Lattice Boltzmann model for capillary interactions between particles at a liquid-vapor interface under gravity

A computational technique based on the lattice Boltzmann method (LBM) is developed to simulate the wettable particles adsorbed to a liquid-vapor interface under gravity. The proposed technique combines the improved smoothed-profile LBM for the treatment of moving solid particles in a fluid and the free-energy LBM for the description of a liquid-vapor system. Five benchmark two-dimensional problems are examined: (A) a stationary liquid drop in the vapor phase; a wettable particle adsorbed to a liquid-vapor interface in (B) the absence and (C) the presence of gravity; (D) two freely moving particles at a liquid-vapor interface in the presence of gravity (i.e., capillary flotation forces); and (E) two vertically constrained particles at a liquid-vapor interface (i.e., capillary immersion forces). The simulation results are in good quantitative agreement with theoretical estimations, demonstrating that the proposed technique can reproduce the capillary interactions between wettable particles at a liquid-vapor interface under gravity

Guest-dependent photochromism of 3,3′-bis-(4-fluoro-phenyl)-3H,3′H- [2,2′]biindenylidene-1,1′-dione in its inclusion crystals

Inclusion crystals of 3,3′-bis-(4-fluoro-phenyl)-3H,3′H- [2,2′]biindenylidene-1,1′-dione (1b) showed a reversible color change from yellow to red upon photoirradiation, although 1b itself did not show photochromic property in the solid state

Factors associated with motivation and hesitation to work among health professionals during a public crisis: a cross sectional study of hospital workers in Japan during the pandemic (H1N1) 2009

<p>Abstract</p> <p>Background</p> <p>The professionalism of hospital workers in Japan was challenged by the pandemic (H1N1) 2009. To maintain hospital function under critical situations such as a pandemic, it is important to understand the factors that increase and decrease the willingness to work. Previous hospital-based studies have examined this question using hypothetical events, but so far it has not been examined in an actual pandemic. Here, we surveyed the factors that influenced the motivation and hesitation of hospital workers to work in Japan soon after the pandemic (H1N1) 2009.</p> <p>Methods</p> <p>Self-administered anonymous questionnaires about demographic character and stress factors were distributed to all 3635 employees at three core hospitals in Kobe city, Japan and were collected from June to July, 2009, about one month after the pandemic (H1N1) in Japan.</p> <p>Results</p> <p>Of a total of 3635 questionnaires distributed, 1693 (46.7%) valid questionnaires were received. 28.4% (N = 481) of workers had strong motivation and 14.7% (N = 249) had strong hesitation to work. Demographic characters and stress-related questions were categorised into four types according to the odds ratios (OR) of motivation and hesitation to work: some factors increased motivation and lowered hesitation; others increased motivation only; others increased hesitation only and others increased both motivation and hesitation. The strong feeling of being supported by the national and local governments (Multivariate OR: motivation; 3.5; CI 2.2-5.4, hesitation; 0.2; CI 0.1-0.6) and being protected by hospital (Multivariate OR: motivation; 2.8; CI 2.2-3.7, hesitation; 0.5; CI 0.3-0.7) were related to higher motivation and lower hesitation. Here, protection included taking precautions to prevent illness among workers and their families, providing for the care of those who do become ill, reducing malpractice threats, and financial support for families of workers who die on duty. But 94.1% of the respondents answered protection by the national and local government was weak and 79.7% answered protection by the hospital was weak.</p> <p>Conclusions</p> <p>Some factors have conflicting effects because they increase both motivation and hesitation. Giving workers the feeling that they are being protected by the national and local government and hospital is especially valuable because it increases their motivation and lowers their hesitation to work.</p

男子大学生の長距離選手におけるパワーに関する形態学的評価

本研究の目的は,男子大学生の長距離選手のパワー(体重×走速度,kg・m/sec.)について形態学的に評価することである。対象は,2010年度の駅伝大会に参加する予定の主要な30大学の選手である。収集された項目は,身長(cm),体重(kg)と5,000m走および10,000m走の自己記録である。なお,5,000m走では694名,10,000m走では507名の自己記録が収集された。その結果,つぎのようにまとめられた。パワーが体表面積と体重との差として,各項目のT得点からつぎの式が得られた。5,000m走:log(Power) =0.3397・logS+0.6597・logW 10,000m走:log(Power) =0.3337・logS+0.6658・logW (S:体表面積(cm^2),W:体重(g)) これらの式から推定されたパワーは,実際の各選手のパワーとの間に差がみられず,相関関係はいずれも有意に認められ,理論値は実際のパワーを70%以上説明できることを明らかにした。これらから,求められた体表面積と体重とから長距離選手のパワーを評価できることを示唆するものであった。The purpose of this study is to perform a morphological evaluation of the power (body weight × running speed, kg・m/sec.) of male college student long-distance runners. The subjects of the study were runners from the main 30 universities participating in the ekiden convention in the 2010 academic year. The following data were collected : height (cm), weight (kg), and their times on the 5,000m run and/or 10,000m run. Data were collected from 507 participants of the 10,000m run and from 694 participants of the 5,000m run, and summarized as follows. The following formula was obtained from the T-score of each data item, with power as a difference of body surface area and weight. 5,000m run : log (Power) =0.3397・logS+0.6597・logW 10,000m run : log (Power) =0.3337・logS+0.6658・logW (S : body surface area (cm^2), W:weight (g)) . There was no significant difference between theoretical power as calculated by the theoretical formula and the runner\u27s actual power. Each correlation was confirmed as significant, and it was clearly demonstrated that actual power could be 70% or more accounted for by the theoretical value. This suggests that a long-distance runner\u27s power can be estimated from body surface area and weight

Die heiligheidswet (Levitikus 17-26) : 'n historiese en teologiese beoordeling

Proefskrif (D. Th.) -- Universiteit van Stellenbosch, 1984.Full text to be digitised and attached to bibliographic record

Die totstandkoming van die Pentateug volgens M. Noth : 'n kritiese evaluering

Thesis (MTh)--Stellenbosch University, 1979.Full text to be digitised and attached to bibliographic record

Supramolecular complex of C60 with tetrakis(p-iodophenyl)ethylene†

When complexed with tetrakis(p-halophenyl)ethylene, the C60 molecule arranges to form chiral inclusion crystals. The supramolecular organisation of C60 by inclusion crystallisation with host compounds has been of considerable interest in recent years due to their potential application to new materials with novel functions.1 The linear [2+2] polymerisation of C60 molecules in the supramolecular complex has also been reported.2 Here, we report the synthesis and crystal structure of the new C60 molecular complex with tetrakis(piodophenyl)ethylene 1d in which C60 molecules are arranged in linear columns