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Enhancing the problem-solving skills of learners belonging to socio-economically disadvantaged groups is a great concern in general and particularly in the Indian context. Problem-solving skills are the most important skills of the 21st century for all learners to acquire necessary competencies. The main purpose of this work is to investigate the effect of metacognitive brainstorming strategy, gender, and residential areas, and their various interactions on problem-solving skills in physics for ninth-grade learners who belong to socio-economically marginalised groups. The pre-test--post-test, quasi-experimental design was applied to 107 learners from two government-sponsored schools of the same nature located in Kolkata, West Bengal, India. The 55 learners in the experimental group were given intervention through a metacognitive brainstorming strategy, whereas the 52 learners in the control group were taught the same lessons by simply using the conventional method. Self-developed and standard problem-solving skills test with a reliability of 0.89 and validity of 0.94 were employed on them as pre-test and post-test instances. The correlated t-test, independent samples t-test, and 2 x 2 factorial design analysis of covariance were applied for data analysis through Statistical Package for Social Science. The results revealed that the brainstorming instructional strategy had a huge effect on problem-solving skills due to its large effect size value (2.23 > 1.2). Moreover, the problem-solving skills of learners in physics were found to be independent of gender and residential areas, and also of their interaction with the treatment strategy, when the pre-problem-solving skill was taken as a covariate.

Resonant second harmonic generation by a Gaussian laser beam in a rippled density plasma is studied using the moment theory approach. The nonlinearity arises through the relativistic mass effect and ponderomotive forces. The laser beam creates a plasma channel and gives rise to electron density perturbation at the laser frequency. The density perturbation beats with electron quiver velocity to produce second harmonics. The ripple provides phase matching and makes the process a resonant one. The second harmonic power efficiency is increased effectively with density ripple. Self‐focusing causes enhancement in the efficiency of harmonic generation. [ABSTRACT FROM AUTHOR]

Adolescence, the transition period between childhood and adulthood, is a period of great risks and possibilities. Teen years comprise a period of intense growth not only physically but also morally and intellectually. The adolescence has traditionally been portrayed as a state of internal civil war. In the period of revolutionary change, social competence refers to the social, emotional, and cognitive skills and behaviors that child need for successful social adaptation. So in this critical period of change, parents have to deal their child with proper guidance, love, and sympathy to enable his or her to tackle various problems of adolescence of his or her life. This may successfully bring about the welfare of the society and help the child to grow into the distinct individual. In this paper, an attempt is made to explore the connection between parental role and development of social competence among adolescents using effective tools covering various dimensions. A sample of 160 adolescent students of various schools of Ajmer district of India in the age group of 13 to 18 years was randomly selected covering male-female students, rural-urban students, and students of government and private schools. Tools developed for parental role scale and social competence scale were administered. Various statistical techniques were applied on the data collected. ANOVA test results show that three groups of parental role, e.g., higher parental role group, average parental role group, and lower parental role group, significantly differ in achieving social competence. Based on the findings, the paper presents educational implications. [ABSTRACT FROM AUTHOR]