Chemistry of metallasiloxanes. Current trends and new concepts

2007 ◽  
Vol 76 (9) ◽  
pp. 847-866 ◽  
Author(s):  
M M Levitsky ◽  
Boris G Zavin ◽  
A N Bilyachenko
Keyword(s):  
ChemInform ◽  
2008 ◽  
Vol 39 (6) ◽  
Author(s):  
M. M. Levitsky ◽  
B. G. Zavin ◽  
A. N. Bilyachenko
Keyword(s):  

1961 ◽  
Vol 83 (1) ◽  
pp. 108-118 ◽  
Author(s):  
A. D. Somes

Advances in the design and construction of steam turbines for the propulsion of ships growing out of current trends in the construction and operation of merchant ships, as distinct from naval vessels, are considered. The effects of increases in power and steam conditions, and changes in classification rules, are examined and assessed in relation to the turbines. New concepts and methods in design are discussed and experience with advanced designs is indicated. Some examples of actual details of construction developed to meet new conditions are presented.


2011 ◽  
Vol 110-116 ◽  
pp. 2219-2227
Author(s):  
Siti Zawiah Md Dawal ◽  
Tuan Ya Tmys ◽  
Yusuf Khairi ◽  
Nukman Yusoff ◽  
Ahmad Yazid Aznijar

In order to be economically viable and competitive, the current trends in designing very light jet aircraft have shown that it is essential to improve the aircraft performance and operational flexibility goal, nevertheless have an efficient cost. The application of unconventional configuration has attracted the designer to achieve that goal. This paper discusses the prospective design of unconventional arrangement which will be applied for very light jet aircraft. The existing of a very light jet configurations is reviewed. New concepts of unconventional configuration for this type of aircraft are discussed. The three-surface configuration is then proposed for the design project. The configuration offers stability and unobstructed cabin. With the appropriate design, the additional weight and interference drag due to the extra surface can be reduced. The new design of aircraft configuration and cabin are discussed. High Speed Natural Laminar Flow airfoil is applied to obtain High Lift/Drag Wing design. The weight and aircraft performances are then estimated. The predicted aircraft performance has satisfied the design requirements and objectives. The design process covered by this paper is only concentrate on initial design. The data from this paper can be continuing in future for the next step of design.


2020 ◽  
Vol 19 (7) ◽  
pp. 1300-1314
Author(s):  
N.Ya. Leont'ev ◽  
A.F. Plekhanova ◽  
A.A. Ivanov ◽  
N.D. Ivanova

Subject. The article addresses the conceptual framework for competitiveness at the company level and development of original proposals for its perfection. Objectives. The study aims to improve the concept of corporate competitiveness in accordance with current trends in economics and management and the specifics of nuclear engineering companies. Methods. We employed general scientific research methods, classification and graphic visualization techniques. Results. The paper systematizes scholarly works on corporate competitiveness, formulates disadvantages of existing developments and ways to eliminate them, taking into account industry characteristics and specifics of engineering. We developed our own provisions of the concept of competitiveness of engineering companies operating in the nuclear industry, considering the external conditions, sector-specific issues, and promising trends in the management, economics, and business. We also introduced new concepts, including the notion of the agent of competitiveness, offered their classification to develop and analyze competitiveness. Conclusions. The specifics of engineering activities, threats and challenges to the nuclear industry, trends in the society, business and environment lead to the need to develop the foundations of the concept of competitiveness. The satisfaction of mainly market needs and the emphasis on the priority of economic indicators as criteria for assessing competitiveness limit the scope and functionality of traditional concepts, requiring their improvement.


Author(s):  
Pinosh Kumar Hajoary

Over the last five years, Industry 4.0 (I4.0) has gained a lot of attention from industry leaders, policymakers, and government officials worldwide. In an era where new concepts and techniques are introduced continuously, there is a lack of systematic literature review (SLR) on identifying main dimensions, levels, methods to assess the maturity and readiness level toward I4.0. To address this gap, we have chosen our primary objective to provide a critical review of existing literature on dimensions, methods, levels, and current trends to evaluate the I4.0 maturity and readiness models. A Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) methodology was adopted to make sure that there is no replication and to maintain complete transparency in the review process. A total of 53 papers were deemed relevant for thematic analysis. From the literature, we have found and proposed 10 main dimensions — Strategy and Organization, Manufacturing and Operations, Supply Chain, Business Model, IT, People, Customers, Product, Services, and Culture, to assess the I4.0 maturity and readiness levels of an organization. Further, a conceptual framework was proposed for the same. This study contributes theoretically to the development of I4.0 maturity and readiness models. So far, this is the first review paper on dimensions of I4.0 maturity and readiness models and is expected to give future researchers and practitioners a holistic guideline to design and develop I4.0 maturity and readiness models.


2020 ◽  
Vol 14 (2) ◽  
pp. 191-196
Author(s):  
Leonardo Metsavaht ◽  
Gustavo Leporace

Although the importance of studying the anatomy of structures of the ankle and foot joints is fundamental, evidence points to a low correlation between static and dynamic measurements; this could represent a problem in the study of the functioning of the ankle and foot during daily activities. The aim of the present study is to review the classic knowledge on ankle and foot biomechanics and present new concepts of functional biomechanics (3-dimensional biokinetic analysis) in order to clarify their clinical applications in assisting diagnostic and/or treatment decisions. For this, we performed a literature review and divided the article into 6 sections: (1) functional biomechanics of the ankle and foot; (2) dynamic joint stability; (3) functional stability mechanisms of the foot; (4) functional stability mechanisms of the ankle; (5) gait and running biokinetics; (6) the role of proximal joints in ankle and foot movement. At the end of this article, the reader should be able to understand how the 3-dimensional biokinetic analysis of the ankle and foot can contribute along with imaging examinations to the clinical setting, thus allowing the construction of a more complete profile of the patient. Such information could enable the identification of weaknesses and the implementation of objective interventions for each patient. Level of Evidence V; Prognostic Studies; Expert Opinion.


Author(s):  
Vasile-Petru Hategan

The study investigates the current trends that manifest themselves in two areas that have common origins in antiquity, found in the Hellenistic concept of Sophia: present in philosophy, where it expresses the love of wisdom, but also in theology where it represents divine love. Looking at this approach, the Sophia has manifested various orientations, either toward the field of ecology and the environment through the emergence of new concepts, such as ecophilosophy and ecotheology, but also toward the practice applied to the person, through the philosophical counseling or spiritual or pastoral counseling. This paper analyzes the characteristics of the applied trends, ecophilosophy and ecotheology, through their comparative analysis, along with a bibliometric study on papers published on these topics in indexed databases in the last 45 years. The paper presents the openness to innovation, through the emergence of the two concepts analyzed which created methods and tools specific to philosophical or spiritual counseling, and adaptations of these practices to the needs of contemporary society. Therefore, the innovation is sustained by creating a new specialization in community counseling practice, called eco-counseling for community (EC4com), with the new ecological trend, which can be included in the philosophical and spiritual practices applied in communities through individual counseling, for groups or community.


Author(s):  
Arthur V. Jones

In comparison with the developers of other forms of instrumentation, scanning electron microscope manufacturers are among the most conservative of people. New concepts usually must wait many years before being exploited commercially. The field emission gun, developed by Albert Crewe and his coworkers in 1968 is only now becoming widely available in commercial instruments, while the innovative lens designs of Mulvey are still waiting to be commercially exploited. The associated electronics is still in general based on operating procedures which have changed little since the original microscopes of Oatley and his co-workers.The current interest in low-voltage scanning electron microscopy will, if sub-nanometer resolution is to be obtained in a useable instrument, lead to fundamental changes in the design of the electron optics. Perhaps this is an opportune time to consider other fundamental changes in scanning electron microscopy instrumentation.


1991 ◽  
Vol 22 (2) ◽  
pp. 51-59 ◽  
Author(s):  
Kathy L. Coufal ◽  
Allen L. Steckelberg ◽  
Stanley F. Vasa

Administrators of programs for children with communicative disorders in 11 midwestern states were surveyed to assess trends in the training and utilization of paraprofessionals. Topics included: (a) current trends in employment, (b) paraprofessional training, (c) use of ASHA and state guidelines, and (d) district policies for supervision. Selection criteria, use of job descriptions, training programs, and supervision practices and policies were examined. Results indicate that paraprofessionals are used but that standards for training and supervision are not consistently applied across all programs. Program administrators report minimal training for supervising professionals.


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