Current status of a super-pressure balloon research of new design concept

A super-pressure balloon, which can reach the stratosphere with a heavy payload and continue to fly without ballasting, is quite useful for a long duration circum-polar flight. It has been quite difficult to develop such kind of balloons because of large pressure applied to the balloon film. The authors have investigated a new balloon design concept which reduces the film tension dramatically so as to enable the balloon to withstand high pressure. Experimental research has been proceeding to use the different size model balloons step by step. This report describes the current status of our research and development of the super-pressure balloon. The first successful flight test in the world for the balloon using this concept is also reported in this paper

Explosive Nucleosynthesis of Weak r-Process Elements in Extremely Metal-Poor Core-Collapse Supernovae

There have been attempts to fit the abundance patterns of extremely metal-poor stars with supernova nucleosynthesis models for the lighter elements than Zn. On the other hand, observations have revealed that the presence of EMP stars with peculiarly high ratio of "weak r-process elements" Sr, Y and Zr. Although several possible processes were suggested for the origin of these elements, the complete solution for reproducing those ratios is not found yet. In order to reproduce the abundance patterns of such stars, we investigate a model with neutron rich matter ejection from the inner region of the conventional mass-cut. We find that explosive nucleosynthesis in a high energy supernova (or "hypernova") can reproduce the high abundances of Sr, Y and Zr but that the enhancements of Sr, Y and Zr are not achieved by nucleosynthesis in a normal supernova. Our results imply that, if these elements are ejected from a normal supernova, nucleosynthesis in higher entropy flow than that of the supernova shock is required.Comment: 27pages, 15figures; ApJ accepte

Improved scientific ballooning applied to the cryo-sampling experiment at Syowa Station

On January 3, 1998, a large balloon (30000 m^3) was successfully launched at Syowa Station for the cryo-sampling of the stratospheric atmosphere. The sampling system splashed down in the Liitzow-Holm Bay and recovered by icebreaker SHIRASE. The cryo-sampling at Antarctica was the first trial in the world and the recovery of a heavy payload was also the first challenge at Syowa Station. A lot of new ballooning technologies were applied to this operation, such as compact balloon launching equipments, a reliable recovery system, a handy ground radio station for the balloon tracking and data acquisition and so forth. The realtime flight data could be received at National Institute of Polar Research (NIPR) in Tokyo by using the computer network via INMARSAT. At NIPR the collaboration members could monitor the entire process of the experiment at Syowa Station in detail and send some instructions and advice. This balloon experiment showed an extended possibility of a large scale scientific ballooning at Syowa Station. This paper deals with those newly developed balloon engineering technologies

Hybrid Textures of Neutrinos

We present numerical and comprehensive analyses of the sixty hybrid textures of neutrinos, which have an equality of matrix elements and one zero. These textures are possibly derived from the discrete symmetry. Only six textures among sixty ones are excluded by the present experimental data. Since there are many textures which give similar predictions, the textures are classified based on the numerical results. The neutrinoless double beta decay is also examined in these textures. Our results suggest that there remain still rich structures of the neutrino mass matrix in the phenomenological point of view.Comment: 19 pages, 9 figures; analytical discussions added, table and reference adde

Acquired dysfibrinogenemia: monoclonal λ-type IgA binding to fibrinogen caused lower functional plasma fibrinogen level and abnormal clot formation

ArticleInternational journal of hematology. 112(1): 96-104. (2020)journal articl

CENP-A Phosphorylation by Aurora-A in Prophase Is Required for Enrichment of Aurora-B at Inner Centromeres and for Kinetochore Function

AbstractThe Aurora (Ipl1)-related kinases are universal regulators of mitosis. We now show that Aurora-A, in addition to Aurora-B, regulates kinetochore function in human cells. A two-hybrid screen identified the kinetochore component CENP-A as a protein that interacts with Aurora-A. Aurora-A phosphorylated CENP-A in vitro on Ser-7, a residue also known to be targeted by Aurora-B. Depletion of Aurora-A or Aurora-B by RNA interference revealed that CENP-A is initially phosphorylated in prophase in a manner dependent on Aurora-A, and that this reaction appears to be required for the subsequent Aurora-B-dependent phosphorylation of CENP-A as well as for the restriction of Aurora-B to the inner centromere in prometaphase. Prevention of CENP-A phosphorylation also led to chromosome misalignment during mitosis as a result of a defect in kinetochore attachment to microtubules. Our observations suggest that phosphorylation of CENP-A on Ser-7 by Aurora-A in prophase is essential for kinetochore function

Toward understanding transcriptional regulatory networks in abiotic stress responses and tolerance in rice

長崎大学学位論文 [学位記番号]博（医歯薬）甲第1168号 [学位授与年月日]令和元年6月5

Nagasaki Schizophrenia Study: Relationship Between Ultralong-term Outcome (after 28 years) and Duration of Untreated Psychosis

Objective: Numerous studies have shown a relationship between the duration of untreated psychosis (DUP) in schizophrenia and short-termoutcome. However, few studies have investigated the relationships between DUP and the medium-term and long-term outcomes. Furthermore,we are unaware of any reports regarding the relationship between DUP and the ultralong-term outcome. This study aimed to investigate therelationship between DUP and ultralong-term outcome at 28 years in patients with schizophrenia.Method: Patients with schizophrenia completed an interview survey 28 years after their initial psychiatric examination during the period 1979-1980. It was possible to conduct the survey using suitable assessment scales in 31 patients in whom DUP was confirmed. These patients weredivided into a short DUP group and a long DUP group on the basis of the median DUP, and the outcomes of these two groups were compared.Results: Longer DUP correlated significantly with poorer symptomatic outcome; degree of social adjustment; and, global functioning. Multiplelinear regression analysis found no changes in these results even after controlling for various factors, including gender, age at onset, mode ofonset, diagnostic subtype, and premorbid adjustment.Conclusion: DUP adversely affected ultralong-term outcome of schizophrenia after 28 years. This finding supports the need to establish asystem to enable early detection and appropriate intervention for patients with schizophrenia to reduce the risk of a deleterious outcome aftermore than 25 years

Epidemiological survey of first-episode psychosis in Nagasaki, Japan: Is the incidence rate of schizophrenia changing?

The Determinants of Outcome of Severe Mental Disorders (DOSMeD) study, a global epidemiological study led by the World Health Organization, reported the annual incidence rate of schizophrenia from 1979 to 1980. In 2011, approximately 30 years later, we conducted a large-scale epidemiological study to investigate the incidence rate of first-episode schizophrenia in Nagasaki using the same method as the DOSMeD study. A telephone survey was conducted by researchers daily at 52 psychiatric hospitals, clinics, and institutes in Nagasaki. When a subject was confirmed, the researcher visited the medical facility in person to evaluate the patient’s symptoms. Of 441,706 people in Nagasaki City, 131 people were surveyed in the way, resulting in the diagnosis of psychosis in 25 patients, 20 of whom were determined to have schizophrenia. These data were used to calculate the incidence rates of psychosis (1.00 per 10,000 population; 95% confidence interval [CI], 0.54-1.46) and schizophrenia (0.80 per 10,000 population; 95% CI, 0.38-1.21). The 95% CI for the incidence rate of psychosis did not include the incidence rate for psychosis (broad definition) reported in the DOSMeD study (2.02). However, the 95% CI for the incidence rate of schizophrenia did include the incidence rate for schizophrenia (restrictive definition) reported in the DOSMeD study (1.01). Although the incidence rate of psychosis appeared to be decreasing, no significant change was found in the incidence rate of schizophrenia, comparing the present findings with those of the survey conducted 30 years ago. The incidence rate of schizophrenia is said to vary with changes in gender differences, racial differences, urbanization, and immigration; we therefore considered this possibility. In the future, it is necessary to carry out longer-term surveys covering multiple cities using the same methods