scholarly journals EPS-SIF Energy Summer School 2019: Concluding remarks

2020 ◽  
Vol 246 ◽  
pp. 00022
Author(s):  
F. Wagner
Keyword(s):  
Summer School ◽  
Energy Transition ◽  
Point Of View ◽  
Future Trends ◽  
Present Stage ◽  
German Development ◽  
Global Issues ◽  
Energy Issue ◽  
Obvious Reason ◽  
System Point

This paper is based on the last talk of the summer school. The intention of the talk was not to repeat any highlights of the school, rather to place the energy issue in a wider frame of global issues like global warming and the global responses to this threat. Therefore, I tried to compile —where possible— new data which inform the audience on the present stage of the energy transition toward carbon-free technologies and some expected future trends. The largest hopes for a successful transformation are connected to renewable energy forms. This field is discussed here mostly from a system point of view whereas I resort heavily to examples from Germany. The most obvious reason is that I am familiar with the German development and have access to the most relevant data. On the other hand, the German experience is of importance for other highly industrialised economies and its development affects other countries because of its central location.

THE LAPBOOK AS A DIDACTIC TOOL TO IMPLEMENT INTEGRATED TRAINING IN NATURAL SCIENCE AND TECHNOLOGY AND ENTREPRENEURSHIP AT PRIMARY SCHOOL LEVEL

2018 ◽  
Vol 28 (3) ◽  
pp. 959-963 ◽  
Author(s):  
Yordanka Peycheva ◽  
Snezhana Lazarova
Keyword(s):  
Natural Science ◽  
Lessons Learned ◽  
Point Of View ◽  
School Level ◽  
Integrative Approach ◽  
Educational Goals ◽  
Knowledge And Skills ◽  
Global Issues ◽  
Highly Active ◽  
The World

The formation of comprehensive and in-depth notions of objects and phenomena in the world can be achieved when the mastery of knowledge and skills is carried out in a system realized in the context of integration of different scientific directions. One of the main issues in modern education is related to the contradiction - on one hand between the need to form the skills necessary for the orientation and adaptation of the personality in the dynamics of the globalizing world and on the other - the education which is largely based on unilateral acquiring of knowledge and skills within the different subject areas. This influences the development of a worldview and the formation of an adequate attitude towards the problems under consideration and the world as a whole. The knowledge and skills acquired today are often “locked” in the respective direction. The cross-curricular unity in the curriculum is of a recommended nature, but even if it is realized, it does not fully meet the need for a comprehensive and multifaceted consideration of global issues, as a result of which the student not only understands, reflects, but also applies the lessons learned in the process of creating a product - ideal or material. Combining the intellectual nature of the cognitive process with the practice activity are conditions in which the students are highly active and achieve better learning outcomes. Therefore, it is expedient for the different directions to correspond more closely to each other and to carry out effective cross-curricular integration. The concept of applying an integrative approach in the current paper is based on the idea of creating pedagogical conditions for reconciling the goals and expected outcomes of technology and entrepreneurship and natural sciences studied at the initial stage of the primary education. Integration can take place on two levels - knowledge and skills. We believe that the lapbook as an innovative didactic tool contains the necessary potential for effective realization of the educational goals in both directions in terms of achieving the expected results. In the course of its elaboration, new information is acquired in the field of engineering and technology, specific skills underlying the curricula of technology and entrepreneurship programs are developed. At the same time, a number of subjects from the learning content, which are considered from the natural science point of view, are enriched and perceived in a technological way, after which they find place in an attractive book - a lapbook, made by the students themselves. Its utilitarian value is multiplied by the personal contribution to its creation - not only as an object but also as content. The main topics that are of interest to the students are exploring and preserving nature, jobs, modern technical achievements, holidays and customs. As a result of the adequate integration of competences, tailored to curricula, a number of skills are formed, such as: skills for searching on their own, systematization and presentation of information, and application of the lessons learned in a new situation.

Architecture of Evolution

2021 ◽  
Author(s):  
Alla Packevich
Keyword(s):  
Planetary System ◽  
Conflict Situation ◽  
Point Of View ◽  
Science Students ◽  
Present Stage ◽  
Male And Female ◽  
Different Types ◽  
New Energy ◽  
The One ◽  
Insight Into

The monograph, on the one hand, examines the period of development of the descending cycle of evolution and the associated progressive changes that show the irreversibility of the processes of formation of the planetary system. The end of one cycle and the beginning of another leads to the transformation of the system of life and the expansion of consciousness at a new energy level. On the other hand, the questions of potential opportunities for the development of the ascending phase of evolution, which goes both along the path of complexity of the organization and along the path of diversity, are considered. In the ascending evolutionary stream, what has been differentiated into the corresponding levels in the descending cycle is brought together and thus prepared to enter into new, more perfect forms of unity. It is shown that the development of humanity along its entire path depends on the interaction of energies of various forms and potentials. Understanding the relationships between different types of energy and their use provides insight into many important issues in the evolution of society. The material introduces the modern features of the existence of the male and female sexes from the energy point of view. The idea of a way out of the current conflict situation that has arisen between the sexes at the present stage of evolution is proposed. It will be useful for those interested in the problems of scientific knowledge, architects, philosophers,historians, physicists and methodologists of science, students and students of secondary schools.

MORPHOLOGICAL AND OPTICAL STUDIES OF PZN-4.5PT NANOPARTICLES THIN FILMS ON NANOSTRUCTURED SILICON SUBSTRATE

2021 ◽  
Vol 3 (1) ◽  
pp. CA2105-1-CA2105-4
Author(s):  
C. Y. Fall Ndeye ◽  
◽  
M. Touré ◽  
R. Ndioukane ◽  
D. Kobor ◽  
...  
Keyword(s):  
Thin Films ◽  
Energy Transition ◽  
Global Scale ◽  
Point Of View ◽  
Thin Layers ◽  
Morphological Properties ◽  
Light Power ◽  
Energy Needs ◽  
Major Player ◽  
Uv Visible

The development of renewable energies is today essential to be able to respond in a sustainably way to the growing energy needs on a global scale, as well as to reduce the greenhouse gas emissions responsible for global warming. Among these energies, photovoltaic technology, which converts light power of the sun (renewable source) into electric power, is a major player in the energy transition. However, there is now a need to develop efficient, competitive and less polluting photovoltaic technologies, allowing more energy to be produced at a lower cost. The Pb (Zn<sub>1/3</sub> Nb<sub>2/3</sub>) O<sub>3</sub> (PZN) relaxor and its solid solutions with ferroelectric PbTiO<sub>3</sub> (PT) are of considerable interest both from the applications point of view and from the scientific point of view. In the past, numerous attempts have been made to prepare and study the properties of these materials in the form of thin layers for photovoltaic applications. However, due to the difficulties in preparing pure phase films with a high PZN content, there is very little knowledge of the properties of these materials. The objective of this work is to prepare PZN-4.5PT nanoparticle thin films, to study in detail their morphological and optical properties. The studies were carried out in three main directions: preparation of thin layers (PZN-PT) by deposit of spin coating, and characterize for optical and morphological properties (SEM). UV-visible measurements allowed us to have reflectance of less than 30% after deposit a thin layer PZN-4.5PT doped 1% Mn and undoped for a 70 at 80% absorption in UV-Visible-NIR.

Issues and Challenges (Privacy, Security, and Trust) in Blockchain-Based Applications

2021 ◽  
pp. 196-209
Author(s):  
Siddharth M. Nair ◽  
Varsha Ramesh ◽  
Amit Kumar Tyagi
Keyword(s):  
Internet Of Things ◽  
Point Of View ◽  
Security And Privacy ◽  
Future Trends ◽  
Security Issue ◽  
Blockchain Technology ◽  
Challenges And Opportunities ◽  
And Control ◽  
Near Future

The major issues and challenges in blockchain over internet of things are security, privacy, and usability. Confidentiality, authentication, and control are the challenges faced in security issue. Hence, this chapter will discuss the challenges and opportunities from the prospective of security and privacy of data in blockchain (with respect to security and privacy community point of view). Furthermore, the authors will provide some future trends that blockchain technology may adapt in the near future (in brief).

Analytical Investigation of the Effects of Induction Motor Transients on Compressor Drive Shafts

2011 ◽  
Author(s):  
Anand Srinivasan
Keyword(s):  
Mechanical System ◽  
Induction Motor ◽  
Analytical Investigation ◽  
Point Of View ◽  
Electrical Parameters ◽  
Short Circuits ◽  
Torque Values ◽  
Driving Torque ◽  
Electrical Supply ◽  
System Point

Centrifugal compressors driven by induction motors are most common in the turbomachinery industry. When sudden transients occur in the driver due to upsets in electrical supply to the motor, the air-gap torque generated by the motor undergoes a transient spike. This in turn gets transmitted through the coupling to the drive-shaft of the driven equipment, causing momentary high spikes in vibration that are torsional in nature, and can sometimes result in shaft torques that can create catastrophic damage to driven equipment components. In order to analytically predict these peak torques that can occur during transients, a complete drive-train torsional model needs to be created for the mechanical system, and the driving torque values need to be derived from the motor electrical system of equations. Various line faults are possible with induction motor driven equipment. A generalized analytical procedure based on motor electrical parameters to predict the peak shaft torques of compressor drive shafts is investigated in this paper. The effects of shaft transients due to 3-phase short circuits and reclosures are analyzed. The simulation has been performed for an industrial compressor train, and has been presented from a mechanical system point of view, rather than electrical. Comparisons and inferences are also made based on the simulation results.

scholarly journals Ecological aspect of mobile systems operated in terrain conditions

2012 ◽  
Vol 49 (No. 3) ◽  
pp. 119-123
Author(s):  
A. Janeček ◽  
M. Mikleš
Keyword(s):  
Production System ◽  
Energy Flow ◽  
Forest Ecosystems ◽  
Operating Performance ◽  
Point Of View ◽  
Mobile Systems ◽  
Ecological Aspect ◽  
Optimal Values ◽  
Theoretical Results ◽  
System Point

In this paper is evaluated an optimal constructional and operating performance of the mobil terrain system, that works in forest ecosystems from point of view of volume of processed biomass and total amount of logging transport erosion. A monitored terrain system, working in forestry, is considered as a production system, with its material and energy flow. The determination value, that optimizes the production system, is the operating and constructional performance. In this paper is evaluated the amount erosion in dependence of cutting mass, by means of mathematics and from system point of view. The conditions for the mobile terrain system work, that insure optimal, i.e. minimal value of erosion will be determined. The theoretical results are verified. The optimal values of soil erosion are determined by experimental measurements. The principles of the paper are based on theses of ecological synthesis that determine coupling between dissipative energy of a production system and its ecological cleanliness of work.

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