Archives-January 2014

This study intended to verify the feasibility of laser-arc hybrid welding to dissimilar materials joints between high strength steel (AH32) and stainless steel (STS304L). For this, hybrid welding process for dissimilar materials was optimized by varying four parameters (welding speed, welding current, wire feeding rate, welding voltage) through Grey-based Taguchi analysis. A Grey relational analysis of the ultimate tensile strength (UTS), welding depth to width ratio (D/W) and absorbed energy (AE) attained from the Taguchi method can optimize the multiple-performance characteristics of the Grey relational grade. Moreover, hardness values and fatigue strength of welded joints fabricated under welding condition optimized by Grey-based Taguchi analysis were investigated. From the results, it was found that the initial visual test of the welds could be classified as very stringent (Quality B') in quality levels for weld imperfections based on EN ISO 13919-1. In the tensile test of welded joints, the damaged part was in BM of STS304L side. Tensile strength of welded joints in dissimilar materials was comparable to that of STS304L base material. Hardness values at distances of 3mm and 12mm over the bottom surface of welded joints were in the order of WM > HAZ > BM. The hardness of welded joints exhibits within the acceptable range (the maximum value 340Hv~360Hv). Dissimilar materials hybrid welded joints exhibited almost same fatigue strength for similar material STS304L SAW welded joints and lied well above the design curve(level D) for JSSC.

This experimental work is conducted to find the best paradigms for emergency czommunication systems that are developed in disabled and patient health care. The system must be proficient in avoiding adverse effects due to any misinterpretation that may arise in mis-classification of input. The proposed system works well with the suggested paradigms for the extraction of signals from a wearable hand glove. Each extracted signal spectrum represents the corresponding and precise paradigm feature, suitable for efficient classification. The application of Fast Fourier Transformation on signals to extract these features along with the Linear Discriminant analysis (LDA) resulted in faultless results. The wider differentiation is found in paradigms that depend on finger bustle, and are found less in false acceptance and false rejection in turn in equal error rate. Hence the experimental results prove the feasibility of constructing the efficient and simplified emergency response system for the sick, elderly and the disabled using the well differentiated paradigms.

This study examines the influence of fundamental factors on small equity investor behavior in the context of Pakistan. The fundamental factors considered in this study are social, political, environmental, regulatory, technological, economic and legal, known as SPERTEL factors. Primary data is collected from individual equity investors from all three stock exchanges of Pakistan. Confirmatory factor analysis (CFA) is used to test the validity of the survey instrument, and structural equation modeling (SEM) technique is used to test the hypotheses. The study documents that overall, small equity investor’s decision making is not influenced by fundamental factors. The study found significant influence of social and political factors on small equity investors’ behavior. However, economic, regulatory, technological, environmental and legal factors have no influence on individual equity investor’s decision making behavior in Pakistan.

The leadership of an organization to adapt changes and in order to survive and grow in new environments ,requires specific features that commonly managers face many problems to respond to them .One of the most important features that can help leaders and managers in responding to these changes, is emotional intelligence. Emotional intelligence is a subject that tries to explain and interpret the place of emotions in human capabilities. Managers with emotional intelligence are effective leaders who reach the goals with maximum productivity and employee’s satisfaction and commitment. Due to the importance of emotional intelligence in management, this article examines the dimensions of emotional intelligence in management, leadership growth and development in working environment and emotional intelligence training in the organization.

Social security is an important political issue for any country that brings influential and profound political and legal impacts. Its most important political and legal impact is seen in emergencies when social administrators should manage a crisis in terms of their natural duty. To this end, they inevitably choose to limit their citizens’ personal rights. Since paving proper grounds to exercise personal rights, crisis management and national security are, inter alia, the functions of the governments and the guidelines to provide them are contradictory due to their natures, limiting the domination of personal rights is considered as one the most reasonable guidelines to curb existing problems in a political society. The important issue created by the scope of such limitation in personal rights that causes the biggest challenges to the legitimation of such guidelines during emergencies is the principle of no harm and forbidding harms to other people as a proper criterion for governmental discretion scope in exercising the rules of emergency time and in limiting personal rights.

The need to generate pollution free energy has triggered the effect towards the usage of wind energy interconnection with the grid. Thus, the wind power plants l interfaced with the grid causes the power quality problems such as a harmonics, voltage sag etc., Active power filters are the powerful tool for mitigation of harmonics. This proposed work describes the methodology for improving power quality of the grid system interfaced with renewable energy. The inverter used this methodology can also be used as a power converter for injecting power from RES to grid along with harmonic compensation. This concept is validated through dynamic simulation using MATLAB/Simulink Power system toolbox.

Language and culture are intricately interwoven and inseparable. This paper tries to express that languages have significant effects on cultures and languages also are under impact of cultures. To express this mutual relationship, sociological and anthropological views in this relation are provided in this paper. It surveys the importance of culture in linguistic communication and in foreign language learning and explains about key concepts in language use and cultural knowledge.

Water pollution is a major global problem that requires ongoing evaluation and revision of water resource policy at all levels (from international down to individual aquifers and wells). It has been suggested that it is the leading worldwide cause of deaths and diseases, and that it accounts for the deaths of more than 14,000 people daily. In addition to the acute problems of water pollution in developing countries, industrialized countries continue to struggle with pollution problems as well. Water quality issues are a major challenge that humanity is facing in the twenty-first century. Here, we review the main groups of aquatic contaminants, their effects on human health, and approaches to mitigate pollution of freshwater resources. Emphasis is placed on chemical pollution, particularly on inorganic and organic micro-pollutants including toxic metals and metalloids as well as a large variety of synthetic organic chemicals. Some aspects of waterborne diseases and the urgent need for improved sanitation in developing countries are also discussed. The review addresses current scientific advances to cope with the great diversity of pollutants. It is organized along the different temporal and spatial scales of global water pollution. Persistent organic pollutants (POPs) have affected water systems on a global scale for more than five decades; during that time geo-genic pollutants, mining operations, and hazardous waste sites have been the most relevant sources of long-term regional and local water pollution. Agricultural chemicals and waste-water sources exert shorter-term effects on regional to local scales.

Purpose of the paper is to examine the presence of market anomalies and how stock prices are affected due to market anomalies which may affect investors’ returns. It is a conceptual paper and it will definitely helpful to know how market anomalies affect the concept of efficient market hypothesis and importance of anomalies for the investors while decision making. In literature there are contradictory views for negative Monday anomaly and Positive January anomaly and this paper put the attention of investors on the factors that cause financial anomalies. It is proposed that we can find more accurate results about negative Monday anomaly and Positive January anomaly if different sectors of the economy will be observed separately.

During centuries many scholars and professionals in translation have suggested many theories in general sense and the best approach was always a controversial issue. In this paper, an attempt has been made to define theory in scientific sense which is totally different from its general sense. It shows that based on lack of necessary features of scientific theory, there is no translation theory and what exist are just different approaches and models to translation. Then approaches based on different insights such as philological, linguistic and sociosemiotic insights will be studied.