Rapid multi sample DNA amplification using rotary-linear polymerase chain reaction device (PCRDisc)

Multiple sample DNA amplification was done by using a novel rotary-linear motion polymerase chain reaction (PCR) device. A simple compact disc was used to create the stationary sample chambers which are individually temperature controlled. The PCR was performed by shuttling the samples to different temperature zones by using a combined rotary-linear movement of the disc. The device was successfully used to amplify up to 12 samples in less than 30 min with a sample volume of 5 μl. A simple spring loaded heater mechanism was introduced to enable good thermal contact between the samples and the heaters. Each of the heater temperatures are controlled by using a simple proportional–integral–derivative pulse width modulation control system. The results show a good improvement in the amplification rate and duration of the samples. The reagent volume used was reduced to nearly 25% of that used in conventional method.     

Training teachers to use new technologies impacts multiple ecologies: Evidence from a national initiative

A pair of papers re-examined the evidence from a national initiative to train all teachers in England to bring them up to the level of newly qualified teachers, who are required to know when to use and when not to use information and communication technologies (ICT) in their professional practice. The first paper confirmed that multilevel evaluation of professional development was robust for ICT teacher training. This second paper contrasts the highest and lowest rated designs for ICT teacher training: an 'organic' approach that provided training in schools was highly rated, whereas a centralised computer-assisted learning approach with online access to trainers was the lowest rated design. The study supports an ecological view of the diffusion of ICT innovations in education and recommends that ICT teacher training be designed to support evolution of each teacher's classroom, school and region, as well as the training of the ICT teacher trainers.     

Teachers’ Perceptions of the Use of Computer Assisted Language Learning to Develop Children’s Reading Skills in English as a Second Language in the United Arab Emirates

This study investigated ESL teachers’ perceptions regarding the use of Computer Assisted Language Learning (CALL) in teaching reading to children. A random sample of 145 teachers participated in the study by completing a survey developed by the researchers. To explore the situation in depth, 16 teachers were later interviewed. Results indicated that the main purpose of using CALL with children is to help them develop reading strategies and increase their motivation. The most common strategies teachers reported using were computers to: enhance children's reading skills, support children's reading, listen to stories read aloud, recognize letter/sound relationships, and identify letters and beginning sounds of words. Teachers reported that CALL has some benefits, such as providing opportunities for active interaction and differentiated instruction. The main barriers of using CALL are the lack of resources and suitable software and hardware. The study ended with recommendations for further research and instructional improvements.     

Multidimensional model to assess the readiness of Saudi Arabia to implement evidence based child maltreatment prevention programs at a large scale

There has been increased awareness of child maltreatment in Saudi Arabia recently. This study assessed the readiness for implementing large-scale evidence-based child maltreatment prevention programs in Saudi Arabia. Key informants, who were key decision makers and senior managers in the field of child maltreatment, were invited to participate in the study. A multidimensional tool, developed by WHO and collaborators from several middle and low income countries, was used to assess 10 dimensions of readiness. A group of experts also gave an objective assessment of the 10 dimensions and key informants’ and experts’ scores were compared. On a scale of 100, the key informants gave a readiness score of 43% for Saudi Arabia to implement large-scale, evidence-based CM prevention programs, and experts gave an overall readiness score of 40%. Both the key informants and experts agreed that 4 of the dimensions (attitudes toward child maltreatment prevention, institutional links and resources, material resources, and human and technical resources) had low readiness scores (<5) each and three dimensions (knowledge of child maltreatment prevention, scientific data on child maltreatment prevention, and will to address child maltreatment problem) had high readiness scores (≥5) each. There was significant disagreement between key informants and experts on the remaining 3 dimensions. Overall, Saudi Arabia has a moderate/fair readiness to implement large-scale child maltreatment prevention programs. Capacity building; strengthening of material resources; and improving institutional links, collaborations, and attitudes toward the child maltreatment problem are required to improve the country's readiness to implement such programs.     

Peer Problems and Hyperactivity–Impulsivity Among Norwegian and American Children: The Role of 5‐HTTLPR

Peer problems are linked to attention deficit hyperactivity disorder (ADHD) symptoms and the serotonin system is thought to be involved in ADHD‐related behavior. Hence, from a Gene × Environment perspective, the serotonin transporter 5‐HTTLPR may play a moderating role. In two large community samples, the moderating role of 5‐HTTLPR was examined related to more hyperactivity–impulsivity symptoms (HI symptoms) predicted by more peer problems. In Study 1, involving 642 Norwegian children, results indicated that for s‐allele carriers only, caregiver‐reported peer problems at age 4 predicted more parent‐reported HI symptoms at age 6. In Study 2, similar results emerged involving 482 American children. Discussion focuses on differential sensitivity to the adverse effects of poor peer relations.     

A Sample Science Education Activity in Multicultural Environment

In this study, a sample activity developed in the workshops called ＂Science education in multicultural environment＂ of the program ＂Integrative teaching in multicultural environment＂ was presented. Workshops about varied subjects were carried out by participants representing four countries and participants developed teaching materials by getting benefit from elements special to their cultures in the ones related to science teaching. Two students from Belgium, one student from Denmark, one student from Latvia and five students from Turkey participated in the study and three Turkish academicians conducted the workshops. The outcomes of the study were evaluated by presenting them to all participants. The workshops were designed to help students learn instructional strategies and draw upon their prior learning experiences in order to apply effective multicultural education teaching activities. Emphasis is also placed on understanding the varied backgrounds and needs of students.     

Optimal control of a distributed parameter system with applications to beam vibrations using piezoelectric actuators

This paper addresses the issue of the active vibration control of the transverse modes in a flexible elastic systems. The control is implemented by discrete sets of piezoelectric actuators that apply the optimal forces. The performance index is a time-dependent quadratic functional of state variables and their time derivatives, and control forces which are determined by minimizing the objective functional subject to a penalty term on the control functions. A combination of Galerkin and variational approaches are employed to determine the control forces in the time domain explicitly in terms of coupled amplitudes and velocities. The effectiveness of the proposed method is demonstrated by applying it to a physical problem controlled by piezoelectric patch actuators.     

Books Received

Abstract

This paper analyses the organizational, financial and technological incentives that service organizations used to motivate farmers to finance agricultural research and extension in Benin. Understanding the foundations and implications of these motivation systems is important for improving farmer financial participation in agricultural research and extension.

We studied three cases of farmer financial participation in the field of agricultural research and extension in Benin. We conducted semi-structured interviews with leaders of service organizations and farmers’ associations, local authorities and individual farmers. Our interviews focused on service delivery systems, mechanisms of farmers’ financial contribution, the functioning of farmers’ associations, and the appropriateness of services provided. We performed thematic and comparative analyses at the interfaces between (1) service providers and partner–farmer associations, (2) service providers and delivered services, and (3) farmers/farmers’ associations and services.

Incentives for farmer financial participation are the increasing participation strategy, the fulfillment of farmers’ needs and the local leadership valorization. The selection and combination of their variants determine the motivating capacity and orientation of service organizations. Conversely to the increasing participation strategy, an effective fulfillment of farmers’ needs and local leadership valorization can lead to sustainable motivation. As the fulfillment of farmers’ needs determines importantly the effectiveness and sustainability of farmers’ motivation, the strategies of farmer financial participation are likely to fail if there are no successful agricultural technological incentives.

In the current context of privatization of agricultural services in developing countries, this analytical framework is of interest for policy makers and development workers for identifying conditions of farmer financial participation and designing effective motivation strategies.     

The Effectiveness of Radio as an Educational Medium

Abstract

Radio is a mass medium that can be harnessed to enhance an education campaign since it can span great distances and reach a large number oflisteners. Because of its wide coverage, relatively low unit cost, ability to reach those who are illiterate and without the use of mains power, it has proved to be an effective educational medium. The features of the radio medium are: it is a ‘blind’ (ie non‐visual) medium; it functions in real time; and its codes are purely auditory, consisting as they do of speech, music, sounds, noises and silences.

The fact that it is non‐visual can be harnessed to improve education quality since the listener is compelled to support the sound message by using his/her own imagination. No other medium has this educational power of stimulating and developing the abstract thinking of its audience and enriching and activating the listener's imagination.