Non-LTE Line-Formation and Abundances of Sulfur and Zinc in F, G, and K Stars

Extensive statistical-equilibrium calculations on neutral sulfur and zinc were carried out, in order to investigate how the non-LTE effect plays a role in the determination of S and Zn abundances in F, G, and K stars. Having checked on the spectra of representative F-type stars (Polaris, Procyon, and alpha Per) and the Sun that our non-LTE corrections yield a reasonable consistency between the abundances derived from different lines, we tried an extensive non-LTE reanalysis of published equivalent-width data of S I and Zn I lines for metal-poor halo/disk stars. According to our calculations, S I 9212/9228/9237 lines suffer significant negative non-LTE corrections amounting to <~ 0.2--0.3 dex, while LTE is practically valid for S I 8683/8694 lines. Embarrassingly, as far as the very metal-poor regime is concerned, a marked discordance is observed between the [S/Fe] values from these two abundance indicators, in the sense that the former attains a nearly flat plateau (or even a slight downward bending) while the latter shows an ever-increasing trend with a further lowering of metallicity. The reason for this discrepancy is yet to be clarified. Regarding Zn, we almost confirmed the characteristic tendencies of [Zn/Fe] reported from recent LTE studies (i.e., an evident/slight increase of [Zn/Fe] with a decrease of [Fe/H] for very metal-poor/disk stars), since the non-LTE corrections for the Zn I 4722/4810 and 6362 lines (tending to be positive and gradually increasing towards lower [Fe/H]) are quantitatively of less significance (<~ 0.1 dex).Comment: 33 pages, 7 figures, PASJ, Vol. 57, No. 5 (2005) in pres

Main group catalysis for H2 purification based on liquid organic hydrogen carriers

Molecular hydrogen (H2) is one of the most important energy carriers. In the midterm future, a huge amount of H2 will be produced from a variety of hydrocarbon sources through conversion and removal of contaminants such as CO and CO2. However, bypassing these purification processes is desirable, given their energy consumption and environmental impact, which ultimately increases the cost of H2. Here, we demonstrate a strategy to separate H2 from a gaseous mixture of H2/CO/CO2/CH4 that can include an excess of CO and CO2 relative to H2 and simultaneously store it in N-heterocyclic compounds that act as liquid organic hydrogen carriers (LOHCs), which can be applied to produce H2 by subsequent dehydrogenation. Our results demonstrate that LOHCs can potentially be used for H2 purification from CO- and CO2-rich crude H2 in addition to their well-established use in H2 storage.Hashimoto T., Asada T., Ogoshi S., et al. Main group catalysis for H2 purification based on liquid organic hydrogen carriers. Science Advances 8, eade0189 (2022); https://doi.org/10.1126/sciadv.ade0189

地方公務員労働者における労働条件決定システムの法的研究・上 :小樽市職員の労働条件決定システムの法的構成

論

地方公務員労働者における労働条件決定システムの法的研究・下-小樽市職員の事例の実証的法的考察をとおして

論

Fish Fauna in Coastal Area of Kashima Island on Border Zone between Hiroshima Bay and Aki-Nada Sea <Short Report>

瀬戸内海中西部水域において,近年冬期の海水温の上昇傾向が確認され,水中環境への影響が危惧されている。そこで浅海魚類群集の現況把握を目的に,2011 年9 月から2012 年8 月にかけて,広島湾最南部に位置する鹿島の沿岸2 定点において潜水センサス法による魚類相調査を実施した。総計24 科50 種の魚類を確認した。より南方の水域を主要分布域とする魚種は,イシガキダイ,オヤビッチャ,ゴンズイの3 種のみであった。いずれも高水温期に出現し,冬の低水温期に消失していた。各月の出現魚種数と水温との間には有意な正の相関関係が認められ,9 月に最多の32 種を,2 月に最少の7 種を記録した。他水域における魚類相データと本研究との魚種共通率から,鹿島は温帯水域と高い類似性を有することが確認された。本調査水域においては,現状においても,冬期の水温条件が南方系魚類を含め浅海性魚種の生存に大きな制約的影響を与えていると考えられた。Within the mid-western zone of the Seto Inland Sea including Hiroshima Bay and Aki-nada Sea, environmental changes such as the recent appearance of tropical/warm temperate fish have been observed. This phenomenon is associated with the warming of the water temperature especially during winter. To obtain basic data on the present conditions of the fish fauna, we conducted a year-long underwater fish census on two shallow water sites around Kashima Island from September 2011 to August 2012. A total of 50 species (24 families) were recorded in our monthly surveys, including three species (Plotosus japonicus, Abudefduf vaigiensis, Oplegnathus punctatus) normally occurring in tropical/warm temperate waters. These three species appeared during the warm water season and subsequently disappeared in winter. We found a positive correlation between the number of fish species and water temperature recorded each month (r = 0.85, p < 0.05). The diversity of fish recorded in the present study was very similar to the diversities of fish in temperate waters. Because of the rapid decrease in species number during winter, we suggest that the low water temperature during winter strongly restricts the number of survivors in the fish community even in the temperate waters of the mid-western area of the Seto Inland Sea

Kazuya NAGASAWA

Abstract Anglerfish Lophius litulon (Jordan) caught commercially in the East China Sea off western Japan were found to be infected with the chondracanthid copepod Acanthochondria spiriger

Exo2EgoDVC: Dense Video Captioning of Egocentric Procedural Activities Using Web Instructional Videos

We propose a novel benchmark for cross-view knowledge transfer of dense video captioning, adapting models from web instructional videos with exocentric views to an egocentric view. While dense video captioning (predicting time segments and their captions) is primarily studied with exocentric videos (e.g., YouCook2), benchmarks with egocentric videos are restricted due to data scarcity. To overcome the limited video availability, transferring knowledge from abundant exocentric web videos is demanded as a practical approach. However, learning the correspondence between exocentric and egocentric views is difficult due to their dynamic view changes. The web videos contain mixed views focusing on either human body actions or close-up hand-object interactions, while the egocentric view is constantly shifting as the camera wearer moves. This necessitates the in-depth study of cross-view transfer under complex view changes. In this work, we first create a real-life egocentric dataset (EgoYC2) whose captions are shared with YouCook2, enabling transfer learning between these datasets assuming their ground-truth is accessible. To bridge the view gaps, we propose a view-invariant learning method using adversarial training in both the pre-training and fine-tuning stages. While the pre-training is designed to learn invariant features against the mixed views in the web videos, the view-invariant fine-tuning further mitigates the view gaps between both datasets. We validate our proposed method by studying how effectively it overcomes the view change problem and efficiently transfers the knowledge to the egocentric domain. Our benchmark pushes the study of the cross-view transfer into a new task domain of dense video captioning and will envision methodologies to describe egocentric videos in natural language