Media Research Center

About: Media Research Center is a based out in . It is known for research contribution in the topics: Collaborative learning & Educational technology. The organization has 491 authors who have published 950 publications receiving 28581 citations. The organization is also known as: MRC.

Fabrication of servo-integrated template for 1.5 Teradot/inch 2 bit patterned media with block copolymer directed assembly

Abstract: Directed self-assembly (DSA) of block copolymers (BCPs) proves to be a viable solution for the ultrahigh density bit-patterned media (BPM) application. However, servo design integration is still extremely challenging since the servo layouts require more complex patterns than the simple arrays naturally achieved by the DSA process. We present an integration scheme to create BPM servo patterns by utilizing the BCP dot-array patterns. This proposed method is based on an imprint guided two-step DSA process, combined with conventional optical lithography to define two separate zones. Both the data zone and servo zone consist of self-assembled hexagonal dot arrays: a regular pattern in the data zone and an arbitrary pattern in the servo zone. This method was successfully used to fabricate a servo-integrated BPM template with an areal density of 1.5 Teradot/inch2 (Td/in.2) (Lo=22.3 nm). Using the fabricated quartz template, CoCrPt BPM media has been successfully patterned by nanoimprint lithography and subsequent ion-beam etching process on a 2.5 in. disk. Further, using patterned-in servo wedges on 1.5 Td/in.2 patterned CoCrPt media, we are able to close the servo control loop for track-following on a spin-stand test. The standard deviation of repeatable run-out over the full revolution is calculated to be about 4% of the 38.6 nm track pitch. This method is currently being used to fabricate a template at a much higher density of 3.2 Td/in.2 (Lo=15.2 nm).

Will your words become mine? underlying processes and cowitness intimacy in the memory conformity paradigm.

Abstract: Eyewitness reports become less accurate after exposure to inconsistent information. When such phenomenon of diminishing accuracy occurs among cowitnesses, it is termed memory conformity or the social contagion effect. The present study set out to provide a rigorous test of the underlying mechanisms with particular emphasis on investigating whether genuine false memory is involved. To this end, we conducted an earwitness experiment in which some participants were exposed to discrepant cowitness information and provided their recollections repeatedly and under different conditions. Additionally, we examined the impact of cowitness intimacy by using a random assignment procedure, an aspect that has not been previously studied. With regard to the underlying processes, our findings clearly argue that informational rather than normative influence plays a dominant role. Moreover, highly accurate source attributions indicated that participants were aware of drawing on the recollection of their counterparts. Consequently, we did not obtain any evidence for false memory. With regard to cowitness intimacy, the results were inconsistent and call for further research.Keywords: memory conformity, misinformation effect, social contagion, source memory, witness memoryEyewitness evidence still poses a dilemma. On the one hand, it constitutes an important contribution to criminal investigation (Wells, Memon, & Penrod, 2006). On the other hand, a large body of literature has revealed that memory reports reflect a fallible and malleable source of information (for a review see Steffens & Mecklenbrauker, 2007). One particularly important aspect within this context regards the presentation of postevent information. That is, after having witnessed an event, people may be exposed to the recollections of other witnesses, media reports or questions of police officers that contain information referring to the incident. This information may be inconsistent with one's own recollections, in that it contains additional or even contradictory details. For almost four decades now, researchers have addressed this issue and investigated the impact of discrepant postevent information on witness accounts (Loftus, Miller, & Burns, 1978). The typical finding is that participants are less likely to report the original information when misleading postevent information has been presented, compared with a control condition that included instead no information, neutral information or information consistent with the original (e.g.. Belli, Windshitl, McCarthy, & Winfrey, 1992; Intraub & Hoffmann, 1992; Payne, Toglia, & Anastasi, 1994).Research regarding this misinformation effect (Loftus, 1979) mostly involved the presentation of postevent information that was embedded in "nonsocial" sources such as narratives (e.g., Wright & Stround. 1998). More recently, some studies have investigated the influence of postevent information that had been introduced by a real person such as a confederate (e.g., Allan & Gabbert, 2008; Schneider & Watkins, 1996) or another participant (e.g., Gabbert, Memon, & Allan, 2003; Garry, French, Kinzett, & Mori, 2008; Meade & Roediger, 2002; Mori & Mori, 2008; Wright & Schwartz., 2010; Wright, Self, & Justice, 2000). The relevance of this approach has become even more evident since Paterson and Kemp (2006) conducted a survey among witnesses and found that 86% of them had discussed their memories with another witness before talking to the police (see Skagerberg & Wright, 2008 for a smaller, but nevertheless substantial and relevant percentage: 58%). The detrimental effect on witnesses' memory of inconsistent postevent information from other people has been documented as well and has been termed social contagion (Meade & Roediger, 2002) or memory conformity (Wright, Memon, Skagerberg, & Gabbert, 2009). Two papers that compared cowitnesses and narratives as sources for inconsistent information the effects were stronger for cowitnesses (Gabbert, Memon, Allan, & Wright, 2004; Paterson & Kemp, 2006). …

Effects of Contributor Experience on the Quality of Health-Related Wikipedia Articles.

Abstract: Background: Consulting the Internet for health-related information is a common and widespread phenomenon, and Wikipedia is arguably one of the most important resources for health-related information. Therefore, it is relevant to identify factors that have an impact on the quality of health-related Wikipedia articles. Objective: In our study we have hypothesized a positive effect of contributor experience on the quality of health-related Wikipedia articles. Methods: We mined the edit history of all (as of February 2017) 18,805 articles that were listed in the categories on the portal health & fitness in the English language version of Wikipedia. We identified tags within the articles’ edit histories, which indicated potential issues with regard to the respective article’s quality or neutrality. Of all of the sampled articles, 99 (99/18,805, 0.53%) articles had at some point received at least one such tag. In our analysis we only considered those articles with a minimum of 10 edits (10,265 articles in total; 96 tagged articles, 0.94%). Additionally, to test our hypothesis, we constructed contributor profiles, where a profile consisted of all the articles edited by a contributor and the corresponding number of edits contributed. We did not differentiate between rollbacks and edits with novel content. Results: Nonparametric Mann-Whitney U-tests indicated a higher number of previously edited articles for editors of the nontagged articles (mean rank tagged 2348.23, mean rank nontagged 5159.29; U=9.25, P<.001). However, we did not find a significant difference for the contributors’ total number of edits (mean rank tagged 4872.85, mean rank nontagged 5135.48; U=0.87, P=.39). Using logistic regression analysis with the respective article’s number of edits and number of editors as covariates, only the number of edited articles yielded a significant effect on the article’s status as tagged versus nontagged (dummy-coded; Nagelkerke R2 for the full model=.17; B [SE B]=-0.001 [0.00]; Wald c2 [1]=19.70; P<.001), whereas we again found no significant effect for the mere number of edits (Nagelkerke R2 for the full model=.15; B [SE B]=0.000 [0.01]; Wald c2 [1]=0.01; P=.94). Conclusions: Our findings indicate an effect of contributor experience on the quality of health-related Wikipedia articles. However, only the number of previously edited articles was a predictor of the articles’ quality but not the mere volume of edits. More research is needed to disentangle the different aspects of contributor experience. We have discussed the implications of our findings with respect to ensuring the quality of health-related information in collaborative knowledge-building platforms.

Development of directional olfactory display

Abstract: When we display the olfactory information in VR, the controlled release of aroma to stimulate olfactory organ is an important factor. In fact, temporal and spatial control of aroma constituent is the elemental technology. The long-term preservation of the aromatic materials and the miniaturization of olfactory display are also desirable. Most traditional researches on olfactory displays focused on temporal control of aroma, but the importance of spatial control of aroma was not well realized. In addition, some of previous olfactory displays used liquid-type aromatic materials, which were nondurable. In this research, we generated directional air flow with aromas by using micro air flow source. With this approach, spatial control of aroma and miniaturization of olfactory display were achieved. Furthermore, we were able to extend the duration of aromatic materials, as the aroma source enclosed in a calcium silicate was encapsulated inside the nearly-sealed device.