scholarly journals Settlements around pumping wells: Analysis of influential factors and a simple calculation procedure

2017 ◽  
Vol 548 ◽  
pp. 225-236 ◽  
Author(s):  
Estanislao Pujades ◽  
Silvia De Simone ◽  
Jesus Carrera ◽  
Enric Vázquez-Suñé ◽  
Anna Jurado
Keyword(s):  
Simple Calculation ◽  
Influential Factors ◽  
Calculation Procedure ◽  
Pumping Wells

scholarly journals Settlements around pumping wells: analysis of influential factors and a simple calculation

2021 ◽  
Author(s):  
Estanislao Pujades
Keyword(s):  
Porous Medium ◽  
Mechanical Response ◽  
Simple Calculation ◽  
Influential Factors ◽  
Mechanical Parameters ◽  
Specific Storage ◽  
Storage Coefficient ◽  
Soil P ◽  
Boundary Constraints ◽  
Pumping Wells

Estimated and measured settlements caused by pumping rarely agree. Several reasons could explain this mismatch, including the influence of layering, the mechanical parameters used in the predictions, or the relationship between settlements and drawdown. We analyze the influence of the above issues by investigating the mechanical response of pumped elastic porous media under different conditions. A radially symmetric conceptual model is considered and several hydro-mechanical simulations are performed varying the boundary conditions, the size of the modeled domain and the presence or not of an overlying layer. The simplicity of the considered problem allows us to compare our results with existing analytical solutions, to identify the role of each variable on pumping settlements and to generalize the results. The most relevant results are as follows: (1) settlements are proportional to drawdown only outside a circle of radius equal to 0.7 times the thickness of the pumped porous medium; inside, they are virtually constant, which leads to two simple procedures for computing pumping settlements. (2) Poorly conductive layers located above (or below) a pumped porous medium (with higher hydraulic conductivity) reduce and smooth settlements. (3) Boundary constraints affect the local specific storage coefficient and the displacements occurred. (4) The specific storage coefficient evaluated by interpreting pumping tests with the Cooper and Jacob method (1946) leads to overestimation of the actual Young’s Modulus of the soil. The main conclusion is that settlements are less differential than expected near pumping wells. Still, they must always be evaluated acknowledging the nature of layering, the boundary constraints and carefully selecting the mechanical parameters of the soil.

A Wall-Skew-Angle Correlatior for Flow in Curved Ducts

1973 ◽  
Vol 2 (4) ◽  
pp. 194-200
Author(s):  
J.W.S. Young ◽  
J.H.G. Howard
Keyword(s):  
Boundary Layer ◽  
Simple Calculation ◽  
Calculation Procedure ◽  
Skew Angle ◽  
Curved Duct ◽  
Data Point ◽  
Curved Ducts ◽  
End Wall

A wall-skew-angle correlation is presented which, when combined with simple calculation procedure, allows the estimation of the boundary layer integral parameters on the end wall of a curved duct, requiring one measures, data point and the inlet and freestream conditions to be known. The major advantages of the formulation presented are simplicity and speed of solution.

How to Evaluate Remote Tower Metrics in Connection With Weather Observations

2018 ◽  
Vol 8 (2) ◽  
pp. 100-111 ◽  
Author(s):  
Maik Friedrich ◽  
Christoph Möhlenbrink
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Influential Factors ◽  
Air Traffic ◽  
Weather Event ◽  
Evaluation Of Performance ◽  
Weather Events ◽  
Weather Observations ◽  
Validation Experiment ◽  
Remote Controller

Abstract. Owing to the different approaches for remote tower operation, a standardized set of indicators is needed to evaluate the technical implementations at a task performance level. One of the most influential factors for air traffic control is weather. This article describes the influence of weather metrics on remote tower operations and how to validate them against each other. Weather metrics are essential to the evaluation of different remote controller working positions. Therefore, weather metrics were identified as part of a validation at the Erfurt-Weimar Airport. Air traffic control officers observed weather events at the tower control working position and the remote control working position. The eight participating air traffic control officers answered time-synchronized questionnaires at both workplaces. The questionnaires addressed operationally relevant weather events in the aerodrome. The validation experiment targeted the air traffic control officer’s ability to categorize and judge the same weather event at different workplaces. The results show the potential of standardized indicators for the evaluation of performance and the importance of weather metrics in relation to other evaluation metrics.

Determinant Factors of Student's Perception Toward Educational Loan Repayment

2018 ◽  
Vol 15 (1) ◽  
pp. 73-83
Author(s):  
Siti Zulaika Zolkeplee ◽  
Abu Bakar Hamed ◽  
Ahamad Faosiy Ogunbado
Keyword(s):  
Parental Influence ◽  
Student Loan ◽  
Influential Factors ◽  
Ministry Of Education ◽  
Loan Repayment ◽  
Education Fund ◽  
Relationship Of ◽  
The Relationship ◽  
Universiti Utara Malaysia ◽  
Survey Approach

The issue of unpayable educational loan that lead to student’s defaults has become a worrying trend all over the world. This research aims to examine the relationship of anxiety, parental influence, media awareness, and religiosity on student’s perception on educational loan repayment. A survey approach has been adopted to investigate student’s perception on educational loan repayment in Universiti Utara Malaysia. The data for this study were collected via structured questionnaires which were completed by 359 undergraduate Muslim’s students who acquire their financial loan from National Higher Education Fund Corporation (NHEFC). The data were then quantitatively analyzed using SPSS program. The findings of Pearson’s correlation showed a positive correlation between student’s perception towards educational loan repayment and religiosity, parental influence, media awareness, and anxiety. Further analysis using a multiple regression indicated that all independent variables explained 32.9 per cent of student’s perception on educational loan repayment. The result again indicated that religiosity and parent’s influence are most influential factors on student’s perception towards educational loan repayment. Whilst, media awareness slightly contributed to student’s perception towards educational loan repayment and anxiety gave no impact. The result implied that the Ministry of Education may design the syllabus in school and university curricular by adding the value of responsibility in loan repayment especially in religious and moral subjects. Besides, the Ministry Education of Malaysia are also urged to use media to disseminate the information regarding the importance for students to make loan repayment to parents as well as students. The collection of student loan then can be used for the next generation in financing their study which could result the prosperity of nation.

A Simple Calculation Method of Flashover Characteristics for Long Air Gaps under Various Discharge Conditions

1993 ◽  
Vol 113 (3) ◽  
pp. 252-258
Author(s):  
Kiyoto Nishijima ◽  
Itaru Tsuneyasu ◽  
Hiraku Nakahodo ◽  
Masaharu Minakami
Keyword(s):  
Calculation Method ◽  
Simple Calculation ◽  
Air Gaps

MEDIA AND MODERNITY: THE ROLE OF THE PRINTING PRESS IN THE MODERNIZATION OF WESTERN SOCIETY

1970 ◽  
Vol 5 (2) ◽  
pp. 291-301
Author(s):  
Yuyun Sunesti
Keyword(s):  
Modern Society ◽  
Public Spaces ◽  
Influential Factors ◽  
Western Society ◽  
15Th Century ◽  
Cultural Life ◽  
Information Media ◽  
Printing Method ◽  
Important Milestone

One of the influential factors in the formation of modern society in the Westernworld and subsequently spread to over the world has been the discovery of printing presswhich can be found in the form of printing method, printing company and print media.Since it was firstly used by Gutenberg in about 15th century AD, information which waspreviously delivered through oral medium with a limited audience, then through a methodof printing can be reproduced in large quantities and can be read by more audience, acrossdistance and time. Printing method which encourages the emergence of large printingcompanies and then print media has contributed in transforming modern cultural life ofsociety.In addition, the advent of the printing industries which has transformed intotransnational corporations as well as the emergence of journals and regular newspapersalso contributes significantly in raising public spaces as a medium for discussion andcritical thinking amidst society. Ultimately, this information media transformation brings achange in the state system which is more open and leads to the emergence of ideas ofnationalism which becomes an important milestone in transforming traditional societiesinto modern societies.

Influential Factors in The Law Enforcement Process of Sexual Violence Cases in Children in The City of Semarang

SOEPRA ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 4
Author(s):  
Liya Suwarni
Keyword(s):  
Law Enforcement ◽  
Sexual Violence ◽  
Medical Record ◽  
Child Protection ◽  
Influential Factors ◽  
Medical Record Data ◽  
Violence Against Children ◽  
Record Data ◽  
The Law ◽  
The City

Background. Cases of sexual violence increase every year, victims ranging from adolescents, children to toddlers. Based on data from the Indonesian Child Protection Commission, abuse and violence against children in Indonesia in 2013 were 23 cases, in 2014 there were 53 cases, in 2015 there were 133 cases, 2017 reached 1,337 cases, and as of July 2018 there were 424 cases. Purpose. Knowing the factors that influence the law enforcement process of sexy violence cases in Semarang City. Method This study uses descriptive analytical methods for cases of violence against children, based on medical record data in hospitals, documents in Mapolrestabes, the District Attorney's Office and the Semarang City Court for the period of January 2015 to December 2018. Results. Based on research results obtained 213 experimental cases section from medical record data in hospitals in the city of Semarang. Most cases of child abuse occurred in 2018 with 72 cases. Most victims are 12-14 years old age group, female. Most types of cases are cases of intercourse. The majority of violations are persons known as victims, perpetrators not working, and most of the places of occurrence are in the defendant's house. At the time of prosecution and trial, the number of cases was significantly reduced to only 8 cases. Factors related to this include lack of evidence, difficulty in obtaining information from victims, convoluted statements of coverage, lack of election, and obtaining diversion rates. Conclusion Cases of sexual violence have increased from year to year. The process of law enforcement on this problem still has many difficulties in each manufacturing process which is still difficult to overcome.

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