Game Over? How Video Game Console Makers are Speeding Toward an Antitrust Violation

There has been a recent trend in the video game industry that console makers (Sony, Microsoft, and Nintendo) have been acquiring video game developers to make games solely for their console. With a surge of acquisitions, these three console makers have rapidly increased their market share of the console video game industry. But in doing so, have they started to run afoul of antitrust law? Do these three console makers now have enough market power to exert control over the video game industry like a monopoly? This article seeks to answer these questions, while also suggesting several steps that console makers can take now to avoid the head-ache that is an antitrust violation in the future

Small scale vacuum chamber for general use

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.Cataloged from PDF version of thesis.For this thesis a small scale vacuum chamber assembly was designed and fabricated. This chamber's purpose is to provide high quality vacuum conditions for a variety of samples. Often these samples are in need of precise temperature control. An ultra-high vacuum remains the best environment to provide precise and efficient temperature (not accounting for the energy needed to evacuate the chamber). Once completed the vacuum chamber basically consists of a base plate upon which the chamber assembly is mounted. Additional accessories were designed into the assembly to aid in the disassembly of the chamber. Ideally, the user would mount their sample to a flange that possesses a sample holder. That flange can then be mounted to a rail for easy insertion into the chamber. The compact size of the chamber combined with the easy removal and installation of the sample will expedite experimentation. Moreover, the simple design will allow for easy use by a broad spectrum of users in need of precise temperature control.by Alexander P. Clayton.S.B

Remote sensing of subglacial bedforms from the British Ice Sheet using an Unmanned Aerial System (UAS): Problems and Potential.

Photogrammetry can be applied to the results of UAS (Unmanned Aerial Systems) based photographic surveys to produce high resolution DEMs (Digital Elevation Models) of small areas (c. 1 km2). However, this method has not been widely used in academia due to photogrammetric programmes working poorly with the ill constrained intrinsic and extrinsic properties that often accompany UAS based photographs. In this study a PAMS (Personal Aerial Mapping System) SmartOne B UAS was used to provide image sets for testing a number of different photogrammetry packages; LPS, Bundler, PhotoSynth and PhotoScan, with the aim of producing sub-metric accuracy DEMs with a low complexity methodology and without significant financial investment. To demonstrate the potential use of a UAS photogrammetric survey methodology it was applied here to an investigation into scale dependant remote sensing of glacial geomorphology. Subglacial bedforms, landforms produced by the flow of ice over land, are thought to ‘seed’ with a minimum horizontal dimension of 100 m. This hypothesis is based on surveys of bedforms across the UK and Ireland using NEXTMap DEMs with 1 m accuracy and 5 m resolution. Here we test that hypothesis using sub-metric accuracy DEMs produced via photogrammetry of an area in the Eden Valley drumlin field, NW England. The UAS was found to be suitable for this type of survey, but only one of the four photogrammetry programmes provided an effective and low complexity methodology. This programme, PhotoScan, was shown to require minimal user training and could produce DEMs from the survey imagery on the day of flying with a standard high performance computer at a resolution of 0.12 m2. The DEM produced was down sampled and validated against pre-existing 1 m LiDAR (Light Detection And Ranging) data of the same area. It showed poor absolute accuracy due to a systematic parabolic error introduced during processing that made quantification of the DEM error problematic. However, estimates of the error additional to this systematic error put it at around 0.5 m which makes the DEM suitable for mapping low amplitude bedforms. Use of the DEM for mapping subglacial bedforms yielded ambiguous results. 17 additional linear ridges were identified that were not visible on the NEXTMap DEM. Their dimensions were not remarkably shorter than the 100 m limit, with only 6 measuring <100 m, but their width was much narrower than those mapped previously. However, whilst these dimensions could suggest that bedforms do not ‘seed’ at a certain size and may fine into smaller features such as flutes, there was no way to demonstrate that they were in fact glacial in origin. This highlighted that whilst sub-metric resolution DEMs are undoubtedly highly useful tools in the survey of glacial bedforms, they may require additional data from field investigations in order for robust conclusions to be drawn due to the numerous processes capable of produce geomorphic features at a sub-metric vertical scale

Simulating the Flow of Students Through Cal Poly\u27s Undergraduate Industrial Engineering Program for Policy Analysis

The purpose of this project is to analyze the flow of Industrial Engineering students at California Polytechnic University San Luis Obispo in order to measure various graduation metrics by use of a simulation. Currently, graduation rates are relatively low in comparison with the rest of the state of California and future growth and decreased budgets may threaten graduation rates for incoming students. This simulation will identify bottleneck classes [those that hold up students from graduating] and provide a basis for a sensitivity analysis in which different scenarios are constructed to determine their effects on graduation metrics. The simulation will offer a Microsoft Excel Spreadsheet as an input in which any user could alter class capacities and offerings so as to determine the effects of these decisions. This tool provides a valuable resource for the Department Chair of the Industrial and Manufacturing Department at California Polytechnic University San Luis Obispo because it provides a high-level view of the impact of important decisions for the department. The project concludes with a sensitivity analysis of eight different cases that are analyzed to provide insight into whether or not certain decisions should be made about the curriculum. Of the many conclusions determined from the sensitivity analysis, it is noted that the department can sustain a 10% increase in enrollment of new students, but not a 20% increase in enrollment, while maintaining current graduation rates. Furthermore, the elimination of pass and fail rates from the system does not provide a significant effect on graduation rates and it is recommended that they stay in place. Additionally, it is noted that a reduction in capacity of 10% across all classes is very harmful to students while the adjustment of classes based on effective capacities [the percentage of Industrial Engineering students enrolled multiplied by class capacity] is highly beneficial. It is the hope that this simulation tool can be used by the department in making decisions similar to this in the future

Long-term observations of terminus position change, structural glaciology and velocity at Ninnis Glacier, George V Land, East Antarctica (1963-2021)

Over the last four decades, some major East Antarctic outlet glaciers have undergone rates of retreat, thinning and acceleration in response to ocean-climatic forcing. However, some major East Antarctic outlet glaciers remain unstudied in the recent past. Ninnis Glacier is one East Antarctic outlet glacier that is potentially vulnerable to future ocean-climate change and requires monitoring. This thesis quantifies and analyses long-term (1963-2021) changes in terminus position, structural glaciology and velocity at Ninnis Glacier. The results of this study show that Ninnis underwent three major calving events (in 1972-1974, 1998 and 2018), characterised by a 20–25-year periodicity and indicative of a naturally occurring cycle. Each respective calving event created a large-scale tabular iceberg and formed a new terminus position at similar locations up-ice relative to Ninnis’ 1992 grounding line position. The major calving events in 1998 and 2018 were controlled by the development of a central rift system that appears in the same location on Ninnis’ tongue, reinforcing the notion of a predictable calving cycle. Ice flow velocity trends before the 2018 calving event (2017-2018) revealed no discernible change in velocity immediately up-ice (+0.2 %) and down-ice (>0 %) of the 1992 grounding line, suggesting that rifting took place within a ‘passive’ sector of Ninnis’ ice tongue. Between 2018 and 2021, Ninnis underwent a pervasive deceleration up-ice (-2.1 %) and down-ice (-1.4 %) of the 1992 grounding line and on the distal ice tongue (-18.7 %). This indicated that the 2018 calving event did not result in the loss of dynamically important ice. Although Ninnis has previously been deemed a sector at risk of retreat, it is concluded that Ninnis is not currently undergoing Marine Ice Sheet Instability and is not currently sensitive to external forcing. This is consistent with low basal melt rates, negligible grounding line retreat and low thermal forcing temperatures in the coastal waters observed at Ninnis

Exploring prose style in scholarly journal articles in journalism and communications : do editors believe there is a need for change?

Academic prose style has been criticized by some academics as willfully obtuse, intentionally opaque and impossible for anyone but an academic to understand. This research uses the theoretical lens of critical discourse analysis and framing theory to determine if academic prose style is problematic in journalism and communications scholarly publications. In-depth interviews of 10 academic journal editors show that academic prose is problematic. Editors agree that academic prose is used for power, control and inclusion/exclusion. Perceptions about academic jargon or language, too, suggest that academics use their words for matters well beyond knowledge sharing. Editors desire change, but they don't believe forces such as open access to scholarship will improve academic prose style. Academic culture as it relates to academic writing is studied via editor values and beliefs

Supernova Reverse Shocks and SiC Growth

We present new mechanisms by which the isotopic compositions of X-type grains of presolar SiC are altered by reverse shocks in Type II supernovae. We address three epochs of reverse shocks: pressure wave from the H envelope near t = 10$^6$s; reverse shock from the presupernova wind near 10$^8-10^9$s; reverse shock from the ISM near 10$^{10}$s. Using 1-D hydrodynamics we show that the first creates a dense shell of Si and C atoms near 10$^6$s in which the SiC surely condenses. The second reverse shock causes precondensed grains to move rapidly forward through decelerated gas of different isotopic composition, during which implantation, sputtering and further condensation occur simultaneously. The third reverse shock causes only further ion implantation and sputtering, which may affect trace element isotopic compositions. Using a 25M$_{\odot}$ supernova model we propose solutions to the following unsolved questions: where does SiC condense?; why does SiC condense in preference to graphite?; why is condensed SiC $^{28}$Si-rich?; why is O richness no obstacle to SiC condensation?; how many atoms of each isotope are impacted by a grain that condenses at time t$_0$ at radial coordinate r$_0$? These many considerations are put forward as a road map for interpreting SiC X grains found in meteorites and their meaning for supernova physics.Comment: 28 pages, 14 figures, animation for Figure 3 and machine-readable Table 3 can be found at http://antares.steelangel.com/~edeneau/supernova/DHC_2003, Submitted to Ap

A scalar-tensor cosmological model with dynamical light velocity

The dynamical consequences of a bimetric scalar-tensor theory of gravity with a dynamical light speed are investigated in a cosmological setting. The model consists of a minimally-coupled self-gravitating scalar field coupled to ordinary matter fields in the standard way through the metric: \metric_{\mu\nu}+B\partial_\mu\phi\partial_\nu\phi. We show that in a universe with matter that has a radiation-dominated equation of state, the model allows solutions with a de Sitter phase that provides sufficient inflation to solve the horizon and flatness problems. This behaviour is achieved without the addition of a potential for the scalar field, and is shown to be largely independent of its introduction. We therefore have a model that is fundamentally different than the potential-dominated, slowly-rolling scalar field of the standard models inflationary cosmology. The speed of gravitational wave propagation is predicted to be significantly different from the speed of matter waves and photon propagation in the early universe.Comment: 12 pages, uses amsart and amssymb. Minor corrections, to appear in Phys. Lett.