The effect of character stroke width on legibility: The relationship between duty ratio and contrast threshold.

Stroke width is an important factor affecting letter legibility. Although there seems to be a critical or optimal value for stroke width, it has been difficult to estimate quantitatively because shape deterioration and the increase of stroke width are covariates. This study attempted to predict the optimal value of stroke width considering it as a duty ratio.

Polyploid progeny from triploid hybrids of Phegopteris decursivepinnata (Thelypteridaceae).

Phegopteris decursivepinnata includes diploids, tetraploids, and triploid hybrids based on x = 30. We obtained polyploid progeny from triploid hybrids through selfing and crossing experiments. Triploids occasionally formed well-filled spores.

Do you feel happy when other members look happy? Moderating effect of community-level social capital on interconnection of happiness.

One's happiness is expected to be affected by the happiness of surrounding others. This socio-psychological nature of happiness, however, has not been fully examined in the literature of social psychology. The current study examined if this "psychological interconnection of happiness" occurs when (i) individuals have strong personal social capital and/or (ii) individuals belong to a community where other members have strong social capital.

Unresolvable Pixels Contribute to Character Legibility: Another Reason Why High-Resolution Images Appear Clearer.

This study examined the effect of character sample density on legibility. As the spatial frequency component important for character recognition is said to be 1 to 3 cycles/letter (cpl), six dots in each direction should be sufficient to represent a character; however, some studies have reported that high-density characters are more legible. Considering that these seemingly contradictory findings could be compatible, we analyzed the frequency component of the character stimulus with adjusted sample density and found that the component content of 1 to 3 cpl increased in the high-density character.

Evolutionary game in an androdioecious population: Coupling of outcrossing and male production.

Androdioecy, the coexistence of hermaphrodites and males, is very rare in vertebrates but occurs in mangrove killifish living in ephemeral or unstable habitats. Hermaphrodites reproduce both by outcrossing with males and by selfing. Outbreeding is advantageous because of inbreeding depression, but it requires encounters with males.

Analysis and synthesis of a growing network model generating dense scale-free networks via category theory.

We propose a growing network model that can generate dense scale-free networks with an almost neutral degree-degree correlation and a negative scaling of local clustering coefficient. The model is obtained by modifying an existing model in the literature that can also generate dense scale-free networks but with a different higher-order network structure. The modification is mediated by category theory.

Improvement of Low Luminance Visual Acuity in Patients with Chronic Central Serous Chorioretinopathy after Half-Dose Verteporfin Photodynamic Therapy.

Patients with central serous chorioretinopathy (CSC) often complain of visual difficulties under low luminance conditions. In this study, we evaluated low luminance visual acuity (LLVA) after half-dose verteporfin photodynamic therapy (hdPDT) in eyes with CSC. The study included eight eyes of eight patients with chronic CSC that underwent hdPDT.

Optimal control of root nodulation - Prediction of life history theory of a mutualistic system.

Legumes produce root nodules containing symbiotic rhizobial bacteria that convert atmospheric molecular nitrogen into ammonia or related nitrogenous compounds. The host plant supplies photosynthetic products to root nodules forming a mutualistic system. Legumes have physiological mechanisms for regulating nodule production with chemical signals produced in leaves, called the autoregulation of nodulation.

Rigorous Lower Bounds for the Ground State Energy of Molecules by Employing Necessary N-Representability Conditions.

Electronic structure calculations, in particular the computation of the ground state energy, lead to challenging problems in optimization. These problems are of enormous importance in quantum chemistry for calculations of properties of solids and molecules. Minimization methods for computing the ground state energy can be developed by employing a variational approach, where the second-order reduced density matrix defines the variable.

Enhanced risk of cancer in companion animals as a response to the longevity.

Cancer is caused by the lifetime accumulation of multiple somatic deformations of the genome and epigenome. At a very low rate, mistakes occur during genomic replication (e.g.

Tunneling matrix element and tunneling pathways of protein electron transfer calculated with a fragment molecular orbital method.

Practical ways to calculate the tunneling matrix elements and analyze the tunneling pathways for protein electron-transfer (ET) reactions with a fragment molecular orbital (FMO) method are presented. The straightforward use of minimal basis sets only for the atoms involved in the covalent bond detachment in FMO can properly describe the ETs through the protein main-chains with the cost-effective two-body corrections (FMO2) without losing the quality of double-zeta basis sets. The current FMO codes have been interfaced with density functional theory, polarizable continuum model, and model core potentials, with which the FMO-based protein ET calculations can consider the effects of electron correlation, solvation, and transition-metal redox centers.

Emotion expression and regulation in three cultures: Chinese, Japanese, and American preschoolers' reactions to disappointment.

There are strong cultural norms for how emotions are expressed, yet little is known about cultural variations in preschoolers' outward displays and regulation of disappointment. Chinese, Japanese, and American preschoolers' (N = 150) displays of emotion to an undesired gift were coded across both social and nonsocial contexts in a "disappointing gift" paradigm. Generalized estimating equations revealed that, regardless of culture, when children received a disappointing gift, they showed more positive expressions of emotion ("fake smile") in social contexts (in the presence of unfamiliar and familiar examiners) relative to when they were alone, suggesting that preschool-aged children are able to mask their disappointment with positive displays.

Cultural and life style practices associated with low inflammatory physiology in Japanese adults.

Japan is an exceptionally healthy East Asian country with extended longevity. In addition, the typical levels of several proinflammatory proteins, including both C-reactive protein (CRP) and interleukin-6 (IL-6), are often reported to be low when compared to American and European populations. This analysis determined if blood levels of CRP and IL-6 were associated with 4 cultural practices reflective of Japanese behavior and customs -- drinking tea, eating seafood, consuming vegetables, and partaking in relaxing baths regularly - among 382 adults living in Tokyo.

Audiovisual emotion perception develops differently from audiovisual phoneme perception during childhood.

This study investigated the developmental paths in the use of audiovisual information for the perception of emotions and phonemes by Japanese speakers. Children aged 5 to 12 years and adults aged 30 to 39 years engaged in an emotion perception task in which speakers expressed their emotions through their faces and voices, and a phoneme perception task using phonemic information in speakers' lip movements and speech sounds. Results indicated that Japanese children's judgement of emotions by using auditory information increased with increasing age, whereas the use of audiovisual information for judging phonemes remained constant with increasing age.

Single-electron quantum dynamics in high-harmonic generation spectrum from LiH molecule: Analysis of potential energy surfaces for electrons constructed from a model of localized Gaussian wave packets with valence-bond spin-coupling.

A high-harmonic generation (HHG) spectrum from a LiH molecule induced by an intense laser pulse is computed and analyzed with potential energy surfaces for electron motion (ePES) constructed from a model of localized electron wave packets with valence-bond spin-coupling. The molecule has two valence ePES with binding energies of 0.39 hartree and 1.

1α, 25(OH)D regulates agrin-induced acetylcholine receptor clustering through upregulation of rapsyn expression in C2C12 myotubes.

The active form of vitamin D (1α, 25-dihydroxyvitamin D [1α, 25(OH)D], referred to as 1,25D) has been suggested to play a pivotal role in skeletal muscle function and metabolism. However, the mechanisms through which 1,25D functions in this tissue remain to be elucidated. Recent studies have shown that vitamin D signaling regulates neuromuscular maintenance and improves locomotion in mice.

Optimal short-term memory before the edge of chaos in driven random recurrent networks.

The ability of discrete-time nonlinear recurrent neural networks to store time-varying small input signals is investigated with mean-field theory. The combination of a small input strength and mean-field assumptions makes it possible to derive an approximate expression for the conditional probability density of the state of a neuron given a past input signal. From this conditional probability density, we can analytically calculate short-term memory measures, such as memory capacity, mutual information, and Fisher information, and determine the relationships among these measures, which have not been clarified to date to the best of our knowledge.

Age-Related Trends in the Prevalence of Type 2 Diabetes among Japanese and White and Black American Adults.

Aim: To compare the prevalence of poor glycemic control in probability samples of Japanese and American adults, and to determine the association with their somatic phenotypes.

Material And Methods: Blood samples and anthropometric measures were obtained from 382 Japanese, 32-79 years of age, randomly selected to reflect the 23 wards of Tokyo. HA1c values were compared to 1215 Americans, 35-86 years of age, from a national study across the 48 continental states, along with an over-sampling of African-Americans from one city (www.

Effects of luminance contrast and character size on reading speed.

Both luminance contrast and character size are critical factors affecting reading performance. Previous studies reported on the effect of luminance contrast on the reading-speed function, that is, the relationship between reading speed and character size. In particular, when contrast was reduced, the critical print size (CPS) was found to shift to a larger character size even though the maximum reading speed and function shape did not change [Japanese Journal of Ophthalmology 52(1) (2008) 44-47].

Neural signatures of child cognitive emotion regulation are bolstered by parental social regulation in two cultures.

Caregiver impact on the efficacy of cognitive emotion regulation (ER; i.e. reappraisal) during childhood is poorly understood, particularly across cultures.

How do socio-ecological factors shape culture? Understanding the process of micro-macro interactions.

Socio-ecological environments produce certain psychological functions. that are adaptive for survival in each environment. Past evidence suggests that interdependence-related psychological features are prevalent in East Asian cultures partly due to the history of 'rice-crop farming' (versus herding) in those areas.

Influence of Multiple Types of Proximity on the Degree of Visual Crowding Effects Within a Single Gap Detection Task.

The visual system cannot recognize an object (target) in peripheral vision when presented with neighboring similar stimuli (flanker). This object recognition disability is known as crowding. Studies have shown that various types of proximity, such as spatial distance or semantic category, affect the degree of crowding.

Ordinal Preferential Attachment: A Self-Organizing Principle Generating Dense Scale-Free Networks.

Networks are useful representations for analyzing and modeling real-world complex systems. They are often both scale-free and dense: their degree distribution follows a power-law and their average degree grows over time. So far, it has been argued that producing such networks is difficult without externally imposing a suitable cutoff for the scale-free regime.

New criteria of burst suppression on electroencephalogram in dogs anesthetized with sevoflurane.

Burst suppression on electroencephalogram (EEG) is defined as suppression periods longer than 0.5 s during which the amplitude does not exceed 5 μV in human. The aims of this study were; 1) an attempt of creating new criteria of burst suppression in dogs; and 2) a survey on accuracy of sub-parameter of Bispectral index (BIS).