Influence of Absorber’s Stiffness and Installation Site on Bit Trajectory

2011 ◽  
Vol 50-51 ◽  
pp. 838-842
Author(s):  
Xiao Hua Zhu ◽  
Y.J. Jia ◽  
Jin He Li
Keyword(s):  
Numerical Calculation ◽  
System Dynamics ◽  
Equation System ◽  
Borehole Wall ◽  
Fourth Quadrant ◽  
The Third ◽  
Drilling Parameters ◽  
Optimum Position ◽  
Good For

A model of drillstring system dynamics was derived based on the drillstring’s Dynamics Equation, System Dynamics Theory and the optimization of absorber’s stiffness and installation site. A numerical calculation approach for solving drillstring system and bit movement was presented according to the drilling parameters. And this paper employed the simulation calculations to analyze and optimize absorber’s stiffness and installation site on different conditions. The results show that the absorber’s stiffness has significant impact on the movement frequencies of bit in the fourth quadrant when the bit next to the borehole wall drills ahead, and absorber has preferable ability of controlling deflection under stiffness for 3950kN/m and 6200kN/m; while the installation site of absorber has acute influence on the bit movement in the first quadrant, the third quadrant and the fourth quadrant, and the optimum position of the absorber is 0.6m distant from the bit. Parameters of absorber’s stiffness and installation site recommended in this study could improve the effectiveness of penetration and are good for controlling deflection and well path.

scholarly journals COMPARISON OF THREE CALCULATION METHODS OF ENERGY PERFORMANCE CERTIFICATES IN SLOVENIA

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Wadie Kidess
Keyword(s):  
Numerical Calculation ◽  
Energy Performance ◽  
Heat Losses ◽  
Calculation Methods ◽  
The Third ◽  
Simplified Method ◽  
Calculation Results ◽  
Thermal Bridges ◽  
Simplified Calculation ◽  
Family House

In order to get the authorization for issuing energy performance certificates in Slovenia, the expert candidate has to attend the prescribed course and pass the exam. The simplified method for heat losses calculation that is taught at this course neglects the thermal bridges, raising concerns whether the calculation results are reliable. In this paper we have compared three methods for calculation of thermal losses for a “typical” family house. The first is the above mentioned simplified calculation using a correctional factor; the second takes into account the thermal bridges, using linear thermal transmittances obtained by numerical calculation, and the third takes into account the thermal bridges, using default values for linear thermal transmittances. Noting that the second method returns the most exact values, we have found that the first method results are too large, yet still smaller than the third method results.

Application of the Complete Material Balance Method to Estimate the Composition of Weld Metal in Manual Arc Welding

2017 ◽  
Vol 265 ◽  
pp. 762-766 ◽  
Author(s):  
E.B. Votinova ◽  
M.P. Shalimov
Keyword(s):  
Weld Metal ◽  
Arc Welding ◽  
Slag Phase ◽  
Material Balance ◽  
Equation System ◽  
The Third ◽  
Manual Arc Welding ◽  
Material Balance Method ◽  
The Mathematical Model ◽  
Coated Electrodes

The article addresses the mathematical model of manual arc welding with coated electrodes, based on complete material balance, the model is a three equation system. The first equation describes the interaction between average and partial transition coefficients; the second equation shows the transition of an element from the metal phase; the third one characterizes the reduction of an element from the slag phase. The results of modeling for base and rutile electrode are given. The convergence of experimental data and calculations is shown. The regressionequations to calculate the parameters required for forecasting the composition of overlaying metal and weld metal in manual arc welding are listed.

scholarly journals Evaluation water quality of Diyala River in Iraq using Bhargava method

2018 ◽  
Vol 162 ◽  
pp. 05001
Author(s):  
Nawar Al-Musawi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
River Water ◽  
Water Quality Index ◽  
Quality Index ◽  
The Third ◽  
Tigris River ◽  
Good For ◽  
Diyala River

Diyala River is a tributary of Tigris River, it is one of the important rivers in Iraq. It covers a total distance of 445 km (275 miles). 32600 km2 is the area that drains by Diyala River between Iraqi-Iranian borders. This research aims to evaluate the water quality index WQI of Diyala River, where three stations were chosen along the river. These stations are D12 at Jalawlaa City at the beginning of Diyala River, the second station is D15 at Baaquba City at the mid distance of the river, and the third station is D17 which is the last station before the confluence of Diyala River with Tigris River at Baghdad city. Bhargava method was used in order to evaluate the water quality index for both irrigation and drinking uses. The results indicated that Diyala river water quality at its beginning was excellent for irrigation and good for drinking, while at the mid distance of the river, it was good for irrigation but heavily polluted and unsafe for drinking. Water quality of the river at the third site was acceptable for irrigation but again severely polluted and unsafe for drinking.

Marx as the Historical Materialist: Re-reading The Eighteenth Brumaire

2013 ◽  
Vol 21 (2) ◽  
pp. 21-46 ◽  
Author(s):  
Massimiliano Tomba
Keyword(s):  
Middle Class ◽  
The Political ◽  
Second Empire ◽  
Modern Democracy ◽  
National Assembly ◽  
The Third ◽  
Historical Materialist ◽  
History Of ◽  
Good For ◽  
The Revolution

Abstract The purpose of this paper is to re-read Marx’s Eighteenth Brumaire by highlighting the political meaning of a materialist historiography. In the first part, I consider Marx’s historiographical and political intention to represent the history of the aftermath of the revolution of ’48 as a farce in order to liquidate ‘any faith in the superstitious past’. In the second part I analyse the theatrical register chosen by Marx in order to represent the Second Empire as a society without a body, a phantasmagoria in which the Constitution, the National Assembly and law – in short, everything that the middle class had put up as essential principles of modern democracy – disappear. In the third part I argue that Marx does not elaborate a theory of revolution that is good for every occasion. What interests him is a historiography capable of grasping, in the various temporalities of the revolution, the chance for a true liberation.

The Morality of School Choice

2004 ◽  
Vol 2 (1) ◽  
pp. 7-21 ◽  
Author(s):  
Adam Swift
Keyword(s):  
School Choice ◽  
Private Schools ◽  
The State ◽  
State School ◽  
The Third ◽  
Good For

Summarising the arguments of How Not to Be A Hypocrite: School Choice for the Morally Perplexed Parent (Routledge Falmer 2003), the article discusses three questions. The first is whether parents who disapprove of elite private schools to such an extent that they would vote to ban them are acting hypocritically or inconsistently with their principles if they send their children to such schools. My answer is that they need not be. The second is whether parents should have the option of sending their children to such schools; whether those schools should be allowed to exist. My answer is that they should not. The third is whether, given that such schools do exist, parents are justified in sending their children to them. My answer is that in certain circumstances they may be, but that most of those who opt for such schools are not justified in doing so. As long as the state school is ‘good enough’, parents should send their children to that school, even where it would not be as good for their children as would private alternatives.

Propagation of the higher-order Landau modes of electron plasma wave

1977 ◽  
Vol 17 (2) ◽  
pp. 251-257 ◽  
Author(s):  
S. Ikezawa ◽  
Y. Kawai ◽  
T. Hara ◽  
Y. Nakamura ◽  
T. Itoh ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Reasonable Agreement ◽  
Plasma Frequency ◽  
Electron Plasma ◽  
Higher Order ◽  
Third Order ◽  
Electron Plasma Wave ◽  
The Third ◽  
Dipole Excitation ◽  
Unmagnetized Plasma

Propagation of electrostatic electron waves whose frequency is smaller than the electron plasma frequency in a large unmagnetized plasma is investigated both experimentally and theoretically. When a receiver is close to a transmitter, free-streaming electrons are detected owing to their large capacity for excitation. When the distance between the receiver and the transmitter becomes large, the third-order Landau mode is observed due to its smaller damping than that of free-streaming electrons. Finally, a dip in amplitude of the wave, caused by interference by the higher-order Landau modes, is seen. The results are in reasonable agreement with numerical calculation assuming a dipole excitation for the wave.

scholarly journals Tingkat Penerimaan panelis Terhadap Yoghurt Dengan Perlakuan Lama Fermentasi, Jenis susu dan Lama penyimpanan yang Berbeda

2019 ◽  
Vol 4 (3) ◽  
pp. 65-74
Author(s):  
Tursina Tursina ◽  
Irfan Irfan ◽  
Sri Haryani
Keyword(s):  
Nutritional Value ◽  
Storage Time ◽  
Lactose Intolerance ◽  
Block Design ◽  
Storage Period ◽  
Cow Milk ◽  
Fermentation Time ◽  
The Third ◽  
Randomized Block Design ◽  
Good For

Abstrak: Susu didefinisikan sebagai salah satu bahan pangan bernutrisi tinggi yang baik berperan sebagai asupan penting untuk, pertumbuhan kesehatan dan kecerdasan. Walaupun susu memiliki nilai gizi yang sangat baik namun untuk sebagian orang konsumsi dapat menimbulkan masalah berupa terjadinya lactose intolerance yaitu ketidakmampuan tubuh untuk mencerna laktosa yang terdapat didalam susu. Hal ini dapat diatasi dengan mengubah laktosa menjadi glukosa dan galaktosa dengan cara fermentasi. Salah satu produk fermentasi berbasis susu adalah yoghurt. Penelitian ini bertujuan untuk mempelajari pengaruh  lama fermentasi dan jenis susu yang digunakan dalam pembuatan yoghurt terhadap sensori yoghurt selama masa penyimpanan. Penelitian ini dilakukan menggunakan Rancangan Acak Kelompok (RAK) yang terdiri dari 3 faktor, faktor pertama yaitu lama fermentasi (F) yang terdiri dari 2 taraf, yaitu: F1 = 10 jam, F2 = 16 jam. Faktor kedua yaitu jenis susu yang digunakan yang terdiri dari 2 taraf, yaitu: S1 = susu sapi dan S2 = susu kambing. Faktor ketiga yaitu lama penyimpanan yang terdiri dari 3 taraf, yaitu: P1 = 0 minggu, P2 = 2 minggu, P3 = 4 minggu. Analisis yang dilakukan adalah uji organoleptik secara hedonik meliputi atribut warna, aroma, rasa dan tekstur. Hasil uji organoleptik (hedonik) menunjukkan bahwa secara umum panelis lebih menyukai yoghurt perlakuan jenis susu sapi dengan fermentasi 10 jam dan lama penyimpanan 3 hari (minggu ke-0). Abstract: Milk is determined as one of the high nutritious kind of foods that are good for important consumption, health and intelligence growth. Because milk has a very good nutritional value for most people who can spend problems because of lactose intolerance which is the body's inability to digest lactose in milk.This problem can be overcome by converting lactose to glucose and galactose by fermentation. One of the milk-based fermented products is yogurt. This study aims to investiage the effect of fermentation time and the type of milk used in making yogurt on the sensory yogurt during the storage period. This study was conducted using a Randomized Block Design (RBD) consisting of 3 factors, the first factor was the duration of fermentation (F): F1 = 10 hours, F2 = 16 hours. the second factor was the type of milk used which consists of twolevels, namely: S1 = cow's milk and S2 = goat's milk. The third factor is the storage time which we: P1 = 0 weeks, P2 = 2 weeks, P3 = 4 weeks. the analysis carried out were a hedonic test covering attributes of color, aroma, taste and texture. The organoleptic (hedonic) test result showed that in general all panelists preferred yogurt which was made by cow milk with 10 hours fermentation and 3 days of storage time (week 0).Abstract: Milk is determined as one of the high nutritious kind of foods that are good for important consumption, health and intelligence growth. Because milk has a very good nutritional value for most people who can spend problems because of lactose intolerance which is the body's inability to digest lactose in milk.This problem can be overcome by converting lactose to glucose and galactose by fermentation. One of the milk-based fermented products is yogurt. This study aims to investiage the effect of fermentation time and the type of milk used in making yogurt on the sensory yogurt during the storage period. This study was conducted using a Randomized Block Design (RBD) consisting of 3 factors, the first factor was the duration of fermentation (F): F1 = 10 hours, F2 = 16 hours. The second factor was the type of milk used which consists of two levels, namely: S1 = cow's milk and S2 = goat's milk. The third factor is the storage time which we: P1 = 0 weeks, P2 = 2 weeks, P3 = 4 weeks. The analysis carried out were a hedonic test covering attributes of color, aroma, taste and texture. The organoleptic (hedonic) test results showed that in general all panelists preferred yogurt which was made by cow milk with 10 hours fermentation and 3 days of storage time (week 0).

scholarly journals The Identity of the Performances of the 1960s Directed by Valeriu Cupcea

Arta ◽  
2021 ◽  
Vol 30 (2) ◽  
pp. 59-63
Author(s):  
Elfrida Koroliova ◽  
Keyword(s):  
Collective Farm ◽  
Life And Death ◽  
The Third ◽  
Old Japanese ◽  
Good For ◽  
The 1960S

The fruitful activity of Valeriu Cupcea in the 1960s was manifested in the identity of his plays. In the comedy Take, Yanke, and Kadar by I. Popa, this is a union of people overcoming national and religious prejudices. In the socio-psychological drama from the life of a collective farm village The Wheel of Time by A. Lupan, this is the drama of the era, manifested in life situations, in dramatic collisions of the characters in the play. In the philosophical drama about the life and death of A. Levada’s Faust and Death, this is a clash of human destinies, in the struggle of worldviews. The play I Don’t Want You To Do Good For Me Anymore by G. Malarciuc is a satire against favoritism and nepotism. In the play Two Lives and the Third by F. Vidrascu, this is psychological certainty in revealing the spiritual dramas of the heroes. In the play The Crane Feathers by J. Kinoshita this is a poetical and philosophical reading of an old Japanese legend. In the play Eminescu by M. Stefanescu, this is a highly artistic embodiment of the images of Eminescu, Creanga, Alecsandri. In the play Blanduzia’s Fountain by V. Alecsandri, this is the disclosure of the tragic life of a poet who selflessly strives to bring love and goodness to people and dooms himself to death. And others.

scholarly journals Humanitarization of University and Social Engagement Mission

2021 ◽  
Vol 30 (11) ◽  
pp. 52-63
Author(s):  
O. V. Zinevich ◽  
T. A. Balmasova
Keyword(s):  
Higher Education ◽  
Social Engagement ◽  
The United States ◽  
University Education ◽  
Third Mission ◽  
Non Profit ◽  
The Third ◽  
Good For ◽  
Mode Of Being ◽  
The University

The paper focuses on substantiating the institutional significance of the humanitarian component of University education and demonstrating opportunities for its implementation through non-profit activities of the University community. Transition to the new technological order accentuates the relevance of new personal and communicative competencies formed on the basis of education in humanities. Humanitarization is a priority task, which is reflected in the University education practices in the United States and European countries. The idea of upbringing a humanitarianly educated and humanitarianly oriented personality is declared in the discourses of the world leading Universities’ missions, whose activities are aimed at achieving public good for the society and its sustainable development. Russian documents and discussions on higher education emphasize the importance of humanitarization, but in practice, the humanitarian component in Russian universities is clearly being underestimated. In our opinion, this is due to the fact that humanitarization means mainly the strengthening of the cognitive element of University programs – the expansion of humanitarian specialties and humanitarian courses, but socially oriented University practices are not taken into account. Meanwhile, humanitarization includes both the translation of humanitarian knowledge and values – the strategic goals of the development of society, the state, the region, and the activity-based approbation of the knowledge gained in extra-curricular practices.Humanitarization of higher education is considered in the article from the standpoint of social and philosophical analysis, within the ontological aspect as a mode of being of an institutionally organized human activity on knowledge production and translation, which has closely been expressed in creating University 3.0, as well as in the idea and discourse of the third mission of University. The third mission sufficiently strengthens its emphasis on the anthropological and social function – orientation of University activities towards the genesis of a creative personality and the increased good for society. The goal of achieving the good is explicitly present in those social practices that are aimed at participating in the life of society without direct commercial gain and is implemented outside the University. The article examines the main types of socio-humanitarian practices in universities in Western countries.

scholarly journals Systemic Modeling of the Peace–Development Nexus

2021 ◽  
Vol 13 (5) ◽  
pp. 2522
Author(s):  
Bernard Amadei
Keyword(s):  
System Dynamics ◽  
21St Century ◽  
Systems Approach ◽  
Dynamic Equilibrium ◽  
Entangled States ◽  
Basic System ◽  
Value Proposition ◽  
Sustainable Practices ◽  
The Third ◽  
The World

As we enter the third decade of the 21st century, the value proposition of promoting sustainability and peace in the world has become more imperative than ever. It is an appropriate time to pause and reflect on what a post-pandemic COVID-19 world will look like and what constitutes a new mindset toward a more sustainable, stable, peaceful, and equitable world where all humans live with dignity and at peace. As emphasized in this paper, the new mindset must acknowledge that sustainability and peace are two entangled states of dynamic equilibrium. It is hard to envision a sustainable world that is not peaceful and a peaceful world that has not endorsed sustainable practices. This paper looks more specifically at the value proposition of adopting a systems approach to capture the linkages between selected development sectors (e.g., SDGs) and peace sectors (e.g., positive, negative, and cultural). Basic system dynamics (SD) models are presented to illustrate the peace–development nexus dynamics. The models are general enough to be used for different contexts and scales.

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