Elimination Of Root Research Articles

Overview of Different Approaches in Numerical Modelling of Reflow Soldering Applications

This paper gives a review of different applications in the numerical modelling of reflow soldering technology from recent years. The focus was on detailing the different process types, the physical background, and related mathematical models. Reflow soldering is the main connection technology of surface mounting. Firstly, the solder in paste form is stencil-printed onto the solder pads of the applied substrate, and then surface mounted devices are placed onto the solder deposits. Finally, the whole assembly is heated over the melting temperature of the solder alloy, which melts and forms solder joints. Surface mounting technology needs a low defect rate which is determined by process parameters, material properties, and the printed circuit board design. Accompanying the experiment and measurement, the identification and elimination of root causes can be effectively improved with numerical modelling, which also grants details to such physical mechanisms that are not even conventionally measurable. This paper is dealing with the following topics from the modelling point of view: an introduction of the different reflow technologies; a brief introduction of primary partial differential equations and calculation procedures; heat transfer mechanisms and thermomechanical stresses; and a brief summary of the results of selected studies. A short overview is also given about soft computing methods applied in reflow process optimisation.

Frequency and power estimation of sinusoids using eigen-approach

Frequency and power estimation of sinusoidal signals, has captured the attention of researchers due to its important applications. This paper involves a frequency and power estimation method of unidentified number of source sinusoidal signals using Eigen technique. The eigenvector corresponding to the correlation matrix’s minimum eigenvalue yields the minimum power of the FIR filter’s output power. The corresponding roots are determined using the filter polynomial and root elimination technique is used to determine the pseudospectrum. Consequently, by deploying the pseudospectrum and filter polynomial, the real power spectrum is derived.

Analyzing the barriers of green textile supply chain management in Southeast Asia using interpretive structural modeling

Southeast Asian countries have become the production hub of lean textile and apparel supply chain. Textile supply chain consumes huge amount of natural resources and emits polluting effluents and gases creating serious environmental and human health concerns. Green design, green procurement, green operations and green transportation are the major areas of green supply chain management. This paper attempts to analyze the important barriers of green textile and apparel supply chain management in Southeast Asian countries. Twelve important barriers have been identified through literature review and questionnaire survey. Interpretive structural modeling (ISM) has been used to decipher the contextual relationships among the barriers. Complexity of green process and system design was found to be the most elementary barrier having the maximum driving power. Lack of consumer support and encouragement, lack of guidance and support from regulatory authorities and high implementation and maintenance cost are the other elementary barriers of green textile supply chain. Lack of green suppliers is the most dependent barrier which is influenced by all other barriers considered in this research. Elimination of root causes or driving barriers are paramount to save the environment. Concerted efforts in terms of green technological innovation, consumers’ awareness and support of the regulatory bodies are needed for effective implementation of green supply practices in textile and apparel supply chains.

«SOFT POWER» AGAINST OF RELIGIOUS TERRORISM IN INDONESIA

The article describes the Indonesian Government using non-violent methods in withstanding the spread of radicalism in contemporaryIndonesia. The article analyzes the development of de-radicalization program aimed at the rehabilitation of the former terrorists and supporters of violent methods of the Islamization of the country — the jihadists. The main tools are such methods of struggle against terrorism and extremism, as de-radicalization, rehabilitation and reintegration into society, and most importantly — the elimination of roots and causes of terrorism. This article provides details on how the use of the “soft power” in withstanding extremism works, as well as successes and difficulties in implementing this program.