Realization of fully distributed RC networks using thick film technology

The problems associated with the fabrication of Fully Distributed RC (FDRC) networks using thick film techniques have been discussed. Also, a comprehensive investigation into the fabrication of fully distributed RC networks has been carried out in which a series of resistor-dielectric ink combinations were examined for compatibility. The investigations resulted in the successful fabrication of thick film FDRC devices. It must be mentioned, however, that the conventional methods of trimming could not be used in view of the fact that the first resistor layer of the FDRC network is completely covered with a layer of dielectric and that the physical shape and size of the distributed network should not be changed by trimming. The high voltage pulse trimming technique was therefore examined in detail since it neither required accessibility to the surface of the resistor nor did it change the physical shape of the resistors. A suitable electronic circuit was designed for this purpose and was used to adjust the values of several fully distributed RC components. The manufactured thick film FDRC devices was examined in various electronic networks such as multivibrators, phase shift oscillators and active filters with successful results

Profiling procedures. 1: Anodic oxidation. 2: OLS profile program

Instructions for use of anodic oxidation apparatus in conjunction with computer program to obtain electrically active concentration profiles of doped silicon wafer

Situating Language in the Real-World: The Role of Multimodal Iconicity and Indexicality

In the last decade, a growing body of work has convincingly demonstrated that languages embed a certain degree of non-arbitrariness (mostly in the form of iconicity, namely the presence of imagistic links between linguistic form and meaning). Most of this previous work has been limited to assessing the degree (and role) of non-arbitrariness in the speech (for spoken languages) or manual components of signs (for sign languages). When approached in this way, non-arbitrariness is acknowledged but still considered to have little presence and purpose, showing a diachronic movement towards more arbitrary forms. However, this perspective is limited as it does not take into account the situated nature of language use in face-to-face interactions, where language comprises categorical components of speech and signs, but also multimodal cues such as prosody, gestures, eye gaze etc. We review work concerning the role of context-dependent iconic and indexical cues in language acquisition and processing to demonstrate the pervasiveness of non-arbitrary multimodal cues in language use and we discuss their function. We then move to argue that the online omnipresence of multimodal non-arbitrary cues supports children and adults in dynamically developing situational models

Delay-Reliability Trade-off in MIMO-Enabled IEEE 802.11-Based Wireless Sensor and Actuator Networks

AbstractOne of the main challenges in Wireless Sensor and Actuator Networks (WSAN) is the delay caused by shared and nondeterministic behavior of wireless communication medium. The Retry-Limit parameter of IEEE 802.11 standard can be used to control packet reliability, whereas other parameters mostly effect on the packet delay. In this paper, at first the delay-reliability trade-off in WSANs based on MIMO-Enabled IEEE 802.11 standard, utilizing Enhanced Distributed Channel Access (EDCA) at Medium Access Control (MAC) layer and Maximum Likelihood Spatial Multiplexing at PHYsical (PHY) Layer is studied. Then two simple adaptive schemes have been proposed to minimize packet delay while satisfying the required reliability at noisy factory environment

Microfabricated high-finesse optical cavity with open access and small volume

We present a microfabricated optical cavity, which combines a very small mode volume with high finesse. In contrast to other micro-resonators, such as microspheres, the structure we have built gives atoms and molecules direct access to the high-intensity part of the field mode, enabling them to interact strongly with photons in the cavity for the purposes of detection and quantum-coherent manipulation. Light couples directly in and out of the resonator through an optical fiber, avoiding the need for sensitive coupling optics. This renders the cavity particularly attractive as a component of a lab-on-a-chip, and as a node in a quantum network

Numerical Modeling of Sediment Transport in a Typical Large Reservoir with Respect to Meander Effects on Sediment Flow Path

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Effects of Current on Arc Fabrication of Cu Nanoparticles

Arc-fabricated copper nanoparticles (Cu Nps) size, morphology and the crystalline structure, as well as the yields of Nps appear sensitive to the applied currents (50–160 A) in distilled water. The results indicate that the sizes of Cu Nps are directly proportional to the currents employed. At 50 A, TEM, XRD, and SEM analyses show fabrication of relatively purest, the most dispersed, face-centered cubic (fcc) brown Cu Nps with rather smallest average size of 20 nm. At the same current, the TGA-DTA analysis reveals neither weight loss nor gain, indicating thermal stability of the fabricated Cu Nps