Miracle-dz/UniFAR-FTUs huggingface dataset:
Effects of thickness on the piezoelectric and dielectric properties of lead zirconate titanate thin films

Lead zirconate titanate (PZT) thin films with a Zr/Ti ratio of 52/48 were deposited on platinized silicon substrates by a sol-gel method and crystallized with preferred (111) or (100) orientation. Both the piezoelectric properties (d33) and the field-induced strains of the films with different thickness and preferred orientation were measured by a laser Doppler heterodyne interferometer. The weak-field dielectric constants and dissipation factors were also measured as a function of film thickness for comparison with other work reported in the literature. The field-forced polarization switching (P-E) behavior was examined by Sawyer–Tower measurement. Both the piezoelectric properties and the dielectric constants of the PZT thin films were found to be strongly dependent on the film thickness. An increase in the piezoelectric constants and dielectric constants with increasing film thickness was observed for both films with preferred (111) and (100) orientations. Films with (100) preferred orientation were fo.
Probabilistic Model Checking of an Anonymity System

We use the probabilistic model checker PRISM to analyze the Crowds system for anonymous Web browsing. This case study demonstrates how probabilistic model checking techniques can be used to formally analyze security properties of a peer-to-peer group communication system based on random message routing among members. The behavior of group members and the adversary is modeled as a discrete-time Markov chain, and the desired security properties are expressed as PCTL formulas. The PRISM model checker is used to perform automated analysis of the system and verify anonymity guarantees it provides. Our main result is a demonstration of how certain forms of probabilistic anonymity degrade when group size increases or random routing paths are rebuilt, assuming that the corrupt group members are able to identify and/or correlate multiple routing paths originating from the same sender.
Malathion and pyrethroid resistance in Culex quinquefasciatus from Cuba: efficacy of pirimiphos‐methyl in the presence of at least three resistance mechanisms

Abstract. Use of malathion for mosquito control in Cuba for 7 years up to 1986 has selected for elevated non‐specific esterase and altered acetylcholinesterase (AChE) resistance mechanisms in populations of the pest mosquito Culex quinquefasciatus Say. These mechanisms are still present in relatively high frequencies in the Havana area, despite the replacement of malathion by pyrethroid insecticides for the last 3 years in the mosquito control programme.
Development, Function and Evolution of Teeth: Enamel microporosity and its functional implications

Introduction Despite its great hardness and density, enamel has an appreciable porosity. Pore structure affects the mechanical properties of enamel. It also influences the interaction between light and enamel, understanding of which is necessary for development of transillumination techniques for caries detection and for optical matching of restorative materials and tooth tissue. However, interest in enamel porosity has above all been stimulated by the important role played by diffusion of acids and mineral ions in caries formation. Because enamel mineral exists as very small crystals, organised in an elaborate structure, the internal pores are small and variable in form, orientation and distribution. Microscopical information on pore structure tends to be prone to artefact but much information has been obtained by a range of less direct methods. Most studies have employed human or bovine permanent enamel. Pores in relation to enamel structure Average porosity and the state of enamel water Techniques used for estimating the mineral content (and hence porosity) of enamel include quantitative microradiography and measurements of enamel density. Both methods require a knowledge of the density of the apatite crystals of enamel, and in the past it has been assumed that they have the same density as hydroxyapatite (3.15 g/ml). However, recent work (Elliott, 1997), which concluded that enamel apatite has a lower density (2.99 g/ml), suggests that many previous estimates of mineral content may be too low. For instance the much-quoted mineral estimate by Angmar et al . (1963) of 86.2% v/v (based on an apatite density of 3.15) has been revised upwards to 93.1% by Elliott (1997) using an apatite density of 2.99.
The Fastest Saccadic Responses Escape Visual Masking

Object-substitution masking (OSM) occurs when a briefly presented target in a search array is surrounded by small dots that remain visible after the target disappears. The reduction of target visibility occurring after OSM has been suggested to result from a specific interference with reentrant visual processing while the initial feedforward processing is thought to be left intact. We tested a prediction derived from this hypothesis: the fastest responses, being triggered before the beginning of reentrant processing, should escape the OSM interference. In a saccadic choice reaction time task, which gives access to very early stages of visual processing, target visibility was reduced either by OSM, conventional backward masking, or low stimulus contrast. A general reduction of performance was observed in all three conditions. However, the fastest saccades did not show any sign of interference under either OSM or backward masking, as they did under the low-contrast condition. This finding supports the hypothesis that masking interferes mostly with reentrant processing at later stages, while leaving early feedforward processing largely intact.
A Clonogenic Survival Assay of Neural Stem Cells in Rat Spinal Cord after Exposure to Ionizing Radiation

Abstract Lu, F. and Wong, C. S. A Clonogenic Survival Assay of Neural Stem Cells in Rat Spinal Cord after Exposure to Ionizing Radiation. Radiat. Res. 163, 63–71 (2005). Neural stem cells play an important role in neurogenesis of the adult central nervous system (CNS). Inhibition of neurogenesis has been suggested to be an underlying mechanism of radiation-induced CNS damage. Here we developed an in vivo/ in vitro clonogenic assay to characterize the survival of neural stem cells after exposure to ionizing radiation. Cells were isolated from the rat cervical spinal cord and plated as single cell suspensions in defined medium containing epidermal growth factor and basic fibroblast growth factor. The survival of the proliferating cells was determined by their ability to form neurosphere colonies. The number and size of neurospheres were analyzed quantitatively at day 10, 12, 14 and 16 after plating. Plating cells from 5, 10 and 15 mm of the cervical spinal cord resulted in a linear increase in the number of neurospheres from day 10–16. Compared to the nonirradiated spinal cord, there was a significant decrease in the number and size of neurosphere colonies cultured from a 10-mm length of the rat spinal cord after a single dose of 5 Gy. When dissociated neurospheres derived from a spinal cord that had been irradiated with 5 Gy were allowed to differentiate, the percentages of neurons, oligodendrocytes and astrocytes as determined by immunocytohistochemistry were not altered compared to those from the nonirradiated spinal cord. Secondary neurospheres could be obtained from cells dissociated from primary neurospheres that had been cultured from the irradiated spinal cord. In conclusion, exposure to ionizing radiation reduces the clonogenic survival of neural stem cells cultured from the rat spinal cord. However, neural stem cells retain their pluripotent and self-renewing properties after irradiation. A neurosphere-based assay may provide a quantitative measure of the clonogenic survival of neural stem cells in the adult CNS after irradiation.
Components of a Mediterranean diet and their impact on cognitive functions in aging

Background: Adhering to the Mediterranean diet (MeDi) is known to be beneficial with regard to many age-associated diseases including cardiovascular diseases and type 2 diabetes. Recent studies also suggest an impact on cognition and brain structure, and increasing effort is made to track effects down to single nutrients. Aims: We aimed to review whether two MeDi components, i.e., long-chain omega-3 fatty acids (LC-n3-FA) derived from sea-fish, and plant polyphenols including resveratrol (RSV), exert positive effects on brain health in aging. Content: We summarized health benefits associated with the MeDi and evaluated available studies on the effect of (1) fish-consumption and LC-n3-FA supplementation as well as (2) diet-derived or supplementary polyphenols such as RSV, on cognitive performance and brain structure in animal models and human studies. Also, we discussed possible underlying mechanisms. Conclusion: A majority of available studies suggest that consumption of LC-n3-FA with fish or fishoil-supplements exerts positive effects on brain health and cognition in older humans. However, more large-scale randomized controlled trials are needed to draw definite recommendations. Considering polyphenols and RSV, only few controlled studies are available to date, yet the evidence based on animal research and first interventional human trials is promising and warrants further investigation. In addition, the concept of food synergy within the MeDi encourages future trials that evaluate the impact of comprehensive lifestyle patterns to help maintaining cognitive functions into old age.
Exploring Users ’ Attitudes and Intentions toward the Interactive Whiteboard Technology Environment

Interactivity is the key characteristic in interactive whiteboard technology (IWT). This study aims to provide a better understanding of communication behavior in IWT. This research’s objective is to investigate the effects of the interactivity level on a user’s attitude and intention toward the use of IWT. As a result, we cite the technology acceptance model (TAM) to support this research. However, traditional TAM ignores intrinsic motivation, so we introduce perceived self-efficacy as the factor that reflects the user’s intrinsic motivation in IWT tool acceptance. Specifically speaking, our test consisted of system characteristics (interactivity), extrinsic motivation (TAM), and intrinsic motivation (perceived self-efficacy), in an integrated theoretical framework of IWT behavior. Data collected from 350 elementary school students in Taiwan were tested against the extended TAM, using the structural equation modeling approach. The results strongly support the extended TAM in predicting users’ intentions to adopt IWT. Attitude and behavioral intentions are directly/indirectly affected by interactivity, perceived self-efficacy, perceived ease of use, and perceived usefulness. Several implications for IWT acceptance research and management practices are discussed. Copyright © 2010 Praise Worthy Prize S.r. l. All rights reserved.
The association between social network relationships and depressive symptoms among older Americans: what matters most?

ABSTRACT Background: Although social network relationships are linked to mental health in late life, it is still unclear whether it is the structure of social networks or their perceived quality that matters. Methods: The current study regressed a dichotomous 8-item version of the Center for Epidemiological Studies Depression Scale (CESD-8) score on measures of social network relationships among Americans, aged 65–85 years, from the first wave of the National Social Life, Health and Aging Project. The network indicators included a structural variable – social network type – and a series of relationship quality indicators: perceived positive and negative ties with family, friends and spouse/ partner. Multivariate logistic regression analyses controlled for age, gender, education, income, race/ethnicity, religious affiliation, functional health and physical health. Results: The perceived social network quality variables were unrelated to the presence of a high level of depressive symptoms, but social network type maintained an association with this mental health outcome even after controlling for confounders. Respondents embedded in resourceful social network types in terms of social capital – “diverse,” “friend” and “congregant” networks – reported less presence of depressive symptoms, to varying degrees. Conclusions: The results show that the structure of the network seems to matter more than the perceived quality of the ties as an indicator of depressive symptoms. Moreover, the composite network type variable stands out in capturing the differences in mental state. The construct of network type should be incorporated in mental health screening among older people who reside in the community. One's social network type can be an important initial indicator that one is at risk.
Predicting irregular individual movement following frequent mid-level disasters using location data from smartphones

Mid-level disasters that frequently occur, such as typhoons and earthquakes, heavily affect human activities in urban areas by causing severe congestion and economic loss. Predicting the irregular movement of individuals following such disasters is crucial for managing urban systems. Past survey results show that mid-level disasters do not force many individuals to evacuate away from their homes, but do cause irregular movement by significantly delaying the movement timings, resulting in severe congestion in urban transportation. We propose a novel method that predicts such irregularity of individuals' movements in several mid-level disasters using various types of features including the victims' usual movement patterns, disaster information, and geospatial information of victims' locations. Using real GPS data of 1 million people in Tokyo, we show that our method can predict mobility delay with high accuracy,
Circannual variations in intraovarian oocyte but not epididymal sperm quality in the domestic Cat.

Ovaries and testes were collected throughout the year from domestic cats spayed and neutered at local veterinary clinics. Fresh oocytes recovered from minced ovaries were subjected to in vitro maturation and then stained to determine stage of maturation or were inseminated with conspecific sperm. The cauda and corpus regions of each epididymis were dissected into pieces and placed in medium; 30 min later, the epididymal tissue was removed, the medium centrifuged, and the sperm pellet resuspended. Samples were assessed for total sperm count and sperm motility traits, morphology, acrosomal integrity, and ability to penetrate cat oocytes in vitro. Fewer excellent (grade I) oocytes were recovered per ovarian pair during September-November (mean +/- SEM, 19.2 +/- 2.1%) than during January-July (36.8 +/- 3.6%, p < 0.05), while the remaining months had intermediate percentages of grade I oocytes (p > 0.05). A high percentage of oocytes recovered from November-April completed nuclear maturation (64.3 +/- 6.8%), which was different (p < 0.05) from the values for May-July (32.2 +/- 3.8%) and August-October (10.4 +/- 2.9%). Percentage of oocytes with bound sperm was lowest (p < 0.01) in September and October (32.0 +/- 3.1%) compared to February and March (91.4 +/- 1.7%). Percentage of oocytes with sperm within the perivitelline space was highest (p < 0.05) in May-August (33.8 +/- 4.6%) compared to all other months. In contrast, the period of highest (p < 0.01) fertilization (i.e., >/= 4-cell embryo formation) was March-April (51.7 +/- 3.1%) as compared to May-July (17.2 +/- 1.8%) or November-January (12.4 +/- 2.6%). Negligible numbers of oocytes recovered during August-October developed beyond the 2-cell stage (1.1 +/- 0.3%). Blastocyst development from cleaved embryos was highest during February-April (44.3 +/- 2.3%) and lowest during August-October (0.6 +/- 0.1%; p < 0.01). Sperm recovered from the epididymides throughout the year did not differ (p > 0.05) in concentration or in any of the motility, structural, or functional variables evaluated. In summary, cat oocyte nuclear maturation in vitro is depressed during August-October, and the ability to form cleaved embryos remains low even when the capacity to achieve nuclear maturation is relatively high (November-January and May-July). In contrast, male cats are capable of consistently producing viable, progressively motile sperm throughout the year.
Socially Interactive Robots for Real Life Use

Designing interactive mobile robots is a multidisciplinary endeavor that profits from having people interact with robots in different contexts, observing the effects and impacts. To do so, two main issues must be addressed: integrating perceptual and decision-making capabilities in order to interact in meaningful and efficient ways with people, and the ability to move in human settings. This paper describes four robotic platforms demonstrated at the AAAI 2005 Robot Competition, each addressing these issues in their own ways.
Factors affecting mortality caused by falls from height.

BACKGROUND Falls from height are among the most common trauma cases presenting to emergency departments and often cause mortality and morbidity. In the present study, we aimed to determine the factors that effectively reduce mortality caused by falls from height. METHODS Data from 2252 trauma patients who presented to Dicle University Emergency Service between January 2005 and December 2008 due to falling from height in the Southeastern Anatolia region were retrospectively analyzed. We analyzed the parameters that are considered to have a positive effect on mortality, which included the following: month of fall; age; gender; etiology; place of fall; type of ground on which the patient fell; height of fall; intubation; hypotension; tachycardia; neck, head, thoracal, abdominal, pelvic, and extremity injuries; Glasgow Coma Score (GCS); Injury Severity Score (ISS); and Revised Trauma Score (RTS). RESULTS There were 1435 males (63.7%) and 817 females (36.3%) included in the study. Two thousand thirty-one (94.6%) patients survived the fall while 121(5.4%) died. The mean age of the surviving patients was 15.55±18.60 years, while the patients who died had a mean age of 29.59±28.93 years. The mean height of the fall of the survivors' was 3.09 meters, and the mean height of the fall for those that died was 6.61±5.73 meters (p<0.001). CONCLUSION The mean fatal height of the fall in falls from height is 6.61 m. Age, attempted suicide, height of fall, type of ground on which the patient fell, place of fall, and head, thoracic, and abdominal trauma are the primary factors affecting mortality caused by falls from height.
Endoplasmic spreading requires coalescence of vimentin intermediate filaments at force-bearing adhesions

Interaction of vimentin filaments (vIFs) and force-bearing adhesions is essential for endoplasm spreading. For adhesions to be connected to a contractile network involved in endoplasm spreading, vIFs are needed. Thus endoplasm spreading and microtubule stabilization in the periphery require a multicomponent actin network anchored at adhesions.
Functional expression on bacteriophage of the mustard trypsin inhibitor MTI-2.

The mustard trypsin inhibitor MTI-2 is a potential tool in the study of interactions between pest insects and plants. It can be applied to study the adaptations of digestive proteases in pest insects. Phage display allows a rapid and exhaustive system for the selection of heterologous protein variants with novel specificities. Here we describe a bacteriophage expression system which permits functional expression of MTI-2 variants. Active and inactive mutants of MTI-2 are constructed and displayed on phage. These are used to demonstrate that an active variant can be selected from a background of 10,000 inactive mutants in four rounds of selection and amplification.
Ten days of exercise training reduces glucose production and utilization during moderate-intensity exercise.

We have previously shown that 12 wk of endurance training reduces the rate of glucose appearance (Ra) during submaximal exercise (Coggan, A. R., W. M. Kohrt, R. J. Spina, D. M. Bier, and J. O. Holloszy. J. Appl. Physiol. 68: 990-996, 1990). The purpose of the present study was to examine the time course of and relationship between training-induced alterations in glucose kinetics and endocrine responses during prolonged exercise. Accordingly, seven men were studied during 2 h of cycle ergometer exercise at approximately 60% of pretraining peak oxygen uptake on three occasions: before, after 10 days, and after 12 wk of endurance training. Ra was determined using a primed, continuous infusion of [6,6-2H]glucose. Ten days of training reduced mean Ra during exercise from 36.9 +/- 3.3 (SE) to 28.5 +/- 3.4 mumol.min-1.kg-1 (P < 0.001). Exercise-induced changes in insulin, C-peptide, glucagon, norepinephrine, and epinephrine were also significantly blunted. After 12 wk of training, Ra during exercise was further reduced to 21.5 +/- 3.1 mumol.min-1.kg-1 (P < 0.001 vs. 10 days), but hormone concentrations were not significantly different from 10-day values. The lower glucose Ra during exercise after short-term (10 days) training is accompanied by, and may be due to, altered plasma concentrations of the major glucoregulatory hormones. However, other adaptations must be responsible for the further reduction in Ra with more prolonged training.
Antibodies to the conserved cytoplasmic domain of the integrin beta 1 subunit react with proteins in vertebrates, invertebrates, and fungi

The integrin family of cell surface receptors can be divided into three groups on the basis of their homologous beta subunits: beta 1, beta 2, and beta 3. We have raised an antibody against a synthetic peptide corresponding to the COOH-terminal domain of the chicken integrin beta 1 subunit that reacts with beta subunits from a variety of vertebrates, invertebrates, and fungi, demonstrating strong evolutionary conservation of sequences in this domain. In Drosophila cells, the antibody recognizes integrin alpha beta complexes that appear to be identical with position-specific antigens. Cross-reactive proteins are also detected in Caenorhabditis elegans and Candida albicans. The antiserum is specific for beta 1 subunits and does not recognize other integrin beta subunits in humans. In immunofluorescence analyses of cultured cells, the antibody reacts only with permeabilized cells confirming that this highly conserved COOH-terminal segment is a cytoplasmic domain.