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Статті в журналах з теми "Video- based tests"
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Pardo-Ballester, Cristina. "El uso del vídeo en tests de comprensión oral por internet." Journal of New Approaches in Educational Research 5, no. 2 (July 15, 2016): 91–98. http://dx.doi.org/10.7821/naer.2016.7.170.
Повний текст джерелаАнотація:
<p class="AbstractText">With sophisticated multimedia technology, there is a renewed interest in the relationship between visual and auditory channels in assessing listening comprehension (LC). Research on the use of visuals in assessing listening has emerged with inconclusive results. Some learners perform better on tests which include visual input (Wagner, 2007) while others have found no difference in the performance of participants on the two test formats (Batty, 2015). These mixed results make it necessary to examine the role of using audio and video in LC as measured by L2 listening tests. The current study examined the effects of two different types of listening support on L2 learners’ comprehension: (a) visual aid in a video with input modified with redundancy and (b) no visuals (audio-only input) with input modified with redundancy. The participants of this study included 246 Spanish students enrolled in two different intermediate Spanish courses at a large Midwestern university who participated in four listening tasks either with video or with audio. Findings of whether the video serves as a listening support device and whether the course formats differ on intermediate-level Spanish learners’ comprehension will be shared as well as participants’ preferences with respect to listening support.</p>
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Liu, Bo, Jiandong Liu, Shuhong Wang, Ming Zhong, Bo Li, and Yujie Liu. "HEVC Video Encryption Algorithm Based on Integer Dynamic Coupling Tent Mapping." Journal of Advanced Computational Intelligence and Intelligent Informatics 24, no. 3 (May 20, 2020): 335–45. http://dx.doi.org/10.20965/jaciii.2020.p0335.
Повний текст джерелаАнотація:
A selective encryption algorithm is proposed to improve the efficiency of high efficiency video coding (HEVC) video encryption and ensure the security of HEVC videos. The algorithm adopts the integer dynamic coupling tent mapping optimization model as the pseudo-random sequence generator, and multi-core parallelization is used as the sequence generation mechanism. The binstrings during the process of context adaptive binary arithmetic coding are selected for encryption, which conforms to the features of invariable binstream and compatible format in terms of video encryption. Performance tests for six types of standard videos with different resolutions were performed. The results indicated that the encryption algorithm has a large key space and benefits from a high encryption effect.
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Wali, Ibtissem, Amina Kessentini, Mohamed Ali Ben Ayed, and Nouri Masmoudi. "DSP TMS320C6678 Based SHVC Encoder Implementation and its Optimization." International Journal of Recent Technology and Engineering (IJRTE) 10, no. 5 (January 30, 2022): 24–31. http://dx.doi.org/10.35940/ijrte.e6656.0110522.
Повний текст джерелаАнотація:
The programmable processors newest technologies, as for example the multicore Digital Signal Processors (DSP), offer a promising solution for overcoming the complexity of the real time video encoding application. In this paper, the SHVC video encoder was effectively implemented just on a single core among the eight cores of TMS320C6678 DSP for a Common Intermediate Format (CIF)input video sequence resolution(352x288). Performance optimization of the SHVC encoder had reached up 41% compared to its reference software enabling a real-time implementation of the SHVC encoder for CIF input videos sequence resolution. The proposed SHVC implementation was carried out on different quantization parameters (QP). Several experimental tests had proved our performance achievement for real-time encoding on TMS320C6678.
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Lesnov, Roman Olegovich. "Content-Rich Versus Content-Deficient Video-Based Visuals in L2 Academic Listening Tests." International Journal of Computer-Assisted Language Learning and Teaching 8, no. 1 (January 2018): 15–30. http://dx.doi.org/10.4018/ijcallt.2018010102.
Повний текст джерелаАнотація:
This article compares second language test-takers' performance on an academic listening test in an audio-only mode versus an audio-video mode. A new method of classifying video-based visuals was developed and piloted, which used L2 expert opinions to place the video on a continuum from being content-deficient (not helpful for answering comprehension items) to content-rich (very helpful for answering comprehension items). The video for one testlet contained only the speaker's non-verbal cues and was found to be content-deficient. The other video contained non-verbal cues overlapping with PowerPoint text and was deemed content-rich. Seventy-three ESL learners participated in the study. The video type classification method was shown to be reliable and practical. The results of the Rasch analysis showed no significant impact of condition, either the content-deficient or the content-rich, either at the testlet level or at the item level. Possible reasons and implications of these findings are discussed.
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Munro Cullum, C., L. S. Hynan, M. Grosch, M. Parikh, and M. F. Weiner. "Teleneuropsychology: Evidence for Video Teleconference-Based Neuropsychological Assessment." Journal of the International Neuropsychological Society 20, no. 10 (October 24, 2014): 1028–33. http://dx.doi.org/10.1017/s1355617714000873.
Повний текст джерелаАнотація:
AbstractThe use of videoconference technology to deliver health care diagnostics and treatment continues to grow at a rapid pace. Telepsychiatry and telepsychology applications are well-accepted by patients and providers, and both diagnostic and treatment outcomes have generally been similar to traditional face-to-face interactions. Preliminary applications of videoconference-based neuropsychological assessment (teleneuropsychology) have yielded promising results in the feasibility and reliability of several standard tests, although large-scale studies are lacking. This investigation was conducted to determine the reliability of video teleconference (VTC) - based neuropsychological assessment using a brief battery of standard neuropsychological tests commonly used in the evaluation of known or suspected dementia. Tests included the Mini-Mental State Examination (MMSE), Hopkins Verbal Learning Test-Revised, Digit Span forward and backward, short form Boston Naming Test, Letter and Category Fluency, and Clock Drawing. Tests were administered via VTC and in-person to subjects, counterbalanced using alternate test forms and standard instructions. Two hundred two adult subjects were tested in both rural and urban settings, including 83 with cognitive impairment and 119 healthy controls. We found highly similar results across VTC and in-person conditions, with significant intraclass correlations (mean=.74; range: 0.55–0.91) between test scores. Findings remained consistent in subjects with or without cognitive impairment and in persons with MMSE scores as low as 15. VTC-based neuropsychological testing is a valid and reliable alternative to traditional face-to-face assessment using selected measures. More VTC-based studies using additional tests in different populations are needed to fully explore the utility of this new testing medium. (JINS, 2014, 20, 1–6)
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Sellberg, Charlott. "Pedagogical dilemmas in dynamic assessment situations: perspectives on video data from simulator-based competence tests." WMU Journal of Maritime Affairs 19, no. 4 (June 30, 2020): 493–508. http://dx.doi.org/10.1007/s13437-020-00210-2.
Повний текст джерелаАнотація:
AbstractThis study investigates navigation instructors’ explanations of dynamic assessment practices during simulator-based competency tests, adopting a video-stimulated recall method. Episodes of authentic video materials from simulator-based competency tests are selected and subjected to interaction analysis. In the next step, the episodes are used for conducting stimulated recall interviews with navigation instructors (n = 11) in two focus groups. The results reveal the dynamic nature of assessing competence as well as how instructors participating in focus groups identified and critically discussed a variety of pedagogical dilemmas related to these dynamics. These are related to aspects that relate to what constitutes a valid exam question, how to assess students’ responses, and consistency and fairness of competence tests. In particular, the results indicate the complexity of conducting valid and reliable assessments of knowledge-in-action in situ as well as how thoughtful scenario designs could reduce inconsistencies and unequal treatment of students. The results also highlight how a repeated and collaborative viewing of videos was helpful for instructors to identify potential problems in the dynamic assessment situations they viewed. The implications of the results highlight the need for conducting high-stake assessments for maritime certificates based only on observable behavior and video records of competence tests rather than during ongoing simulator tests. Lastly, the need for continuous and structured pedagogical development of instructors is identified in order to support their complex work of training and assessing competence.
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Kalakoti, Gowrisankar, and Prabakaran G. "Key-Frame Detection and Video Retrieval Based on DC Coefficient-Based Cosine Orthogonality and Multivariate Statistical Tests." Traitement du Signal 37, no. 5 (November 25, 2020): 773–84. http://dx.doi.org/10.18280/ts.370509.
Повний текст джерелаАнотація:
This paper presents a method, which is developed based on the Discrete Cosine (DC) coefficient and multivariate parametric statistical tests, such as tests for equality of mean vectors and the covariance matrices. Background scenes and forefront objects are separated from the key-frame, and the salient features, such as colour and Gabor texture, are extracted from the background and forefront components. The extracted features are formulated as a feature vector. The feature vector is compared to that of the feature vector database, based on the statistical tests. First, the feature vectors are compared with respect to covariance. If the feature vector of the key-frame and the feature vector of the feature vector database pass the test, then the test for equality of mean vector is performed; otherwise, the testing process is stopped. If the feature vectors pass both tests, then it is inferred that the query key-frame represents the target video in the video database. Otherwise, it is concluded that the query key-frame not representing the video; and the proposed system takes the next feature vector for matching. The proposed method results in an average retrieval rate of 97.232%, 96.540%, and 96.641% for CC_WEB, UCF101, and our newly constructed database, respectively. Further, the mAP scores computed for each video datasets, which resulted in 0.807, 0.812, and 0.814 for CC_WEB, UCF101, and our newly constructed database, respectively. The output results obtained by the proposed method are comparable to the existing methods.
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Murphy, Louise, Stephen Moore, Joan Swan, Davida Hehir, and John Ryan. "Examining the impact of video-based outpatient education on patient demand for a rheumatology CNS service." British Journal of Nursing 30, no. 18 (October 14, 2021): 1056–64. http://dx.doi.org/10.12968/bjon.2021.30.18.1056.
Повний текст джерелаАнотація:
Background: Patient demand for education and access to the clinical nurse specialists (CNSs) during the rheumatology clinic at one hospital in Ireland was increasing. Alternative methods of providing patient education had to be examined. Aims: To explore the efficacy of video-based outpatient education, and its impact on demand for the CNSs. Methods: A video was produced to play in a rheumatology outpatient department. A representative sample of 240 patients (120 non-exposed and 120 exposed to the video) attending the clinic was selected to complete a questionnaire exploring the effect of the video. Data were analysed using chi-square tests with Yates' continuity correction. Findings: Demand for the CNSs was six times higher in the non-exposed group compared with the exposed group (non-exposed: 25%, exposed: 4.8%) (χ2=15.7, P=0.00007), representing a significant decrease in resource demand. Conclusion: High-quality educational videos on view in the rheumatology outpatient department provide patients with information sufficient to meet their educational needs, thus releasing CNS resources.
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Murphy, Louise, Stephen Moore, Joan Swan, Davida Hehir, and John Ryan. "Examining the impact of video-based outpatient education on patient demand for a rheumatology CNS service." British Journal of Nursing 30, no. 18 (October 14, 2021): 1056–64. http://dx.doi.org/10.12968/bjon.2021.30.18.1056.
Повний текст джерелаАнотація:
Background: Patient demand for education and access to the clinical nurse specialists (CNSs) during the rheumatology clinic at one hospital in Ireland was increasing. Alternative methods of providing patient education had to be examined. Aims: To explore the efficacy of video-based outpatient education, and its impact on demand for the CNSs. Methods: A video was produced to play in a rheumatology outpatient department. A representative sample of 240 patients (120 non-exposed and 120 exposed to the video) attending the clinic was selected to complete a questionnaire exploring the effect of the video. Data were analysed using chi-square tests with Yates' continuity correction. Findings: Demand for the CNSs was six times higher in the non-exposed group compared with the exposed group (non-exposed: 25%, exposed: 4.8%) (χ2=15.7, P=0.00007), representing a significant decrease in resource demand. Conclusion: High-quality educational videos on view in the rheumatology outpatient department provide patients with information sufficient to meet their educational needs, thus releasing CNS resources.
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Si, Zhan Jun, Fei Yuan, and Yong Guang Zhao. "Design of Android-Based YUV Video Player." Applied Mechanics and Materials 731 (January 2015): 248–52. http://dx.doi.org/10.4028/www.scientific.net/amm.731.248.
Повний текст джерелаАнотація:
This article elaborates the color space and sampling format of the YUV. By calling SDL, a YUV video player is designed based on Android. The research uses two video testing sequences provided by VQEG. The player is debugged on a Sony Tablet which has the Android OS. Having done some tests, the result shows that the sequences run smoothly via this app. At the end of the article, some future implication of the YUV player has been discussed and the study also serves as a basis for the development of android-based video quality assessment platform.
Дисертації з теми "Video- based tests"
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Medina, Debra R. "Video-based selection test items : an examination of the factorial invariance." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/29858.
Повний текст джерела
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Swander, Carl Joseph. "Video-Based Situational Judgment Test Characteristics: Multidimensionality at the Item Level and Impact of Situational Variables." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27720.
Повний текст джерелаАнотація:
A new approach was taken to identify a specific construct or dimension being measured by a video-based situational judgment test (VBSJT). Appropriate exertion of control was specifically explored in relation to a VBSJT test designed for entry-level selection of law enforcement officers. Ratings from ten law enforcement experts were utilized to identify this construct. The VBSJT items scored toward overexertion of control were significantly related to performance (r = .23) in a sample of 334 incumbent police officers, capturing a large portion of the effective variance of the test which had an overall validity of r = .34.
Situational variables within the items were then compared to ratings of exertion of control within a sample of 5426 applicants. General provocation toward overexertion of control and ethnicity significantly affected appropriate exertion of control. Gender and likeability also had significant impact on appropriate exertion, but the practical significance was limited. Specific character manipulations (i.e., rudeness, aggressiveness, pleasantness, cooperativeness, sympathy, and suspiciousness) also had a significant impact on appropriate exertion of control. Specific information manipulations (i.e., warrants, complaints, contemptible crimes and laws being broken) also had an impact on appropriate exertion of control. Some unexpected findings suggest that the character manipulations may actually override the effect of other provocation.
The overexertion of control scale was also applied to test hypotheses about the likely behavior of police officers. It was found that the location of the organization had an affect on overexertion of control. Contrary to the hypothesis, suburban locations had more overexertion of control than urban locations. Length of tenure for police officers did not have an effect on overexertion of control. This difference did not affect validity across organizations. Implications and further research are discussed.Ph. D.
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Elmankush, Iman. "Investigating the impact of including videos or still images in computer-based academic listening comprehension tests." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18811/.
Повний текст джерелаАнотація:
Visual materials are central to second language listening (L2), yet their use in L2 listening assessment is very limited. Disagreement about the listening abilities that should be included in L2 listening construct and absence of empirical evidence about the effects of visual materials on performance in L2 listening tests led to disagreement about their use in L2 listening tests. Moreover, previous research did not explore how test takers interact with visual materials other than video texts. The present research attempts to contribute to the existing literature by exploring test takers’ viewing patterns using eye-tracking technology with both video and still photo texts during L2 academic listening test. In addition, cued retrospective reports are employed to extract test takers’ perceptions about the two types of visual materials and shedding light on the underlying cognitive processes they employed. Mixed-research method based on triangulation design was used to investigate test takers’ (n = 30) performance in video, still photo, and audio texts, in addition to recording their viewing patterns, and their reported perceptions about the visual materials. The results revealed that test takers’ performance in the video texts was superior to both still photos and audio texts, with statistically significant difference to audio texts. Cued retrospective report data showed higher helpful perceptions by test takers related to video texts with strong correlation to their scores, while still photo texts were perceived with higher distractedness. Eye tracking data partially coincided with the rest of the results, with two out of three measures- Fixation counts and Total dwell time- found to be higher with video texts. Implications of the study are that visual materials, especially video texts, should be considered in L2 listening tests as they present better representations to the target language use domain, which requires reconsidering the current L2 listening construct.
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Cucick, Cibele Dias. "Desenvolvimento de video educativo para a aprendizagem do autocateterismo vesical intermitente." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/22/22132/tde-06052016-165200/.
Повний текст джерелаАнотація:
A bexiga neurogênica é uma disfunção vesical decorrente principalmente da lesão medular. O cateterismo vesical intermitente é o tratamento mais indicado na atualidade, deve ser realizado de 4 a 6 vezes ao dia, durante toda a vida, visando a proteção do trato urinário superior e a aquisição da continência urinária. Na reabilitação desses indivíduos, a autocateterização vesical é um desafio enfrentado na busca pela autonomia, privacidade, inserção social e participação. Os vídeos educativos são utilizados para o aprendizado do autocateterismo em vários países, por serem de fácil utilização e acesso via internet. Apesar disso, não existem vídeos realizados para o contexto brasileiro, levando em consideração os cateteres urinários e a técnica utilizada no Brasil. Este estudo teve como objetivo desenvolver e validar um vídeo educativo para a realização do autocateterismo vesical intermitente limpo. Trata-se de um estudo quantitativo, desenvolvido em duas fases: 1ª fase com a avaliação de vídeos educativos públicos direcionados para a aprendizagem do autocateterismo vesical intermitente com a técnica limpa; e 2ª Fase, com o desenvolvimento e validação de um vídeo educativo voltado para aprendizagem do autocateterismo. O levantamento dos vídeos utilizou um site de compartilhamento de vídeos utilizando o descritor \"autocateterismo\". Os vídeos foram avaliados por três juízes da área de saúde. O processo de desenvolvimento e validação do roteiro do vídeo educativo utilizou questionários previamente ratificados. Participaram dessas etapas, respectivamente, 18 e 17 juízes experts em reabilitação e/ou no ensino em saúde. O levantamento mostrou que apenas 3,5% (172) do total de vídeos disponíveis no site pesquisado eram voltados para o aprendizado do autocateterismo no contexto brasileiro. Seis vídeos eram específicos para o autocateterismo, dos quais quatro tinham informações desatualizadas ou incorretas, apenas dois atingiram a pontuação aceitável. Na validação do roteiro observou-se um predomínio de participantes do sexo feminino (94,44%), com idade de 30 a 60 anos, dos quais 72,22% possuíam mestrado e 50% atuavam há mais de cinco anos na área de reabilitação. O roteiro foi considerado validado com 96,29% das respostas dos juízes \"concordo\" ou \"concordo totalmente\" nas questões referentes ao quesito objetivo, 91,09% para quesito conteúdo, 98,12% em relação ao quesito relevância, 75% quanto ao quesito ambiente, 71,11% no quesito linguagem verbal e 92,70% referente à inclusão de tópicos. A produção do vídeo contou com uso de tecnologia 3D e apoio de uma equipe técnica especializada. No que se refere à validação do conteúdo do vídeo educativo, o conteúdo do vídeo foi considerado validado com 100% dos juízes que responderam \"concordo\" ou \"concordo totalmente\" nas questões referentes à funcionalidade, 86,27% referentes à usabilidade, 97,06% no quesito eficiência, 100% para técnica audiovisual, 94,11% quanto ao ambiente e 97,05% procedimento. O vídeo educativo foi avaliado positivamente tanto pela qualidade das informações quanto pela didática do ensino, mostrando a relevância da validação de materiais educativos. A expectativa é disseminar o vídeo educativo em diferentes centros de reabilitação e Universidades, visando propagar e tornar o conhecimento sobre a temática mais acessível à sociedade e aos profissionais de saúde, em especial os de reabilitação. Além de incentivar e embasar metodologicamente o desenvolvimento de outros vídeos educativos na área da saúdeThe neurogenic bladder is a vesical dysfunction mainly due to spinal cord injury. Clean intermittent catheterization is currently the best treatment and it should be performed 4-6 times a day, during the entire lifetime, in order to protect the upper urinary tract and the acquisition of urinary continence. The rehabilitation of the affected people, by the use of self-catheterization is a challenge, which has to be faced to maintain autonomy, privacy, social inclusion and participation. Educational videos on self-catheterization are used in several countries because of its handling and wide accessibility via Internet. However, there are no videos concerning Brazilian context, considering the urinary catheters and catheterization techniques used in Brazil. This study aimed to develop and validate an educational video on how to perform intermittent self- catheterization in Brazilian context. It is a quantitative study, divided in two phases: The 1st phase including the evaluation of existing public educational videos with the aim to learn the intermittent self-catheterization using a clean technique and the 2nd phase with the development and validation of an educational video with the objective to learn the self-catheterization. Educational videos have been gathered searching the keyword \"self- catheterization\" on a video- sharing Website. Three judges of the healthcare area evaluated the videos. The development and validation process of the storyboard of the educational video used previously evaluated questionnaires. In these phases, respectively, 18 and 17 judges, who are experts in rehabilitation and/or health education took part. The first evaluation showed that only 3.5% of all videos available (172) on the website had learning self-catheterization as content in Brazilian context. Six videos were specific about self-catheterization, of which four had outdated or incorrect information and only two achieved an acceptable score. In the evaluation of the storyboard participated mainly female specialists (94.44%), aged between 30 and 60 years, of which 72.22% had a master\'s degree and 50% worked for more than five years in the area of rehabilitation. The judges rated the storyboard with 96.29% of the responses being \"agree\" or \"fully agree\" regarding the purpose of the video, 91.09% regarding the content, 98.12% in relation to the relevance, 75% regarding the ambience, 71 11% regarding the verbal language and 92.70% in relation to the query inclusion of topics. The production of the video used 3D technology and was supported by a specialized technical team. With regard to the validation of educational video, the video content was considered validated with 100% of the judges responded \"agree\" or \"fully agree\" on issues related to functionality, 86.27% for usability, 97.06% in the query efficiency, 100% on the visual technique, 94.11% to the environment query and 97.05% for the procedure. Regarding the educational video validation, it was considered validated with 100% of respondents \"agree\" or \"strongly agree\" on issues related to functionality, 86.27% respondents to the query usability, 97.06% related to efficiency, 100% in the visual technique, 94.11% to the environment and 97.05% for the procedure. Both, the quality of information and the teaching didactic of the educational video was evaluated positively, showing the importance of validation of educational materials. The ambition is to spread the educational video in different rehabilitation centers and universities, in order to share the knowledge and make it accessible to the society and the health professionals, especially those working the area of rehabilitation. In addition, the goal is to encourage and consolidate the methodological development of other educational videos in the healthcare area
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Santos, Pedro. "Patch based 3D reconstruction of the liver surface from laparoscopic videos." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11773.
Повний текст джерелаАнотація:
Mestrado em Engenharia MecânicaEndoscope is commonly used in Laparoscopic surgery. It allows to the doctor to perform the surgery without opening a cavity. Therefore, it allows the surgeon to perform smaller incisions and consequently diminish the risk of infection. An investigation regarding the reconstruction of the liver surface from a sequence of images obtained from an endoscope video has been done by the Vision Institute of TUHH, in cooperation with the Medical Center Hamburg-Eppendorf. The goal of this paper is to optimize that reconstruction. Previous works in the institute allowed, using matlab functions, to obtain a first reconstruction. Having the matrices of the transformations between cameras and the reconstructed points in 3D, the goal is to optimize that using a patch based 3D reconstruction. The method consists of the construction of a patch for every point and trying to find a good normal for the patch. Some tools are used for the optimization like normal cross correlation that is the similarity function used for obtaining the match of the corresponded 2D windows in different cameras, and a nonlinear optimization method to look for the best normal who gives the best match between the windows. The main objective is to evaluate this method and draw conclusions about its utility and viability: can this method be used for the optimization in the case of the endoscope video of a liver surface.
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Gonçalves, Vagner Mendonça. "Recuperação de vídeos médicos baseada em conteúdo utilizando extratores de características visuais e sonoras." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/100/100131/tde-20122016-111013/.
Повний текст джерелаАнотація:
A evolução dos dispositivos de armazenamento e das redes de computadores permitiram que os vídeos digitais assumissem um importante papel no desenvolvimento de sistemas de informação multimídia. Com a finalidade de aproveitar todo o potencial dos vídeos digitais no desenvolvimento desses sistemas, técnicas automatizadas eficientes para análise, interpretação e recuperação são necessárias. A recuperação de vídeos baseada em conteúdo (CBVR, do inglês content-based video retrieval) permite o processamento e a análise do conteúdo de vídeos digitais visando à extração de informações relevantes que viabilizem indexação e recuperação. Trabalhos científicos têm proposto a aplicação de CBVR em bases de vídeos médicos a fim de proporcionar diferentes contribuições como diagnóstico auxiliado por computador, suporte à tomada de decisão e disponibilização de bases de vídeos para utilização em treinamento e educação médica. Em geral, características visuais são as principais informações utilizadas no contexto de CBVR aplicada em vídeos médicos. No entanto, muitos diagnósticos são realizados por meio da análise dos sons produzidos em diferentes estruturas e órgãos do corpo humano. Um exemplo é o diagnóstico cardíaco que, além de exames de imagem como ecocardiografia e ressonância magnética, também pode empregar a análise dos sons provenientes do coração por meio da auscultação. O objetivo deste trabalho consistiu em aplicar e avaliar extratores de características de som em conjunto com extratores de características visuais para viabilizar CBVR e, então, inferir se a abordagem resultou em ganhos com relação ao desempenho de recuperação quando comparada à utilização apenas das características visuais. Vídeos médicos constituíram nosso principal interesse, porém o trabalho considerou também vídeos não relacionados à área médica para a validação da abordagem. Justifica-se o objetivo, pois a análise do som, visando a obter descritores relevantes para melhorar os resultados de recuperação, ainda é pouco explorada na literatura científica. Essa afirmação foi evidenciada com a condução de uma revisão sistemática sobre o tema. Dois conjuntos de experimentos foram conduzidos visando a validar a abordagem de CBVR mencionada. O primeiro conjunto de experimentos foi aplicado sobre uma base de vídeos sintetizados para validação da abordagem. Já o segundo, foi aplicado em uma base de vídeos construídos utilizando-se imagens provenientes de exames de ressonância magnética em conjunto com sons provenientes de auscultação do coração. Os resultados foram analisados utilizando-se as métricas de revocação e precisão, bem como o gráfico que as relaciona. Demonstrou-se que a abordagem é promissora por meio da melhora significativa dos resultados de recuperação nos diferentes cenários de combinação entre características visuais e sonoras experimentadosAdvance of storage devices and computer networks has contributed to digital videos assume an important role in the development of multimedia information systems. In order to take advantage of the full potential of digital videos in the development of these systems, it is necessary the development of efficient techniques for automated data analysis, interpretation and retrieval. Content-based video retrieval (CBVR) allows processing and analysis of content in digital videos to extract relevant information and enable indexing and retrieval. Scientific studies have proposed the application of CBVR in medical video databases in order to provide different contributions like computer-aided diagnosis, decision-making support or availability of video databases for use in medical training and education. In general, visual characteristics are the main information used in the context of CBVR applied in medical videos. However, many diagnoses are performed by analysing the sounds produced in different structures and organs of the human body. An example is the cardiac diagnosis which, in addition to images generated by echocardiography and magnetic resonance imaging, for example, may also employ the analysis of sounds from the heart by means of auscultation. The objective of this work was evaluating combination between audio signal and visual features to enable CBVR and investigating how much this approach can improve retrieval results comparing to using only visual features. Medical videos are the main data of interest in this work, but video segments not related to the medical field were also used to validate the approach. The objectives of this work are justifiable because audio signal analysis, in order to get relevant descriptors to improve retrieval results, is still little explored in the scientific literature. This statement was evidenced by results of a systematic review. Two experiment sets were conducted to validate the CBVR approach described. The first experiment set was applied to a synthetic images database specially built to validate the approach, while the second experiment was applied to a database composed of digital videos created from magnetic resonance imaging and heart sounds from auscultation. Results were analyzed using the recall and precision metrics, as well as the graph which relates these metrics. Results showed that this approach is promising due the significantly improvement obtained in retrieval results to different scenarios of combination between visual and audio signal features
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Lobo, Tamile Rocha da Silva. "Comparação entre cimentos resinosos e uma resina \"bulk fill\" na cimentação de pinos de fibra de vidro - Análise de resistência adesiva e dureza." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/23/23134/tde-12062018-092206/.
Повний текст джерелаАнотація:
Este estudo comparou a performance de quarto agentes cimentantes com diferentes estratégias adesivas para cimentação de pinos de fibra de vidro em canais radiculares, através do teste de resistência adesiva e avaliando a dureza em diferentes profundidades. Para isto, foram utilizadas 60 raízes bovinas tratadas endodonticamente. Foram cimentados pinos de fibra de vidro Rebilda Post 20 de acordo com os seguintes protocolos divididos nos seguintes grupos: Grupos QM: Adesivo autocondicionante dual Futurabond DC + cimento resinoso dual Bifix QM; Group SE: Cimento resinoso autocondicionante de polimerização dual Bifix SE; Group RB: Adesivo autocondicionante de polimerização dual Futurabond DC + Resina Rebilda; Group XB: aplicação do adesivo autocondicionante de polimerização dual Futurabond DC + resina composta do tipo \"bulk fill\" X-tra Base. As raízes foram cortadas em fatias de 1mm e separadas em terços, sendo obtidos 2 corpos de prova por terço. Foram avaliadas a resistência adesiva (n=10) e a microdureza (n=5), após uma semana e após 4 meses de armazenamento em água. Para o teste de resistência adesiva (push- out) uma fatia de cada terço foi testada depois de uma semana e as outras 3 fatias provenientes do mesmo dente avaliadas após 4 meses. O ensaio de push out foi realizado a uma velocidade de 0,5mm/min até o deslocamento do pino e/ou fratura da interface adesiva. Para o teste de microdureza 20 dentes foram selecionados aleatoriamente e de cada dente foram obtidas seis 6 fatias que foram armazenadas em água destilada por uma semana até a mensuração em microdurômetro, após uma semana e após 4 meses. Os corpos de prova foram submetidos ao teste de microdureza Knoop em microdurômetro HMV-2000 (Shimadzu, Tokyo, Japan), cinco endentações foram realizadas na camada de cimento de cada fatia. Os dados referentes aos testes de resistência adesiva (push- out) e microdureza foram submetidas análise de variância 3 fatores (ANOVA), teste de tukey (p<0,05) e teste de correlação de Person. Os valores de resistência adesiva não apresentaram diferenças estatísticas significantes quando observado os valores de resistência adesiva entre os grupos QM, RB e XB (p>=0.05), porém menores valores de resistência adesiva foram observados no Grupo SE. Quando considerada a variável envelhecimento não foram encontradas diferenças na resistência adesiva medida em uma semana e 4 meses (p>=0.05). Para a microdureza diferenças estatisticamente significantes foram encontradas nos diferentes terços da raiz (p<0.05). Os agentes cimentantes apresentaram diferenças estatísticas significantes na dureza (p<0.05). O grupo XB apresentou os maiores valores seguido por QM, RB e SE. Os grupos SE, RB e XB não apresentaram 80% da dureza máxima nas fatias correspondentes a região apical do canal radicular. O teste de Person mostrou haver correlação positiva linear entre a resistência adesiva e a dureza medidas antes e após o envelhecimento. O uso cimento resinoso dual, associado a uma aplicação anterior do sistema adesivo, ainda é a escolha mais segura, pois apresentou valores de força de adesão elevados, associados a valores de dureza adequados, mesmo em regiões apicais do canal radicular.This study compared the performance of four cementitious agents with different adhesive strategies for cementing fiberglass pins in root canals, through the adhesive strength test and evaluating the hardness at different depths. For this, 60 endodontically treated bovine roots were used. Rebilda Post 20 fiberglass pins were cemented according to the following protocols divided into the following groups: QM groups: dual self-etching adhesive Futurabond DC + resin cement Bifix QM; Group SE: Dual polymerization resin cement Bifix SE; Group RB: application of self-etching dual-polymerization adhesive Futurabond DC + resin Rebilda; Group XB: application of the self-etching adhesive for dual polymerization Futurabond DC + composite resin of the bulk fill type X-tra Base. The roots were cut into 1mm slices and separated into thirds, obtaining 2 specimens per third. Bond strength (n =10) and microhardness (n = 5) were evaluated after one week and after 4 months of storage in water. For the push-out test one slice of each third was tested after one week and the other 3 slices from the same tooth evaluated after 4 months. The push out test was performed at a speed of 0.5mm / min until the pin displacement and / or fracture of the adhesive interface. For the microtensile test, 20 teeth were randomly selected and six slices were obtained from each tooth, which were stored in distilled water for one week until microdurometer measurement, after one week and after four months. The specimens were submitted to the Knoop microhardness test in HMV-2000 microdurometer (Shimadzu, Tokyo, Japan), five indentations were performed in the cement layer of each slice. The data for the tests of bond strenght (push-out) and microhardness were submitted to analysis of variance 3 factors (ANOVA) and Tukey test (p <0.05) and Person correlation test. The bond strength values did not present significant statistical differences when the adhesive strength values were observed between the groups QM, RB and XB (p>=0.05), but lower values of adhesive strength were observed in the SE Group. When the aging variable was considered, differences in adhesive strength measured at one week and 4 months (p>=0.05) were not found. For microhardness, statistically significant differences were found in the different thirds of the root (p <0.05). The cementing agents presented significant statistical differences in the hardness (p <0.05). The XB group presented the highest values followed by QM, RB and SE. The groups SE, RB and XB did not present 80% of the maximum hardness in the slices corresponding to the apical region of the root canal. The Person test showed a linear positive correlation between the adhesive strength and the hardness measured before and after aging. The use of dual resin cement, combined with a previous application of the adhesive system, is still the safest choice, since it presented high values of bond strength, associated with adequate hardness values, even in apical regions of the root canal.
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Costa, Bill Jorge. "Novas matrizes vítreas à base de InF3 para aplicações em fibras ópticas especiais para telecomunicações." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-24042015-175523/.
Повний текст джерелаАнотація:
Novas composições vítreas do sistema pseudo-ternário InF3--GaF3--GdF3 com teores constantes de (ZnF2-BaF2-SrF2-NaF) foram estudadas. Os melhores vidros preparados mostraram propriedades físicas e químicas superiores àquelas relatadas para outros vidros à base de fluoretos de metais pesados. Destacam-se a melhor estabilidade térmica contra a devitrificação, expressa por exemplo pelos valores do parâmetro de estabilidade Tx-Tg (> 100°C) e a boa capacidade de transmissão na região do infravermelho do espectro eletromagnético (˜ 7 μm). Demonstrou-se também que os vidros investigados têm uma boa resistência química contra a corrosão em meio aquoso e um comportamento mecânico satisfatório, o que os torna atraentes para aplicações práticas. Um estudo envolvendo a dopagem de algumas composições com os elementos manganês e neodímio, objetivando a melhoria da capacidade de emissão do sistema através do processo de transferência de energia Mn+2 #8594 Nd+3 foi realizado e resultou em vidros com boa qualidade óptica para aplicações potenciais em fibras para amplificação óptica e laseres. Testes preliminares visando a preparação de préformas com estrutura casca-núcleo, efetuados através dos processos build-incasting e rotational casting utilizando alguns vidros selecionados, revelaram que a produção de pré-formas sem a ocorrência de cristalização dos vidros ou trincamento das mesmas é viávelNew vitreous compositions in the pseudo-ternary system InF3--GaF3--GdF3 with constant concentrations of (ZnF2-BaF2-SrF2-NaF) were studied. The best glasses prepared showed better physical and chemical properties than those reported for other heavy metal fluoride-based glasses. A better thermal stability against devitrification expressed by the values of the stability parameter Tx-Tg (> 100°C) and a good transmitting capacity (˜ 7 μm) in the infrared region of the electromagnetic spectrum are relevant properties. It was also demonstrated that the glasses investigated have a good chemical resistance to corrosion in aqueous medium and a satisfactory mechanical behavior, what make them attractive materials for practical applications. Doping some compositions with manganese and neodymium, aiming better glass emission properties through the energy transfer process Mn+2 ~ Nd+3, resulted in glasses of good optical quality for applications in fibers for optical amplification and lasers. Preliminary tests involving the preparation of preforms using the build-in-casting and rotational casting techniques revealed that the production of preforms without the occurrence of crystallization of the glasses or cracking of the preform is feasible
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Morimitsu, Henrique. "A graph-based approach for online multi-object tracking in structured videos with an application to action recognition." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-13012016-101607/.
Повний текст джерелаАнотація:
In this thesis we propose a novel approach for tracking multiple objects using structural information. The objects are tracked by combining particle filter and frame description with Attributed Relational Graphs (ARGs). We start by learning a structural probabilistic model graph from annotated images. The graphs are then used to evaluate the current tracking state and to correct it, if necessary. By doing so, the proposed method is able to deal with challenging situations such as abrupt motion and tracking loss due to occlusion. The main contribution of this thesis is the exploration of the learned probabilistic structural model. By using it, the structural information of the scene itself is used to guide the object detection process in case of tracking loss. This approach differs from previous works, that use structural information only to evaluate the scene, but do not consider it to generate new tracking hypotheses. The proposed approach is very flexible and it can be applied to any situation in which it is possible to find structural relation patterns between the objects. Object tracking may be used in many practical applications, such as surveillance, activity analysis or autonomous navigation. In this thesis, we explore it to track multiple objects in sports videos, where the rules of the game create some structural patterns between the objects. Besides detecting the objects, the tracking results are also used as an input for recognizing the action each player is performing. This step is performed by classifying a segment of the tracking sequence using Hidden Markov Models (HMMs). The proposed tracking method is tested on several videos of table tennis matches and on the ACASVA dataset, showing that the method is able to continue tracking the objects even after occlusion or when there is a camera cut.Nesta tese, uma nova abordagem para o rastreamento de múltiplos objetos com o uso de informação estrutural é proposta. Os objetos são rastreados usando uma combinação de filtro de partículas com descrição das imagens por meio de Grafos Relacionais com Atributos (ARGs). O processo é iniciado a partir do aprendizado de um modelo de grafo estrutural probabilístico utilizando imagens anotadas. Os grafos são usados para avaliar o estado atual do rastreamento e corrigi-lo, se necessário. Desta forma, o método proposto é capaz de lidar com situações desafiadoras como movimento abrupto e perda de rastreamento devido à oclusão. A principal contribuição desta tese é a exploração do modelo estrutural aprendido. Por meio dele, a própria informação estrutural da cena é usada para guiar o processo de detecção em caso de perda do objeto. Tal abordagem difere de trabalhos anteriores, que utilizam informação estrutural apenas para avaliar o estado da cena, mas não a consideram para gerar novas hipóteses de rastreamento. A abordagem proposta é bastante flexível e pode ser aplicada em qualquer situação em que seja possível encontrar padrões de relações estruturais entre os objetos. O rastreamento de objetos pode ser utilizado para diversas aplicações práticas, tais como vigilância, análise de atividades ou navegação autônoma. Nesta tese, ele é explorado para rastrear diversos objetos em vídeos de esporte, na qual as regras do jogo criam alguns padrões estruturais entre os objetos. Além de detectar os objetos, os resultados de rastreamento também são usados como entrada para reconhecer a ação que cada jogador está realizando. Esta etapa é executada classificando um segmento da sequência de rastreamento por meio de Modelos Ocultos de Markov (HMMs). A abordagem de rastreamento proposta é testada em diversos vídeos de jogos de tênis de mesa e na base de dados ACASVA, demonstrando a capacidade do método de lidar com situações de oclusão ou cortes de câmera.
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Gonçalves, Priscilla Santana Pinto. "Selamento de fossas e fissuras após 6 meses com diferentes materiais: Resinoso X Ionómerico." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25145/tde-03092013-154047/.
Повний текст джерелаАнотація:
Este estudo avaliou e comparou, após 6 meses, dois materiais usados como selantes de fossas e fissuras, FluroShield® (Dentsply, Germany) e Clinpro™ XT Varnish (3M ESPE, Dental Products, St. Paul, MN, U.S.A.) quanto à retenção e características superficiais. Além disso, comparou-os, com um grupo controle não selado, com relação à incidência de cárie no período. Participaram deste trabalho, 31 crianças de 6 a 8 anos de idade, com no mínimo dois primeiros molares permanentes hígidos e história de cárie, num total de 114 dentes divididos aleatoriamente em três grupos: CLP (Clinpro™ XT Varnish), FS (FluroShield®) e ctr (Controle). O selamento foi realizado sob isolamento relativo para ambos os materiais testados, após profilaxia prévia com jato de bicarbonato de sódio e água e, condicionamento com gel de ácido fosfórico a 35% por 15 segundos. A avaliação clínica foi realizada por dois examinadores calibrados após 6 meses. Avaliou-se a retenção e a incidência de cárie nas cinco áreas oclusais: OM, OC, OD, OV e OL; e as características superficiais e a retenção considerando a superfície oclusal como um todo. Houve diferença estatisticamente significante para a prevalência de cárie (teste de Kruskal Wallis, p=0,000 a 0,007), para todas as áreas, entre os grupos selados (CLP e FS) e o controle. Sendo que quanto à incidência, só foi verificada diferença significante para a área OL (p=0,014). O teste do Qui-quadrado identificou que não houve diferença estatisticamente significante entre os materiais, com relação à taxa de sucesso de retenção da superfície oclusal como um todo, quando se considerou o somatório das cinco áreas (p=0,079) ou quando se verificou a retenção por superfície (p=0,141). No entanto, a análise do conjunto de critérios de retenção na superfície oclusal toda, mostrou uma diferença estatisticamente significante para o FS (teste de Mann-Whitney, p=0,002). Em relação às características superficiais, o FS apresentou superioridade durante o período estudado de forma significativa, indicada pelo teste de Mann-Whitney, para a deterioração marginal (p=0,000), descoloração marginal (p=0,008), e descoloração superficial (p=0,001). Ele também foi superior, mas não significante, quanto à textura superficial. A frequência de bolhas nas superfícies seladas não mostrou diferença significativa (teste do Qui-quadrado, p=0,758) entre os materiais. Desta forma, pode-se concluir que ambos os materiais foram efetivos nos primeiros 6 meses de avaliação, embora, tenha havido melhor desempenho clínico do selante FluroShield®.This study evaluated and compared two dental sealants, for 6 months. The materials, Fluroshield® (Dentsply, Germany) and Clinpro™ XT Varnish (3M ESPE Dental Products, St. Paul, MN, USA) were analyzed with regard their retention and superficial characteristics. They also were compared with a control group, without sealant, regarding the dental caries incidence. The sample was composed by 31 children from 6 to 8 years of age, with at least two sound first permanent molars, but with a dental caries history. A total of 114 teeth were randomly alocated in three groups: CLP (Clinpro™ XT Varnish), FS (Fluroshield®) and ctr (Control). The sealings were applyed under relative isolation after a previous prophylaxis with a water-air-polishing jet, and an enamel etching with a 35% phosphoric acid gel for 15 seconds. Clinical evaluation was performed by two calibrated examiners after 6 months considering: the sealant retention and the incidence of occlusal caries in five areas: OM, OC, OD, OV and OL and finally, the surface characteristics and retention considering the occlusal surface as only one area. It was shown a significant difference (Kruskal-Wallis test, p=0.000 to 0.007) for the caries prevalence in all areas comparing the sealed group (CLP and FS) versus control. Whereas the incidence, it was only verified a significant diference for the OL area (p=0.014). There was no significant difference (Chi-square test, p=0.079) between the materials regarding the success rate of retention for the occlusal surface when it was considered the sum of the five areas, or for the occlusal surface without divisions (p=0.141). Nevertheless there was a significant difference between the sealants (Mann-Whitney test, p=0.002), with better results for the FS group, when it was analysed the influence of all the retention criteria. Regarding the surface characteristics, the FS group showed a significant superiority (Mann-Whitney test) during the period of the study for the impairment marginal (p=0.000), marginal discoloration (p=0.008), and surface discoloration (p=0.001). Although FS had also been superior for the surface texture, this result was not significant. The frequency of bubbles in the sealed surfaces was not significant (Qui-square test, p=0.758) between the materials. Thus, it can be concluded that both materials were effective during this first 6 months of evaluation, although it is evident that the Fluroshield® sealant had shown a better clinical performance.
Книги з теми "Video- based tests"
1
1947-, Trollip Stanley R., ed. Computer-based instruction: Methods and development. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1991.
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2
1947-, Trollip Stanley R., ed. Computer-based instruction: Methods and development. Englewood Cliffs, N.J: Prentice-Hall, 1985.
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3
Bryan, Martha S. USE OF A VIDEO EVALUATION PROGRAM AS A PERFORMANCE-BASED ASSESSMENT TOOL FOR THERAPEUTIC COMMUNICATION SKILLS AT A COMMUNITY COLLEGE. 1996.
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4
Shultz, Sandra J., Peggy A. Houglum, and David H. Perrin. Examination of Musculoskeletal Injuries. 4th ed. Human Kinetics, 2016. http://dx.doi.org/10.5040/9781718215528.
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Examination of Musculoskeletal Injuries, Fourth Edition, guides current and future athletic trainers and rehabilitation professionals through the examination and evaluation of musculoskeletal injuries both on and off the field. The text presents injury examination strategies in on-site, acute, and clinical settings and provides the information on mastering the skills needed for the Board of Certification examination for athletic trainers as determined by the sixth edition of Athletic Training Role Delineation Study/Practice Analysis for entry-level athletic trainers. This updated fourth edition contains foundational information on a wide spectrum of injuries and the appropriate tests for examining and diagnosing them. Readers will learn to obtain an accurate injury history from the patient, inspect the injury and related areas, test motion control, palpate both bone and soft tissues, and examine function in order to gauge the player’s readiness to return to play. The fourth edition also includes the following enhancements: More than 51 short video clips that correspond to and demonstrate evaluation techniques for various musculoskeletal disorders found throughout the text.Full-color photos and medical artwork have been added throughout the text to clarify testing techniques and enhance knowledge of relevant body structures.Substantial updates provide the most recent evidence-based clinical information.An expanded selection of special tests and injury-specific examinations are now presented in a more accessible format and include a photo or video, description of the purpose, patient and clinician positions for the test, procedures performed, and possible outcomes. The content of Examination of Musculoskeletal Injuries, Fourth Edition, has been restructured and focused to provide applicable information in a straightforward manner. Examination of Musculoskeletal Injuries, Fourth Edition, is an essential resource for students of athletic training and therapy as well as current practitioners in the field who wish to use evidence-based procedures in their clinical practice to ensure safe and accurate diagnoses of injuries.
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Metzl, Jordan D., ed. Sports Medicine in the Pediatric Office. 2nd ed. American Academy of Pediatrics, 2017. http://dx.doi.org/10.1542/9781610021234.
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Completely revised and updated, the second edition of this best-selling pediatric sports medicine resource provides step-by-step demonstrations of the examination and evaluation techniques for common sports injuries. The book includes more than 100 images, plus 2+ hours of video covering physical examination keys, when to order radiographs, CT scans, and MRIs; treatment plan development; case-based coverage of common injuries, including ankle and foot, knee and lower leg, shoulder, wrist and elbow, hip and spine, and concussions and preventive strategies. This all encompassing resource allows you to: Walk through case studies that highlight the issues most commonly seen at specific stages of development. View examinations and tests that can help you identify the extent and location of injury. See demonstrations of preventive strengthening exercises. Use proven approaches to diagnosing and managing sports injuries to improve your practice. Learn which test results to obtain and when. New features All chapters fully reviewed and updated New chapter on Trends in Prevention of Sports Injury in the Young Athlete 5 new sport-specific chapters - Soccer - Baseball and softball - Collision sports (football, hockey, lacrosse, and rugby) - Gymnastics - Running Chapters provide: Overview of the sport(s) Overview of the sport history and demographic information in young athletes Cases-based scenarios that highlight the major issues in the sport Suggestions on how pediatric health professionals can ensure the safest sport experience in the sport
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McKeon, Andrew, B. Mark Keegan, and W. Oliver Tobin. Mayo Clinic Cases in Neuroimmunology. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780197583425.001.0001.
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In the past 2 decades, diagnostics and therapeutics in neuroimmunology have rapidly evolved and increased in complexity. Diagnosis is assisted by various laboratory and advanced imaging techniques. Randomized clinical trials in multiple sclerosis and neuromyelitis optica, and smaller studies for rarer autoimmune diseases, have led to distinct immune molecule–targeted and mechanism-specific therapies. The fields of cerebrovascular medicine, neurooncology, and neuroinfectious diseases have not remained static either. All of these gains present a challenge, however, in that early and accurate neurologic diagnosis is more important than ever. In our experience, some diagnostic pitfalls lie in the interpretation of test results and images without reference to the nuances of the clinical history and examination. Although some things change (eg, technology), other things never change (eg, clinical common sense). The 83 case-based chapters focus on key components of the history, examination and test findings, and differential diagnosis, although we also reference treatment approaches extensively throughout. To bring some form to this extensive repertoire of cases, the book is divided into 3 sections covering central nervous system demyelinating disease, autoimmune neurologic disorders, and others. Illustrations include imaging and, where relevant, pathologic images and video material. Board review–style questions are also provided.
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Colmeiro, José. Peripheral Visions / Global Sounds. Liverpool University Press, 2018. http://dx.doi.org/10.5949/liverpool/9781786940308.001.0001.
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Galician audio/visual culture has experienced an unprecedented period of growth following the process of political and cultural devolution in post-Franco Spain. This creative explosion has occurred in a productive dialogue with global currents and with considerable projection beyond the geopolitical boundaries of the nation and the state, but these seismic changes are only beginning to be the subject of attention of cultural and media studies. This book examines contemporary audio/visual production in Galicia as privileged channels through which modern Galician cultural identities have been imagined, constructed and consumed, both at home and abroad. The cultural redefinition of Galicia in the global age is explored through different media texts (popular music, cinema, video) which cross established boundaries and deterritorialise new border zones where tradition and modernity dissolve, generating creative tensions between the urban and the rural, the local and the global, the real and the imagined. The book aims for the deperipheralization and deterritorialization of the Galician cultural map by overcoming long-established hegemonic exclusions, whether based on language, discipline, genre, gender, origins, or territorial demarcation, while aiming to disjoint the center/periphery dichotomy that has relegated Galician culture to the margins. In essence, it is an attempt to resituate Galicia and Galician studies out of the periphery and open them to the world.
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Maasen, Sabine, and Jan-Hendrik Passoth, eds. Soziologie des Digitalen - Digitale Soziologie? Nomos Verlagsgesellschaft mbH & Co. KG, 2020. http://dx.doi.org/10.5771/9783845295008.
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About ten years ago, we were still able to justify the reservations of sociology with regard to digitisation as a healthy caution against the hype of the ‘virtual world’ and ‘cyberspace’; today, the situation looks different: beyond the usual rhetoric of media revolutions, new forms of practice, organisation and order have emerged around digital technologies in more or less all fields, posing tangible challenges to sociological theory-building, methods development and empirical social research. Are our theories based on action, communication or practice suitable for describing the contribution of algorithms? Are our methods for dealing with language, images and printed text suitable for analysing the automatic modification of texts, images and videos by filter technologies? How do we deal with increasing competition in data analysis and evaluation? These are the questions that this special volume of the journal ‘Soziale Welt’ (ISSN 0038-6073) explores. With contributions by Dirk Baecker, Sascha Dickel, Tobias Wolbring, Barbara Sutter, Sabine Maasen, Elke Wagner, Niklas Barth, Katharina Kinder-Kurlanda, Roger Häußling, Udo Thiedeke, Josef Wehner, Nicole Zillien, Bernadette Kneidinger-Müller, Heike Greschke, Jagoda Motowidlo, René König, Patrik Sumpf, Christian Stegbauer, Alexander Mehler, Oliver Nachtwey, Philipp Staab, Andreas Boes, Tobias Kämpf, Alexander Zielger, Sabine Pfeiffer, Anne Suphan, Uli Meyer, Uwe Matzat, Erik van Ingen, Christian Papsdorf, Tanja Carstensen, Jeffrey Wimmer, John Postill, Victor Lasa, Ge Zhang, Evelyn Ruppert
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Super NES Games Secrets, Greatest Tips. Rocklin, CA: Prima Publishing, 1993.
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Fink, Maximilian C., Victoria Reitmeier, Matthias Siebeck, Frank Fischer, and Martin R. Fischer. "Live and Video Simulations of Medical History-Taking: Theoretical Background, Design, Development, and Validation of a Learning Environment." In Learning to Diagnose with Simulations, 109–22. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89147-3_9.
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AbstractHistory-taking is an essential diagnostic situation and has long been an important objective of medical education in European countries and beyond. Thus, the research project presented here investigates facilitating diagnostic competences in live and video history-taking simulations. In this chapter, the theoretical background and the design, development, and validation process of the learning environment for this research project are described. In the first section, an overview of history-taking models is provided, the concept of diagnostic competences for history-taking is specified, and a summary of research on simulation-based learning and assessment of history-taking is given. The second section reports on the creation of knowledge tests and the live and video simulations. In the third section, results from a pilot study and an expert workshop are disclosed and findings from a validation study are provided. These findings indicate that the created simulations and knowledge tests measure separate but related aspects of diagnostic competences reliably and validly and may be used for assessment. In the final section, a summary is provided and future questions for research are presented with a focus on the adaptivity of scaffolds and simulation-based learning from atypical cases.
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Monteleone, Erminio, and Lapo Pierguidi. "Il video a 360° come supporto didattico. Un caso di studio nell’insegnamento di Analisi Sensoriale degli Alimenti." In Studi e saggi, 83–90. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-646-9.11.
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The chapter presents a case study based on the design, development, and testing of an interactive 360° video applied to the teaching of Sensory Analysis of Food at the University of Florence. The case study describes the design of 360° video storyboards and the creation of the video by the use of 360° cameras for reproducing a sensory laboratory environment. Video enrichment with Vivista, an educational software allowing lecturers to embed interaction points (e.g. quizzes, texts, images) within the 360° videos is also described. Different immersive modalities for the use of the videos with students in different contexts are described and discussed. The chapter concludes with a reflection on the opportunities that 360° videos may provide to university students for practice and experience.
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Galati, Gaspare, Fausto Marti, and Fabrizio Rocci. "Generation of Radar Images of Aircraft for Design and Test of Image Processing Algorithms in Radar Applications." In Advanced Video-Based Surveillance Systems, 213–22. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-5085-3_19.
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Hirota, Kiyoharu, Yasuhisa Suganuma, Tomoharu Iwasaki, and Takeshi Kuwano. "How to Teach Remotely the Vegetation Works to Protect Slopes Against Mass Wasting: A Case of Using Video Materials in Bhutan." In Progress in Landslide Research and Technology, Volume 1 Issue 2, 2022, 361–70. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18471-0_26.
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AbstractThis paper describes the outline of the video tutorial prepared for vegetation workers and relevant officers in Bhutan to learn how vegetation works are to be done in remote areas. The Japan International Cooperation Agency (JICA for short) took a project on cutting unstable slopes in Gangthangkha, Wangdue, Bhutan, so that they should be gentler than 45° to improve slope stability with vegetation works. Particularly stabilizing slopes along Prime National Highway No. 1 (PNH-1 for short) was the overriding priority because slope failures along this highway have reportedly occurred in rainy seasons. Before vegetation works were carried out on the studied slope of the project, the authors conducted germination tests to choose seeds and methods suitable for the vegetation works. They chose Paspalum Atratum, Ruzi grass, and GM mixed (Grass Mixture seed formulating of Cock’s foot 70% and Italian Ryegrass 30% of 100 kg) based on their test results. The soil thickness associated with sowing was set at 5 cm. The authors tried the following types of vegetation methods on the studied site. Type A is arranging on the slope stripes of soil mixed with seeds and fertilizer, Type B is spreading out a five cm-thick seeds-mixed soil layer over the slope, and Type C is transplanting germination beds. In conclusion, Type C is the best in terms of its performance because the whole slope is quickly covered with already grown plants. In Type B, it is not until grass covers the entire slope that the slope is finally stabilized. Type A is good for seeds-mixed soil stripes, but it takes time for the grass to spread gradually over the whole slope.
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Romaniszyn, Patrycja, Paula Stępień, Agnieszka Nawrat-Szołtysik, and Jacek Kawa. "Video-Based Automatic Evaluation of the 360 Degree Turn Test." In Advances in Intelligent Systems and Computing, 571–79. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91211-0_50.
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Mitrev, I., and M. Y. Mantarkov. "Non-traditional Religion, Hyper-Religiosity and Psychopathology: The Story of Ivan from Bulgaria." In International Perspectives in Values-Based Mental Health Practice, 237–43. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47852-0_27.
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AbstractWe present the story of a young Bulgarian man, who converted to Orthodox Judaism, a religious denomination highly unusual in his country of birth. He has adhered rigorously to religious rules; he has spent most of his time reading religious texts and watching religious videos on the internet. He has not socialized with anyone other than his parents outside his religion. He refuses to study and work, and his only wish is to go to Israel and study Judaism there living on donations. The diagnostic judgments of a number of psychiatrists and a clinical psychologist ranged from “an absence of mental disorder” to “Paranoid schizophrenia.” Diagnostic differences could be attributed to cultural factors and the influence of value judgments in diagnostic assessments.
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Wang, Guotao, Shujuan Wang, Kang Li, Pengfei Niu, and Shicheng Wang. "Research on Test Conditions of Sealed-Relay Remainders Based on High-Speed Video Technology." In Intelligent Computing for Sustainable Energy and Environment, 505–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37105-9_56.
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Schick, Bernhard, and Steffen Schmidt. "Evaluation of Video-Based Driver Assistance Systems with Sensor Data Fusion by Using Virtual Test Driving." In Lecture Notes in Electrical Engineering, 1363–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33738-3_36.
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Jiang, Liming, Wayne Wu, Chen Qian, and Chen Change Loy. "DeepFakes Detection: the Dataset and Challenge." In Handbook of Digital Face Manipulation and Detection, 303–29. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87664-7_14.
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AbstractRecent years have witnessed exciting progress in automatic face swapping and editing. Many techniques have been proposed, facilitating the rapid development of creative content creation. The emergence and easy accessibility of such techniques, however, also cause potential unprecedented ethical and moral issues. To this end, academia and industry proposed several effective forgery detection methods. Nonetheless, challenges could still exist. (1) Current face manipulation advances can produce high-fidelity fake videos, rendering forgery detection challenging. (2) The generalization capability of most existing detection models is poor, particularly in real-world scenarios where the media sources and distortions are unknown. The primary difficulty in overcoming these challenges is the lack of amenable datasets for real-world face forgery detection. Most existing datasets are either of a small number, of low quality, or overly artificial. Meanwhile, the large distribution gap between training data and actual test videos also leads to weak generalization ability. In this chapter, we present our on-going effort of constructing DeeperForensics-1.0, a large-scale forgery detection dataset, to address the challenges above. We discuss approaches to ensure the quality and diversity of the dataset. Besides, we describe the observations we obtained from organizing DeeperForensics Challenge 2020, a real-world face forgery detection competition based on DeeperForensics-1.0. Specifically, we summarize the winning solutions and provide some discussions on potential research directions.
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Bollinger, Chelsey M., and Juhong Christie Liu. "Reflective Learning With Video-Based Annotations." In Cases on Innovative and Successful Uses of Digital Resources for Online Learning, 223–40. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-9004-1.ch010.
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The use of video-based interactive annotation and analysis with time-attached comments and reflection are on the rise in teaching and learning. Although video technologies are becoming more affordable, video annotation tools require sophisticated integration of database management, metadata mapping and retrievability, user management, data privacy, and storage. These issues have contributed to the limited application of these tools in educational settings. To understand the teaching and learning possibilities of these video annotation tools, the researchers conducted a case study with a purposeful sample of faculty from interdisciplinary backgrounds. The study took an inductive approach through comparison of two video annotation systems, exploratory applications as different user roles, observations, usability tests, and pilots with in-service teachers.
Тези доповідей конференцій з теми "Video- based tests"
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Zhong, Chen, Rijiang Wang, and Hongjun Ding. "Smoke-based video fire detectors sensitivity tests using smouldering cotton fire." In 2016 3rd International Conference on Systems and Informatics (ICSAI). IEEE, 2016. http://dx.doi.org/10.1109/icsai.2016.7811095.
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OZTURK, Savas, Selma EREN YETIM, Ahmet Samet SAHIN, Kaan CEYHAN, Muhammet BASARAN, Gulay KOSE ASLAN, and Olcay OZTANIR. "Functionality, Performance and Usability Tests of WebRTC Based Video Conferencing Products." In 2021 15th Turkish National Software Engineering Symposium (UYMS). IEEE, 2021. http://dx.doi.org/10.1109/uyms54260.2021.9659594.
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Bardach, Lisa. "Can We Improve the Selection Into Teacher Education by Using Video-Based Situational Judgment Tests?" In 2020 AERA Annual Meeting. Washington DC: AERA, 2020. http://dx.doi.org/10.3102/1579946.
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Römhild, Wiebke, Philipp Russell, Christian Frühling, and Stefan Krüger. "Validation of Time Domain Seakeeping Computations Based on Capsizing Model Tests in Natural Seaways." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-78413.
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Abstract This paper presents further validation of the numerical computation method E4ROLLS, a nonlinear potential flow theory based seakeeping code, which is especially suitable for the early design stage due to its fast and efficient computation. The validation is achieved by comparison of simulation results with historical capsizing model test results of free-running self-propelled ship models in natural seaways. The results show that E4ROLLS is well-suited to assess the ships’ capsizing vulnerability, especially in following seas. Analysis of the historical tests’ video footage shows that the models’ capsizing in head seas was mainly induced by gusty wind. E4ROLLS is extended to include heeling moments caused by changing wind speeds and directions, so that wind-induced capsizing behavior can also be anticipated. The presented work highlights the benefits of model-scale seakeeping tests in natural seaways and shows that it is possible to assess the seakeeping of ships with fast and reliable methods in the early design stage.
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Backes, Marcos H., and Manuel M. Oliveira Neto. "A PatchMatch-based Approachfor Matte Propagation in Videos." In Concurso de Teses e Dissertações da SBC. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/ctd.2020.11367.
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This thesis presents a temporally-coherent matte-propagation method for videos based on PatchMatch and edge-aware filtering. Given an input video and trimaps for a few frames, including the first and last, our approach generates alpha mattes for all frames of the video sequence. We also present a user scribble-based interface for video matting that takes advantage of the efficiency of our method to interactively refine the matte results. We perform quantitative comparisons against the state-of-the-art sparse-input video matting techniques and show that our method produces significantly better results according to three different metrics. We also perform qualitative comparisons against the state-of-the-art dense-input video matting techniques and show that ours produces similar quality results while requiring less than 7% of their user input.
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Silva, Michel M., Mario F. M. Campos, and Erickson R. Nascimento. "Semantic Hyperlapse: a Sparse Coding-based and Multi-Importance Approach for First-Person Videos." In Concurso de Teses e Dissertações da SBC. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/ctd.2020.11364.
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The availability of low-cost and high-quality wearable cameras combined with the unlimited storage capacity of video-sharing websites have evoked a growing interest in First-Person Videos. Such videos are usually composed of long-running unedited streams captured by a device attached to the user body, which makes them tedious and visually unpleasant to watch. Consequently, it raises the need to provide quick access to the information therein. We propose a Sparse Coding based methodology to fast-forward First-Person Videos adaptively. Experimental evaluations show that the shorter version video resulting from the proposed method is more stable and retain more semantic information than the state-of-the-art. Visual results and graphical explanation of the methodology can be visualized through the link: https://youtu.be/rTEZurH64ME
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Akhter, Syed Humayun, and Rahman Md Mizanoor. "Framework for Implementing Educational Concept Videos at Bangladesh Open University." In Tenth Pan-Commonwealth Forum on Open Learning. Commonwealth of Learning, 2022. http://dx.doi.org/10.56059/pcf10.3749.
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Video has been widely used as an effective media for delivering varied educational contents through broadcast and/or web. Video-mediated learning has been expanded for its effectiveness, and no doubt, there is an evolution in the production of videos because of technological development. Now-a-day, one can make video rapidly without cost using his or her smartphone. In this way, characteristics of educational video have been changed and short duration videos are of very friendly to the mobile users, and the demand for concept video, also known as ‘explainer video’, is increasing day-by-day. In response, Bangladesh Open University (BOU) developed a framework for the effective use of educational concept videos. This paper discusses the framework for making concept video which consists of a methodology and design guidelines, and both are linked to learning objectives. Short duration concept videos prepared in the form of transformation of BOU texts using the framework was experimented in focus group discussions (FGDs) where it was compared with the long duration video lecture based on the same texts. This paper portrays the findings of FGDs. Results suggest for mainstreaming concept videos in the academic delivery at BOU.
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Stephens, Gregory, David Michalski, Chantal S. Parenteau, and Roger Burnett. "A Mathematical Model to Assess Occupant Compartment Intrusion on Rear Occupant Responses in Rear Crashes." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24613.
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Abstract Rear occupant protection in rear crashes is a complex issue. Structural intrusion has been shown to be a significant factor in the injury mechanism of second-row children. In this study, a new model was developed to help quantify dynamic second-row intrusion, in terms of displacement, velocity, and acceleration, and assess its effect on rear occupant responses as a function of time. A mathematical model was developed using crash test data based on two reconstructed field accidents involving two different rear-ended vehicles with second-row children. The model also used the corresponding FMVSS 301R-type rear barrier tests of a similar vehicle. The crash test pulse data and videos from FMVSS 301R-type tests were analyzed to determine the timing and magnitude of second-row intrusion. Crash tests that had been conducted to simulate the field accidents were then used to validate the model. These tests included instrumented ATDs (Anthropometric Test Device) seated in the second-row area of the struck vehicles. The biomechanical responses were used to assess the validity of the mathematical model. Comparison between the mathematical model and the test data showed good agreement. For example, the model correctly showed that the dynamic second-row intrusion was greater than residual/static intrusion/displacement. The model also predicted accelerations that were in good agreement with the test data. Video analysis and head/chest acceleration time histories of the ATD’s indicated that intrusion occurred early and was an important factor in the occupant responses. Both the extent and velocity of dynamic intrusion also influenced the biomechanical responses. The model predicted head and chest accelerations that were greater than the overall vehicle accelerations due to localized structural intrusion. The mathematical model developed in this study is a first to assess the dynamic effect of second-row intrusion on rear occupant responses. Identifying factors that influence injury mechanisms are important when assessing the potential effectiveness of countermeasures.
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Stinebring, David R., William A. Straka, and Steven M. Willits. "Hydrofoil Test Facility at ARL Penn State." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77448.
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The two-dimensional test section of the ARL/Penn State 12-inch water tunnel has been modified to allow a wide range of dynamic tests using hydrofoils. Three examples of test configurations for the hydrofoil test facility are given. These include tests of a single conventional hydrofoil with non-sinusoidal deflections, tests with two hydrofoils for studying tip vortex interactions, and tests of base ventilated supercavitating hydrofoils. When testing a single hydrofoil, the angle of attack can be varied as a function of time using a cam drive system. Arc length Reynolds number of over 1 million based on a 1.5-inch chord are possible. Hydrofoil lift, drag and pitching moment can be measured during transient operation with and without cavitation. Tip vortex interaction studies have been performed by using a second hydrofoil mounted upstream of the primary test hydrofoil. This upstream hydrofoil is inclined to the tunnel wall so only the tip projects in front of the downstream hydrofoil. The upstream hydrofoil can be traversed across the test section to study the tip vortex interactions. Supercavitating hydrofoils have been tested by ventilating behind a wedge installed along the tunnel wall upstream of the hydrofoil. A full range of test instrumentation is used to support the studies, such as LDV, PIV, high speed video, and acoustic measurements.
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Gushchin, Alexander, Anastasia Antsiferova, and Dmitriy Vatolin. "Shot Boundary Detection Method Based on a New Extensive Dataset and Mixed Features." In 31th International Conference on Computer Graphics and Vision. Keldysh Institute of Applied Mathematics, 2021. http://dx.doi.org/10.20948/graphicon-2021-3027-188-198.
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Shot boundary detection in video is one of the key stages of video data processing. A new method for shot boundary detection based on several video features, such as color histograms and object boundaries, has been proposed. The developed algorithm was tested on the open BBC Planet Earth [1] and RAI [2] datasets, and the MSU CC datasets, based on videos used in the video codec comparison conducted at MSU, as well as videos from the IBM set, were also plotted. The total dataset for algorithm development and testing exceeded the known TRECVID datasets. Based on the test results, the proposed algorithm for scene change detection outperformed its counterparts with a final F-score of 0.9794.
Звіти організацій з теми "Video- based tests"
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Baral, Aniruddha, Jeffery Roesler, and Junryu Fu. Early-age Properties of High-volume Fly Ash Concrete Mixes for Pavement: Volume 2. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-031.
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High-volume fly ash concrete (HVFAC) is more cost-efficient, sustainable, and durable than conventional concrete. This report presents a state-of-the-art review of HVFAC properties and different fly ash characterization methods. The main challenges identified for HVFAC for pavements are its early-age properties such as air entrainment, setting time, and strength gain, which are the focus of this research. Five fly ash sources in Illinois have been repeatedly characterized through x-ray diffraction, x-ray fluorescence, and laser diffraction over time. The fly ash oxide compositions from the same source but different quarterly samples were overall consistent with most variations observed in SO3 and MgO content. The minerals present in various fly ash sources were similar over multiple quarters, with the mineral content varying. The types of carbon present in the fly ash were also characterized through x-ray photoelectron spectroscopy, loss on ignition, and foam index tests. A new computer vision–based digital foam index test was developed to automatically capture and quantify a video of the foam layer for better operator and laboratory reliability. The heat of hydration and setting times of HVFAC mixes for different cement and fly ash sources as well as chemical admixtures were investigated using an isothermal calorimeter. Class C HVFAC mixes had a higher sulfate imbalance than Class F mixes. The addition of chemical admixtures (both PCE- and lignosulfonate-based) delayed the hydration, with the delay higher for the PCE-based admixture. Both micro- and nano-limestone replacement were successful in accelerating the setting times, with nano-limestone being more effective than micro-limestone. A field test section constructed of HVFAC showed the feasibility and importance of using the noncontact ultrasound device to measure the final setting time as well as determine the saw-cutting time. Moreover, field implementation of the maturity method based on wireless thermal sensors demonstrated its viability for early opening strength, and only a few sensors with pavement depth are needed to estimate the field maturity.
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Bates, C. Richards, Melanie Chocholek, Clive Fox, John Howe, and Neil Jones. Scottish Inshore Fisheries Integrated Data System (SIFIDS): Work package (3) final report development of a novel, automated mechanism for the collection of scallop stock data. Edited by Mark James and Hannah Ladd-Jones. Marine Alliance for Science and Technology for Scotland (MASTS), 2019. http://dx.doi.org/10.15664/10023.23449.
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[Extract from Executive Summary] This project, aimed at the development of a novel, automated mechanism for the collection of scallop stock data was a sub-part of the Scottish Inshore Fisheries Integrated Data Systems (SIFIDS) project. The project reviewed the state-of-the-art remote sensing (geophysical and camera-based) technologies available from industry and compared these to inexpensive, off-the -shelf equipment. Sea trials were conducted on scallop dredge sites and also hand-dived scallop sites. Data was analysed manually, and tests conducted with automated processing methods. It was concluded that geophysical acoustic technologies cannot presently detect individual scallop but the remote sensing technologies can be used for broad scale habitat mapping of scallop harvest areas. Further, the techniques allow for monitoring these areas in terms of scallop dredging impact. Camera (video and still) imagery is effective for scallop count and provide data that compares favourably with diver-based ground truth information for recording scallop density. Deployment of cameras is possible through inexpensive drop-down camera frames which it is recommended be deployed on a wide area basis for further trials. In addition, implementation of a ‘citizen science’ approach to wide area recording is suggested to increase the stock assessment across the widest possible variety of seafloor types around Scotland. Armed with such data a full, statistical analysis could be completed and data used with automated processing routines for future long-term monitoring of stock.
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Osypova, Nataliia V., and Volodimir I. Tatochenko. Improving the learning environment for future mathematics teachers with the use application of the dynamic mathematics system GeoGebra AR. [б. в.], July 2021. http://dx.doi.org/10.31812/123456789/4628.
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Immersive technologies and, in particular, augmented reality (AR) are rapidly changing the sphere of education, especially in the field of science, technology, engineering, arts and mathematics. High- quality professional training of a future mathematics teacher who is able to meet the challenges that permeate all sides, the realities of the globalizing information society, presupposes reliance on a highly effective learning environment. The purpose of the research is to transform the traditional educational environment for training future mathematics teachers with the use of the GeoGebra AR dynamic mathematics system, the introduction of cloud technologies into the educational process. The educational potential of GeoGebra AR in the system of professional training of future mathematics teachers is analyzed in the paper. Effective and practical tools for teaching mathematics based on GeoGebra AR using interactive models and videos for mixed and distance learning of students are provided. The advantages of the GeoGebra AR dynamic mathematics system are highlighted. The use of new technologies for the creation of didactic innovative resources that improve the process of teaching and learning mathematics is presented on the example of an educational and methodological task, the purpose of which is to create didactic material on the topic “Sections of polyhedra”. While solving it, future teachers of mathematics should develop the following constituent elements: video materials; test tasks for self-control; dynamic models of sections of polyhedra; video instructions for constructing sections of polyhedra and for solving basic problems in the GeoGebra AR system. The article highlights the main characteristics of the proposed educational environment for training future mathematics teachers using the GeoGebra AR dynamic mathematics system: interdisciplinarity, polyprofessionalism, dynamism, multicomponent.
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McKinnon, Mark, Craig Weinschenk, and Daniel Madrzykowski. Modeling Gas Burner Fires in Ranch and Colonial Style Structures. UL Firefighter Safety Research Institute, June 2020. http://dx.doi.org/10.54206/102376/mwje4818.
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The test scenarios ranged from fires in the structures with no exterior ventilation to room fires with flow paths that connected the fires with remote intake and exhaust vents. In the ranch, two replicate fires were conducted for each room of origin and each ventilation condition. Rooms of fire origin included the living room, bedroom, and kitchen. In the colonial, the focus was on varying the flow paths to examine the change in fire behavior and the resulting damage. No replicates were conducted in the colonial. After each fire scene was documented, the interior finish and furnishings were replaced in affected areas of the structure. Instrumentation was installed to measure gas temperature, gas pressure, and gas movement within the structures. In addition, oxygen sensors were installed to determine when a sufficient level of oxygen was available for flaming combustion. Standard video and firefighting IR cameras were also installed inside of the structures to capture information about the fire dynamics of the experiments. Video cameras were also positioned outside of the structures to monitor the flow of smoke, flames, and air at the exterior vents. Each of the fires were started from a small flaming source. The fires were allowed to develop until they self-extinguished due to a lack of oxygen or until the fire had transitioned through flashover. The times that fires burned post-flashover varied based on the damage occurring within the structure. The goal was have patterns remaining on the ceiling, walls, and floors post-test. In total, thirteen experiments were conducted in the ranch structure and eight experiments were conducted in the colonial structure. All experiments were conducted at UL's Large Fire Laboratory in Northbrook, IL. Increasing the ventilation available to the fire, in both the ranch and the colonial, resulted in additional burn time, additional fire growth, and a larger area of fire damage within the structures. These changes are consistent with fire dynamics based assessments and were repeatable. Fire patterns within the room of origin led to the area of origin when the ventilation of the structure was considered. Fire patterns generated pre-flashover, persisted post-flashover if the ventilation points were remote from the area of origin.
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DeJaeghere, Joan, Bich-Hang Duong, and Vu Dao. Teaching Practices That Support and Promote Learning: Qualitative Evidence from High and Low Performing Classes in Vietnam. Research on Improving Systems of Education (RISE), January 2021. http://dx.doi.org/10.35489/bsg-rise-ri_2021/024.
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This Insight Note contributes to the growing body of knowledge on teaching practices that foster student learning and achievement by analysing in-depth qualitative data from classroom observations and teacher interviews. Much of the research on teachers and teaching in development literature focuses on observable and quantified factors, including qualifications and training. But simply being qualified (with a university degree in education or subject areas), or trained in certain ways (e.g., coaching versus in-service) explains very little of the variation in learning outcomes (Kane and Staiger, 2008; Wößmann, 2003; Das and Bau, 2020). Teaching is a complex set of practices that draw on teachers’ beliefs about learning, their prior experiences, their content and pedagogical knowledge and repertoire, and their commitment and personality. Recent research in the educational development literature has turned to examining teaching practices, including content knowledge, pedagogical practices, and teacher-student interactions, primarily through quantitative data from knowledge tests and classroom observations of practices (see Bruns, De Gregorio and Taut, 2016; Filmer, Molina and Wane, 2020; Glewwe et al, in progress). Other studies, such as TIMSS, the OECD and a few World Bank studies have used classroom videos to further explain high inference factors of teachers’ (Gallimore and Hiebert, 2000; Tomáš and Seidel, 2013). In this Note, we ask the question: What are the teaching practices that support and foster high levels of learning? Vietnam is a useful case to examine because student learning outcomes based on international tests are high, and most students pass the basic learning levels (Dang, Glewwe, Lee and Vu, 2020). But considerable variation exists between learning outcomes, particularly at the secondary level, where high achieving students will continue to upper-secondary and lower achieving students will drop out at Grade 9 (Dang and Glewwe, 2018). So what differentiates teaching for those who achieve these high learning outcomes and those who don’t? Some characteristics of teachers, such as qualifications and professional commitment, do not vary greatly because most Vietnamese teachers meet the national standards in terms of qualifications (have a college degree) and have a high level of professionalism (Glewwe et al., in progress). Other factors that influence teaching, such as using lesson plans and teaching the national curriculum, are also highly regulated. Therefore, to explain how teaching might affect student learning outcomes, it is important to examine more closely teachers’ practices in the classroom.
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Floyd, Jason, and Daniel Madrzykowski. Analysis of a Near Miss in a Garden Apartment Fire – Georgia 2022. UL's Fire Safety Research Institute, October 2022. http://dx.doi.org/10.54206/102376/rsfd6862.
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On February 9, 2022, Cobb County Fire and Emergency Services responded to a fire in a ground floor unit in a garden apartment building. At arrival, the fire was a post-flashover fire in a bedroom. Initial fire control was attempted by an interior fire attack team which was unable to quickly locate the fire. Exterior suppression through the bedroom window was started prior to discovery of the fire by the interior team. Shortly after fire discovery by the internal team, a mayday was called. Four firefighters from the interior fire attack team received first and second degree burns. This report analyzes photographic, video, and written documentation from the incident to evaluate the timeline of the incident and to assess the fire conditions present. Computer modeling using the Fire Dynamics Simulator (FDS) was performed to provide further insight into the fire conditions and the impact of decisions and actions on the fire ground. Additionally, data from a full scale fire test of a similar fire in a similar structure was used to provide additional insight. Four FDS simulations were performed in support of the analysis. These included a simulation of the event as it unfolded and three simulations looking at the impact of alternate tactics which included: initial exterior attack prior to entry, the use of a smoke curtain to protect the building exit path, and interior only attack. FDS simulations provided insight on the heat present in the apartment during the fire and the impact of the interior and exterior suppression on conditions inside the apartment. Full scale test data of a similar fire showed similar behavior to the FDS predictions and gives credence to the FDS results. Results of the analysis suggest that injuries resulted from the length of time the interior attack team was present inside the apartment before actions were taken to reduce the severity of the fire. Six contributing factors were identified including size-up, communication and accountability, delayed exterior attack, lack of entry hall protection, the apartment layout and construction, thermal imager use, and mayday procedures and training. The last contributing factor was a positive contribution that helped avoid more serious injuries. Based on the contributing factors, five recommendations were made that include improved size-up, exterior fire control to prevent exterior spread, protection of exit pathways, basing fire ground tactics on known information, and recognizing when a change in tactics is needed.
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Stakes, Keith, and Joseph Willi. Study of the Fire Service Training Environment: Safety, Fidelity, and Exposure -- Acquired Structures. UL Firefighter Safety Research Institute, March 2019. http://dx.doi.org/10.54206/102376/ceci9490.
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Previous FSRI led research projects have focused on examining the fire environment with regards to current building construction methods, synthetic fuel loading, and best-practices in firefighting strategies and tactics. More than 50 experiments have been previously conducted utilizing furniture to produce vent-limited fire conditions, replicating the residential fire environment, and studying the methods of horizontal ventilation, vertical ventilation, and positive pressure attack. Tactical considerations generated from the research are intended to provide fire departments with information to evaluate their standard operating procedures and make improvements, if necessary, to increase the safety and effectiveness of firefighting crews. Unfortunately, there still exists a long standing disconnect between live-fire training and the fireground as evident by continued line of duty injury and death investigations that point directly to a lack of realistic yet safe training, which highlights a continued misunderstanding of fire dynamics within structures. The main objective of the Study of the Fire Service Training Environment: Safety, Fidelity, and Exposure is to evaluate training methods and fuel packages in several different structures commonly used across the fire service to provide and highlight considerations to increase both safety and fidelity. This report is focused on the evaluation of live-fire training in acquired structures. A full scale structure was constructed using a similar floor plan as in the research projects for horizontal ventilation, vertical ventilation, and positive pressure attack to provide a comparison between the modern fire environment and the training ground. The structure was instrumented which allowed for the quantification of fire behavior, the impact of various ventilation tactics, and provided the ability to directly compare these experiments with the previous research. Twelve full scale fire experiments were conducted within the test structure using two common training fuel packages: 1) pallets, and 2) pallets and oriented strand board (OSB). To compare the training fuels to modern furnishings, the experiments conducted were designed to replicate both fire and ventilation location as well as event timing to the previous research. Horizontal ventilation, vertical ventilation, and positive pressure attack methods were tested, examining the proximity of the vent location to the fire (near vs. far). Each ventilation configuration in this series was tested twice with one of the two training fuel loads. The quantification of the differences between modern furnishings and wood-based training fuel loads and the impact of different ventilation tactics is documented through a detailed comparison to the tactical fireground considerations from the previous research studies. The experiments were compared to identify how the type of fuel used in acquired structures impacts the safety and fidelity of live-fire training. The comparisons in this report characterized initial fire growth, the propensity for the fire to become ventilation limited, the fires response to ventilation, and peak thermal exposure to students and instructors. Comparisons examined components of both functional and physical fidelity. Video footage was used to assess the visual cues, a component of the fire environment that is often difficult to replicate in training due to fuel load restrictions. The thermal environment within the structure was compared between fuel packages with regards to the potential tenability for both students and instructors.
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Lee, W. S., Victor Alchanatis, and Asher Levi. Innovative yield mapping system using hyperspectral and thermal imaging for precision tree crop management. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7598158.bard.
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Original objectives and revisions – The original overall objective was to develop, test and validate a prototype yield mapping system for unit area to increase yield and profit for tree crops. Specific objectives were: (1) to develop a yield mapping system for a static situation, using hyperspectral and thermal imaging independently, (2) to integrate hyperspectral and thermal imaging for improved yield estimation by combining thermal images with hyperspectral images to improve fruit detection, and (3) to expand the system to a mobile platform for a stop-measure- and-go situation. There were no major revisions in the overall objective, however, several revisions were made on the specific objectives. The revised specific objectives were: (1) to develop a yield mapping system for a static situation, using color and thermal imaging independently, (2) to integrate color and thermal imaging for improved yield estimation by combining thermal images with color images to improve fruit detection, and (3) to expand the system to an autonomous mobile platform for a continuous-measure situation. Background, major conclusions, solutions and achievements -- Yield mapping is considered as an initial step for applying precision agriculture technologies. Although many yield mapping systems have been developed for agronomic crops, it remains a difficult task for mapping yield of tree crops. In this project, an autonomous immature fruit yield mapping system was developed. The system could detect and count the number of fruit at early growth stages of citrus fruit so that farmers could apply site-specific management based on the maps. There were two sub-systems, a navigation system and an imaging system. Robot Operating System (ROS) was the backbone for developing the navigation system using an unmanned ground vehicle (UGV). An inertial measurement unit (IMU), wheel encoders and a GPS were integrated using an extended Kalman filter to provide reliable and accurate localization information. A LiDAR was added to support simultaneous localization and mapping (SLAM) algorithms. The color camera on a Microsoft Kinect was used to detect citrus trees and a new machine vision algorithm was developed to enable autonomous navigations in the citrus grove. A multimodal imaging system, which consisted of two color cameras and a thermal camera, was carried by the vehicle for video acquisitions. A novel image registration method was developed for combining color and thermal images and matching fruit in both images which achieved pixel-level accuracy. A new Color- Thermal Combined Probability (CTCP) algorithm was created to effectively fuse information from the color and thermal images to classify potential image regions into fruit and non-fruit classes. Algorithms were also developed to integrate image registration, information fusion and fruit classification and detection into a single step for real-time processing. The imaging system achieved a precision rate of 95.5% and a recall rate of 90.4% on immature green citrus fruit detection which was a great improvement compared to previous studies. Implications – The development of the immature green fruit yield mapping system will help farmers make early decisions for planning operations and marketing so high yield and profit can be achieved.