Electrical power free, low dead volume, pressure-driven pumping for microfluidic applications

This paper presents a simple-to-construct, low dead volume pump capable of generating a wide range of positive and negative pressures for microfluidic applications. The pump generates pressure or vacuum by changing the volume of air confined inside a syringe and is able to generate pressures between -95 and +300 kPa with a resolution as high as 1 Pa. Different from syringe pumps and electrokinetic pumping, which are capable of controlling flow rates only, our pump can be used to generate constant flow rates or constant pressures, which are required for certain applications such as the aspiration of biological cells for biophysical characterization. Compared to syringe pumps, the new pump has almost zero dead volume and does not exhibit pulsatile flows. Additionally, the system does not require electrical power and is cost effective (～$100). To demonstrate the capabilities of the pump, we used it to aspirate osteoblasts (MC3T3-E1 cells) and to determine Young's modulus of the cells, to generate a concentration gradient, and to produce variable-sized droplets in microchannels using hydrodynamic focusing.     

Visual motor integration as a screener for responders and non-responders in preschool and early school years: implications for inclusive assessment in Oman

Visual motor integration (VMI) is the ability of the eyes and hands to work together in smooth, efficient patterns. In Oman, there are few effective methods to assess VMI skills in children in inclusive settings. The current study investigated the performance of preschool and early school years responders and non-responders on a VMI test. The full range test of visual motor integration (FRTVMI) was administered to a sample of 359 children from preschool and elementary school settings in Oman. A two-way analysis of variance showed that there are statistically significant differences in VMI between preschool and early school non-responders. Gender did not show any effect on preschool children's performance on the FRTVMI, whereas it had an effect on elementary school children's performance. Results of the study are discussed in relation to the use of VMI assessment in screening for responders and non-responders in preschool and elementary school settings. Implications for psycho-educational assessment of children who struggle academically in inclusive settings are presented.     

Management of inclusive education in Oman: A framework for Action

Inclusive education (IE) and the special education services related to it are relatively new in Oman. Efforts to manage special/inclusive education face many challenges due to a number of culturally rooted factors. Further, empirical research on IE in Oman is scarce and there is a need to advance IE discourse based on empirically validated perspectives. This article examines how IE is managed in schools from the perspective of school leaders in order to develop a framework for action. The author conducted a preliminary qualitative inquiry into how IE is understood and managed in Key stage 1 schools in Oman. The inquiry was based on a focus group interview with a cohort of 25 school leaders who were completing a two year bachelor in educational administration, an endorsement‐like programme at Sultan Qaboos University. Findings showed a number of challenges and tensions between theory and practice, highlighted by school leaders. These challenges and tensions were analysed in order to map out strengths and difficulties. A three level prism shaped framework for action was developed based on the analysis. The framework for action could potentially serve to guide policy‐ and decision‐makers, researchers, practitioners, and is advocated to develop a model of best practice for the successful implementation and management of IE in Oman.     

Effectiveness of antigraffiti treatments in connection with penetration depth determined by different techniques

The elimination of spray paint using traditional (chemical and mechanical) methods inevitably entails altering surface characteristics. Hence, the impact and deterioration caused by graffiti in heritage buildings and monuments have led to the development and application of preventive systems in the form of antigraffiti coatings (which prevent paint from seeping into the pores of the surface material and facilitate cleaning). The effectiveness of two of these treatments, a commercial product (fluoroalkyl siloxane, protectosil, marketed by Degussa) and a hybrid organic-inorganic material (Ormosil), was evaluated in five construction materials (limestone, granite, cement mortar, lime mortar and brick), in terms of their penetration into the substrate. A number of techniques were used to determine the penetration depth (SEM/EDX, micro-Raman and LIBS), because a comparative analysis showed that none was universally valid for all types of treatments. The results show that the presence of the coating on the surface of less porous materials only ensures effective cleaning when the surface is fairly smooth. In granite, for instance, the CF₃ terminals in the fluorinated treatment hinder spray paint bonding more effectively than Ormosil, but not efficiently enough to ensure complete removal of the paint from granite surfaces.     

Developing a road performance index using a Bayesian belief network model

There is a high demand to develop and incorporate decision support tools, by the transportation sectors and other concerned agencies, to improve their infrastructure assets management under shrinking budgets and increasing demands. This paper develops a proof-of-concept Bayesian belief network (BBN) model to rank roads in a network system based on several key performance indicators (KPI) using a probabilistic framework. For a given road network, the proposed tool is capable of ranking or prioritizing the segment of roads for high level management objectives. To demonstrate the application of the proposed model, various scenarios are elaborated and discussed in detail. Finally, the sensitivity analysis is carried out to evaluate the effects of different KPIs.     

The Need For Networks Among Public,Academic, and School Libraries in Metropolitan Sierra Leone

Metropolitan Sierra Leone is made up of Freetown, the capital city and its environs. Within its bounds are dispersed a variety of libraries, each with the mission of providing adequate, relevant and up‐to‐date materials tailored to the needs of their numerous clientele. However, because of stringent budget cuts and a lack of human and material resources, these institutions are unable to carry out their missions. One way to improve this situation is through collaboration in the provision of materials and services. This article explores the need for the establishment for networks among public, academic and school libraries in metropolitan Sierra Leone. The article begins by defining metropolis followed by a brief recounting of some features of a metropolis, the library scene in metropolitan Sierra Leone and a consideration of plausible areas for networks among these libraries. The article concludes with a discussion of some issues that have to be faced if the proposed network is to materialise.     

Public Library Services in the Knowledge Economy: The Sierra Leone Experience

Sierra Leone's knowledge economy stresses the importance of information for national development, and libraries have a crucial role to play in this development. Libraries are catalysts for human progress because they help in the development and transmission of knowledge and culture; they foster civic awareness in support of economic productivity and innovation in society. Although many economic programs have been implemented by the Sierra Leone government, a vast amount of information is unused, either because national decision-makers do not realize its importance or because people who might want it do not know how to access it. The public library has to play an increasingly significant role if rapid economic recovery is to be made. This article examines Sierra Leone's economy in postwar reconstruction, the importance of information and knowledge in a knowledge economy, and the problems affecting library services and how the public library can overcome these problems and make meaningful contributions to the knowledge economy.     

Arabic literature: Uniterm indexing system for storage and retrieval

As centers of research and study in colleges and universities, Chinese academic libraries are heavily used and play a significant role in higher education. However, the level of administration can affect service to patrons and have an impact on their development. In this paper, the characteristics of administration in Chinese academic libraries are examined from both a historical perspective and current practice. The problems arising from the centralization of authority and administrative structure are also examined. Some possible suggestions are made of ways to improve library services in areas such as the quality of leadership, the creation of new positions, the increased responsibility of assistant directors, the re-organization of work distribution, the establishment of reference services, the development of faculty and staff participation in committee work, the importance of a library liaison program and the importance of designing a strategic plan for the library.