About Inspection of Marine Shafts and Workpieces

NDT World ◽  
2015 ◽  
Vol 18 (4) ◽  
pp. 49-53
Author(s):  
Хвагин ◽  
Vladimir Khvagin
Keyword(s):  
Base Metal ◽  
Defect Detection ◽  
Flaw Detector ◽  
Operational Procedure ◽  
Emergency Situations ◽  
Regulatory Documents ◽  
Standard Specimens ◽  
Different Types ◽  
Testing Techniques

Introduction to the article gives the overview of vessels’ nowadays condition and emphasizes the necessity of their inspection. The article presents the operational procedure for inspection of blanks for shafts and rudder stocks as well as estimates the capabilities of shipyards to fulfill the inspection. Ways and techniques for different types defect detection are given; the necessary equipment is described; methodology peculiarities for flaw detector adjustment are indicated; recommendations for transducer selection are presented. The standard specimens used for workpiece inspection are described in detail. For used propeller shafts the procedure of preparation a shaft for testing is given as well as the sequence of testing operations including those for shafts with pressed-on bushes. Schemes for base metal testing of shafts, key-seats, shafts with pressed-on bushes, fillet zones are also presented. The article also indicates the regulatory documents according to which the quality of workpieces of shafts and used shafts should be estimated. It is shown by the real examples that timely fulfilled testing prevents emergency situations. The offered testing techniques ensure detection of inadmissible defects.

Digital Radiographic Image Enhancement for Weld Defect Detection using Smoothing and Morphological Transformations

2012 ◽  
Vol 9 (1) ◽  
pp. 15
Author(s):  
Suhaila Abdul Halim ◽  
Arsmah Ibrahim ◽  
Yupiter Harangan Prasada Manurung
Keyword(s):  
Defect Detection ◽  
Test Method ◽  
Radiographic Image ◽  
Radiographic Image Enhancement ◽  
Radiographic Images ◽  
Weld Defect ◽  
Different Types ◽  
Morphological Transformations ◽  
Non Destructive

Accurate inspection of welded materials is important in relation to achieve acceptable standards. Radiography, a non-destructive test method, is commonly used to evaluate the internal condition of a material with respect to defect detection. The presence of noise in low resolution of radiographic images significantly complicates analysis; therefore attaining higher quality radiographic images makes defect detection more readily achievable. This paper presents a study pertaining to the quality enhancement of radiographic images with respect to different types of defects. A series of digital radiographic weld flaw images were smoothed using multiple smoothing techniques to remove inherent noise followed by top and bottom hat morphological transformations. Image quality was evaluated quantitatively with respect to SNR, PSNR and MAE. The results indicate that smoothing enhances the quality of radiographic images, thereby promoting defect detection with the respect to original radiographic images. 

Differentiated approach to the provision of anesthetic aid for operations in otorhinolaryngology

2020 ◽  
Vol 19 (5) ◽  
pp. 57-62
Author(s):  
T. A. Mashkova ◽  
◽  
L. S. Bakulina ◽  
A. V. Chistotinov ◽  
A. I. Nerovnyi ◽  
...  
Keyword(s):  
Postoperative Period ◽  
Pathological Process ◽  
Short Term ◽  
Intravenous Anesthesia ◽  
Emergency Situations ◽  
Duration Of Surgery ◽  
Different Types ◽  
Somatic State ◽  
Endotracheal Anesthesia

The expansion of the range of anesthetic aids for ENT operations is largely associated with the development of endoscopic surgery and pharmacology. Taking into account the characteristics of each type of anesthesia, as well as the patient’s somatic state and the nature of the pathological process, the operating team makes a decision about choosing the type of anesthesia. The article presents the experience of anesthesiological support of operations in the Department of Otorhinolaryngology No. 1 of Voronezh Regional Clinical Hospital No. 1, there are also parallels with the works of Russian and foreign colleagues. For the purpose of efficiency research of different types of anesthesia for otorhinolaryngological operations, as well as for investigating opportunities to minimize the risk of complications, 2569 anesthetic aids were analyzed. Drug sedation was performed in 2163 cases (84,2%), endotracheal anesthesia in 266 cases (10,35%), short – term intravenous anesthesia in 110 cases (4,28%), and Stand-by anesthesia in 30 cases (1,17%). The stress response to surgical intervention was controlled according to the value of blood cortisol level, which patients have in all groups, both intraoperatively and in the postoperative period, was within the reference range (138–690 mmol/l), which indicates the adequacy of the ongoing allowance. Authors make a conclusion that the adequacy of anesthesia should be ensured by matching the type of anesthetic aid to the nature of the pathological process, the type and duration of surgery, taking into account the patient’s condition and the likelihood of developing emergency situations intraoperatively and in the postoperative period. Using modern achievements in otorhinolaryngology and anesthesiology, competent interaction between the surgeon and the anesthesiologist during the operation allows to significantly reduce the operational and anesthetic risks and increase the quality of otorhinolaryngological care.

Enumeration of Cryptosporidium oocysts from surface water concentrates by laser-scanning cytometry

2000 ◽  
Vol 41 (7) ◽  
pp. 197-202 ◽  
Author(s):  
F. Zanelli ◽  
B. Compagnon ◽  
J. C. Joret ◽  
M. R. de Roubin
Keyword(s):  
Surface Water ◽  
Water Samples ◽  
Laser Scanning ◽  
Immunomagnetic Separation ◽  
Entire Surface ◽  
Cryptosporidium Oocysts ◽  
Different Types ◽  
Laser Scanning Cytometry ◽  
Direct Microscopic Observation

The utilization of the ChemScan® RDI was tested for different types of water concentrates. Concentrates were prepared by cartridge filtration or flocculation, and analysed either without purification, or after Immunomagnetic separation (IMS) or flotation on percoll-sucrose gradients. Theenumeration of the oocysts was subsequently performed using the ChemScan® RDI Cryptosporidium application. Enumeration by direct microscopic observation of the entire surface of the membrane was carried out as a control, and recoveries were calculated as a ratio between the ChemScan® RDI result and the result obtained with direct microscopic enumeration. The Chemscan enumeration technique proved reliable, with recoveries yielding close to 100% in most cases (average 125%, range from 86 to 467%) for all the concentration/purification techniques tested. The quality of the antibodies was shown to be critical, with antibodies from some suppliers yielding recoveries a low as 10% in some cases. This difficulty could, however, be overcome by the utilization of the antibody provided by Chemunex. These data conclusively prove that laser scanning cytometry, which greatly facilitates the microscopic enumeration of Cryptosporidium oocysts from water samples and decreases the time of observation by four to six times, can be successfully applied to water concentrates prepared from a variety of concentration/purification techniques.

Different Types of Auricular Keloids and Treatment by Intralesional Cryosurgery: Best Practice for Obtaining Long-Lasting Clinical Results

Dermatology ◽  
2021 ◽  
pp. 1-10
Author(s):  
Yaron Har-Shai ◽  
Lior Har-Shai ◽  
Viktor A. Zouboulis ◽  
Christos C. Zouboulis
Keyword(s):  
Quality Of Life ◽  
Body Image ◽  
Recurrence Rate ◽  
Best Practice ◽  
Clinical Results ◽  
Psychosocial Impact ◽  
Aesthetic Outcome ◽  
The Past ◽  
Different Types

<b><i>Background:</i></b> Auricular keloids belong to the most perplexing medical conditions, which have significant psychosocial impact on the patient’s body image and quality of life. <b><i>Summary:</i></b> The article is purposed to provide dermatologists and plastic surgeons with the best proven practice using intralesional cryosurgery for the treatment of the different auricular keloid types in order to obtain superior clinical results by minimizing the probability of recurrence. In the past 20 years, the authors have developed novel procedures in order to increase the effectiveness of intralesional cryosurgery on auricular keloids, including hydrodissection, warm gauze technique, and excision of dangling skin. Long-lasting clinical results with a low recurrence rate and a satisfactory aesthetic outcome are achieved with no deformation of the ear framework.

scholarly journals Threat or Corrective? Assessing the Impact of Populist Parties in Government on the Qualities of Democracy: A 19-Country Comparison

2021 ◽  
pp. 1-21
Author(s):  
Davide Vittori
Keyword(s):  
Negative Impact ◽  
Quality Of Democracy ◽  
Clear Cut ◽  
Liberal Democratic ◽  
Country Comparison ◽  
Democratic Regimes ◽  
Different Types ◽  
The Impact

Abstract Scholars have long debated whether populism harms or improves the quality of democracy. This article contributes to this debate by focusing on the impact of populist parties in government. In particular, it inquires: (1) whether populists in government are more likely than non-populists to negatively affect the quality of democracies; (2) whether the role of populists in government matters; and (3) which type of populism is expected to negatively affect the quality of liberal-democratic regimes. The results find strong evidence that the role of populists in government affects several qualities of democracy. While robust, the findings related to (2) are less clear-cut than those pertaining to (1). Finally, regardless of their role in government, different types of populism have different impacts on the qualities of democracy. The results show that exclusionary populist parties in government tend to have more of a negative impact than other forms of populism.

scholarly journals Downregulation of exosomal let-7d and miR-16 in idiopathic pulmonary fibrosis

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Donato Lacedonia ◽  
Giulia Scioscia ◽  
Piera Soccio ◽  
Massimo Conese ◽  
Lucia Catucci ◽  
...  
Keyword(s):  
Idiopathic Pulmonary Fibrosis ◽  
Pulmonary Fibrosis ◽  
Therapy Response ◽  
Down Regulation ◽  
Cross Sectional ◽  
Exosomal Mirnas ◽  
Different Types ◽  
Sectional Analysis ◽  
Made In

Abstract Background Idiopathic Pulmonary Fibrosis (IPF) is a degenerative interstitial lung disease with both a poor prognosis and quality of life once the diagnosis is made. In the last decade many features of the disease have been investigated to better understand the pathological steps that lead to the onset of the disease and, moreover, different types of biomarkers have been tested to find valid diagnostic, prognostic and therapy response predictive ones. In the complexity of IPF, microRNA (miRNAs) biomarker investigation seems to be promising. Methods We analysed the expression of five exosomal miRNAs supposed to have a role in the pathogenesis of the disease from serum of a group of IPF patients (n = 61) and we compared it with the expression of the same miRNAs in a group of healthy controls (n = 15). Results In the current study what emerged is let-7d down-regulation and, unexpectedly, miR-16 significant down-regulation. Moreover, through a cross-sectional analysis, a clustering of the expression of miR-16, miR-21 and miR-26a was found. Conclusions These findings could help the individuation of previously unknown key players in the pathophysiology of IPF and, most interestingly, more specific targets for the development of effective medications.

scholarly journals Investigation of Color Reproduction on Linen Fabrics when Printing with Mimaki TX400-1800D Inkjet with Pigment TP250 Dyes

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 354
Author(s):  
Tim Tofan ◽  
Rimantas Stonkus ◽  
Raimondas Jasevičius
Keyword(s):  
Mechanical Properties ◽  
Color Reproduction ◽  
Related Effect ◽  
Color Characteristics ◽  
Fabric Density ◽  
Different Types ◽  
The Difference ◽  
Printing Parameters ◽  
Linen Fabric

The aim of this research is to investigate related effect of dyeability to linen textiles related to different printing parameters. The study investigated the change in color characteristics when printing on linen fabrics with an inkjet MIMAKI Tx400-1800D printer with pigmented TP 250 inks. The dependence of color reproduction on linen fabrics on the number of print head passes, number of ink layers to be coated, linen fabric density, and different types of linen fabric was investigated. All this affects the quality of print and its mechanical properties. The change in color characteristics on different types of linen fabrics was determined experimentally. We determine at which print settings the most accurate color reproduction can be achieved on different linen fabrics. The difference between the highest and the lowest possible number of head passages was investigated. The possibilities of reproducing different linen fabric colors were determined.

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