scholarly journals Análisis de algunas técnicas iterativas para sistemas de ecuaciones lineales y su estudio de la convergencia a través del número de condicionamiento

2020 ◽  
Vol 25 (4) ◽  
pp. 621-629
Author(s):  
Fernando Mesa ◽  
Diana Marcela Devia Narváez ◽  
German Correa Vélez
Keyword(s):  
Mathematical Model ◽  
Linear Equations ◽  
Jacobi Method ◽  
Direct Result ◽  
System Of Equations ◽  
System Of Linear Equations ◽  
Term Result ◽  
Short Term ◽  
Short Term Result ◽  
Starting Point

At present, numerical analysis provides us with powerful tools to determine the solution of various problems whose mathematical model can be represented by a system of linear equations, these tools correspond to a number of direct and iterative methods, among which are Carl's method. Gustav Jakob Jacobi and the Doolittle and Crout method, which we analyze and compare in this document. To do this we will initially explore the concepts of conditioning the problem to determine how stable is the system from which the model was obtained, until we reach the decomposition of LU arrays proposed in the Doolittle and Crout method. As a result of the analysis and comparison in this document, depending on what is sought when solving a system of equations, either very large or small enough for our computer, we can choose an approximation that will bring a short-term result with an error. Due to the starting point as proposed in the Jacobi method, or it is possible to reach a direct result by implementing fewer iterations as proposed in the Doolittle and Crout metho

scholarly journals Introducing a Conditional Ghost Correction Into the Vector Method

1984 ◽  
Vol 6 (2) ◽  
pp. 117-123 ◽  
Author(s):  
H. Schaeben
Keyword(s):  
Mathematical Model ◽  
Quadratic Programming ◽  
Optimization Problem ◽  
Linear Equations ◽  
Singular System ◽  
Orientation Distribution ◽  
Mathematical Approach ◽  
System Of Linear Equations ◽  
Vector Method ◽  
The Mathematical Model

The concept of conditional ghost correction is introduced into the vector method of quantitative texture analysis. The mathematical model actually chosen here reduces the texture problem to one of quadratic programming. Thus, a well defined optimization problem has to be solved, the singular system of linear equations governing the correspondence between pole and orientation distribution being reduced to a set of equality constraints of the restated texture problem. This new mathematical approach in terms of the vector method reveals the modeling character of the solution of the texture problem provided by the vector method completely.

scholarly journals Program Corporate Social Responsibility di Industri Hotel: Sebuah Keuntungan atau Kerugian untuk Hotel

2012 ◽  
Vol 3 (1) ◽  
pp. 502
Author(s):  
Maria Pia Adiati
Keyword(s):  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Social Activity ◽  
Public Image ◽  
Term Result ◽  
Short Term ◽  
Short Term Result ◽  
The Social ◽  
Corporate Social

A word of CSR which stands for Corporate Social Responsibility is now becoming popular and more often many companies insert the CSR activities into its company profile. CSR has another different names such as Social Activity or Sustainability Development. CSR program according to wikipedia ia an organization or company has a responsibility to its customer, employees, share holders, community and environment in every aspect involved in company operasional. In the management science, there is a level whereas it is called social responsibility or it is just social obligation. Many opinions argues that CSR program will reduce the profit of the respected company. But many opinions denies the previous argue by saying the CSR program is a long term program profit gain since the short term result is good public image. The good public image will lead the loyalti of customer to keep using the product or service from the hotel. The customer loyalti also affected by the customer’s opinion, if they involves in the social activities held by the hotel, they also participate in a social activity.

scholarly journals Intracardiac extension of the inferior vena cavaLeiomyosarcoma with Budd-Chiari syndrome presentation: A case report

2015 ◽  
Vol 143 (1-2) ◽  
pp. 71-73
Author(s):  
Predrag Matic ◽  
Goran Vucurevic ◽  
Srdjan Babic ◽  
Slobodan Tanaskovic ◽  
Branko Lozuk ◽  
...  
Keyword(s):  
Inferior Vena Cava ◽  
Inferior Vena ◽  
Malignant Tumors ◽  
Vena Cava ◽  
Complete Removal ◽  
Term Result ◽  
Short Term ◽  
Short Term Result ◽  
Chiari Syndrome ◽  
Intracardiac Extension

Introduction. Leiomyosarcomas of the inferior vena cava are rare malignant tumors. A limited number of these cases have been described so far. Only few of them have intracardiac propagation and surgery is rarely undertaken for their treatment. Case Outline. We present a 52-year-old female patient in whom leiomyosarcoma of the inferior vena cava with intracardiac propagation was diagnosed. The patient underwent successful surgical treatment with complete removal of the tumor and direct suture of the inferior vena cava. No additional modalities of therapy were undertaken. Conclusion. Surgery, without radiation therapy can be a successful option for the treatment of inferior vena cava leiomyosarcoma with a good short-term result.

Tantalum Cones in Revision Total Knee Arthroplasty. A Promising Short-Term Result With 29 Cones in 21 Patients

2013 ◽  
Vol 28 (6) ◽  
pp. 988-993 ◽  
Author(s):  
Manuel Villanueva-Martínez ◽  
Basilio De la Torre-Escudero ◽  
José M. Rojo-Manaute ◽  
Antonio Ríos-Luna ◽  
Francisco Chana-Rodriguez
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Revision Total Knee Arthroplasty ◽  
Term Result ◽  
Short Term ◽  
Short Term Result ◽  
Total Knee

Successful repair of critical tricuspid regurgitation secondary to ruptured papillary muscle in a newborn

2004 ◽  
Vol 14 (4) ◽  
pp. 450-452 ◽  
Author(s):  
Kyoung Ah Lim ◽  
June Huh ◽  
Tae-Gook Jun
Keyword(s):  
Papillary Muscle ◽  
Tricuspid Regurgitation ◽  
Rare Case ◽  
Term Result ◽  
Short Term ◽  
Low Cardiac Output ◽  
Short Term Result ◽  
Long Term Follow Up

We report a rare case of an isolated critical tricuspid regurgitation due to rupture of a papillary muscle. This patient presented with a cyanosis immediately after birth. Despite mechanical ventilation and medical management to decrease the pulmonary vascular resistance, the low cardiac output persisted, along with the cyanosis. Repair of the tricuspid valve was performed, using an artificial tendinous cord, on the 4th day of life. The short-term result of the surgery is satisfactory, but the patient requires long-term follow-up.

Laparoscopic Single-Anastomosis Duodenal–Jejunal Bypass with Sleeve Gastrectomy (SADJB-SG): Short-term Result and Comparison with Gastric Bypass

2013 ◽  
Vol 24 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Wei-Jei Lee ◽  
Kuo-Ting Lee ◽  
Kazunori Kasama ◽  
Yosuke Seiki ◽  
Kong-Han Ser ◽  
...  
Keyword(s):  
Gastric Bypass ◽  
Sleeve Gastrectomy ◽  
Term Result ◽  
Short Term ◽  
Short Term Result ◽  
Single Anastomosis ◽  
Jejunal Bypass
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