3H(e,e\u27K+)X 反応におけるラムダ粒子準自由生成の研究

Tohoku University中村哲課

Cross-cultural Image Database System with Impression-based Color Arrangement

Colors and color combinations are tightly associated with human impressions for image data, and color- oriented impression varies between cultures. Though the shape and structure of images are important feature for retrieving similar images in the field of Content-based Image Retrieval (CBIR), in this paper, we focus on color feature of images because the purpose of our research is to create a cross-cultural and dynamic media designing environment using culture-dependent color-impressions for cultural property's images, especially, images of patterns used in cultural products. The main feature of our cross- cultural image database system for cultural-product design is characterized as the following three functions: (1) Impression-based color arrangement, (2) Culture-based color-space transformation among culture-dependent color collections, and (3) Attribute- based data selection and mapping. First, in our system, a set of images of patterns are colored by impression- based color combinations. Second, the set of colors in images are transformed by culture-dependent color collections. Third, the target images are selected sharply by the attribute of images such as country, region, village, tribe, author, designer, weaver, e.t.c. and mapped onto the multi-dimensional view. The most important contribution of our research is that our system creates linkage among different cultures by sharing and arranging multimedia information by collaborative work. The applications hold enormous potential for promoting regional economic development or innovative tourist business by cooperative designing of cultural products and new industries targeting global markets with remote collaborators in different cultural background

Commissioning of the hypertriton binding energy measurement at MAMI

A high-precision hypernuclear experiment has been commissioned at the Mainz Microtron (MAMI) to determine the hypertriton Λ binding energy via decay-pion spectroscopy. The method has been successfully pioneered with 4ΛH studies in the last decade. The experiment makes use of a novel high luminosity lithium target with a length of 45mm while being only 0.75mm thick to keep momentum smearing of the decay pions low. The target-to-beam alignment as well as the observation of the deposited heat is achieved with a newly developed thermal imaging system. Together with a precise beam energy determination via the undulator light interference method a recalibration of the magnetic spectrometers will be done to obtain a statistical and systematic error of about 20 keV. The experiment started in the summer of 2022 and initial optimization studies for luminosity and data quality are presented