Optofluidic tunable microlens by manipulating the liquid meniscus using a flared microfluidic structure

We have designed, demonstrated, and characterized a simple, novel in-plane tunable optofluidic microlens. The microlens is realized by utilizing the interface properties between two different fluids: CaCl(2)solution and air. A constant contact angle of ～90° is the pivotal factor resulting in the outward bowing and convex shape of the CaCl(2) solution-air interface. The contact angle at the CaCl(2) solution-air interface is maintained by a flared structure in the polydimethylsiloxane channel. The resulting bowing interface, coupled with the refractive index difference between the two fluids, results in effective in-plane focusing. The versatility of such a design is confirmed by characterizing the intensity of a traced beam experimentally and comparing the observed focal points with those obtained via ray-tracing simulations. With the radius of curvature conveniently controlled via fluid injection, the resulting microlens has a readily tunable focal length. This ease of operation, outstandingly low fluid usage, large range tunable focal length, and in-plane focusing ability make this lens suitable for many potential lab-on-a-chip applications such as particle manipulation, flow cytometry, and in-plane optical trapping.     

Quantum mechanics experiment mimicked by stochastic calculations

The paper presents a stochastic calculations algorithm that mimics the photon polarization experiments of quantum mechanics. This experiment is usually used to introduce the quantum computing approach. Stochastic filters that operate on stochastic numbers in a mode similar to that of polarized filter operation on random polarized photons are introduced.     

Effective Integration of ICT in Jordanian Schools: An Analysis of Pedagogical and Contextual Impediments in the Science Classroom

A series of interviews and classroom observations were conducted with a group of in-service science teachers, students, school principal, and computer lab supervisors, from a “Discovery” female school in Jordan to assess their utilization of information and communication technology (ICT) in teaching science. The study also intended to determine how these participants were using ICT and if they had any internal and external impediments in the way of the effective integration of ICT in the teaching of science. Results showed that some participants were using ICT creatively in their science teaching. However, despite considerable political pressure to increase ICT use in the classroom, most expressed frustration at the lack of ICT tools, support from the school, from the Ministry of Education, and from the surrounding community. The article proposes possible resolutions to help these participants overcome their impediments. Some of the suggested resolutions for the internal impediments include involving teachers in preparing the school’s time-table, equipping the school with more ICT tools and offering more training courses for teachers. However, the suggested resolutions for the external impediments involve (1) The Ministry of Education to rethink the administration of board examinations, (2) The school to sacrifice scoring higher in board examinations for preparing more creative and more versatile students’ perspectives.     

A novel controller for nonlinear uncertain systems using a combination of SDRE and function approximation technique: Regulation and tracking of flexible-joint manipulators

This paper presents a novel combined State Dependent Riccati Equation (SDRE) / Function Approximation Technique (FAT)-based control design for nonlinear uncertain systems. The SDRE is employed to construct an optimal controller and the function approximation technique is utilized to estimate time-varying disturbances and uncertainties. Moreover, a robust term in the proposed control law compensates for the truncation error. The closed-loop stability and boundedness of the tracking error and FAT weights approximation error are proved in the sense of Lyapunov, with consideration of truncation error. Due to the great importance of the adequate performance of transient response from practical point of view, performance evaluation has been accomplished. The proposed scheme is computationally simple due to utilizing the FAT to represent uncertainties and disturbances as a function of time. Compared with the SDRE based SMC, the proposed controller is superior in terms of capability to track a fast and highly complicated trajectory and no need to determine time-varying disturbances and uncertainties bounds. The case study is a Selective Compliant Articulated Robot for Assembly (SCARA) flexible joint manipulator as a representative of highly nonlinear, coupled, large robotic systems. Simulation results easily verify the effectiveness and superiority of the proposed controller.     

The face of digital literacy for Muslim teenage girls: a comparative study of Bradford Muslim girl schools

This paper is grounded in a qualitative approach, to call forth the views of Muslim teenage girls on their access and use of learning technologies for inclusive educational practice. The 45 Muslim teenage girls, aged 14–19 years old, from three British Muslim girls schools participated in this empirical study. Semi-structured interviews were used for data collection and the data were analysed using template analysis, matrix analysis, and cross-case analysis. The pupils had strong aspirations that learning technologies and computers should support their learning and attainment, but their access and use to supporting technologies was mixed. It was found through a comparative analysis of the data that all the Muslim teenage girls that entered Muslim schools felt secure and performed competently. Furthermore, the educational success of School A was attributable to educational norms and values relative to the provision of digital resources and skilled teaching staff. The educational experiences of School B and School C were more variable due to access to digital technologies, provision of digital contents and skilled teaching staff. Furthermore, this research study seems to highlight a marked difference between the Muslim School environment and the social context of teenage girls outside the educational setting.     

Use of social networks and information seeking behavior of students during political crises in Pakistan: A case study

This study was undertaken to investigate the use of social networks and political activism on the Internet by the students of three universities of Islamabad and Rawalpindi during the political crises for the last one year and the emergency imposed by the Government of Pakistan on November 3, 2007. The findings conclude that Internet use by the students promoted democracy, freedom of expression and greater awareness about their rights during the political crises in Pakistan.

The survey method of research was used to collect data. The sample consisted of 420 students studying at the Quaid-e-Azam University Islamabad, Fatima Jinnah Women University, Rawalpindi, and International Islamic University Islamabad, Pakistan. The questionnaire was sent to the students by email. The survey was administered through SurveyMonkey website. The response rate was 72.23%.

The paper is a useful source of information about how the social networking tools have been influencing and changing communication channels in Pakistan.     

Relationship between parenting styles and academic performance of adolescents: mediating role of self-efficacy

The literature supports the importance of parenting styles that are necessary to fulfill the developmental needs of the children and eventually improve their quality of life. Baumrind’s typology of parenting styles was used. There are many studies that examined the relationship of parenting styles (authoritative, authoritarian and permissive parenting styles) and academic performance, but there is lack of measurement of the relationship with respect to Pakistan. Current study analyzed the relationship of parenting styles and academic performance along with self-efficacy as mediating variable. Sample of the study consists of 313 university students from four academic departments. Measures included the parenting styles and self-efficacy. GPA was taken as a measure of academic performance of adolescents. Self-reported questionnaire was used to take the response from students. With the help of structural equation modeling, structural model was tested. Results of the study indicate that parenting styles individually have no significant relationship with the academic performance. In addition to this, self-efficacy only mediates the relationship of authoritative parenting style and academic performance. It can be concluded that self-efficacy in individuals is an important attribute necessary for the psychological development of the adolescents. Self-efficacy enhances the individual’s confidence to progress. There is a need to conduct more research on the relationship of parenting styles and academic performance in Pakistan. Implications for parents, teachers, are discussed.