Wireless node localization is one of the key technologies for wireless sensor networks. Outdoor localization can use GPS, AGPS (Assisted Global Positioning System) [6], but in buildings like supermarkets and undergrou...Wireless node localization is one of the key technologies for wireless sensor networks. Outdoor localization can use GPS, AGPS (Assisted Global Positioning System) [6], but in buildings like supermarkets and underground parking, the accuracy of GPS and even AGPS will be greatly reduced. Since Indoor localization requests higher accuracy, using GPS or AGPS for indoor localization is not feasible in the current view. RSSI-based trilateral localization algorithm, due to its low cost, no additional hardware support, and easy-understanding, it becomes the mainstream localization algorithm in wireless sensor networks. With the development of wireless sensor networks and smart devices, the number of WIFI access point in these buildings is increasing, as long as a mobile smart device can detect three or three more known WIFI hotspots’ positions, it would be relatively easy to realize self-localization (Usually WIFI access points locations are fixed). The key problem is that the RSSI value is relatively vulnerable to the influence of the physical environment, causing large calculation error in RSSI-based localization algorithm. The paper proposes an improved RSSI-based algorithm, the experimental results show that compared with original RSSI-based localization algorithms the algorithm improves the localization accuracy and reduces the deviation.展开更多
Sentiment classification is an automatic opinion classification method to classify the product reviews on web into positive or negative opinions to help consumers or sellers to understand the opinions and evaluations ...Sentiment classification is an automatic opinion classification method to classify the product reviews on web into positive or negative opinions to help consumers or sellers to understand the opinions and evaluations from existing customers. Semantic-oriented approach is one of the recent developments in sentiment classification. Up to now, most research of sentiment classification is on English reviews,and little work has been done on Chinese reviews using sentiment classification. The detailed techniques used in English review cannot be applied directly to Chinese reviews due to the different characteristics between these two languages. This study modified and improved the semantic-oriented approach to a 6-step process for Chinese review, focusing on the modification and improvement on the text segmentation and reference words pairs (RWPs) identification. Two experiments were conducted on book reviews and cell phone reviews. The results show that the performances of the proposed approach are comparable to those of the existing English reviews classification studies.展开更多
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
Topological valley photonics has recently gained widespread interest owing to its robustness and backscattering immunity against disorders.Previous topological valley transport based on kink states required an interfa...Topological valley photonics has recently gained widespread interest owing to its robustness and backscattering immunity against disorders.Previous topological valley transport based on kink states required an interface between two topologically distinct domains,while recent studies have reported that chiral edge states(CESs)can be realized at the external boundary of topological insulators by changing the on-site edge potentials.However,current research on CESs is predominantly focused on the microwave frequency range,leaving challenges for emerging terahertz communications.Here,cladding-free CESs are demonstrated at the external boundary of terahertz all-silicon topological valley photonic crystals with gapless,single-mode,and linear dispersion.We show that CESs are immune to backscattering against sharp corners and support unidirectional propagation of chiral excitations.We also achieved smooth transition between kink states and CESs supported by an all-silicon platform,which could be used as the terahertz inner-chip connection.Finally,a terahertz wireless link between two disconnected CESs is verified for the near-field information interconnection between distinct mobile phones.Our work indicates CESs can improve the compactness of terahertz circuits and inspire advanced terahertz interchip communications.展开更多
Kansei engineering, also known as k, unsei ergonomics or emotional engineering, aims at analysing and incorporating customer＇s feeling and demands into product function and product design. Founded in the late 1970＇s...Kansei engineering, also known as k, unsei ergonomics or emotional engineering, aims at analysing and incorporating customer＇s feeling and demands into product function and product design. Founded in the late 1970＇s, kansei is now considered as a key consumer-oriented technology for new product development. This paper described a system called FuzEmotion for the purpose of assessing the kansei aspects of a product by considering design attributes of a product. Fuzzy logic is used to represent kansei words and process fuzzy input. The system has been successfully implemented to ascertain gender inclination of a mobile phone. Principal parameters of a mobile phone are considered, i.e., length, width, thickness, and mass. The system can inform gender inclination of a mobile phone with accuracy up to 76 %. This is based on a set of 92 mobile phone samples from the five major mobile phone manufacturers.展开更多
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
One common scenario during disasters such as earthquakes is that the activity of damage field reconnaissance on site is not well-coordinated. For example in Italy the damage assessment of structures after an earthquak...One common scenario during disasters such as earthquakes is that the activity of damage field reconnaissance on site is not well-coordinated. For example in Italy the damage assessment of structures after an earthquake is managed from the Italian Emergency Authority, using printed forms （AeDES） which are filled by experts on site generating a lot of confusion in filling and transferring the forms to the Disaster Management Operative Center. Because of this, the paper explores the viability of using mobile communication technologies （smart phones） and the Web to develop response systems that would aid communities after a major disaster, providing channels for allowing residents and responders ofuploading and distributing information, related to structural damages coordinating the damage field reconnaissance. A mobile application that can be run by residents on smart phones has been developed, to give an initial damage evaluation of the area, which is going to be very useful when resources （e.g. the number of experts is limited）. The mobile application has been tested for the first time during 2012 Emilia earthquake to enhance the emergency response, showing the efficiency of the proposed method in statistical terms comparing the proposed procedure with the standard procedure.展开更多
The popularization of smartphones and the acceleration of their replacement lead to a surge in mobile phone disposal.How to recycle waste mobile phones efficiently becomes a major problem in today’s society.The“Inte...The popularization of smartphones and the acceleration of their replacement lead to a surge in mobile phone disposal.How to recycle waste mobile phones efficiently becomes a major problem in today’s society.The“Internet+”recycling mode is an effective way to solve this problem.The recycling process of waste mobile phones involves retailers,manufacturers,third parties and other recycling parts.Retailers have natural advantages compared with other parts because of their perfect sales network and logistics system.The system dynamics model for“Internet+”recycling of waste mobile phones dominated by retailers is constructed,and the Vensim software is used to simulate the influence of changes in two key factors in“Internet+”recycling environment:Annual operating cost of online platform and offline unit logistics cost on retailers’recycling volume and recycling profit.The results show that the investment of online platform operation cost is conducive to the increase of retailers’online waste mobile phone recycling volume and recycling profit,while the investment of offline logistics cost increases retailers’online waste mobile phone recycling volume,but reduces the recycling profit.展开更多
In this paper, we present one method to attack on the GMR-2 algorithm used in satellite phone under the chosen-plaintexts. First using the relationship of the rows of the two s-boxes and outputs of the F coordinate, w...In this paper, we present one method to attack on the GMR-2 algorithm used in satellite phone under the chosen-plaintexts. First using the relationship of the rows of the two s-boxes and outputs of the F coordinate, we attack on the GMR-2 algorithm. Then we deduce the happening probability of read-collision, and analyze its mathematical expectation. Finally, combining with the read-collision, we present an improved method to attack on the GMR-2 algorithm. The research results show that the complexity of the improved algorithm is about 220, and the session key Kc can be recovered in about 0.3 seconds. Compared with the available method, our method takes less time than the guess-and-decide attack method which is 700 s.展开更多
Background: Many studies revealed that devices like stethoscope, mobile phones can act as an important source of microbes capable of causing nosocomial infections. Hence there is need of defining their role in spreadi...Background: Many studies revealed that devices like stethoscope, mobile phones can act as an important source of microbes capable of causing nosocomial infections. Hence there is need of defining their role in spreading infection, so that we can take some preventive measures against it. Aims: To screen the mobile phones of resident doctors and perform microbeological study of the organisms isolated. Setting: Resident doctors working at Tertiary Care Hospital. Methods: Swabs of 50 mobile phones of resident doctors were taken by sterile cotton swab and inoculated on Blood agar, MacConkey agar, Sabaraud’s dextrose agar. Isolated organisms were processed according to standard protocol. Results: Swabs of mobile phones of 50 resident doctors were analyzed for presence of micro-organisms. Out of the 50 samples, 30 (60%) were contaminated with micro-organisms. 32 micro-organisms were isolated from 50 mobile phones as shown in table 3. Among 32 isolates, Coagulase negative Staphylococci 23 (71.87%) was the dominant organism followed by Diphtheroids 7 (21.87%), Aspergillus niger 2 (6.25%). Also proportion of contamination of mobile phones of male resident doctors was more than female resident doctors. Conclusion: Mobile phones may act as a potential source of micro-organisms and spread nosocomial infections. Hence proper infection control practices like proper hand washing, decontamination of mobiles should be routinely practiced.展开更多
Smart phones with unlimited applications are considered essential for modern day lifestyle, hence the number of cell phone users has sky rocketed in this decade. The high percentage of children and teenagers carrying ...Smart phones with unlimited applications are considered essential for modern day lifestyle, hence the number of cell phone users has sky rocketed in this decade. The high percentage of children and teenagers carrying cell phones has caused controversy on how justified having a minor carrying a communication device is. There is no doubt about the fact that parents have to be able to contact their children, however, a child with a phone and poor judgment will most probably be vulnerable to the outer world with all its’ threats and abuses. Furthermore, we have the serious health issues related to wireless devices effects on people, under those circumstances multiple solutions have been presented for a safe secure method for parents to track their children without the need of cell phones. The proposed alternatives included phones with limited privileges for children;these phones are restricted to the ability of calling specific people only and have already installed applications for tracking location. Our proposed system “kids’ tracker” includes a wearable device for the child and an Android application on the parents’ smart phone. Kids’ tracker has shown a very decent performance with many unique features compared to other existing solutions.展开更多
In recent years, widespread use of mobile phones has led to a public debate about possible harmful effects on human health. A lot of researchers studied the possible effect of radiofrequency energy (RFE) emitted from ...In recent years, widespread use of mobile phones has led to a public debate about possible harmful effects on human health. A lot of researchers studied the possible effect of radiofrequency energy (RFE) emitted from cell phones on the human body. Up to our knowledge no one studied the effect of these waves on the thyroid gland by Ultrasonography (US). Our aim was to investigate the possible effects of EMR arising from cell phones on the thyroid gland using US. A prospective study was done on 180 participants, 110 females and 70 males, ranging in age from 15 to 65. A constructed questionnaire was distributed among them before performing US of the neck. Demographic data along with US findings were collected and statistically analyzed. A total of 46.7% of our participants had abnormal findings of the thyroid gland more in non smart phone users and more in females. The commonest abnormality was multinodular goiter (54%). Expanded researches are still needed to answer the question about the hazards of RFE on human health. All efforts should be made to encourage users of cellular phone to follow mobile device recommendations of manufacturers and avoid its possible hazards as possible.展开更多
With the purpose of reducing the influence of background noise on the call quality of mobile phones, background noise suppression circuit is designed based on the principle of self-adaptive noise cancellation. Because...With the purpose of reducing the influence of background noise on the call quality of mobile phones, background noise suppression circuit is designed based on the principle of self-adaptive noise cancellation. Because this method is not involved in the nature of the noise itself, it can be used both for stationary noise cancellation and quasi-stationary noise cancellation. The working principle and circuit design of the system are introduced in detail. Simulated experiment was conducted in the lab, and its experimental results were analyzed. The experimental results show that the circuit works well with low cost, and has a broad prospect of application and popularization.展开更多
With the increasing use of electronic gadgets, the effects of electromagnetic waves on sperm quality have been reported. This study evaluated the capacity of seminal antioxidants to protect spermatozoa from the effect...With the increasing use of electronic gadgets, the effects of electromagnetic waves on sperm quality have been reported. This study evaluated the capacity of seminal antioxidants to protect spermatozoa from the effects of exposure to non-ionizing cellular phone radiation on markers of semen quality and DNA integrity in an in-vitro model. A total of seventy-three (73) patients attending a fertility centre in Sakumono, Tema metropolis were recruited for this study. About 2 - 3 mls of freshly ejaculated semen was neatly collected by masturbation with consent and analysed according to the 2010 WHO standard semen analysis. A portion of Semen was exposed to non-ionizing cellular phone radiation for three (3) hours. Superoxide dismutase (SOD) activity levels and DNA fragmentation index (DFI) were determined before and after exposure. Data was entered and analysed using SPSS version 20.00 and Graph pad prism. DFI was positively associated with immobility (r = 0.233;p = 0.05) and negatively associated with percentage progressive motility (r = -0.258;p = 0.028), percentage total motility (r = -0.233;p = 0.05) and SOD levels (r = -0.270;p = 0.028). There was a significant positive linear relationship between SOD and progressive motility (r = 0.451;p < 0.0001), vitality (r = 0.725;p < 0.0001) and total motility (r = 0.705, p = 0.05). Higher seminal SOD level is protective against the damaging effects of electromagnetic waves on sperm quality.展开更多
Brain tissue plays a significant role in both cognitive and psychomotor behavior of humans. However, their interaction with radiation emanating from hand held mobile devices is still not fully understood. This researc...Brain tissue plays a significant role in both cognitive and psychomotor behavior of humans. However, their interaction with radiation emanating from hand held mobile devices is still not fully understood. This research was aimed at investigating radiation absorption in brain tissue. Bovine brain tissues ranging from lesser than 1 year to greater than 10 years of age were bought from a specialty store (Sigma-Aldrich). The tissues were used within 72 h of extraction for ex vivo brain experiments. The brain tissue was stored at 6°C and then 16°C for 24 h in the MRI room to reach thermal equilibrium before any experiments were undertaken. The averages for the dielectric constant were measured from 1 - 4 GHz using open ended coaxial probe (OECP) (85,070E;Agilent Technologies). The results obtained for the dielectric properties were then used as raw data in the numerical computation and simulation of the radiation absorption by the brain tissues for both adolescent and adults bovine brain tissue using finite element method (FEM). The measured dielectric constants varied for the different brain tissue from 54.39 to 39.29. Analysis showed that adolescents tissue absorbed more radiation than adults from mobile phoneradiation which is due to the higher dielectric property of adolescent brain tissue. The results obtained can be applied to human brain tissue since bovine shares the same compositional properties with humans.展开更多
<strong>Background: </strong>The use of mobile phones continues to rise rapidly in the provision of health related services. Many countries have adopted the use of mobiles to provide sexual and reproductiv...<strong>Background: </strong>The use of mobile phones continues to rise rapidly in the provision of health related services. Many countries have adopted the use of mobiles to provide sexual and reproductive health and rights and especially among the adolescents where specific messages are tailored for various audiences with specific messages. The purpose of this paper is to present the results of a research priority setting exercise on mHealth and innovative strategies. <strong>Methods:</strong> We adapted Child Health and Nutrition Research Initiative methodology to identify and set research priorities on mHealth and innovative strategies that respond to sexual and reproductive health and rights services. General potential research questions were gathered online from multiple stakeholders in the region and sent for consolidation consolidated to technical experts in World Health Organization headquarters. The second phase involved a meeting with experts to review and thematically analyze the questions list of 33 questions producing a list of 22 research questions. The questions were scored against a six point criteria and ranked accordingly. Ten top priority research questions were identified. <strong>Results: </strong>Lists of 33 priority research questions for mHealth and innovative strategies were proposed for discussions by 67 stakeholders. The questions were reviewed, scored and ranked in a technical meeting by experts. The highest ranking questions at 87% include evaluation of mHealth for data management and sexual and reproductive health and rights decision making, assessment of innovative local financing techniques to support community based sexual reproductive health and rights and evaluation of the role of mobile technologies in referral and counter referral. <strong>Conclusions</strong>: Information and communication technology is developing drastically and has a great potential in improving health especially in sexual and reproductive health and rights service delivery. This potential must be demonstr展开更多
Use of Electronic gadgets such as mobile phones, computers/laptops constitutes an integral part of human day-to-day activity in offices and businesses. Therefore, their use cannot be stopped. These electronic gadgets ...Use of Electronic gadgets such as mobile phones, computers/laptops constitutes an integral part of human day-to-day activity in offices and businesses. Therefore, their use cannot be stopped. These electronic gadgets emit electromagnetic radiations, which are believed to be hazardous to human health. World Health Organization/International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group B). The Enviro Chip developed by Synergy Environics, India, is a radiation harmonizing chip which when fixed on electronic gadgets at specific locations claims to reduce stress level by reducing the pulse rate of users which may also result in improvement of other health parameters. In this study, we have tested the ability of the Enviro Chip to reduce pulse rate of people who may have developed high pulse rate due to prolonged use of electronic gadgets. This was the double blind crossover study conducted in 205 healthy volunteers having an average pulse rate of above 82 per Minute at Max Healthcare India. The primary objective of the study was to evaluate and compare the change in pulse rate over 14 measurements with the use of both the Enviro Chip and a Dummy chip from average pulse rate at baseline without the Placebo effect. The secondary objective was to evaluate the change in pulse rate gender-wise. Data analysis was done using Wilcoxon Sign Rank test. The study demonstrated statistical significant reduction in pulse rate over 14 measurements with the use of Enviro Chip in both male and female healthy volunteers展开更多
Background: The association between cellular phones and brain tumors is a question that is frequently asked of the medical and scientific community. The prevalence of cell phone use and the significant morbidity and m...Background: The association between cellular phones and brain tumors is a question that is frequently asked of the medical and scientific community. The prevalence of cell phone use and the significant morbidity and mortality of brain tumors contribute to this pairing. Cell phones are known to emit radio frequency energy in the form of both ionizing and non-ionizing radiation. Ionizing radiation is known to be within X-rays, which do have an association with cancer. Objective: To assess if the use of the cell phone has an association with brain tumors. Methods: The searches performed through PubMed were conducted to find studies that sought to provide evidence as to whether or not increased cell phone exposure contributed to the development of brain tumors. Also searched for was increased regional metabolism of the brain with the use of the cell phone switched in the on position. Studies were restricted to being published during or after the year 2000 and presented in the English language. Results: The studies largely support the conclusion that cell phone usage does not lead to the development of brain cancer. Studies employed different strategies, such as the prospective cohort and case-control studies to reach this conclusion. Both studies failed to show statistically significant evidence that cell phones were associated with brain tumors of the central nervous system. Conclusions: Questions raised by crossover studies demonstrating increased regional brain glucose metabolism continue to remain largely unanswered by current research and remain a starting point for future research. The prevalence of the issue strengthens its position among others as a matter that the medical community must continue to address to meet the needs of an increasingly exposed patient population. The overall hypothesis that cell phone usage does not lead to the development of brain tumors was supported.展开更多
文摘Wireless node localization is one of the key technologies for wireless sensor networks. Outdoor localization can use GPS, AGPS (Assisted Global Positioning System) [6], but in buildings like supermarkets and underground parking, the accuracy of GPS and even AGPS will be greatly reduced. Since Indoor localization requests higher accuracy, using GPS or AGPS for indoor localization is not feasible in the current view. RSSI-based trilateral localization algorithm, due to its low cost, no additional hardware support, and easy-understanding, it becomes the mainstream localization algorithm in wireless sensor networks. With the development of wireless sensor networks and smart devices, the number of WIFI access point in these buildings is increasing, as long as a mobile smart device can detect three or three more known WIFI hotspots’ positions, it would be relatively easy to realize self-localization (Usually WIFI access points locations are fixed). The key problem is that the RSSI value is relatively vulnerable to the influence of the physical environment, causing large calculation error in RSSI-based localization algorithm. The paper proposes an improved RSSI-based algorithm, the experimental results show that compared with original RSSI-based localization algorithms the algorithm improves the localization accuracy and reduces the deviation.
基金Supported by the National Natural Science Foundation of China (No. 70501009), the Social Science Foundation of Harbin Institute of Technology ( No. 050417) , and Natural Science Foundation of Heilongjiang Province of China ( No.G0304)
文摘Sentiment classification is an automatic opinion classification method to classify the product reviews on web into positive or negative opinions to help consumers or sellers to understand the opinions and evaluations from existing customers. Semantic-oriented approach is one of the recent developments in sentiment classification. Up to now, most research of sentiment classification is on English reviews,and little work has been done on Chinese reviews using sentiment classification. The detailed techniques used in English review cannot be applied directly to Chinese reviews due to the different characteristics between these two languages. This study modified and improved the semantic-oriented approach to a 6-step process for Chinese review, focusing on the modification and improvement on the text segmentation and reference words pairs (RWPs) identification. Two experiments were conducted on book reviews and cell phone reviews. The results show that the performances of the proposed approach are comparable to those of the existing English reviews classification studies.
文摘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...
基金supported by the National Natural Science Foundation of China(NSFC)(Nos.62175083 and 61935015)the Natural Science Foundation of Jilin Province(No.20230101359JC)the Fundamental Research Funds for the Central Universities。
文摘Topological valley photonics has recently gained widespread interest owing to its robustness and backscattering immunity against disorders.Previous topological valley transport based on kink states required an interface between two topologically distinct domains,while recent studies have reported that chiral edge states(CESs)can be realized at the external boundary of topological insulators by changing the on-site edge potentials.However,current research on CESs is predominantly focused on the microwave frequency range,leaving challenges for emerging terahertz communications.Here,cladding-free CESs are demonstrated at the external boundary of terahertz all-silicon topological valley photonic crystals with gapless,single-mode,and linear dispersion.We show that CESs are immune to backscattering against sharp corners and support unidirectional propagation of chiral excitations.We also achieved smooth transition between kink states and CESs supported by an all-silicon platform,which could be used as the terahertz inner-chip connection.Finally,a terahertz wireless link between two disconnected CESs is verified for the near-field information interconnection between distinct mobile phones.Our work indicates CESs can improve the compactness of terahertz circuits and inspire advanced terahertz interchip communications.
文摘Kansei engineering, also known as k, unsei ergonomics or emotional engineering, aims at analysing and incorporating customer＇s feeling and demands into product function and product design. Founded in the late 1970＇s, kansei is now considered as a key consumer-oriented technology for new product development. This paper described a system called FuzEmotion for the purpose of assessing the kansei aspects of a product by considering design attributes of a product. Fuzzy logic is used to represent kansei words and process fuzzy input. The system has been successfully implemented to ascertain gender inclination of a mobile phone. Principal parameters of a mobile phone are considered, i.e., length, width, thickness, and mass. The system can inform gender inclination of a mobile phone with accuracy up to 76 %. This is based on a set of 92 mobile phone samples from the five major mobile phone manufacturers.
文摘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.
基金funding from the European Community's Seventh Framework Programme-Marie Curie International Reintegration Actions-FP7/2007-2013 under the Grant Agreement No. PIRG06-GA-2009-256316 of the project ICRED-Integrated European Disaster Community Resiliencesponsored by the Israel-Italy Joint Innovation Program for Industrial, Scientific and Technological Cooperation in R&D, EUREKA Label under the Grant agreement No. 3435777CDC of the project ECRIS-European Communities resilient integrated through Smart Phones
文摘One common scenario during disasters such as earthquakes is that the activity of damage field reconnaissance on site is not well-coordinated. For example in Italy the damage assessment of structures after an earthquake is managed from the Italian Emergency Authority, using printed forms （AeDES） which are filled by experts on site generating a lot of confusion in filling and transferring the forms to the Disaster Management Operative Center. Because of this, the paper explores the viability of using mobile communication technologies （smart phones） and the Web to develop response systems that would aid communities after a major disaster, providing channels for allowing residents and responders ofuploading and distributing information, related to structural damages coordinating the damage field reconnaissance. A mobile application that can be run by residents on smart phones has been developed, to give an initial damage evaluation of the area, which is going to be very useful when resources （e.g. the number of experts is limited）. The mobile application has been tested for the first time during 2012 Emilia earthquake to enhance the emergency response, showing the efficiency of the proposed method in statistical terms comparing the proposed procedure with the standard procedure.
基金Supported by National Social Science Foundation“Research on the Innovation and Promotion Strategy of China’s E-waste Recycling Model under the‘Internet+’Strategy”(18BGL182)。
文摘The popularization of smartphones and the acceleration of their replacement lead to a surge in mobile phone disposal.How to recycle waste mobile phones efficiently becomes a major problem in today’s society.The“Internet+”recycling mode is an effective way to solve this problem.The recycling process of waste mobile phones involves retailers,manufacturers,third parties and other recycling parts.Retailers have natural advantages compared with other parts because of their perfect sales network and logistics system.The system dynamics model for“Internet+”recycling of waste mobile phones dominated by retailers is constructed,and the Vensim software is used to simulate the influence of changes in two key factors in“Internet+”recycling environment:Annual operating cost of online platform and offline unit logistics cost on retailers’recycling volume and recycling profit.The results show that the investment of online platform operation cost is conducive to the increase of retailers’online waste mobile phone recycling volume and recycling profit,while the investment of offline logistics cost increases retailers’online waste mobile phone recycling volume,but reduces the recycling profit.
基金supported by China Scholarship Council under Grant No.201506965088
文摘In this paper, we present one method to attack on the GMR-2 algorithm used in satellite phone under the chosen-plaintexts. First using the relationship of the rows of the two s-boxes and outputs of the F coordinate, we attack on the GMR-2 algorithm. Then we deduce the happening probability of read-collision, and analyze its mathematical expectation. Finally, combining with the read-collision, we present an improved method to attack on the GMR-2 algorithm. The research results show that the complexity of the improved algorithm is about 220, and the session key Kc can be recovered in about 0.3 seconds. Compared with the available method, our method takes less time than the guess-and-decide attack method which is 700 s.
文摘Background: Many studies revealed that devices like stethoscope, mobile phones can act as an important source of microbes capable of causing nosocomial infections. Hence there is need of defining their role in spreading infection, so that we can take some preventive measures against it. Aims: To screen the mobile phones of resident doctors and perform microbeological study of the organisms isolated. Setting: Resident doctors working at Tertiary Care Hospital. Methods: Swabs of 50 mobile phones of resident doctors were taken by sterile cotton swab and inoculated on Blood agar, MacConkey agar, Sabaraud’s dextrose agar. Isolated organisms were processed according to standard protocol. Results: Swabs of mobile phones of 50 resident doctors were analyzed for presence of micro-organisms. Out of the 50 samples, 30 (60%) were contaminated with micro-organisms. 32 micro-organisms were isolated from 50 mobile phones as shown in table 3. Among 32 isolates, Coagulase negative Staphylococci 23 (71.87%) was the dominant organism followed by Diphtheroids 7 (21.87%), Aspergillus niger 2 (6.25%). Also proportion of contamination of mobile phones of male resident doctors was more than female resident doctors. Conclusion: Mobile phones may act as a potential source of micro-organisms and spread nosocomial infections. Hence proper infection control practices like proper hand washing, decontamination of mobiles should be routinely practiced.
文摘Smart phones with unlimited applications are considered essential for modern day lifestyle, hence the number of cell phone users has sky rocketed in this decade. The high percentage of children and teenagers carrying cell phones has caused controversy on how justified having a minor carrying a communication device is. There is no doubt about the fact that parents have to be able to contact their children, however, a child with a phone and poor judgment will most probably be vulnerable to the outer world with all its’ threats and abuses. Furthermore, we have the serious health issues related to wireless devices effects on people, under those circumstances multiple solutions have been presented for a safe secure method for parents to track their children without the need of cell phones. The proposed alternatives included phones with limited privileges for children;these phones are restricted to the ability of calling specific people only and have already installed applications for tracking location. Our proposed system “kids’ tracker” includes a wearable device for the child and an Android application on the parents’ smart phone. Kids’ tracker has shown a very decent performance with many unique features compared to other existing solutions.
文摘In recent years, widespread use of mobile phones has led to a public debate about possible harmful effects on human health. A lot of researchers studied the possible effect of radiofrequency energy (RFE) emitted from cell phones on the human body. Up to our knowledge no one studied the effect of these waves on the thyroid gland by Ultrasonography (US). Our aim was to investigate the possible effects of EMR arising from cell phones on the thyroid gland using US. A prospective study was done on 180 participants, 110 females and 70 males, ranging in age from 15 to 65. A constructed questionnaire was distributed among them before performing US of the neck. Demographic data along with US findings were collected and statistically analyzed. A total of 46.7% of our participants had abnormal findings of the thyroid gland more in non smart phone users and more in females. The commonest abnormality was multinodular goiter (54%). Expanded researches are still needed to answer the question about the hazards of RFE on human health. All efforts should be made to encourage users of cellular phone to follow mobile device recommendations of manufacturers and avoid its possible hazards as possible.
文摘With the purpose of reducing the influence of background noise on the call quality of mobile phones, background noise suppression circuit is designed based on the principle of self-adaptive noise cancellation. Because this method is not involved in the nature of the noise itself, it can be used both for stationary noise cancellation and quasi-stationary noise cancellation. The working principle and circuit design of the system are introduced in detail. Simulated experiment was conducted in the lab, and its experimental results were analyzed. The experimental results show that the circuit works well with low cost, and has a broad prospect of application and popularization.
文摘With the increasing use of electronic gadgets, the effects of electromagnetic waves on sperm quality have been reported. This study evaluated the capacity of seminal antioxidants to protect spermatozoa from the effects of exposure to non-ionizing cellular phone radiation on markers of semen quality and DNA integrity in an in-vitro model. A total of seventy-three (73) patients attending a fertility centre in Sakumono, Tema metropolis were recruited for this study. About 2 - 3 mls of freshly ejaculated semen was neatly collected by masturbation with consent and analysed according to the 2010 WHO standard semen analysis. A portion of Semen was exposed to non-ionizing cellular phone radiation for three (3) hours. Superoxide dismutase (SOD) activity levels and DNA fragmentation index (DFI) were determined before and after exposure. Data was entered and analysed using SPSS version 20.00 and Graph pad prism. DFI was positively associated with immobility (r = 0.233;p = 0.05) and negatively associated with percentage progressive motility (r = -0.258;p = 0.028), percentage total motility (r = -0.233;p = 0.05) and SOD levels (r = -0.270;p = 0.028). There was a significant positive linear relationship between SOD and progressive motility (r = 0.451;p < 0.0001), vitality (r = 0.725;p < 0.0001) and total motility (r = 0.705, p = 0.05). Higher seminal SOD level is protective against the damaging effects of electromagnetic waves on sperm quality.
文摘Brain tissue plays a significant role in both cognitive and psychomotor behavior of humans. However, their interaction with radiation emanating from hand held mobile devices is still not fully understood. This research was aimed at investigating radiation absorption in brain tissue. Bovine brain tissues ranging from lesser than 1 year to greater than 10 years of age were bought from a specialty store (Sigma-Aldrich). The tissues were used within 72 h of extraction for ex vivo brain experiments. The brain tissue was stored at 6°C and then 16°C for 24 h in the MRI room to reach thermal equilibrium before any experiments were undertaken. The averages for the dielectric constant were measured from 1 - 4 GHz using open ended coaxial probe (OECP) (85,070E;Agilent Technologies). The results obtained for the dielectric properties were then used as raw data in the numerical computation and simulation of the radiation absorption by the brain tissues for both adolescent and adults bovine brain tissue using finite element method (FEM). The measured dielectric constants varied for the different brain tissue from 54.39 to 39.29. Analysis showed that adolescents tissue absorbed more radiation than adults from mobile phoneradiation which is due to the higher dielectric property of adolescent brain tissue. The results obtained can be applied to human brain tissue since bovine shares the same compositional properties with humans.
文摘<strong>Background: </strong>The use of mobile phones continues to rise rapidly in the provision of health related services. Many countries have adopted the use of mobiles to provide sexual and reproductive health and rights and especially among the adolescents where specific messages are tailored for various audiences with specific messages. The purpose of this paper is to present the results of a research priority setting exercise on mHealth and innovative strategies. <strong>Methods:</strong> We adapted Child Health and Nutrition Research Initiative methodology to identify and set research priorities on mHealth and innovative strategies that respond to sexual and reproductive health and rights services. General potential research questions were gathered online from multiple stakeholders in the region and sent for consolidation consolidated to technical experts in World Health Organization headquarters. The second phase involved a meeting with experts to review and thematically analyze the questions list of 33 questions producing a list of 22 research questions. The questions were scored against a six point criteria and ranked accordingly. Ten top priority research questions were identified. <strong>Results: </strong>Lists of 33 priority research questions for mHealth and innovative strategies were proposed for discussions by 67 stakeholders. The questions were reviewed, scored and ranked in a technical meeting by experts. The highest ranking questions at 87% include evaluation of mHealth for data management and sexual and reproductive health and rights decision making, assessment of innovative local financing techniques to support community based sexual reproductive health and rights and evaluation of the role of mobile technologies in referral and counter referral. <strong>Conclusions</strong>: Information and communication technology is developing drastically and has a great potential in improving health especially in sexual and reproductive health and rights service delivery. This potential must be demonstr
文摘Use of Electronic gadgets such as mobile phones, computers/laptops constitutes an integral part of human day-to-day activity in offices and businesses. Therefore, their use cannot be stopped. These electronic gadgets emit electromagnetic radiations, which are believed to be hazardous to human health. World Health Organization/International Agency for Research on Cancer has classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group B). The Enviro Chip developed by Synergy Environics, India, is a radiation harmonizing chip which when fixed on electronic gadgets at specific locations claims to reduce stress level by reducing the pulse rate of users which may also result in improvement of other health parameters. In this study, we have tested the ability of the Enviro Chip to reduce pulse rate of people who may have developed high pulse rate due to prolonged use of electronic gadgets. This was the double blind crossover study conducted in 205 healthy volunteers having an average pulse rate of above 82 per Minute at Max Healthcare India. The primary objective of the study was to evaluate and compare the change in pulse rate over 14 measurements with the use of both the Enviro Chip and a Dummy chip from average pulse rate at baseline without the Placebo effect. The secondary objective was to evaluate the change in pulse rate gender-wise. Data analysis was done using Wilcoxon Sign Rank test. The study demonstrated statistical significant reduction in pulse rate over 14 measurements with the use of Enviro Chip in both male and female healthy volunteers
文摘Background: The association between cellular phones and brain tumors is a question that is frequently asked of the medical and scientific community. The prevalence of cell phone use and the significant morbidity and mortality of brain tumors contribute to this pairing. Cell phones are known to emit radio frequency energy in the form of both ionizing and non-ionizing radiation. Ionizing radiation is known to be within X-rays, which do have an association with cancer. Objective: To assess if the use of the cell phone has an association with brain tumors. Methods: The searches performed through PubMed were conducted to find studies that sought to provide evidence as to whether or not increased cell phone exposure contributed to the development of brain tumors. Also searched for was increased regional metabolism of the brain with the use of the cell phone switched in the on position. Studies were restricted to being published during or after the year 2000 and presented in the English language. Results: The studies largely support the conclusion that cell phone usage does not lead to the development of brain cancer. Studies employed different strategies, such as the prospective cohort and case-control studies to reach this conclusion. Both studies failed to show statistically significant evidence that cell phones were associated with brain tumors of the central nervous system. Conclusions: Questions raised by crossover studies demonstrating increased regional brain glucose metabolism continue to remain largely unanswered by current research and remain a starting point for future research. The prevalence of the issue strengthens its position among others as a matter that the medical community must continue to address to meet the needs of an increasingly exposed patient population. The overall hypothesis that cell phone usage does not lead to the development of brain tumors was supported.
