Regional cerebral blood flow, an index of local neuronal activity, was measured using positron emission tomography (PET) during the performance classic Stroop color/word task in eight healthy right-handed subjects. In first condition this paradigm, subjects name color words presented on a video monitor. All are names congruent to (e.g., noun "red" displayed red color). second condition, also However, these trials all incongruent green The difference brain activity between two conditions...

The authors explored the question of whether acute, transient changes in mood are reflected activation discrete neuronal systems human brain.Using positron emission tomography, they measured regional cerebral blood flow (CBF) seven psychiatrically healthy subjects under two conditions. During control condition were resting with their eyes closed. active condition, still closed, asked to imagine or recall a situation that would make them feel very sad. They explicitly experience sadness and...

This study compared the educational effects of computer simulations developed in a hyper-realistic virtual environment with either traditional schematic or optics laboratory. The was constructed on basis Java applets complemented photorealistic visual output. new concept, which we call hyper-realistic, transcends basic simulation; it provides user more realistic perception physical phenomenon being simulated. We learning achievements three equivalent, homogeneous groups undergraduates---an...

Federated Learning has emerged as a promising approach for maintaining data privacy across distributed environments, enabling training on diverse range of devices from high-performance servers to low-power gadgets. Despite its potential, managing numerous sources can strain these devices, particularly those with limited capabilities, leading increased latency. This is especially critical in virtual reality, where real-time responsiveness crucial due the need constant connectivity....

Color measurements have traditionally been linked to expensive and difficult handle equipment. The set of mathematical transformations that are needed transfer a color we observe in any object doesn’t emit its own light (which is usually called color-object) so it can be displayed on computer screen or printed paper not at all trivial. This requires thorough knowledge spaces, colorimetric management systems. TCS3414CS sensor (I2C Sensor Grove), system for capturing, processing allows the...

Head-mounted displays allow us to go through immersive experiences in virtual reality and are expected be present more applications both recreational professional fields. In this context, recent years have witnessed significant advances rendering techniques following physical models of lighting shading. The aim paper is check the fidelity visual appearance real objects captured a 3D scanner, rendered personal computer displayed device. We compared forward versus deferred real-time computing...

We study the misconceptions about colour that most people hold, determining general phenomenological laws govern them. Concept mapping was used to combat which were found in application of a test specifically designed determine these misconceptions, while avoiding possible misleading inductions could have arisen from use everyday language. In particular, care taken avoid distorting effect verb 'to be' applied coloured objects on responses. The shown an internal consistency form authentic...

It is well known that there are different preferences in correlated color temperature of light sources for daily living activities or viewing artistic paintings. There also data relating the capacity observers to make judgments on differences with spectral power distribution source used. The present work describes a visual discrimination experiment whose results confirm existence relationship between and capacities observers.

To characterize the familiality of cognitive dysfunction in schizophrenia, we studied performance on three tasks (visuospatial attention; visuolinguistic conflict, arrow-word; and Wisconsin Card Sorting Test [WCST]) by monozygotic (MZ) dizygotic (DZ) twin pairs discordant for schizophrenia. The subject sample consisted six MZ pairs, nine DZ one nonschizophrenia cotwin a patient with There were two sources dysfunction: nonheritable, state component heritable, trait component. Deficits...

Abstract It is well known that men and women may experience, perceptually cognitively, the appearance of color differently. One possible physiological factors underlying these differences a sexual dimorphism in gene encodes photopigment long‐wavelength‐sensitive cones retina, manifest different frequency expression women. The present work describes psychophysical experiment revealed significant perception between women, consequently advises separate treatment two populations. © 2007 Wiley...

In a previous work [J. Opt. Soc. Am. A29, A209 (2012)], we presented visual color discrimination experiment whose results established the existence of relationship between correlated temperature (CCT) light source and capacities observers. The indicated statistically significant difference in unequal sample pairs when using sources different temperatures, with capacity being greater higher source's temperature. That employed an RGBA–LED configured three temperatures: 2800, 5000, 6500 K....

We have used 13 experimental datasets (7420 colour pairs) to study the performance of weighting function for lightness proposed by CIEDE 2000 colour‐difference formula, because it has been suggested that this can be improved using S L = 1 adopted CIE 94 formula. Using standardised residual sum squares ( STRESS ) index, was found that: (i) replacing in with results 7/13 considered, but improvement statistically significant only 1/13 datasets; (ii) a Whittle‐type lightness‐difference formula...

Abstract In this work, we present an online test designed to ascertain what type of misconceptions people may have about color perception. It is noteworthy that only 15.7% the over 20,000 respondents answered correctly, and vast majority (78.2%) incorrect response patterns on our matched just four sequences, corresponding with types misconceptions. © 2016 Wiley Periodicals, Inc. Col Res Appl 41, 325–329,

Virtual reality has reached a great maturity in recent years. However, the quality of its visual appearance still leaves room for improvement. One most difficult features to represent real-time 3D rendered virtual scenes is color fidelity, since there are many factors influencing faithful reproduction color. In this paper we introduce method improving fidelity systems based rendering systems. We developed management system divided into two levels. At first level, applied only light sources...

Wireless Communication technologies are in continuous evolution. Around the world, many Universities try to provide innovative laboratory courses train their students this field. In paper, a ubiquitous course for wireless communications is described. The has been designed so that have complete six different experiments. Three of these experiments use advanced professional network testing tools order practical experience simulation tools. Two additional implemented hands-on measurements...

There are many spontaneous conceptions related to the principle of action and reaction for two bodies in static contact. A study a broad sample students showed Newton's third law be great unknown most them. The were found consistent, forming authentic minitheories (implicit theories) with general laws governing interactions. This consistency evolves over course students' education, reflecting changes their modes learning.

In recent years, there have been very important advances in graphic computing and technology related to the capture representation of real objects both 2 3 dimensions. One these technologies is virtual reality, which can be incorporated into common tasks research laboratories, especially laboratories color vision lighting research. To incorporate reality devices tasks, newly developed applications must validated with existing known tests or techniques. The objective this work was study...