Nahrávání probehlo na nekolika místech Moravy a byly pri nem zaznamenány predevsím slovenské písne. Prepisy textu ve druhém svazku jsou pripojeny proto, ze texty mohou být pro velkou cást uzivatelu ...nesrozumitelné. K údaji o vyuzívání celostopého záznamu pouze v profesionálních studiích muzeme dodat, ze i na brnenském akademickém pracovisti se v terénu porizovaly od roku 1964 výhradne celostopé záznamy lidových písní hudby na profesionálním magnetofonu firmy Kudelski Nagra III B. Ve druhém svazku nejsou prepsány nekteré komentáre k písním, i kdyz se na ne v textu upozornuje.
This paper discusses energy efficient ADC design with low voltage operation. In SAR ADCs, the energy consumption stays constant in the S&H circuit and increases in the comparator with supply voltage, ...V DD . However, the energy consumed by the logic gates can be reduced using low V DD . Thus, the optimum V DD which minimizes the total energy consumption in SAR ADCs can be found. In flash ADCs, the ENOB is mainly determined by mismatch voltages of the comparators and the energy consumption can be reduced by using lower V DD ; however, it also reduces conversion frequency. Thus, we proposed FoM delay product (FD product) that offers the balance between the energy consumption and conversion speed. The optimum V DD that minimizes FD product can be found. A 0.5 V 5-bit 600 MSps flash ADC has been developed and demonstrated the usefulness of reducing V DD to decrease the energy consumption without serious degradation of the performance.
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•Activated carbons (ACs) were synthesized from DVDs and CDs wastes as precursor.•CNTs coated on the surface of the as-prepared ACs from CDs and DVDs.•The CNTs/CDsAC and CNTs/DVDsAC ...adsorbents were tested for the adsorption of AO7.•Influential parameters, kinetics, equilibrium and reusability were studied.
The purpose of the present work was to prepare activated carbon (AC) from low-cost wastes, such as digital versatile discs (DVDs) and compact discs (CDs), coated with carbon nanotubes (CNTs) for adsorption of Acid Orange 7 (AO7) from dye-containing solutions. The surface morphology of the activated carbons from DVDs (DVDsAC), CDs (CDsAC), CNTs, CNTs/DVDsAC and CNTs/CDsAC was determined by XRD and SEM techniques. SEM micrographs of adsorbents clearly show a heterogeneous porous surface with irregular pores in the structure of the activated carbons. Results showed that CNTs/DVDsAC (30.3mg/g) and CNTs/CDsAC (32.8mg/g), in comparison with DVDsAC (15.1mg/g) and CDsAC (9.9mg/g), were more efficient adsorbents for the adsorption of AO7. The dye adsorption amount (qe) increases with a reduction in the solution pH, adsorbent dosage and an increase in the initial concentration of AO7 for these two more efficient adsorbents. Pseudo-second order model and Langmuir isotherm fitted with the experimental data. The spontaneous and endothermic processes were analyzed by the thermodynamic studies for the adsorption of AO7. The negative values of ΔG, and the positive values of ΔH and ΔS parameters indicate that the adsorption of AO7 onto CNTs/CDsAC and CNTs/DVDsAC was spontaneous and endothermic, respectively.
•We fabricate a humidity sensor with laser-scribed graphene electrode and graphite oxide sensing layer.•The fabrication process is done by a low power (5 mW) DVD drive.•The LSG-GO humidity sensor ...operates in the relative humidity (RH) range of 19 %–97.4 %.•The LSG based humidity sensor demonstrates high sensitivity (4770.14 pF/% RH).•Excellent sensing stability for more than 30 days has been demonstrated.
Monitoring the environmental humidity are of great significance to human comfort and product quality in many fields. However, high performance humidity sensors are difficult to be widely used because of their cost and complex preparation process. It is also highly desirable to develop a facile fabrication method that is capable of producing humidity sensors of customized size, shape, and geometry. Here, using a low power DVD drive, we successfully fabricate a highly sensitivity and low-cost humidity sensor, consisting of laser-scribed graphene (LSG) electrode and graphite oxide (GO) sensing layer. The LSG-GO humidity sensor operates in the relative humidity (RH) range of 19 %–97.4 %, demonstrating high sensitivity (4770.14 pF/% RH), quick response/recovery, and excellent sensing stability. In addition, the possible humidity sensing mechanism is discussed with the help of impedance spectroscopy. These results indicate that the LSG/GO sensor, enabled by the facile fabrication process with low power DVD drives, demonstrates promising potential with broad application prospects.
First proposed in 1970, intracavity absorption spectroscopy (ICAS) has developed into a powerful diagnostics technique. This talk will focus on recent ICAS applications to combustion diagnostics and ...sketch promising future developments.
Abstract
Introduction:
Recently we attempted an ECG recording in intact freely-behaving mice by using a plate sensor that has multiple (15) gold-plated electrodes, on which mice can walk around ...freely, without the use of tether or telemetry system. Although the electrodes are a kind of dry electrode, we found that the ECG plate sensor detects ECG from mouse’s footpads during sleep or even during wake-sleep transition probably because of the sweating from their footpads.
Methods:
A mouse cage, in which the ECG plate sensor was mounted, was placed in a Faraday cage. Fifteen ECG signals of the ECG plate sensor were fed to a PC via a 15-channel amplifier and a 16-channel A/D converter with using Clampex7 (Axon Instruments) signal acquisition software. Mouse behavior was also recorded by a DVD recorder. Intact, wild-type C57BL/6J mice were simply put on the ECG plate sensor for the recording for about 2 hours.
Results:
Although the ECG plate sensor could not detect ECG most of the period during active state, ECG signal appeared relatively stably during sleep state from 10 out of 12 mice examined; two mice did not fall asleep within 2 hours. The ECG appearance during sleep continued for a maximum of ~15 minutes and disappeared when they awoke. One mouse allowed us to record ECG from the period before sleep onset that appeared to be quiet waking state based on the images stored in the DVD recorder.
Conclusion:
The physiological role of the sweating during sleep in mice is inexplicable because most of mammals including mice have eccrine sweat glands that are considered to be activated by sympathetic nerve activity in response to emotional stressors, to which mice would not exposed during sleep. Nonetheless, the finding of the sweating during sleep in mice that enables noninvasive ECG recording may provide us a new tool to investigate cardiac and autonomic nervous system activities during sleep and wake-sleep transition states.
Support (If Any):
This work was supported by a JSPS KAKENHI Grant, Number 24590268, Tokyo, Japan.
Autonomous driving, unmanned aerial vehicles (UAVs), and various other vehicular navigation schemes heavily depend on the accurate position, velocity, and timing (PVT) information offered by global ...navigation satellite systems (GNSSs). Meanwhile, GNSS security is challenged by spoofing attacks that aim to deceive users by inducing false PVT solutions. Therefore, detecting these attacks on time is vital for vehicular navigation security. Spoofing attacks involve transmitting counterfeit signals from spoofers instead of authentic satellites, making it difficult to coordinate spatial information accurately. To this end, the Doppler shift, revealing spatial features between transmitters and receivers, is regarded as an effective metric for spoofing detection. Especially for vehicles, due to their motion relative to the spoofer, Doppler bias is appended to the raw measurement, providing an observable spoofing signature. Conventional approaches tend to directly monitor the Doppler bias but require complex requirements like static initialization, random motion, and multiple receivers. Moreover, the commonly utilized single-antenna assumption renders them ineffective against multi-antenna spoofing attacks. This paper proposes a new approach that indirectly exploits the Doppler bias by examining its adverse impact on velocity consistency. The introduced direct velocity determination (DVD) method calculates velocity directly from the Doppler measurements, which is then utilized for consistency-checking alongside the velocity obtained from the conventional pseudorange-aided approach. We thoroughly investigate the impact of Doppler bias on velocities and analyze their consistency across different scenarios. Field tests validate the effectiveness of the proposed method, surpassing previous Doppler-based methods and the widely used receiver autonomous integrity monitoring (RAIM) method.
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