Theory-based Change and Change-based Theory: Going Deeper, Going Broader

This article examines the questions of sustaining and extending theory-based educational change reforms, which are designed by laboratories outside of schools and whose motivating theoretical base assumes change in elemental aspects of classroom practice. This article defines sustainability of theory-based reform as more than maintaining current implementation, rather as deepening reforms in ways that allow for flexible response to changes in student, curricular, and school contexts. It draws upon five years of research in schools and classrooms engaged in one of three theory-based reforms to discuss five essential factors affecting sustainability: resources, reformers' learning, knowledge of the first principles of the reform and the support of a community of practice, the principal, and the district. This article then turns to ``scaling up.' Rather than merely replicating structures, extending theory-based reform to new sites requires building compatibility between the normative base of the reform with that in the classrooms, schools and districts in which they are growing as well as the capacity of the classroom, school, and district to see it through. This article suggests three main factors that reform founders must focus upon to scale up their reforms – attention to site selection, a proactive stance toward district contexts, and planned transfer of authority. The article concludes that issues of invention, implementation, sustainability, and scale occur simultaneously when going deeper and broader with theory-based change.     

Coverage of the Surgical Strike on Television News in India

On 29 September 2016, the Indian army conducted a surgical strike along the India–Pakistan border. The mainstream news media in India followed the event with assertive nationalistic rhetoric. What was supposed to be a covert military operation against terrorism became morphed into political rhetoric aggravated by the unwarranted jingoism of television news channels and social media. The coverage of the strike on television news is typically characterized by a confluence of militant nationalist discourses, and the ideologically imbued labelling of specific communities. Within this context, drawing from the close reading of the coverage, this article analyses how Indian television news sustains the construction of a fictive “we”, conflated with the government policies and military strategies, and speaks for a supposedly homogeneous national consensus that also consciously obscures the dissent through minority voices. The article emphasizes the relationship between communities, formal politics, and the supposedly non-political spaces and practices of news media in India.     

Children and the Internet: experiments with minimally invasive education in India

Urban children all over the world seem to acquire computing skills without adult intervention. Indeed this form of self-instruction has produced hackersÑchildren who can penetrate high tech security systems. Is this kind of learning dependent only on the availability of technology? We provided slum children in New Delhi with Internet access in their settlement. The paper describes the results obtained in the first month of unsupervised and unguided access. It is observed that children seem to understand and use the technology fluently. Language and formal education do not seem to make any significant difference.     

The D-region of the ionosphere

The D-region of the ionosphere, traditionally defined as the region of ionization below 100 km, is a link between the non-ionized stratosphere below and the dense plasma above. In it, minor neutral constituents play a dominant role and chemical reactions, both neutral and ionic, are dominant. It plays a very important role in the propagation of radiowaves at all frequencies below 30 MHz, and is particularly important in effecting communication over areas of the earth, such as polar regions, that are inaccessible to synchronous satellite links.     

Role of Oncofetal Protein CR-1 as a Potential Tumor Marker for Oral Squamous Cell Carcinoma

Cripto-1 (CR-1) is an oncofetal protein with its role as a key factor in early process of carcinoma has been evaluated in cases of various cancers. However, very few studies have reported its role in oral cancer, which is the sixth most common cancer around the world, particularly with high prevalence in developing countries. Oral squamous cell carcinoma (OSCC) is the most predominant (90%) of all the histological types of oral cancer. Late detection, associated with increased morbidity and mortality, is mainly attributed to non-availability of a suitable biomarker for the disease. In the present pilot study, we have evaluated the role of soluble CR-1, in serum as a potential tumor marker for OSCC. CR-1 was estimated using sandwich ELISA in serum samples of 50 biopsy proven OSCC patients (pre and post treatment) along with age and gender matched healthy controls. Immunohistochemistry was also done in corresponding tumor tissue sections to check the expression of CR-1. Pre-treatment CR-1 was found to be 2.25-fold higher in serum of OSCC patients as compared to control (p < 0.0001***), which was reduced to 1.6 folds post treatment (p = 0.0006***). CR-1 levels were comparatively higher in early stage of disease. Upon IHC 80% of the cases were found to be positive for CR-1. This study provides evidence that serum levels of CR-1 are elevated in patients of Oral Squamous Cell Carcinoma, which decrease post treatment. Also, the association of expression of protein with tumor progression predicts CR-1 as a molecule that can be further evaluated as a potential tumor maker in OSCC.     

Attitudes on Barriers and Benefits of Distance Education among Mississippi Delta Allied Health Community College Faculty,Staff, and Students

Online distance education creates increased opportunities for continuing education and advanced training for allied health professionals living in underserved and geographically isolated areas. The purpose of this article was to explore attitudes on barriers and benefits of distance education technology among underrepresented minority allied health students. It also addressed potential issues to geographic isolation that may contribute to the shortage of adequately trained health professionals in the Mississippi Delta. Community college students, faculty, and staff of Mississippi Delta allied health programs were interviewed about their experience, barriers and benefits to participation, and self efficacy with distance education. Four focus groups meetings with 34 participants were conducted to understand perceptions of community college students and professionals about distance education. Exposure to and experience with online and distance learning format, frequent Internet usage, and plans to matriculate to a four-year university are significant factors when examining attitudes on barriers and benefits. Faculty and staff perceive that community college students would be more confident during discussions in an online environment; that an online class will reduce out-of-pocket educational expenses; and online learning will save time by making all course materials accessible from one webpage. Attitudes on benefits to distance education should be evaluated to assess whether distance education programs meet the needs of the students in underserved areas.     

Acquisition of computer literacy skills through self-organizing systems of learning among children in Bhutan and India

This article describes a study under the Reaching the Unreached component of the Chiphen Rigpel project between the governments of Bhutan and India. This initiative is an attempt to provide computer literacy to children of Bhutan through setting up “hole in the wall” (HiWEL) Playground Learning Station(s) (PLSs). The study described here involves 14 sites (the experimental group), where PLSs are installed, and another 8 sites (the control group) without PLSs, but having similar demographic and socioeconomic profiling as the experimental group. This article compares the acquisition of computer literacy of school-going children in India with those in Bhutan. Results indicate that Bhutanese children have acquired computer literacy on their own and that their level of computer skills acquisition is similar to that of Indian children when the scores are normalized. This study was done over a one-year period, with results reported for eight months. In addition to verifying the earlier Indian results, this article hints at the fact that, irrespective of ethnicity, culture, and country, an identical—and possibly universal—self-organized learning mechanism seems to work with children vis-à-vis the Internet.     

Optimization of total harmonic current distortion and torque pulsation reduction in high-power induction motors using genetic algorithms

This paper presents a powerful application of genetic algorithm （GA） for the minimization of the total harmonic current distortion （THCD） in high-power induction motors fed by voltage source inverters, based on an approximate harmonic model. That is, having defined a desired fundamental output voltage, optimal pulse patterns （switching angles） are determined to produce the fundamental output voltage while minimizing the THCD. The complete results for the two cases of three and five switching instants in the first quarter period of pulse width modulation （PWM） waveform are presented. Presence of harmonics in the stator excitation leads to a pulsing-torque component. Considering the fact that if the pulsing-torques are at low frequencies, they can cause troublesome speed fluctuations, shaft fatigue, and unsatisfactory performance in the feedback control system, the 5th, 7th, 1 lth, and 13th current harmonics （in the case of five switching angles） are constrained at some pre-specified values, to mitigate the detrimental effects of low-frequency harmonics. At the same time, the THCD is optimized while the required fundamental output voltage is maintained.     

Modeling of dielectrophoretic transport of myoglobin molecules in microchannels

Myoglobin is one of the premature identifying cardiac markers, whose concentration increases from 90 pg∕ml or less to over 250 ng∕ml in the blood serum of human beings after minor heart attack. Separation, detection, and quantification of myoglobin play a vital role in revealing the cardiac arrest in advance, which is the challenging part of ongoing research. In the present work, one of the electrokinetic approaches, i.e., dielectrophoresis (DEP), is chosen to separate the myoglobin. A mathematical model is developed for simulating dielectrophoretic behavior of a myoglobin molecule in a microchannel to provide a theoretical basis for the above application. This model is based on the introduction of a dielectrophoretic force and a dielectric myoglobin model. A dielectric myoglobin model is developed by approximating the shape of the myoglobin molecule as sphere, oblate, and prolate spheroids. A generalized theoretical expression for the dielectrophoretic force acting on respective shapes of the molecule is derived. The microchannel considered for analysis has an array of parallel rectangular electrodes at the bottom surface. The potential and electric field distributions are calculated using Green’s theorem method and finite element method. These results also compared to the Fourier series method, closed form solutions by Morgan et al. [J. Phys. D: Appl. Phys. 34, 1553 (2001)] and Chang et al. [J. Phys. D: Appl. Phys. 36, 3073 (2003)]. It is observed that both Green’s theorem based analytical solution and finite element based numerical solution for proposed model are closely matched for electric field and square electric field gradients. The crossover frequency is obtained as 40 MHz for given properties of myoglobin and for all approximated shapes of myoglobin molecule. The effect of conductivity of medium and myoglobin on the crossover frequency is also demonstrated. Further, the effect of hydration layer on the crossover frequency of myoglobin molecules is also presented. Both positive and negative DEP effects on myoglobin molecules are obtained by switching the frequency of applied electric field. The effect of different shapes of myoglobin on DEP force is studied and no significant effect on DEP force is observed. Finally, repulsion of myoglobin molecules from the electrode plane at 1 KHz frequency and 10 V applied voltage is observed. These results provide the ability of applying DEP force for manipulating nanosized biomolecules such as myoglobin.