Transformable products (or transformers), those with two or more functional states, are increasingly utilized by our society. As the mobility and complexity of life increases, so must the adaptability of the products which we use. We need new design techniques to develop more adaptable devices, such as transformers. The purpose of this study is to propose a response to the question “When is it preferable to implement a design approach focused on developing transformable products over an approach focused on developing primary function, non transforming products?” Our response to this question comes in the form of a method. The method helps a designer or design team consider the benefits of developing a transformer at an early stage in the design process. Research includes a deductive and an inductive study which are used to identify transformation indicators or context properties and usage factors that identify when it is preferable to build a transformable device. Static function-state indicators are also presented. These are contrary to transformation indicators in that they identify contexts suitable for developing non-transforming devices. Our technique seeks to improve the outcome of a design project by encouraging the consideration of transformable solutions and aiding in the selection of an appropriate design process. This method for testing the presence of these indicators in exemplary design contexts is presented. One such application is the design of an autonomous bridge-health monitoring system. / text

To meet ambitious upcoming state renewable portfolio standards (RPSs), respond to customer demand for “green” electricity choices and to move towards more renewable, domestic and clean sources of energy, many utilities and power producers are accelerating deployment of wind, solar photovoltaic and solar thermal generating facilities. These sources of electricity, particularly wind power, are highly variable and difficult to forecast. To manage this variability, utilities can increase availability of fossil fuel-dependent backup generation, but this approach will eliminate some of the emissions benefits associated with renewable energy. Alternately, energy storage could provide needed ancillary services for renewables. Energy storage could also support other operational needs for utilities, providing greater system resiliency, zero emission ancillary services for other generators, faster responses than current backup generation and lower marginal costs than some fossil fueled alternatives. These benefits might justify the high capital cost associated with energy storage. Quantitative analysis of the role energy storage can have in improving economic dispatch, however, is limited. To examine the potential benefits of energy storage availability, a generalized unit commitment model of thermal generating units and energy storage facilities is developed. Initial study will focus on the city of Austin, Texas. While Austin Energy’s proximity to and collaborative partnerships with The University of Texas at Austin facilitated collaboration, their ambitious goal to produce 30-35% of their power from renewable sources by 2020, as well as their continued leadership in smart grid technology implementation makes them an excellent initial test case. The model developed here will be sufficiently flexible that it can be used to study other utilities or coherent regions. Results from the energy storage deployment scenarios studied here show that if all costs are ignored, large quantities of seasonal storage are preferred, enabling storage of plentiful wind generation during winter months to be dispatched during high cost peak periods in the summer. Such an arrangement can yield as much as $94 million in yearly operational cost savings, but might cost hundreds of billions to implement. Conversely, yearly cost reductions of $40 million can be achieved with one CAES facility and a small fleet of electrochemical storage devices. These results indicate that small quantities of storage could have significant operational benefit, as they manage only the highest cost hours of the year, avoiding the most expensive generators while improving utilization of renewable generation throughout the year. Further study using a modified unit commitment model can help to narrow the performance requirements of storage, clarify optimal storage portfolios and determine the optimal siting of this storage within the grid. / text

Psychologists have begun to examine factors that influence the achievement gap between African American and White students. This is a pressing issue especially for African American students (Steele, 1997; Shelton & Sellers, 2000; Cokley, 2001). To better understand the effects of race and gender on perceived discrimination and academic disengagement, 81 African American students at the University of Texas at Austin were randomly assigned to one of three conditions. Participants either listed ten instances of discrimination they have experienced, five academic successes and five academic failures, or made no lists. The impact of these manipulations on responses to the Disengagement Scale (Major & Schmader, 1998) and the Everyday Discrimination Scale (Williams, Yu, Jackson, & Anderson, 1997) were assessed. Results suggest that gender plays an important role in African American students’ academic function. More specifically, African American males perceive more discrimination in academia than African American females, which is related to higher levels of disengagement. Researchers suggest this difference is related to African American males’ socialization to see discrimination as an insurmountable barrier rather than a navigable obstacle. / text

Relationships can shape the self-concept, draw out unique aspects of an individual’s personality, and influence individual perspectives and goals. Yet the self is not a passive player in relationships as self-related goals and motives can also influence how relationships form and develop. While the field is replete with research on the unidirectional influence between self and relationships, surprisingly little has been done on synergistic effect of combined self and relationship influences. I present a new theory of couple identity negotiation that captures how two individuals in a relationship negotiate their independent identities to form a unified couple identity. I hypothesize that the process through which an individual and his/her partner merge to create a new couple identity is crucial in determining relationship longevity and satisfaction. I draw from social identity theory (Turner et al., 1987) and identity fusion theory (Swann et al., 2009) to propose three models of couple identity negotiation: Model A involves the self being subsumed by the partner; Model B involves a negotiation wherein the self and partner both contribute to the couple identity; Model C the self subsuming the partner’s self. Study 1 tests the links between the different models to relationship outcomes, namely relationship satisfaction and commitment. Study 2 explores personality correlates of the models. Results demonstrate that couple identity negotiation models predict different levels of relationship quality. Furthermore, the models are not significantly correlated with personality variables, suggesting that the models are specific to the relationship, and are not driven solely by individual differences. / text

In Speaker’s Reference and Semantic Reference, Saul Kripke posited two kinds of reference involved in every use of a designator—a semantic reference, to the object picked out by the meaning of the words used—and a speaker reference, to the object to which the speaker aimed to call attention by deploying the designator. Kripke tentatively defined the notion of the speaker’s referent as the object that (i) the speaker wishes to call attention to, on a given occasion, and (ii) that he believes fulfills the conditions for being the description’s semantic referent. Although offered as a definition, this account is best interpreted as a tentative statement of the normal success conditions of speaker reference. As such, it raises the question of how special a role semantic reference plays in successful speaker reference. This report addresses that question by evaluating Kripke’s tentative account in the light of an extended series of examples in which definite descriptions are used to speaker refer to objects other than the objects to which the descriptions uniquely semantically refer. The report concludes that words’ semantic characteristics are only one of several forms of evidence that audiences regularly rely on to discern what object a speaker intends to call attention to by a particular act of reference. / text

Pulsed neutron capture (PNC) logs are commonly used for formation evaluation behind casing and to assess time-lapse variations of hydrocarbon pore volume. Because conventional interpretation methods for sigma logs assume homogeneous formations, errors may arise, especially in thinly-bedded formations, when appraising petrophysical properties of hydrocarbon-bearing beds. There exist no quantitative interpretation methods to account for shoulder-bed effects on sigma logs acquired in sand-shale laminated reservoirs. Because of diffusion effects between dissimilar beds, sigma logs acquired in such formations do not obey mixing laws between the sigma responses of pure-sand and pure-shale end members of the sedimentary sequence. We introduce a new numerical method to simulate rapidly and accurately PNC logs. The method makes use of late-time, thermal-neutron flux sensitivity functions (FSFs) to describe the contribution of multi-layer formations toward the measured capture cross section. It includes a correction procedure based on 1D neutron diffusion theory that adapts the transport-equation-derived, base-case FSF of a homogeneous formation to simulate the response of vertically heterogeneous formations. Benchmarking exercises indicate that our simulation method yields average differences smaller than 2 c.u. within seconds of CPU time with respect to PNC logs simulated with rigorous Monte Carlo methods for a wide range of geometrical, petrophysical, and fluid properties. We develop an inversion method to reduce shoulder-bed effects on pulsed neutron capture (PNC) logs in the estimation of layer-by-layer capture cross sections, Σ. The method is based on the previously developed rapid approximation of PNC logs. Tests performed on synthetic examples that include a variety of lithology, saturating-fluid, and bed-thickness configurations confirm the efficiency, reliability, and stability of the inversion procedure. Inversion consistently improves the vertical resolution and Σ definition of PNC logs across beds thinner than 45 cm. Our fast, iterative algorithm inverts sigma logs in seconds of CPU time, and is therefore suitable for joint petrophysical interpretation with other open- and cased-hole logs. / text

Optimal large eddy simulation (OLES) is an approach to LES sub-grid modeling that requires multi-point correlation data as input. Until now, this has been obtained by analyzing DNS statistics. In the finite-volume OLES formulation studied here, under the assumption of small-scale homogeneity and isotropy, these correlations can be theoretically determined from Kolmogorov inertial-range theory, small-scale isotropy, along with the quasi-normal approximation. These models are expressed as generalized quadratic and linear finite volume operators that represent the convective momentum flux. These finite volume operators have been analyzed to determine their characteristics as numerical approximation operators and as models of small-scale effects. In addition, the dependence of the model operators on the anisotropy of the grid and on the size of the stencils is analyzed to develop idealized general operators that can be used on general grids. The finite volume turbulence operators developed here will be applicable in a wide range of LES problems. / text

Currently, the imprint lithography steppers are designed to only pattern one field of 26 x 33 mm at a time. This choice is based on the desire to mix-and-match to the standard optical lithography tools whose field size is also 26 x 33 mm. Throughput can be increased if more than one field can be imprinted simultaneously. The problem with adding a field to the imprinting template is that each field has overlay errors associated with it that are created when the template is manufactured and when the corresponding prior field is manufactured on the wafer. The current process is able to correct these template and wafer overlay errors using a precision stage and actuators that elastically deform the template. The same method cannot be used when there are two fields because the fields are not independent and interact with each other. Correcting the errors in one of the fields tend to increase the error in the second field. vii In this thesis, a new control method has been created to account for the dependent motion. A new template concept was also created to try to limit the interaction between the two fields. The new control algorithm was tested in simulation to see if it could correct the current 1-field setup as well as the new concept of having more than one field on a template. The control algorithm was also used to test applications where the overlay errors in only one direction need to be corrected. The control algorithm was tested on a solid single field template, the baseline case, and was able to achieve 1.3 nm overlay, which is consistent with the current method. The algorithm was then tested on the dual field concepts. The range of alignment errors needed to get 5 nm overlay are too tight for current manufacturing but the compliant concept did have more relaxed ranges than the solid dual field template. With more research, the compliant template concept might be changed to allow for wider ranges. The tests with correction in only one direction had promising data that should be investigated further. / text

In the postscript to The Concept of Law, H.L. A. Hart describes the on-going debate inspired by his book, focusing on the criticisms of Ronald Dworkin. In this essay, I will discuss Dworkin’s criticisms of Hart, as well as Hart’s responses, showing that while Hart responds adequately to some criticisms, he fails to respond adequately to others. I will also reconstruct and evaluate the arguments given for and against the separation thesis by Dworkin and Hart. Finally, I will argue that the debate about the separation thesis – the thesis that morality and law are separable – is misguided, conflating as it does two distinct questions. These are the questions of what the positive law is, that is, the law that is posited in a specific time and place, and of what the natural law is, that is, the law that (if it exists) is universal and timeless. Once we distinguish these questions, we will see that the answer to the question of whether law is separable from morality depends on which sense of ‘law’ is relevant, and that there are two different answers corresponding to the two senses of positive law and natural law. Positive law is separable from morality while natural law is not. / text

The Central Cordillera and Eastern Cordillera of the northern Andes form the western and eastern flanks of the north-trending Middle Magdalena Valley basin. Previous estimates for the timing of initial exhumation of the two cordilleras range from ~100 to ~10 Ma. Accurately constraining the spatial and temporal distribution of deformation in Colombia has implications for the shortening history of the Andean convergent margin and the prediction of rapid lateral facies changes in sedimentary basins in close proximity to sediment sources. This study applies sandstone petrographic point counts, field sedimentological analyses of basin fill, and paleocurrent measurements of trough cross-stratification, clast imbrication, and flute casts to provide new insights into the tectonic history of the flanks of the Middle Magdalena Valley basin. Between the lower and upper Paleocene strata of the Lisama Formation, paleocurrent orientations show a shift from northward to eastward transport. This change in sediment dispersal coincides with a shift from a cratonic (Amazonian) to orogenic (Andean) sediment source, as recorded by published U-Pb detrital zircon geochronological results (Nie et al. 2010), suggesting initial uplift of the Central Cordillera by mid-Paleocene time. Later in the basin’s history, establishment of an alluvial-plain system with meandering-channel deposits is recorded in lower–middle Eocene strata of the lower La Paz Formation. Consistent eastward paleocurrents characterize mid-Paleocene through uppermost Eocene strata, indicating a continuous influence of western sediment source areas. However, within the upper middle Eocene succession (~40 Ma), at the boundary between the lower and upper La Paz Formation, sandstone compositions show a dramatic decrease in lithic content. This compositional change is accompanied by a facies shift to amalgamated fluvial channels, reflecting changes in both the composition and proximity of the western sediment source. We attribute these changes to the growing influence of the exhumed La Cira/Infantas paleohighs off the western flank of the present-day Nuevo Mundo syncline. In the uppermost Eocene strata of the Esmeraldas Formation, paleocurrents show a switch to dominantly westward transport that persisted through the Neogene. In addition, deposits show a contemporaneous decrease in the amount of coarse-grained channel deposits. These changes are interpreted to reflect the onset of exhumation in the Eastern Cordillera. The lack of a significant change in sandstone compositions at this boundary suggests a compositional similarity between strata uplifted by the Lisama structure and the Eastern Cordillera. These data support and further refine previous thermochronologic and provenance studies which suggest that uplift-induced exhumation of the Central Cordillera and Eastern Cordillera commenced by mid-Paleocene and late Eocene–early Miocene time, respectively. / text