5,605 research outputs found
Dataset for the paper "Climate model bias indicates higher projected future temperature extremes"
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<div>This repository holds data and scripts used to produce the paper entitled:</div>
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<div>"Climate model bias indicates higher projected future temperature extremes"</div>
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<div>by Lei Duan, Lyssa M. Freese, Govindasamy Bala, and Ken Caldeira.</div>
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<div>The paper is currently submitted for peer review.</div>
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<div>Any questions regarding the data and paper could be sent to the corresponding author: Lei Duan ([email protected])</div>
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Lei nº 12.846, de 2013: mudanças e perspectivas na responsabilização da pessoa jurídica
No full textTCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Jurídicas. Direito.Este trabalho propõe-se a, inicialmente, analisar os motivos que levaram à elaboração da Lei nº 12.846, de 2013, assim como os princípios de direito constitucional e administrativo que servirão como sua base legitimadora e fundamentarão sua atuação. Posteriormente a tal análise, elaborar-se-á, a partir do rito processual administrativo previsto na Lei nº 9.784, de 1999, a estrutura processual e a sequência dos procedimentos que as pessoas jurídicas de direito privado que forem investigadas a partir da Lei nº 12.846 serão sujeitas, com destaque aos pontos em que o novo diploma legal diverge ou acrescenta no previsto pela Lei processual, assim como suas semelhanças e peculiaridades quando comparado a outros corpos normativos similares. Após, será realizado estudo relativo ao instituto da responsabilidade objetiva previsto na Lei nº 12.846, sua evolução histórica e as consequências de sua aplicação na seara administrativa. A matéria de análise subsequente tratará das possíveis sanções a serem aplicadas contra as pessoas jurídicas de direito privado condenadas em processo administrativo, as previsões aplicáveis frente a seus gestores, além das possibilidades de responsabilização judicial elencadas na nova Lei. Em seguida será exposta ponderação no tocante a Acordos de Leniência, sua aplicação no direito brasileiro e suas perspectivas frente à Lei nº 12.846, onde esta possibilidade de acordo vêm prevista. No capítulo final deste trabalho serão analisados os programas de Compliance, que cada vez mais ganham importância no cenário econômico internacional e passam a receber grande impulso a partir das previsões contidas na nova Lei. Também neste bloco serão elencadas críticas e análises que vem sendo elaboradas por profissionais do ramo jurídico frente à nova Lei, contrapostas pela leitura do autor dos dispositivos contestados.This paper proposes to initially analyze the reasons that led to the drafting of Law No. 12.846, of 2013, as well as the principles of constitutional and administrative framework will serve as a legitimizing basis and will base its operations right. Subsequent to this analysis, will be drawn up, from the administrative procedural rite under Law No. 9.784, of 1999, the procedural structure and sequence of procedures that legal entities of private law which are investigated from the Law No. 12.846 will be subject, highlighting the points where the new law differs or adds predicted by the procedural law, as well as their similarities and peculiarities when compared to similar regulatory bodies. After, will be held on the institute's strict liability under Law No. 12.846, its historical evolution and study the consequences of its application in administrative harvest. The subsequent analysis focuses on the field of the possible sanctions to be applied against legal persons of private law convicted in an administrative proceeding, the predictions apply against their managers, the possibilities of judicial accountability listed in the new law. Next will be exposed weighting in respect of the leniency agreements, their implementation in Brazilian law and its prospects ahead to Law No. 12,846, where this possibility according come provided. In the final chapter of this work the Compliance programs, which increasingly gain importance in the international economic scenario and started to receive major boost from the forecasts contained in the new law also in this block will be analyzed and critical analysis that has been developed will be listed by professionals in the legal branch opposite the new law, opposing the reading of the author of the disputed devices
Nanofiltration and sensing of picomolar chemical residues in aqueous solution using an optical porous resonator in a microelectrofluidic channel
No full textFor the first time the use a porous microresonator placed in a microelectrofluidic system for integrated functions of nano filtration and sensing of small biomolecules and chemical analytes in extremely dilute solution was proposed and investigated. As an example, aminoglycosides in drug residues in food and livestock products were considered as the trace chemical analyte. The filtration process of the charged analyte in aqueous solution driven by an applied electrical field and the accompanied optical whispering-gallery modes in the resonator are modeled. The dynamic process of adsorption and desorption of the analyte onto the porous matrix is studied. The analyte deposition inside the porous structure will alter the material refractive index of the resonator, and thus, induce optical resonance frequency shift. By measuring the optical frequency shift, the analyte concentration as well as the absorption/desorption process can be analyzed. Through an intensive numerical study, a correlation between the frequency shift and the analyte concentration and the applied electrical voltage gradient was obtained. It reveals a linear relationship between the resonance frequency shift and the analyte concentration. The applied electrical voltage enhances substantially the filtration capability and the magnitude of the optical frequency shift, pushing the porous resonator-based sensor to function at the extremely dilute picomolar concentration level for small bio/chemical molecules down to the sub-nanometer scale. Moreover, use of the second-order whispering-gallery mode is found to provide better sensitivity as compared with the first-order mode.Peer reviewed
An exploratory study of multiple identities in East Asian American women who are attracted to women
No full textThis exploratory study examined the experiences of East Asian American women who are romantically or sexually attracted to women (EAAWAW). EAAWAW was selected as the most inclusive term for women self-identifying as lesbian, gay, queer, and bisexual. EAAWAW have previously been studied as a population that experiences unique challenges due to their multiple minority status. They have to navigate situations in which one or more of their minority statuses related to their gender, sexual orientation, and ethnicity are stigmatized, which might lead to psychological stress. Three main research questions were addressed in this study: 1) What are the challenges that EAAWAW face with regard to their sexual identity, gender, and ethnicity? 2) How do they deal with these challenges? Specifically, how might they utilize multiple self-aspects to manage stigma and stress associated with being attracted to women, East Asian, and female? 3) How do EAAWAW conceptualize themselves with regard to their identity and how does their self-concept vary across contexts? A qualitative analysis of nine semi-structured, in-depth interviews was completed using a grounded theory approach. Participants ranged in age from 25 to 65 and were all residing in the United States. The interview data were analyzed to uncover qualitative themes. These included the range of identities and roles with which EAAWAW identify, multiple minority stress, invisibility, conflict between sexual orientation and family and East Asian values, freedom from societal norms, positive discrimination, benevolent prejudice, social support, identity management, and cognitive reframes. Overall, despite the stigma- related challenges that EAAWAW experience, the individuals interviewed in this study demonstrated much resilience and a variety of coping strategies that allowed them to move between communities and manage their multiple identities. These findings are discussed as well as their important implications for EAAWAW, their families, mental health professionals, and the communities to which EAAWAW belong. The study suggests that these groups would benefit from an increased understanding of the nature of multiple minority stress as well as the variety of cognitive, interpersonal, and identity management strategies available to EAAWAW as they navigate different communities and contexts in their personal and professional lives.Psy. D.Includes bibliographical referencesby Diana Lei Lei On
Investigation on inviscid flow methods for 2D LEI tube kite
No full textOn a typical 2D LEI kite profile, ow separation is expected to occur on both suction and pressure sides of the airfoil. This thesis is aimed to study various inviscid ow models that are capable of modeling such multiple ow separation phenomena. Inviscid models are capable of modeling single ow separation region over typical airfoils. In these models, the ow separation is modeled by releasing vorticity in to the ow from the separation location which are known prior and given as a direct input to the model. The separation locations can be taken either from experimental data or RANS simulation results of the airfoil. From the various singularity elements available for modeling, in this thesis point vortex elements and linear distribution of vorticity elements are utilized for modeling the ow and a step by step procedure of development of the solver starting from steady state to unsteady single wake and then to double wake model is followed. Each solver developed is validated against available analytical results. However, in the time line of the current study, the double wake model developed could not be validated with the chosen test case. The modeling challenges faced in the development phase of double wake model can be mainly attributed to the unclear modeling details in implementing the strength of the separation vortex that is shed from separation location. The other challenged include accumulation and crossing of shed wake elements through the airfoil surface, similar to the challenges reported by Rachel [25]. These challenges are clearly discussed and recommendations have been made for overcoming wake shedding problem. The author believes that such an inviscid model overcoming the modeling challenges experienced in double wake model, can be easily extended to model multiple separation regions over 2D LEI tube kites.Aerospace Engineerin
Thermocapillary Multidewetting of Thin Films
No full textThermocapillary dewetting of liquids and molten films has recently emerged as a viable alternative to conventional microprocessing methods. As this thermal gradient-induced mechanism is universal, it can be applied to any material. This work explores the sequential dewetting of materials with varying melting points, including polymers and metals, to create aligned morphologies. The variation in melting point allows for the dewetting of single layers at a time or mobility-limited simultaneous dewetting. As a result, a variety of multimaterial structures can be produced with built-in alignment, such as arrays of concentric circles, lines with periodic segmentation, or islands on holes. This approach employs photothermal methods to induce the necessary thermal gradient, manipulating several variables in order to influence the consequent structures. Adjusting laser power and light intensity allows for the control of temperature for selective dewetting of films; altering beam size and exposure time affects the extent of dewetting in terms of diameter size; overlap effects and simultaneous dewetting can result in complex architectures. This controlled writing of patterns also presents a technique to create both masks at low temperatures for conductive multilayers as well as templates for electrospray deposition.Peer reviewe
Design, fabrication and test on piezoelectric energy harvesters with non-traditional geometries
No full textUnimorph piezoelectric cantilevers with non-traditional surface geometries were investigated by theoretical calculations, finite element models, and sample tests. The study shows the average output voltage for piezoelectric cantilevers with same length and surface area is unique, no matter what the surface shapes are. Optimization on cross section was also conducted theoretically, which indicated a trapezoidal-shaped unimorph cross section can maximize the average output voltage. Several dome-shape piezoelectric devices were fabricated using PZT-epoxy sol-gel method and deposition from spin coating techniques. The surface area was examined by AFM and SEM images. Parameters like piezoelectric coefficients d31, d33 and capacitance were investigated; their trends with increasing polling voltages were also plotted and analyzed. A novel approach to ribbon-shaped PZT device on a flexible substrate was advanced at last.M.S.Includes bibliographical referencesby Lei Wan
Molecular Diversity of Dscam and Self-Recognition
No full textCo-author Lei Shi is a student in the Neuroscience program in the Graduate School of Biomedical Sciences (GSBS) at UMass Medical School.Cell recognition requires interactions through molecules located on cell surface. The insect homolog of Down syndrome cell adhesion molecule (Dscam) manifests huge molecular diversity in its extracellular domain. High-affinity Dscam-Dscam interactions only occur between isoforms that carry identical extracellular domains. Homophilic Dscam signaling can, thus, vary in strength depending on the compositions of Dscams present on the opposing cell surfaces. Dscam abundantly exists in the developing nervous system and governs arborization and proper elaboration of neurites. Notably, individual neurons may stochastically and dynamically express a small subset of Dscam isoforms such that any given neurite can be endowed with a unique repertoire of Dscams. This allows individual neurites to recognize their sister branches. Self-recognition leads to self-repulsion, ensuring divergent migration of sister processes. By contrast, weak homophilic Dscam interactions may promote fasciculation of neurites that express analogous, but not identical, Dscams. Differential Dscam binding may provide graded cell recognition that in turn governs complex neuronal morphogenesis.Neuroscienc
Trajectories of collaborative scientific conceptual change: middle school students learning about ecosystems in a CSCL environment
No full textThe dissertation aims to achieve two goals. First, it attempts to establish a new theoretical framework -- the collaborative scientific conceptual change model, which explicitly attends to social factor and epistemic practices of science, to understand conceptual change. Second, it report the findings of a classroom study to investigate how to apply this theoretical framework to examine the trajectories of collaborative scientific conceptual change in a CSCL environment and provide pedagogical implications. Two simulations were designed to help students make connections between the macroscopic substances and the aperceptual microscopic entities and underlying processes. The reported study was focused on analyzing the aggregated data from all participants and the video and audio data from twenty focal groups' collaborative activities and the process of their conceptual development in two classroom settings. Mixed quantitative and qualitative analyses were applied to analyze the video/audio data. The results found that, overall participants showed significant improvements from pretest to posttest on system understanding. Group and teacher effect as well as group variability were detected in both students' posttest performance and their collaborative activities, and variability emerged in group interaction. Multiple data analyses found that attributes of collaborative discourse and epistemic practices made a difference in student learning. Generating warranted claims in discourse as well as the predicting, coordinating theory-evidence, and modifying knowledge in epistemic practices had an impact on student's conceptual understanding. However, modifying knowledge was found negatively related to students' learning effect. The case studies show how groups differed in using the computer tools as a medium to conduct collaborative discourse and epistemic practices. Only with certain combination of discourse features and epistemic practices can the group interaction lead to successful convergent understanding. The results of the study imply that the collaborative scientific conceptual change model is an effective framework to study conceptual change and the simulation environment may mediate the development of successful collaborative interactions (including collaborative discourse and epistemic practices) that lead to collaborative scientific conceptual change.Ph.D.Includes bibliographical references (p. 120-129)by Lei Li
Reactions of Trifluoromethylchlorocarbene with Olefins: Research Report of Lei Wang, June 18, 2013
No full textResearch ReportWork supported by NSF CHE 1261862
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