Hydrogenated amorphous silicon, a new form of a common element, is a
semiconductor that has come of age. Its scientific attractions include a
continuously adjustable band gap, a usable camer lifetime and diffusion
length, efficient optical transitions, and the capability of employing either nor
Furthermore, it can be fabricated very easily as a thin film by a technology
that not only inherently escapes the expenst: of crystal perfection but also
requires significantly smaller amounts of raw materials....
W h e n h u m a n tutors engage in dialogue, they freely exploit all aspects of the mutually known context, including the previous discourse. Utterances that do not draw on previous discourse seem awkward, unnatural, or even incoherent. Previous discourse must be taken into account in order to relate new information effectively to recently conveyed material,and to avoid repeating old material that would distract the student from what is new.
Is a branch of polymer science dealing with analysis and characterisation of polymers. üThe complication of macromolecular chains, the dispersion in molecular weight, tacticity, crystallinity, orientation, composition of polymers etc. and complex morphological systems ⇒ analysis of polymer ≠ the small organic materials ⇒ Focus on viscoelastic properties, dynamic mechanical testing.
Tobacco smoking mostly in the form of cigarette smoking has been accused of impairing
microcirculatory system and the relevant changes in vascular formations and functions
may have a negative influence on the immune and inflammatory reactions in periodontal
tissues. Smokers were reported to have significantly less number of vessels in inflamed
gingival tissue compared to non-smokers (Rezavandi et al. 2002). Long-term smoking has
an established negative effect on the vasculature of periodontal tissues.
Time management skill is very essential to students in their study or in other extracurricular
activities, and needs more serious concern. The object of the research was to evaluate time
management skill of the 3rd year students of FFL-HUT to see if it is good or not, because they have
been facing a large amount of time-consuming assignments. Data were gathered using two
methods: content analysis on requirements of ESP subjects, on relevant materials, and
questionnaire survey on selected 3rd year students of FFL-HUT....
The Draft Code of Practice for Demolition of Buildings was first issued in February 1998
to provide guidance on safe and good practices for demolition works and for compliance
with the requirements of the relevant provisions of the Building (Administration)
Regulations and Building (Demolition works) Regulations relating to demolition works.
This volume is an update of the book, Soil Sampling and Methods of Analysis, first published
in 1993. The aims of this second edition remain the same as those of the earlier edition—to
provide a compilation of soil analytical and sampling methods that are commonly used,
straightforward, and relatively easy to use. The materials and procedures for these methods
are presented with sufficient detail and information, along with key references, to characterize
the potential and limitation of each method....
Industrial Safety and Health for Goods and Materials Servicesfocuses on the safety requirements of the wholesale and retail trades, including warehousing. This detailed text describes the hazards associated with chemicals, compressed gases, and fire.
Clear and concise, this easy-to-use text offers an introductory course on the language of gene cloning, covering microbial, plant, and animal systems. The essential concepts in biology relevant to the understanding of gene cloning are presented in a well-organized and accessible manner. This updated version of the first edition is an invaluable book for nonscientists as well as scientists with little background knowledge in gene cloning, providing a wealth of information for anyone wishing to gain proficiency in reading and speaking the language of gene cloning....
The main topic of "Fuel injection in automotive engineering" book is fundamental process that determines the development of internal combustion engines and performances of automotive vehicles. The book collects original works focused on up-to-date issues relevant to improving injection phenomena per se and injection systems as the engine key components.
Photovoltaics covers an extremely wide range of different fields of science and
technology that are in a state of continuous development and improvement for
decades. Solar cells and models that have been developed to the level of industrial
production or prototype samples, as well as the devices of exploratory types are
divided into the so-called generations of photovoltaics. Chapters, which concern the
problems of the first, second and third generations of solar cells are included in the
relevant three books of this edition....
The community of researchers claiming the relevance of their work to the field of
mechatronics is growing faster and faster, despite the fact that the term itself has been
in the scientific community for more than 40 years. Numerous books have been published
specializing in any one of the well known areas that comprised it: mechanical
engineering, electronic control and systems, but attempts to bring them together as a
synergistic integrated areas are scarce. Yet some common application areas clearly appear
This chapter presents basic knowledge on the special kind of the machining process in which a workpiece material hardened to 45–70 HRC hardness or more is machined with mixed ceramic or CBN tools. An extended comparison with finish grinding, as well with other abrasive finishing processes, is carried out. Specific cutting characteristics, including cutting forces, chip formation mechanisms and tool wear modes with relevant interface temperatures are discussed in terms of process conditions. Currently developing finite element (FE) and analytical modelling is overviewed.
This book covers a number of topics in heat and mass transfer processes for a variety
of industrial applications. The research papers provide information and guidelines in
terms of theory, mathematical modeling and experimental findings in many research
areas relevant to the design of industrial processes and equipment. The equipment
includes air heaters, cooling towers, chemical system vaporization, high temperature
polymerization and hydrogen production by steam reforming.
These handling methods are implemented individually, or in combination, by commercially available material-handling equipment types. 38.5 MATERIAL-HANDLING EQUIPMENT CONSIDERATIONS AND EXAMPLES 3 . . Developing the Plan 851 Once the material-handling problem has been identified and the relevant data have been collected and analyzed, the next step in the design process is to develop a plan for solving the problem. This usually involves the design and/or selection of appropriate types, sizes, and capacities of materialhandling equipment.
The book is intended to be a collection of contributions providing a bird’s eye view of some
relevant multidisciplinary applications of data acquisition. While assuming that the reader is
familiar with the basics of sampling theory and analog-to-digital conversion, the attention is
focused on applied research and industrial applications of data acquisition. Even in the few
cases when theoretical issues are investigated, the goal is making the theory comprehensible
to a wide, application-oriented, audience....
Now an established handbook of principles and techniques, this text develops an understanding of the relevance of four fundamental properties of the analyte: shape, polarity, charge and size, to the three key types of analysis: separation, identification and quantification. The third edition of Analytical Biochemistry has now been fully updated in content and format, making it even more accessible to students learning how to select analytical techniques and recognise their scope and limitations.
Research Reports IWMI’s mission is to improve the management of land and water resources for food, livelihoods and environment. In serving this mission, IWMI concentrates on the integration of policies, technologies and management systems to achieve workable solutions to real problems—practical, relevant results in the field of irrigation and water and land resources.
Optical communication is very much useful in telecommunication systems, data processing and networking. It consists of a transmitter that encodes a message into an optical signal, a channel that carries the signal to its desired destination, and a receiver that reproduces the message from the received optical signal. It presents up to date results on communication systems, along with the explanations of their relevance, from leading researchers in this field.