Gated Convolutional Bidirectional Attention-based Model for Off-topic Spoken Response Detection

Off-topic spoken response detection, the task aiming at predicting whether a response is off-topic for the corresponding prompt, is important for an automated speaking assessment system. In many real-world educational applications, off-topic spoken response detectors are required to achieve high recall for off-topic responses not only on seen prompts but also on prompts that are unseen during training. In this paper, we propose a novel approach for off-topic spoken response detection with high off-topic recall on both seen and unseen prompts. We introduce a new model, Gated Convolutional Bidirectional Attention-based Model (GCBiA), which applies bi-attention mechanism and convolutions to extract topic words of prompts and key-phrases of responses, and introduces gated unit and residual connections between major layers to better represent the relevance of responses and prompts. Moreover, a new negative sampling method is proposed to augment training data. Experiment results demonstrate that our novel approach can achieve significant improvements in detecting off-topic responses with extremely high on-topic recall, for both seen and unseen prompts.Comment: ACL2020 long pape

Generativity and the contribution of services among older adults in Taiwan

This study aims to analysis the relationship between generativity and contribution services. Erikson (1997) pointed out in his Psychosocial Developmental Theory that if an individual was lack of active participation while progressing from stage 7 to stage 8, the individual will tend to be in despair, getting pessimistic. This will eventually cause the individual fail to achieve self-identity. Moreover, Schoklitsch and Baumann (2011) emphasized that generativity is an essential factor to maintain psychological health in old ages. This theory had been approved by Baltes and Baltes (1990) that they regarded generativity and wisdom as the best portrayal of the old age life. It can be seen that generativity is indeed an important study issue in the field of gerontology. In addition, older adults have contributive needs, according to McClusky’s (1971) Margin Theory of Needs. Older adults wanted to give a helping hand to the society. They hoped that both their contribution and themselves will be valued and appreciated. Through their devotion, they wished they could change public’s stereotype of older adults. To be concrete, the purpose of this study is as follows: to understand the relationship between generativity and the contribution of services; to analyze the characteristics, actions and influential factors of generativity; to explore motivations behind, effectiveness of, and influences on the contribution of services. In order to achieve above purposes, this study adopted questionnaire survey method

Solar system tests for realistic f(T)f(T) models with nonminimal torsion-matter coupling

In the previous paper, we have constructed two $f(T)$ models with nonminimal torsion-matter coupling extension, which are successful in describing the evolution history of the Universe including the radiation-dominated era, the matter-dominated era, and the present accelerating expansion. Meantime, the significant advantage of these models is that they could avoid the cosmological constant problem of $\Lambda$CDM. However, the nonminimal coupling between matter and torsion will affect the tests of Solar system. In this paper, we study the effects of Solar system in these models, including the gravitation redshift, geodetic effect and perihelion preccesion. We find that Model I can pass all three of the Solar system tests. For Model II, the parameter is constrained by the measure of the perihelion precession of Mercury.Comment: 10 page

5-Methyl-3,3-bis­(4-methyl­piperazin-1-yl)-1-[2-(4-methyl­piperazin-1-yl)eth­yl]indolin-2-one

In the title compound, C26H43N7O, each piperazine ring adopts a chair conformation. Two 1-methyl­piperazine rings bond to one Csp 3 of the pyrrole ring via the piperazine N atoms, while the third one links to the N atom of the indolin-2-one unit through a flexible ethyl group with an almost syn conformation. In the crystal, mol­ecules are connected through methyl­ene–carbonyl C—H⋯O inter­actions into an infinite chain along the c axis. The almost parallel arrays are stacked, forming a three-dimensional framework