Life Cycle Assessment (LCA) of Tourism Activities

Abstract— Tourism, like other developed industries is a commerce that requires energy inputs and yields outputs with significant effects on the environment. However a comprehensive study examining the life cycle impact associated with each tourism component including transportation, accommodation, food services, and recreation is still lacking. Therefore a search of previous tourism life cycle studies was carried out and ten studies were further investigated. Indicators, assessment approaches, and system boundaries of these previous studies were assessed. Then the outcomes were normalized and compared in order to obtain ranges for the four components of tourism. It was found that energy intensity (MJ) and carbon dioxide (kg CO2-eq) are the most investigated life cycle indicators. System boundaries vary significantly among studies, with airplane transportation to the destination, hotel accommodations during the trip and local recreation attractions being the most studied tourism components. Of the ten studies, transportation is consistently reported as the most energy intensive component and sightseeing recreation is the least. Finally, this study identifies gaps in the existing literature and provides a direction for future research concerning the impacts of tourism

On Neuromechanical Approaches for the Study of Biological Grasp and Manipulation

Biological and robotic grasp and manipulation are undeniably similar at the level of mechanical task performance. However, their underlying fundamental biological vs. engineering mechanisms are, by definition, dramatically different and can even be antithetical. Even our approach to each is diametrically opposite: inductive science for the study of biological systems vs. engineering synthesis for the design and construction of robotic systems. The past 20 years have seen several conceptual advances in both fields and the quest to unify them. Chief among them is the reluctant recognition that their underlying fundamental mechanisms may actually share limited common ground, while exhibiting many fundamental differences. This recognition is particularly liberating because it allows us to resolve and move beyond multiple paradoxes and contradictions that arose from the initial reasonable assumption of a large common ground. Here, we begin by introducing the perspective of neuromechanics, which emphasizes that real-world behavior emerges from the intimate interactions among the physical structure of the system, the mechanical requirements of a task, the feasible neural control actions to produce it, and the ability of the neuromuscular system to adapt through interactions with the environment. This allows us to articulate a succinct overview of a few salient conceptual paradoxes and contradictions regarding under-determined vs. over-determined mechanics, under- vs. over-actuated control, prescribed vs. emergent function, learning vs. implementation vs. adaptation, prescriptive vs. descriptive synergies, and optimal vs. habitual performance. We conclude by presenting open questions and suggesting directions for future research. We hope this frank assessment of the state-of-the-art will encourage and guide these communities to continue to interact and make progress in these important areas

Challenges for the Evaluation of the P.I.P.P.I. - Programme of Intervention for Prevention of Institutionalisation: between Partecipative and Experimental Pathways

Evaluation is constantly requested by governments and decision-makers, to prove that social policies and actions undertaken are effective in responding to problems. Also programmes contrasting child neglect are involved in such request to guarantee that children enjoy their childhood and ensure access to quality service. This paper focuses on an Italian evaluation experience of one such programme named the P.I.P.P.I. (Programme of Intervention for Prevention of Institutionalisation), the outcome of a collaboration between the University of Padua and the Italian Ministry of Welfare. The paper questions and challenges the experimental designs normally used for these evaluation purposes, highlighting how knowledge of effective treatments is far from the practices delivered. The study proposes an innovative evaluation path in which the participative evaluation, where the professionals build their own knowledge through an evaluation in the field, coexists with the choice of matching as a (quasi) experimental evaluation, responding to the Government\u2019s request for effective investments

P.I.P.P.I.: What has changed? How and why? The empirical evidence

This paper provides a summary of the results of the P.I.P.P.I. Program in achieving the prefixed goals on the final, intermediate and proximal outcome variables, regarding children\u2019s development, the positive exercise of parental competences and the effective action of services respectively. Therefore, the main purpose is to describe the impact of the program on the overall well-being of children and families in relation to the processes implemented. This is possible thanks to the wealth of information gathered by professionals through the tools provided for the analysis, design and monitoring activities in the work with families

A Synergistic Behavior Underpins Human Hand Grasping Force Control During Environmental Constraint Exploitation

Despite the complex nature of human hands, neuroscientific studies suggested a simplified kinematic control underpinning motion generation, resulting in principal joint angle co-variation patterns, usually called postural hand synergies. Such a low dimensional description was observed in common grasping tasks, and was proven to be preserved also for grasps performed by exploiting the external environment (e.g., picking up a key by sliding it on a table). In this paper, we extend this analysis to the force domain. To do so, we performed experiments with six subjects, who were asked to grasp objects from a flat surface while force/torque measures were acquired at fingertip level through wearable sensors. The set of objects was chosen so that participants were forced to interact with the table to achieve a successful grasp. Principal component analysis was applied to force measurements to investigate the existence of co-variation schemes, i.e. a synergistic behavior. Results show that one principal component explains most of the hand force distribution. Applications to clinical assessment and robotic sensing are finally discussed

Neural bases of hand synergies

The human hand has so many degrees of freedom that it may seem impossible to control. A potential solution to this problem is "synergy control" which combines dimensionality reduction with great flexibility. With applicability to a wide range of tasks, this has become a very popular concept. In this review, we describe the evolution of the modern concept using studies of kinematic and force synergies in human hand control, neurophysiology of cortical and spinal neurons, and electromyographic (EMG) activity of hand muscles. We go beyond the often purely descriptive usage of synergy by reviewing the organization of the underlying neuronal circuitry in order to propose mechanistic explanations for various observed synergy phenomena. Finally, we propose a theoretical framework to reconcile important and still debated concepts such as the definitions of "fixed" vs. "flexible" synergies and mechanisms underlying the combination of synergies for hand control

Effects of Visual Cues of Object Density on Perception and Anticipatory Control of Dexterous Manipulation

Anticipatory force planning during grasping is based on visual cues about the object’s physical properties and sensorimotor memories of previous actions with grasped objects. Vision can be used to estimate object mass based on the object size to identify and recall sensorimotor memories of previously manipulated objects. It is not known whether subjects can use density cues to identify the object’s center of mass (CM) and create compensatory moments in an anticipatory fashion during initial object lifts to prevent tilt. We asked subjects (n = 8) to estimate CM location of visually symmetric objects of uniform densities (plastic or brass, symmetric CM) and non-uniform densities (mixture of plastic and brass, asymmetric CM). We then asked whether subjects can use density cues to scale fingertip forces when lifting the visually symmetric objects of uniform and non-uniform densities. Subjects were able to accurately estimate an object’s center of mass based on visual density cues. When the mass distribution was uniform, subjects could scale their fingertip forces in an anticipatory fashion based on the estimation. However, despite their ability to explicitly estimate CM location when object density was non-uniform, subjects were unable to scale their fingertip forces to create a compensatory moment and prevent tilt on initial lifts. Hefting object parts in the hand before the experiment did not affect this ability. This suggests a dichotomy between the ability to accurately identify the object’s CM location for objects with non-uniform density cues and the ability to utilize this information to correctly scale their fingertip forces. These results are discussed in the context of possible neural mechanisms underlying sensorimotor integration linking visual cues and anticipatory control of grasping

Sensorimotor control of gait: a novel approach for the study of the interplay of visual and proprioceptive feedback

Sensorimotor control theories propose that the central nervous system exploits expected sensory consequences generated by motor commands for movement planning, as well as online sensory feedback for comparison with expected sensory feedback for monitoring and correcting, if needed, ongoing motor output. In our study, we tested this theoretical framework by quantifying the functional role of expected versus actual proprioceptive feedback for planning and regulation of gait in humans. We addressed this question by using a novel methodological approach to deliver fast perturbations of the walking surface stiffness, in conjunction with a virtual reality system that provided visual feedback of upcoming changes of surface stiffness. In the predictable experimental condition, we asked subjects to learn associating visual feedback of changes in floor stiffness (sand patch) during locomotion to quantify kinematic and kinetic changes in gait. In the unpredictable experimental condition, we perturbed floor stiffness at unpredictable instances during the gait to characterize the gait-phase dependent strategies in recovering the locomotor cycle. For the unpredictable conditions, visual feedback of changes in floor stiffness was absent or inconsistent with tactile and proprioceptive feedback. The investigation of these perturbation-induced effects on legs kinematics revealed that visual feedback of upcoming changes in floor stiffness allows for both early (preparatory) and late (post-perturbation) changes in leg kinematics. However, when proprioceptive feedback is not available, the early responses do not occur while the late responses are preserved although in a, slightly attenuated form. The methods proposed and the preliminary results of this study open new directions for the investigation of the relative role of visual, tactile, and proprioceptive feedback on gait control, with potential implications for designing novel robot-assisted gait rehabilitation approaches

Challenges for the Evaluation of the P.I.P.P.I. - Programme of Intervention for Prevention of Institutionalisation: between Partecipative and Experimental Pathways

Evaluation is constantly requested by governments and decisionmakers, to prove that social policies and actions undertaken are effective in responding to problems. Also, programmes contrasting child neglect are involved in such request to guarantee that children enjoy their childhood and ensure access to quality service. This paper focuses on an Italian evaluation experience of such a programme, thanks to the collaboration between University of Padua and Italian Ministry of Welfare. It is called P.I.P.P.I. - Programme of Intervention for Prevention of Institutionalisation. The paper questioned and challenged the experimental designs normally used for these evaluation purposes, highlighting how knowledge of effective treatments is far from the practices delivered. The study purposes an innovative evaluation path, intertwining the participative evaluation where the professionals build their own knowledge through an evaluation in the field, with the choice of matching as (quasi) experimental evaluation, responding to the Government’s request of effective investments

Avaliação de imóveis urbanos com utilização da lógica difusa

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico . Programa de Pós-Graduação em Engenharia de ProduçãoEsta dissertação apresenta a pesquisa sobre o desenvolvimento de um método e modelo de apoio à decisão, na avaliação de imóveis urbanos. Pretende-se aumentar a transparência nas avaliações, capacitando os agentes sociais não especialistas, e os profissionais que atuam na área, em melhor compreender e decidir acerca da formação dos valores no mercado imobiliário. O método desenvolvido contribui no conhecimento sobre como as variáveis difusas influenciam a formação do valor dos imóveis. Os critérios de referências são indicadores físicos, sociais e econômicos, agrupados e combinados em operações lógicas de sistemas fuzzy (fuzzy sets). O modelo proposto ordena e combina indicadores de qualidade da construção, de localização e do mercado. Estes indicadores são agregados em blocos de regras de um dendrograma tipo Top Down Induction of Decision Trees, com operações básicas da lógica fuzzy. O modelo foi aplicado na avaliação de um apartamento, onde se verificou sua sensibilidade e a robustez