Soon-Sup Lee

Assessment of Achilles enthesitis in the spondyloarthropathies by colour Doppler energy ultrasound in the context of the ‘enthesis organ’

Objectives: To identify the characteristic features of Achilles enthesitis of the spondyloarthropathies (SpA) detectable by colour Doppler energy ultrasound (CDEU) in the context of the ‘enthesis organ’. Methods: Seventy patients with SpA and 15 healthy subjects were clinically evaluated and underwent CDEU examination of the Achilles entheses. The CDEU images were evaluated according to five distinctive CDEU features of enthesitis in the context of the enthesis organ. Results: Fifty-six of the 70 SpA patients (80%) showed at least one abnormal finding of the enthesitis on CDEU examination, affecting 91 of 140 Achilles entheses examined (65%). Only 22 of 140 Achilles entheses (15.7%) showed abnormal vascularization in the peri-sesamoidal and periosteal areas or in the area of enthesis fibrocartilage. In addition, 67 (47.9%) and 18 (12.9%) of 140 Achilles entheses examined showed cortical bone irregularities and erosions, respectively, at areas of the periosteal and the enthesis fibrocartilage. Sixteen (88.9%) of 18 clinically detected Achilles enthesitis and six (75%) of eight Achilles entheses with swelling on clinical examination presented corresponding abnormalities on CDEU examination. The Doppler twinkling artefact (TA) was observed consistently in all normal entheses and completely disappeared upon stabilization of the probe application. The C-reactive protein (CRP) level was higher in the patients with cortical bone erosion than in those without erosion. Conclusions: This study demonstrates the characteristic features of enthesitis detectable by CDEU in the context of the enthesis organ and shows a good correlation with clinical as well as with laboratory findings.

Development of Design Technology for Safety Enhancement of Damaged Ship

AbstractLoss of human lives and properties including environmental dama ge due to large scale accidents requires change of our perception to marine saf ety. IMO is trying to re-establish overall marine safety system through long term plan such as GBS. Along this line, current regulation based safety evaluation is in pro cess of changing into performance based methods, and for this transition, simulation based safety evaluation during design stage considering damage is highly necessary. In this paper, first, damage scenario is developed from IMO regulations and accident case studies. Then an integrated and simulation based safety evaluation prototype system considering both damage stability and structural safety is developed for the use during ship design process. ※Keywords: Marine accident(해양사고), Damaged ship(손상선박), Safety as sessment(안전성평가), Design technology(설계기술), Compartment modification(구획변경) 1. 서론 해양사고를 방지하고 해양사고로부터 인명과 재산 및 환경보호를 위한 각종 노력이 국제해사기구 접수일: 2008년 2월 25일, 승인일: 2009년 1월 13일✝교신저자: dklee@moeri.re.kr, 042-868-7222

Establishment of Information Interface Technology between Hull and Outfitting Designs

Ship design engineering refers to the development and design of shipbuilding architectures in a drawing which reflects all relevant manufacturing processes. This paper provides analysis methods for model-information interfaces between hull structure design and outfitting design, and a technical application for manufacturing phases reflecting the pipe support pad and angle item automatically. The existing information procedure of pipe support pad and angle system processes information using drawing without model specification. Outfitting design team directly distributes drawings to the shop floor then manual-based marking and installation work are conducted refer to the distributed drawings. As a result, this process has become time consuming and causes problems in the productivity and quality improvement due to the rework caused by omitted or incorrect marking. The pipe support pad and angle marking is a method that automatically updates model information to hull structure design using sets of data that analyse the generated model in outfitting design processes. Therefore, this approach provides an efficient solution through design references without manual activities such as a reflection of hull structure design, cutting process, numerical control work, and dimension measurement and marking. The conversion of a method from the existing procedure based on manual marking to the reflective and automatic approach would have enabled to proceed installation work without manual activities for the measurement. Therefore, this research study proposes an efficient approach using pre-data analysis of model information interfaces between design and manufacturing phases to improve productivity during construction for shipbuilding.

Design of Planning Level Ship Product Model for Ship Initial Design

This paper introduces a design of planning level ship product model (called SPPM hereinafter) based on ISO 10303 Standard for The Exchange of Product Model data (STEP). For the design of this model, the information modeling methodologies such as Integration Definition (IDEF) methods and Unified Modeling Language (UML) were reviewed, and a hybrid method was established. By using this method, ship initial design process was analyzed, and STEP-based information model and class libraries for SPPM were defined. For the data structure of this model, the shipbuilding Application Protocols (AP215, AP216 and Ship Common Model) of STEP were investigated and utilized to facilitate sharing of product model data with other CAD systems of subsequent stages. For the implementation and the verification of the model, a prototype system was developed using the ACIS geometric modeling kernel and object-oriented database management system.

Feasibility Study on High Speed Craft Considering Environment in South Korea

The Korea navy has a vital national interest in maritime security. The national strategy for maritime security focuses on preventing terrorism, crime, and hostile acts in the maritime domain. This requires the development of high speed crafts for maritime security in the South Korea domain. This paper reviews the state of the art on the development of high speed craft internationally, including efforts by the U.S. navy, and analyses the riverine environment to operate high speed crafts in South Korea. This paper makes specific proposals for high speed craft such as their main dimensions, speed, endurance, hull structure material, propulsion system, and general arrangement and 3D shape. This paper was used in the generation of basic resources for future ROC (requirement of capability) of high speed crafts using an engineering methodology.

The Safety Assessment of Small WIG Craft in the 20-Passenger Class

WIG crafts are a high speed vessel with features of dynamic supported craft. These crafts, which are predominantly of light weight and operate any substantially greater speeds than conventional craft such as bulk carrier, tanker, container ship, etc., could not be accommodated under traditional maritime safety instruments. It means that there is the need for risk and safety levels to be assessed on a holistic basis, recognizing that high levels of operator training, comprehensive and thoroughly implemented procedures, high levels of automation and sophisticated software can all make significant contributions to risk reduction. To response this requirement, the Interim Guideline for WIG craft(MSC/Circ.1054) were developed in the view of the configuration of WIG craft, which fall between the maritime and aviation regulatory regimes. This paper reviews a safety assessment process and methodology to be used in the design phase of a new ship. The process and methodology is based on the risk-based approach and is applied to safety assessment in concept development phase of small WIG craft in the 20-person class.

Model-Based Simulation for Container Loading/Unloading

Publisher Summary This chapter introduces model-based simulation system, which is able to assess ship stability during container loading/unloading using ENVISION, the general-purpose simulation system. The state-of-the-arts for simulation based design (SBD) technologies and related research, and developed container loading/unloading simulation system for high-speed medium size container ship using SBD technologies are investigated. The shape of hull form, compartment, cargo, and facilities is defined using the 3D commercial geometric modeling system. The application programs for stability assessment of ship are in-house programs. The Graphical User Interface for the visualization and control of input/output data is adopted for the efficient use of developed system. Simulation system for the visualization of stability and behavior of ship, the visualization of loading/unloading procedures, and the assessment of cranes optimal position using in-house computer aided engineering (CAE) programs, Graphical User Interface, geometric model, and simulation function is developed. SBD technologies can be applied usefully to engineering parts such as virtual shipyard, marine accident simulation, marine safety, and marine ergonomics.