On the Capacity Degradation Due to Coexistence of WCDMA and CDMA2000 Systems

In this paper,we investigate the capacity degradation due to the coexistence of WCDMA and CDMA2000 net-works by system-level Monte Carlo simulation.Both systems are simulated according to the deployment of macro cells,andspeech service is considered.The capacity losses under different carrier spacing and different geographical offset are evalu-ated.Simulation results show that considerable capacity loss is seen when WCDMA is the victim system,while the influ-ence of WCDMA to CDMA2000 is slight.Increasing carrier-to-carrier spacing and decreasing geographical offset lead toless capacity loss and co-locating the base stations of both systems is a preferred solution.     

Constructivist treatment of Bell’s inequality violations and the no-hidden-variable theorems

The biphoton experiment demonstrating Bell’s inequality violation is discussed from the standpoint of constructive quantum mechanics. It is shown that the no-go theorems on hidden-variable theories follow from the fact that the problem of applicability of an arbitrary algorithm to an arbitrary number cannot be solved effectively.     

Extension of Delay Tolerant Network’s Routing Protocols for Preventing Excessive Utilization of Resources

The routing algorithms of DTN have the inbuilt storage management scheme such as Hop based TTL (Spray and Wait) or passive cure (Potential-based Entropy Adaptive Routing PEAR). There has been a significant amount of work in the past regarding buffer management policies. In this paper, we have proposed a new message deletion policy for multi-copy routing schemes. In this scheme, message delivery information is communicated to the other nodes in the network for removing useless bundles from the network, which prevents the nodes from the buffer overflow problem and avoid transfer of useless message replicas thus relaxing the resources of the nodes. We evaluate our proposed method by simulating network, on four major DTNs routing algorithms: Epidemic, Spray and Wait, ProPHET and MaxProp. The simulation results clearly show significant improvement in the value of delivery probability and the overhead ratio for an Epidemic, Spray and Wait, and Prophet routing protocols.     

Drone delivery: Factors affecting the public’s attitude and intention to adopt

Drones, or unmanned aerial vehicles (UAVs), show high potential for parcel delivery. Drone delivery may be faster, less expensive, and more eco-friendly than traditional delivery modes such as trucks. Drones are not yet in commercial use, but many companies such as Amazon and Google have done pilot tests, and they will probably become common in the near future. Regardless of what companies decide, however, adoption intention among customers is vague. This study explores the factors affecting attitudes to drone delivery service and intention to adopt among 296 U.S. consumers by online survey. The results demonstrate that the relative advantages of speed and environmental friendliness, along with complexity, performance risk, and privacy risk, affect drone delivery adoption. Personal innovativeness also positively affects adoption intention. Furthermore, the results show that the determinants of drone delivery adoption differ according to the customer’s area of residence.     

In-vehicle augmented reality TSR to improve driving safety and enhance the driver’s experience

In-vehicle contextual augmented reality (AR) has the potential to provide novel visual feedbacks to drivers for an enhanced driving experience. In this paper, we propose a new AR traffic sign recognition system (AR-TSR) to improve driving safety and enhance the driver’s experience based on the Haar cascade and the Bag-of-Visual-Words approach, using spatial information to improve accuracy and an overview of studies related to the driver’s perception and the effectiveness of the AR in improving driving safety. In the first step, the region of interest (ROI) is extracted using a scanning window with a Haar cascade detector and an AdaBoost classifier to reduce the computational region in the hypothesis generation step. Second, we proposed a new computationally efficient method to model global spatial distribution of visual words by taking into consideration the spatial relationships of its visual words. Finally, a multiclass sign classifier takes the positive ROIs and assigns a 3D traffic sign for each one using a linear SVM. Experimental results show that the suggested method could reach comparable performance of the state-of-the-art approaches with less computational complexity and shorter training time, and the AR-TSR more strongly impacts the allocation of visual attention during the decision-making phase.     

Dependence of the efficiency of a CdS/CdTe solar cell on the absorbing layer’s thickness

On the basis of the continuity equation, the spatial distribution of photogenerated excess electrons in the neutral region of the CdTe layer in a CdS/CdTe heterostructure is analyzed taking into account recombination at the rear surface of the layer. It is demonstrated that, owing to diffusion, excess electrons penetrate deep into the CdTe layer at distances far exceeding the effective penetration length for solar radiation. Calculations of the short-circuit current indicate that, for electron lifetimes of 10^?10–10^?9 s, typical of thin-film CdS/CdTe solar cells, recombination losses are insignificant if the CdTe layer’s thickness amounts to 3–4 μm but increase dramatically if the thickness is below 1–1.5 μm. In order to eliminate recombination losses in more efficient solar cells where the electron lifetime is ≥10^?8 s the absorbing CdTe layer needs to be much thicker.     

On the optimal defibrillation waveform--how to reconcile theory and experiment?

Medical intervention by electrical current as applied to humans or animals may have tremendous therapeutic impact if delivered while being carefully controlled. Otherwise, the situation can be harmful in terms of injury or even become lethal. These consequences demand close inspection of all relevant biological and technical factors. Regarding methods to counter fibrillation of the heart substantial progress has been made, but defining a gold standard for the waveshape and energy delivery remains a serious challenge. The anticipated answer is not simply a range somewhere between a maximum and a minimum, but most likely an "intelligently" selected case-specific optimum, delicately positioned between effective and unsafe. Combining insight from theory with pertinent experimental findings may offer a clearer view on an unresolved issue that often points to a cross-road of life and death.     

Implementation of the Broad-band User Access Network and the Study of the Key Algorithm for Improving the Performance of Asymmetrical Networks

Implementation of the Broad-band User Access Network and the Study of the Key Algorithm for Improving the Performance of Asymmetrical Networks     

Comparison of the usability and security of NFC’s different operating modes in mobile devices

This paper highlights the benefits and drawbacks of NFC’s different operating modes with regard to their usability and security. Based on an analysis of both traditional and new communication concepts for mobile NFC devices, their current availability and, specifically, the features to provide security are evaluated. The result of this evaluation is a comparison between the availability, the usability and the security of NFC’s different operating modes.     

On the Use of Radiometric Measurements to Estimate Atmospheric Attenuation at 100 and 300 GHz

At frequencies of between 100 GHz and 30 THz, propagation conditions are severely affected by the influence of the composition and phenomena of the troposphere. This paper focuses on the use of radiometric measurements to estimate attenuation at 100 and 300 GHz, considering non-scattering scenarios, in which the main contributions are given by atmospheric gases and non-rainy clouds. These techniques allow the estimation of the absorption loss through the entire atmosphere, without the need for a signal source situated in a satellite or a high altitude aircraft. On the basis of well-accepted absorption models, the results of calculating gaseous, cloud, and total attenuation using 3-year meteorological data from Madrid, Spain, are detailed, as well as estimates of the expected values of the sky brightness temperature as measured by the radiometer. Finally, based on the results obtained, a discussion on the use of radiometric measurements at both frequencies is presented, in connection with an experimental campaign currently under preparation.     

On the 70th birthday of Vladimir Grigor’evich Mokerov

Chronicle

On the 70th birthday of Vladimir Grigor’evich Mokerov     

On the Form Invariance and Lie Symmetry of Birkhoffian Systems

The conservation laws (of first integrals) of mechanical systems are always of mathematical importance, and they are regarded as a manifestation of some profound physical principle. The modern means of finding conservation laws are mainly Noether symmetry and Lie symmetry. The Noether symmetry is an invariance of Hamiltonian action under the infinitesimal transformations of time and the coordinates. The Lie symmetry is an invariance of the differential equations of motion under the infinites…     

On the 80th birthday of Anatolii Vasil’evich Vashkovskii

Chronicle

On the 80th birthday of Anatolii Vasil’evich Vashkovskii     

On the 70th birthday of Anatolii Serafimovich Il’inskii

Chronicle

On the 70th birthday of Anatolii Serafimovich Il’inskii     

On the 80th birthday of Anri Amvros’evich Rukhadze

Chronicle

On the 80th birthday of Anri Amvros’evich Rukhadze     

A Distributed Intranet/Web Solution to Integrated Management of Access Networks

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A Recognition Method of Basketball’s Shooting Trajectory Based On Transfer Learning

Mobile Networks and Applications - Due to the low recognition accuracy and slow convergence speed of the traditional basketball shooting trajectory recognition methods, this paper proposes a...