918 research outputs found

    LipidBlast templates as flexible tools for creating new in-silico tandem mass spectral libraries.

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    Tandem mass spectral libraries (MS/MS) are usually built by acquiring experimentally measured mass spectra from chemical reference compounds. We here show the versatility of in-silico or computer generated tandem mass spectra that are directly obtained from compound structures. We use the freely available LipidBlast development software to generate 15 000 MS/MS spectra of the glucuronosyldiacylglycerol (GlcADG) lipid class, recently discovered for the first time in plants. The generation of such an in-silico MS/MS library for positive and negative ionization mode took 5 h development time, including the validation of the obtained mass spectra. Such libraries allow for high-throughput annotations of previously unknown glycolipids. The publicly available LipidBlast templates are universally applicable for the development of MS/MS libraries for novel lipid classes

    Von K\'arm\'an vortex street in a Bose-Einstein condensate

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    Vortex shedding from an obstacle potential moving in a Bose-Einstein condensate is investigated. Long-lived alternately aligned vortex pairs are found to form in the wake, as for the von K\'arm\'an vortex street in classical viscous fluids. Various patterns of vortex shedding are systematically studied and the drag force on the obstacle is calculated. It is shown that the phenomenon can be observed in a trapped system.Comment: 4 pages, 5 figure

    A GIS-based Support Tool for Exploring Land Use Policy Considering Future Depopulation and Urban Vulnerability to Natural Disasters – A Case Study of Toyohashi City, Japan -

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    AbstractIn Japan, where the aging society is progressing due to depopulation and a high risk of natural disasters, such as earthquakes and floods, many actual urban master plans (MPs) do not consider the relation between countermeasures for future depopulation and disaster mitigation. Local governments do not regard long-term depopulation as a viable opportunity to establish land use policy that promotes reasonable land use by aggregating urban land use to areas with low risk.This paper proposes the development of a tool for the exploration of land use policy that realizes an intensive urban structure by considering future depopulation and urban vulnerability to natural disasters. The tool serves as a GIS-based database of information about disaster risk for floods and earthquakes, future populations, previous and existing urban land use conditions, urban structures. The following results are obtained from a case study. First, experts such as local government can distinguish areas with high risk by two types of areas: 1) areas characterized by a slow progression of depopulation and aging and 2) areas in which it is difficult to sustain the local community and provide public services due to the progression of depopulation and aging. The results of this study can confirm various data on urban structures, such as transportation infrastructure, and core urban areas that provide life services and land use history. Reasonable land use countermeasures for reducing disaster risk can be explored by considering previous and existing conditions of urban land use

    Web Omnidirectional Image Viewer for Field Event Extraction

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    A Web-based image viewer for observing an omnidirectional image of fields is proposed. Conventional monitoring systems are monitoring a narrow area of fields, and their image viewers are not optimized for comparing accumulated images. We implemented two functions of the viewer to compare images and conducted an experiment to evaluate their performance. The experimental results showed that Time-travel mode, which partially shows another image in a circular region on an omnidirectional image, had a high degree of usability for extracting field events from accumulated images. The proposed system can help farmers capture comprehensive, panoramic views of their farm for field management.</jats:p

    Relationships between seismic design conditions and superior design solutions of steel buildings

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    The Japanese version of this paper was published in volume 87, number 802, pages 1257–1266, https://doi.org/10.3130/aijs.87.1257, of the Journal of Structural and Construction Engineering (Transactions of AIJ). The authors have obtained permission from the editor of the Journal of Structural and Construction Engineering (Transactions of AIJ) for secondary publication of the English version in another journal. This paper is a translation of the original Japanese version with slight modifications and corrections.Superior design solutions (SDSs) of seven-story steel buildings are obtained for the space frame system (SFS) and the perimeter frame system (PFS) in various types of structures such as moment frames (MF) and those with buckling restrained braces (BRBF). The SDSs satisfy the design constraints of allowable stress design (ASD) and calculations of resistance and limit state (CRLS) with minimized steel volume. The influences of design conditions are comparatively evaluated. It is found that the maximum inter-story drift ratio for the safety limit in the CRLS for MF can be rationally defined as 2% and ASD can be more dominant for BRBF

    Application of Robotics for Therapeutic Exercise of Neural Disorder

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    Background: The application of robots for rehabilitation has been developing over the past decade. In neuro-rehabilitation, motor learning has become an important topic. To maximize the effect of motor learning, we need to clarify the key muscle and adequate intensity
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