Tribal art market: signs and signals     

Guido Candela  Massimiliano Castellani  Pierpaolo Pattitoni 《Journal of Cultural Economics》2012,36(4):289-308

In this paper, we present a model for the marketability of a Tribal artwork, and we test this model empirically using a unique hand-collected dataset, which comprises the worldwide Tribal art market auctions between 1999 and 2008. Our results show a significant relationship between the probability of an artwork to be sold and several signs and signals. The effect of the auction estimated prices on the probability of sales is nonlinear and allows us to divide the Tribal art market into two price regimes. In the low-price regime, the effect of the auction estimated price on the probability of sales is negative. In the high-price regime, the effect of the auction estimated price on the probability of sales is positive.  相似文献   

School Characteristics,Child Work,and Other Daily Activities as Sleep Deficit Predictors in Adolescents from Households with Unsatisfied Basic Needs     

Daniel E. Vigo  Guido Simonelli  Ianina Tuñón  Daniel Pérez Chada  Daniel P. Cardinali  Diego Golombek 《Mind, Brain, and Education》2014,8(4):175-181

Sleep in adolescents has been shown to be an important factor when looking at physical, mental, and social well‐being. Little evidence is found regarding sleep patterns in adolescents from households facing extreme poverty, where conditions such as crowding, poor housing, sanitation or education, and precarious employment set an adverse environment for sleep. In this study, we sought to assess in a nationwide sample comprised of 1,682 adolescents from Argentina, how the presence of extreme poverty—as defined by the presence of unsatisfied basic needs (UBN)—affects the relationship of sleep duration with school, work, and other daily activities. A global high prevalence of short sleeping time, a slight increase of sleep time in adolescents with UBN, and different patterns of wake activities that predict sleep deficit, depending on the presence of UBN, were found. The poor academic achievement, increased risk of accidents, and adverse health outcomes associated with sleep deprivation support the view that sleep is an additional unsatisfied basic need that worsens living conditions at this age. The results may help to design public health policies that contribute to ameliorate this adverse situation.  相似文献   

Motivation of software developers in Open Source projects: an Internet-based survey of contributors to the Linux kernel   总被引：2，自引：0，他引：2  

Guido Hertel  Sven NiednerStefanie Herrmann 《Research Policy》2003,32(7):1159-1177

The motives of 141 contributors to a large Open Source Software (OSS) project (the Linux kernel) was explored with an Internet-based questionnaire study. Measured factors were both derived from discussions within the Linux community as well as from models from social sciences. Participants’ engagement was particularly determined by their identification as a Linux developer, by pragmatic motives to improve own software, and by their tolerance of time investments. Moreover, some of the software development was accomplished by teams. Activities in these teams were particularly determined by participants’ evaluation of the team goals as well as by their perceived indispensability and self-efficacy.  相似文献   

Investigating the effect of teaching as a generative learning strategy when learning through desktop and immersive VR: A media and methods experiment     

Sara Klingenberg  Maria L. M. Jørgensen  Gert Dandanell  Karen Skriver  Aske Mottelson  Guido Makransky 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2115-2138

  相似文献   

Syllabic Sructures in Typing: Evidence from Deaf Writers     

Guido?NottbuschEmail author  Angela?Grimm  Rüdiger?Weingarten  Udo?Will 《Reading and writing》2005,18(6):497-526

This study examined the time course of typing in prelingually and profoundly deaf as well as hearing individuals. Both groups of participants performed a written picture naming task and a written pseudoword task. Keystroke timing measurements from the written picture naming task revealed that the deaf as well as the hearing group were significantly delayed at syllable boundaries compared to identical within-syllable letter combinations. As the deaf are impoverished with respect to phonology based on spoken language experience, we postulate that syllabic segmentation is not crucially dependent on experience with spoken language. Furthermore, delays at syllable boundaries were not affected by word frequency in both groups, in contrast to the keys straddling a root morpheme boundary. Together with the finding that delays at syllable boundaries also occur in pseudowords, the experiments provide strong evidence towards post-lexical syllabification processes. Our results support previous findings which claim that (1) orthosyllables are autonomous and mode-specific entities, and (2) that the principles of syllabic organisation apply post-lexically.  相似文献   

Social capital,affect balance and personal well-being among teachers in Israel and Palestine     

Guido Veronese  Alessandro Pepe  Jamal Dagdukee  Shaher Yaghi 《Teachers and Teaching》2018,24(8):951-964

Informed by a perspective centred on psychological health and well-being, the present research investigated whether teachers’ overall well-being was influenced by their affect balance, as well as the extent to which both affect and well-being are influenced by social capital, in conflict-ridden areas such as the occupied Palestinian Territories (Gaza Strip and West Bank). The study involved three cohorts of Palestinian teachers working in Israel, Gaza and the West Bank, respectively (N = 153). Dynamics of social exclusion, religious difference, educational disparity, poor educational standards and a lack of opportunity are factors affecting Palestinian teachers in both Israel and the occupied Palestinian territories. The results supported the hypothesis that emotional balance directly influences teachers’ well-being. Teachers with higher levels of positive affect reported greater personal well-being than those with higher levels of negative affect. Social capital also positively influenced teachers’ personal well-being, both directly, and indirectly by fostering positive emotions. These results suggest that availability of community resources plays a key role in promoting teachers’ well-being.  相似文献   

Benefits of Taking a Virtual Field Trip in Immersive Virtual Reality: Evidence for the Immersion Principle in Multimedia Learning     

Makransky  Guido  Mayer  Richard E. 《Educational Psychology Review》2022,34(3):1771-1798

Educational Psychology Review - This study describes and investigates the immersion principle in multimedia learning. A sample of 102 middle school students took a virtual field trip to Greenland...  相似文献   

Immersive virtual reality in STEM: is IVR an effective learning medium and does adding self-explanation after a lesson improve learning outcomes?     

Elme  Liisalotte  Jørgensen  Maria L. M.  Dandanell  Gert  Mottelson  Aske  Makransky  Guido 《Educational technology research and development : ETR & D》2022,70(5):1601-1626

Educational technology research and development - The goal of the current study was to investigate the effects of an immersive virtual reality (IVR) science simulation on learning in a higher...  相似文献   

Argumentación y conocimiento científico escolar     

Ma Antonia Candela 《Infancia y Aprendizaje》2013,36(55):13-28

Resumen

En este artículo se analiza el contexto interactivo que propicia la participación de los alumnos en la construcción social del conocimiento de ciencias naturales en la escuela primaria. La descripción se centra en las intervenciones de los alumnos, elaboradas en interacción con el docente, en las que expresan explicaciones alternativas y argumentan sus ideas.  相似文献   

Improved determination of mechanical power output in rowing: Experimental results     

Lotte L. Lintmeijer  Mathijs J. Hofmijster  Guido A. Schulte Fischedick  Patrick J. Zijlstra  A. J. “Knoek” Van Soest 《Journal of sports sciences》2018,36(18):2138-2146

In rowing, mechanical power output is a key parameter for biophysical analyses and performance monitoring and should therefore be measured accurately. It is common practice to estimate on-water power output as the time average of the dot product of the moment of the handle force relative to the oar pin and the oar angular velocity. In a theoretical analysis we have recently shown that this measure differs from the true power output by an amount that equals the mean of the rower’s mass multiplied by the rower’s center of mass acceleration and the velocity of the boat. In this study we investigated the difference between a rower’s power output calculated using the common proxy and the true power output under different rowing conditions. Nine rowers participated in an on-water experiment consisting of 7 trials in a single scull. Stroke rate, technique and forces applied to the oar were varied. On average, rowers’ power output was underestimated with 12.3% when determined using the common proxy. Variations between rowers and rowing conditions were small (SD = 1.1%) and mostly due to differences in stroke rate. To analyze and monitor rowing performance accurately, a correction of the determination of rowers’ on-water power output is therefore required.  相似文献