Economic Dynamic Cycle of the Covid-19 Impact: Unemployment Perspective

2020 ◽  
Author(s):  
João Gabriel de Araujo Oliveira ◽  
Geraldo Goes
Keyword(s):  
Economic Dynamic ◽  
Dynamic Cycle

DEVELOPMENT OF THE COMBUSTION CHAMBER OF GAS ENGINE, CONVERTED ON THE BASIS OF DIESELS D-120 OR D-144 ENGINES TO WORK FOR ON LIQUEFIED PETROLEUM GAS

2019 ◽  
pp. 2-8
Author(s):  
Serhii Kovalov
Keyword(s):  
Combustion Chamber ◽  
Compression Ratio ◽  
Diesel Engines ◽  
Combustion Engine ◽  
Motor Fuel ◽  
Liquefied Petroleum Gas ◽  
Gas Engine ◽  
Chamber Volume ◽  
Motor Fuels ◽  
Dynamic Cycle

The expediency of using vehicles of liquefied petroleum gas as a motor fuel, as com-pared with traditional liquid motor fuels, in particular with diesel fuel, is shown. The advantages of converting diesel engines into gas ICEs with forced ignition with respect to conversion into gas diesel engines are substantiated. The analysis of methods for reducing the compression ratio in diesel engines when converting them into gas ICEs with forced ignition has been carried out. It is shown that for converting diesel engines into gas ICEs with forced ignition, it is advisable to use the Otto thermo-dynamic cycle with a decrease in the geometric degree of compression. The choice is grounded and an open combustion chamber in the form of an inverted axisymmetric “truncated cone” is developed. The proposed shape of the combustion chamber of a gas internal combustion engine for operation in the LPG reduces the geometric compression ratio of D-120 and D-144 diesel engines with an unseparated spherical combustion chamber, which reduces the geometric compression ratio from ε = 16,5 to ε = 9,4. The developed form of the combustion chamber allows the new diesel pistons or diesel pistons which are in operation to be in operation to be refined, instead of making special new gas pistons and to reduce the geometric compression ratio of diesel engines only by increasing the combustion chamber volume in the piston. This method of reducing the geometric degree of compression using conventional lathes is the most technologically advanced and cheap, as well as the least time consuming. Keywords: self-propelled chassis SSh-2540, wheeled tractors, diesel engines D-120 and D-144, gas engine with forced ignition, liquefied petroleum gas (LPG), compression ratio of the internal com-bustion engine, vehicles operating in the LPG.

The Hegemony’s Contest in the South China Sea

SAGE Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 215824402110312
Author(s):  
Victor Alexandre G. Teixeira
Keyword(s):  
South China Sea ◽  
South China ◽  
Empirical Studies ◽  
Sudden Change ◽  
The United States ◽  
The South China Sea ◽  
Power Transition ◽  
The South ◽  
Economic Dynamic ◽  
China Sea

Constantly analyzed in scientific, theoretical, and empirical studies, the “ Asian Mediterranean” region has received renewed attention as a consequence of the rise of China. China’s emergence combines its strong economic dynamic with increased confidence, positioning it as a potential regional hegemony. On that conceptual basis, this study aims to answer whether a power transition has already occurred in the South China Sea and how the process of a regional hegemonic transition took place. Through an examination of the instruments used by the United States and China to exercise power, articulated with the power transition theory, it establishes that a transition in the South China Sea dispute could have already occurred. However, the study disclaims that Beijing’s evolution and sudden change of behavior aim to overthrow the U.S. global leadership but rather intends to reclaim its position of regional hegemony.

Oxidative decomposition properties of cationic exchange resins producing SO42− in power plants

2015 ◽  
Vol 71 (10) ◽  
pp. 1478-1484
Author(s):  
Zhiping Zhu ◽  
Chenlin Dai ◽  
Sen Liu ◽  
Ye Tian
Keyword(s):  
Data Analysis ◽  
Organic Carbon ◽  
Power Plants ◽  
Strong Acid ◽  
Residual Chlorine ◽  
Sulphate Content ◽  
Cationic Exchange ◽  
Exchange Resins ◽  
Dynamic Cycle ◽  
Decomposition Properties

The sulphate content of a system increases when strong-acid cationic exchange resins leak into a system or when sulphonic acid groups on the resin organic chain detach. To solve this problem, a dynamic cycle method was used in dissolution experiments of several resins under H2O2 or residual chlorine conditions. Results show that after performing dynamic cycle experiments for 120 hours under oxidizing environments, the SO42− and total organic carbon (TOC) released by four kinds of resins increased with time, contrary to their release velocity. The quantity of released SO42− increased as the oxidizing ability of oxidants was enhanced. Results showed that the quantity and velocity of released SO42− under residual chlorine condition were larger than those under H2O2 condition. Data analysis of SO42− and TOC released from the four kinds of resins by the dynamic cycle experiment revealed that the strength of oxidation resistance of the four resins were as follows: 650C > 1500H > S200 > SP112H.

The Dynamic Cycle of the Human Heart During Insulin Hypoglycemia and after Injection of Glucose II

Cardiology ◽  
1958 ◽  
Vol 33 (5) ◽  
pp. 365-370 ◽  
Author(s):  
Paulo De Paula E Silva ◽  
W. Raab ◽  
Yvonne K. Starcheska
Keyword(s):  
Human Heart ◽  
Insulin Hypoglycemia ◽  
Dynamic Cycle

scholarly journals Conjectural History and Scottish Philosophers

2006 ◽  
Vol 19 (1) ◽  
pp. 63-90 ◽  
Author(s):  
Roger L. Emerson
Keyword(s):  
Developmental Process ◽  
Historical Materialism ◽  
Scottish Enlightenment ◽  
Economic Dynamic ◽  
The Bible ◽  
Intellectual Milieu ◽  
Conjectural History ◽  
Naturalistic Account ◽  
Political Economic ◽  
Travel Accounts

Abstract "Conjectural history" is used here to "denote any rational or naturalistic account of the origins and development of institutions, beliefs or practices not based on documents or copies of documents or other artifacts contemporary (or thought to be contemporary) with the subjects studied." Many recent historians have focused on the apparent emergence within Scotland of a large number of sophisticated conjectural histories around ¡750, and analysed them within the framework of a Marxist-oriented social science. This paper argues that such a perspective is "inappropriate and misguided." If one looks at these works as an outcome of what went before, rather than a forerunner of what came after, they begin to lose their modernistic flavour. Conjectural histories of the Scottish Enlightenment were based essentially on four sources: the Bible and its commentaries, the classics, modern works of philosophy and travel accounts. Each had an influence on the works produced. The parallels between the Biblical and the secular conjectural histories are, for example, instructive and it is clear that no Scottish historian could consistently hold a doctrine of economic deter- minism or historical materialism and still reconcile this position with his Calvinist beliefs. Works such as Lucretius' On the Nature of Things had influenced the con- jectural histories of the Renaissance and continued to be used by the Scots just as they were by the English deists, whose speculations about historical development were also helpful to Scottish writers. Travel accounts provided information concerning mankind at various stages of civilization, but no explanation of the developmental process. While the study of history was a popular pursuit during the Scottish Enlightenment this inte rest followed trends on the continent and elsewhere. Furthermore, an examination of the great works of this period suggests that they were firmly based on the writings of scholars of a generation before. Certainly the leading writers of the "golden age" from roughly 1730 to 1790 gave a more sophisticated, detailed and elaborate treatment cf these ideas, but the sources, problems and concepts which they elucidated were not new. In their analyses, they did not employ historical materialism or economic determinism, though they were undoubtedly more political-economic, dynamic and secular in their attitude. They desired change for Scotland out of a patriotic regard for the comparative backwardness of their country, but the causes and cures for that condition were not fundamentally economic in nature. If these writings are examinedas a unit, and seen in context, the conjectural historians of the Scottish Enlightenment appear to be an understandable outcome of their intellectual milieu. The author supports this conclusion by a close examination of the work of Hume and Smith. This further explicates his theme that a nascent economic determinism was not the impetus for this writing that recent historians have read into these works.

scholarly journals Proses Administrasi Kurikulum

2019 ◽  
Author(s):  
ANNISA
Keyword(s):  
Central Government ◽  
Educational Programs ◽  
Regional Government ◽  
Administrative Authority ◽  
Quality Requirements ◽  
Decentralized System ◽  
The Republic ◽  
The Government ◽  
Dynamic Cycle ◽  
Centralized System

Considering that the Government of the Republic of Indonesia consists of the central government and regional governments, the administrative system also "adjusts so that a centralized system and a decentralized system are subjected. The system of centralized centralization is a system that refers to the administrative authority that is in the central government. Whereas the decentralized system is a system referring to the administrative authority that is in the regional government The implementation of the two administrative systems is a dynamic cycle and administrative mechanism, one related to each other and supporting each other In relation to the administration of educational programs (administration of curriculum), in Indonesia both systems have been applied The application is intended to support the integration and harmony in the implementation of education or curriculum that is realized through the quality requirements and management authority.

scholarly journals DIVERSIFIKASI AKTIVITAS IBU RUMAH TANGGA NELAYAN DI PULAU KOLORAY

KRITIS ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 73-87
Author(s):  
Jufri Abubakar ◽  
Marthen L. Ndoen
Keyword(s):  
Primary Data ◽  
Small Island ◽  
Fishing Communities ◽  
Economic Activities ◽  
Economic Dynamic ◽  
Ethnographic Approach

This research was conducted to provide an overview of the economic dynamic of the community, especially housewives in island Koloray in an effort to fulfill livelihood. This study it might be able to provide information that can be used to solve the problems of livelihood of fishing communities in small island. This study uses ethnographic approach. The data collected is secondary and primary data. The interview, discussion, and observation occurs more when the researcher is involved in the activity or when the informant is making, or selling the cake, it is not uncommon for an interview to occur while eating lunch, dinner and breakfast. Based on the verification of work, there are economic activities of housewives are ula-ula, making snacks, kiosk, wickerwork and saving. This activity was carried out so that they could increase the livelihood of the household. These activities depend on each other. Snack depends on the results of ula-ula, keeping the stall also done if there is not ula-ula activity, as well as plait the mat.

Advance Injection Strategy Optimization: Maximize Benefit-Cost Ratio by Integration of Economic Spreadsheet in Excel to Assisted History Matching Using Python Scripting

2021 ◽  
Author(s):  
Farren Kaylyn Foo ◽  
Derric Shen Chien Ong
Keyword(s):  
Development Strategy ◽  
New Technologies ◽  
Cost Ratio ◽  
Analysis Tool ◽  
Time Step ◽  
Economic Dynamic ◽  
Injection Strategy ◽  
Benefit Cost Ratio ◽  
Python Scripting ◽  
Benefit Cost

Abstract Oil prices see large fluctuations peculiarly over the last eight years due to natural disasters, political instability, and Covid-19 pandemic shock. These prompt to anxiety towards expenditure in planning and forecasting of a field development plan (FDP). Economic optimization of a reservoir under water drive can be extremely tedious and time consuming especially for complex field. Traditionally, upon completion of forecast optimization on fluid production, reservoir engineer willhand over the reservoir models to petroleum economist for economical evaluation. If the chosen development strategy is not economically viable, the model strategies will have to be updated, and continue the repetition of financial evaluation all over again. Hence, this paper established an automated workflow that diminished the dilemma on iterations obligation between simulation runs and financial reviews in searching for most efficient waterflooding strategy. The automated workflow is accomplished by bridging three tools together seamlessly utilizing python scripting. These include the cash flow economic spreadsheet model, the dynamic simulator, and an assisted uncertainty analysis tool. The process first started with defining the economic parameters such as OPEX, CAPEX, oil price, taxes, discounted rates, and other financial parameters on an annual basis in spreadsheet. The uncertainty parameters: water injection rate, maximum water cut, and injection duration will be evaluated during forecast optimization to produce project efficiency indexes: Net Present Value (NPV) and Benefit-Cost Ratio (BCR). This integration was achieved by python script that automatically creates a coding path which exchanges simulation production and economic spreadsheet data at every simulation time step and each development strategy, that require no manual intervention. The integrated economic-dynamic model workflow has successfully applied on West Malaysian field and Olympus model, a development strategy that maximize oil recovery without neglecting cost of water disposal, storage for total water produced from the reservoir. This paper successfully identified the most efficient waterflooding strategy and production constraints for each well using BCR as objective function for optimization. The optimum development scenario does have a BCR which is more than 2 which show that investment on that particular development strategy is profitable. The results also demonstrated a crucial impression that the highest oil cumulative production may not results in high BCR due to cost involvement in resolving water production and field maintenance services. This paper outlined the methodology, python scripting codes, and how integration automation works that successfully optimized an injection strategy in a development project using economic model from third-party application. The results of this automated workflow demonstrate a successful utilization of new technologies and simple customize programming knowledge that promote cross-discipline integration for enhanced work-time efficiencies in problem solving that is suitable for all reservoir model type to determine its success rate and economic viability during FDP.

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