Wrapper Maintenance: A Machine Learning Approach

The proliferation of online information sources has led to an increased use of wrappers for extracting data from Web sources. While most of the previous research has focused on quick and efficient generation of wrappers, the development of tools for wrapper maintenance has received less attention. This is an important research problem because Web sources often change in ways that prevent the wrappers from extracting data correctly. We present an efficient algorithm that learns structural information about data from positive examples alone. We describe how this information can be used for two wrapper maintenance applications: wrapper verification and reinduction. The wrapper verification system detects when a wrapper is not extracting correct data, usually because the Web source has changed its format. The reinduction algorithm automatically recovers from changes in the Web source by identifying data on Web pages so that a new wrapper may be generated for this source. To validate our approach, we monitored 27 wrappers over a period of a year. The verification algorithm correctly discovered 35 of the 37 wrapper changes, and made 16 mistakes, resulting in precision of 0.73 and recall of 0.95. We validated the reinduction algorithm on ten Web sources. We were able to successfully reinduce the wrappers, obtaining precision and recall values of 0.90 and 0.80 on the data extraction task

Active Learning with Multiple Views

Active learners alleviate the burden of labeling large amounts of data by detecting and asking the user to label only the most informative examples in the domain. We focus here on active learning for multi-view domains, in which there are several disjoint subsets of features (views), each of which is sufficient to learn the target concept. In this paper we make several contributions. First, we introduce Co-Testing, which is the first approach to multi-view active learning. Second, we extend the multi-view learning framework by also exploiting weak views, which are adequate only for learning a concept that is more general/specific than the target concept. Finally, we empirically show that Co-Testing outperforms existing active learners on a variety of real world domains such as wrapper induction, Web page classification, advertisement removal, and discourse tree parsing

Expanding the Role of Social Class in Multicultural Counselor Education Curricula

Although professional counselors are called to develop Multicultural and Social Justice Counseling Competencies (MSJCC; Ratts et al., 2016), and social and cultural diversity are highly researched (e.g., Barrio Minton et al., 2014), social class as a multicultural construct has received less attention and is often reduced to being defined as socioeconomic status (SES). Therefore, this article provides a brief historical context of social class, explores the current state of social class research in counseling and counselor education, and suggests methods for increasing inclusion of social class in counselor educators’ multicultural pedagogy

Gas-Surface Dynamics and Profile Evolution during Etching of Silicon

Scattering of energetic F atoms on a fluorinated Si surface is studied by molecular beam methods. The energy transfer closely follows hard-sphere collision kinematics. Energy and angular distributions of unreacted F atoms suggest significant multiple-bounce scattering in addition to single-bounce scattering and trapping desorption. An empirical model of the atom-surface interaction dynamics is used in a Monte Carlo simulation of topography evolution during neutral beam etching of Si. Model predictions of profile phenomena are validated by experiments

Anti-Racist Considerations for Teaching CACREP Assessment and Diagnosis Courses

Professional counselors must act as anti-racist social justice advocates throughout the counseling relationship, including assessment, diagnosis, and treatment planning. Due to internalized racism and inappropriate instruments, assessment and diagnosis are two critical areas where marginalized populations have historically experienced misdiagnosis and pathologizing impacting overall client care and wellbeing. Inappropriate instruments, inadequate training, and counselor bias have profound impacts on access to treatment and resources for individuals holding marginalized racial identities. Although the call for anti-racist counseling is clear, the profession is still unclear on how to teach these concepts to counselor trainees. Counselor educators must be intentional about incorporating anti-racist concepts into all counseling courses including assessment and diagnosis. Situated by the historical context of racism within helping professions, we aim to provide practical teaching implications for infusing anti-racist content into assessment and diagnosis courses in counselor education

An investigation of the degradation of Fluorinated Ethylene Propylene (FEP) copolymer thermal blanketing materials aboard LDEF in the laboratory

Samples of fluorinated ethylene propylene copolymer thermal blanketing material, recovered from the Long Duration Exposure Facility (LDEF), were investigated to determine the nature and the extent of degradation due to exposure to the low-Earth-orbit environment. Samples recovered from the ram-facing direction of LDEF, which received vacuum-ultraviolet (VUV) radiation and atomic-oxygen impingement, and samples from the trailing edge, which received almost exclusively VUV exposure, were investigated by scanning electron microscopy and atomic force microscopy. The most significant result of this investigation was found on samples that received only VUV exposure. These samples possessed a hard, embrittled surface layer that was absent from the atomic-oxygen exposed sample and from unexposed control samples. This surface layer is believed to be responsible for the 'synergistic' effect between VUV and atomic oxygen. Overall, the investigation revealed dramatically different morphologies for the two samples. The sample receiving both atomic-oxygen and VUV exposure was deeply eroded and had a characteristic 'rolling' surface morphology, while the sample that received only VUV exposure showed mild erosion and a surface morphology characterized by sharp high-frequency peaks. The morphologies observed in the LDEF samples, including the embrittled surface layer, were successfully duplicated in the laboratory

Let\u27s Get Physical: Exploring the Socioemotional Motivators of Group Exercise for Older Adults

Approximately 75% of active adults in the U.S. do not meet the recommended levels of overall physical activity (CDC, 2021a). Given the beneficial impact of physical activity on health, an 8-week long, evidence-based group exercise program—Fit & Strong! (F&S!)—was created to improve the health of older adults (Hughes et al., 2004, 2006, 2010). Despite the clear physical benefits of F&S!, it remains unknown what motivates F&S! participants to initially participate in the program and also throughout the program. Drawing from core notions of socioemotional selectivity theory (SST; Carstensen, 2006), research has found that older adults are highly motivated to exercise by social goals (Steltenpohl et al., 2019). In other work, Fredrickson (2016) has proposed that positivity resonance—a caring interpersonal connection involving shared positivity and synchrony—is impactful in enhancing psychological and physiological wellbeing, and may play a central role in the quality of the older adults’ exercise experiences. As such, we investigated the extent to which health, social, and emotional factors motivated older adults to participate in F&S!, as well as the presence of positivity resonance during the program itself. Results indicated that (1) F&S! is most important to older adults for health and social reasons relative to emotional reasons, and (2) older adults, within the context of group exercise, experienced high levels of positivity resonance. These findings highlight the importance of how emphasizing both the social and health benefits of group exercise may be leveraged to motivate and maintain intentions to exercise for older adults

Simon Terrill: Crowd Theory 2004-18, Perspectives, Notes and Comments

A catalogue publication for a major survey of the monumental Crowd Theory photographs by Melbourne-born, London-based artist Simon Terrill. The publication coincides with an exhibition bringing together all ten Crowd Theory images for the first time, at the Centre for Contemporary Photography, Melbourne. Inside are a range of responses and documents, including images and texts from the time of each event, as well as three newly commissioned essays reflecting on the project

Polymer Translocation in Crowded Environments

We study the effect of the crowded nature of the cellular cytoplasm on the translocation of a polymer through a pore in a membrane. By systematically treating the entropic penalty due to crowding, we show that the translocation dynamics are significantly altered, leading to novel scaling behaviors of the translocation time in terms of chain length. We also observe new and qualitatively different translocation regimes depending upon the extent of crowding, transmembrane chemical potential asymmetry, and polymer length.Comment: 4 figure

Exploring Possibilities of Predicting Positive Counselor Qualities in Counseling Students from Personality Domains

In this pilot study, the authors investigated the degree that Big Five personality domains may predict the positive counselor qualities among 160 students enrolled in sections of a combined undergraduate/graduate Counseling Skills course. Positive counselor qualities of focus in this study are empathy, mindfulness or self-awareness, and unconditional positive self-regard in students studying counseling skills. The results do not suggest a significant predictive role for the Big Five personality domains for the Counseling Skills students, except that the Big Five domain of neuroticism predicted enough variation in mindfulness and unconditional positive self-regard to be practically significant. Limitations and potential implications of these findings for counselor educators and for future research are discussed