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Aini Ab-Aziz,Thanuja Mahaletchumy,정준기 대한핵의학회 2013 핵의학 분자영상 Vol.47 No.4
Background: Skin metastases from either prostate adenocarcinoma or multiple myeloma rarely occur. We report the case of a 73-year-old man with multiple myeloma who presented with multiple subcutaneous nodules 3 years after his initial diagnosis. Methods: Fluorine-18 fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) imaging was suggestive of a concomitant second primary from the prostate. Results: This case highlights not only a rare initial manifestation of prostate cancer, but also the role of 18F-FDG-PET/CT in detecting a clinically unsuspected second malignancy. Conclusion: It potentially corroborates the possible association of both diseases, as has been reported before.
Nur Aini Masruroh,Yun Prihantina Mulyani 대한산업공학회 2013 Industrial Engineeering & Management Systems Vol.12 No.3
Revenue management (RM) has been widely used to model products characterized as perishable. Classical RM model assumed that price is the sole factor in the model. Thus price adjustment becomes a crucial and costly factor in business. In this paper, an optimal pricing model is developed based on minimization of soft customer cost, one kind of price adjustment cost and is solved by Lagrange multiplier method. It is formed by expected discounted revenue/bid price integrating quantity-based RM and pricing-based RM. Quantity-based RM consists of two capacity models, namely, booking limit and overbooking. Booking limit, built by assuming uncertain customer arrival, decides the optimal capacity allocation for two market segments. Overbooking determines the level of accepted order exceeding capacity to anticipate probability of cancellation. Furthermore, pricing-based RM models occupancy/ demand rate influenced by internal and competitor price changes. In this paper, a mathematical model based on game theoretic approach is developed for two conditions of deterministic and stochastic demand. Based on the equilibrium point, the best strategy for both hotels can be determined.
Ion Migration in Metal Halide Perovskites
Nur'aini, Anafi,Lee, Seokwon,Oh, Ilwhan The Korean Electrochemical Society 2022 Journal of electrochemical science and technology Vol.13 No.1
Metal halide perovskites are promising photovoltaic materials, but they still have some issues that need to be solved. Hysteresis is a phenomenon that strongly is correlated with ion migration; thus, a fast, easy, and low-temperature method for measuring ion migration is required. Through selective blocking, ion migration can be measured separately, apart from electron migration. In this study, ion migration in metal halide perovskites was measured using a vertical device. At different temperatures, ionic activation energies were obtained for a range of perovskite compositions such as MAPbI<sub>3</sub>, FAPbI<sub>3</sub>, CsPbI<sub>3</sub>, and MAPbBr<sub>3</sub>. By comparing the measured ionic activation energies with the theoretical values, we conclude that among other possibilities, I<sup>-</sup> is the migrating ion in MAPbI<sub>3</sub>, FAPbI<sub>3</sub>, CsPbI<sub>3</sub>, and Br- is the migrating in MAPbBr<sub>3</sub>.