AKARI INFRARED CAMERA SURVEY OF THE LARGE MAGELLANIC CLOUD. I. POINT-SOURCE CATALOG

Kato, Daisuke,Ita, Yoshifusa,Onaka, Takashi,Tanabé,, Toshihiko,Shimonishi, Takashi,Sakon, Itsuki,Kaneda, Hidehiro,Kawamura, Akiko,Wada, Takehiko,Usui, Fumihiko,Koo, Bon-Chul,Matsuura, Mikako,Tak American Institute of Physics 2012 The Astronomical journal Vol.144 No.6

<P>We present a near- to mid-infrared point-source catalog of five photometric bands at 3.2, 7, 11, 15, and 24 μm for a 10 deg<SUP>2</SUP> area of the Large Magellanic Cloud (LMC) obtained with the Infrared Camera on board the AKARI satellite. To cover the survey area the observations were carried out at three separate seasons from 2006 May to June, 2006 October to December, and 2007 March to July. The 10σ limiting magnitudes of the present survey are 17.9, 13.8, 12.4, 9.9, and 8.6 mag at 3.2, 7, 11, 15, and 24 μm, respectively. The photometric accuracy is estimated to be about 0.1 mag at 3.2 μm and 0.06-0.07 mag in the other bands. The position accuracy is 0<img entity='farcs' SRC='http://ej.iop.org/icons/Entities/farcs.gif' ALT='farcs' ALIGN='BOTTOM' />3 at 3.2, 7, and 11 μm and 1<img entity='farcs' SRC='http://ej.iop.org/icons/Entities/farcs.gif' ALT='farcs' ALIGN='BOTTOM' />0 at 15 and 24 μm. The sensitivities at 3.2, 7, and 24 μm are roughly comparable to those of the Spitzer SAGE LMC point-source catalog, while the AKARIcatalog provides the data at 11 and 15 μm, covering the mid-infrared spectral range contiguously. Two types of catalog are provided: a Catalog and an Archive. The Archive contains all the detected sources, while the Catalog only includes the sources that have a counterpart in the Spitzer SAGE point-source catalog. The Archive contains about 650,000, 140,000, 97,000, 43,000, and 52,000 sources at 3.2, 7, 11, 15, and 24 μm, respectively. Based on the catalog, we discuss the luminosity functions at each band, the color-color diagram, and the color-magnitude diagram using the 3.2, 7, and 11 μm band data. Stars without circumstellar envelopes, dusty C-rich and O-rich stars, young stellar objects, and background galaxies are located at distinct regions in the diagrams, suggesting that the present catalog is useful for the classification of objects toward the LMC.</P>

Poster Session : PS 0339 ; Hematology : Study of Multiple Neoplasms Including Hematological Malignancies and Lung Cancer

( Daisuke Nagase ),( Susumu Ishihara ),( Akiko Sakai ),( Motohiro Kato ),( Yasunobu Kuraishi ),( Kazuho Arai ),( Haruka Izumi ),( Kazuhiko Natori ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: It is a well-known fact that the prevalence of malignancy increases year by year. In addition, other malignancies may be found in the systemic screening before treatment or after several therapy during observation. Malignant lymphoma is often the most number of patients. We reviewed the complication with lung cancer that was a poor prognosis. We look for possibility of the prognosis improvement by determining a characteristic. Methods: In 290 cases multiple cancer including hematological malignancy in our department, we examined 20 cases that including lung cancer & malignant lymphoma. Reviewed the following is gender, age, outbreak style, strategy of therapy, clinical income, and overall survival. Diagnostic criteria of multiple cancer is according to Warren&Gates. It was distinguish synchronous and metachronous that synchronous double cancer diagnosed interval of 6 months. Results: The subjects were 20 patients, median age was 70 years. Synchronous cancer was found in 5 patients and metachronous in 15 patients. Malignant lymphoma was non-Hodgkin`s lymphoma in 11 patients, Hodgkin`s lymphomain 2 patients and lymphoma- stage mycosis fungoides in 1patient. Acute myelogeneous leukemia 3 cases, myelodysplastic syndrome 3 cases. All of the patients with ML underwent chemotherapy (CTx) and 8 and 4 of them achieved completeand partial remission, respectively, while 2cases had progressive disease. In 20 cases with LC, operation (Ope) alone was conducted in 6 cases, Ope+ adjuvant therapy in 3 cases, radiation therapy (RTx) in 1case, RTx + CTx in 1case, and CTx alone in 7 cases, non therapy 2 cases. The median survival was 11 months. Conclusions: For metachronous type, there is chance to fi nd second cancer, if they observed long time. I think that we must understand he has or will have another cancer. Prognosis improvement of the advanced lung cancer is expected.

Application of multi-buffer layer of (Zn,Mg)O/CdS in Cu2ZnSn(S,Se)4 solar cells

Daisuke Hironiwa,Jakapan Chantana,Noriyuki Sakai,Takuya Kato,Hiroki Sugimoto,Takashi Minemoto 한국물리학회 2015 Current Applied Physics Vol.15 No.3

(Zn,Mg)O (ZMO) buffer layer has attracted attention for having the potential to control the conduction band offset of buffer layer and large band-gap (Eg) Cu2ZnSn(S,Se)4 (CZTSSe) absorber interface, where the ZMO layer is deposited by the sputtering. However, the solar cell efficiency is decreased with the ZMO layer as compared with the CdS layer. The decrease in conversion efficiency is attributed to the sputtering damage on the absorber and high light reflection from the surfaces of CZTSSe solar cells. To completely suppress the damage, a CdS layer with very thin thickness of 20 nm is inserted between the ZMO layer and the CZTSSe layer. In addition, MgF2 layers are deposited on CZTSSe solar cells as anti-reflection coating. Ultimately, the solar cell with multi-buffer layer of ZMO/thin-CdS is almost same level as that with the CdS layer. Therefore, the multi-buffer layer can be an appropriate buffer layer of the large-Eg CZTSSe layer.

Evaluation of Interlayer Exchange Coupling in α-Fe(100)/Nd2Fe14B(001) Films

Daisuke Ogawa,Kunihiro Koike,Hiroaki Kato,Shigemi Mizukami,Takamichi Miyazaki,Mikihiko Oogane,Yasuo Ando 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3

We fabricated α-Fe(100)/Nd2Fe14B(001) bilayer films with different thicknesses values of the-Fe layer on MgO(100) substrates by using an ultra-high-vacuum (UHV) magnetron sputteringsystem. The exchange coupling constant at the heterointerfaces of α-Fe(100)/Nd2Fe14B(001) wasevaluated by analyzing the magnetization curves and the ferromagnetic resonance (FMR) spectra. We observed a significant lower shift of the α-Fe resonance field compared to that of the α-Fe singlelayer irrespective of the Fe-layer thickness, which suggests the existence of an internal field owingto a positive exchange coupling between the -Fe(100) and the Nd2Fe14B(001) layers.

Radio-photoluminescence properties of CaF2 transparent and opaque ceramics

Kato Takumi,Nakauchi Daisuke,Kawaguchi Noriaki,Yanagida Takayuki 한국물리학회 2020 Current Applied Physics Vol.20 No.11

Radio-photoluminescence (RPL) phenomenon was observed in CaF2 transparent and opaque ceramics by X-ray irradiation. The RPL appeared as a formation of photoluminescence (PL) emission bands located around 660 and 720 nm caused by F2+ and (F2+)A centers, respectively. The RPL signal can be deleted by heating, and reusability was observed over ten experimental cycles. The fading of the RPL signal was confirmed to be ~4% in 10 days. The detectable RPL response of CaF2 transparent ceramics was as low as 1 mGy, and the dynamic ranges were confirmed over 1–10000 mGy with linear response.

Ten-Year Results of Reconstruction for Rheumatoid Cervical Spine Lesions and Occurrence Factor of Subaxial Subluxation

Daisuke Kurogochi,Jun Takahashi,Masashi Uehara,Shota Ikegami,Shugo Kuraishi,Toshimasa Futatsugi,Hiroki Oba,Takashi Takizawa,Ryo Munakata,Terue Hatakenaka,Michihiko Koseki,Hiroyuki Kato 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.5

Study Design: Retrospective chart review. Purpose: This study evaluated long-term surgical outcomes of computer-assisted reconstruction using transarticular or cervical pedicle screws for cervical spine lesions caused by advanced rheumatoid arthritis (RA). Overview of Literature: We routinely employ C1–C2 transarticular and cervical pedicle screw instrumentation to reconstruct advanced and unstable RA cervical lesions. However, few reports are available on the long-term results of surgical reconstruction for rheumatoid cervical disorders, particularly regarding cervical pedicle screw fixation. Methods: Six subjects (all female) with RA cervical lesions who underwent atlantoaxial or occipitocervical fixation and were followed for at least 10 years were retrospectively studied. A frameless, stereotactic, optoelectronic, computed tomography-based image guidance system was used for correct screw placement. Variables including the Japanese Orthopaedic Association score, EuroQol, Ranawat value, and C2–C7 angle before and 2, 5, and 10 years after surgery were assessed along with the occurrence of subaxial subluxation (SAS). Results: Mean age at initial surgery was 58.2±7 years (range, 51–68 years), and mean follow-up period was 141±11 months (range, 122–153 months). Lesions included atlantoaxial subluxation (AAS, n=2) and AAS+vertical subluxation (n=4). Mean C2–C7 lordotic angle before and 2, 5, and 10 years after surgery was 20.1°±6.1°, 21.0°±4.0°, 18.8°±4.7°, and 17.8°±5.3°, respectively. SAS did not occur in cases maintaining the C2–C7 lordotic angle. In two cases where the C2–C7 lordotic angle declined from 5 years postoperatively, SAS occurred at the C2–C3 level in one and at the C4–C5 level in the other, both of which required reoperation. Conclusions: Patients with rheumatoid cervical lesions who undergo atlantoaxial or occipitocervical fixation using C1–C2 transarticular or pedicle screws carry a risk of SAS for up to 10 years postoperatively, which may require reoperation.

Prognostic factors for patients with cervical cancer treated with concurrent chemoradiotherapy:a retrospective analysis in a Japanese cohort

Daisuke Endo,Yukiharu Todo,Kazuhira Okamoto,Shinichiro Minobe,Hidenori Kato,Noriaki Nishiyama 대한부인종양학회 2015 Journal of Gynecologic Oncology Vol.26 No.1

Objective: Concurrent chemoradiotherapy (CCRT) is the primary treatment for locally advanced cervical cancer. We studied prognostic factors for patients treated with CCRT. Methods: We retrospectively reviewed records of 85 consecutive patients with cervical cancer who were treated with CCRT between 2002 and 2011, with external beam radiation therapy, intracavitary brachytherapy, and platinum-based chemotherapy. Survival data were analyzed with Kaplan-Meier methods and Cox proportional hazard models. Results: Of the 85 patients, 69 patients (81%) had International Federation of Gynecology and Obstetrics (FIGO) stage III/IV disease; 25 patients (29%) had pelvic lymph node enlargement (based on magnetic resonance imaging), and 64 patients (75%) achieved clinical remission following treatment. Median maximum tumor diameter was 5.5 cm. The 3- and 5-year overall survival rates were 60.3% and 55.5%, respectively. Cox regression analysis showed tumor diameter >6 cm (hazard ratio [HR], 2.3; 95% confidence interval [CI], 1.2 to 4.6), pelvic lymph node enlargement (HR, 2.2; 95% CI, 1.1 to 4.5), and distant metastasis (HR, 10.0; 95% CI, 3.7 to 27.0) were significantly and independently related to poor outcomes. Conclusion: New treatment strategies should be considered for locally advanced cervical cancers with tumors >6 cm and radiologically enlarged pelvic lymph nodes.

ELB in IP/NGEO Satellite Constellations: Issues and Solutions

Mashimo, Daisuke,Taleb, Tarik,Hashimoto, Kazuo,Nemoto, Yoshiaki,Kato, Nei 통신위성우주산업연구회 2006 Joint Conference on Satellite Communications Vol.2006 No.-

To ensure an intelligent engineering of traffic over satellite networks, the authors have recently proposed a routing protocol dubbed Explicit Load Balancing (ELB). The protocol enables neighboring satellites to explicitly exchange information on their congestion status. A satellite that is about to get congested requests its neighboring satellites to decrease their data forwarding rates. In response, the neighboring satellites search for less congested paths that do not include the satellite in question and communicate a portion of data, primarily destined to the satellite, via the retrieved paths. While transmitting packets of the same flow over different links helps to better distribute the traffic over the satellite constellation, and accordingly alleviates congestion and avoids packet drops, it leads to the reception of packets in an out-of-order manner at the receiver side. In case of TCP, this phenomenon results in the transmission of duplicate acknowledgments, unnecessarily halves the congestion window of TCP, and ultimately degrades the throughput. As a remedy to this issue, we suggest that receivers refer to the Time-to-Live (TTL) field of packet headers to judge whether the out of order in the reception of packets is due to congestion or simply to changes in the communication path. Furthermore, as packets have to traverse more hops in ELB, delay-sensitive applications may get affected by the extra delay due to hops. To cope with such an issue, we consider the use of differentiated services we classify users into a number of classes, namely delay sensitive, throughput-sensitive, and best effort. Via simulations, we demonstrate the efficiency of ELB in such environments.

A Traffic Congestion Avoidance Scheme for LEO Satellite Networks by Using Traffic Detour Technique

Mashimo, Daisuke,Taleb, Tarik,Jamalipour, Abbas,Kato, Nei,Nemoto, Yoshiaki 통신위성우주산업연구회 2005 Joint Conference on Satellite Communications Vol.2005 No.-

Given that wired network infrastructure is not yet ready in more than half of the world, satellite networks attrack attention as an important choice to build global communication networks. Satellite networks must deal by a communication demand of different quantity in every area due to most of the world people live around the equator or in middle latitude area. In addition, distribution of traffic becomes more unbalanced due to population density is different in a city and a district. As a result, the congestion occurs in some satellites, while others are not used at all. The problem about traffic engineering in satellite networks can be solved by scattering traffic over underutilized links. Therefore, this paper proposes a traffic congestion avoidance scheme using Traffic Detour Technique (TDT) which is based on traffic information about a satellite of next hop on the remainder of the path to the destination. The satellite where traffic was concentrated transmits a signaling packet to its neighboring satellites to decrease their sending rate before congestion occurs or packets drop. Neighboring satellites follow it and look for alternate paths of the others which do not include the satellite where a problem occurred. The performance of the proposed scheme is evaluated by simulations. And from the results, this scheme achieves a better traffic distribution and decreases the number of packet drops.

Estimation accuracy of pathogen density distribution in water based on a left-censored dataset: Bayesian vs maximum a posteriori

Tsuyoshi Kato,Makoto Hasegawa,Satoshi Okabe,Daisuke Sano 대한환경공학회 2015 대한환경공학회 학술발표논문집 Vol.2015 No.10