Timing of Convertible Debt Financing and Investment

In this paper, we examine the optimal investment policy of the firm which is financed by issuing equity, straight debt and convertible debt. We extend the model in Mauer and Sarkar (2005) over financing with convertible debt. We examine two different investment policies that maximize the equity value and the firm value and show the agency cost as the difference between each policy value. Furthermore, we investigate how the issuance of convertible debt affects investment.

Red photoluminescence in praseodymium-doped titanate perovskite films epitaxially grown by pulsed laser deposition

Intense red photoluminescence (PL) under ultraviolet (UV) excitation was observed in epitaxially grown Pr-doped Ca0.6Sr0.4TiO3 perovskite films. The films were grown on SrTiO3 (100) substrates by pulsed laser deposition, and their epitaxial growth was confirmed by x-ray diffraction and reflected high-energy electron diffraction. The observed sharp PL peak centered at 610 nm was assigned to the transition of Pr3+ ions from the 1D2 state to the 3H4 state. The PL intensity was markedly enhanced by postannealing treatments at 1000 °C, above the film-growth temperature of 600 or 800 °C. Because the excitation and absorption spectra are similar to each other, it was suggested that the UV energy absorbed by the host lattice was transferred to the Pr ions, resulting in the red luminescence

Stratigraphic and Petrological Insights into the Late Jurassic– Early Cretaceous Tectonic Framework of the Northwest Pacific Margin

Late Jurassic–Early Cretaceous volcano‐sedimentary sequences in the Sorachi, Kumaneshiri, and Yezo groups are exposed in central Hokkaido. The sequences are considered to reflect the Late Mesozoic tectonic history of the northwest Pacific continental margin. Based on the stratigraphic and petrological characteristics of igneous and volcaniclastic rocks of the Sorachi, Yezo, and Kabato groups, Late Jurassic–Early Cretaceous tectonics in central Hokkaido can be divided into six stages. Stage I (Tithonian) is characterized by extensive eruption of tholeiitic basalt accompanied with andesitic volcaniclastic rocks and terrigenous deposits. Seafloor spreading or large igneous province formation occurred near an island arc and/or continent during this stage. In Stage II, island arc volcanic islands were constructed on the basaltic rocks formed during Stage I. Stage III (latest Berriasian‐Valanginian) is characterized by the formation of pull‐apart basins accompanied by seafloor spreading. Widespread upwelling of the asthenosphere below central Hokkaido may have occurred during this stage. After the cessation of in situ volcanism in Stage IV (Hauterivian), submarine island arc volcanism reoccurred in Stage V (Barremian). In Stage VI (Aptian–Campanian), typical active continental margin volcanism occurred and voluminous granitic batholiths were formed in western Hokkaido

前立腺癌におけるセンチネルリンパ節概念の妥当性について

取得学位 : 博士（医学）, 学位授与番号 : 医博甲第1653号, 学位授与年月日 : 平成16年9月30日, 学位授与大学 : 金沢大

Nonlinear Electrical Properties of Thin Films of a Light-Emitting Perovskite-Type Oxide Pr0.002(Ca0.6Sr0.4)0.997TiO3

AbstractDouble-insulating thin film type electroluminescent (EL) devices based on Pr0.002(Ca0.6Sr0.4)0.997TiO3 (PCSTO) and developed by Takashima et al. [Adv. Mater. 2009; 21; 3699-3702] emits pure red light with the wavelength λ = 610nm under application of remarkably small voltage less than 10 Vrms. Since PCSTO is a perovskite-type oxide being chemically and thermally stable, the discovered small-voltage EL phenomenon may open a new application field of inorganic EL devices. Clarification of the EL mechanism will provide guidelines for improving the EL efficiency, which is a key of commercialization. As the first step on this way, PCSTO films sandwiched directly by electrodes have been prepared and their nonlinear electrical properties have been analyzed. In addition, EL from these metal-insulator-metal type devices has been detected and a preliminary discussion about it has been made