Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Using of HPLC Analysis for Evaluation of Residual Monomer Content in Denture Base Material and Their Effect on Mechanical Properties
With the depletion of oil resources as well as the negative environmental impact of fossil fuels, there is much interest in alternative energy sources. Focusing on some of the most important alternate energy sources for the foreseeable future, the Handbook of Plant-Based Biofuels provides state-of-the-art information on the status of the production of biofuels, in particular, bioethanol and biodiesel.
After profiling plant-based biofuels, the book gives an overview of the production of biofuels from biomass materials by thermochemical and biochemical methods.
This Manual contains information which you should carefully observe to ensure your own personal safety and the prevention of material damage. The notices are highlighted by a warning triangle and, depending on the degree of hazard, represented as shown below.
The third book of four-volume edition of “Solar Cells” is devoted to solar cells based on
silicon wafers, i.e., the main material used in today's photovoltaics. Single-crystalline Si
(c-Si) modules are among the most efficient but at the same time the most expensive
since they require the highest purity silicon and involve a lot of stages of complicated
processes in their manufacture. Polycrystalline silicon (mc-Si) cells are less expensive to
produce solar cells but are less efficient.
One of the most fundamental question that an Engineer has to ask him/herself is what is how does
it deform, and when does it break. Ultimately, it its the answer to those two questions which would
provide us with not only a proper safety assesment of a structure, but also how to properly design it.
Ironically, botht he ACI and the AISC codes are based on limit state design, yet practically all design
analyses are linear and elastic.
The title of this standard should not be taken to imply that all of the materials
quoted are necessarily used solely or even principally in building.
This schedule was first published in 1935 as an attempt to provide a solution to
the problems which had arisen through structural and other calculations being
based on different data for the weights of materials concerned. The 1949 revision
was undertaken with a view to making the information more complete by the
inclusion of certain extra materials, together with such changes in the data as
had been found to be necessary....
In order to be suitable for tribological applications, polymeric materials, which can usually
exhibit mechanical strength, lightness, ease of processing, versatility and low cost, together
with acceptable thermal and environmental resistances, have to show good abrasion and
wear resistance. This target is not easy to achieve, since the viscoelasticity of polymeric
materials makes the analysis of the tribological features and the processes involved in such
phenomena quite complicated.
This textbook is intended for use in a one- or two-semester undergraduate course in
materials science that is primarily populated by chemical and materials engineering
students. This is not to say that biomedical, mechanical, electrical, or civil engineering
students will not be able to utilize this text, nor that the material or its presentation is
unsuitable for these students.
The purpose of this book is to provide the reader with a comprehensive overview of
materials being developed or considered for a hydrogen-based energy economy, the
state of their development, and issues associated with their successful deployment.
It is our hope that this book will be useful to both the newcomer to this field and the
experienced engineer and researcher desiring to know more about the broader topic.
It is expected that students, professors, engineers, scientists, and managers will find
this book useful....
Rapid development of optoelectronic devices and laser techniques poses an important
task of creating and
studying, from one side, the structures capable of effectively converting, modulating,
and recording optical data in a wide range of radiation energy densities and
frequencies, from another side, the new schemes and approaches capable to activate and
simulate the modern features. It is well known that nonlinear optical phenomena and
nonlinear optical materials have the promising place to resolve these complicated
In recent decades scientists and engineers around the globe have been responding to the requirement of high performance materials through innovative material research and engineering. The ever increasing demand on quality and reliability has resulted in some dazzling technological achievements in the area of advanced materials and manufacturing.
The new monograph ‘‘Mathematical Modeling in Mechanics of Granular Mate-
rials’’ written by Oxana & Vladimir Sadovskii is based on a previous Russian
version published in 2008. The Russian version was significantly revised and
extended. The References were updated with respect to the readers not being
familiar with the Russian language. Instead of eight chapters of the Russian ori-
ginal version there are now ten chapters—a new chapter devoted to continua with
independent rotational degrees of freedom is added....
Just as human operators must be protected from extreme environments, so must the electronics that operate and control a functional system. When the environment proves too warm, the electronics must be insulated, refrigerated, or simply moved to cooler locations. This last option is sometimes very difficult, or impossible, and the perceived fragility of electronics must then be reconsidered. Vacuum-tube technology provides a historical example of this process.
We live in an era with unparalleled opportunities to practice disease
prevention based on knowledge of the earth environment.
Although globally distributed early warning systems can monitor
physical hazards such as earthquakes and tsunamis, chemical hazards
on the other hand—whether actual or potential and natural or anthropogenically
induced—remain difficult to accurately identify in time and
space. Such hazards often have lengthy asymptomatic latency periods
before disability or disease becomes evident....
Similarly, while companies in New York and Ohio filed SARs through multiple
entities, a single firm in each state filed the majority of SARs. This was also the case
for Wisconsin, ranked fourth among filing locations. For that state, five separate
insurance carriers, through one entity, generated 88 percent of filings for the twelve-
month period. Unlike in Massachusetts, the Wisconsin-based firm was not affiliated
with other companies in and/or from the state during the same time frame.
This dissertation will outline solution processable materials and fabrication techniques to
manufacture flexible electronic devices from them. Conductive ink formulations and
inkjet printing of gold and silver on plastic substrates were examined. Line patterning and
mask printing methods were also investigated as a means of selective metal deposition on
various flexible substrate materials. These solution-based manufacturing methods
provided deposition of silver, gold and copper with a controlled spatial resolution and a
very high electrical conductivity.
The stability problem of thin triangular plates by the small elastoplastic deformation theory, was studied in . Basing on the theory of elastoplastic processes, this problem again has been investigated in  with incompressible material. In this paper we continue to study the mentioned problem with compressible material. The relation for determining critical forces is established. In particular the explicit expression of the critical force for the linear hardening material is found. Some numerical calculations have been given and discussed.
The paper discusses the corpora management system (CMS) design that uses Java and Oracle9i DBMS to support strategic corpora analysis. We present the pilot webbased CMS to support linguists in their daily work. The system offers facilities to assist linguists and internet users as they search for relevant material, and then classify and annotate this material.