Dynamics of a Worm Propagation Model with Quarantine in Wireless Sensor Networks

We study the attacking behavior of possible worms inWireless Sensor Network (WSNs). Using epidemic theory, we propose a susceptible-infectious-quarantine-recovered (SIQR)model to describe dynamics of worms propagation with quarantine in the wireless sensor network. Mathematical analysis shows that dynamics of the spread of worms are determined by the threshold R0. If R0 ≤ 1, the worm-free equilibrium is globally asymptotically stable, and if R0 \u3e 1, the worm-endemic equilibrium is globally asymptotically stable. Lyapunov functional method as well as geometric approach are used for proving the global stability of equilibria. A numerical investigation is carried out to confirm the analytical results. As a result of parameter analysis, some effective strategies for eliminating worms are suggested

Walsh spectral techniques for logic synthesis FPGA

The implementation value of multi-output Boolean functions in logic synthesis FPGA can be reduced by using Walsh spectral representation. This paper proposes an algorithm for calculating the maximum coefficient of the autocorrelation function of BF without generating a truth table, using the heuristic procedure limits the maximum autocorrelation coefficients of sorting on a small subset of the function. We also suggest a spectral technique of the linear function transformation defined by disjoint cubes. This method for decomposition of BF, which allows to reducing the complexity of the linear part of the corresponding blocks about 25-55%, and the complexity of the nonlinear part of the blocks do not increase more than 10%, compared to the traditional approach

The immortality of the soul: a relevant doctrine for contemporary Christianity?

Thesis advisor: Felix J. Palazzi von BurenThesis advisor: Brian DunkleThesis (STL) — Boston College, 2020.Submitted to: Boston College. School of Theology and Ministry.Discipline: Sacred Theology

Minimize Logic Synthesis FPGA – Extraction And Substitution Problems

The objective of multi-level logic synthesis of FPGA is to find the “best” multi-level structure, where “best” in this case means an equivalent presentation that is optimal with respect to various parameters such as size, speed or power consumption... Five basic operations are used in order to reach this goal: decomposition, extraction, factoring, substitution and collapsing. In this paper we propose a novel application of Walsh spectral transformation to the evaluation of Boolean function correlation. In particular, we present an algorithm with approach to solve the problems of extraction and substitution based on the use of Walsh spectral presentation. The method, operating in the transform domain, has appeared to be more advantageous than traditional approaches, using operations in the Boolean domain, concerning both memory occupation and execution time on some classes of functions

Questionnaire Designing on the Pharmaceutical Supply Chain Model: A Pilot Study in Ho Chi Minh City, Vietnam

Vietnam’s pharmaceutical industry has the potential to create value for the nation. Impact of the COVID-19 epidemic in Vietnam's pharmaceutical industry. This study was conducted on a pilot scale, and we did develop a questionnaire that was sent to pharmacists working in different hospitals in Ho Chi Minh City. This study aimed to create a questionnaire to explore those criteria given the importance of the hospital pharmaceutical supply chain. A well-designed and original questionnaire from which the researcher can conduct a large-scale formal survey. This study targeted a small group of diseases in Ho Chi Minh City. We developed a questionnaire for pharmacists working in the department pharmacy of the hospital and collected responses accordingly. As a result, we have identified and built a questionnaire with 45 observed variables. The study showed that the acceptance level of the observed variables reached the Cronbach's Alpha confidence level above 0.7 and the Corrected Item - Total Correlation value of the accepted observed variable over 0.3. Research results with the absolute value of factor loading above 0.5 are optimal, and the observed variables are statistically significant. This study has identified the observed variables for the factors of the theoretical framework. The study results can establish a measurement for further quantitative research with an expanded research scope in the future

PROPOSING MODEL OF HANDLING LANGUAGE FOR SMART HOME SYSTEM CONTROLLED BY VOICE

Voice interaction control is a useful solution for smart homes. Now it helps bring the house closer to people. In recent years, many smart home-based voice control solutions have been introduced (for example: Google Assistant, Alexa Amazon etc.). However, most of these solutions do not really serve Vietnamese people. In this paper, we study and develop Vietnamese language processing model to apply to smart home system. Specifically, we propose language processing methods and create databases for smart homes. Our main contribution of the paper is the Vietnamese language processing database for smart-home system

Red-emitting Ba2Si5N8Eu2+ conversion phosphor: A new selection for enhancing the optical performance of the in-cup packaging MCW-LEDs

In this research, the influence of the red-emitting Ba2Si5N8Eu2+ convention phosphor on the optical performance of the 7,000K and 7,700K in-cup packaging multi-chip white LEDs (MCW-LEDs) is investigated. The effect of the red-emitting Ba2Si5N8Eu2+ convention phosphor is demonstrated based on Mie Theory by Mat Lab and Light Tools software. The research results indicated that the optical performance of MCW-LEDs was crucially affected by the red-emitting Ba2Si5N8Eu2+ phosphor's concentration. This paper provides an essential recommendation for selecting and developing the phosphor materials for MW-LEDs manufacturing.Web of Science51art. no. 148615

Effect of the green-emitting CaF2:Ce3+,Tb3+ phosphor particles’ size on color rendering index and color quality scale of the in-cup packaging multichip white LEDs

In this paper, we investigate the effect of the green-emitting CaF2:Ce (3+), Tb (3+) phosphor particle's size on the color rendering index (CRI) and the color quality scale (CQS) of the in-cup packaging multichip white LEDs (MCW-LEDs). For this purpose, 7000K and 8500K in-cup packaging MCW-LEDs is simulated by the commercial software Light Tools. Moreover, scattering process in the phosphor layers is investigated by using Mie Theory with Mat Lab software. Finally, the research results show that the green-emitting CaF2: Ce (3+), Tb (3+) phosphor's size crucially influences on the CRI and CQS. From that point of view, CaF2: Ce (3+), Tb (3+) can be proposed as a potential practical direction for manufacturing the in-cup packaging phosphor WLEDs.Web of Science13235134

Misalignment fading effects on the ACC performance of relay-assisted MIMO/FSO systems over atmospheric turbulence channels

The continuous development of internet of things (IoT) technology enables many devices to be interconnected through the external environment. Meanwhile, 5G technology provides an enhanced quality of services with high data transmission rates, requiring IoT implementation in the 5G architecture. Free-space optical communication (FSO) is considered a promising technique that can provide high-speed communication links, so FSO is an optimal choice for wireless networks to fulfill the full potential of 5G technology, providing speeds of 100 Gb/s or more. By implementing 5G features in IoT, IoT coverage and performance will be enhanced by using FSO models. Therefore, the paper proposed and investigated the multiple-input and multiple-output/free-space optical communication (MIMO/FSO) model using subcarrier quadrature amplitude modulation (SC-QAM) and relay stations over atmospheric turbulence channels by log-normal and gamma-gamma distribution under different turbulence conditions. The performance is examined based on the average channel capacity (ACC), which is expressed in terms of average spectral efficiency (ASE) parameters while changing the different parameters of the model. The mathematical formulas of ACC for atmospheric turbulence cases are calculated and discussed the influence of turbulence strength, the different number of relay stations, misalignment effects, and different MIMO configurations