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https://www.readbyqxmd.com/read/28103557/data-dependent-label-distribution-learning-for-age-estimation
#1
Zhouzhou He, Xi Li, Zhongfei Zhang, Fei Wu, Xin Geng, Yaqing Zhang, Ming-Hsuan Yang, Yueting Zhuang
As an important and challenging problem in computer vision, face age estimation is typically cast as a classification or regression problem over a set of face samples with respect to several ordinal age labels, which have intrinsically cross-age correlations across adjacent age dimensions. As a result, such correlations usually lead to the age label ambiguities of the face samples. Namely, each face sample is associated with a latent label distribution that encodes the cross-age correlation information on label ambiguities...
January 18, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28103541/playing-with-senses-in-vr-alternate-perceptions-combining-vision-and-touch
#2
Anatole Lecuyer
Virtual reality is an immersive experience based on computer-generated stimulations perceived with multiple sensory channels. It is possible to manipulate these sensory stimulations independently and create conflicting situations in which, for instance, vision and touch are spatially and/or temporally inconsistent. This article discusses how to exploit these ambiguous sensorial situations to generate new kinds of percept using three types of examples: pseudo-haptic effects, self-motion sensations, and body-ownership illusions...
January 2017: IEEE Computer Graphics and Applications
https://www.readbyqxmd.com/read/28103190/learning-supervised-topic-models-for-classification-and-regression-from-crowds
#3
Filipe Rodrigues, Mariana Lourenco, Bernardete Ribeiro, Francisco Pereira
The growing need to analyze large collections of documents has led to great developments in topic modeling. Since documents are frequently associated with other related variables, such as labels or ratings, much interest has been placed on supervised topic models. However, the nature of most annotation tasks, prone to ambiguity and noise, often with high volumes of documents, deem learning under a single-annotator assumption unrealistic or unpractical for most real-world applications. In this article, we propose two supervised topic models, one for classification and another for regression problems, which account for the heterogeneity and biases among different annotators that are encountered in practice when learning from crowds...
January 5, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28103189/dynamic-programming-for-instance-annotation-in-multi-instance-multi-label-learning
#4
Anh Pham, Raviv Raich, Xiaoli Fern
Labeling data for classification requires significant human effort. To reduce labeling cost, instead of labeling every instance, a group of instances (bag) is labeled by a single bag label. Computer algorithms are then used to infer the label for each instance in a bag, a process referred to as instance annotation. This task is challenging due to the ambiguity regarding the instance labels. We propose a discriminative probabilistic model for the instance annotation problem and introduce an expectation maximization framework for inference, based on the maximum likelihood approach...
January 5, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28102911/glutathione-peroxidase-like-enzymes-cover-five-distinct-cell-compartments-and-membrane-surfaces-in-arabidopsis-thaliana
#5
Safira Attacha, David Solbach, Krisztina Bela, Anna Moseler, Stephan Wagner, Markus Schwarzländer, Isabel Aller, Stefanie J Müller, Andreas J Meyer
Glutathione peroxidase-like enzymes (GPXLs) constitute a family of eight peroxidases in Arabidopsis thaliana. In contrast to the eponymous selenocysteine glutathione peroxidases (GPXs) in mammalian cells which use glutathione as electron donor, GPXLs rely on cysteine instead of selenocysteine for activity and depend on the thioredoxin system for reduction. Although plant GPXLs have been implicated in important agronomic traits such as drought tolerance, photooxidative tolerance and immune responses there remain major ambiguities regarding their subcellular localization...
January 19, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28102792/a-study-exploring-the-protean-responses-of-nurses-transitioning-to-primary-healthcare
#6
Christine Ashley, Elizabeth Halcomb, Angela Brown
Background Healthcare systems are faced with changing community health profiles and ageing populations. Together with economic considerations, these factors have influenced the increase in provision of care in primary rather than other healthcare settings. Many nurses are electing to move from acute care to meet demands for a skilled primary healthcare workforce. However, little is reported about these nurses' experiences of transition. Aim To describe how role theory provides a theoretical framework to inform the design of a mixed-methods study exploring the transition of acute care nurses to roles in primary health care...
January 23, 2017: Nurse Researcher
https://www.readbyqxmd.com/read/28102034/common-and-well-documented-hla-alleles-over-all-of-europe-and-within-european-sub-regions-a-catalogue-from-the-european-federation-for-immunogenetics
#7
A Sanchez-Mazas, J M Nunes, D Middleton, J Sauter, S Buhler, A McCabe, J Hofmann, D M Baier, A H Schmidt, G Nicoloso, M Andreani, Z Grubic, J-M Tiercy, K Fleischhauer
BACKGROUND: A catalogue of common and well-documented (CWD) human leukocyte antigen (HLA), previously established by the American Society for Histocompatibility and Immunogenetics (ASHI), is widely used as indicator for typing ambiguities to be resolved in tissue transplantation or for checking the universality of any HLA allele in the world. However, European population samples, which are characterized by a substantial level of genetic variation, are underrepresented in the ASHI catalogue...
February 2017: HLA
https://www.readbyqxmd.com/read/28100080/the-commercialization-of-genome-editing-technologies
#8
Katelyn Brinegar, Ali K Yetisen, Sun Choi, Emily Vallillo, Guillermo U Ruiz-Esparza, Anand M Prabhakar, Ali Khademhosseini, Seok-Hyun Yun
The emergence of new gene-editing technologies is profoundly transforming human therapeutics, agriculture, and industrial biotechnology. Advances in clustered regularly interspaced short palindromic repeats (CRISPR) have created a fertile environment for mass-scale manufacturing of cost-effective products ranging from basic research to translational medicine. In our analyses, we evaluated the patent landscape of gene-editing technologies and found that in comparison to earlier gene-editing techniques, CRISPR has gained significant traction and this has established dominance...
January 18, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28099486/do-thai-physicians-recommend-seasonal-influenza-vaccines-to-pregnant-women-a-cross-sectional-survey-of-physicians-perspectives-and-practices-in-thailand
#9
Prabda Praphasiri, Darunee Ditsungneon, Adena Greenbaum, Fatimah S Dawood, Pornsak Yoocharoen, Deborah M Stone, Sonja J Olsen, Kim A Lindblade, Charung Muangchana
BACKGROUND: Physicians play a major role in influencing acceptance and uptake of vaccines. However, little is known about physicians' perspectives on influenza vaccination of pregnant women in Thailand, for whom vaccine coverage is estimated at <1%. METHOD: In 2013, a self-administered questionnaire on physicians' perceptions, attitudes and practices related to influenza vaccination for pregnant women was distributed to 1,134 hospitals with an antenatal care clinic (ANC) in Thailand...
2017: PloS One
https://www.readbyqxmd.com/read/28098227/adolescents-display-distinctive-tolerance-to-ambiguity-and-to-uncertainty-during-risky-decision-making
#10
Wouter van den Bos, Ralph Hertwig
Although actuarial data indicate that risk-taking behavior peaks in adolescence, laboratory evidence for this developmental spike remains scarce. One possible explanation for this incongruity is that in the real world adolescents often have only vague information about the potential consequences of their behavior and the likelihoods of those consequences, whereas in the lab these are often clearly stated. How do adolescents behave under such more realistic conditions of ambiguity and uncertainty? We asked 105 participants aged from 8 to 22 years to make three types of choices: (1) choices between options whose possible outcomes and probabilities were fully described (choices under risk); (2) choices between options whose possible outcomes were described but whose probability information was incomplete (choices under ambiguity), and (3) choices between unknown options whose possible outcomes and probabilities could be explored (choices under uncertainty)...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097772/laser-irradiation-induced-melting-and-reduction-reaction-for-the-formation-of-pt-based-bimetallic-alloy-particles-in-liquids
#11
Changhao Liang, Shouliang Wu, Enmei Dai, Yixing Ye, Jun Liu, Zhenfei Tian, Yunyu Cai, Xiaoguang Zhu, Yechuang Han
Laser melting in liquids (LML) is one of the most effective methods to prepare bimetallic alloys, the formation process of which is always research focus but still ambiguous. In this paper, we prepared two types of Pt-based bimetallic alloys by LML, including Pt-Au alloys and Pt-iron group metal (iM = Fe/Co/Ni) alloys, and investigated the corresponding mechanisms of alloying process. Detailed component and structural characterizations indicate that laser irradiation induced a quite rapid formation process (not exceed 10 s) of Pt-Au alloy nanospheres, and the crystalline structures of Pt-Au alloys is determined by the monometallic constituents with higher content...
January 18, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28097738/enhanced-predictive-signalling-in-schizophrenia
#12
Katharina Schmack, Marcus Rothkirch, Josef Priller, Philipp Sterzer
Positive symptoms of schizophrenia such as delusions and hallucinations are thought to arise from an alteration in predictive mechanisms of the brain. Here, we empirically tested the hypothesis that schizophrenia is associated with an enhanced signalling of higher-level predictions that shape perception into conformity with acquired beliefs. Twenty-one patients with schizophrenia and twenty-eight healthy controls matched for age and gender took part in a functional magnetic resonance imaging (fMRI) experiment that assessed the effect of an experimental manipulation of cognitive beliefs on the perception of an ambiguous visual motion stimulus...
January 18, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28097505/support-for-context-effects-on-segmentation-and-segments-depends-on-the-context
#13
Christopher C Heffner, Rochelle S Newman, William J Idsardi
Listeners must adapt to differences in speech rate across talkers and situations. Speech rate adaptation effects are strong for adjacent syllables (i.e., proximal syllables). For studies that have assessed adaptation effects on speech rate information more than one syllable removed from a point of ambiguity in speech (i.e., distal syllables), the difference in strength between different types of ambiguity is stark. Studies of word segmentation have shown large shifts in perception as a result of distal rate manipulations, while studies of segmental perception have shown only weak, or even nonexistent, effects...
January 17, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28097215/an-ambiguity-principle-for-assigning-protein-structural-domains
#14
Guillaume Postic, Yassine Ghouzam, Romain Chebrek, Jean-Christophe Gelly
Ambiguity is the quality of being open to several interpretations. For an image, it arises when the contained elements can be delimited in two or more distinct ways, which may cause confusion. We postulate that it also applies to the analysis of protein three-dimensional structure, which consists in dividing the molecule into subunits called domains. Because different definitions of what constitutes a domain can be used to partition a given structure, the same protein may have different but equally valid domain annotations...
January 2017: Science Advances
https://www.readbyqxmd.com/read/28095376/review-of-decision-making-in-game-tasks-in-elderly-participants-with-alzheimer-disease-and-mild-cognitive-impairment
#15
Alaise Silva Santos de Siqueira, Juliana Emy Yokomizo, Wilson Jacob-Filho, Mônica Sanches Yassuda, Ivan Aprahamian
BACKGROUND: Changes in decision-making (DM) have recently been investigated in patients with Alzheimer disease (AD) or mild cognitive impairment (MCI). DM is highly relevant to everyday functioning and autonomy. It relies on several cognitive abilities, such as semantic and episodic memory, as well as aspects of executive functioning. We conducted a systematic review of DM in older adults with MCI and AD. SUMMARY: Only 5 studies whose main objective was to evaluate the DM performance were selected...
January 18, 2017: Dementia and Geriatric Cognitive Disorders
https://www.readbyqxmd.com/read/28095316/rewiring-protein-synthesis-from-natural-to-synthetic-amino-acids
#16
REVIEW
Yongqiang Fan, Christopher R Evans, Jiqiang Ling
BACKGROUND: The protein synthesis machinery uses 22 natural amino acids as building blocks that faithfully decode the genetic information. Such fidelity is controlled at multiple steps and can be compromised in nature and in the laboratory to rewire protein synthesis with natural and synthetic amino acids. SCOPE OF REVIEW: This review summarizes the major quality control mechanisms during protein synthesis, including aminoacyl-tRNA synthetases, elongation factors, and the ribosome...
January 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28095030/green-tea-consumption-and-the-risk-of-liver-cancer-a-meta-analysis
#17
Chen-Xu Ni, Hong Gong, Ying Liu, Yang Qi, Chun-Lei Jiang, Jun-Ping Zhang
Green tea is a commonly consumed beverage in Asia and has been suggested to have anticarcinogenic properties. To date, epidemiological evidence of the effect of green tea consumption on liver cancer risk remains ambiguous. The aim of this meta-analysis is to evaluate the association between green tea consumption and the risk of liver cancer. The summary relative risk for the highest consumption (≥5 cups/day) of green tea on liver cancer incidence compared with nondrinkers was 0.62 (95% confidence interval: 0...
January 17, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28095013/the-tipping-point-of-perceived-change-asymmetric-thresholds-in-diagnosing-improvement-versus-decline
#18
Ed O'Brien, Nadav Klein
Change often emerges from a series of small doses. For example, a person may conclude that a happy relationship has eroded not from 1 obvious fight but from smaller unhappy signs that at some point "add up." Everyday fluctuations therefore create ambiguity about when they reflect substantive shifts versus mere noise. Ten studies reveal an asymmetry in this first point when people conclude "official" change: people demand less evidence to diagnose lasting decline than lasting improvement, despite similar evidential quality...
February 2017: Journal of Personality and Social Psychology
https://www.readbyqxmd.com/read/28095012/how-our-own-speech-rate-influences-our-perception-of-others
#19
Hans Rutger Bosker
In conversation, our own speech and that of others follow each other in rapid succession. Effects of the surrounding context on speech perception are well documented but, despite the ubiquity of the sound of our own voice, it is unknown whether our own speech also influences our perception of other talkers. This study investigated context effects induced by our own speech through 6 experiments, specifically targeting rate normalization (i.e., perceiving phonetic segments relative to surrounding speech rate)...
January 16, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28094587/applying-theories-to-better-understand-socio-political-challenges-in-implementing-evidence-based-work-disability-prevention-strategies
#20
Christian Ståhl, Katia Costa-Black, Patrick Loisel
PURPOSE: This article explores and applies theories for analyzing socio-political aspects of implementation of work disability prevention (WDP) strategies. METHOD: For the analysis, theories from political science are explained and discussed in relation to case examples from three jurisdictions (Sweden, Brazil and Québec). RESULTS: Implementation of WDP strategies may be studied through a conceptual framework that targets: (1) the institutional system in which policy-makers and other stakeholders reside; (2) the ambiguity and conflicts regarding what to do and how to do it; (3) the bounded rationality, path dependency and social systems of different stakeholders; and (4) coalitions formed by different stakeholders and power relations between them...
January 17, 2017: Disability and Rehabilitation
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