Primary and Secondary Sources of Electrical Energy

2017 ◽  
Author(s):  
Grigoriy A. Trestman
Keyword(s):  
Electrical Energy ◽  
Secondary Sources

Reduction of structural vibrations with the piezoelectric stacks ring

2020 ◽  
Vol 64 (1-4) ◽  
pp. 729-736
Author(s):  
Jincheng He ◽  
Xing Tan ◽  
Wang Tao ◽  
Xinhai Wu ◽  
Huan He ◽  
...  
Keyword(s):  
Vibration Control ◽  
Mechanical Energy ◽  
Electrical Energy ◽  
Structural Vibrations ◽  
Rotor Systems ◽  
Fea Model ◽  
Piezoelectric Stacks ◽  
Shunt Damping ◽  
Reduction Effect ◽  
Euler Bernoulli Beam

It is known that piezoelectric material shunted with external circuits can convert mechanical energy to electrical energy, which is so called piezoelectric shunt damping technology. In this paper, a piezoelectric stacks ring (PSR) is designed for vibration control of beams and rotor systems. A relative simple electromechanical model of an Euler Bernoulli beam supported by two piezoelectric stacks shunted with resonant RL circuits is established. The equation of motion of such simplified system has been derived using Hamilton’s principle. A more realistic FEA model is developed. The numerical analysis is carried out using COMSOL® and the simulation results show a significant reduction of vibration amplitude at the specific natural frequencies. Using finite element method, the influence of circuit parameters on lateral vibration control is discussed. A preliminary experiment of a prototype PSR verifies the PSR’s vibration reduction effect.

Utilization of electrical charges in the pores of tofu waste for hydrogen production in water

2020 ◽  
pp. 124-135
Author(s):  
I. N. G. Wardana ◽  
N. Willy Satrio
Keyword(s):  
Magnetic Field ◽  
Hydrogen Production ◽  
Sodium Bicarbonate ◽  
Positive Charge ◽  
Electrical Energy ◽  
Hydrogen Sensor ◽  
Water Molecules ◽  
Partial Charge ◽  
Delocalized Electron ◽  
Water Hydrogen

Tofu is main food in Indonesia and its waste generally pollutes the waters. This study aims to change the waste into energy by utilizing the electric charge in the pores of tofu waste to produce hydrogen in water. The tofu pore is negatively charged and the surface surrounding the pore has a positive charge. The positive and negative electric charges stretch water molecules that have a partial charge. With the addition of a 12V electrical energy during electrolysis, water breaks down into hydrogen. The test was conducted on pre-treated tofu waste suspension using oxalic acid. The hydrogen concentration was measured by a MQ-8 hydrogen sensor. The result shows that the addition of turmeric together with sodium bicarbonate to tofu waste in water, hydrogen production increased more than four times. This is due to the fact that magnetic field generated by delocalized electron in aromatic ring in turmeric energizes all electrons in the pores of tofu waste, in the sodium bicarbonate, and in water that boosts hydrogen production. At the same time the stronger partial charge in natrium bicarbonate shields the hydrogen proton from strong attraction of tofu pores. These two combined effect are very powerful for larger hydrogen production in water by tofu waste.

On Energy Status indicators and the role of renewableEnergy under Economic Crisis

2014 ◽  
pp. 92-105
Author(s):  
P. Bezrukikh ◽  
P. Bezrukikh (Jr.)
Keyword(s):  
Renewable Energy ◽  
World Economy ◽  
Electrical Energy ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Energy Status ◽  
Economy Growth ◽  
The World ◽  
Production Regime

The article analyzes the dynamics of consumption of primary energy and production of electrical energy in the world for 1973-2012 and the volume of renewable energy. It is shown that in the crisis year of 20 0 9 there was a significant reduction in primary energy consumption and production of electrical energy. At the same time, renewable energy has developed rapidly, well above the rate of the world economy growth. The development of renewable energy is one of the most effective ways out of the crisis, taking into account its production regime, energy, environmental, social and economic efficiency. The forecast for the development of renewable energy for the period up to 2020, compiled by the IEA, is analyzed. It is shown that its assessment rates are conservative; the authors justify higher rates of development of renewable energy.

Impak Kerjasama Politik Umno-Pas Terhadap Perkembangan Islam Di Malaysia Dari Tahun 1973 Hingga 1978

Sains Insani ◽  
2018 ◽  
Vol 2 (1) ◽  
pp. 12-16
Author(s):  
Mohammad Tawfik Yaakub ◽  
Osman Md Rasip
Keyword(s):  
Descriptive Analysis ◽  
Historical Research ◽  
Radio Station ◽  
The Political ◽  
Coalition Government ◽  
Secondary Sources ◽  
Political Cooperation ◽  
Islamic Religion ◽  
Political Approach ◽  
The Impact

This article discusses impact of UMNO-PAS political cooperation towards Islamic development in Malaysia from 1973 until 1978. The success of political cooperation in 1973 was the result of both UMNO’s leader, Tun Abdul Razak and PAS’s leader, Asri Muda willingness to explore a new political approach compared to what was being practiced at that time. Both leaders then started the development of a government known as the ‘Cooperation Government’ with the combination of UMNO and PAS in 1973 and later on, the development of the National Front’s (BN) Coalition Government in 1974. The Islamic religion benefits the most from the development of the Coalition Government which is a favourable gain for the Malays in Malaysia. Henceforth, this article will discuss in detail on the impact of the political cooperation between UMNO and PAS within the cooperation period. The methods used for this research is by interview and also by referring to secondary sources which are analyzed in a historical descriptive manner that is normally practiced in historical research. At the end of this research it is established that there are profound impacts to the Islamic religion within the UMNO-PAS cooperation period within 1973 to 1978 for example, the television and radio station beginning starting their programmes with the recitation from Quranic verses, the promulgation of ‘Adhan, alcohols are no longer served in official government’s function, lottery companies are not allowed to promote and announce the lottery results in official government’s media, the establishment of Islamic institution, the strengthening of Islamic education and the appropriate change in the relevant ministry’s symbols. This article can be utilized by subsequent researchers who wish to study the impact of political cooperation between UMNO and PAS. Keywords: political cooperation, UMNO-PAS, cooperation government ABTRAK:Makalah ini membincangkan mengenai impak kerjasama politik UMNO-PAS terhadap perkembangan Islam di Malaysia dari tahun 1973 hingga 1978. Kerjasama politik yang berjaya dibentuk bermula pada tahun 1973 adalah hasil daripada kesediaan Tun Abdul Razak dengan Mohd Asri Muda yang menerajui UMNO dan PAS pada ketika itu mencetuskan perubahan corak berpolitik yang berbeza berbanding sebelumnya. Maka, kedua-dua pemimpin ini kemudiannya merintis pembentukan sebuah kerajaan yang menggabungkan UMNO dengan PAS menerusi Kerajaan Campuran pada tahun 1973 dan Kerajaan Gabungan Barisan Nasional (BN) pada tahun 1974. Hasil daripada kejayaan penubuhan kedua-dua kerajaan ini, perkembangan Islam di negara ini bertambah pesat dan dapat dimanfaatkan oleh keseluruhan orang Melayu di Malaysia. Justeru, artikel ini membincangkan secara terperinci impak kerjasama politik antara UMNO dengan PAS dalam tempoh kerjasama politik berkenaan. Penyelidikan ini menggunapakai kaedah temubual dan menyorot sejumlah sumber sekunder yang kemudiannya dianalisis secara deskriptif sejarah (historical descriptive analysis) yang lazimnya dipraktikkan dalam kajian sejarah. Hasil kajian ini mendapati terdapat impak-impak jelas terhadap perkembangan Islam di negara ini sepanjang tempoh kerjasama politik antara UMNO dengan PAS dari tahun 1973 hingga 1978. Antara impak-impak tersebut ialah permulaan siaran televisyen dan radio dengan bacaan ayat-ayat suci Al-Quran, mengumandangkan suara azan, penghapusan arak dalam majlis-majlis kerajaan, penghapusan promosi dan keputusan judi di media kerajaan, penubuhan institusi Islam, pemerkasaan pendidikan Islam dan penukaran simbol institisu kerajaan. Akhirnya, artikel ini dapat dimanfaatkan oleh penyelidik-penyelidik berikutnya untuk menilai impak kerjasama politik antara UMNO dengan PAS.Kata kunci: kerjasama politik, UMNO-PAS, kerajaan campuran

Historical text archives and prosopography: the COEL database system

1998 ◽  
Vol 10 (1-3) ◽  
pp. 57-72 ◽  
Author(s):  
K. S. B. Keats-Rohan
Keyword(s):  
Research Tool ◽  
Direct Access ◽  
Specific Situation ◽  
Core Data ◽  
Secondary Sources ◽  
The Core ◽  
Level 3 ◽  
Full Discussion ◽  
Available Information ◽  
Level 2

The COEL database and database software, a combined reference and research tool created by historians for historians, is presented here through Screenshots illustrating the underlying theoretical model and the specific situation to which that has been applied. The key emphases are upon data integrity, and the historian's role in interpreting and manipulating what is often contentious data. From a corpus of sources (Level 1) certain core data are extracted for separate treatment at an interpretive level (Level 3), based upon a master list of the core data (Level 2). The core data are interdependent: each record in Level 2 is of interest in itself; and it either could or should be associated with an(other) record(s) as a specific entity. Sometimes the sources are ambiguous and the association is contentious, necessitating a probabilty-coding approach. The entities created by the association process can then be treated at a commentary level, introducing material external to the database, whether primary or secondary sources. A full discussion of the difficulties is provided within a synthesis of available information on the core data. Direct access to the source texts is only ever a mouse click away. Fully query able, COEL is formidable look-up and research tool for users of all levels, who remain free to exercise an alternative judgement on the associations of the core data. In principle, there is no limit on the type of text or core data that could be handled in such a system.

EXPERIMENTAL STUDIES OF CAR PROPERTIES ON A PHYSICAL MODEL

2019 ◽  
pp. 10-16
Author(s):  
Oleksii Timkov ◽  
Dmytro Yashchenko ◽  
Volodymyr Bosenko
Keyword(s):  
Mathematical Model ◽  
Remote Control ◽  
Physical Model ◽  
Model Experiment ◽  
Experimental Studies ◽  
Electrical Energy ◽  
Short Term ◽  
Motor Current ◽  
Memory Card ◽  
The Mathematical Model

The article deals with the development of a physical model of a car equipped with measuring, recording and remote control equipment for experimental study of car properties. A detailed description of the design of the physical model and of the electronic modules used is given, links to application libraries and the code of the first part of the program for remote control of the model are given. Atmega microcontroller on the Arduino Uno platform was used to manage the model and register the parameters. When moving the car on the memory card saved such parameters as speed, voltage on the motor, current on the motor, the angle of the steered wheel, acceleration along three coordinate axes are recorded. Use of more powerful microcontrollers will allow to expand the list of the registered parameters of movement of the car. It is possible to measure the forces acting on the elements of the car and other parameters. In the future, it is planned to develop a mathematical model of motion of the car and check its adequacy in conducting experimental studies on maneuverability on the physical model. In addition, it is possible to conduct studies of stability and consumption of electrical energy. The physical model allows to quickly change geometric dimensions and mass parameters. In the study of highway trains, this approach will allow to investigate the various layout schemes of highway trains in the short term. It is possible to make two-axle road trains and saddle towed trains, three-way hitched trains of different layout. The results obtained will allow us to improve not only the mathematical model, but also the experimental physical model, and move on to further study the properties of hybrid road trains with an active trailer link. This approach allows to reduce material and time costs when researching the properties of cars and road trains. Keywords: car, physical model, experiment, road trains, sensor, remote control, maneuverability, stability.

First Insights on Peruvian Luxury Consumers

2018 ◽  
Vol 9 (8) ◽  
pp. 699-712
Author(s):  
Anne-Flore Maman Larraufie ◽  
Keyword(s):  
Emerging Markets ◽  
Cultural Dimensions ◽  
Historical Background ◽  
Two Stage ◽  
Secondary Sources ◽  
Strong Potential ◽  
Analytic Process ◽  
Emerging Country ◽  
Research Questions ◽  
Practical Recommendations

Peru is an emerging country showing strong potential for future luxury developments. It already holds luxury regular consumers, mainly in the Lima capital. However, it is currently approached in a standardized process by luxury firms, following what is done in other emerging markets for luxury. To be efficient, it is necessary to get more knowledge about Peruvian consumers. This is what this article aims at. After reviewing the historical background of the country along with its cultural dimensions, we present results from a two-stage analytic process based on data collected from secondary sources and interviews with consumers. We derive from that practical recommendations for luxury managers and propose some research questions and hypotheses to be further explored and tested.

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