Search results for "Inspection"
showing 10 items of 149 documents
Magnetic-field-induced anisotropic curvature elasticity of a vesicle membrane containing magnetic polyions
2000
Interaction between a charged membrane and the electrolyte solution containing magnetic polyions is considered. A self-magnetic field, which arises due to the nonhomogeneous magnetic particle distribution near a charged membrane increases the effective charge screening length for the parts of a membrane normal to a magnetic field. The anisotropy of elastic properties of a membrane depending on the screening length is calculated on the basis of the curvature expansion. It is shown that due to diminishing of the spontaneous curvature for the parts of a membrane normal to a magnetic field there are two competing mechanisms of the ferrovesicle shape transformation under the influence of a magne…
Generation of narrowband antisymmetric lamb waves using a formed laser source in the ablative regime
2007
A formed laser source, using a four-element lenticular array, is used in the ablative regime to generate select, narrowband, acoustic plate waves. The arrangement of the array produces acoustical signals that have frequencies compatible with the response of the broadband capacitive air-coupled transducer used in this study. A simplified concept is presented to explain the effect of a line array source on the frequency content of acoustic waves. The analytical model for a point pulse surface displacement is derived from the point load solution to Lamb's problem. The point pulse displacement elements of a line array source are summed mathematically, taking into account all applicable propagat…
Risk based Fatigue Inspection Planning – State of the Art
2013
AbstractThe present paper presents the methodology and the practical calculations for risk based inspection planning of fatigue cracks in welded offshore steel structures. Due to the uncertainty in the variables involved in the problem the planning has to be carried out by stochastic modeling and risk based assessments. Scatter in potential crack growth has to be analyzed by applied probabilistic facture mechanics and the uncertainty in the performance of the actual inspection technique has to be determined. With given risk acceptance criteria the practical outcome of the analyses is recommended inspection techniques and associated planned inspection time intervals. The classical theory is …
Introducing a new method for efficient visualization of complex shape 3D ultrasonic phased-array C-scans
2017
Automated robotic inspection systems allow the collection of large data volumes, compared to existing inspection systems. To maximize the throughput associated with the non-destructive evaluation phase, it is crucial that the reconstructed inspection data sets are generated and examined rapidly without a loss of detail. Data analysis often becomes the bottleneck of automated inspections. Therefore, new data visualization tools, suitable to screen the NDT information obtained through robotic systems, are urgently required. This paper presents a new approach, for the generation of three-dimensional ultrasonic C-scans of large and complex parts, suitable for application to high data throughput…
Bericht des permanenten Sanitäts-Comité der Stadt Riga über seine Wirksamkeit im Jahre 1874
1875
Inhalt: Einleitung ; Tabelle über die Sterblichkeit Rigas in den Jahren 1867-1874 ; I. [Die Sorge für reine, gesunde Luft] ; II. Die Sorge für gutes Trinkwasser. Bericht über die im Auftrage des Sanitäts-Comité ausgeführte Untersuchung zweier Wasserprobben / F. Weber ; III. Die Sorge für güte, gesunde Nahrung ; IV. Der bürgerliche Verkehr.
Bericht des permanenten Sanitäts-Comité der Stadt Riga über seine Wirksamkeit im Jahre 1875
1876
Inhalt: Einleitung; I. Verunreinigung der Stadtluft : a) Unsauberkeit von Straßen und öffentlichen Plätzen, b) Gewerbliche Anlagen, c) Die Latrinen und die Art ihrer Vereinigung, d) Gräben mit stagnirendem Wasser, der Stadtgraben ; II. Eine Untersuchung von Trinkwasser ; III. Die Sorge für Beschaffung gesunder, unverdorbener Fleischnahrung ; Temporaire Verordnung über die Benutzung des Schlachthauses zu Mitau ; IV. Die anlage eines Badeplatzes ; V. Anfrage der Medicinal-Abtheilung der Luvl. Gouvernements-Regierung von 16. Aug., Nr. 1123 ; V. Die im Jahre 1870 begründete Bibliothek des Sanitäts-Comité.
Bericht des permanenten Sanitäts-Comité der Stadt Riga über seine Wirksamkeit im Jahre 1877
1878
Inhalt: Einleitung; I. Maßnahmen gegen Verunreinigungen der Stadtluft : a) Unsauberkeit und Wasseransammlungen auf unbebauten Plätzen, auf Straßen, Höfen etc., b) Verunreinigung der Luft durch gewerbliche Anlagen / Dr. Stavenhagen, Prof. Weber, c) Luftverunreinigungen durch die Latrinen und ihre Vereinigung, d) Verunreinigungen der Luft durch stagnirendes Wasser [etc.] / J. Stavenhagen, W. Knapski, H. Gögginger sen., R. Stegmann ; II. Die Sorge für gutes Trinkwasser ; III. Die Controle der Arbeiterwohnungen ; IV. Die Bibliothek.
Bericht des permanenten Sanitäts-Comité der Stadt Riga über seine Wirksamkeit im Jahre 1876
1877
Inhalt: Einleitung ; I. Allgemeine Maßnahmen ; II. Verunreinigungen der Straßen, Höfe, öffentlichen Plätze etc. ; III. Die fließenden und stagnirenden Gewässer ; IV. Die Latrinen und deren Vereinigung ; V. Die Fabriken und gewerblichen Etablissements ; VI. Die Nahrungsmittel und Getränke ; VII. Die Bibliothek / der Sanitäts-Comité ; BEILAGE : I. Gutachten, betr. die Verlegung der Thalbeim'schen Fabrik / Dr. Bochmann, F. Weber ; II. Bericht über: Die Schlachthäuser in Riga / Dr. Bochmann ; III. Bericht über: Untersuchung zweier Wasserproben / F. Weber
Issues in Software Inspection Practices
2005
The motivation for this research comes from a need to improve software inspection practices in software organizations. Even if inspections are well defined and regularly used in an organization, there may be some problems which can greatly reduce inspection effectiveness. The paper presents a list of inspection related problems which are known in the literature. It also relates some experiences from two case organizations. In addition, this paper provides an approach which helps identifying problems of this kind and directing limited improvement resources effectively.
Adding Autonomy to Robotic Enabled Sensing
2022
The capabilities of most non-destructive testing methods have been combined with some degree of automation in recent years, to enhance data acquisition speed, part coverage and inspection reliability. A plethora of automated or semi-automated inspection systems have been engineered to enable the robotic manipulation of specific types of sensors. Robotic inspection systems are usually operated through off-line programmed tool-paths. This approach works well when an accurate model of the part is available and the robotic inspection takes place in a well-structured environment, where the part position is precisely registered with respect to the robot reference system. However, it makes the ins…