Narrow Results

The Sznajd model for the spread of opinions gives a good explanation of the influence among the neighbors, that is the external factor. In this paper, we add an internal factor to Sznajd model, which determines the probability of one's acceptance of other's opinion. We define this factor as social temperature, and we study the relationship between this temperature and time. We also consider the people who do not change their opinions as defenders and analyze their efforts.

The BL Lac object 3C 66A was the target of an intensive multiwavelength monitoring campaign organized in 2003–2004. During the campaign, its spectral energy distribution (SED) was measured and flux measurements from radio to X-ray frequencies as well as upper limits in the very high energy (VHE) γ-ray regime were obtained. Here, we reproduce the SED and optical spectral variability pattern observed during our multiwavelength campaign using a time-dependent leptonic jet model. Our model could successfully simulate the observed SED and optical light curves and predict an intrinsic cutoff value for the VHE γ-ray emission at ~4 GeV implying the effect of the optical depth due to the intergalactic infrared background radiation (IIBR) to be negligible. Also, the contribution of external Comptonization (EIC), due to the presence of a broad-line region (BLR), in the emission of γ-ray photons could be significant early-on when the emission region is very close to the central engine but as it travels farther out, the production mechanism of hard X-ray and γ-ray photons becomes dominated by synchrotron self-Compton mechanism (SSC).

As a special type of location-based service (LBS), crowdsensing becomes more prosperous in people’s daily life. However, during the process of task distribution, the publisher’s and workers’ locations will be revealed to each other, and then their personal privacy is violated. So in this paper, in order to cope with the violation of location privacy in crowdsensing and provide privacy preservation service for both entities, an active oblivious transfer-based location privacy preservation crowdsensing scheme (short for AOTC) has been proposed. In this scheme, the oblivious transfer is used to encrypt the range of sensing grid of workers, and then matching sensing grids with the sensing region of the publisher without decryption. During the whole process, the process of location matching and results sending is disposed of by the entity of workers actively, so does not establish any data aggregation that can be used as the point of attack. As a result, the AOTC can guarantee the personal privacy of both entities in crowdsensing cannot be obtained by each other, and guarantee other workers also difficult to obtain the precise location of any workers. In addition, as workers send the sensing result to the publisher actively this scheme can also increase the probability of workers’ participation potentially. At last, the theoretical privacy preservation ability of AOTC is analyzed in the section on security analysis with three types of privacy threats. Then the performance of AOTC is compared with other similar schemes in both privacy preservation and execution efficiency, so in simulation experiments, comparison results with brief analyses will confirm that the AOTC has achieved the desired effect and will further demonstrate the superiority.

The emergence of complexity is investigated from the viewpoint of the energy balance property and the divergence property of reaction–diffusion cellular neural networks.

Recent observations of blazars at high energy (0.1–100 GeV) and very high energy (> 0.1 TeV) have provided important constraints on the intensity and spectrum of the diffuse extragalactic background light (EBL), shedding light on its main origin. Several issues remain open, however, in particular in the mid- and far-infrared bands and in the blazar emission at multi-TeV energies. This review summarizes the observational and theoretical progress in the study of the EBL with gamma-rays and the most promising future improvements, which are mainly expected from spectra in the multi-TeV range.

Postural stability assessments are typically used for training and tracking. The training results of stroke patients are investigated in terms of task execution and experimental methods. However, the selection of evaluation and training tools has not been discussed in depth. To explore the postural stability evaluation index, we used a range of widely applied assessment tools in occupational therapy. Methods: We studied the rehabilitation of 15 patients who had suffered chronic strokes for at least two years. The tools include the Timed Up and Go Test, which is used by rehabilitation professionals in postural stability evaluations, the biodex balance evaluation instrument, and a Kinect game developed for virtual reality therapy. Results: We propose an active and a passive assessment model. For training, we recommend combining active and passive assessments for confirmations. For assessments, the evaluation tool should be selected according to the postural stability task (active or passive). In the predictive models, if the different tools are considered simultaneously, static postural stability should be used as the main investigation. We suggest that by first studying the tools used to investigate postural stability assessments, balance assessments in stroke patients can also be improved.

The BL Lac object 3C 66A was the target of an intensive multiwavelength monitoring campaign organized in 2003–2004. During the campaign, its spectral energy distribution (SED) was measured and flux measurements from radio to X-ray frequencies as well as upper limits in the very high energy (VHE) γ-ray regime were obtained. Here, we reproduce the SED and optical spectral variability pattern observed during our multiwavelength campaign using a time-dependent leptonic jet model. Our model could successfully simulate the observed SED and optical light curves and predict an intrinsic cutoff value for the VHE γ-ray emission at ~ 4 GeV.