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Primary neoplasms of the epididymis are quite rare, but most have benign and cystic natures. Papillary cystadenoma of the epididymis occurs most often in young adults and produces either mild local discomfort, dull pain or no symptoms. This tumor has characteristic histopathologic findings which show affinities to many of the mesonephric tumors of the female genital tract. It is experienced a case of papillary cystadenoma of the left epididymis in young man who was treated with reselection of adenomatoid tumor at the same site one year ago. Authors report a case of papillary cystadenoma which was resected with good result and review of the literature.
The relationship between the oil price and Korean won/dollar real exchange rate is empirically investigated using VAR. From the Granger causality test, the volatility of exchange rate causes the volatility of oil price. This implies that the exchange rate is fundamentally a forward looking variable that embodies the information about future oil price movements. Also, the recent decline in oil price may be due to the appreciation of U.S. dollar, in addition to the excess supply in the world oil market. However, the impact on exchange rate of oil price is negligible based on impulse response function analysis.
Hetero-dimer anions of naphthalene (Np), anthracene (An), phenanthrene (Ph) and pyrene (Py) were investigated using the time-of-flight mass spectrometer (TOF-MS), anion photoelectron spectroscopy (PES) and theoretical calculation. There are two possible geometries with their electron affinity (EA) difference: parallel displaced (PD) and T-shaped. Dispersion force plays a key role in PD structure with the formation of a new anionic core while π-hydrogen interaction plays a key role in T-shaped structure with the monomer anionic core. The optimized structures and charge distributions can simply be explained by the relative difference of EA.
The objective of this study was to investigate the validity of the digital ergonomic simulation (DES) method as a prospective alternative to the ergonomic analyses conducted by experts. The DES method utilizes commercial digital manufacturing software, and can compute the RULA scores continuously throughout the simulated work cycle. It was shown in a case study that the accuracy and objectivity of the DES method are superior to those obtained by experts. Also, it was demonstrated that the DES method has a distinct capability to simulate and validate a proposed work plan. Major limitations of the current DES method lie in the extensive time and efforts required for accurate digital simulation, which may be overcome through an automatic module for RULA data acquisition and a motion capture system.