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Mixing of magmatic CO2 into volcano groundwater flow at Aso volcano assessed combining carbon and water stable isotopes

Makoto Yamada, Shinji Ohsawa, Kohei Kazahaya, Masaya Yasuhara, Hiroshi Takahashi, Kazuhiro Amita, Hideo Mawatari, Shin Yoshikawa
2011 Journal of Geochemical Exploration  
This applies especially in the Aso-dani area, where deeper groundwater correlates with higher recharge.  ...  To understand deep groundwater flow systems and their interaction with CO 2 emanated from magma at depth in a volcanic edifice, deep groundwater samples were collected from hot spring wells in the Aso  ...  at the Aso-dani area.  ... 
doi:10.1016/j.gexplo.2010.10.007 fatcat:wgadspzw5zhxriudm6arbcjvpy

胆道閉鎖症に合併したビタミン K 欠乏症
Hemorrhagic Disease of the Infant Accompanied with Biliary Atresia

Kohei Hashizume, Toshio Nakajo, Haruko Naito, Tatsuo Naito, Seijiro Aso, Koichi Aso, Tosei Omiya, Kiwamu Kawamorita
1980 Journal of the Japanese Society of Pediatric Surgeons  
doi:10.11164/jjsps.16.4_561 fatcat:iygz477uybglxh4rgfdblct5o4

Shape-dependent local strain in gold nanorods: data-driven atomic-resolution electron microscopy analysis [article]

Kohei Aso, Jens Maebe, Xuan Quy Tran, Tomokazu Yamamoto, Yoshifumi Oshima, Syo Matsumura
2020 arXiv   pre-print
AUTHOR INFORMATION Corresponding Author *E-mail: Orchid Kohei Aso: 0000-0001-6935-7655 Figure 1a - 1a c show atomically resolved HAADF images for three single-crystalline gold nanoparticles  ... 
arXiv:2011.03191v1 fatcat:zrelzyltyre2tdghtmck6afxbu

Lattice Tetragonality and Local Strain Depending on Shape of Gold Nanoparticles

Kohei Aso, Jens Maebe, Tomokazu Yamamoto, Syo Matsumura
2019 Microscopy and Microanalysis  
doi:10.1017/s1431927619011346 fatcat:bffzrvjhnfg43iglawdxjifqdu

Atomic-scale observation of ordered structure induced by surface segregation in annealed Pt@Co core-shell nanoparticles [article]

Kohei Aso, Hirokazu Kobayashi, Shotaro Yoshimaru, Miho Yamauchi, Syo Matsumura, Yoshifumi Oshima
2021 arXiv   pre-print
The ordered structure of binary alloy nanoparticles determines their magnetic and catalytic characteristics. In the alloys after annealing, one of the components preferentially segregates on the surface to reduce surface energy. This surface segregation has been known as a factor in the construction of an ordered phase near the surface. However, the segregation-induced ordering has not been observed for nanoparticles. Here, platinum@cobalt (Pt@Co) core-shell nanoparticles were synthesized, and
more » ... heir structural changes after annealing at 600C, 700C, and 800C for 3 hours were observed by a scanning transmission electron microscope. We discovered an L10-PtCo structure near the surface at 700C, which was unexpected given the initial Pt:Co ratio of about 4:1. The L10-PtCo structure was considered to form due to surface segregation of Pt atoms and diffusion insufficient to mix Pt and Co atoms in the particle overall because the structure did not form at 600C and 800C.
arXiv:2111.00883v1 fatcat:btezu4hptjbs5mhxs3covhptdy


2006 Doboku Gakkai Ronbunshuu A  
doi:10.2208/jsceja.62.243 fatcat:id4ki67nanb4ldr7a7s4m6w3lq

Transaction Linkage of the Basic Manufacturing Sector of Machinery Industry in Ota city, Southern Tokyo district:

Kohei ASO
2016 Annals of the Association of Economic Geographers  
ASO Kohei The southern part of Tokyo district includes Ota city is famous for its dens agglomeration of industrial SMEs.  ... 
doi:10.20592/jaeg.62.3_229 fatcat:jogstqd36veypgllqeeecvkfnm

A Capture-Safety Checking Metric Based on Transition-Time-Relation for At-Speed Scan Testing

Kohei MIYASE, Ryota SAKAI, Xiaoqing WEN, Masao ASO, Hiroshi FURUKAWA, Yuta YAMATO, Seiji KAJIHARA
2013 IEICE transactions on information and systems  
Test power has become a critical issue, especially for lowpower devices with deeply optimized functional power profiles. Particularly, excessive capture power in at-speed scan testing may cause timing failures that result in test-induced yield loss. This has made capturesafety checking mandatory for test vectors. However, previous capturesafety checking metrics suffer from inadequate accuracy since they ignore the time relations among different transitions caused by a test vector in a circuit.
more » ... his paper presents a novel metric called the Transition-Time-Relation-based (TTR) metric which takes transition time relations into consideration in capture-safety checking. Detailed analysis done on an industrial circuit has demonstrated the advantages of the TTR metric. Capturesafety checking with the TTR metric greatly improves the accuracy of test vector sign-off and low-capture-power test generation.
doi:10.1587/transinf.e96.d.2003 fatcat:pwwr2rd4sba43k35ppb5jqi7gy

Insulinoma in a Patient with Chronic Renal Failure due to Type 2 Diabetes Mellitus Treated Effectively with Diazoxide

Masanori Shimizu, Kunihiro Suzuki, Kohei Tsuchida, Masaru Kojima, Hideyuki Hiraishi, Yoshimasa Aso
2015 Internal medicine (Tokyo. 1992)  
A 63-year-old man was diagnosed with diabetes mellitus at 42 years of age. He subsequently exhibited poor blood glucose control for a prolonged period, and his renal failure worsened. He therefore underwent hemodialysis and abdominal magnetic resonance imaging, which revealed a mass in the pancreatic tail. The immunoreactive insulin and C-peptide immunoreactivity levels were significantly elevated, and the results of a fasting test led to a diagnosis of insulinoma. The patient received
more » ... with oral diazoxide and continuous glucose monitoring (CGM), which resulted in the resolution of the hypoglycemia. This is a rare case of renal failure in which the CGM findings showed improvements in the blood glucose level after diazoxide administration.
doi:10.2169/internalmedicine.54.3621 pmid:25786453 fatcat:l5nypmbelrhpdhc3in2p735lsu

Pharmacokinetics and Safety After a Single Dose of Imarikiren in Subjects with Renal or Hepatic Impairment

Yukio Shimasaki, Masashi Sakaki, Minoru Itou, Tokurou Kobayashi, Masako Aso, Tomoya Kagawa, Takuya Saiki, Kumi Matsuno, Yuhei Sano, Kohei Shimizu, Shingo Kuroda, Emiko Koumura
2018 Clinical drug investigation  
Yukio Shimasaki, Masashi Sakaki, Minoru Itou, Tokurou Kobayashi, Masako Aso, Tomoya Kagawa, Takuya Saiki, Kumi Matsuno, Yuhei Sano, Kohei Shimizu, Shingo Kuroda, and Emiko Koumura report that medical writing  ... 
doi:10.1007/s40261-018-0695-4 pmid:30194585 fatcat:r5rvte6a3fdgjc2cwcjmjhaem4

A novel capture-safety checking method for multi-clock designs and accuracy evaluation with delay capture circuits

Kohei Miyase, Masao Aso, Ryou Ootsuka, Xiaoqing Wen, Hiroshi Furukawa, Yuta Yamato, Kazunari Enokimoto, Seiji Kajihara
2012 2012 IEEE 30th VLSI Test Symposium (VTS)  
Excessive capture power in at-speed scan testing may cause yield loss due to timing failures. Although reducing the number of clock domains that capture test responses simultaneously is a practical and scalable solution for reducing capture power, no available capturesafety checking metric can assess its effect in an accurateenough manner, especially when multiple clock domains capture test responses in a short period of time. This paper proposes a novel CLEAR (CLock-Edge-Arrival-Relationbased)
more » ... capture-safety checking method that, for the first time, takes clock edge arrival times for different clock domains into consideration. The accuracy and usefulness of the proposed method have been clearly demonstrated by simulation-based evaluation with the largest ITC'99 benchmark circuit as well as real-chip-based evaluation with an industrial chip embedded with on-chip delay measurement circuitry.
doi:10.1109/vts.2012.6231102 dblp:conf/vts/MiyaseAOWFYEK12 fatcat:vyzlexbg7bekpeb2qzjv6cr6qm


Kohei HARA, Minoru HIGA, Toru NISHIKAWA, Yasukuni TSUJI, Hiroyuki ASO
1964 Nihon Naika Gakkai Zasshi  
doi:10.2169/naika.53.567 fatcat:xz263zm63bayxo2ellorilslh4

An unusual variant of the common trunk of the fronto-orbital and frontopolar arteries associated with a ruptured aneurysm of the A1 segment of the anterior cerebral artery

Hiroshi Kashimura, Kenta Aso, Masaru Takeda, Kohei Chida
2015 Surgical neurology international  
The common trunk of the fronto-orbital artery (FOA) and frontopolar artery (FPA) arising from the A1 segment of the anterior cerebral artery (ACA) associated with a ruptured aneurysm (AN), is rare. Case Description: The patient was a 52-year-old man who suffered from subarachnoid hemorrhage. Three-dimensional computed tomography angiography revealed an elongated and tortuous left A1 segment of the ACA and a saccular AN arising from the left A1 segment of the ACA at the origin of the cortical
more » ... nch, defining its location just on the midline and behind the anterior communicating artery. This vessel had two branches. One branch ran along the inferior surface of the ipsilateral frontal lobe, and the other branch ran anteriorly and medially along the surface of the left hemisphere toward the frontal pole. The anomalous artery was interpreted as a common trunk of the FOA and FPA. Bifrontal craniotomy was performed. The anomalous artery arose from the A1 segment of the ACA at the origin of the AN, and the recurrent artery of Heubner branched off the anomalous artery. The AN was successfully obliterated, clipping with a bayonet-shaped Yasargil titanium clip. Complete AN occlusion and patency of both the A1 and the common trunk of the FOA and FPA, were confirmed intraoperatively by indocyanine green angiography. Conclusions: Recognizing this variant preoperatively, could be helpful in preventing the complications of surgery. An unusual variant of the common trunk of the fronto-orbital and frontopolar arteries associated with a ruptured aneurysm of the A1 segment of the anterior cerebral artery
doi:10.4103/2152-7806.166178 pmid:26539313 pmcid:PMC4597292 fatcat:ha276nd2cngm7jqbkphz5ljt2i

B-Mode Ultrasonography versus Contrast-Enhanced Ultrasonography for Surveillance of Hepatocellular Carcinoma: A Prospective Multicenter Randomized Controlled Trial

Masatoshi Kudo, Kazuomi Ueshima, Yukio Osaki, Masashi Hirooka, Yasuharu Imai, Kazunobu Aso, Kazushi Numata, Masayuki Kitano, Takashi Kumada, Namiki Izumi, Yasukiyo Sumino, Chikara Ogawa (+1 others)
2019 Liver Cancer  
Current practice guidelines recommend the use of ultrasound (US) as an initial surveillance tool for hepatocellular carcinoma (HCC) in patients with liver cirrhosis. Patients with liver cirrhosis, however, frequently have coarse liver parenchyma, masking the presence of tiny nodules during B-mode US. Contrast-enhanced US (CEUS) with Sonazoid has a long-lasting, stable Kupffer phase, which makes it possible to scan the entire liver to depict small lesions. In addition, defect reperfusion imaging
more » ... (reinjection imaging) enables to determine whether the detected nodule is HCC or not. This prospective, multicenter, randomized, controlled trial was conducted to demonstrate the usefulness of Kupffer phase surveillance in the detection of small HCC compared to B-mode US. A total of 23 institutions joined this study. In total, 656 patients with hepatitis B- or C-related liver cirrhosis were randomized either to the B-mode US surveillance group (n = 313) or the Kupffer phase CEUS with Sonazoid surveillance group (n = 309). The primary endpoint was the maximum size of HCC at the time of the first detection. Secondary endpoints included time to HCC detection, number of tumors, and Barcelona Clinic Liver Cancer stage at the first detection, and sensitivity, specificity, and accuracy of each method in the diagnosis, and the cumulative detection rate of HCC. The mean HCC size at the first detection was significantly smaller in the CEUS (13.0 ± 4.1 mm; n = 28) than in the B-mode US group (16.7 ± 4.1 mm; n = 26) (p = 0.011). Of the 38 patients with HCV cirrhosis diagnosed with HCC by US alone, mean tumor size at the first detection was significantly smaller in the 20 patients diagnosed by CEUS alone than in the 18 diagnosed by B-mode US alone (12.7 ± 3.1 vs. 17.6 ± 7.0 mm, p = 0.012). In contrast, among the 16 patients with HBV cirrhosis diagnosed by US alone, mean tumor size at the first detection was similar in the 8 patients diagnosed by CEUS alone and the 8 diagnosed by B-mode US (13.6 ± 6.0 vs. 14.5 ± 2.7 mm, p = 0.715). Kupffer phase CEUS surveillance with Sonazoid is extremely useful for the early detection and confirmation of HCC using a reinjection technique. Kupffer phase CEUS with Sonazoid contrast combined with the reinjection technique is, therefore, recommended as first-line screening tool for HCC in patients with liver cirrhosis, especially those with very coarse liver parenchyma.
doi:10.1159/000501082 pmid:31602370 pmcid:PMC6738204 fatcat:tdxlb5kaijatlfyqihmpodnwle

Spin-Wave Spectrum in "Single-Domain" Magnetic Ground State of Triangular Lattice Antiferromagnet CuFeO2

Taro Nakajima, Setsuo Mitsuda, Tendai Haku, Kohei Shibata, Keisuke Yoshitomi, Yukio Noda, Naofumi Aso, Yoshiya Uwatoko, Noriki Terada
2011 Journal of the Physical Society of Japan  
The sample was set in a uniaxial pressure cell developed by Aso et al. 19) We applied, at room temperature, 10 MPa of uniaxial pressure on the sample.  ... 
doi:10.1143/jpsj.80.014714 fatcat:bhmvk5rfhzacdbdu4kcato3lye
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