Expectations for “SHAW” and its Perspectives

No abstract available.

A Study of Cognitive Slips According to Contaminants on the Floor

BACKGROUND: This research investigates the degrees of slipperiness felt by the participants who walk on contaminants applied to a floor surface to decide degrees of slipperiness for various contaminants. METHODS: For the experiment, 30 participants walked on a floor to which six contaminants were applied. All participants took the analytic hierarchy process (AHP)–based slipperiness questionnaire survey for the six kinds of contaminants, and the results were compared with the coefficient of friction. RESULTS: The results of slip risk from the AHP indicate that grease is the most slippery of the six contaminants, followed by diesel engine oil, hydraulic oil, cooking oil, water-soluble cutting oil, and water in a decreasing order of slipperiness. When the results of slip risk from the AHP are compared with the static coefficient of friction for each contaminant, the order of slip risk follows the same trend. Although the results of slip risk from the AHP coincide with the static coefficient of friction, further study would be needed to investigate this relationship. CONCLUSION: This study will contribute as reference material for future research on preventing industrial accidents that result in falls from high places due to slipping.

Immunoglobulin G4-Related Systemic Sclerosing Disease: A Case Involving the Ureter and Kidney

Immunoglobulin (Ig) G4-related sclerosing disease is a newly defined clinicopathological entity characterized by lymphoplasmacytic infiltration of IgG4-positive plasma cells and varying degrees of fibrosis within affected tissues. Patients usually exhibit multisystem involvement and often respond well to steroid and immunosuppressive therapy. This report presents a case of IgG4-related sclerosing disease involving the ureter and kidney. We hope to bring IgG4-related sclerosing disease to the attention of urologists, because it is an uncommon disease that commonly responds to systemic corticosteroids.

A Rare Case of Upper Ureter Rupture: Ureteral Perforation Caused by Urinary Retention

Perforation of the ureter is a rare condition that causes a series of problems including retroperitoneal urinoma, urosepsis, abscess formation, infection, and subsequent renal impairment. There are causative factors that induce ureteric rupture, including malignancy, urinary calculi, idiopathic retroperitoneal fibrosis, recent iatrogenic manipulation, external trauma, degenerative kidney conditions, urography with external compression, and spontaneous causes. We report a rare case of ureteric rupture caused by urinary retention. The patient was treated with temporary percutaneous drainage and antibiotics. The present case illustrates that urinary retention can induce not only bladder rupture, but also ureteric rupture. It is thus of paramount importance to effectively manage patients with voiding problems.

Advantage of Laparoscopic Appendectomy for Perforated Appendicitis / 대한내시경복강경외과학회지

PURPOSE: Laparoscopic appendectomy (LA) is currently more popular than an open appendectomy (OA), because of its advantages, such as a decrease in postoperative pain, short hospitalization and quick recovery. On the other hand, the efficacy and safety of a laparoscopic appendectomy for complicated appendicitis is controversial. Therefore, this study compared the efficacy and safety of LA and OA. METHODS: This study reviewed retrospectively 262 patients with perforated appendicitis who underwent ether open or laparoscoic appendectomy between January 2001 and December 2010. The medical record and video were used to collect data. The operative time, length of hospital stay, time to diet, time to remove drain and complications were assessed. RESULTS: There were 207 and 55 patients in the OA and LA group, respectively. The operation times were significantly longer in the LA group than the OA group (OA group 68.25+/-33.08 vs. LA group 90.80+/-47.64 min) (p<0.05). The length of hospital stay was longer in the OA group than the LA group (OA group 10.96+/-5.24 vs. LA group 8.86+/-5.18 days) (p<0.05). The time to diet and time to remove the drain was longer in the OA group than the LA group (p<0.05). The postoperative complication rate was similar in the two groups. CONCLUSION: The operative time was longer in the LA group but the length of hospital stay, time to diet, and time to remove drain was longer in the OA group. Such merits show that laparoscopic appendectomy is a good surgical option for perforated appendicitis.

Renal Cell Carcinoma in a Right Malrotated Kidney

The authors report a case of renal cell carcinoma in a right malrotated (horizontal axis) kidney. The patient was treated by hand-assisted laparoscopic radical nephrectomy. This is the first report of a horizontal axis malrotated kidney with renal cell carcinoma.

A Case Study on Engineering Failure Analysis of Link Chain

OBJECTIVES: The objective of this study was to investigate the effect of chain installation condition on stress distribution that could eventually cause disastrous failure from sudden deformation and geometric rupture. METHODS: Fractographic method used for the failed chain indicates that over-stress was considered as the root cause of failure. 3D modeling and finite element analysis for the chain, used in a crane hook, were performed with a three-dimensional interactive application program, CATIA, commercial finite element analysis and computational fluid dynamic software, ANSYS. RESULTS: The results showed that the state of stress was changed depending on the initial position of the chain that was installed in the hook. Especially, the magnitude of the stress was strongly affected by the bending forces, which are 2.5 times greater (under the simulation condition currently investigated) than that from the plain tensile load. Also, it was noted that the change of load state is strongly related to the failure of parts. The chain can hold an ultimate load of about 8 tons with only the tensile load acting on it. CONCLUSION: The conclusions of this research clearly showed that a reduction of the loss from similar incidents can be achieved when an operator properly handles the installation of the chain.

A Case Study on Engineering Failure Analysis of Link Chain

OBJECTIVES: The objective of this study was to investigate the effect of chain installation condition on stress distribution that could eventually cause disastrous failure from sudden deformation and geometric rupture. METHODS: Fractographic method used for the failed chain indicates that over-stress was considered as the root cause of failure. 3D modeling and finite element analysis for the chain, used in a crane hook, were performed with a three-dimensional interactive application program, CATIA, commercial finite element analysis and computational fluid dynamic software, ANSYS. RESULTS: The results showed that the state of stress was changed depending on the initial position of the chain that was installed in the hook. Especially, the magnitude of the stress was strongly affected by the bending forces, which are 2.5 times greater (under the simulation condition currently investigated) than that from the plain tensile load. Also, it was noted that the change of load state is strongly related to the failure of parts. The chain can hold an ultimate load of about 8 tons with only the tensile load acting on it. CONCLUSION: The conclusions of this research clearly showed that a reduction of the loss from similar incidents can be achieved when an operator properly handles the installation of the chain.