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Uncertainty for the Realization of the Co-C Eutectic Point for Calibration of Thermocouples
Hideki Ogura1,Masaya Izuchi,Jun Tamba,Masaru Arai 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The Co-C cells to realize the metal-carbon eutectic points were constructed, and the uncertainty of the Co-C eutectic point was evaluated using Pt/Pd thermocouples. The uncertainty of Pt/Pd thermocouple calibration at the Co-C eutectic point was estimated to be 0.53 K (k=2), including the uncertainty of the measuring system and the drift of thermocouple. This result shows the appropriateness of the device for calibrating thermocouples.
Shin-ichiro Ogura,Shigefumi Tanaka,Shin Matsumoto,Kunihiro Abe,Toshio Shimizu,Yoshihiro Takahashi,Hiroshi Yoshida 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08
Our previous study conducted in a wasted mulberry plantation showed significant decline of leaf productivity of mulberry (Morns sp.) by cattle grazing in three years (Ogura et al., 2009). This means t㏊t improvement of understory vegetation is essential to use such wasted areas as grazing lands. In this study, the mixture of seeds (Dactylis glomerata, Lolium perenne, Poa pratensis and Trifolium repens, 15:15:5:2) was seeded on 18 Sep. 2007, in nine experimental plots (6 m × 6 m each) with different seeding rates (L: 37 ㎏/㏊, M: 56㎏/㏊ and H: 74㎏/㏊, three replications) in the wasted mulberry plantation described in the previous paper (paddock A) (Ogura et al., 2009). Two cows were grazed in the paddock for 42 and 54 days in 2007 and 2008, respectively. No fertilizer nor herbicides were applied in the paddock. The coverage of the sown species and weeds, and the proportion of bare area were recorded on 19 Sep. 2007, 16 Nov. 2007, 21 May 2008 and 21 May 2009. T. repens rapidly covered the understory; the coverage ranged 49.4-71.7% in 2008-2009 (Fig. 1). D. glomerata and L. perenne also increased to 10.6-18.3% and 20.6-33.9% in 2009, respectively, regardless to the seeding rates. In contrast, the proportion of bare area rapidly decreased. The quick establishment of the sown plants probably due t㏊t defoliation and trampling of cows suppressed the growth of native plants. In conclusion, the seeding rate of 3.7 ㎏/㏊ is sufficient to establish herbage plants in wasted mulberry plantations under cattle grazing.
Productivity and Quality of Mulberry Leaves under Cattle Grazing in a Wasted Mulberry Plantation
Shin-ichiro Ogura,Shusuke Sato,Shigefumi Tanaka,Shin Matsumoto,Kunihiro Abe,Toshio Shimizu,Yoshihiro Takahashi,Hiroshi Yoshida 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08
Mulberry (Morus sp.) plantations have been deteriorating in Japan due to decline of silk industry. In mountainous areas, large part of the mulberry plantations has been wasted. Cattle grazing in the wasted mulberry plantations is a practical system to reuse the wasted areas for food production, because mulberry leaves are highly nutritive (Ezenwa and Kitahara, 2001), productive (Kitahara et al., 2002) and palatable to cattle (Ogura et al., 2008). In this study, the productivity and quality of mulberry leaves were investigated for 3 years in a wasted mulberry plantation grazed with beef cows, in Minamisanriku town, Miyagi, Japan. Cattle grazing started in September 2005 (paddock A, 44 a) and June 2006 (paddock B, 96 a). For each paddock, two pregnant cows were grazed from June to August-October in 2006-2008. In the paddocks A and B, four mulberry trees were chosen and the leaf mass and chemical composition were measured in mid-June and late August (pre-grazing leaf mass) during 2006-2008. A non-grazed paddock was also measured in 2007-2008. Leaf productivity of mulberry trees significantly decreased with cattle grazing; pre-grazing leaf mass changed from 246.8 g to 10.4 g DM/tree and 286.2 g to 17.6 g DM/tree in the paddock A and B, respectively (Fig 1). In contrast, 149.2-365.1 g DM/tree of leaves was produced in the non-grazed paddock. Chemical composition was stable during the three years in all paddocks. It is concluded that cattle grazing gives severe damage to leaf production of mulberry trees in three years.
Ogura, Ichiro,Kobayashi, Eizaburo,Nakahara, Ken,Haga-Tsujimura, Maiko,Igarashi, Kensuke,Katsumata, Akitoshi Korean Academy of Oral and Maxillofacial Radiology 2019 Imaging Science in Dentistry Vol.49 No.4
Purpose: The purpose of this study was to evaluate the morphology of the mandibular cortex in cases of medication-related osteonecrosis of the jaw (MRONJ) in patients with osteoporosis or bone metastases using a computer programme. Materials and Methods: Fifty-four patients with MRONJ (35 with osteoporosis and 19 with bone metastases) were examined using panoramic radiography. The morphology of the mandibular cortex was evaluated using a computer programme that scanned the mandibular inferior cortex and automatically assessed the mandibular cortical index (MCI) according to the thickness and roughness of the mandibular cortex, as follows: normal (class 1), mildly to moderately eroded (class 2), or severely eroded (class 3). The MCI classifications of MRONJ patients with osteoporosis or bone metastases were evaluated with the Pearson chi-square test. In these analyses, a 5% significance level was used. Results: The MCI of MRONJ patients with osteoporosis(class 1: 6, class 2: 15, class 3: 14) tended to be higher than that of patients with bone metastases(class 1: 14, class 2: 5, class 3: 0)(P=0.000). Conclusion: The use of a computer programme to assess mandibular cortex morphology may be an effective technique for the objective and quantitative evaluation of the MCI in MRONJ patients with osteoporosis or bone metastases.
Ogura, Koki,Chandhaket, Srawouth,Nakaoka, Mutsuo,Terai, Haruo,Sumiyoshi, Shinichiro,Kitaizumi, Takeshi,Omori, Hideki The Korean Institute of Power Electronics 2002 JOURNAL OF POWER ELECTRONICS Vol.2 No.3
The utility interfaced sinewave modulation Inverter for the solar photovoltaic power conditioner with a high frequency transformer is presented for residential applications. As compared with the conventional full-bridge hard switching slnewave PWM inverter with a high frequency link, the simplest single-ended edge-resonant soft switching sinewave inverter with a sinewave duty cycle pulse control scheme is implemented, resulting in size and weight reduction, low cost and high efficiency This paper presents a prototype system of the sinewave zero voltage soft switching sinewave inverter for solar power conditioner, along with its operating principle and unique features. In addition to these, this paper discusses a control implementation to deliver high quality output current. Major design of each component and the power loss analysis under actual power processing is also discussed and evaluated from an experimental point of view A newly developed utility-connected sinewave power conditioning circuit which achieves 92.5% efficiency under 4kW output is demonstrated.
Ogura, S.,Kosako, T.,Hayashi, Y.,Dohi, H. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.1
Ruminal degradation characteristics of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP) in fresh leaves of two Japanese native grasses (Zoysia japonica and Miscanthus sinensis) and one sown temperate grass (Dactylis glomerata) were investigated by an in sacco method in spring (mid-May), summer (mid-July) and autumn (mid-September). Japanese native grasses had higher NDF and lower CP concentrations than D. glomerata, and the CP concentration in native grasses decreased in autumn. Ruminal degradability of DM, NDF and CP was lower in native grasses than in D. glomerata (p<0.05) in all seasons. DM and NDF degradability decreased in summer for Z. japonica and D. glomerata, while it decreased in autumn for M. sinensis. CP degradability in Z. japonica was constant throughout the seasons, whereas that in M. sinensis greatly decreased in summer and autumn (p<0.05). It was concluded that Z. japonica could stably supply ruminally digestible nutrients for grazing animals in Japanese native pasture. However, the degradation characteristics of freshly chopped native grasses did not fit the exponential model of $D=a+b(1-e^{-ct})$ proposed by Ørskov and McDonald.
Ogura, Ichiro,Sasaki, Yoshihiko,Sue, Mikiko,Oda, Takaaki,Kameta, Ayako,Hayama, Kazuhide Korean Academy of Oral and Maxillofacial Radiology 2019 Imaging Science in Dentistry Vol.49 No.1
Purpose: To present characteristic findings of Tc-99m hydroxymethylene diphosphonate (HMDP) scintigraphy, computed tomography (CT), and magnetic resonance (MR) imaging for osteonecrosis in the mandible, especially osteoradionecrosis(ORN) and medication-related osteonecrosis of the jaw(MRONJ). Materials and Methods: Thirteen patients with MRONJ and 7 patients with ORN in the mandible underwent Tc-99m HMDP scintigraphy, CT, and MR imaging (T1-weighted images[T1WI], T2-weighted images[T2WI], short inversion time inversion recovery images[STIR]), diffusion-weighted images[DWI], and apparent diffusion coefficient [ADC] mapping). The associations of scintigraphy, CT, and MR imaging findings with MRONJ and ORN were analyzed using the chi-square test with the Pearson exact test. Results: Thirteen patients with MRONJ and 7 patients with ORN in the mandible showed low signal intensity on T1WI and ADC mapping, high signal intensity on STIR and DWI, and increased uptake on scintigraphy. Periosteal bone proliferation on CT was observed in 69.2% of patients with MRONJ(9 of 13) versus 14.3% of patients with ORN(1 of 7)(P=0.019). Conclusion: This study presented characteristic imaging findings of MRONJ and ORN on scintigraphy, CT, and MR imaging. Our results suggest that CT can be effective for detecting MRONJ and ORN.
Ogura, Ichiro,Sasaki, Yoshihiko,Sue, Mikiko,Oda, Takaaki Korean Academy of Oral and Maxillofacial Radiology 2018 Imaging Science in Dentistry Vol.48 No.1
Purpose: The aim of this study was to evaluate the quantitative strain elastography of tongue carcinoma using intraoral ultrasonography. Materials and Methods: Two patients with squamous cell carcinoma (SCC) who underwent quantitative strain elastography for the diagnosis of tongue lesions using intraoral ultrasonography were included in this prospective study. Strain elastography was performed using a linear 14 MHz transducer (Aplio 300; Canon Medical Systems, Otawara, Japan). Manual light compression and decompression of the tongue by the transducer was performed to achieve optimal and consistent color coding. The variation in tissue strain over time caused by the compression exerted using the probe was displayed as a strain graph. The integrated strain elastography software allowed the operator to place circular regions of interest (ROIs) of various diameters within the elastography window, and automatically displayed quantitative strain (%) for each ROI. Quantitative indices of the strain (%) were measured for normal tissues and lesions in the tongue. Results: The average strain of normal tissue and tongue SCC in a 50-year-old man was 1.468% and 0.000%, respectively. The average strain of normal tissue and tongue SCC in a 59-year-old man was 1.007% and 0.000%, respectively. Conclusion: We investigated the quantitative strain elastography of tongue carcinoma using intraoral ultrasonography. Strain elastography using intraoral ultrasonography is a promising technique for characterizing and differentiating normal tissues and SCC in the tongue.
Ogura, Koki,Chandhaket, Srawouth,Ahmed, Tarek,Nakaoka, Mutsuo The Korean Institute of Power Electronics 2004 JOURNAL OF POWER ELECTRONICS Vol.4 No.1
This paper presents a high-frequency ZVS-PWM boost chopper-fed DC-DC converter with a single active auxiliary edge resonant snubber in the load-side which can be designed for power conditioners such as solar photovoltaic generation, fuel cell generation, battery and super capacitor energy storages. Its principle operation in steady-state is described in addition to a prototype setup. The experimental results of ZVS-PWM boost chopper-fed DC-DC converter proposed here, are evaluated and verified with a practical design model in terms of its switching voltage and current waveforms, the switching v-i trajectory, the temperature performance of IGBT module, the actual power conversion efficiency and the EMI of radiated and conducted emissions. And then discussed and compared with the hard switching scheme from an experimental point of view. Finally, this paper proposes a practical method to suppress parasitic oscillation due to the active auxiliary resonant switch at ZCS turn off mode transition with the aid of an additional lossless clamping diode loop, and reduced the EMI conducted emission in this paper.