Introduction to Topics in Organizational Systems and Technology Minitrack

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Centrifugal Compressors 201

Short CourseThis course supplements the Centrifugal Compressor 101 course by covering in greater detail four key areas related to compressors: aerodynamics, rotordynamics, performance and mechanical testing, and surge control. It is intended for those who attended the 101 course and wish to learn more about these topics. The course is also structured for those practicing rotating machinery engineers who have a basic understanding of the topics covered in CC101 but wish to further their understanding in these key areas

Gas Turbine Air Filtration Systems For Offshore Applications

TutorialAir filtration plays a key role in achieving high availability and low maintenance cost for Gas Turbines, in particular in offshore applications. Offshore applications pose a particular challenge, since they have to provide protection both against liquid water ingestion (and the salt particles dissolved in this water), as well as against very small particles (dry salt and other dust). Two fundamentally different concepts have emerged: High velocity systems and low/medium velocity systems, distinguished by the face velocity of the air entering the filter elements. While high velocity systems rely on vanes to remove liquids from the airstream, modern low/medium velocity systems use special filtration materials (usually in the last, high efficiency stage) that prevent water from passing through the element. Older systems did not have this type of filters available. The tutorial will discuss the physical principles of these air filtration concepts. The paper discusses the issues of filtration efficiency, dust holding capacity, as well as the capability to prevent water from entering the gas turbine. The discussion involves also the change in filtration characteristics over time. For the operator, it is important to understand the impact of the filtration system on engine degradation from fouling or hot corrosion, the frequency of intervention (water washing, change of filters), in conjunction with the operating conditions at site

Lacunarity Analysis: A Promising Method for the Automated Assessment of Melanocytic Naevi and Melanoma

The early diagnosis of melanoma is critical to achieving reduced mortality and increased survival. Although clinical examination is currently the method of choice for melanocytic lesion assessment, there is a growing interest among clinicians regarding the potential diagnostic utility of computerised image analysis. Recognising that there exist significant shortcomings in currently available algorithms, we are motivated to investigate the utility of lacunarity, a simple statistical measure previously used in geology and other fields for the analysis of fractal and multi-scaled images, in the automated assessment of melanocytic naevi and melanoma. Digitised dermoscopic images of 111 benign melanocytic naevi, 99 dysplastic naevi and 102 melanomas were obtained over the period 2003 to 2008, and subject to lacunarity analysis. We found the lacunarity algorithm could accurately distinguish melanoma from benign melanocytic naevi or non-melanoma without introducing many of the limitations associated with other previously reported diagnostic algorithms. Lacunarity analysis suggests an ordering of irregularity in melanocytic lesions, and we suggest the clinical application of this ordering may have utility in the naked-eye dermoscopic diagnosis of early melanoma

odML-Tables as a Metadata Standard in Microneurography

Metadata is essential for handling medical data according to FAIR principles. Standards are well-established for many types of electrophysiological methods but are still lacking for microneurographic recordings of peripheral sensory nerve fibers in humans. Developing a new concept to enhance laboratory workflows is a complex process. We propose a standard for structuring and storing microneurography metadata based on odML and odML-tables. Further, we present an extension to the odML-tables GUI that enables user-friendly search functionality of the database. With our open-source repository, we encourage other microneurography labs to incorporate odML-based metadata into their experimental routines

Centrifugal Compressors 201

Short CourseThis course supplements the Centrifugal Compressor 101 course by covering in greater detail four key areas related to compressors: aerodynamics, rotordynamics, performance and mechanical testing, and surge control. It is intended for those who attended the 101 course and wish to learn more about these topics. The course is also structured for those practicing rotating machinery engineers who have a basic understanding of the topics covered in CC101 but wish to further their understanding in these key areas

Centrifugal Compressors 201

Short CourseThis course supplements the Centrifugal Compressor 101 course by covering in greater detail four key areas related to centrifugal compressors as described below. It is intended for those who attended the 101 and wish to learn more about these topics. The course is also structured for those practicing rotating machinery engineers that have a basic understanding of the topics covered in Centrifugal Compressors 101 but wish to further their understanding in these key areas