2,706 research outputs found
Letter from Hideo Hashimoto to the Japanese Methodist Church, April 13, 1942
No full textTyped correspondence from Hideo Hashimoto, Pastor of the Japanese Methodist Church, to his congregation and friends. He expresses his feelings towards the current state of the country the day before the mass removal order.The Bishop James Chamberlain Baker Collection includes letters, documents, and articles about Japanese Americans during World War II. Subjects in the collection include Japanese Americans mass removal, Pearl Harbor and the aftermath, religion, and support from the non-Japanese American community. The collection was digitized and made accessible online by CSUDH Gerth Archives and Special Collections
Frequency Domain Two-Stage Beamforming for Phased Array Imaging Using the Fast Hankel Transform
No full textThe huge amount of data that needs to be transferred between probe and imaging system becomes a major issue when the data transfer capacity is limited, e.g. in handheld systems, wireless probes and miniaturized probes. The amount of data can be significantly reduced by using two-stage beamforming. The first stage consists of a fixed focus algorithm that compresses channel data to scanline data. This can be done by integrated electronics in the handle. In the second stage the scanline data is further beamformed in the imaging system to obtain images that are synthetically focused at all depths. Here we present a wave equation two-stage beamforming method for phased array imaging that is computationally efficient and outperforms PSASB, a time-of-flight alternative, in terms of lateral resolution and contrast-to-noise ratio.Accepted Author ManuscriptImPhys/Acoustical Wavefield ImagingImPhys/Quantitative Imagin
Regularized Capon Beamformer Using ℓ1-Norm Applied to Photoacoustic Imaging
No full textDelay-and-Sum (DAS), as a non-adaptive beamforming method, is one of the most common algorithms used in Photoacoustic imaging due to its simple implementation. The results obtained from this algorithm suffer from low resolution and high sidelobes. The adaptive Minimum variance (MV) method improves the image quality compared to DAS in terms of resolution and contrast. In this paper, it is proposed to add a ℓ1-norm regularization term to the conventional MV minimization problem and create a new sparse beamforming method, named Modified-Sparse-Mv (ms-Mv)algorithm. In fact, the sparsity of the output is forced to the beampattern by adding this new sparse added term, which results in more noise reduction and sidelobe suppression compared to MV. The minimization problem is convex, and therefore, it can be solved using an iterative algorithm. The results show that the proposed MS-MV method improves the signal-to-noise-ratio for about 5.36 dB and 6.44 dB compared to DAS and MV, respectively, for the designed wire phantom.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.ImPhys/Acoustical Wavefield Imagin
Efficient and Flexible Spatiotemporal Clutter Filtering of High Frame Rate Images Using Subspace Tracking
No full textCurrent methods to measure blood flow using ultrafast Doppler imaging often make use of a Singular Value Decomposition (SVD). The SVD has been shown to be an effective way to remove clutter signals associated with slow moving tissue. Conventionally, the SVD is calculated from an ensemble of frames, after which the first dominant eigenvectors are removed. The Power Doppler Image (PDI) is then computed by averaging over the remaining components. The SVD method is computationally intensive and lacks flexibility due to the fixed ensemble length. We propose a method, based on the Projection Approximation Subspace Tracking (PAST) algorithm, which is computationally efficient and allows us to sequentially estimate and remove the principal components, while also offering flexibility for calculating the PDI, e.g. by using any convolutional filter. During a functional ultrasound (fUS) measurement, the intensity variations over time for every pixel were correlated to a known stimulus pattern. The results show that for a pixel chosen around the location of the stimulation electrode, the PAST algorithm achieves a higher Pearson correlation coefficient than the state-of-the-art SVD method, highlighting its potential to be used for fUS measurements.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
High Frequency Functional Ultrasound in Mice
No full textFunctional ultrasound (fUS) is a relatively new imaging modality to study the brain with a high spatiotemporal resolution and a wide field-of-view. In fUS detailed images of cerebral blood flow and volume are used to derive functional information, as changes in local flow and/or volume may reflect neuronal activation through neurovascular coupling. Most fUS studies so far have been performed in rats. Translating fUS to mice, which is a favorable animal model for neuroscience, pleads for a higher spatial resolution than what has been reported so far. As a consequence the temporal sampling of the blood flow should also be increased in order to adequately capture the wide range in blood velocities, as the Doppler shifts are inversely proportional to the spatial resolution. Here we present our first detailed images of the mouse brain vasculature at high spatiotemporal resolution. In addition we show some early experimental work on tracking brain activity upon local electrical stimulation.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Signal Processing System
Aspectos quirúrgicos de la enfermedad de Hashimoto
No full textAs regards a retrospective series of 55 patients, 34 ofwhom were operated on, the author analyses thediagnostica/ value of thyroid cytology and antithyroidantibodies dosage for Hashimoto 's disease. In the group ofoperated patients. low sensitivity of cytology stands out.Se analiza el valor diagnóstico de la citología tiroidea y dela dosificación de anticuerpos antitiroideos en laenfermedad de Hashimoto. en una serie retrospectiva de55 enfermos, de los cuales 34 fueron operados. Sedestaca la baja sensibilidad de la citología en el grupo depacientes operados
Letter from Frances K. Hashimoto, 1982 General Chairperson, Nisei Week Japanese Festival, to Jim Matsuoka, January 15, 1982
No full textLetter from Frances K. Hashimoto, 1982 General Chairperson, Nisei Week Japanese Festival, to Jim Matsuoka, regarding Nisei Week.The Jim Matsuoka Nikkei for Civil Rights and Redress Collection includes brochures, meeting notes and agendas, publications, booklets, and other material related to the Nikkei for Civil Rights and Redress (NCRR), formally known as the National Coalition for Redress/Reparations. The National Coalition for Redress/Reparations was officially formed on July 12, 1980, and included members of the Los Angeles Community Coalition for Redress/Reparations (LACCRR), Japanese Community Progressive Alliance (JCPA), Tule Lake Committee, Nihonmachi Outreach Committee, the Asian/Pacific Student Union, and other members of the community. The material was collected by Jim Matsuoka, a founding member of the organization. Matsuoka also served on the board and was the treasurer. In addition to the NCRR material, the collection also contains event flyers and Day of Remembrance material. For issues of the Nikkei for Civil Rights and Redress newsletter "Banner" published after 2007, visit the NCRR website at https://ncrr-la.org/
マウス四塩化炭素およびカルバマゼピン肝障害モデルにおける肝臓内プロスタグランジンE2量の調節因子に関する研究
No full text主査：川畑篤史 教授 学内授与番号：薬第177号
Hiroaki Shimada, Ryota Hashimoto, Aya Aoki, Saya Yamada, Ken-Ichi Oba, Atsushi Kawase, Takeo Nakanishi, Masahiro Iwaki "The regulatory mechanism involved in the prostaglandin E2 disposition in carbon tetrachloride-induced liver injury" Prostaglandins, Leukotrienes and Essential Fatty Acids, Volume155, April 2020, 102081
https://doi.org/10.1016/j.plefa.2020.102081 掲載
Ken-ichi Oba, Hiroaki Shimada, Ryota Hashimoto, Atsushi Kawase, Takeo Nakanishi, Masahiro Iwaki "Assessment of hepatic prostaglandin E2 level in carbamazepine induced liver injury" Endocr Regul. 2022 Feb 18;56(1):22-30.
doi:10.2478/enr-2022-0003 掲載application/pd
Letter From Hideo Hashimoto to friends
No full textLetter written from Fresno Assembly Center to friends in the "outside" world describing the harsh effects of incarceration including quotes from the letters of incarcerees in other camps as well as from cited publications. Lists ways and actions to help the incarcerees. Also includes descriptions of recreation, education, and church activities.The Japanese American Relocation Collection is composed of ephemera related to the relocation program during World War II. Items include the official government report of Manzanar Relocation Center, a photo album, post-war activism materials related to preserving and remembering the camps, various clippings, and documents. The strength of this collection is found in its many perspectives on the controversial relocation program and how it has been presented since World War II
Long‐term language abilities of subjects with hearing impairment trained by the written‐oral language method
No full text金沢大学博士（保健学）博士論文本文Full 以下に掲載：金沢大学つるま保健学会誌 38(1) pp.1-10 2014.金沢大学つるま保健学会. 共著者：Kahoru Hashimoto, Masako Notoya, Hiromi Harada, Katsumi Inoue, Ken Nakatani, Tomokazu Yoshizakidoctoral thesi
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