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T. Sanami,M. Hagiwara,H. Iwase,M. Takada,D. Satoh,Y. Iwamoto,S. Kunieda,H. Yashima,A. Tamii,M. Baba 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The experimental program to measure double differential cross section (DDX) data for fragment production is launched to establish reaction models and parameters for proton induced reaction on light-medium nuclei for the energy range from threshold to a few hundred MeV. In this program, a Bragg Curve Counter (BCC) that is improved to cover entire energy range of fragment is employed as a detector. DDXs of lithium, beryllium, boron and carbon emission at 30, 60, 90, and 135 degree were measured for 40, 50, 70, and 80 MeV proton on carbon, nitrogen, oxygen and aluminium Theoretical calculation results using three different intra-nuclear cascade models were compared with experimental data. By choosing appropriate model, the calculation generally reproduces the DDXs except for fragments having relatively high energy and small emission angle, and fragments from two body reaction.
M. Hagiwara,T. Sanami,K. Masumoto,Y. Iwamoto,N. Matsuda,Y. Sakamoto,Y. Nakane,H. Nakashima,Y. Uwamino 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Nuclear data on proton-induced neutron and γ-ray production in the energy range from 10 to 20 MeV is important to estimate the shield design and activation of low-energy cyclotron facilities for medical use such as production of radiopharmaceuticals in positron emission tomography (PET). We have measured double-differential thick target yields (TTYs) of neutrons and γ-rays from a ^(18)O-enriched water (H^(18)_2O) target induced by 18 MeV protons in order to estimate leakage radiations from a cyclotron and the neutron-induced activation in the production process of the ^(18)F-tagged fluorodeoxyglucose (FDG) which is a common radiopharmaceuticals for PET. Neutrons and γ-rays were measured with 5.08 cm diameter × 5.08 cm long NE213 scintillators for eight laboratory angles between 15- and 150-degrees. After applying a neutron-γ-ray event separation using the pulse-shape-discrimination (PSD) technique the neutron and γ-ray events were analyzed by a time-of-flight (TOF) technique and an unfolding technique, respectively. The measured TTYs were compared with TENDL-2009 data library and the physical model calculations with MCNPX and PHITS. The calculated TTYs roughly agree with the measured data.
Hirata, M.,Iwamoto, T.,Otozu, W.,Kiyota, D. Asian Australasian Association of Animal Productio 2002 Animal Bioscience Vol.15 No.5
The effects of recording interval (1, 2, 3, 4, 5, 10, 15, 20 and 30 min) on the estimation of some grazing behavior variables in beef cows and calves (<4 months old) were investigated in a daytime grazing (7 h) system utilizing a bahiagrass (Paspalum notatum Flugge) pasture (a 1.1 ha paddock and a 0.4 ha resting area). Recording intervals of 10-30 min tended to underestimate the time spent grazing and ruminating and overestimate the time spent resting by animals, whereas intervals of 1-5 min resulted in almost constant estimates. In all grazing activities, the errors of estimation became larger when the recording interval exceeded 5 min. The accuracy of estimation was higher for grazing time>rumination time>resting time. An increase in recording interval always decreased estimates of the distance walked by animals. It was concluded that recording intervals of 1-5 min provide reliable estimates of the time spent grazing, ruminating and resting. It was also concluded that positioning of animals at 1 min intervals may provide estimates of walking distance with acceptable bias toward underestimation.
Effects of insulin glulisine as mono- or add-on therapy in patients with type 2 diabetes mellitus
Kawamori, R.,Iwamoto, Y.,Kadowaki, T.,Iwasaki, M.,Kim, S.-W.,Woo, J.-T.,Baik, S.-H.,Yoon, K.-H. Blackwell Publishing Ltd 2009 DIABETES OBESITY AND METABOLISM Vol.11 No.9
<P>Aim</P><P>To evaluate the safety and efficacy of insulin glulisine (glulisine) with and without oral antidiabetic drugs (OAD; sulphonylurea or sulphonylurea + biguanide) relative to that of OAD alone in Japanese and Korean patients with inadequately controlled type 2 diabetes mellitus (T2DM).</P><P>Methods</P><P>In an open, randomized, parallel-group, comparative, controlled trial, 387 patients were randomized and treated with glulisine + OAD (n = 130), glulisine monotherapy (n = 127) or OAD only (n = 130) for 16 weeks. Glulisine was self-injected subcutaneously three times daily (0–15 minutes before meals) at a starting dose of ≥0.2 U/kg/day. Patients titrated the glulisine dose to achieve a 2-h postprandial plasma glucose (2h-PPG) level of 7.1–9.5 mmol/l (128–172 mg/dl) by administering at least one additional unit at each appropriate meal time if the 2h-PPG level was > 9.5 and < 11.1 mmol/l (> 172 and < 200 mg/dl) and by administering at least two additional units if the 2h-PPG level was ≥ 11.1 mmol/l (≥ 200 mg/dl). Therapy with OAD was continued at the stable baseline regimen. The primary efficacy endpoint was change in haemoglobin A<SUB>1c</SUB> (HbA<SUB>1c</SUB>) from baseline to endpoint in the intention-to-treat population.</P><P>Results</P><P>At baseline, therapy with OAD was a sulphonylurea only and a sulphonylurea + a biguanide in approximately 24 and 76% of patients respectively. Both glulisine groups had larger reductions in adjusted mean HbA<SUB>1c</SUB> than the OAD-only group (glulisine + OAD, −2.07%; glulisine monotherapy, −1.25%; OAD only, −0.61%). Superiority of glulisine + OAD and glulisine monotherapy vs. OAD only was shown by differences in adjusted mean HbA<SUB>1c</SUB> change from baseline values of −1.46% (p < 0.0001) and −0.64% (p < 0.0001) respectively. Both glulisine groups had better 2h-PPG control than the OAD-only group. Mean daily glulisine doses increased from baseline to endpoint (glulisine + OAD, 13.3–22.5 U; glulisine monotherapy, 14.2–38.0 U). The rate of all symptomatic hypoglycaemia events per patient-year in the entire treatment phase was 11.9 in the glulisine + OAD group, 8.8 in the glulisine monotherapy group and 1.7 in the OAD-only group. There was only one event of severe hypoglycaemia, which occurred in the glulisine + OAD group. Efficacy and safety were similar in Japanese and Korean subpopulations.</P><P>Conclusions</P><P>Both glulisine + OAD and glulisine monotherapy were well tolerated and effective for Japanese and Korean patients with T2DM mellitus inadequately controlled by OAD therapy alone.</P>
A. Mzhavia,M. Ueyama,Y. Uozumi,Y. Sawada,M. Yoshioka,G. Wakabayashi,H. Iwamoto,Y. Koba,Z. Tsamalaidze,P. Evtukhovitch,V. Kalinnikov,N. Khomutov,N. Kuchinskii,G. Macharashvili,A. Moiseenko,A. Molokanov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Double-differential cross section (DDX) data of nucleon-actinide reactions is crucial for the study of nuclear waste transmutation by accelerator driven systems. Charged particle emission data is strongly required as well as the neutron data up to several Gev. In the present study, we measured double-differential cross sections of light charged particle productions for proton induced reactions on ^(232)Th at 360 Mev. The experiment was carried out at the PHASOTRON facility of the Joint Institute for Nuclear Research (JINR) in Dubna.The light charged particles (LCPs) emitted from nuclear reactions were detected by ΔE-E counter telescopes. Eight detector systems were used. Four of them were comprised of two plastic scintillator plates and BGO crystal. The other four consisted of two silicon semiconductor detectors and two scintillation counters, a cubic CsI(TI) (40 mm long) crystal and plate plastic scintillator. The four identical detectors on each side were placed at laboratory angles of 20˚. 40˚, 70˚ and 105˚ with respect to the beam axis. Resultant DDX spectra of protons and deuterons were compared with intranuclear cascade (INC) model.
Lim, E.,Iwamoto, M. Elsevier 2016 Current Applied Physics Vol.16 No.10
<P>By using the time-resolved electric field induced optical second harmonic generation (TR-EFISHG) measurement system, we studied the current-voltage (I-V) and capacitance-voltage (C-V) characteristics of metal-insulator-organic semiconductor diodes with a structure of indium tin oxide/Polyimide(PI)/6,13-Bis(triisopropylsilylethynyl)-pentacene(TIPS-pentacene)/Au. The TR-EFISHG directly probed the electric field across the TIPS-pentacene layer, and showed evidence of the charge accumulation at the TIPS-pentacene/PI interface region. Results of TR-EFISHG coupled with the I-V and C-V electrical measurements clearly demonstrated the rectifying properties and the threshold voltage shift of the diodes, before and after stress biasing. The results showed that the TR-EFISHG measurement coupled with the I-V and C-V measurements is a very useful way to analyze carrier behaviors and trapping charges of organic semiconductor diodes, even when the electrical property of the organic semiconductor layer is unknown. (C) 2016 Elsevier B.V. All rights reserved.</P>
Lim, E.,Taguchi, D.,Iwamoto, M. Elsevier Science 2013 Organic electronics Vol.14 No.7
By using time-resolved electric field induced optical second harmonic generation (TR-EFISHG) measurement, we studied the rectifying property of organic double-layer diodes with a structure of indium-tin-oxide/polyimide/6,13-Bis(triisopropylsilylethynyl)-pentacene/gold (ITO/PI/TIPS-pentacene/Au). Upon application of a step voltage to the diodes, the TR-EFISHG probed the electric field changes induced in the TIPS-pentacene layer by hole injection from the ITO electrode, followed by the hole accumulation at the PI/TIPS-pentacene interface. Consequently, the electric field distributions in the diodes before and after the carrier injection were traced with accumulated charges at the PI/TIPS-pentacene interface, depending on the DC biasing applied to the diodes. Analyzing the carrier behavior in ITO/PI/TIPS-pentacene/Au on the basis of a Maxwell-Wagner model, we discussed the rectifying property of the diodes in terms of DC biasing effect, i.e., threshold-voltage shift, and concluded that space charge limited current process that flows across the PI layer governs the rectification of the diodes. Using the TR-EFISHG measurement is an effective way to study the rectifying property of organic double-layer diodes.
Lim, E.,Taguchi, D.,Iwamoto, M. Elsevier Science 2014 ORGANIC ELECTRONICS Vol.15 No.12
To clarify the capacitance-voltage (C-V) characteristics of organic double-layer diodes with a structure of ITO/PI/TIPS-pentacene/Au, time-resolved electric field induced optical second harmonic generation (TR-EFISHG) measurement was employed. The TR-EFISHG measurement probed the change of electric fields in the TIPS-pentacene organic layer, which originates from accumulated charges at the PI/TIPS-pentacene double-layer interface. Consequently, the shift of threshold voltage ΔV<SUB>th</SUB> of the C-V curves caused by stress negative-biasing was well explained, and a potential well model was proposed on the basis of the TR-EFISHG measurement. TR-EFISHG is a very useful way to study the carrier behaviors, in terms of the C-V characteristics.