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The major goal of this study was to empirically compare text-plus-mobile phone learning using an integrated 2D barcode tag in a printed text with three other conditions described in multimedia learning theory. The method examined in the study involved modifications of the instructional material such that: a 2D barcode was used near the text, the learner scanned the tag with the camera on his/her mobile phone and reached the animation and narration on the mobile phone's screen. Using this method, we created a new approach that reinforces printed textbooks, which had the poorest retention and transfer results. The results suggest that supporting a printed textbook with camera-equipped mobile devices and 2D barcodes linked to supplemental information, may increase the effectiveness of learning. 相似文献
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Online information sources, such as pictures and animations on web pages are frequently used for complementing printed course material in educational contexts. The concurrent use of online and printed information sources by students, however, requires going back and forth between physically separated course material, such as a course book and a computer screen, thus leading to suboptimal learning outcomes. Compatible with the principles identified by the recent theoretical frameworks for multimedia learning, mobile technology provides learners with the opportunity to bring online and printed course material close together. Mobile phones make online information available within a small desktop space, in close proximity to printed course material. The challenges that are relevant to text input methods can be overcome by the 2D barcode technology. This study investigates the use of camera-equipped mobile phone and 2D barcode technology as an alternative to the use of computer screen for complementing printed course material. The results of the experimental investigation suggest that, by facilitating the access to online information sources by 2D barcode tags on course books, mobile phones have the potential to enhance learning. 相似文献
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随着物联网技术的广泛应用和手机的普及,为了能低成本、大规模地应用微光学标签,文章根据Bokode标签原理,设计并制作了一种集成化微光学标签系统。它的发射端采用集成化方式,即微型二维码与小透镜阵列集成,接收端可采用普通手机相机接收微型二维码图像,并利用手机中的解码软件来解码。 相似文献
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2008年,中科院张松懋研究员提出了将3D动画自动生成技术应用在手机短信中.短信情感分析是手机3D动画自动生成系统的一个重要环节.目前系统中使用的方法是传统的机器学习方法,准确率较低,无法达到实用的目的.而近几年,深度学习在情感分析任务中取到了较好的效果,卷积神经网络可以自动提取短信中的语义情感特征,且注意力机制可以自动为词加权获取信息.为此,本文提出将深度学习中的注意力机制和卷积神经网络相结合应用于手机短信自动生成系统中的情感分类.实验表明,基于注意力机制的卷积神经网络比之前的方法准确率、召回率和F值都有明显的提高. 相似文献
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具有摄像功能的手机已经成为一种便捷的二维条码阅读器,但手机因为本身的限制造成拍摄图像模糊,影响了后续的条码识别。本文提出了一种适合在手机平台上的图像盲恢复方法,以QR码识别为应用目的,利用QR码图像的灰度分布特点,通过模糊图像的边缘响应计算得到PSF函数,再进行图像恢复。实验证明,本文提出的方法具有去模糊效果好、计算简单的特点,适合手机等嵌入式平台的实时应用。 相似文献
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While many researches have analyzed the psychological antecedents of mobile phone addiction and mobile phone usage behavior, their relationship with psychological characteristics remains mixed. We investigated the relationship between psychological characteristics, mobile phone addiction and use of mobile phones for 269 Taiwanese female university students who were administered Rosenberg’s self-esteem scale, Lai’s personality inventory, and a mobile phone usage questionnaire and mobile phone addiction scale. The result showing that: (1) social extraversion and anxiety have positive effects on mobile phone addiction, and self-esteem has negative effects on mobile phone addiction. (2) Mobile phone addiction has a positive predictive effect on mobile phone usage behavior. The results of this study identify personal psychological characteristics of Taiwanese female university students which can significantly predict mobile phone addiction; female university students with mobile phone addiction will make more phone calls and send more text messages. These results are discussed and suggestions for future research for school and university students are provided. 相似文献
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《Ergonomics》2012,55(1):30-42
The effects of mobile phone use on cycling behaviour were studied. In study 1, the prevalence of mobile phone use while cycling was assessed. In Groningen 2.2% of cyclists were observed talking on their phone and 0.6% were text messaging or entering a phone number. In study 2, accident-involved cyclists responded to a questionnaire. Only 0.5% stated that they were using their phone at the time of the accident. In study 3, participants used a phone while cycling. The content of the conversation was manipulated and participants also had to enter a text message. Data were compared with just cycling and cycling while listening to music. Telephoning coincided with reduced speed, reduced peripheral vision performance and increased risk and mental effort ratings. Text messaging had the largest negative impact on cycling performance. Higher mental workload and lower speed may account for the relatively low number of people calling involved in accidents. Statement of Relevance: Although perhaps mainly restricted to flat countries with a large proportion of cyclists, mobile phone use while cycling has increased and may be a threat to traffic safety, similar to phone use while driving a car. In this study, the extent of the problem was assessed by observing the proportion of cyclists using mobile phones, sending questionnaires to accident-involved cyclists and an experimental study was conducted on the effects of mobile phone use while cycling. 相似文献
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Two-dimensional (2D) barcode symbology is an emerging technology used for compactly storing and retrieving information. These barcodes can be found on the back of drivers' licenses and are encoded with secure text data. Standard 2D barcode such as PDF417 uses upper and lowercase alphabets, numeric digits and special characters for encoding. Some barcodes also include a compressed photo of the individual. The visual quality of the compressed image is usually poor and occupies a large amount of space which greatly reduces the capacity needed for encoding text. This paper presents a novel approach for embedding uncompressed images in a standard PDF417 2D barcode using a blind digital watermarking technique. The text is encoded in the standard PDF417 format with error correction, while the face and fingerprint images are watermarked in the encoded 2D barcode. Experimental results show that the proposed technique effectively increased the standard capacity of the PDF417 2D barcode without altering the contents of the encoded data. The results also show that the visual quality of the extracted photo image is high. The extracted fingerprint image when compared with the original fingerprint using an AFIS system yielded a high matching score. 相似文献
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Two-dimensional barcodes (2D codes) are currently used to authenticate airplane boarding passes and online payments. However, little attention has been paid to the malicious replication or fabrication of 2D codes. In a previous study, the authors have proposed a semi-fragile watermark to distinguish an authentic 2D code from a replicated one and have attempted to design the watermarking scheme automatically using optimization. The optimization of a watermark extraction algorithm and watermarking scheme for stable watermark extractions from 2D codes displayed on various display types is the actual desire. However, it is difficult to formulate the two tasks, as a unified optimization problem and solve it with an optimization algorithm because the two problems have different structures and properties. Consequently, this study proposes a sparsely synchronized heterogeneous coevolutionary method for the simultaneous optimization of a watermark embedding scheme and extracting algorithm to detect the replication of 2D codes displayed on mobile phone screens. Experimental results have shown that the proposed method can design a watermark with desirable semi-fragileness that works well on different types of mobile phone displays. 相似文献
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Mobile phone networks are increasingly supporting the transmission of textual messages between mobile phones and between mobile phones and other services. This paper describes the current text entry method on mobile phones and describes a new text entry method using a single key-press per letter together with a large dictionary of words for disambiguation. This approach, which is similar to technology recently licensed, independently, to several phone companies, is then extended with automatic word completion. The paper reports the results of initial user tests comparing the text entry methods, analysis of word clashes with the dictionary-based methods and keystroke level modelling of the different input methods. 相似文献
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D. FuentesL. Gonzalez-Abril C. AnguloJ.A. Ortega 《Expert systems with applications》2012,39(3):2461-2465
This paper introduces a new method to implement a motion recognition process using a mobile phone fitted with an accelerometer. The data collected from the accelerometer are interpreted by means of a statistical study and machine learning algorithms in order to obtain a classification function. Then, that function is implemented in a mobile phone and online experiments are carried out. Experimental results show that this approach can be used to effectively recognize different human activities with a high-level accuracy. 相似文献
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Stabilization and extraction of 2D barcodes for camera phones 总被引:1,自引:0,他引:1
With the ubiquity of cellular phones, mobile applications with 2D barcodes have drawn a lot of attentions in recent years.
When a user takes a barcode image with the camera in a mobile device, the captured image tends to be blurred due to camera
shaking when the user presses the shutter. In addition, the captured image includes part of the complex background of the
page with the barcode. In this paper, we point out that the above two issues, which have not been identified in previous works,
deteriorate the accuracy of barcode recognition in the mobile computing. We then propose an efficient and effective algorithm
to restore and extract 2D barcode from a complex background in a camera-shaken image. Compared with previous approaches, our
algorithm outperforms in not only smaller running time but also higher accuracy of the barcode recognition in the mobile computing. 相似文献
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手机3D动画自动生成系统实现了在计算机辅助的条件下短信动画的全自动生成.本文为手机3D动画自动生成系统设计并实现一个学习系统,该学习系统利用随机森林算法生成一个以用户评价为分类结果的学习模型去指导手机3D动画自动生成系统生成更让用户满意的动画,同时学习系统能够随着手机3D动画自动生成系统的运转不断更新学习模型,最终实现“不断学习”的学习能力. 相似文献
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《Interacting with computers》2009,21(3):173-185
Paper and traditional books have been serving as useful tools in supporting knowledge-intensive tasks and school learning. Although learning strategies such as selective verbatim note-taking or question-asking may foster intentional recall or resolve comprehension difficulties in paper-based learning practice, improvement in learning may depend on the opportunity and quality of which students apply note-taking, review notes, or enhance comprehension through questioning. This study aims to complement a paper textbook with a mobile phone and to treat the combination as a whole to facilitate verbatim note-taking, resolving comprehension questions, and receiving reading recommendations. The textbook paragraphs were augmented with line numbers to facilitate coordination between the mobile phone and the paper textbook. An eight-week comparative study was conducted to explore the use of two reading vehicles. The results and findings show that using a mobile phone to augment paper-based learning is technically feasible and seems to promote the application of verbatim note-taking and posting comprehension questions for discussion. However, the results of two course tests indicate that consequent learning improvement seemed inconsistent among the students. A six-week case study was also conducted to explore the implications of the augmented support to students’ learning practice. The findings show that mobile phones as learning supportive tools to augment paper-based learning could support students’ planning and management of learning strategies or activities. The portability of mobile phones and paper textbooks and the ubiquitous connection of paper-based learning with an online learning community may provide the flexibility in planning ahead for suitable learning strategies or activities and may enhance students’ assessment for management of students’ learning goals. 相似文献
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Kenton O’Hara Tim Kindberg Maxine Glancy Luciana Baptista Byju Sukumaran Gil Kahana Julie Rowbotham 《Computer Supported Cooperative Work (CSCW)》2007,16(1-2):11-44
The augmentation of visitor experiences with location-based technologies has been available for some time. Through in-depth
studies of users during these experiences the field is building a rich picture of user behaviour in relation to certain location-based
technologies. However, little work has explored the use of mobile camera phones and 2D barcodes on situated signs and their
properties as a way of delivering such augmented visitor experiences. In this paper we present a study of people engaged in
such a location-based experience at London zoo in which they use mobile camera phones to read 2D barcodes on signs at the
animal enclosures in order to access related content. Through the fieldwork we highlight the social and collaborative aspects
of the experience and how particular characteristics of the mobile phone and barcode technology shape these behaviours. The
paper also highlights some of the non-instrumental aspects of the location-based experience, in particular in relation to
the importance of collecting location-based content. We explore the social aspects of collecting as well as certain competitive elements it introduces
into people’s behaviour. This creates an interesting tension in that aspects of the application encourage cooperation and
sharing among the visitors whereas others encourage competition. In the course of presenting the fieldwork, we explore this
tension further. 相似文献