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使用erd 2005更改管理员密码

黑客防线 2005年第10期 57-58页

作者： KINSON

也许是我经常抱着《黑客防线》一类的书籍学习的缘故．单位里的同事都把我当作高人。一般看待不管有什么问题或者系统出了什么故障，都会跑来要我帮忙。本着帮助别人就是巩固知识、提高自己的原则，我是来者不拒，尽全力而为之。这不，... 详细信息

也许是我经常抱着《黑客防线》一类的书籍学习的缘故．单位里的同事都把我当作高人。一般看待不管有什么问题或者系统出了什么故障，都会跑来要我帮忙。本着帮助别人就是巩固知识、提高自己的原则，我是来者不拒，尽全力而为之。这不，不管一个人多么聪明，记忆力再好，烦琐的事情一多，总会有忘记自己系统登录密码的可能。而一旦忘记了自己的系统登录密码，那种感觉叫作“心急如焚”。一有同事忘记了密码，

关键词：管理员密码 erd 系统登录密码更改《黑客防线》记忆力

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Characteristics of lithium thin films under deuterium ion implantation

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JOURNAL OF NUCLEAR MATERIALS 2003年 313卷 288-291页

作者： Furuyama, Y Ito, K Dohi, S Taniike, A Kitamura, A Kobe Univ Mercantile Marine Dept Nucl Engn Higashinada Ku Kobe Hyogo 6580022 Japan

To clarify characteristics of thin Li films as a plasma facing material, effect of modification of chemical composition of mum-thick deposited Li films introduced during the sample preparation and implantation with 1-keV deuterons on deuterium retention and thermal desorption properties is studied. Accelerator analysis has been employed to measure the thickness, the retention of D, H, O and C in the Li film, while thermal desorption spectroscopy has been utilized to investigate the chemical composition. The Li films exposed to moist atmosphere and subjected to D implantation show almost perfect isotope exchange from LiOH to LiOD. Carbon deposition during ion implantation is found to form a layer mixed with Li. With increasing the deposited amount of C, D-2 desorption behavior approaches that of pure C. (C) 2003 Elsevier Science B.V. All rights reserved.

关键词： Li thin films deuterium implanation thermal desorption spectroscopy RBS erd carbon deposition

来源： SCIE

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Electrophysiological, behavioral, and subjective indexes of workload when performing multiple tasks: manipulations of task difficulty and training

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INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY 1999年第2期31卷 129-145页

作者： Fournier, LR Wilson, GF Swain, CR Washington State Univ Dept Psychol Pullman WA 99164 USA USAF Res Lab Dayton OH USA Logicon Tech Serv Inc Dayton OH USA

This study examined whether alpha event-related desynchronization (erd) and theta event-related synchronization (ERS) could successfully measure changes in cognitive workload and training while an operator was engaged in a continuous, interactive, control task(s). Alpha 1 (8-10 Hz) erd, alpha 2 (10-12 Hz) erd, and theta (3-7 Hz) ERS were determined for a communications event that occurred during multiple task workload conditions or as a single task. Other measures (alpha and theta EEG power, heart rate, respiration, eye blinks, behavioral performance, and subjective workload ratings) were also evaluated. Results showed that alpha 2 EEG, heart rate, behavioral, and subjective measures were sensitive to changes in workload in the multiple tasks. In addition, eye blink rate and behavioral measures were sensitive to training. Alpha erd and theta ERS were not sensitive to workload and training in our interactive, multiple task environment. However, they we re effective indexes of cognitive/behavioral demands within an interactive single task. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： EEG erd ERS EGG alpha work load theta training

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Emotion and Brain Oscillations: High Arousal is Associated with Decreases in Alpha- and Lower Beta-Band Power

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CEREBRAL CORTEX 2021年第3期31卷 1597-1608页

作者： Schubring, David Schupp, Harald T. Univ Konstanz Dept Psychol Constance Germany

The study of brain oscillations associated with emotional picture processing has revealed conflicting findings. Although many studies observed a decrease in power in the alpha- and lower beta band, some studies observed an increase. Accordingly, the main aim of the present research series was to further elucidate whether emotional stimulus processing is related to an increase or decrease in alpha/beta power. In Study 1, participants (N= 16) viewed briefly presented (150 ms) high-arousing erotic and low-arousing people pictures. Picture presentation included a passive viewing condition and an active picture categorization task. Study 2 (N= 16) replicated Study 1 with negative valence stimuli (mutilations). In Study 3 (N = 18), stimulus materials of Study 1 and 2 were used. The main finding is that high-arousing pictures (erotica and mutilations) are associated with a decrease of power in the alpha/beta band across studies and task conditions. The effect peaked in occipitoparietal sensors between 400 and 800 ms after stimulus onset. Furthermore, a late (>1000 ms) alpha/beta power increase to mutilation pictures was observed, possibly reflecting top-down inhibitory control processes. Overall, these findings suggest that brain oscillations in the alpha/beta-band may serve as a useful measure of emotional stimulus processing.

关键词： attention arousal EEG emotion erd

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Exploring the Visual Guidance of Motor Imagery in Sustainable Brain-Computer Interfaces

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SUSTAINABILITY 2022年第21期14卷 13844-13844页

作者： Yang, Cheng Kong, Lei Zhang, Zhichao Tao, Ye Chen, Xiaoyu Zhejiang Univ City Coll Dept Ind Design Hangzhou 310015 Peoples R China Zhejiang Univ Coll Comp Sci & Technol Dept Ind Design Hangzhou 310027 Peoples R China

Motor imagery brain-computer interface (MI-BCI) systems hold the possibility of restoring motor function and also offer the possibility of sustainable autonomous living for individuals with various motor and sensory impairments. When utilizing the MI-BCI, the user's performance impacts the system's overall accuracy, and concentrating on the user's mental load enables a better evaluation of the system's overall performance. The impacts of various levels of abstraction on visual guidance of mental training in motor imagery (MI) may be comprehended. We proposed hypotheses about the effects of visually guided abstraction on brain activity, mental load, and MI-BCI performance, then used the event-related desynchronization (erd) value to measure the user's brain activity, extracted the brain power spectral density (PSD) to measure the brain load, and finally classified the left- and right-handed MI through a support vector machine (SVM) classifier. The results showed that visual guidance with a low level of abstraction could help users to achieve the highest brain activity and the lowest mental load, and the highest accuracy rate of MI classification was 97.14%. The findings imply that to improve brain-computer interaction and enable those less capable to regain their mobility, visual guidance with a low level of abstraction should be employed when training brain-computer interface users. We anticipate that the results of this study will have considerable implications for human-computer interaction research in BCI.

关键词： sustainable living EEG motor imagery visual guidance mental load erd

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Detecting traces of consciousness in the process of intending to act

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EXPERIMENTAL BRAIN RESEARCH 2016年第7期234卷 1945-1956页

作者： Verbaarschot, Ceci Haselager, Pim Farquhar, Jason Radboud Univ Nijmegen Donders Inst Brain Cognit & Behav Ctr Cognit POB 9104 NL-6500 HE Nijmegen Netherlands

An intention to act has different onsets when it is measured in different ways. When participants provide a self-initiated report on the onset of their awareness of intending to act, the report occurs around 150 ms prior to action. However, when the same participants are repeatedly asked about their awareness of intending at different points in time, the onset of intending is found up to 2 s prior to action. This 'probed' awareness has its onset around the same time as the brain starts preparing the act, as measured using EEG. First of all, this undermines straightforward interpretations about the temporal relation between unconscious brain states and conscious intentions and actions. Secondly, we suggest that these results present a problem for the view that intentions are mental states occurring at a single point in time. Instead, we suggest the results to support the interpretation of an intention to act as a multistage process developing over time. This process of intending seems to develop during the process of acting, leaving reportable traces in consciousness at certain points along the road.

关键词： Action EEG erd Intention LRP RP

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Primary somatosensory cortex sensitivity may increase upon completion of a motor task

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NEUROSCIENCE LETTERS 2023年第1期801卷 137160页

作者： Ohba, Hideo Nakagawa, Kei Iida, Koji Yuge, Louis Hiroshima Univ Grad Sch Biomed & Hlth Sci Dept Neurosurg Kasumi 1-2-3 Minami Ku Hiroshima 7348553 Japan Itsukaichi Mem Hosp Dept Neurosurg Seifu Hlth Care Grp Kurashige 1-95 Saeki Ku Hiroshima 7315156 Japan Hiroshima Univ Grad Sch Biomed & Hlth Sci Div Bioenvironm Adaptat Sci Kasumi 1-2-3 Minami Ku Hiroshima 7348553 Japan

Objectives: The electroencephalogram and magnetic field primary somatosensory cortex (S1)-derived components are attenuated before and during motor tasks compared to the resting state, a phenomenon called gating;however, the S1 response after a motor task has not been well studied. We aimed to investigate sensory infor-mation processing immediately after motor tasks using *** and methods: We investigated sensory information processing immediately after finger movement using magnetoencephalography in 14 healthy adults. Volunteers performed a simple reaction task where they were required to press a button when they received a cue. In parallel, electrical stimulation to the right index finger was applied at regular intervals to detect the magnetic brain field changes. The end of the motor task timing was defined using the event-related synchronization (ERS) appearance latency in the brain magnetic field's beta band around the primary motor cortex. The ERS appearance latency and the sensory stimuli timing applied every 500 ms were synchronized over the experimental system timeline. We examined whether there was a difference in the S1 somatosensory evoked field responses between the ERS emergence and ERS disappearance phase, focusing on the N20m-P35m peak-to-peak amplitude (N20m-P35m amplitude) value. A control experiment was also conducted in which only sensory stimulation was applied with no motor ***: The N20m-P35m mean amplitude value was significantly higher in the ERS emergence phase (15.81 nAm;standard deviation [SD], 6.54 nAm) than in the ERS disappearance phase (13.54 nAm;SD, 5.12 nAm) (p < 0.05) and the control (12.08 nAm, SD 5.61 nAm) (p = 0.013). No statistically significant differences were identified between the ERS disappearance phase and the control (p = 0.281).Conclusions: The S1 sensitivity may increase rapidly after exiting from the gating influence in S1 (after completing a motor task).

关键词： Magnetoencephalography Sensory gating erd ERS Primary somatosensory cortex Primary motor cortex

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First measurements with the Madrid 5 MV tandem accelerator

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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 2004年 219卷 400-404页

作者： Climent-Font, A Pászti, F García, G Fernández-Jiménez, MT Agulló, F Univ Autonoma Madrid CMAM E-28049 Madrid Spain Univ Autonoma Madrid Dept Fis Aplicada E-28049 Madrid Spain Univ Autonoma Madrid Dept Mat E-28049 Madrid Spain

The 5 MV Cockcroft-Walton tandem accelerator from HVEE recently installed at the Center for Micro-Analysis of Materials on the Campus of the University Autonoma of Madrid is in operation since September 2002. The machine is mainly dedicated to ion beam analysis. In this work, we report on the first measurements performed. They include calibration of the terminal voltage using p-gamma reactions and elastic alpha-alpha resonances on C, O, N, Al and Si. RBS and erd measurements using He and Si beams are now routinely performed. Samples of different nature including, among others, SiN, SiON, and porous Al2O3, were also characterized. (C) 2004 Elsevier B.V. All rights reserved.

关键词： ion accelerators IBA RBS erd porous Al2O3 SiON

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erd measurement of D–H replacement in D-implanted oxide ceramics exposed to H2O vapor at room temperature

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Nuclear Instruments & Methods in Physics Research Section B 2006年第1期249卷 322-325页

作者： Morita, Kenji kmorita@ccmfs.meijo-u.ac.jp Tsuchiya, Bun Nagata, Shinji Katahira, Koji Department of General Education School of Science and Technology Meijo University 1-501 Shiogamaguchi Tenpaku-ku Nagoya 468-8502 Japan Institute for Materials Research Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan Advance Research Institute TYK Co. Ltd. 3-1 Ohata-cho Tajimi 507-8607 Japan

Abstract: The speed of D–H replacement in D-implanted BaCe1−X Y X O3−δ and SrCe1−X Yb X O3−δ , exposed to H2O vapor at room temperature has been studied as a function of X by use of the erd technique with MeV He+ ion beam. The decay curve of D and growth curve of H in the specimens have been measured as a function of exposure time, and the decay constants of D, namely the D–H replacement speeds, have been obtained from the experimental curves. It is found for both specimens that the decay constants of D, proportional to the absorption coefficient and the molecular formation coefficient of HD, increases and then after a maximum at X =0.05–0.10 decreases as X increases and the absolute experimental values for BaCe1−X Y X O3−δ are larger by an order of magnitude than those of SrCe1−X Yb X O3−δ . [Copyright &y& Elsevier]

关键词： erd Hydrogen Oxide ceramics

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Continuous detection of the self-initiated walking pre-movement state from EEG correlates without session-to-session recalibration

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JOURNAL OF NEURAL ENGINEERING 2015年第3期12卷 036007页

作者： Ioana Sburlea, Andreea Montesano, Luis Minguez, Javier Bit&Brain Technol SL Zaragoza 50018 Spain Univ Zaragoza Inst Invest Engn Aragon I3A Zaragoza 50018 Spain

Objective. Brain-computer interfaces (BCI) as a rehabilitation tool have been used to restore functions in patients with motor impairments by actively involving the central nervous system and triggering prosthetic devices according to the detected pre-movement state. However, since EEG signals are highly variable between subjects and recording sessions, typically a BCI is calibrated at the beginning of each session. This process is inconvenient especially for patients suffering locomotor disabilities in maintaining a bipedal position for a longer time. This paper presents a continuous EEG decoder of a pre-movement state in self-initiated walking and the usage of this decoder from session to session without recalibrating. Approach. Ten healthy subjects performed a self-initiated walking task during three sessions, with an intersession interval of one week. The implementation of our continuous decoder is based on the combination of movement-related cortical potential (MRCP) and event-related desynchronization (erd) features with sparse classification models. Main results. During intrasession our technique detects the pre-movement state with 70% accuracy. Moreover this decoder can be applied from session to session without recalibration, with a decrease in performance of about 4% on a one- or two-week intersession interval. Significance. Our detection model operates in a continuous manner, which makes it a straightforward asset for rehabilitation scenarios. By using both temporal and spectral information we attained higher detection rates than the ones obtained with the MRCP and erd detection models, both during the intrasession and intersession conditions.

关键词： BCI motor intention rehabilitation session-to-session transfer MRCP erd

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