The effects of graphical fidelity on player experience

Graphical assets in video games have become increasingly complex over the years, but little is known about their effect on player experience (PX). In this paper, we present results of a controlled study with 48 participants comparing how abstract and stylized graphics influence player experience in casual games. Our results show that high-fidelity graphics result in a more positive impression of the game. However, we also show that many effects are only present in the game with a more challenging mechanic. This shows that casual games can be compelling and enjoyable to play despite simplistic graphics, suggesting that small game developers and researchers need not focus on elaborate visuals to engage players. Copyright © 2013 ACM

Collagen Fibrillogenesis in Tissues, in Solution and from Modeling: A Synthesis

Collagen fibril formation has been studied in tissues by light and electron microscopy; in solution by light scattering and microscopy; and from modeling based on the amino acid sequence of type I collagen. Taken together these studies indicate that collagen fibril assembly involves a stepwise formation of intermediate aggregates in which each intermediate is formed from earlier aggregates. In this sequence, monomeric collagen contributes only to the formation of early aggregates; and fibrils grow in length by the addition of intermediate aggregates to the end of a subfibril and in width by lateral wrapping of subfibrils. Modeling based on amino acid sequence data of possible intermolecular charge-charge interactions indicate 2 different kinds, one which promotes linear aggregation and the other which promotes lateral aggregation. The effects of different colla-gens and coprecipitants such as glycoproteins and proteoglycans can begin to be explained by their influence on the character of intermediate subassemblies. Ultrastructural data from 2 tissues, embryonic cornea and tendon, indicate that the site of fibril growth and assembly is at the cell surface

Microwave coupled electron tunneling measurement of Co nanoparticles

We study electron tunneling through Co nanoparticles in the presence of repeated microwave pulses at 4.2K. While individual pulses are too weak to affect the magnetic switching field, repeated microwave pulses start to reduce the magnetic switching field at 10{\mu}s spacing. We use I-V curve as a thermometer to show that the microwave pulses do not heat the sample, showing that magnetization in Co nanoparticles is directly excited by microwave pulses, and the relaxation time of the excitation energy is in the range of microsecond.Comment: 10 pages, 5 figure

The False Dichotomy between Positive and Negative Affect in Game Play

Most of the time games make us happy, but sometimes they are frustrating or make us feel sad. They allow us to experience pleasure, success and joy, but they can also yield feelings of frustration, failure, or sorrow as a result of darker themes. In games, we can experience the full range of emotions ? both positive and negative. The workshop goals are to: 1) Investigate positive affect, negative affect, and the interplay between positive and negative affect as a means to create powerful gaming experiences; 2) Identify gaps in our existing knowledge regarding the full range of emotional experiences in games and their impact on the player and play experience; 3) Determine directions for research to advance knowledge in this space; and, 4) Create a community of people interested in developing games that involve powerful and meaningful player experiences. The organizers will provide the structure, questions, scaffolding of discussions, and workshop materials; whereas the participants will provide ideas through positions papers and discussion

Online Detection of Tonal Pop-Out in Modulating Contexts

We investigated the spontaneous detection of wrong notes in a melody that modulated continuously through all 24 major and minor keys. Three variations of the melody were composed, each of which had distributed within it 96 test tones of the same pitch, for example, A2. Thus, the test tones would blend into some keys and pop out in others. Participants were not asked to detect or judge specific test tones; rather, they were asked to make a response whenever they heard a note that they thought sounded wrong or out of place. This task enabled us to obtain subjective measures of key membership in a listening situation that approximated a natural musical context. The frequency of observed wrong-note responses across keys matched previous tonal hierarchy results obtained using judgments about discrete probes following short contexts. When the test tones were nondiatonic notes in the present context they elicited a response, whereas when the test tones occupied a prominent position in the tonal hierarchy they were not detected. Our findings could also be explained by the relative salience of the test pitch chroma in short-term memory, such that when the test tone belonged to a locally improbable pitch chroma it was more likely to elicit a response. Regardless of whether the local musical context is shaped primarily by bottom-up or topdown influences, our findings establish a method for estimating the relative salience of individual test events in a continuous melody

A Prismatic Analyser concept for Neutron Spectrometers

A development in modern neutron spectroscopy is to avoid the need of large samples. We demonstrate how small samples together with the right choice of analyser and detector components makes distance collimation an important concept in crystal analyser spectrometers. We further show that this opens new possibilities where neutrons with different energies are reflected by the same analyser but counted in different detectors, thus improving both energy resolution and total count rate compared to conventional spectrometers. The technique can be combined with advanced focusing geometries and with multiplexing instrument designs. We present a combination of simulations and data with 3 energies from one analyser. The data was taken on a prototype installed at PSI, Switzerland, and shows excellent agreement with the predictions. Typical improvements will be 2 times finer resolution and a factor 1.9 in flux gain compared to a Rowland geometry or 3 times finer resolution and a factor 3.2 in flux gain compared to a single flat analyser slab

Multi-Q mesoscale magnetism in CeAuSb2_2

We report the discovery of a field driven transition from a striped to woven Spin Density Wave (SDW) in the tetragonal heavy fermion compound CeAuSb$_2$. Polarized along $\bf c$, the sinusoidal SDW amplitude is 1.8(2) $\mu_B$/Ce for $T \ll T_N$=6.25(10) K with wavevector ${\bf q}_{1}=( \eta, \eta, \frac{1}{2} )$ ($\eta=0.136(2)$). For ${\bf H}\parallel{\bf c}$, harmonics appearing at $2{\bf q}_{1}$ evidence a striped magnetic texture below $\mu_\circ H_{c1}=2.78(1)$ T. Above $H_{c1}$, these are replaced by woven harmonics at ${\bf q}_{1}+{\bf q}_2=(2\eta, 0, 0)+{\bf c}^*$ until $\mu_\circ H_{c2}=5.42(5)$ T, where satellites vanish and magnetization non-linearly approaches saturation at 1.64(2) $\mu_B$/Ce for $\mu_\circ H\approx 7$ T.Comment: 5 pages, 4 figure

Images of psychiatry and psychiatrists

Peer reviewedPublisher PD