| JaLCDOI | 10.18926/fest/11595 |
|---|---|
| FullText URL | 002_009_017.pdf |
| Author | Ishikawa, Hirofumi| |
| Abstract | In this paper, we have calculated the elliptic singularities of the symmetric Hilbert modular group defined over a real quadratic number field. Applying those to the dimension formula, we tabulate the dimensions of the space of symmetric Hilbert modular forms of weight two satisfying certain cusp condition. |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1997-01-10 |
| Volume | volume2 |
| Issue | issue1 |
| Start Page | 9 |
| End Page | 17 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313960 |
| JaLCDOI | 10.18926/fest/11610 |
|---|---|
| FullText URL | 001_047_053.pdf |
| Author | Sasaki, Toru| Ishikawa, Hirofumi| Kajiwara, Tsuyoshi| Watanabe, Masaji| |
| Abstract | We treat the problem of water pollution by the method of a mathematical model. We illustrate the method of analysis with Kojima Lake. We analyze in-flow and out-flow of the lake, compute numerical solutions of the governing equations of the water flow and the pollutant. The simulation leads to the conclusion concerning the figure of Kojima Lake. |
| Keywords | Kojima lake Water analysis Finite element method |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 1996-03 |
| Volume | volume1 |
| Issue | issue1 |
| Start Page | 47 |
| End Page | 53 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002313787 |
| JaLCDOI | 10.18926/fest/12816 |
|---|---|
| Title Alternative | Statistical modeling for analysis of malaria epidemic behavior at Ishigaki Island |
| FullText URL | 13_007_015.pdf |
| Author | Ueki, Masao| Nakagawa, Yuuki| Fueda, Kaoru| Ishikawa, Hirofumi| |
| Abstract | It is necessary to consider a stochastic variability in modeling malaria epidemic behavior since the malaria infection cycle essentially depends on stochastic elements. For this requirement, we need to construct an appropriate statistical model from available data in advance. In this report, we provide some statistical models for the analysis of malaria epidemic behavior at Ishigaki Island. These models can be used for recurrence of past malaria epidemic and prediction of future malaria epidemic at Ishigaki Island. |
| Keywords | Anopheles minimus, generalized liner model Ishigaki Island malaria epidemic behavior prediction stochastic model |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2008-03 |
| Volume | volume13 |
| Issue | issue1 |
| Start Page | 7 |
| End Page | 15 |
| ISSN | 1341-9099 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002304876 |
| JaLCDOI | 10.18926/fest/12819 |
|---|---|
| FullText URL | 13_023_033.pdf |
| Author | Zenihana, Tomohiro| Hisakane, Naoto| Morimoto, Tomoko| Ishikawa, Hirofumi| |
| Abstract | We carried out simulations of various scenarios for bioterrorist attacks using smallpox occurring in a virtual area set up on the basis of the census of Okayama-city, Japan, which predict the effect of control strategies against bioterrorism and the loss scale. On simulating a smallpox epidemic, we followed the method of the Individual Based Model stochastically, which can treat the population in the virtual area as individuals. Individuals have personal information, behavior patterns, and interactions among social groups. We took into consideration the influence of residual immunity due to past vaccination. We considered Traced Vaccination (TV) and Mass Vaccination (MV) strategies against bioterrorism. We investigated the effect of TV and MV strategies on the suppression of smallpox epidemics. Consequently, the TV strategy was found to have higher effectiveness than the MV strategy. |
| Keywords | smallpox bioterrorism Individual Based Model Traced Vaccination Mass Vaccination |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2008-03 |
| Volume | volume13 |
| Issue | issue1 |
| Start Page | 23 |
| End Page | 33 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002304844 |
| JaLCDOI | 10.18926/fest/15042 |
|---|---|
| FullText URL | 014_001_012.pdf |
| Author | Morimoto, Tomoko| Zenihana, Tomohiro| Maitani, Yusuke| Ishikawa, Hirofumi| |
| Abstract | The spread of the highly pathogenic avian influenza (H5N1) among domestic poultry and wild birds has caused global concern over the outbreak of an influenza pandemic of H5N1. The "Pandemic Influenza Preparedness Action Plan" determines the strategy against an influenza pandemic in Japan. Simulations were carried out using an individual based model (IBM). The IBM targeted a virtual area with a population of 100,000 using the demographic data of Sapporo-city, Hokkaido. The effectiveness of targeted antiviral prophylaxis (TAP), geographical targeted antiviral prophylaxis (GTAP), school closure, and pre-pandemic vaccination were explored. Moreover, this study focused on infections among children, who have a high attack rate, and analyzed the effectiveness of interventions for school-age targeted antiviral prophylaxis (STAP). Consequently, TAP, which is recommended by the "Pandemic Influenza Preparedness Action Plan", was found to have high effectiveness in the suppression of the outbreak. Moreover, this study showed the importance of intervention among children, such as STAP and school closure, to prevent the spread of H5N1 influenza. |
| Keywords | Influenza Pandemic H5N1 Individual Based Model (IBM) Sapporo |
| Publication Title | 岡山大学環境理工学部研究報告 |
| Published Date | 2009-03-16 |
| Volume | volume14 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 11 |
| ISSN | 1341-9099 |
| language | English |
| File Version | publisher |
| NAID | 120002307373 |
| JaLCDOI | 10.18926/AMO/32275 |
|---|---|
| FullText URL | fulltext.pdf |
| Author | Harada, Masakazu| Ishikawa, Hirofumi| Matsuoka, Hiroyuki| Ishii, Akira| Suguri, Setsuo| |
| Abstract | We developed a sensitive polymerase chain reaction (PCR) method for the detection of Plasmodium falciparum DNA from mosquitoes collected in the field. Plasmodium falciparum was detected from 15.2% of 1-parous mosquitoes, Anopheles farauti, in the Solomon Islands through use of the PCR method. A novel mathematical model was developed to estimate the sporozoite rate based on the malaria-positive rate of 1-parous mosquitoes. Using this model, the sporozoite rate of Anopheles farauti in the Solomon Islands was calculated to be 0.09%. This method enables estimation of the sporozoite rate based on a relatively small number (100-200) of mosquitoes compared with the number needed for the ELISA method. |
| Keywords | sporozoite rate polymerase chain reaction (PCR) mathematical model Anopheles Plasmodium |
| Amo Type | Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2000-08 |
| Volume | volume54 |
| Issue | issue4 |
| Publisher | Okayama University Medical School |
| Start Page | 165 |
| End Page | 171 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 10985176 |
| Web of Science KeyUT | 000089132800004 |
