Learning-Based Inverse Bi-Scale Material Fitting From Tabular BRDFs.

Relating small-scale structures to large-scale appearance is a key element in material appearance design. Bi-scale material design requires finding small-scale structures - meso-scale geometry and micro-scale BRDFs - that produce a desired large-scale appearance expressed as a macro-scale BRDF. The adjustment of small-scale geometry and reflectances to achieve a desired appearance can become a tedious trial-and-error process. We present a learning-based solution to fit a target macro-scale BRDF with a combination of a meso-scale geometry and micro-scale BRDF. We confront challenges in representation at both scales. At the large scale we need macro-scale BRDFs that are both compact and expressive. At the small scale we need diverse combinations of geometric patterns and potentially spatially varying micro-BRDFs. For large-scale macro-BRDFs, we propose a novel 2D subset of a tabular BRDF representation that well preserves important appearance features for learning. For small-scale details, we represent geometries and BRDFs in different categories with different physical parameters to define multiple independent continuous search spaces. To build the mapping between large-scale macro-BRDFs and small-scale details, we propose an end-to-end model that takes the subset BRDF as input and performs classification and parameter estimation on small-scale details to find an accurate reconstruction. Compared with other fitting methods, our learning-based solution provides higher reconstruction accuracy and covers a wider gamut of appearance.

Standards of Practice for Occupational Therapy.

This document defines minimum standards for the practice of occupational therapy. According to the Occupational Therapy Practice Framework: Domain and Process (4th ed.; OTPF-4), occupational therapy is defined as the therapeutic use of everyday life occupations with persons, groups, or populations (i.e., the client) for the purpose of enhancing or enabling participation. . . . Occupational therapy services are provided for habilitation, rehabilitation, and promotion of health and wellness for clients with disability- and non-disability-related needs. These services include acquisition and preservation of occupational identity for clients who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. (American Occupational Therapy Association [AOTA], 2020c, p. 1).

Occupational Therapy in the Promotion of Health and Well-Being.

A balanced pattern of occupations enhances the health and fulfills the needs of individuals, families, communities, and populations (American Occupational Therapy Association [AOTA], 2014b; Hocking, 2019; Meyer, 1922). Occupations are personalized "everyday activities that people do as individuals, in families, and with communities to occupy time and bring meaning and purpose to life" (World Federation of Occupational Therapists, 2012, para. 2). The purpose of this statement is to describe occupational therapy's role and contribution in the areas of health promotion and prevention for internal and external audiences. AOTA supports and promotes the involvement of occupational therapy practitioners¹ in the development and delivery of programs and services that promote health, well-being, and social participation of all people.

Simulation of Textile Stains.

Modeling virtual textiles has long been an appealing topic in computer graphics. To date, considerable effort has been devoted to their distinctive appearance and physically-based simulation. The apperance of staining patterns, commonly seen on textiles, has received comparatively little attention. This paper introduces techniques for simulating staining effects on fabric. Based on the microstructure of yarn, we propose a triple-layer model (TLM) to handle the liquid-yarn interaction for the wetting and wicking computation, and we formalize the liquid spreading in woven cloth into two typical actions, the in-yarn diffusion and the cross-yarn diffusion. The dye diffusion is driven by the liquid diffusion and the concentration distribution of pigments. The warp-weft anisotropy is handled by simulation of the yarn's structure in the two directions. Experimental results demonstrate that a wide range of fabric stain phenomenon on different textile materials, such as the water ring effect, the high saturate stain contour, and the dynamic wash away effect, can be simulated effectively without loss of visual realism. The realism of our simulation results is comparable to effects shown in photographs of real-world examples.

PaperCraft3D: Paper-Based 3D Modeling and Scene Fabrication.

A 3D modeling system with all-inclusive functionality is too demanding for a casual 3D modeler to learn. There has been a shift towards more approachable systems, with easy-to-learn, intuitive interfaces. However, most modeling systems still employ mouse and keyboard interfaces, despite the ubiquity of tablet devices and the benefits of multi-touch interfaces. We introduce an alternative 3D modeling and fabrication paradigm using developable surfaces, inspired by traditional papercrafting, and we implement it as a complete system designed for a multi-touch tablet, allowing a user to fabricate 3D scenes. We demonstrate the modeling and fabrication process of assembling complex 3D scenes from a collection of simpler models, in turn shaped through operations applied to virtual paper. Our fabrication method facilitates the assembly of the scene with real paper by automatically converting scenes into a series of cutouts with appropriately added fiducial markers and supporting structures. Our system assists users in creating occluded supporting structures to help maintain the spatial and rigid properties of a scene without compromising its aesthetic qualities. We demonstrate several 3D scenes modeled and fabricated in our system, and evaluate the faithfulness of our fabrications relative to their virtual counterparts and 3D-printed fabrications.

Re-evaluation of a LEED Platinum Building: Occupant experiences of health and comfort.

BACKGROUND: There is a need to better understand the perceived experiences of workers in green buildings as the literature to this point has been mixed. OBJECTIVES: To re-evaluate occupant experiences within a LEED platinum building and investigate current experiences in general. METHODS: An online post occupancy evaluation (POE) survey of 62 occupants of LEED Platinum building on a US college campus is reported. The online survey addressed indoor environmental quality in relation to health, productivity and satisfaction. RESULTS: Of the respondents, 38.7% had participated in a prior POE of this building in 2011 and results were compared for this subgroup, as well as for overall results. There was a significant increase in satisfaction with office workstations and air freshness as compared to 3 years earlier. However, there was also a significant increase in reported frequency of all physical symptoms. When looking just at the current POE results, control over features of the workstation had a significant relationship with most outcomes of interest. CONCLUSION: While improvements have been noted, issues continue to exist that have implications for health, productivity and satisfaction. The results of this study have implications for the ergonomic design of workstations and indoor environmental quality within LEED buildings.

Effectiveness of Occupational Therapy Interventions for Lower-Extremity Musculoskeletal Disorders: A Systematic Review.

Lower-extremity (LE) musculoskeletal disorders (MSDs) can have a major impact on the ability to carry out daily activities. The effectiveness of interventions must be examined to enable occupational therapy practitioners to deliver the most appropriate services. This systematic review examined the literature published between 1995 and July 2014 that investigated the effectiveness of occupational therapy interventions for LE MSDs. Forty-three articles met the criteria and were reviewed. Occupational therapy interventions varied on the basis of population subgroup: hip fracture, LE joint replacement, LE amputation or limb loss, and nonsurgical osteoarthritis and pain. The results indicate an overall strong role for occupational therapy in treating clients with LE MSDs. Activity pacing is an effective intervention for nonsurgical LE MSDs, and multidisciplinary rehabilitation is effective for LE joint replacement and amputation. Further research on specific occupational therapy interventions in this important area is needed.

Using the WEIS-SR to evaluate employee perceptions of their college work environment.

BACKGROUND: Colleges have been experiencing reduced resource allocations, shifting student expectations, and organizational change. These changes increase employee stress at all levels. Ensuring that employee needs are being met and promoting a healthy and productive workforce has never been more important. OBJECTIVE: To investigate employees' current perceptions of their work environments using the Work Environment Impact Scale-Self Rating (WEIS-SR). METHODS: Full and part time employees on a small college campus in the United States were surveyed using the WEIS-SR through an online survey program to protect their anonymity. RESULTS: Perception of staffing levels, workplace support for a healthy lifestyle, number of supervisors, and personal health ratings contributed to employee perceptions of their work environment. There were also differences between staff, administration, and tenured and non-tenured faculty. CONCLUSIONS: From an occupational performance perspective, valuable information on employees' levels of volition, performance capacity and habituation, and perceptions of their physical and social environment in relation to their work environments was obtained. Further support for the use of the WEIS-SR and psychometric properties of the instrument (reliability and validity) was obtained.

A call for sustainable practice in occupational therapy.

BACKGROUND: The ability of the earth to sustain health among humans and in the natural world is under threat from overpopulation, environmental degradation, and climate change. These global threats are anticipated to harm health and human occupation in many direct and indirect ways. Strategies are needed to mitigate the effects of these threats and to build individual and community capacities to foster resilience. PURPOSE: This paper links issues of sustainability with occupational therapy philosophy and discusses how employing a sustainability lens with professional reasoning can help practitioners integrate sustainability into their practice. KEY ISSUES: Human occupation is inseparable from the environments in which people live. Human occupation has caused the current environmental crisis, and targeted human action is required to safeguard future health and well-being. IMPLICATIONS: Occupational therapists have an ethical obligation to use professional reasoning strategies that, taken collectively, can help to build a sustainable and resilient future.

Effects of Approximate Filtering on the Appearance of Bidirectional Texture Functions.

The BTF data structure was a breakthrough for appearance modeling in computer graphics. More research is needed though to make BTFs practical in rendering applications. We present the first systematic study of the effects of Approximate filtering on the appearance of BTFs, by exploring the spatial, angular and temporal domains over a varied set of stimuli. We perform our initial experiments on simple geometry and lighting, and verify our observations on more complex settings. We consider multi-dimensional filtering versus conventional mipmapping, and find that multi-dimensional filtering produces superior results. We examine the tradeoff between under- and oversampling, and find that different filtering strategies can be applied in each domain, while maintaining visual equivalence with respect to a ground truth. For example, we find that preserving contrast is more important in static than dynamic images, indicating greater levels of spatial filtering are possible for animations. We find that filtering can be performed more aggressively in the angular domain than in the spatial. Additionally, we find that high-level visual descriptors of the BTF are linked to the perceptual performance of pre-filtered approximations. In turn, some of these high-level descriptors correlate with low level statistics of the BTF. We show six different practical applications of applying our findings to improving filtering, rendering and compression strategies.

The importance of ergonomics to sustainability throughout a building's life cycle.

Protecting and conserving environmental resources is a global concern. Over the past decade, a number of certification processes have emerged to help designers and operators of buildings assess the potential impact of a building on the environment. Certifications such as the Leadership in Energy and Environmental Design (LEED) consider the environmental impact through the lifecycle of a building, but may not be considering the people that construct and utilize it. It is important to remember the human factor. Considering the human factor throughout the lifecycle is crucial to ensure individuals are protected during construction and in operation in the built environment. The paper highlights how ergonomics can be integrated into the life cycle of a building to promote sustainability goals for both the human factor and the environment. A case study approach will be used to illustrate how ergonomics was integrated into a LEED renovation and expanded into its daily operations on a large university campus..

Intergenerational service learning with elders: multidisciplinary activities and outcomes.

This article provides an overview of the activities included in a 3-year, multidisciplinary, intergenerational service-learning project conducted as part of a Foundation for Long-Term Care Service Learning: Linking Three Generations grant. Courses from four departments (gerontology, psychology, occupational therapy, and health promotion and physical education) and one interdisciplinary clinical intervention for stroke patients (speech pathology, occupational therapy, and therapeutic recreation) were involved. Service-learning activities were embedded in course curricula and varied from semester-long activities in group settings to activities involving one-on-one contact for several hours. In total, eight faculty and 225 students worked with 148 elders and 12 different community organizations to plan and implement activities for 357 older adults. Students and elders reported a high degree of satisfaction with the intergenerational activities and indicated that they learned from them and found them of value personally.