نتایج جستجو برای: changing materials
تعداد نتایج: 577429 فیلتر نتایج به سال:
This paper reports on a study which examined students’ attitudes to learning grammar in autonomous contexts and their preferences for the learningmaterials with which to do so. In all, 38 students were surveyed and 13 of these then spent some time working in a language resource centre (LRC) with weband paperbased materials. Students then completed a series of questionnaires concerning what they...
Materials with zero/near zero thermal expansion coefficients are technologically important for applications in thermal management and engineering. To date, this class of materials can only be produced by chemical routes, either by changing chemical compositions or by composting materials with positive and negative thermal expansion. Here, we report for the first time a physical route to achieve...
Systems biology has been changing the way biological and biotechnological research is performed. Now, systems biological approaches can be taken to develop bioprocesses for the production of valuable drugs, commodity and fine chemicals, fuels, and polymers and other materials; this is termed systems biotechnology. Here I present the general strategies for systems biotechnology and several examp...
Systems biology has been changing the way biological and biotechnological research is performed. Now, systems biological approaches can be taken to develop bioprocesses for the production of valuable drugs, commodity and fine chemicals, fuels, and polymers and other materials; this is termed systems biotechnology. Here I present the general strategies for systems biotechnology and several examp...
To study the optical properties of materials, one needs a complete set of the angular distribution functions of surface scattering from the materials. Here we present a convenient method for collecting a large set of bidirectional reflectance distribution function (BRDF) samples in the hemispherical scattering space. Material samples are wrapped around a right-circular cylinder and irradiated b...
We investigate the transmission and reflection properties at the interfaces between the lossy positive-index materials (PIM) and negative-index materials (NIM) with graded permittivity and permeability. We present an exact analytical solution to Helmholtz’ equation for the oblique incidence on profile with the graded real parts of permittivity and permeability profile changing according to a hy...
The paper describes a combined approach to maintaining an E-Learning ontology in dynamic and changing educational environment. The developed NLP algorithm based on morpho-syntactic patterns is applied for terminology extraction from course tasks that allows to interlink extracted terms with the instances of the system’s ontology whenever some educational materials are changed. These links are u...
INTRODUCTION Observation-based occupational safety programs have long recognized the critical interaction of environment and behaviour in the workplace [1]. While the veracity of these programs is questioned [2], their foundation in behavioural psychology connects to various theory-based paradigms for changing manual materials handling (and musculoskeletal loading, or `consequences`) by manipul...
The bonding arrangement in amorphous materials plays a dominant role in determining their electrochemical, optical and transport properties. However, it remains a challenge to manipulate amorphous structures in a controlled manner. Recently, scientists at the Molecular Foundry at Lawrence Berkeley National Laboratory (LBNL) developed synthetic protocols for incorporating well-defined nanocrysta...
2. The percentage of children whose confirmatory testing results were communicated to their families by 4 months of age. In children with SCD, illness and death can be reduced through early diagnosis, treatment of complications, systematic follow-up, and patient/parent education. In particular, timely confirmatory testing and prompt communication with families are steps that pave the way for in...
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