Bibliographies thématiques / CVEMPs

Littérature scientifique sur le sujet « CVEMPs »

Auteur : Grafiati
Publié le 10 mars 2023
Mis à jour le 11 mars 2023

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Articles de revues sur le sujet "CVEMPs"

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Wang, Shou-Jen, Fu-Shan Jaw et Yi-Ho Young. « VESTIBULAR AFFERENTS POPULATION ACTIVATED BY VARIOUS MODES FOR ELICITING OCULAR AND CERVICAL VESTIBULAR-EVOKED MYOGENIC POTENTIALS ». Biomedical Engineering : Applications, Basis and Communications 23, no 06 (décembre 2011) : 527–32. http://dx.doi.org/10.4015/s1016237211002864.

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This study compared cervical and ocular vestibular-evoked myogenic potentials (cVEMPs and oVEMPs) between air-conducted sound (ACS) and bone-conducted vibration (BCV) modes to determine whether these two stimulation modes activate the same population of primary vestibular afferents. Fifteen healthy subjects underwent cVEMP and oVEMP tests using ACS stimuli at 127 dB pe SPL and BCV stimuli at 128 dB force level. The characteristic parameters of cVEMPs and oVEMPs were compared between ACS and BCV modes. The mean p13 and n23 latencies of ACS-cVEMPs were significantly longer than those of BCV-cVEMPs. Likewise, the mean nI and pI latencies for ACS-oVEMPs were also significantly longer than those for BCV-oVEMPs. There was no significant difference in the mean amplitude of cVEMPs between the ACS and BCV modes. However, comparing the oVEMP amplitude, a relationship: (Amplitude of BCV-oVEMP) = 2.3 x (Amplitude of ACS-oVEMP) was demonstrated. In conclusion, the population of primary vestibular afferents activated by ACS and BCV stimuli is similar for cVEMPs. In contrast with oVEMPs, BCV mode activates more number of primary vestibular afferents than ACS mode does. In interpreting oVEMP and cVEMP results, stimulation mode should be checked first.
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Di Lazzaro, Giulia, Tommaso Schirinzi, Maria Pia Giambrone, Roberta Di Mauro, Maria Giuseppina Palmieri, Camilla Rocchi, Michele Tinazzi, Nicola Biagio Mercuri, Stefano Di Girolamo et Antonio Pisani. « Pisa Syndrome in Parkinson’s Disease : Evidence for Bilateral Vestibulospinal Dysfunction ». Parkinson's Disease 2018 (15 octobre 2018) : 1–6. http://dx.doi.org/10.1155/2018/8673486.

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Introduction. Pisa syndrome (PS) is a postural complication of Parkinson’s disease (PD). Yet, its pathophysiology remains unclear, although a multifactorial component is probable. Cervical vestibular evoked myogenic potentials (cVEMPs) explore vestibulospinal pathway, but they have not been measured yet in PD patients with PS (PDPS) to assess a potential vestibular impairment. Materials and Methods. We enrolled 15 PD patients, 15 PDPS patients, and 30 healthy controls (HCs). They underwent neurological examination and were examined with Unified Parkinson’s Disease Rating Scale II-III (UPDRSII-III), audiovestibular workup, and cVEMP recordings. Data were analysed with Chi-square, one-way ANOVA, multinomial regression, nonparametric, and Spearman’s tests. Results. cVEMPs were significantly impaired in both PD and PDPS compared with HCs. PDPS exhibited more severe cVEMP abnormalities with prevalent bilateral loss of potentials, compared with the PD group, in which a prevalent unilateral loss was instead observed. No clinical-neurophysiological correlations emerged. Conclusions. Differently from HC, cVEMPs are altered in PD. Severity of cVEMPs alterations increases from PD without PS to PDPS, suggesting an involvement of vestibulospinal pathway in the pathophysiology of PS. Our results provide evidence for a significant impairment of cVEMPs in PDPS patients and encourage further studies to test validity of cVEMPs as diagnostic and prognostic biomarkers of PD progression.
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Sayed, Sharifah Zainon, et Nor Haniza Abdul Wahat. « Effects of Age on Cervical Vestibular Evoked Myogenic Potentials and Ocular Vestibular Evoked Myogenic Potentials Using 750 Hz Tone Burst Stimuli among Healthy Adults ». Malaysian Journal of Medical Sciences 29, no 4 (29 août 2022) : 53–64. http://dx.doi.org/10.21315/mjms2022.29.4.6.

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Background: The vestibular evoked myogenic potentials (VEMPs) response characteristics depend on age, stimulus and individual anatomical differences. Therefore, normative data are required for accurate VEMPs interpretations. This cross-sectional study investigates VEMPs age-related changes among healthy adults using 750 Hz short alternating tone burst (TB) stimuli. Methods: Fifty adults aged between 23 years old and 76 years old with a mean of 51.56 (SD = 16.44) years old underwent air-conducted (AC) cervical VEMP (cVEMP) and head taps ocular VEMPs (oVEMPs) testing. Results: The cVEMPs and oVEMPs response rates reduced significantly at the age of 50-year-old and above. No significant age trends were observed for both cVEMPs and oVEMPs latencies and asymmetry ratios. However, amplitude reduced with increasing age for both cVEMPs, P < 0.001 and oVEMPs, P = 0.01. No significant differences in cVEMPs and oVEMPs latencies, amplitude or asymmetry ratios were identified between gender. Conclusion: To the best of our knowledge, this is the first published normative data for cVEMPs and oVEMPS in Malaysia and Southeast Asia, obtained among healthy adults aged between 23 years old and 76 years old. Health professionals in the region can use these findings as VEMPs normative references in their clinical settings.
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van Tilburg, Mark J., Barbara S. Herrmann, Steven D. Rauch, Kimberley Noij et John J. Guinan. « Normalizing cVEMPs ». Ear and Hearing 40, no 4 (2019) : 878–86. http://dx.doi.org/10.1097/aud.0000000000000668.

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Takeuti, Alice, Ana Correa, Elisa Leao et Mariana Favero. « The Relationship between the Etiology of Profound Prelingual Sensorineural Hearing Loss and the Results of Vestibular-Evoked Myogenic Potentials ». International Archives of Otorhinolaryngology 23, no 01 (5 juillet 2018) : 001–6. http://dx.doi.org/10.1055/s-0038-1649491.

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Introduction Cervical vestibular-evoked myogenic potentials (cVEMPs) are biphasic, short latency potentials, which represent the inhibition of the contraction of the sternocleidomastoid muscle (SCM) mediated by the saccule, the inferior vestibular nerve, the vestibular nuclei and the medial vestibular spinal tract. Objective To evaluate the response of cVEMPs in individuals with profound prelingual bilateral cochlear hearing loss. Methods A prospective case-control study. A total of 64 volunteers, divided into a study group (31 patients with profound prelingual sensorineural hearing loss) and a control group (33 subjects matched for age and gender with psychoacoustic thresholds of ≤ 25 dB HL between 500 and 8,000 Hz) were submitted to the cVEMP exam. The causes of hearing loss were grouped by etiology and the involved period. Results The subjects of the study group are more likely to present changes in cVEMPs compared to the control group (35.5% versus 6.1% respectively; p = 0.003), with an odds ratio (OR) of 8.52 (p = 0.009). It means that they had 8.52-fold higher propensity of presenting altered cVEMP results. There were no statistically significant differences between the latencies, the interamplitude and the asymmetry index. Regarding the etiology, there was a statistically significant difference when the cause was infectious, with an OR of 15.50 (p = 0.005), and when the impairment occurred in the prenatal period, with an OR of 9.86 (p = 0.009). Conclusion The present study showed abnormalities in the sacculocolic pathway in a considerable portion of individuals with profound prelingual sensorineural hearing loss due to infectious and congenital causes, as revealed by the cVEMP results.
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Govender, Sendhil, et James G. Colebatch. « Effects of midline sagittal location on bone-conducted cervical and ocular vestibular evoked myogenic potentials ». Journal of Applied Physiology 122, no 6 (1 juin 2017) : 1470–84. http://dx.doi.org/10.1152/japplphysiol.01069.2016.

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We have investigated the effectiveness of two bone-conducted (BC) stimuli in producing vestibular evoked myogenic potentials (VEMPs) following stimulation along midsagittal skull sites. Twenty subjects (mean age 24 yr, range: 18–34 yr; 6 men; 14 women) were studied using a smoothed impulse and a 500-Hz tone burst applied to Nz, Fpz, AFz, Fz, FCz, and Cz with both compressive and rarefactive onset phases. Cervical (cVEMPs) and ocular VEMPs (oVEMPs) were recorded as well as linear acceleration in three axes. cVEMPs evoked by 500 Hz showed no change in response polarity to either stimulus location or phase. cVEMPs evoked by the impulsive stimulus showed larger initial peak amplitudes at AFz and Fz using compressive stimuli and differences in initial peak latency between the two phases. In contrast, amplitude, latency, and response polarity for oVEMPs were markedly affected by stimulus location and phase, which were similar for both BC stimuli, with little correlation with induced acceleration of the head. Latencies were earliest at AFz and Fz where compressive onset stimuli evoked an initial negativity (average latency 8.6–11.0 ms). At other sites compressive onset stimuli usually evoked oVEMPs with an initial positivity. We conclude that both 500 Hz and impulsive stimuli are effective means of evoking cVEMPs and oVEMPs from mid sagittal skull sites. The effects depend upon both location and phase and differ for oVEMPs and cVEMPs. Initial negativities for oVEMPs following compressive stimuli were most consistently obtained using the AFz and Fz sites. NEW & NOTEWORTHY We investigated the effect of stimulus location and phase (compressive and rarefactive) in the midsagittal plane for the cVEMP and oVEMP evoked by bone-conducted (BC) 500 Hz and BC impulsive stimuli. For cVEMPs, location effects were limited but were observed for BC impulses. For oVEMPs, both stimuli affected amplitude, latency, and polarity, depending on stimulus location and phase. Compressive stimuli at Fz and AFz evoked early negative oVEMPs most reliably.
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Lachowska, Magdalena, Beata Zakrzewska-Pniewska, Monika Nojszewska et Kazimierz Niemczyk. « Air-conducted cervical and ocular vestibular evoked miogenic potentials in patients with Susac’s syndrome ». Polski Przegląd Otorynolaryngologiczny 7, no 2 (30 juin 2018) : 6–10. http://dx.doi.org/10.5604/01.3001.0012.1070.

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Aim: To evaluate acoustically evoked cervical and ocular vestibular miogenic potentials (AC cVEMP and oVEMP) findings in patients with Susac’s syndrome. We did not seek for a diagnostic replacement test in those patients, but we investigated if the combined application of AC cVEMP and oVEMPs might be helpful as an additional source of information about the disease. Methods: To record VEMPs the EMG standardization method was used to continuously monitor and minimize the variability of the recordings. The stimuli were presented unilaterally one ear at a time. The waveforms were analyzed for the response presence, latency and amplitude. Results: In the patient #1 stimulation resulted in responses on both sides with latencies within normal and symmetry limits for both c- and oVEMPs; however, the responses presented small amplitudes for cVEMPs. In patient #2, only cVEMPs were present. The P1 latencies were within normative values but amplitudes were low, in addition showing asymmetry between sides with right side amplitude being smaller. Conclusion: The information provided by the combined application of AC cVEMP and oVEMP might be useful in diagnosis of Susac’s syndrome revealing additional information about the affected vestibular system and be of help in treatment and rehabilitation planning.
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Ibraheem, Ola, et Mohammad Hassaan. « Cervical Vestibular-Evoked Myogenic Potentials in Sedated Toddlers ». International Archives of Otorhinolaryngology 22, no 03 (21 mars 2017) : 197–202. http://dx.doi.org/10.1055/s-0037-1599151.

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Introduction Cervical vestibular-evoked myogenic potentials (cVEMPs) are difficult to test in toddlers who cannot follow instructions or stay calm. Objective Due to the growing need for vestibular testing in very young children as a part of a delayed walking assessment battery, this study aimed to provide a solution to this problem by recording the cVEMPs in toddlers during sedation. Method The cVEMPs measures were assessed in 30 toddlers aged 12 to 36 months with normal motor milestones. They were sedated with chloral hydrate. Then, the head was retracted ∼ 30° backward with a pillow under the shoulders, and turned 45° contralateral to the side of stimulation to put the sternocleidomastoid (SCM) muscle in a state of tension. Results The P13 and N23 waves of the cVEMPs were recordable in all sedated toddlers. The cVEMPs measures resulted in the following: P13 latency of 17.5 ± 1.41 milliseconds, N23 latency of 25.58 ± 2.02 milliseconds, and peak-to-peak amplitude of 15.39 ± 3.45 µV. One-sample t-test revealed statistically significant longer latencies and smaller amplitude of the toddlers' cVEMPs relative to the normative data for adults. Conclusions The difficulty of cVEMPs testing in toddlers can be overcome by sedating them and attaining a position that contracts the SCM muscle. However, the toddlers' recordings revealed delayed latencies and smaller amplitudes than those of adults.
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Emami, Seyede Faranak, Akram Pourbakht, Kianoush Sheykholeslami, Mohammad Kamali, Fatholah Behnoud et Ahmad Daneshi. « Vestibular Hearing and Speech Processing ». ISRN Otolaryngology 2012 (14 février 2012) : 1–7. http://dx.doi.org/10.5402/2012/850629.

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Vestibular hearing in human is evoked as a result of the auditory sensitivity of the saccule to low-frequency high-intensity tone. The objective was to investigate the relationship between vestibular hearing using cervical vestibular-evoked myogenic potentials (cVEMPs) and speech processing via word recognition scores in white noise (WRSs in wn). Intervention comprised of audiologic examinations, cVEMPs, and WRS in wn. All healthy subjects had detectable cVEMPs (safe vestibular hearing). WRSs in wn were obtained for them (66.9 ± 9.3% in the right ears and 67.5 ± 11.8% in the left ears). Dizzy patients in the affected ears, had the cVEMPs abnormalities (insecure vestibular hearing) and decreased the WRS in wn (51.4 ± 3.8% in the right ears and 52.2 ± 3.5% in the left ears). The comparison of the cVEMPs between the subjects revealed significant differences (P < 0.05). Therefore, the vestibular hearing can improve the speech processing in the competing noisy conditions.
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Emami, Seyede Faranak, et Ahmad Daneshi. « Vestibular Hearing and Neural Synchronization ». ISRN Otolaryngology 2012 (15 mars 2012) : 1–5. http://dx.doi.org/10.5402/2012/246065.

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Objectives. Vestibular hearing as an auditory sensitivity of the saccule in the human ear is revealed by cervical vestibular evoked myogenic potentials (cVEMPs). The range of the vestibular hearing lies in the low frequency. Also, the amplitude of an auditory brainstem response component depends on the amount of synchronized neural activity, and the auditory nerve fibers' responses have the best synchronization with the low frequency. Thus, the aim of this study was to investigate correlation between vestibular hearing using cVEMPs and neural synchronization via slow wave Auditory Brainstem Responses (sABR). Study Design. This case-control survey was consisted of twenty-two dizzy patients, compared to twenty healthy controls. Methods. Intervention comprised of Pure Tone Audiometry (PTA), Impedance acoustic metry (IA), Videonystagmography (VNG), fast wave ABR (fABR), sABR, and cVEMPs. Results. The affected ears of the dizzy patients had the abnormal findings of cVEMPs (insecure vestibular hearing) and the abnormal findings of sABR (decreased neural synchronization). Comparison of the cVEMPs at affected ears versus unaffected ears and the normal persons revealed significant differences (P<0.05). Conclusion. Safe vestibular hearing was effective in the improvement of the neural synchronization.
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Thèses sur le sujet "CVEMPs"

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Weiser, Christian Marcus [Verfasser], Stefan K. R. [Gutachter] Plontke, Torsten [Gutachter] Rahne, Dietmar [Gutachter] Basta et Alexander [Gutachter] Huber. « Vergleich verschiedener Vorspannungsmethoden des Musculus sternocleidomastoideus bei der Neurofeedback kontrollierte n Ableitung zervikaler vestibulär evozier ter myogener Potentiale ( cVEMPs) / Christian Marcus Weiser ; Gutachter : Stefan K.-R. Plontke, Torsten Rahne, Dietmar Basta, Alexander Huber ». Halle (Saale) : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2020. http://d-nb.info/1220698148/34.

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Gomes, George Allan Menezes. « CRAbCVE- An Architecture for CVEs through the Internet ». Universidade Federal do CearÃ, 2005. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1959.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico
Although the complexities of many tasks encountered in modern societies require the join effort of groups of people in order to be accomplished, cooperative work is still a difficult job. Usually the difficulties arise due to lack of appropriate coordination, poor definition of the context in which the activities are to be performed individually or in group; thus, generating redundancies, inconsistencies and contradictions within the workgroup. In order to overcome these problems, a new field of research, called Computer Supported Cooperative Work (CSCW), was created to seek means of properly supporting work groups. Despite the favorable results achieved by CSCW, thus far, tools that provide a high level of interaction among the group members and the leaders of sub-groups are still not satisfactory. The use of virtual reality within cooperative systems allows the interactions among participants to be highly spontaneous, because, in virtual environments, communication by means of image, text and audio is possible. The Collaborative Virtual Environments (CVEs), which employ shared virtual reality technology, have proved to possess great potential for collaborative work. Therefore, collaborative virtual environments have been developed taking into consideration the results obtained by CSCW research. Nonetheless, developing CVEs is complicated, since they demand a great deal of resources, and need to incorporate concepts and recommendations from several research fields, such as Virtual Reality (VR), Computer Supported Cooperative Work and l Distributed Computing. The main objective of this dissertation is to design a generic architecture (CRAbCVE) for allowing distribution of several collaborative virtual environments within a network of servers on the Internet. This architecture defines specialized components, capable of distributing the processing that takes place in the CVE, thus obtaining a great computational power at low costs. Another important objective is the specification of a Model of Authorship in CVEs (MAC) for helping to integrate the CRAbCVE architecture into the framework of collaborative work. All models proposed herein have been incorporated into a prototype system and a simple case study has been analyzed.
A complexidade das tarefas do mundo atual requer cada vez mais a cooperaÃÃo das pessoas para sua execuÃÃo. Entretanto cooperar nÃo à uma tarefa fÃcil, e, muitas vezes, por falta de coordenaÃÃo adequada ou por uma definiÃÃo pobre do contexto em que as atividades dos participantes individualmente ou do grupo serÃo realizadas, sÃo geradas redundÃncias, inconsistÃncias e contradiÃÃes dentro do trabalho em grupo. Para evitar esses problemas, a Ãrea de CSCW (Computer Supported Cooperative Work) vem buscando meios de suportar adequadamente o trabalho em equipe. Apesar dos bons resultados alcanÃados pela Ãrea de CSCW, o principal obstÃculo enfrentado pelos seus desenvolvedores à fornecer interatividade a suas aplicaÃÃes. O uso de realidade virtual em sistemas cooperativos permite aos participantes interagirem com o mais alto grau de naturalidade, pois atravÃs do ambiente virtual à possÃvel a comunicaÃÃo por meio de imagem, texto e Ãudio. Os CVEs (Collaborative Virtual Environments) fazem uso da tecnologia de realidade virtual distribuÃda e apresentam grande potencial para o suporte ao trabalho colaborativo. Por conseguinte, esses ambientes virtuais colaborativos tÃm sido desenvolvidos, levando em consideraÃÃo os resultados obtidos na Ãrea de CSCW. Entretanto, desenvolver CVEs à uma tarefa complicada, pois eles sÃo grandes consumidores de recursos, e precisam incorporar conceitos e recomendaÃÃes de vÃrias Ãreas de pesquisa, como a de Realidade Virtual (RV), a de Trabalho Colaborativo Assistido por Computador (CSCW) e a de Sistemas Computacionais DistribuÃdos. O principal objetivo dessa dissertaÃÃo à a definiÃÃo de uma arquitetura de uso genÃrico, a CRAbCVE, projetada para viabilizar vÃrios Ambientes virtuais colaborativos (CVEs) distribuÃdos em uma rede de servidores na Internet. Essa arquitetura define componentes especializados, capazes de distribuir, atravÃs da Internet, o processamento de todo o CVE; obtendo-se, assim, um grande poder computacional a um baixo custo. Outro importante objetivo à a definiÃÃo do modelo MAC (Modelo de Autoria em CVEs), que visa auxiliar o emprego da arquitetura CRAbCVE no trabalho colaborativo. Os modelos propostos foram incorporados em um sistema protÃtipo e um estudo de caso simples foi analisado.
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Drozd, Adam. « Extracting and visualising scenes from within recordings of CVEs ». Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403415.

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Gomes, George Allan Menezes. « CRAbCVE- Uma arquitetura para viabilização de CVEs através da Internet ». reponame:Repositório Institucional da UFC, 2005. http://www.repositorio.ufc.br/handle/riufc/18067.

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GOMES, George Allan Menezes. CRAbCVE- Uma arquitetura para viabilização de CVEs através da Internet. 2005. 170 f. : Dissertação (mestrado) - Universidade Federal do Ceará, Centro de Ciências, Departamento de Computação, Fortaleza-CE, 2005.
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Although the complexities of many tasks encountered in modern societies require the join effort of groups of people in order to be accomplished, cooperative work is still a difficult job. Usually the difficulties arise due to lack of appropriate coordination, poor definition of the context in which the activities are to be performed individually or in group; thus, generating redundancies, inconsistencies and contradictions within the workgroup. In order to overcome these problems, a new field of research, called Computer Supported Cooperative Work (CSCW), was created to seek means of properly supporting work groups. Despite the favorable results achieved by CSCW, thus far, tools that provide a high level of interaction among the group members and the leaders of sub-groups are still not satisfactory. The use of virtual reality within cooperative systems allows the interactions among participants to be highly spontaneous, because, in virtual environments, communication by means of image, text and audio is possible. The Collaborative Virtual Environments (CVEs), which employ shared virtual reality technology, have proved to possess great potential for collaborative work. Therefore, collaborative virtual environments have been developed taking into consideration the results obtained by CSCW research. Nonetheless, developing CVEs is complicated, since they demand a great deal of resources, and need to incorporate concepts and recommendations from several research fields, such as Virtual Reality (VR), Computer Supported Cooperative Work and l Distributed Computing. The main objective of this dissertation is to design a generic architecture (CRAbCVE) for allowing distribution of several collaborative virtual environments within a network of servers on the Internet. This architecture defines specialized components, capable of distributing the processing that takes place in the CVE, thus obtaining a great computational power at low costs. Another important objective is the specification of a Model of Authorship in CVEs (MAC) for helping to integrate the CRAbCVE architecture into the framework of collaborative work. All models proposed herein have been incorporated into a prototype system and a simple case study has been analyzed.
A complexidade das tarefas do mundo atual requer cada vez mais a cooperação das pessoas para sua execução. Entretanto cooperar não é uma tarefa fácil, e, muitas vezes, por falta de coordenação adequada ou por uma definição pobre do contexto em que as atividades dos participantes individualmente ou do grupo serão realizadas, são geradas redundâncias, inconsistências e contradições dentro do trabalho em grupo. Para evitar esses problemas, a área de CSCW (Computer Supported Cooperative Work) vem buscando meios de suportar adequadamente o trabalho em equipe. Apesar dos bons resultados alcançados pela área de CSCW, o principal obstáculo enfrentado pelos seus desenvolvedores é fornecer interatividade a suas aplicações. O uso de realidade virtual em sistemas cooperativos permite aos participantes interagirem com o mais alto grau de naturalidade, pois através do ambiente virtual é possível a comunicação por meio de imagem, texto e áudio. Os CVEs (Collaborative Virtual Environments) fazem uso da tecnologia de realidade virtual distribuída e apresentam grande potencial para o suporte ao trabalho colaborativo. Por conseguinte, esses ambientes virtuais colaborativos têm sido desenvolvidos, levando em consideração os resultados obtidos na área de CSCW. Entretanto, desenvolver CVEs é uma tarefa complicada, pois eles são grandes consumidores de recursos, e precisam incorporar conceitos e recomendações de várias áreas de pesquisa, como a de Realidade Virtual (RV), a de Trabalho Colaborativo Assistido por Computador (CSCW) e a de Sistemas Computacionais Distribuídos. O principal objetivo dessa dissertação é a definição de uma arquitetura de uso genérico, a CRAbCVE, projetada para viabilizar vários Ambientes virtuais colaborativos (CVEs) distribuídos em uma rede de servidores na Internet. Essa arquitetura define componentes especializados, capazes de distribuir, através da Internet, o processamento de todo o CVE; obtendo-se, assim, um grande poder computacional a um baixo custo. Outro importante objetivo é a definição do modelo MAC (Modelo de Autoria em CVEs), que visa auxiliar o emprego da arquitetura CRAbCVE no trabalho colaborativo. Os modelos propostos foram incorporados em um sistema protótipo e um estudo de caso simples foi analisado
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Fraser, Mike C. « Working with objects in collaborative virtual environments ». Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364659.

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Murnane, Owen D., Faith W. Akin, J. K. Kelly, Stephanie M. Byrd et A. Pearson. « Comparative Properties of Cervical and Ocular Vestibular Evoked Myogenic Potentials ». Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/1886.

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Barkels, David, et Johan Åberg. « Mapping leachates and subsurface structures using different geophysical methods ». Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171814.

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The enrichment of ore produces large amounts of sulfur and metal-rich residual waste called tailings, which need to be deposited and stored for a long time. When the tailing is oxidized, large amounts of protons and metals are dissolved and diffuse to the groundwater. This poses a major environmental threat to biological life forms in the downstream ecosystem (Karltorp, 2008). In this study, leachate plumes and geological structures surrounding the tailings impoundment at the Kringelgruvan mine in northern Sweden have been successfully mapped using geophysical methods. Three methods have been used in parallel, slingram, ground penetrating radar (GPR) and electrical resistivity measurements, known as continuous vertical electrical sounding (CVES). The resulting data from GPR and CVES have been co-analyzed using Matlab. Algorithms have been produced that plots underground structures from CVES and compares them with interpreted structures from GPR. Studies have shown that the GPR is more sensitive than CVES to local variations of substructures when used in shallow soil cover, while CVES gives considerably more information regarding localization of the leachates and other electrically conductive materials, such as ore. Slingram EM31 has been shown to be the most time-efficient method to localize groundwater flow.
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Akin, Faith W., Owen D. Murnane, Joanna W. Tampas, Christopher Clinard, Stephanie Byrd et J. Kip Kelly. « The Effect of Noise Exposure on the Cervical Vestibular Evoked Myogenic Potential ». Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/1782.

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Objective: The purpose of this study was to investigate the effects of noise exposure on the cervical vestibular evoked myogenic potential (cVEMP) in individuals with asymmetric noise-induced sensorineural hearing loss (NIHL). Design: A cross-sectional observational study was used to compare cVEMP characteristics in 43 individuals with a history of noise exposure greater in one ear (e.g., the left ear of a right-handed rifle shooter) and asymmetric sensorineural hearing loss consistent with the history of noise exposure and in 14 age-matched controls. The characteristics of hearing loss were examined further for the noise-exposed participants with abnormal cVEMPs and the noise-exposed participants with normal cVEMPs. Results: Thirty-three percent of the noise-exposed participants had abnormal cVEMPs, whereas cVEMPs were present and symmetrical in 100% of the age-matched controls, and cVEMP threshold was greater in the noise-exposed group than in the control group. Abnormal cVEMPs occurred most often in the ears with poorer hearing (or greater NIHL), and the noise-exposed participants who had abnormal cVEMPs had poorer high-frequency pure-tone thresholds (greater NIHL) and greater interaural high-frequency pure-tone threshold differences than the noise-exposed participants with normal cVEMPs. Conclusions: These findings are consistent with previous studies that suggest that the sacculocollic pathway may be susceptible to noise-related damage. There is emerging evidence that the severity of NIHL is associated with the presence or absence of cVEMPs.
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Pecci, Rudi. « La Diagnosi audiologica e vestibolare dei tumori dell’angolo ponto-cerebellare : nuova proposta di screening per l’accesso alla neuroimaging ». Doctoral thesis, 2012. http://hdl.handle.net/2158/1191375.

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La Risonanza Magnetica (RM) con gadolinio è il gold standard per la diagnosi di neurinoma dell’acustico nei pazienti con ipoacusia neurosensoriale monolaterale o con asimmetria uditiva, ma i Potenziali Evocati Uditivi del Tronco-Encefalo (Auditory Brainstem Responses, ABR) rappresentano un’utile metodica di screening per l’accesso alla neuro-imaging. Il limite degli ABR è la bassa sensibilità per i tumori di piccole dimensioni (< 2 cm): per tumori più piccoli di 15 mm nella componente extracanalare è stata riportata una percentuale di falsi negativi pari al 22%, e per i tumori intracanalari è stata riportata una sensibilità del solo 67%. Con il nostro studio abbiamo voluto verificare se è possibile raggiungere una sensibilità più alta rispetto a quella dei soli ABR, associando questo esame ai Potenziali Evocati Miogeni Vestibolari cervicali (cervical Vestibular Evoked Myogenic Potentials, cVEMPs), al test di iperventilazione, all’Head Shaking Test (HST) e all’Head Impulse Test (HIT). Per fare questo abbiamo selezionato un gruppo di pazienti con neurinoma dell’acustico di dimensioni inferiori a 2 cm documentato alla RM e abbiamo verificato come si comportano sia i test elettrofisiologici (ABR e cVEMPs), sia i test otoneurologici per lo studio del riflesso vestibolo-oculomotore (VOR), e cioè test di iperventilazione, HST e HIT, in ciascun paziente. Dall’analisi dei nostri risultati si rileva che i potenziali evocati uditivi da soli sono in grado di identificare i pazienti con neurinoma dell’acustico, di dimensioni inferiori a 2 cm, nell’85.7% dei casi. La stessa sensibilità è stata riscontrata per i potenziali evocati vestibolari, mentre i test otoneurologici bed-side mostrano una sensibilità rispettivamente del 46.6% per l’HST, del 40.6% per l’HIT e dell’80.0% per il test di iperventilazione. In particolare, i test da noi utilizzati a complemento degli ABR, considerati nel loro insieme ma separatamente da questi, hanno dato il loro contributo in 14 pazienti su 15 (cioè nel 93.3% dei casi). Questo vuol dire che, in questo tipo di pazienti, associando agli ABR un altro test elettrofisiologico e tre test bed-side, anche se gli ABR risultassero negativi, avremmo comunque una sensibilità del 93.3%, contro una sensibilità dell’85.7% dei soli ABR. Se poi consideriamo tutti i test, compresi gli ABR, nessun paziente della nostra casistica sfugge alla diagnosi, cioè raggiungiamo una sensibilità del 100%. Purtroppo, date le limitate dimensioni del nostro gruppo di pazienti, abbiamo trovato solo due casi di neurinoma dell’acustico con ABR normale: uno di 6 mm e limitato al condotto uditivo interno, l’altro più piccolo di 2 cm e localizzato nella coclea. Questi due casi sarebbero sfuggiti alla diagnosi se per l’accesso alla RM fossero stati presi in considerazione solo i risultati dei potenziali evocati uditivi. In entrambi i casi, tuttavia, altri due test tra quelli effettuati risultavano positivi, più precisamente i cVEMPs e il test di iperventilazione. Se eliminiamo dalla valutazione i due test cefalici che da soli hanno mostrato la sensibilità più bassa, cioè l’HST e l’HIT, gli altri due test da noi utilizzati a complemento degli ABR, considerati nel loro insieme ma separatamente da questi, hanno dato il loro contributo in 14 pazienti su 15 (cioè ancora nel 93.3% dei casi). E anche in questo caso, se consideriamo tutti e 3 i test, compresi gli ABR, nessun paziente della nostra casistica sfugge alla diagnosi, cioè raggiungiamo una sensibilità del 100%. Questo vuol dire che eliminando HST e HIT la nostra accuratezza non cambia. In conclusione, sulla base dei nostri risultati, riteniamo di poter suggerire di continuare ad utilizzare i potenziali evocati uditivi come primo test di screening per l’accesso alla diagnostica per immagini nei pazienti con ipoacusia neurosensoriale monolaterale o con asimmetria uditiva. Se gli ABR risultano negativi, suggeriamo di associare a questi per lo meno i potenziali vestibolari miogeni e il test di iperventilazione; se almeno uno di questi due ultimi test risulta positivo, a nostro avviso è opportuno richiedere una RM dell’encefalo con gadolinio, anche di fronte ad un normale tracciato ABR.
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Sung, Pei-Shan, et 宋佩珊. « AED App : A public health application by using open data ». Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cvedmp.

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碩士
東海大學
資訊工程學系
103
Open Data is supported by many countries, and actively promote by the government to promote public participation and policy transparency. The presented study will focus on how to use open data and how to use information technology tools to help people in their daily life. AED (Automated External Defibrillator) is an aid device for sudden cardiac death. However, it is not easy to maintain all of the AEDs because there are many types AED models. The study presents a mobile service for manage the AEDs, and help people understand the operate AEDs. The application also provides nearby medical institutions, so that there are more chances for increase the emergency rescue time. The open data in this study is provided by the Health and Welfare Ministry of Taichung City Government. The mobile application is combined with emergency contact person setting, AED distribution first aid procedures, as well as AED adoption and other functions. The App allows people understand the AED placement and promote the importance of the AED devices. The provided AED Open Data is useful for public affairs, and the presented application can help people in emergency training to save people’s lives.
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Livres sur le sujet "CVEMPs"

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Control verification examinations (CVE's) of foreign passenger vessels. Washington, DC (2100 Second St., SW, Washington 20593-0001) : U.S. Dept. of Transportation, U.S. Coast Guard, 1993.

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Chapitres de livres sur le sujet "CVEMPs"

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Basta, D., et A. Ernst. « cVEMPs im klinischen Einsatz ». Dans Vertigo — Kontroverses und Bewährtes, 39–44. Vienna : Springer Vienna, 2011. http://dx.doi.org/10.1007/978-3-7091-0736-2_4.

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Greenhalgh, Chris. « CVEs : a Review ». Dans Large Scale Collaborative Virtual Environments, 17–29. London : Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-0867-2_2.

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Aghaei, Ehsan, Waseem Shadid et Ehab Al-Shaer. « ThreatZoom : Hierarchical Neural Network for CVEs to CWEs Classification ». Dans Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 23–41. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63086-7_2.

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Hindmarsh, Jon, Mike Fraser, Christian Heath et Steve Benford. « Virtually Missing the Point : Configuring CVEs for Object-Focused Interaction ». Dans Collaborative Virtual Environments, 115–39. London : Springer London, 2001. http://dx.doi.org/10.1007/978-1-4471-0685-2_7.

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Khoury, Raphaël, Benjamin Vignau, Sylvain Hallé, Abdelwahab Hamou-Lhadj et Asma Razgallah. « An Analysis of the Use of CVEs by IoT Malware ». Dans Foundations and Practice of Security, 47–62. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70881-8_4.

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Talamo, Alessandra, et Maria Beatrice Ligorio. « Ethnomethods as Resources for Developing CVEs in the ITCOLE Project ». Dans Computer Support for Collaborative Learning, 644–45. New York : Routledge, 2023. http://dx.doi.org/10.4324/9781315045467-151.

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Gembler, Felix, Piotr Stawicki, Aya Rezeika et Ivan Volosyak. « A Comparison of cVEP-Based BCI-Performance Between Different Age Groups ». Dans Advances in Computational Intelligence, 394–405. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20521-8_33.

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Economou, Daphne, et Steve Pettifer. « Toward a User-Centered Method for Studying CVEs for Learning ». Dans Developing Future Interactive Systems, 269–301. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-411-8.ch010.

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This chapter addresses one of the challenges the collaborative virtual environments (CVEs) research community faces which is the lack of a systematic approach to study social interaction in CVEs, determine requirements for CVE systems design, and inform the CVE systems design. It does this by presenting a method for studying multi-user systems in an educational context. The method has been developed as part of the Senet project, which is investigating the use of virtual actors in CVEs for learning. Groupware prototypes are studied in order to identify requirements and design factors for CVEs. The method adopts a rigorous approach for organizing experimental settings, collecting and analysing data, and informing CVE systems design. The analysis part of the method shares many of the Interaction Analysis foci and expands on it by providing a grid-based method of transforming rich qualitative data in a quantitative form. The outcome of this analysis is used for the derivation of design guidelines that can inform the construction of CVEs for learning. The method is described by a third phase of work in the Senet project.
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Zapala, David A. « Vertigo and Imbalance ». Dans Clinical Neurophysiology, 869–912. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780190259631.003.0052.

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Electrophysiologic testsests can be used to evaluate the function of each of the five vestibular sensory receptors in the labyrinth, in patients with dizziness and imbalance. Tests of semicircular canal function concentrate on vestibular ocular reflex behavior and include the bilateral, bi-thermal caloric test, video head impulse tests (vHIT), and rotary chair tests. Otolith function tests focus on changes in muscle tone and include the cervical and ocular vestibular evoked myogenic potentials (cVEMP and oVEMP). Interpreting vestibular tests requires an understanding of the underlying anatomy and physiology, and an appreciation of central compensation processes and their effects on each test. This chapter reviews the techniques and interpretation of vestibular testing to assess semicircular canal and otolith function and postural control.
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Truman, Barbara, et Jaclyn M. Truman. « Advancing Personal Learning Using the Internet of Things ». Dans Securing the Internet of Things, 1733–49. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9866-4.ch082.

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Personal learning is a unique ability and requires self-determination to master. Personal learning also involves constructing representational learning artifacts that are used across life into work and society. Using avatars to foster identity within collaborative virtual environments (CVEs) can represent expressions of selfhood useful for participating in diverse communities. The Internet of Things (IoT) provides a spectrum of emerging technologies that can connect physical and virtual world activities resulting in new realms of human-computer abilities. Interconnected smart devices automate services and provide timely information resulting in safety, security, and efficiencies, especially for vulnerable populations such as persons with disabilities. The relationship is explored when IoT applications are combined with use of CVEs, avatars, and a discipline of presencing. Inclusivity becomes probable. Future research is described how individuals, organizations, and communities can be impacted by personal learning influenced by the inevitable growth of IoT and virtual learning.
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Actes de conférences sur le sujet "CVEMPs"

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Dlugaiczyk, Julia, Maximilian Habs et Marianne Dieterich. « Is it Menière’s disease or vestibular migraine ? cVEMPs make the difference ». Dans Abstract- und Posterband – 91. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Welche Qualität macht den Unterschied. © Georg Thieme Verlag KG, 2020. http://dx.doi.org/10.1055/s-0040-1711231.

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Dlugaiczyk, J., M. Habs et M. Dieterich. « Morbus MeniÖ¨re oder vestibuläre Migräne ? Auf die cVEMPs kommt es an ! » Dans Abstract- und Posterband – 91. Jahresversammlung der Deutschen Gesellschaft für HNO-Heilkunde, Kopf- und Hals-Chirurgie e.V., Bonn – Welche Qualität macht den Unterschied. © Georg Thieme Verlag KG, 2020. http://dx.doi.org/10.1055/s-0040-1711845.

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Lin, Shiyong, Yuan-Shin Lee et Roger J. Narayan. « Collaborative Haptic Interfaces and Distributed Control for Product Development and Virtual Prototyping ». Dans ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31214.

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In this paper, we propose a collaborative product development and virtual prototyping framework based on distributed haptic interfaces along with the deformable object modeling. Collaborative Virtual Environment (CVE) is a promising technique in industrial product development and virtual prototyping for globalized manufacturing enterprises. Network control problems such as network delay have greatly limited CVE’s application. The problem becomes more difficult when high-update-rate haptic interfaces and computation-demanding deformable objects are both integrated into CVEs for intuitive manipulation and enhanced realism. A hybrid network architecture is presented to balance the computational burden of haptic rendering and deformable object simulation. An adaptive artificial time compensation is used to reduce the time discrepancy between the server and the client. Interpolation and extrapolation approaches are used to synchronize graphic and haptic data transmitted over the network. The proposed techniques can be used for collaborative product virtual prototyping, virtual assembly, remote surgical simulation and other collaborative virtual environments where both haptic interfaces and deformable object models are involved.
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Meng, Jianhao, et Shih-Fu Chang. « CVEPS - a compressed video editing and parsing system ». Dans the fourth ACM international conference. New York, New York, USA : ACM Press, 1996. http://dx.doi.org/10.1145/244130.244145.

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Yang, Shilan, Huaimin Wang, Wei Li, Wei Liu et Xiang Fu. « CVEM ». Dans the 2018 International Conference. New York, New York, USA : ACM Press, 2018. http://dx.doi.org/10.1145/3291064.3291073.

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Silva, Cintia Ramalho Caetano da, Thiago Cortat Tavares, Ana Cristina Bicharra Garcia et José Luiz Thomasseli Nogueira. « Governo Eletrônico em Ambientes Colaborativos Virtuais ». Dans Simpósio Brasileiro de Sistemas de Informação. Sociedade Brasileira de Computação, 2009. http://dx.doi.org/10.5753/sbsi.2009.6171.

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Atualmente verifica-se um aumento crescente da popularidade dos CVE's (Collaborative Virtual Environment ou Ambientes Virtuais Colaborativos), e com isto diversas iniciativas de tem sido propostas por vários países na implantação de governo eletrônico dentro destes CVE's. Com base neste contexto, este artigo tem como objetivo o desenvolvimento de um espaço virtual para promover interação social, disseminação da informação e votação eletrônica, secreta e com voto único. O objetivo proposto é de verificar a viabilidade na transposição de instâncias de Governo Eletrônico aplicado sob o escopo de ambientes virtuais colaborativos. A instância de Governo Eletrônico abordado neste trabalho é o REUNI, novo decreto de Lei do Governo Federal que visa à reforma das Universidades Federais Brasileiras. O CVE escolhido para este trabalho foi o Second Life, um dos ambientes de realidade virtual amplamente difundido e utilizado em todo o mundo.
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Kuppa, Aditya, Lamine Aouad et Nhien-An Le-Khac. « Linking CVE’s to MITRE ATT&CK Techniques ». Dans ARES 2021 : The 16th International Conference on Availability, Reliability and Security. New York, NY, USA : ACM, 2021. http://dx.doi.org/10.1145/3465481.3465758.

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Redfern, Sam, et Niall Naughton. « Collaborative Virtual Environments to Support Communication and Community in Internet-Based Distance Education ». Dans 2002 Informing Science + IT Education Conference. Informing Science Institute, 2002. http://dx.doi.org/10.28945/2563.

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In this paper we discuss the use of modern information and communication technologies for distance education (DE) purposes. We argue that current technologies and implementations do not adequately support the key concepts of communication and community that many practitioners believe to be important, particularly if modern pedagogies such as constructivism are to be supported. We propose that collaborative virtual environments (CVEs) are appropriate tools for improving DE, and we discuss the current developments in the areas of CVEs in particular and in computer supported co-operative work (CSCW) in general. We also note those areas in which the majority of CVEs implemented to date have not reached their full potential for DE support, discuss current thought regarding online community, and outline a proposed CVE-based system for DE.
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Zhang, Xiaolong, et George W. Furnas. « Social interactions in multiscale CVEs ». Dans the 4th international conference. New York, New York, USA : ACM Press, 2002. http://dx.doi.org/10.1145/571878.571884.

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Otto, Oliver, Dave Roberts et Robin Wolff. « A review on effective closely-coupled collaboration using immersive CVE's ». Dans the 2006 ACM international conference. New York, New York, USA : ACM Press, 2006. http://dx.doi.org/10.1145/1128923.1128947.

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