Frequency Effects of Multi-Word Sequences on L2 Learning : Unfolding the Complexity of L2 Syntax Modeling

departmental bulletin pape

Preparation and Characterization of Ti(2)O(3) Films Deposited on Sapphire Substrate by Activated Reactive Evaporation Method

(001)-oriented Ti(2)O(3) films were epitaxially grown on a(001)-face of sapphire single-crystalline substrate by an activated reactive evaporation method. The formation ranges of stoichiometric and nonstoichiometric Ti(2)O(3) films were determined as a function of the substrate temperature (Ts), the oxygen pressure (Po(2)) and the deposition rate. Stoichiometric Ti(2)O(3) films were grown at Ts≧673K under Po(2)≧1.0×10(-4)Torr, which showed the metal-insulator transition with a sharp change in electrical resistivity from 3.5×10(-2) to 2.6×10(-3)Ωcm at 361K. Nonstoichiometric films prepared under less oxidized conditions did not exhibit the transition. The nonstoichiometry of the Ti(2)O(3)films was discussed in terms of excess Ti ions

双曲的ファイバー二橋絡み目補空間の標準的分割の変針構造

広島大学(Hiroshima University)博士(理学)Doctor of Sciencedoctora

A mathematical approach to mechanical properties of networks in thermoplastic elastomers

We employ a mathematical model to analyze stress chains in thermoplastic elastomers (TPEs) with a microphase-separated spherical structure composed of triblock copolymers. The model represents stress chains during uniaxial and biaxial extensions using networks of spherical domains connected by bridges. We advance previous research and discuss permanent strain and other aspects of the network. It explores the dependency of permanent strain on the extension direction, using the average of tension tensors to represent isotropic material behavior. The concept of deviation angle is introduced to measure network anisotropy and is shown to play an essential role in predicting permanent strain when a network is extended in a specific direction. The paper also discusses methods to create a new network structure using various polymers.Comment: 24 pages, 35 figure

Changes in work and life patterns associated with depressive symptoms during the COVID-19 pandemic: an observational study of health app (CALO mama) users

BACKGROUND: During the COVID-19 pandemic, many people refrained from going out, started working from home (WFH), and suspended work or lost their jobs. This study examines how such pandemic-related changes in work and life patterns were associated with depressive symptoms. METHODS: An online survey among participants who use a health app called CALO mama was conducted from 30 April to 8 May 2020 in Japan. Participants consisted of 2846 users (1150 men (mean age=50.3) and 1696 women (mean age=43.0)) who were working prior to the government declaration of a state of emergency (7 April 2020). Their daily steps from 1 January to 13 May 2020 recorded by an accelerometer in their mobile devices were linked to their responses. Depressive symptoms were assessed using the Two-Question Screen. RESULTS: On average, participants took 1143.8 (95% CI -1557.3 to -730.2) fewer weekday steps during the declaration period (from 7 April to 13 May). Depressive symptoms were positively associated with female gender (OR=1.58, 95% CI 1.34 to 1.87), decreased weekday steps (OR=1.22, 95% CI 1.03 to 1.45) and increased working hours (OR=1.73, 95% CI 1.32 to 2.26). Conversely, starting WFH was negatively associated with depressive symptoms (OR=0.83, 95% CI 0.69 to 0.99). CONCLUSIONS: Decreased weekday steps during the declaration period were associated with increased odds of depressive symptoms, but WFH may mitigate the risk in the short term. Further studies on the longitudinal effects of WFH on health are needed

Working from home and dietary changes during the COVID-19 pandemic: A longitudinal study of health app (CALO mama) users

It is plausible that the coronavirus disease pandemic and related changes in work and life patterns affected dietary patterns, but existing studies have limitations owing to a cross-sectional design. Using longitudinal data, we examined dietary changes in people due to the pandemic and work and life patterns. We conducted an online survey on changes in work and life patterns during the pandemic from April 30, 2020, to May 8, 2020, among users of a health app called CALO mama provided in Japan. We retrieved and linked the dietary data for 5929 participants from January 1, 2020, to May 13, 2020. Generalized linear mixed models were used to estimate the frequencies of food intake associated with the pandemic and work and life patterns. During the state of emergency, the frequency of intake of vegetables, beans, seaweeds, fish, meats, dairy products, and snacks increased, whereas alcohol intake decreased. Working from home was associated with increased intake of vegetables, fruits, dairy products, and snacks but decreased intake of seaweeds, meats, and alcohol. Time spent on childcare was associated with decreased intake of vegetables and fruits but increased intake of meats. Probable depressive symptoms were negatively associated with the frequency of food intake other than snacks and alcohol. We conclude that diet quality improved during the pandemic in general, but attention must be paid to overconsumption of snacks and negative factors such as increased burden of childcare and depression for healthy eating

Preparation and Characterization of Ti 2 0 3 Films Deposited on Sapphire Substrate by Activated Reactive Evaporation Method

SYNOPSIS (OOl)-oriented TiP3 films were epitaxially grown on a (OOl)-face of sapphire single-crystalline substrate by an activated reactive evaporation method. The formation ranges of stoichiometric and nonstoichiometric Ti 2 0 3 films were determined as a function of the substrate temperature (Ts), the oxygen pressure (P0 2 ) and the deposition rate. Stoichiometric Ti 2 0 3 films were grown at Ts6 73K under P02~1.0x1Q-4Torr. which showed the metal-insulator transition with a sharp change in electrical resistivity from 3.5x 10-2 to 2.6 xlO-3 .Qcm at 361K. Nonstoichiometric films prepared under less oxidized conditions did not exhibit the transition. The nonstoichiometry of the Ti 2 0 3 films was discussed in terms of excess Ti ions. IN'IRODUCTION The crystal structure of titanium sesquioxide (TiP3) can be described as a corundum-type structure. The metal-insulator transition in Ti 2 0 3 is a very unique and well-known phenomenon. The intrinsic electrical properties of this oxide causes the transition. I - 3 ) The bulky single-crystal of TiP3 grown by a Czochralski method exhibits the transition at 435K with a sharp decrease in electrical resistivity from 9xlO-3 to3xlO-4 .Qcm on increasing temperature. 4 ) Although Ti 2 0 3 thin films are expected to be useful in a practical view point such as an application to the thermistor in the electric devices, there are few investigations of preparation and physical properties of Ti 2 0 3 thin films. In general. the electrical properties of thin films are sensitive to morphological, crystallographic and chemical properties such as shape. grain size. orientation and stoichiometry of films. These properties depend upon preparation method as well as preparation conditions

Network Dynamics in the 12 Regional Clusters (Japanese)

It has been observed that the origination of innovation tends to concentrate in areas in which environmental conditions are formed as clusters. It is networks with "small-world" architecture that underpin the high level of creative power for innovation that clusters possess. If it were possible, through policy efforts, to form networks of a highly small-world character that provide an environment that can facilitate a good balance between short-distance interaction and long-distance interaction, that would lead to the enhancement of a region's creative power for innovation. The cluster policy currently being implemented has completed its first phase and has reached a watershed at which it moves into the second phase. In this paper we attempt to formulate a method of objectively grasping and evaluating network architecture from the standpoint of these two types of interaction. Specifically, with regard to the architecture of major networks formed domestically, we use network analysis methods to conduct a comparative analysis of the 12 regions and fields before (in 2000) and after (in 2005) the implementation of cluster policy. As a result of this, we have clarified the following points. (1) Networks are expanding in all regions, (2) the networks that excel in long-distance interaction also excel in short-distance interaction, (3) with a small number of exceptions, the bigger the network is, the more both of these characteristics are enhanced, (4) during this five-year period there have been no major changes with regard to the comparative advantage of each region or field, (5) there is some degree of correlation between the independence of modules and the extent of their small-world character, and (6) disparities between regions are greater than disparities between industry sectors. Through the use of this analytical method it was possible to obtain a quantitative grasp of network architecture in a form that made possible comparisons with other regions and fields, and from this to extract objective information necessary for policy-making. We hope that efficient networking activity will be carried out in the future on the basis of the results of analysis of this kind.