Electronically Tunable Resistorless Mixed Mode Biquad Filters

This paper presents a new realization of elec¬tronically tunable mixed mode (including transadmittance- and voltage-modes) biquad filter with single input, three outputs or three inputs, single output using voltage differ-encing transconductance amplifier (VDTA), a recently introduced active element. It can simultaneously realize standard filtering signals: low-pass, band-pass and high-pass or by selecting input terminals, it can realize all five different filtering signals: low-pass, band-pass, high-pass, band-stop and all-pass. The proposed filter circuit offers the following attractive feature: no requirement of invert-ing type input signal which is require no addition circuit, critical component matching conditions are not required in the design, the circuit parameters ω0 and Q can be set orthogonally or independently through adjusting the bias currents of the VDTAs, the proposed circuit employs two active and minimum numbers of passive components. Fur-thermore, this filter was investigated from the point of view of limited frequency range, stability conditions, effects of parasitic elements and effects of non-ideal and sensitivity. Thus, taking these effects and conditions into considera¬tion, working conditions and boundaries of this filter are determined. We also performed Monte Carlo, THD and noise analyses. Simulation results are given to confirm theoretical analyses

Reflection and transmission in the ionosphere considering collisions in a first approximation

Reflection and transmission coefficients (R and T) of high frequency waves propagating in the ionosphere are studied taking collisions into account. This was done approximating the expression in the refractive index using binomial expansion and neglecting terms of order higher than is the ratio between the electron collision frequency and the wave frequency. R and T height profiles were assessed using the International Reference Ionosphere, IRI, to estimate the ionosphere plasma parameters. Although no significant differences are found between the estimation with and without collisions, the method employed to include collisions may be useful for other purposes where collisions should be taken into account.Fil: Yesil, Ali. Firat University; TurquíaFil: Aydogdu, Mehmet. Firat University; TurquíaFil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Postsecondary Education Organization, Management, Leadership Understanding Universal Design in Postsecondary Education Through Literature Review

Postsecondary Education Organization, Management, Leadership Understanding Universal Design in Postsecondary Education Through Literature Revie

Bilingual instruction in early childhood education, can it better develop children?

This is a case study of teaching and learning using bilingual instruction in two schools of Early Childhood Education in Kupang-NTT, Indonesia. The aims of this study are to find out whether or not bilingual instruction in Early Childhood Education can better develop children (the outcomes) and if the issue of ‘the younger, the better” in children’s language acquisition in bilingual setting is acceptable and true. 4 students from one bilingual and one monolingual schools have been observed. In addition, parents and teachers of these students have also been interviewed. The data has then been analyzed qualitatively to come to the answers of the proposed questions, and the results reveal that bilingual instruction alone does not necessarily create better children unless it is supported by other factors, such as encouraging parents, professional teachers, and supporting environment. This is in a line with the findings of the issue about ‘the younger, the better’ in children’s language acquisition, that the younger does not always mean the better. Other aforementioned factors are needed in the development of children’s language acquisition. It’s recommended that all parties involved in children’s development can take part in developing their skills, knowledge as well as characters

The impact of Cultural Intelligence (CQ) on Cross-Cultural Job Satisfaction (CCJS) and International Related Performance (IRP)

Cultural Intelligence (CQ) referring to the adaptation to cross-cultural situation, interacting and working effectively in cross-cultural situations is the subject of this study. Globalization and international activities of companies have increased the cross-cultural interaction and commercial links, which in turn have resulted in the need for knowledge and competence about different culture. Within these dynamics, the success of the managers who are in charge of international activities depends on their CQ. The studies related to CQ reveal that it helps to cope with multi-cultural situations, to perform in culturally diverse work groups, to manage culture shock and facilitate effective cross-cultural adjustment, decision making and performance. This study particularly investigates the role of CQ on Cross-Cultural Job Satisfaction (CCJS) and International Related Performance (IRP). The study also looks at the link between CCJS and IRP. A research model along with the related hypotheses was developed and tested based on the data collected through survey method from textile companies in Turkey. The results reveal that CQ is positively related to CCJS. The partial support is also obtained from the data regarding the link between CQ and IRP. In addition, the research finds no relationship between CCJS and IRP. The findings are discussed in relation to theory and practice in the conclusion part of the study