A Compaction Process of Wave Dissipating Blocks Due to High Waves Simulated by 3D Lagrangian Model

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

REDISCOVERY OF AN ENIGMATIC OCTOCORAL, PSEUDOGORGIA GODEFFROYI KOLLIKER, FROM SOUTHERN AUSTRALIA AND A DISCUSSION ON ITS SYSTEMATIC POSITION

Specimens of an octocoral of blade-like form, recently collected by Mrs. Jeanette E. WATSON of the National Museum of Victoria from eastern south coasts of Australia, have been examined and revealed to be Pseudogorgia godeffroyi KOLLIKER, that was once reported in 1870 from St. Vincent Gulf in South Australia, but has never been recorded again for nearly a century and has been forgotten and neglected in recent treatments of the Octocorallia. Concerning its systematic position, KOLLIKER himself considered to be intermediate between Gorgonacea, Alcyonacea and Pennatulacea, but did not suggest a family affiliation. A few later authors treated this genus have attributed it to the Telesto-allies, though it is suspectable that they referred wholly to KOLLIKER's original description. The outstanding characteristics that a colony has a single axial polyp which alone has the gastric cavity extending to the base of the colony as a distinct axial canal, short lateral polyps imbedded in the spiculiferous coenenchyme, no axis and no creeping stolon decline to ascribe Pseudogorgia godeffroyi to any Octocorallian taxa currently diagnosed. The present octocoral is regarded to deserve criteria of a special order within the Octocorallia, apart from the Telestacea, and for this we propose to establish a family Pseudogorgiidae and further a new order Gastraxonacea as an intermediate form between Telestacea and Gorgonacea

Electromagnetic radiation due to naked singularity formation in self-similar gravitational collapse

Dynamical evolution of test fields in background geometry with a naked singularity is an important problem relevant to the Cauchy horizon instability and the observational signatures different from black hole formation. In this paper we study electromagnetic perturbations generated by a given current distribution in collapsing matter under a spherically symmetric self-similar background. Using the Green's function method, we construct the formula to evaluate the outgoing energy flux observed at the future null infinity. The contributions from "quasi-normal" modes of the self-similar system as well as "high-frequency" waves are clarified. We find a characteristic power-law time evolution of the outgoing energy flux which appears just before naked singularity formation, and give the criteria as to whether or not the outgoing energy flux diverges at the future Cauchy horizon.Comment: 20 pages, 7 figures, references added to match the published versio

メバルの生活史について

京都大学0048新制・課程博士理学博士理博第60号新制||理||25(附属図書館)UT51-40-C315京都大学大学院理学研究科動物学専攻(主査)教授 宮地 傳三郎, 教授 市川 衞, 教授 中村 健児学位規則第5条第1項該当Kyoto UniversityDFA

DEM-based Group Behaviour Model and Its Impact in Tsunami Evacuation Simulation

Most of the existing crowd behavior models simulate crowd motions based on interactions among isolated walking individuals. In reality, a crowd not only contains individuals who walk alone, but walk in groups as well. Hence, the interactions should be extended among individuals who belong to the same group as well as among individuals and different groups’ persons. Limited number of works has incorporate group behavior in crowd behavior models. This topic is still new and its impact in crowd dynamics is more to be discovered. Driven by the belief of group behavior modeling can lead to a more realistic crowd motions, this paper is objectively to model group behavior in crowd behavior simulation and its impact in tsunami evacuation process. For this, observations and video footages of public area had been conducted as a basis of group behavior model development. Relying on observations made, the existing Distinct Element Method (DEM)-based Crowd Behavior Simulator for Disaster Evacuation (CBS-DE) is extended to incorporate group behavior by introducing in-group and out-group interactions. Validation on the extended CBS-DE was executed in two stages work; (1) looking for a suitable grouping scenario from the observations conducted; and (2) the simulation of a suitable scenario in (1). It shows that the CBS-DE with group behavior model can realistically simulate group behavior. Later, the new model was demonstrated in the simulation of tsunami evacuation process. The effects of the group behavior model were shown in the context of evacuation completion time by comparison with the CBS-DE without group behavior model. Keywords: DEM, group behaviour, in-group interaction, out-group interaction

Discrete Crowd Model for Simulation of Tsunami-Flood Refuge

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Pathogenesis and treatment of multiple myeloma bone disease

Multiple myeloma (Plasma cell myeloma), a malignancy of the plasma cells, exhibits tumor expansion preferentially in the bone marrow and the development of bone-destructive lesions. Multiple myeloma is still an incurable disease with changes in the bone marrow microenvironment in favor of the survival and proliferation of multiple myeloma cells and bone destruction. In this review, we described the recent findings on the regulators involved in the development of myeloma bone diseases, and succinctly summarize currently available therapeutic options and the development of novel bone modifying agents for myeloma treatment