A great challenge in the volume-rendering field is to achieve high-quality images in an acceptable amount of time. In the area of volume rendering, there is always a trade-off between speed and quality. Applications where only high-quality images are acceptable often use the ray-casting algorithm, but this method is computationally expensive and typically achieves low frame rates. The work presented here is RZSweep, a new volume-rendering algorithm for uniform rectilinear datasets, that gives high-quality images in a reasonable amount of time. In this algorithm a plane sweeps the vertices of the implicit grid of regular datasets in depth order, projecting all the implicit faces incident on each vertex. This algorithm uses the inherent properties of a rectilinear datasets. RZSweep is an object-order, back-toront, direct volume rendering, face projection algorithm for rectilinear datasets using the cell approach. It is a single processor serial algorithm. The simplicity of the algorithm allows the use of the graphics pipeline for hardware-assisted projection, and also, with minimum modification, a version of the algorithm that is graphics-hardware independent. Lighting, color and various opacity transfer functions are implemented for giving realism to the final resulting images. Finally, an image comparison is done between RZSweep and a 3D texture-based method for volume rendering using standard image metrics like Euclidian and geometric differences.

Forest management is a costly and time-consuming activity. Remote sensing has the potential to improve the process by making it cheaper and more efficient, but only if appropriate characteristics can be determined from computer-models. This thesis describes the implementation of a forest visualization system and a corresponding user study that tests the accuracy of parameter estimation and forest characterization. The study uses data obtained from field-surveys to generate a computer-modeled forest. Five different stands were tested. Based on the quantitative results obtained, generally, there is no statistically significant difference in parameter estimation when comparing field-recorded movies and computer-generated movies.

No / The aim of the research is to identify and help to explain the unusual pattern of staining on the tunic, provide more specific information relating to the tunic's age and provenance and the chronology of alterations, and also inform the conservation decision-making process.

Thesis (Ph.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / Seeking to contribute clarity in understanding the essential characteristics of social science, the thesis this essay defends is that the legitimacy of "social science" as a distinct patterned activity oriented to attaining objective knowledge of humanity depends upon the recognition of its characteristic set of phenomena and that this set is comprised of meaningful behavior; this set was isolated by Max Weber in his major theoretical work and is the central subject matter of his empirical studies. Weber's approach and view is compared with that of the contemporary Chicago historian William H. Sewell, Jr.; specifically, examination of Sewell's view on the nature of the "social" leverages the importance of Weber's concept of "action" underlying "social action" and draws attention to the elemental importance of "action" for social science. Chapter 1 discusses science seen as a "social institution." In this context, the goal or end of "social science" is examined, and a discussion of Geertz' concept "cultural system" is introduced so as to offer clarity concerning the value of the concept of "social institution." Delineating the "social" for "social science" is argued to be essential for the testing of social scientific theories grounded in empirical phenomena. Chapter 2 engages Sewell's approach to the question of the "social" with a view toward the status of his response as an ontological claim and examines his definition of "semiotic practices." A theoretical discussion of the concepts of "action" and "social action" rooted in Weber's Economy and Society provides the framework for Chapter 3, and a discussion of the importance of explanation and understanding in Weber's view is developed. The central argument here is that the concept of "action" is elemental to Weber's approach. Chapter 4 looks forward and discusses the convergence of thought between Sewell and Max Weber and argues that the merits of this view are suggestive for contemporary scholarship. / 2999-01-01

Published Article / Research has two important objectives: the contribution to scientific discourse and the identification of solutions for the challenges societies, government, business and industry face. Research should be in the public domain. The publication and presentation of research results are important activities academics need to engage with. Through publications and presentations are societies informed of the positive influence and impact research can bring to them. This paper will focus on the importance of publications and how emerging scholars can be assisted to get their research published. A case study is presented of the Interim, an in-house academic journal.

This thesis comprises an empirical case study of scientific data production in oceanography and a philosophical analysis of the relations between newly created scientific data and the natural world. Based on qualitative interviews with researchers, I reconstruct research practices that lead to the ongoing production of digital data related to long-term developments of plankton biodiversity in the oceans. My analysis is centred on four themes: materiality, scientific representing with data, methodological continuity, and the contribution of non-scientists to epistemic processes. These are critically assessed against the background of today’s data-intensive sciences and increased automation and remoteness in oceanographic practices. Sciences of the world’s oceans have by and large been disregarded in philosophical scholarship thus far. My thesis opens this field for philosophical analysis and reveals various conditions and constraints of data practices that are largely uncontrollable by ocean scientists. I argue that the creation of useful scientific data depends on the implementation and preservation of material, methodological, and social continuities. These allow scientists to repeatedly transform visually perceived characteristics of research samples into meaningful scientific data stored in a digital database. In my case study, data are not collected but result from active intervention and subsequent manipulation and processing of newly created material objects. My discussion of scientific representing with data suggests that scientists do not extract or read any intrinsic representational relation between data and a target, but make data gradually more computable and compatible with already existing representations of natural systems. My arguments shed light on the epistemological significance of materiality, on limiting factors of scientific agency, and on an inevitable balance between changing conditions of concrete research settings and long-term consistency of data practices.

The thesis puts more emphasis on Scientific methodology,discuss Philosopher of Science--Paul Feyerabend's thinking. It discusses if science is a rational statement or not and has some reflections on how we think of Scientific methodology. In this reserch we can make a conclusion that Paul Feyerabend think Science doesn't have a so-called position.What we called "Science" today also follow a normal methodology.He suggest that we should get rid of the normal methodology and support the scientists do their reserch freely by using suitalbe methodology so human beings can devolop more knowledge probability

Thesis (Ph. D.)--University of Michigan. / eContent provider-neutral record in process. Description based on print version record.

Thesis (Ph. D.)--University of Michigan. / eContent provider-neutral record in process. Description based on print version record.

Indiana University-Purdue University Indianapolis (IUPUI) / Reproducible computing and research are of great importance for scientific investigation in any discipline. This thesis presents a general approach to provenance in the context of workflows for widely used script languages. Our solution is based on system integration, and is demonstrated by integrating MATLAB with VisTrails, an open source scientific workflow system. The integrated VisTrails-MATLAB system supports reproducible computing with truly prospective and retrospective provenance at multiple granularity levels as scientists choose for their scripts, and at the same time, is very easy to use.