In this study, effectiveness of seismic retrofitting methods using passive damping devices was investigated through numerical analyses of short-period structures under earthquakes which have short-duration and high-frequency impulse characteristics similar to Geyongju earthquakes. Displacement spectra of elastic systems and ductility demand of inelastic systems were evaluated by increasing viscous or friction damping. The damping devices could reduce responses of the structures with shorter structural period than 0.2s. The earthquakes similar to impulse load did not induce the responses of the structures with longer period than 0.4s, and the effects of the damping devices which generates damping forces proportional to structural responses became insignificant.

In this paper, time and frequency domain characteristics of Gyeong-ju earthquakes were investigated, and nonlinear time history analyses were conducted for bi-linear hysteretic structures excited by short-duration ground accelerations. Previous studies showed that larger inelastic displacements than the peak displacement of the corresponding elastic system were observed especially for the structures with structural period shorter than 0.3s, and the similar results could be obtained when long-duration ground accelerations were used as excitation loads. For the short-duration earthquakes, however, the inelastic displacements were not so large and almost identical to the peak elastic displacements.

The goals of palliative chemotherapy are to improve overall survival and the quality of life through relief of symptoms. On the other hand, chemotherapy has many side effects, such as, myelosupression, neuropathy, gastro-intestinal symptoms, and infertility. On the many known side effects of chemotherapy, bleeding occurs in approximately 6-10% of patients with advanced cancer. Most of bleeding associated with chemotherapy is due to local vessel damage and systemic process, such as, disseminatated intravascular coagulopathy or abnormalities in platelet function or number. This symptom led to worse progression of quality of life and severe stress state in patient and their attendant. Here, the authors report a case of chemotherapy- related bleeding in maxillary cancer patient and successful achievement of hemostasis using interventional endovascular therapy.

Development of two different histologic types of lymphoma in the same person is rare. Sequential lymphoma is defined as two different types of lymphoma occurring sequentially in the same person. In particular, sequential Hodgkin’s lymphoma (HL) following non-Hodgkin’s lymphoma (NHL) is extremely rare. A 63-year-old female diagnosed with B-cell NHL at the mass in T3 received treatment with an R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine and prednisolone) protocol for six cycles. However, 12 months later, the patient complained of a left neck mass and excisional biopsy was performed. Microscopically the biopsied tissue showed Reed-Stemberg cells and confirmed the diagnosis of HL. The patient was treated with ABVD (adriamycin, bleomycin, vinblastine and dacarbazine) for four cycles. Although the possibility of a secondary malignancy cannot be excluded, this is a rare case of sequential Hodgkin’s lymphoma following Non-Hodgkin’s lymphoma.

The association between human parvovirus B19 and aplastic crisis in patients with hemolytic anemia, such as sickle-cell anemia and hereditary spherocytosis, has been well described. However, most cases of parvovirus induced-aplastic crisis in patients with hereditary spherocytosis have been reported in children or adolescents. We report on a 31-year-old female with pancytopenia who was diagnosed with aplastic crisis caused by parvovirus B19 infection in hereditary spherocytosis. It should be kept in mind that hereditary spherocytosis may initially present with aplastic crisis induced by parvovirus B19 infection in adults