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Hypernova Nucleosynthesis and Early Chemical Evolution [article]

Ken'ichi Nomoto, Keiichi Maeda, Hideyuki Umeda
2001 arXiv   pre-print
Maeda et al. (2002) have examined the effect of aspherical (jet-like) explosions on nucleosynthesis in hypernovae.  ...  Right: The profiles of the Fe-blend (left panels) and of O I] 6300, 6363Å (right panels) viewed at 15 • from the jet direction (Maeda et al. 2002).  ... 
arXiv:astro-ph/0110528v1 fatcat:w5z2ucebpncrbgyjwfiqzk7ogq

Hypernovae and their Nucleosynthesis [article]

Ken'ichi Nomoto, Keiichi Maeda, Hideyuki Umeda, Takuya Ohkubo, Jingsong Deng, Paolo Mazzali
2002 arXiv   pre-print
Maeda et al. (2002) calculated the nucleosynthesis in aspherical explosions.  ... 
arXiv:astro-ph/0209064v1 fatcat:utcwylg6d5fmtlaiwr6fj55p6u

Analyzing cannabinoid-induced abnormal behavior in a zebrafish model [article]

Akihiro Hasumi, Hideyuki Maeda, Ken-ichi Yoshida
2020 bioRxiv   pre-print
This study investigated the locomotor activity and responses under stressful conditions to assess marijuana-induced abnormal behavior in zebrafish larvae ( Danio rerio ), as an alternative to the standard rodent model . To induce the desired symptoms, cannabidiol and WIN55,212-2, two chemical components derived from marijuana plants, were used. A repeated light and dark test was used to assess how drug exposure influenced locomotive responses. Subjects were examined after moderate cannabidiol
more » ... d WIN55,212-2 exposure and 24 h after relocation into untreated water . Cannabidiol did not produce a dose-dependent inhibitory effect on locomotor activity; 0.5 and 10 µg/mL cannabidiol decreased total distance and velocity, and 10 µg/mL cannabidiol attenuated responses in the darkness. No differences between the control and cannabidiol-treated groups were apparent after 24 h in fresh water. WIN55,212-2 at 0.5 and 1 µg/mL almost completely stopped fish activity even in darkness and at 10 µg/mL induced mortality. Spending 24 h in fresh water almost reversed drug-induced immobilization, even in WIN55,212-2-treated groups. Subjects were evaluated for responses to additional cannabidiol after WIN55,212-2 exposure. Cannabidiol attenuated WIN55,212-2-induced abnormal immobilization, whereas commensurate doses of cannabidiol and WIN55,212-2 produced a mixed response. In conclusion, the behavioral effects of marijuana depend on the ratio of the two different cannabinoid properties. The repeated light and dark test might be a suitable method for drug-induced behavioral assay.
doi:10.1101/2020.07.13.200428 fatcat:mrrln7sqvbcebjry4zfxofghzq

Video-assisted thoracic surgery for pleuroperitoneal communication

Shota Mitsuboshi, Hideyuki Maeda, Masato Kanzaki
2019 Surgical Case Reports  
Hydrothorax due to pleuroperitoneal communication (PPC) is a rare complication of continuous ambulatory peritoneal dialysis (CAPD). Approximately 50% of the patients need to convert to hemodialysis. A 65-year-old man with chronic renal failure due to membranoproliferative glomerulonephritis underwent CAPD. Seven months after starting CAPD, a chest X-ray showed a right hydrothorax. For performing radioscintigraphy, 99mTc-macro-aggregated albumin was administered into the peritoneal cavity with
more » ... alysate, and a leakage point of the dialysate into the right pleural cavity was detected. He was diagnosed with PPC and underwent video-assisted thoracic surgery (VATS). The hole was closed by direct suturing and reinforced by a pedicled latissimus dorsi muscle flap (LDM). The patient resumed CAPD 7 weeks later and had no recurrence of the right hydrothorax. VATS was a useful method for treating PPC. A pedicled LDM flap is an effective material for preventing the recurrence of PPC.
doi:10.1186/s40792-019-0595-8 pmid:30783792 pmcid:PMC6381193 fatcat:uletsnpqqnhlhfz73kfrkhpct4

Applying data mining to data analysis in manufacturing [chapter]

Hideyuki Maki, Akira Maeda, Toyohisa Morita, Hiroyuki Akimori
1999 Global Production Management  
In analyzing data from advanced manufacturing processes, it is important to integrate various types of data such as numerical, symbolic, and time series data, however, so large is the volume of data created by integration that engineers are not able to examine all of it. Data mining is a method for extracting information from large databases that can help to analyze the integrated data obtained from advanced manufacturing processes. We have developed a data mining method for analyzing
more » ... ing data that consists of three steps -feature extraction, combinatorial search, and presentation. We applied the method to LSI fault analysis and found that data mining is useful for indicating to engineers where to focus their attention when looking for faults.
doi:10.1007/978-0-387-35569-6_40 fatcat:g2lzmgzkavg7bhyyeurk6y3owe

Microwave Hall effect measurement for materials in the skin depth region [article]

Ryo. Ogawa, Tatsunori Okada, Hideyuki Takahashi, Fuyuki Nabeshima, Atsutaka Maeda
2020 arXiv   pre-print
We developed a new microwave Hall effect measurement method for materials in the skin depth region at low temperatures using a cross-shaped bimodal cavity. We analytically calculated electromagnetic fields in the cross-shaped cavity, and the response of the cavity including the sample, whose property is represented by the surface impedance tensor; further, we constructed the method to obtain the Hall component of the surface impedance tensor in terms of the change in resonance characteristics.
more » ... o confirm the validity of the new method, we applied our method to measure the Hall effect in metallic Bi single crystals at low temperatures, and we confirmed that the microwave Hall angles coincide with the DC Hall angle. Thus, it becomes clear that the Hall angle measurement under cryogenic conditions becomes possible without any complicated tuning mechanisms, and our bimodal cavity method can be used to measure the microwave Hall effect on materials in the skin depth region. The result opens a new approach to discuss the Hall effect in condensed matter physics such as the microwave flux-flow Hall effect in superconductors.
arXiv:2011.12654v1 fatcat:bfeblemj5nacfd342433wbwuc4

Dust in Supernovae; Formation and Evolution [article]

Takashi Kozasa, Takaya Nozawa, Nozomu Tominaga, Hideyuki Umeda, Keiichi Maeda, Ken'ichi Nomoto
2009 arXiv   pre-print
Core--collapsed supernovae (CCSNe) have been considered to be one of sources of dust in the universe. What kind and how much mass of dust are formed in the ejecta and are injected into the interstellar medium (ISM) depend on the type of CCSNe, through the difference in the thickness (mass) of outer envelope. In this review, after summarizing the existing results of observations on dust formation in CCSNe, we investigate formation of dust in the ejecta and its evolution in the supernova remnants
more » ... (SNRs) of Type II--P and Type IIb SNe. Then, the time evolution of thermal emission from dust in the SNR of Type IIb SN is demonstrated and compared with the observation of Cas A. We find that the total dust mass formed in the ejecta does not so much depend on the type; ∼ 0.3-0.7 M_ in Type II--P SNe and ∼ 0.13 M_ in Type IIb SN. However the size of dust sensitively depends on the type, being affected by the difference in the gas density in the ejecta: the dust mass is dominated by grains with radii larger than 0.03 μm in Type II-P, and less than 0.006 μm in Type IIb, which decides the fate of dust in the SNR. The surviving dust mass is ∼ 0.04-0.2 M_ in the SNRs of Type II--P SNe for the ambient hydrogen density of n_ H=10.0-1.0 cm^-3, while almost all dust grains are destroyed in the SNR of Type IIb. The spectral energy distribution (SED) of thermal emission from dust in SNR well reflects the evolution of dust grains in SNR through erosion by sputtering and stochastic heating. The observed SED of Cas A SNR is reasonably reproduced by the model of dust formation and evolution for Type IIb SN.
arXiv:0903.0217v2 fatcat:xtuj5oodvjb2bes56qg364iefi


Tomohiro Amemiya, Hideyuki Ando, Taro Maeda
2005 Proceedings of the 2005 international conference on Augmented tele-existence - ICAT '05  
This paper describes the design of a novel force perception method and the development of a handheld force display based on the method. The method is based on the nonlinear characteristics of human tactile perception; humans feel rapid acceleration more strongly than slow acceleration. The method uses periodic prismatic motion to create asymmetric acceleration leading to a virtual force vector. A prototype of the handheld force display that generates one-directional force using a relatively
more » ... le mechanism was built, and its performance tested in terms of both physical and perceptual characteristics. We verify the feasibility of the proposed method through experiments that determine the display's motor's rotational frequency that maximizes the perception of the virtual force vector.
doi:10.1145/1152399.1152436 dblp:conf/icat/AmemiyaAM05 fatcat:quh4echkcjeybfu3dznrlekb44

Hypernovae and their nucleosynthesis

Ken'ichi Nomoto, Keiichi Maeda, Hideyuki Umeda, Takuya Ohkubo, Jingsong Deng, Paolo Mazzali
2003 Symposium - International astronomical union  
Maeda et al. (2002) calculated the nucleosynthesis in aspherical explosions.  ... 
doi:10.1017/s0074180900212485 fatcat:t2jyz7e32ndhrfdpkxejvg5y6e

The Brain/MINDS 3D digital marmoset brain atlas [article]

Alexander Woodward, Tsutomu Hashikawa, Masahide Maeda, Takaaki Kaneko, Keigo Hikishima, Atsushi Iriki, Hideyuki Okano, Yoko Yamaguchi
2017 bioRxiv   pre-print
We present a new 3D digital brain atlas of the non-human primate, common marmoset monkey (Callithrix jacchus), with MRI and coregis- tered Nissl histology data. To the best of our knowledge this is the first comprehensive digital 3D brain atlas of the common marmoset having nor- malized multi-modal data, cortical and sub-cortical segmentation, and in a common file format (NIfTI). The atlas can be registered to new data, is useful for connectomics, functional studies, simulation and as a
more » ... e. The atlas was based on previously published work but we provide several critical improvements to make this release valuable for researchers. Nissl histology images were processed to remove illumination and shape artifacts and then normalized to the MRI data. Brain region segmentation is provided for both hemispheres. The data is in the NIfTI format making it easy to integrate into neuroscience pipelines, whereas the previous atlas was in an inaccessible file format. We also provide cortical, mid-cortical and white matter boundary segmentations useful for visualization and analysis.
doi:10.1101/228676 fatcat:thcwtyu6njfrbay7jzvn2dq2oa

Embossed touch display

Hideyuki Ando, Junji Watanabe, Masashi Nakatani, Tomohiro Amemiya, Taro Maeda
2006 ACM SIGGRAPH 2006 Emerging technologies on - SIGGRAPH '06  
. * e-mail: (hide,t-amemiya,maeda) † ‡ Demonstration In addition to the tactile function of the display, visual  ... 
doi:10.1145/1179133.1179142 dblp:conf/siggraph/AndoWNAM06 fatcat:aem6vccnvrcyjhuhzqx3nk2ogm

Standardized Method for the Assessment of Behavioral Responses of Zebrafish Larvae

Hideyuki Maeda, Noritoshi Fukushima, Akihiro Hasumi
2021 Biomedicines  
Zebrafish are easy to breed in a laboratory setting as they are extremely fertile and produce dozens of eggs per set. Because zebrafish eggs and the skin of the early-stage larvae are transparent, their embryos and the hearts and muscles of their larvae can be easily observed. Multiple rapid analyses of heart rate and behavior can be performed on these larvae simultaneously, enabling investigation of the influence of neuroactive substances on abnormal behavior, death, and associated
more » ... mechanisms. Zebrafish larvae are becoming increasingly popular among researchers and are used in laboratories worldwide to study various vertebrate life phenomena; more experimental systems using zebrafish will undoubtedly be developed in the future. However, based on the available literature, we believe that the conceptualization of a protocol based on scientific evidence is necessary to achieve standardization. We exposed zebrafish larvae at 6–7 days post-fertilization to 50 repeated light–dark stimuli at either 15-min or 5-min intervals. We measured the traveled distance and habituation time through a video tracking apparatus. The traveled distance stabilized after the 16th repetition when the zebrafish were exposed to light–dark stimuli at 15-min intervals and after the 5th repetition when exposed at 5-min intervals. Additionally, at 15-min intervals, the peak of the traveled distance was reached within the first minute in a dark environment, whereas at 5-min intervals, it did not reach the peak even after 5 min. The traveled distance was more stable at 5-min intervals of light/dark stimuli than at 15-min intervals. Therefore, if one acclimatizes zebrafish larvae for 1 h and collects data from the 5th repetition of light/dark stimuli at intervals of 5 min in the light/dark test, a stable traveled distance result can be obtained. The establishment of this standardized method would be beneficial for investigating substances of unknown lethal concentration.
doi:10.3390/biomedicines9080884 fatcat:aszxxkhohrc6fb5z4yu2wixd64

Influence of Helicobacter pylori Infection on the Small Intestinal Mucosa

Mitsunori Maeda, Masakazu Nakano, Hideyuki Hiraishi
2013 ISRN Endoscopy  
Background/Aims. To investigate the role of Helicobacter pylori infection in the development of enteritis (small intestinal mucosal injury). Methodology. Between April 2007 and January 2013, 99 patients undergoing capsule endoscopy (CE) were tested for anti-H. pylori immunoglobulin G antibody (Hp-IgG) using an enzyme-linked immunosorbent assay (ELISA). None of the patients had been treated for H. pylori infection or diagnosed as having Crohn's disease or any other clinically apparent small
more » ... tinal disorders prior to the CE. Results. The overall Hp-IgG-positive rate was 26.3%. The incidence of enteritis, as diagnosed by CE, tended to be lower in the Hp-IgG-positive patients (23.1%) than in the Hp-IgG-negative patients (38.4%) (). When patients receiving aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs), well-known causes of enteritis, were excluded, the incidence of enteritis in the Hp-IgG-positive patients (11.7%) was significantly lower than that in the Hp-IgG-negative patients (43.7%) (). A binomial logistic regression analysis revealed a significant negative relationship between Hp-IgG positivity and the presence of enteritis in patients receiving neither aspirin nor NSAIDs (). Conclusions. Our data indicated that H. pylori positivity was inversely associated with the prevalence of enteritis.
doi:10.5402/2013/408931 fatcat:vgdt5zx2djbz3hbdf5rzkh5wza

The formation and proprietary structure of Taira Family territory

Hideyuki MAEDA
2012 Shigaku zasshi  
doi:10.24471/shigaku.121.8_1411 fatcat:znow24agrrgjtg7z73c3wyvage

Video-assisted thoracoscpic muscle transposition for acute empyema

Hideyuki Maeda, Masato Kanzaki, Takuma Kikkawa, Takamasa Onuki
2015 Journal of Cardiothoracic Surgery  
Muscle flap transposition is one of the surgical treatment options for empyema with alveolarpleural fistula (APF) or bronchopleural fistula (BPF). This surgical procedure is invasive because it is typically performed by standard thoracotomy. We performed video-assisted thoracoscopic surgery (VATS) debridement, decortication, and obliteration of an empyema cavity using a pedicled latissimus dorsi muscle (LDM) flap harvested through minimal skin incisions for a case of acute empyema with APF.
more » ... VATS procedure is effective and less invasive and can be a new option for the thoracoscopic surgical treatment of acute empyema with APF.
doi:10.1186/s13019-015-0332-8 pmid:26449404 pmcid:PMC4599663 fatcat:syvwtrp57rdgteklfpvj6yltve
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