Generating perceptually-correct shadows for mixed reality

Even though shadows are important for photometric consis-tency in Mixed Reality (MR) [1]. When human cannot perceive the inconsistency of artificial shadows which are not physically correct, they are acceptable as “perceptually-correct ” shadows. This paper focuses on the simplification of light source models for generating the perceptually-correct artificial shadows. First, we conducted subjective evaluations to obtain knowledge about the human perception of the shadows. Then the knowledge was ap-plied to control the resolution of the light source map to generate perceptually-correct artificial shadows. Comparative studies among artificial and real shadows justified perceptually correct-ness. All experiments were done using still images, not videos. Our research becomes a reference to determine the resolution of light source map in an MR scene

Efficient Catalytic Electrode for CO₂ Reduction Realized by Physisorbing Ni(cyclam) Molecules with Hydrophobicity Based on Hansen’s Theory

An electrochemical electrode physisorbed with Ni­(cyclam) complex molecules containing tetraphenylborate ions (BPh₄^–) as counteranions shows catalytic activity for the reduction reaction of CO₂ to CO in an aqueous electrolyte, superior to that of an electrode physisorbed with conventional [Ni­(cyclam)]­Cl₂ complex molecules. The BPh₄^–-containing Ni­(cyclam) is inferred as having high hydrophobicity based on its Hansen solubility parameter (HSP), with an interaction sphere excluding HSPs of water in a three-dimensional vector space. The high hydrophobicity of BPh₄^–-containing Ni­(cyclam) molecules inhibits their dissolution into aqueous electrolyte and retains their immobilization onto the electrode surface, which we believe to result in the improved catalytic activity of the electrode physisorbed with them. HSP analysis also provides an optimized mixing ratio of solvents dissolving BPh₄^–-containing Ni­(cyclam) molecules

Guidelines for Developing Amide-Based Hydrogen Storage Materials

An effective method for developing amide-based high-performance hydrogen storage materials is to prepare appropriate combinations of amides and hydrides. We have proposed that a mixture of an amide with a low decomposition temperature and a hydride showing rapid reaction to ammonia would be an appropriate combination. According to this proposal, the mixture of Mg(NH 2 ) 2 (Mg amide) and LiH (Li hydride) was investigated. The dehydriding temperature of the mixture of Mg(NH 2 ) 2 and 4ÁLiH is lower than that of the mixture of LiNH 2 (Li amide) and 2ÁLiH. A method for preventing ammonia release is increasing the LiH ratio in the mixtures, which results in a reduction in the amount of desorbed hydrogen. The homogeneous dispersion between Mg(NH 2 ) 2 and LiH might be also an important factor for preventing ammonia release

夜間多尿を伴なった膀胱機能障害における夜間尿道留置カテーテル 女性3例での有用性

著者版夜間多尿を伴った膀胱機能障害に夜間尿道留置カテーテルが有用であった3例を経験した.症例1は45歳女性.てんかん発作で精神科入院中に尿閉となり,退院後に排尿困難で受診した.尿意低下を認め,α遮断薬投与で自排尿可能となったが,起床時残尿が多く,間欠式バルーンカテーテルの夜間尿道留置を開始し,残尿はほぼ消失した.症例2は28歳女性.出生直後よりL2以下の二分脊椎による排尿機能障害で,12歳時に左膀胱尿管新吻合術施行後も夜間の尿失禁と頻回の腎盂腎炎を繰り返していた.24時間排尿記録で夜間多尿が判明し,日中のCICに加え,間欠式バルーンカテーテルの夜間尿道留置を行い,腎盂腎炎の再発はなく夜間の尿失禁は消失した.症例3は66歳女性.多発性脳梗塞と同時に便・尿失禁,排尿困難が出現し,夫によるCICでも夜間多尿があり,間欠式バルーンカテーテルの夜間尿道留置を行い,尿失禁は消失し