scholarly journals THE VIBROACOUSTICAL RESEARCH OF ROLL BEARINGS DEFECTS

Transport ◽  
2003 ◽  
Vol 18 (1) ◽  
pp. 32-36
Author(s):  
Eimantas Juodzevičius
Keyword(s):  
Diagnostic Methods ◽  
Vibration Frequencies ◽  
Acoustical Parameters ◽  
Western Literature ◽  
Advantages And Disadvantages

This article presents the description, results and conclusions of the methodology of the vibroacoustical research of the transmission of one of the units of a tactical car- of the bevel bearings of the main gear reducer. To explore the vibroacoustical research of the roll bearings with reference to the latest western literature the main diagnostic methods are used. Their advantages and disadvantages, the limits of the vibration frequencies, where the assessment of acoustical parameters of vibration, are analyzed. The defects of the bearings are identified exploring the level of the noise intensiveness in the proximate points fiom the bearings, components (changing the diametric clearance), and the results are presented in the form of the spectra of the amplitude surrounding.

Trends in Diagnosis for Active Tuberculosis Using Nanomaterials

2019 ◽  
Vol 26 (11) ◽  
pp. 1946-1959 ◽  
Author(s):  
Le Minh Tu Phan ◽  
Lemma Teshome Tufa ◽  
Hwa-Jung Kim ◽  
Jaebeom Lee ◽  
Tae Jung Park
Keyword(s):  
Sensitivity And Specificity ◽  
High Efficiency ◽  
Point Of Care ◽  
High Sensitivity ◽  
Signs And Symptoms ◽  
Diagnostic Methods ◽  
Advantages And Disadvantages ◽  
Treatment And Prevention ◽  
Clinical Tools ◽  
Diagnostic Applications

Background:Tuberculosis (TB), one of the leading causes of death worldwide, is difficult to diagnose based only on signs and symptoms. Methods for TB detection are continuously being researched to design novel effective clinical tools for the diagnosis of TB.Objective:This article reviews the methods to diagnose TB at the latent and active stages and to recognize prospective TB diagnostic methods based on nanomaterials.Methods:The current methods for TB diagnosis were reviewed by evaluating their advantages and disadvantages. Furthermore, the trends in TB detection using nanomaterials were discussed regarding their performance capacity for clinical diagnostic applications.Results:Current methods such as microscopy, culture, and tuberculin skin test are still being employed to diagnose TB, however, a highly sensitive point of care tool without false results is still needed. The utilization of nanomaterials to detect the specific TB biomarkers with high sensitivity and specificity can provide a possible strategy to rapidly diagnose TB. Although it is challenging for nanodiagnostic platforms to be assessed in clinical trials, active TB diagnosis using nanomaterials is highly expected to achieve clinical significance for regular application. In addition, aspects and future directions in developing the high-efficiency tools to diagnose active TB using advanced nanomaterials are expounded.Conclusion:This review suggests that nanomaterials have high potential as rapid, costeffective tools to enhance the diagnostic sensitivity and specificity for the accurate diagnosis, treatment, and prevention of TB. Hence, portable nanobiosensors can be alternative effective tests to be exploited globally after clinical trial execution.

scholarly journals SCREENING IN CARDIOLOGY

2018 ◽  
Vol 7 (4) ◽  
pp. 92-100 ◽  
Author(s):  
I. V. Samorodskaya
Keyword(s):  
Risk Factors ◽  
The United States ◽  
Diagnostic Methods ◽  
Screening Programs ◽  
Advantages And Disadvantages ◽  
Target Populations ◽  
Screening Strategies ◽  
National Programs ◽  
Expensive Process ◽  
Current Guidelines

The organization of screening is a complex and expensive process. Many countries have implemented and continue to implement various health screening programs in the population groups. However, there is a process of refusing to screen certain diseases. In cardiology, some screening strategies are integrated in the national programs aimed at identifying risk factors and preventing chronic non-communicable diseases. None of the countries have established the screening of the entire population for all known cardiovascular diseases (CVD) using all known diagnostic methods. The decision to screen individuals for CVDs / risk factors within the opportunistic screening in the target populations in different countries varies, since it depends on many factors. The article discusses the advantages and disadvantages of screening for CVD, presents current guidelines from professional communities and national services of the United States of America, Great Britain, and Canada.

scholarly journals Problems of diagnostics and treatment of diffuse — toxic goiter (Graves’ disease)

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Saydiganikxodja I. Ismailov ◽  
Komila Kh. Khayitboyeva
Keyword(s):  
Surgical Treatment ◽  
Iodine Deficiency ◽  
Diagnostic Methods ◽  
Graves Disease ◽  
Minimal Risk ◽  
Familial Predisposition ◽  
Advantages And Disadvantages ◽  
Radioiodine Ablation ◽  
Treatment Indications ◽  
Toxic Goiter

The article is devoted to prevalence, contemporary diagnostic methods and treatment of Grave’s disease. Advantages and disadvantages of different treatment options are discussed. The cause of the disease can be environmental conditions, infectious diseases, severe operational intervention, drugs, trauma, especially brain traumas, iodine deficiency and radiation damage of thyroid in iodine deficiency conditions, familial predisposition. The ideal treatment of Graves’ disease should ensure a fairly rapid elimination of clinical symptoms of thyrotoxicosis, return to an euthyroid state, with minimal risk of complications. The relapse rate of the disease can reach up to 80 %, using conservative treatment. The radioiodine ablation is relatively simple, non-invasive, effective and cheap. There are special indications for surgical treatment. Indications for surgical treatment: 1) large goiter (the volume of the thyroid gland is more than 45 ml); 2) frequent recurrences of thyrotoxicosis and failure of the drug and RIT; 3)malignancy of goiter; 4) allergic and toxic (leukopenic) reactions to thyreostatics. Patients with Graves’ disease should referred to a specialized center with multidisciplinary team.

scholarly journals Update on Malaria Diagnostics and Test Utilization

2017 ◽  
Vol 55 (7) ◽  
pp. 2009-2017 ◽  
Author(s):  
Blaine A. Mathison ◽  
Bobbi S. Pritt
Keyword(s):  
Gold Standard ◽  
Acute Infection ◽  
Laboratory Diagnosis ◽  
Rapid Diagnosis ◽  
Diagnostic Methods ◽  
Nucleic Acid Amplification ◽  
Advantages And Disadvantages ◽  
Life Threatening ◽  
Antigen Tests ◽  
Malaria Test

ABSTRACT Malaria is a potentially life-threatening disease requiring rapid diagnosis and treatment. Although microscopic examination of thick and thin blood films remains the gold standard for laboratory diagnosis, rapid antigen tests and nucleic acid amplification methods may also play a useful role in detection of acute infection. This review discusses the advantages and disadvantages of the commonly used diagnostic methods and provides important practice points for optimal malaria test utilization.

INTRADUCTAL PAPILLOMA BREAST CANCER

2020 ◽  
Vol 6 (2) ◽  
pp. 2-12
Author(s):  
Arif Guseynov
Keyword(s):  
Breast Cancer ◽  
Treatment Regimen ◽  
General Practitioners ◽  
Intraductal Papilloma ◽  
Diagnostic Methods ◽  
Diagnosis And Treatment ◽  
Differential Diagnostics ◽  
Advantages And Disadvantages

The lecture provides information for practitioners: oncologists and surgeons. mammologists, General practitioners on the problems of modern diagnosis and treatment of intra-flow breast papilloma. Modern diagnostic methods, advantages and disadvantages of each method are described in detail. Questions of differential diagnostics are presented, optimal tactics and treatment regimen, methods of prevention are proposed.

scholarly journals A review on lab-on-chip as a potential diagnostic tool for early detection of Plasmodium knowlesi

2020 ◽  
Vol 4 (9) ◽  
Author(s):  
Solihah Maketar ◽  
Nurhidanatasha Abu Bakar
Keyword(s):  
Early Detection ◽  
Diagnostic Tool ◽  
Malaria Infection ◽  
High Speed ◽  
Plasmodium Knowlesi ◽  
Acute Infection ◽  
Diagnostic Methods ◽  
Lab On Chip ◽  
Advantages And Disadvantages ◽  
On Chip

Massive elimination efforts have been done to control the malaria disease caused by the emergence of the fifth human malaria parasite known as Plasmodium knowlesi. Early detection of the parasite is important in treating malaria infection. Microscopic examination of Giemsa-stained thick and thin blood films is the gold standard for laboratory malaria diagnosis, while rapid diagnostic tests (RDTs), polymerase chain reaction (PCR) and loop-mediated isothermal amplification (LAMP) are significant diagnostic techniques to detect acute infection. However, these methods have several limitations in which it could delay the treatment. The potential of lab-on-chip (LOC) as a point-of-care diagnostic tool for malaria fulfils the requirement of limitations where it is able to produce early detection of malaria infection. This review discusses advantages and disadvantages of malaria diagnostic methods as well as new approaches that could be used for high speed, sensitive and reliable malaria detection to prevent the disease from causing severe complications and even fatal if left untreated.

scholarly journals Modern Approach in Radiological Diagnosis of Prostate Cancer (Systematic Review of International Clinical Guidelines and Clinical Studies Over 2014–2020)

2021 ◽  
Vol 101 (6) ◽  
pp. 373-384
Author(s):  
A. V. Vasilyev ◽  
A. V. Mishchenko ◽  
A. S.  Petrova ◽  
A. K. Nosov ◽  
E. A. Busko ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Specific Antigen ◽  
Diagnostic Methods ◽  
Modern Approach ◽  
Keywords Prostate Cancer ◽  
Advantages And Disadvantages ◽  
Psma Pet ◽  
Practice Recommendation ◽  
Keywords Prostate ◽  
Clinically Significant

An increase in the level of prostate-specific antigen requires additional examination of the patient in order not to subject him to unnecessary treatment in case of clinically insignificant prostate cancer and, conversely, to carry out the necessary volume of measures in case of clinically significant prostate cancer. The paper presents the modern solutions for effective usage of diagnostic methods in visualization of clinically significant prostate cancer. To assess the advantages and disadvantages of various methods for diagnosing prostate cancer a search of publications for 2014–2020 period was conducted based on the Scopus, Web of Science, PubMed databases. The request included keywords: prostate cancer, multiparametric MRI, multiparametric ultrasound, PSMA PET/CT. We selected 27 articles. The review includes guidelines from the European Association of Urology, the American Urological Society, the American College of Radiology, and one practice recommendation.

Analysis of functional methods for determining the optimal position of the mandible

2020 ◽  
Vol 25 (1) ◽  
pp. 22-25
Author(s):  
L. V. Dubova ◽  
S. S. Prisyazhnykh ◽  
N. V. Romankova ◽  
D. V. Malahov
Keyword(s):  
Temporomandibular Disorders ◽  
Load Test ◽  
Diagnostic Methods ◽  
Graphic Method ◽  
Optimal Position ◽  
Advantages And Disadvantages ◽  
Functional Methods ◽  
The Subject ◽  
Physiological Method

Relevance. The subject of the research is to compare different functional methods for determining the optimal position of the mandible.Purpose. To find the advantages and disadvantages of using various functional diagnostic methods to determine the optimal position of the mandible.Materials and methods. We conducted a literature review of the functional methods for determining the optimal position of the mandible in the treatment of patients with temporomandibular disorders. Nowadays different methods are used, such as anatomical and physiological method, bilateral manipulation, front deprogrammer, graphic method, aksiography, kineziography, TENS et al.Results. The method of bimanual manipulation and frontal deprogrammer determine the central relation when TMJ pathology is not expressed and the load test is negative. The graphic method evaluates the function of the temporomandibular joint, determines the optimal position of the mandible. TENS moves the lower jaw to a position of physiological rest. Kinesiography and Axiography determine the temporomandibular disorders and we can use them to dynamically monitor patients at all stages of treatment, monitor the determination of the optimal position of the mandible.Conclusion. From the results of this study, we can conclude that there are a lot of methods of functional diagnostics of TMJ, which help to determine the optimal position of the mandible. Everybody can choose their own set of methods, that let reduce the number of non-examined patients with temporomandibular disorders.

Mechanical Sound Flux Amplifier for Diagnostics by the Auscultation Methods

2021 ◽  
pp. 15-19
Author(s):  
V.L. Murzinov ◽  
◽  
P.V. Murzinov ◽  
Yu.V. Murzinov ◽  
◽  
...  
Keyword(s):  
Occupational Safety ◽  
Sound Level ◽  
Diagnostic Methods ◽  
Outlet Cross Section ◽  
Noticeable Increase ◽  
Advantages And Disadvantages ◽  
Equipment Reliability ◽  
Operation Costs ◽  
Acoustic Methods ◽  
Parabolic Reflectors

The article notes that occupational safety in industry largely depends on the working equipment reliability. Among the various methods of maintaining equipment operability, there is a diagnostic method that helps to identify hidden defects before they appear. Thanks to equipment diagnostics, it is possible to increase safety, avoid accidents, catastrophes, and minimize repair and operation costs. There are two types of diagnostic methods: contact and non-contact. The most efficient non-contact methods are acoustic methods that are not associated with the destruction of the equipment under study. The possibility of applying the methods of auscultation used in medicine for diagnosing the state of industrial equipment is shown. Various methods and devices of auscultation are considered. The advantages and disadvantages of currently existing auscultation devices are noted. The design of an auscultation device with a mechanical sound flux seal is presented. Mechanical sealing of the sound flux is based on the parabolic reflectors use. The efficiency of using parabolic reflective surfaces is shown. A relationship is obtained that relates the magnitude of the amplification of the sound flux with the dimensions of the auscultation device. The results of calculations of the increase in the sound level in the auscultation device show that even with a sufficiently small ratio of the diameter of the inlet for the sound flux to the diameter of the outlet cross section of the sound flux and the diameter of the reduced parabolic reflector, a noticeable increase in the sound level is obtained when using a mechanical amplifier of the sound flux in the auscultation device.

MULTIPARAMETRIC DIAGNOSTICS OF GAS TURBINE ENGINES

2021 ◽  
Vol 156 (A2) ◽  
Author(s):  
J Sinay ◽  
A Tompos ◽  
M Puskar ◽  
V Petkova
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Technical Condition ◽  
Diagnostic Methods ◽  
Turbine Engines ◽  
Technical Diagnostics ◽  
Suitable Model ◽  
Gas Turbine Engines ◽  
Advantages And Disadvantages ◽  
The Matrix

This article addresses the issue of diagnostics and maintenance of Gas Turbine Engines which are located in high Speed Ferries, Cruisers, Frigates, Corvettes, etc. Assurance of reliable operation can be performed only by using correct diagnostic methods and procedures of monitoring the condition of the devices and by selecting the correct strategy of maintenance. The issue of monitoring the technical condition of Gas Turbine Engines is treated through multiparametric methods of technical diagnostics incorporated into predictive maintenance, which is a part of proactive maintenance. There are methods of vibrodiagnostics, thermography, tribology, borescopy and emissions measurement. Each of these methods has lots of advantages and disadvantages; therefore it is very important to ensure their correct combination for trouble-free operation of those important facilities. Their suitability at work is discussed in the matrix of diagnostic methods application and the PF chart. The output of the work is a proposal of a suitable model of maintenance control which uses multiparametric diagnostic methods for small and big Gas Turbine Engines and optimizes maintenance costs.

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