scholarly journals Experimental assessment of eigenfrequencies and stiffness of the elastically supported body

2021 ◽  
Vol 1199 (1) ◽  
pp. 012082
Author(s):  
J Soukup ◽  
A Sapietová ◽  
J Skočilas ◽  
B Skočilasová
Keyword(s):  
Analytical Solution ◽  
Dynamic Analysis ◽  
Rigid Bodies ◽  
Vehicle Body ◽  
Experimental Assessment ◽  
Spatial Movement ◽  
Basic Characteristics ◽  
Elastically Supported ◽  
Vehicle Bodies

Abstract The aim of the research is to derive an analytical solution describing the vibrations of railway wagons caused by asymmetrical loading of cargo for prediction of dangerous conditions. A presumption for the dynamic analysis and assessment of the driving quality of railway vehicles is an important experimental determination and verification of the basic characteristics of the suspension respectively. A method for determining these characteristics for two-axle vehicles has been developed and applied. This method requires knowledge of the position of the center of gravity and the main central moments of inertia. Vehicle bodies, chassis frames, and wheelsets are assumed to be rigid bodies under the investigation of these characteristics. The characteristics of the springs are linear or can be linearized. The vehicle body performs a general spatial movement. The result of the investigation is an analytical method to obtain the required characteristics needed for the dynamic analysis of the vehicle.

Guaranteed values – the basis of the analysis of the quality of individual products

2019 ◽  
pp. 20-33
Author(s):  
D. N. Kalacheva
Keyword(s):  
Frequency Distribution ◽  
Distribution Law ◽  
Basic Characteristics ◽  
Definition Of

Herein, the main features and rules of using guaranteed values when analyzing the quality of rocket - space equipment products are considered. The definition of the guaranteed value and the form of its presentation is given. It is indicated that guaranteed value is distributed and is characterized by the frequency distribution law. The main methods of representation and conversion of guaranteed values are statistical. Examples of determining the basic characteristics of guaranteed values are given.

Chemical reasonableness in Rietveld analysis; organics

2007 ◽  
Vol 22 (1) ◽  
pp. 74-82 ◽  
Author(s):  
James A. Kaduk
Keyword(s):  
Rietveld Refinement ◽  
Normal Values ◽  
Solution Process ◽  
Molecular Geometry ◽  
Rietveld Analysis ◽  
Rigid Bodies ◽  
Torsion Angles ◽  
Structure Solution ◽  
Calcium Tartrate

We know a lot about normal values of bond distances, bond angles, torsion angles, and other molecular parameters. This knowledge can be incorporated into the structure solution process and into Rietveld refinement through the use of restraints and rigid bodies. An important measure of the quality of the refined model is the chemical reasonableness of molecular geometry. Refinement of the structures of calcium tartrate tetrahydrate and guaifenesin is used to illustrate the importance of chemical reasonableness in determining the quality of a Rietveld refinement.

scholarly journals What is the knowledge of tubercular patients about risk factors contributing to development of their disease

2006 ◽  
Vol 134 (Suppl. 2) ◽  
pp. 122-127 ◽  
Author(s):  
Miroslav Ilic
Keyword(s):  
Diabetes Mellitus ◽  
Risk Factors ◽  
Main Risk Factor ◽  
Active Pulmonary Tuberculosis ◽  
Anonymous Questionnaire ◽  
Number Of Patients ◽  
Significant Difference ◽  
Level Of Knowledge ◽  
Basic Characteristics

INTRODUCTION. Present knowledge of population on basic characteristics of tuberculosis is a significant issue of prevention of tuberculosis. OBJECTIVE. The objective of our study was to determine the level of knowledge on risk factors of tuberculosis among tubercular patients. METHOD. A total of 115 new patients with the active pulmonary tuberculosis were interviewed by means of anonymous questionnaire, who has been treated at the Institute of Pulmonary Diseases, Sremska Kamenica during six-month period (October 2003-March 2004). RESULTS. The patients fulfilled the questionnaire; 37.6 % had no or finished only elementary school, and 58.6 % considered genetics the main risk factor of tuberculosis. Every second patient believed that he could not catch tuberculosis if he suffered from diabetes mellitus or any kind of tumor. 8.7 % of patients who suffered from diabetes mellitus had been informed by their physicians that could catch tuberculosis one day. Every third patient did not possess sewage system and nearly 20% lived in moist flats. Around 85% had no regular salaries or these were significantly under the average Serbian income per capita in this period (12820 dinars-CSD). Leading risk factors that can contribute to development of tuberculosis were as follows: irregular nutrition (91.4 %), smoking (74.2 %), alcohol consumption (65.5%) and associated diseases (diabetes mellitus, tumors). Only 15% of them believed that all these risk factors (smoking, alcohol, irregular diet) could participate together in development of tuberculosis, and not as individual factors. Analyzing the patients? knowledge on risk factors of tuberculosis, in relation to their educational level and alcohol and cigarettes consumption, there was no significant difference (p<0.05). Nevertheless, analyzing the quality of life in patients? houses, in relation to salary and bad habits (alcohol, cigarettes) as risk factors of tuberculosis, significant statistical difference was found (p>0.05). CONCLUSION. Intensive and permanent education of population is necessary primarily considering the knowledge on tuberculosis that would be the basis of reducing the number of patients and leading to possible eradication of this disease.

scholarly journals Pravni položaj poštenog i nepoštenog posjednika u odnosu na vlasnika stvari

2017 ◽  
Vol 38 (1) ◽  
pp. 527-543
Author(s):  
Jadranko Jug
Keyword(s):  
Supreme Court ◽  
Case Law ◽  
Basic Method ◽  
Unjust Enrichment ◽  
The Supreme Court ◽  
Legal Position ◽  
The Republic ◽  
Basic Characteristics ◽  
The Right

This paper deals with the problems related to the legal position of honest and dishonest possessors in relation to the owner of things, that is, it analyses the rights belonging to the possessors of things and the demands that possessors may require from the owners of things to whom the possessors must submit those things. Also, in contrast, the rights and requirements are analysed of the owners of things in relation to honest and dishonest possessors. In practice, a dilemma arises in defi ning the essential and benefi cial expenditure incurred by honest possessors, what the presumptions are for and until when the right of retention may be exercised for the sake of remuneration of that expenditure, when the statute of limitations expires on that claim, and the signifi cance of the provisions of the Civil Obligations Act in relation to unjust enrichment, management without mandate and the right of retention, and which provisions regulate these or similar issues. The answers to some of these dilemmas have been provided in case law, and therefore the basic method used in the paper was analysis and research of case law, especially decisions by the Supreme Court of the Republic of Croatia. The introduction to the paper provides the basic characteristics of the concept of possession and possession of things, and the type and quality of possession, to provide a basis for the subsequent analysis of the legal position of the possessor of a thing in relation to the owner of that thing.

scholarly journals Impact of long-COVID on health-related quality of life in Japanese COVID-19 patients

2021 ◽  
Author(s):  
Shinya Tsuzuki ◽  
Yusuke Miyazato ◽  
Mari Terada ◽  
Shinichiro Morioka ◽  
Norio Ohmagari ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Disease Burden ◽  
Self Report ◽  
Health Related Quality ◽  
Cross Sectional ◽  
Long Duration ◽  
Related Quality ◽  
Health Related ◽  
Basic Characteristics

AbstractBackgroundThe empirical basis for a quantitative assessment of the disease burden imposed by long-COVID is currently scant. We aimed to assess the disease burden caused by long-COVID in Japan.MethodsWe conducted a cross sectional self-report questionnaire survey. The questionnaire was mailed to 530 eligible patients, who were recovered from acute COVID-19 in April 2021. Answers were classified into two groups; participants who have no symptom and those who have any ongoing symptoms that lasted longer than four weeks at the time of the survey. We compared health-related quality of life scores estimated by the EQ-5D-3L questionnaire between these two groups after adjusting basic characteristics of the participants by propensity score matching.Results349 participants reported no symptoms and 108 reported any symptoms at the time of the survey. The participants who reported any symptoms showed a lower value on a Visual Analogue Scale (median 70 [IQR 60-80]) and on the EQ-5D-3L (median 0.81 [IQR 0.77-1.0]) than those reporting no symptoms (median 85 [IQR 75-90] and 1.0 [IQR 1.0-1.0], respectively). After adjusting for background characteristics, these trends did not change substantially (Visual Analog Scale: median 70 [IQR 60-80] vs 80 [IQR 77-90], EQ-5D-3L: median 0.81 [IQR 0.76-1.0] vs 1.0 [IQR 1.0-1.0]).ConclusionsDue to their long duration, long-COVID symptoms represent a substantial disease burden expressed in impact on health-related quality of life.Trial registrationNot applicable.

scholarly journals A Numerical Approach for Sound Quality of Vehicle Doors

2020 ◽  
Vol 25 (1) ◽  
pp. 9-16
Author(s):  
Erkut Yalçın ◽  
Halil Bilal ◽  
Ayhan Yağcı ◽  
Haluk Erol
Keyword(s):  
Sound Pressure ◽  
Sound Quality ◽  
Numerical Approach ◽  
Design Sensitivity ◽  
Point Of View ◽  
Vehicle Body ◽  
Fem Model ◽  
Body Development ◽  
Design Variables

A Vibro-Acoustic Finite Element Method (FEM) model capable of calculating the transient sound pressure generated by the door slam of a vehicle was developed in this study. A design sensitivity analysis (DSA) was performed for investigating the effects of major design variables on the related sound quality metrics. The methodology was developed using a sedan-car and its FEM model. This paper shows that a Computer Aided Engineering (CAE) model can be used as a rather powerful tool for giving design change decisions for the door components from sound quality point of view during vehicle body development according to psychoacoustic parameters.

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