative impact on sleep quality. According to the characteristics of the population, appropriate comprehensive intervention measures should be taken to build an effective evaluation system, so as to reduce the impact of mobile phone addiction and withdrawal problems on sleep and improve sleep quality. 展开更多
关键词 mobile phone Addiction Influencing Factors WITHDRAWAL Sleep Quality
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Prediction of Traffic Volume of Motor Vehicles Based on Mobile Phone Signaling Technology
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作者 Jin Shang Hailong Su +2 位作者 Kai Hu Xin Guo Defa Sun 《Computers, Materials & Continua》 SCIE EI 2023年第4期799-814,共16页
Urban traffic volume detection is an essential part of trafficplanning in terms of urban planning in China. To improve the statisticsefficiency of road traffic volume, this thesis proposes a method for predictingmotor... Urban traffic volume detection is an essential part of trafficplanning in terms of urban planning in China. To improve the statisticsefficiency of road traffic volume, this thesis proposes a method for predictingmotor vehicle traffic volume on urban roads in small and medium-sizedcities during the traffic peak hour by using mobile signal technology. Themethod is verified through simulation experiments, and the limitations andthe improvement methods are discussed. This research can be divided intothree parts: Firstly, the traffic patterns of small and medium-sized cities areobtained through a questionnaire survey. A total of 19745 residents weresurveyed in Luohe, a medium-sized city in China and five travel modes oflocal people were obtained. Secondly, after the characteristics of residents’rest and working time are investigated, a method is proposed in this studyfor the distribution of urban residential and working places based on mobilephone signaling technology. Finally, methods for predicting traffic volume ofthese travel modes are proposed after the characteristics of these travel modesand methods for the distribution of urban residential and working placesare analyzed. Based on the actual traffic volume data observed at offlineintersections, the project team takes Luohe city as the research object and itverifies the accuracy of the prediction method by comparing the predictiondata. The prediction simulation results of traffic volume show that the averageerror rate of traffic volume is unstable. The error rate ranges from 10% to 30%.In this thesis, simulation experiments and field investigations are adopted toanalyze why these errors occur. 展开更多
关键词 Traffic planning prediction of traffic volume mobile phone signaling technology small and medium-sized cities traffic peak hour
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Level of Insomnia, Symptoms of Depression, and Anxiety among College Students with Mobile Phone Addiction: Basis for Guidance and Counseling Program Enhancement
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作者 Xiaowei He Elna Lopez 《Open Journal of Applied Sciences》 2023年第10期1641-1648,共8页
Mobile phone addiction is a growing concern among college students, with significant implications for their mental health. This study examines the complex relationship between mobile phone addiction and its impact on ... Mobile phone addiction is a growing concern among college students, with significant implications for their mental health. This study examines the complex relationship between mobile phone addiction and its impact on college students’ insomnia, symptoms of depression, and anxiety. A sample of 399 college students from traditional Chinese medicine colleges in Guangxi, China, completed the Mobile Phone Addiction Tendency Scale questionnaire. Among them, 155 students with high Mobile Phone Addiction Tendency scores were selected for the correlation study. The analysis revealed a strong association between mobile phone addiction and insomnia. Furthermore, mobile phone addiction was significantly associated with symptoms of depression, including feelings of sadness, worthlessness, and hopelessness, as well as heightened anxiety symptoms, such as excessive worry and restlessness. These findings emphasized the importance of targeted interventions and preventive measures to address the negative impact of mobile phone addiction on college students’ mental health. 展开更多
关键词 College Students mobile phone Addiction INSOMNIA Symptoms of Depression ANXIETY Mental Health Intervention Program
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Multifactorial study of mobile phone dependence in medical students: Relationship to health-related lifestyle, Type A behavior, and depressive state 被引量:8
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作者 Masahiro Toda Satoko Ezoe 《Open Journal of Preventive Medicine》 2013年第1期99-103,共5页
We investigated factors contributing to mobile phone dependence. To 139 medical students, we administered a self-reporting questionnaire designed to evaluate mobile phone dependence, health-related lifestyle, patterns... We investigated factors contributing to mobile phone dependence. To 139 medical students, we administered a self-reporting questionnaire designed to evaluate mobile phone dependence, health-related lifestyle, patterns of behavior, and depressive state. Multivariate logistic regression analysis revealed that scores for poor health-related lifestyle, Type A behavior pattern, and presence of depression are independently associated with degree of mobile phone dependency. These findings suggest that persons with an unhealthy lifestyle, Type A behavior traits, or depression might benefit from mobile phone use guidance. 展开更多
关键词 mobile phone DEPENDENCE HEALTH-RELATED LIFESTYLE Patterns of Behavior DEPRESSIVE State Medical Students
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Relationships of loneliness and mobile phone dependence with Internet addiction in Japanese medical students 被引量:7
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作者 Satoko Ezoe Masahiro Toda 《Open Journal of Preventive Medicine》 2013年第6期407-412,共6页
We investigated factors contributing to Internet addiction in 105 Japanese medical students. The subjects were administered by a self-reporting questionnaire designed to evaluate demographic factors, Internet addictio... We investigated factors contributing to Internet addiction in 105 Japanese medical students. The subjects were administered by a self-reporting questionnaire designed to evaluate demographic factors, Internet addiction, loneliness, health-related lifestyle factors, depressive state, patterns of behavior, and mobile phone dependence. Results of multivariate logistic regression analysis indicated that loneliness and mobile phone dependence were positively related to degree of addiction. Our findings suggest that Internet addiction is associated with loneliness and mobile phone dependence in Japanese students. 展开更多
关键词 Internet ADDICTION mobile phone Dependence LONELINESS DEPRESSION Medical Students
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Empowering fall webworm surveillance with mobile phone-based community monitoring: a case study in northern China 被引量:4
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作者 Chengbo Wang Yanyou Qiao +2 位作者 Honggan Wu Yuanfei Chang Muyao Shi 《Journal of Forestry Research》 SCIE CAS CSCD 2016年第6期1407-1410,共4页
Recent advances in information and communication technologies, such as mobile Internet and smart- phones, have created new paradigms for participatory environment monitoring. The ubiquitous mobile phones with capabili... Recent advances in information and communication technologies, such as mobile Internet and smart- phones, have created new paradigms for participatory environment monitoring. The ubiquitous mobile phones with capabilities such as a global positioning system, camera, and network access, offer opportunities to estab- lish distributed monitoring networks that can perform a wide range of measurements for a landscape. This study examined the potential of mobile phone-based community monitoring of fall webworm (Hyphantria cunea Drury). We built a prototype of a participatory fall webworm monitoring System based on mobile devices that stream- lined data collection, transmission, and visualization. We also assessed the accuracy and reliability of the data collected by the local community. The system performance was evaluated at the Ziya commune of Tianjin municipality in northern China, where fall webworm infestation has occurred. The local community provided data with accuracy comparable to expert measurements (Willmott's index of agreement 〉0.85). Measurements by the local community effectively complemented remote sensing images in both temporal and spatial resolution. 展开更多
关键词 Forest pest monitoring mobile phone Community monitoring Hyphantria cunea Drury Field survey
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Assessment of toxicity potential of metallic elements in discarded electronics:A case study of mobile phones in China 被引量:3
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作者 A.Middendorf 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2008年第11期1403-1408,共6页
The electronic waste (e-waste) is increasingly flooding Asia,especially China.E-waste could precipitate a growing volume of toxic input to the local environment if it was not handed properly.This makes the evaluation ... The electronic waste (e-waste) is increasingly flooding Asia,especially China.E-waste could precipitate a growing volume of toxic input to the local environment if it was not handed properly.This makes the evaluation of environmental impact from electronics an essentially important task for the life cycle assessment (LCA) and the end-of-life management of electronic products.This study presented a quantitative investigation on the environmental performance of typical electronics.Two types of disposed mobile... 展开更多
关键词 E-WASTE enviromental impact toxicity potential indicator (TPI) mobile phones (MPs)
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Exploring Temporal Activity Patterns of Urban Areas Using Aggregated Network-driven Mobile Phone Data:A Case Study of Wuhu,China 被引量:3
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作者 ZHANG Shanqi YANG Yu +1 位作者 ZHEN Feng LOBSANG Tashi 《Chinese Geographical Science》 SCIE CSCD 2020年第4期695-709,共15页
The increasing availability of data in the urban context(e.g.,mobile phone,smart card and social media data)allows us to study urban dynamics at much finer temporal resolutions(e.g.,diurnal urban dynamics).Mobile phon... The increasing availability of data in the urban context(e.g.,mobile phone,smart card and social media data)allows us to study urban dynamics at much finer temporal resolutions(e.g.,diurnal urban dynamics).Mobile phone data,for instance,are found to be a useful data source for extracting diurnal human mobility patterns and for understanding urban dynamics.While previous studies often use call detail record(CDR)data,this study deploys aggregated network-driven mobile phone data that may reveal human mobility patterns more comprehensively and can mitigate some of the privacy concerns raised by mobile phone data usage.We first propose an analytical framework for characterizing and classifying urban areas based on their temporal activity patterns extracted from mobile phone data.Specifically,urban areas’diurnal spatiotemporal signatures of human mobility patterns are obtained through longitudinal mobile phone data.Urban areas are then classified based on the obtained signatures.The classification provides insights into city planning and development.Using the proposed framework,a case study was implemented in the city of Wuhu,China to understand its urban dynamics.The empirical study suggests that human activities in the city of Wuhu are highly concentrated at the Traffic Analysis Zone(TAZ)level.This large portion of local activities suggests that development and planning strategies that are different from those used by metropolitan Chinese cities should be applied in the city of Wuhu.This article concludes with discussions on several common challenges associated with using network-driven mobile phone data,which should be addressed in future studies. 展开更多
关键词 mobile phone data human mobility urban travel patterns prefectural-level Chinese city Wuhu
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Building a Platform to Bridge Low End Mobile Phones and Cloud Computing Services 被引量:2
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作者 Fung Po Tso 《ZTE Communications》 2011年第1期22-26,共5页
Two waves of technology are dramatically changing daily life: cloud computing and mobile phones. New cloud computing services such as webmail and content rich data search have emerged. However, in order to use these ... Two waves of technology are dramatically changing daily life: cloud computing and mobile phones. New cloud computing services such as webmail and content rich data search have emerged. However, in order to use these services, a mobile phone must be able to run new applications and handle high network bandwidth. Worldwide, about 3.45 billion mobile phones are low end phones; they have low bandwidth and cannot run new applications. Because of this technology gap, most mobile users are unable to experience cloud computing services with their thumbs. In this paper, a novel platform, Thumb-in-Cloud, is proposed to bridge this gap. Thumb-in-Cloud consists of two subsystems: Thumb-Machine and Thumb-Gateways. Thumb-Machine is a virtual machine built into a low end phone to enable it to run new applications. Thumb-Gateways can tailor cloud computing services by reformatting and compressing the service to fit the phone ' s profile. 展开更多
关键词 mobile cloud computing low end mobile phone mobile OS MIDDLEWARE
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Real-Time Urban Traffic State Estimation with A-GPS Mobile Phones as Probes 被引量:2
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作者 Sha Tao Vasileios Manolopoulos +1 位作者 Saul Rodriguez Ana Rusu 《Journal of Transportation Technologies》 2012年第1期22-31,共10页
This paper presents a microscopic traffic simulation-based method for urban traffic state estimation using Assisted Global Positioning System (A-GPS) mobile phones. In this approach, real-time location data are collec... This paper presents a microscopic traffic simulation-based method for urban traffic state estimation using Assisted Global Positioning System (A-GPS) mobile phones. In this approach, real-time location data are collected by A-GPS mobile phones to track vehicles traveling on urban roads. In addition, tracking data obtained from individual mobile probes are aggregated to provide estimations of average road link speeds along rolling time periods. Moreover, the estimated average speeds are classified to different traffic condition levels, which are prepared for displaying a real-time traffic map on mobile phones. Simulation results demonstrate the effectiveness of the proposed method, which are fundamental for the subsequent development of a system demonstrator. 展开更多
关键词 TRAFFIC STATE Estimation A-GPS mobile phones MICROSCOPIC TRAFFIC Simulation mobile TRACKING
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Inspections of Mobile Phone Microwaves Effects on Proteins Secondary Structure by Means of Fourier Transform Infrared Spectroscopy 被引量:2
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作者 Emanuele Calabrò Salvatore Magazù 《Journal of Electromagnetic Analysis and Applications》 2010年第11期607-617,共11页
In this study the effects of microwaves on the secondary structure of three typical proteins have been investigated. A set of samples of lysozyme, bovine serum albumin and myoglobin in D2O solutions were exposed for 8... In this study the effects of microwaves on the secondary structure of three typical proteins have been investigated. A set of samples of lysozyme, bovine serum albumin and myoglobin in D2O solutions were exposed for 8 hours to mobile phone microwaves at 900 MHz at a magnetic field intensity around 16 mA/m. The relative effects on the secondary structure of the proteins were studied by means of Fourier Transform Infrared Spectroscopy. An increase of the amide I band intensity in the secondary structure of the proteins was observed after the microwaves exposure. Furthermore, a weak shift of the amide I mode of bovine serum albumin and a heavier shift of the amide I of myoglobin occurred after the exposure. In addition, a clear increasing of the β-sheet components with respect to the α-helix content was observed in the spectra of bovine serum albumin and myoglobin after the exposure, suggesting the hypothesis of the formation of aggregates. 展开更多
关键词 mobile phone Microwaves PROTEIN Infrared SPECTRUM SECONDARY Structure AMIDE I
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Potential Impact of Mobile Phone Charger Standardization in China 被引量:1
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作者 张静 梁雄健 《China Communications》 SCIE CSCD 2011年第7期136-143,共8页
The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in... The standardization of mobile phone charger is proceeding steadily in Europe. This paper makes a quantitative analysis on the potential impact of this move in China. The demands for mobile handset and phone charger in China after the introduction of standardization are predicted based on Bass diffusion model. The results indicate that the standardization would have little influence on mobile phone producers, but may charger makers face a fierce turbulence. Standardization would not only reduce the size of charger market, but also change the stable demand to a fluctuating pattern. Standardization of mobile phone charger can contribute to green economy greatly and provide the ICT industry a directive signal for green innovation in the future. Finally, suggestions for policy makers are provided based on the analysis. 展开更多
关键词 mobile phone universal charging solution Bass model STANDARDIZATION
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Web-based GIS System for Real-time Field Data Collection Using Personal Mobile Phone 被引量:2
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作者 Ko Ko Lwin Yuji Murayama 《Journal of Geographic Information System》 2011年第4期382-389,共8页
Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accura... Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accurate timely and handy field data collection is required for disaster management and emergency quick responses. In this article, we introduce web-based GIS system to collect the field data by personal mobile phone through Post Office Protocol POP3 mail server. The main objective of this work is to demonstrate real-time field data collection method to the students using their mobile phone to collect field data by timely and handy manners, either individual or group survey in local or global scale research. 展开更多
关键词 WEB-BASED GIS System REAL-TIME Field Data Collection PERSONAL mobile phone POP3 MAIL Server
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Awareness of mobile phone hazards among university students in a Malaysian medical school 被引量:1
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作者 Latha Rajendra Kumar Kiu Dawn Chii +2 位作者 Lye Chuan Way Yogeeta Jetly Veena Rajendaran 《Health》 2011年第7期406-415,共10页
This paper seeks to examine the awareness of potential health hazards by using mobile phone among AIMST (Asian Institute of Medical science and technology) University students. This is a cross-sectional survey conduct... This paper seeks to examine the awareness of potential health hazards by using mobile phone among AIMST (Asian Institute of Medical science and technology) University students. This is a cross-sectional survey conducted by distributing ‘perception questionnaire’. Perception of health hazards and outcomes were compared by gender, age, course of study, preferred ear, number of calls and SMS daily, the brand of mobile phone and use of mobile phone accessory (Bluetooth and hands free). The overall perception of mobile phone hazard in AIMST university student was 62%.Most subjects agreed that mobile phone usage can cause headache, loss of mental attention and sleeping disturbances and most disagree that mobile phone usage can cause constipation and diarrhea. Out of the 124 subjects who were aware of the side effects, 5% of the males and 10% of the females felt that there was no need to minimize the unwanted effects. The paper is useful to the general population particularly to the students as the perceived health risk did not significantly deter students from using mobile phone. The reasons given by students for the continued usage of mobile phone in spite of their awareness of the associated hazards have been discussed. This study offers new insight into level of awareness and perception of mobile phone hazard among University students. 展开更多
关键词 mobile phone Hazards PERCEPTION QUESTIONNAIRE University Students
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Adaptive and Dynamic Mobile Phone Data Encryption Method 被引量:1
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作者 CAO Wanpeng BI Wei 《China Communications》 SCIE CSCD 2014年第1期103-109,共7页
To enhance the security of user data in the clouds,we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded.Firstly,the adopted data encryption algorithm... To enhance the security of user data in the clouds,we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded.Firstly,the adopted data encryption algorithm is not static and uniform.For each encryption,this algorithm is adaptively and dynamically selected from the algorithm set in the mobile phone encryption system.From the mobile phone's character,the detail encryption algorithm selection strategy is confirmed based on the user's mobile phone hardware information,personalization information and a pseudo-random number.Secondly,the data is rearranged with a randomly selected start position in the data before being encrypted.The start position's randomness makes the mobile phone data encryption safer.Thirdly,the rearranged data is encrypted by the selected algorithm and generated key.Finally,the analysis shows this method possesses the higher security because the more dynamics and randomness are adaptively added into the encryption process. 展开更多
关键词 data encryption mobile phone cloud storage pseudo-random number
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Three-stage Nonlinear Thermal Model for Microspeakers in Mobile Phones 被引量:1
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作者 Zhiliang Zhang Yong Shen +1 位作者 Jie Xia Yuchen Shen 《Sound & Vibration》 2018年第5期28-33,共6页
Since microspeakers are widely used in mobile phones,high power is usually applied to obtain sufficient output sound pressure.However,the electric power is almost converted into heat,leading to the thermal problem in ... Since microspeakers are widely used in mobile phones,high power is usually applied to obtain sufficient output sound pressure.However,the electric power is almost converted into heat,leading to the thermal problem in microspeakers.Compared with large loudspeaker,microspeakers are smaller and the under yoke is relatively closed,causing the heat transfer more complex.In this study,a three-stage nonlinear thermal model was proposed for analyzing the thermal behavior in microspeakers.The inside air is a buffer area between the voice coil and magnet,and modeled as a middle stage of the heat transfer.The forced convection is still significant in microspeakers while the eddy current can be ignored.In order to obtain the thermal parameters of the model,a corresponding parameter identification method was put forward.The basic linear parameters and forced convection parameters were all obtained by measuring and fitting the temperature curves of voice coil at different single tones.A series of experiments were conducted to verify the proposed model and parameter identification method,and the results showed good aggrement between the measured and predicted temperature curves for different input signals.The proposed model was valid and accurate,and may be helpful for the design and application of microspeakers. 展开更多
关键词 Microspeakers heat transfer thermal model mobile phones
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Mobile phones in the orthopedic operating room: Microbial colonization and antimicrobial resistance 被引量:1
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作者 Nada Qaisar Qureshi Syed Hamza Mufarrih +5 位作者 Seema Irfan Rizwan Haroon Rashid Akbar Jaleel Zubairi Anum Sadruddin Israr Ahmed Shahryar Noordin 《World Journal of Orthopedics》 2020年第5期252-264,共13页
BACKGROUND Surgical site infections are a major cause of morbidity and mortality following orthopedic surgery.Recent efforts to identify sources of contamination in the operating rooms have implicated mobile phones.AI... BACKGROUND Surgical site infections are a major cause of morbidity and mortality following orthopedic surgery.Recent efforts to identify sources of contamination in the operating rooms have implicated mobile phones.AIM To investigate microbial colonization on the mobile phones of health care professionals in the orthopedic operating room.METHODS We conducted a cross-sectional study involving culture and sensitivity analysis of swabs taken from the mobile phones of orthopedic and anesthesia attendings,residents,technicians and nurses working in the orthopedic operating rooms over a period of two months.Demographic and cell phone related factors were recorded using a questionnaire and the factors associated with contamination were analyzed.RESULTS Ninety-three of 100 mobile phones were contaminated.Species isolated were Coagulase-negative Staphylococcus(62%),Micrococcus(41%)and Bacillus(26%).The risk of contamination was increased with mobile covers and cracked screens and decreased by cell phone cleaning.CONCLUSION Mobile phones belonging to health care workers are frequently contaminated with pathogenic bacteria with the potential of transferring drug resistance to nosocomial pathogens.Studies investigating the relationship to surgical site infections need to be conducted.The concept of"mobile hygiene"involving the change of mobile covers,replacement of cracked screens or even wiping the phone with an alcohol swab could yield the cost-effective balance that contaminated cell phones deserve until they are established as a direct cause of surgical site infections. 展开更多
关键词 mobile phones CONTAMINATION Surgical site infections Orthopedic surgeries Antimicrobial resistance
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Location Based Services Acceptance and Adoption Evaluation: An Investigation on Mobile Phone Users’ Response to Awareness and Utilization of LBS Technology in Nairobi Kenya 被引量:1
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作者 Charles Busera Wasomi Edward Hunja Waithaka +1 位作者 Moses Karoki Gachari David Ndegwa Kuria 《Journal of Computer and Communications》 2021年第10期60-96,共37页
Location Based Navigation System (LBNS) is a specific Location Based Service (LBS) purely for navigational purpose. These systems resolve position of a user by using GNSS/GPS positioning technologies, to which supplem... Location Based Navigation System (LBNS) is a specific Location Based Service (LBS) purely for navigational purpose. These systems resolve position of a user by using GNSS/GPS positioning technologies, to which supplementary information on goods and services are tagged. The navigation services have become popular and can be installed on mobile phones to provide route information, location of points of interest and user’s current location. LBS has continued to face challenges which include “communication” process towards user reference. Location Based Service System conveys suitable information through a mobile device for effective decision making and reaction within a given time span. This research was geared at understanding the state of LBS technology acceptance and adoption by users in Nairobi Kenya. To do this a quantitative study was carried out through a questionnaire, to investigate mobile phone users’ response on awareness and use of LBS technology. Testing the growth of this technology in this region compared to predictions in previous studies using Technology Acceptance Model (TAM), it is evident that many users may be aware of GPS functionality in mobile phones but are certainly yet to fully embrace the technology as they rarely use it. This points to some underlying challenges towards this technology within this part of the World, thereby recommending for deliberate monitoring and evaluation of LBS technology for sustenance growth based on user satisfaction and acceptance for improved usability. 展开更多
关键词 Location Based Services (LBS) SMARTphone mobile Device mobile phone Location Based Navigation Service (LBNS) Technology Acceptance Model Quantitative Analysis
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Impacts of exposure to 900 MHz mobile phone radiation on liver function in rats 被引量:1
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作者 Hui-rong MA Zhi-hong MA +4 位作者 Gui-ying WANG Cui-miao SONG Xue-lian MA Xiao-hui CAO Guo-hong ZHANG 《中国应用生理学杂志》 CAS CSCD 2015年第6期567-571,共5页
Objective: To study the impacts of exposure to electromagnetic radiation(EMR) on liver function in rats. Methods: Twenty adult male Sprague-Dawley rats were randomly divided into normal group and radiated group. The r... Objective: To study the impacts of exposure to electromagnetic radiation(EMR) on liver function in rats. Methods: Twenty adult male Sprague-Dawley rats were randomly divided into normal group and radiated group. The rats in normal group were not radiated, those in radiated group were exposed to EMR 4 h/d for 18 consecutive days. Rats were sacrificed immediately after the end of the experiment. The serum levels of alanine aminotransferase(ALT) and aspartate aminotransferase(AST), and those of malondialdehyde(MDA) and glutathione(GSH) in liver tissue were evaluated by colorimetric method. The liver histopathological changes were observed by hematoxylin and eosin staining and the protein expression of bax and bcl-2 in liver tissue were detected by immunohistochemical method. Terminal-deoxynucleotidyl transferase mediated nick and labelling(TUNEL) method was used for analysis of apoptosis in liver. Results: Compared with the normal rats, the serum levels of ALT and AST in the radiated group had no obvious changes(P>0.05), while the contents of MDA increased(P<0.01) and those of GSH decreased(P<0.01) in liver tissues. The histopathology examination showed diffuse hepatocyte swelling and vacuolation, small pieces and focal necrosis. The immunohistochemical results displayed that the expression of the bax protein was higher and that of bcl-2 protein was lower in radiated group. The hepatocyte apoptosis rates in radiated group was higher than that in normal group(all P<0.01). Conclusion: The exposure to 900 MHz mobile phone 4 h/d for 18 days could induce the liver histological changes, which may be partly due to the apoptosis and oxidative stress induced in liver tissue by electromagnetic radiation. 展开更多
关键词 SD大鼠 手机辐射 肝功能 BCL-2蛋白 免疫组化方法 MDA含量 电磁辐射 丙氨酸转氨酶
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