Methods and preliminary measurement results of liquid Li wettability

Compact roofs are normally built without organic materials between the vapour barrier and the roof membrane due to moisture safety risks. However, laboratory measurements indicate that organic materials could be used provided that a smart vapour barrier (SVB) is applied at the warm face of the roof construction. The aim of this study is to investigate the moisture and temperature conditions in three full-scale flat compact wooden roofs with SVB. The roofs are part of two pilot projects located in Longyearbyen, Svalbard and Malvik, Norway. The paper presents the two projects including the premises for construction of the roofs and provides preliminary measurement results. The roofs are instrumented to measure moisture content and temperature in the wooden roof beams. The initial results from Longyearbyen show that the moisture content in the wooden beams is low and indicate that compact wooden roofs with SVB may be a solution with acceptable moisture risk in the arctic climate. The initial results from Malvik show that there might be a risk of mould growth in the roof as the built-in moisture in the wooden beams was up to 24 weight-%. In both projects, the moisture content in the beams in general was higher close to the roof underlay than close to the SVB.

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Context-Based Dynamic Meshed Backhaul Construction for 5G Heterogeneous Networks

10.20944/preprints201809.0056.v1 ◽

2018 ◽

Author(s):

Gia Khanh Tran ◽

Ricardo Santos ◽

Hiroaki Ogawa ◽

Makoto Nakamura ◽

Kei Sakaguchi ◽

...

Keyword(s):

Base Stations ◽

Preliminary Measurement ◽

Efficient Operation ◽

Traffic Distribution ◽

Measurement Results ◽

Novel Method ◽

Reduce Energy Consumption ◽

Cost Efficient ◽

Cell Base ◽

Dynamic Formation

5G heterogeneous network overlaid by millimeter-wave (mmWave) access employs mmWave meshed backhauling as a promising cost-efficient backhaul architecture. Due to the nature of mobile traffic distribution in practice which is both time-variant and spatially non-uniform, dynamic construction of mmWave meshed backhaul is prerequisite to support the varying traffic distribution. Focusing on such scenario of outdoor dynamic crowd (ODC), this paper proposes a novel method to control mmWave meshed backhaul for efficient operation of mmWave overlay 5G HetNet through Software-Defined Network (SDN) technology. Our algorithm is featured by two functionalities, i.e., backhauling route multiplexing for overloaded mmWave small cell base stations (SC-BSs) and mmWave SC-BSs’ ON/OFF status switching for underloaded spot. In this paper, the effectiveness of the proposed meshed network is confirmed by both numerical analyses and experimental results. Simulations are conducted over a practical user distribution modeled from measured data in realistic environments. Numerical results show that the proposed algorithm can cope with the locally intensive traffic and reduce energy consumption. Furthermore, a WiGig (Wireless Gigabit Alliance certified) device based testbed is developed for Proof-of-Concept (PoC) and preliminary measurement results confirm the proposed dynamic formation of the meshed network’s efficiency.

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Preliminary results of EURAMET Rockwell comparison between INRiM and UME (EURAMET.M.H-S1.A.B.C)

ACTA IMEKO ◽

10.21014/acta_imeko.v9i5.980 ◽

2020 ◽

Vol 9 (5) ◽

pp. 256

Author(s):

C. Kuzu ◽

A. Germak ◽

C. Origlia ◽

E. Pelit

Keyword(s):

National Metrology Institute ◽

Rockwell Hardness ◽

Preliminary Measurement ◽

Preliminary Results ◽

Measurement Results

A bilateral supplementary comparison between INRiM (National Metrology Institute of Italy) and UME (National Metrology Institute of Turkey) had been decided to be organized in the field of Hardness Metrology to determine the consistency of the national hardness standards in both countries realizing Rockwell Hardness measurements in accordance with ISO 6508-1:2016 and ISO 6508-3:2015 standards. In this paper the procedure and preliminary measurement results of the bilateral EURAMET supplementary comparison between the two laboratories are explained.

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Context-Based Dynamic Meshed Backhaul Construction for 5G Heterogeneous Networks

Journal of Sensor and Actuator Networks ◽

10.3390/jsan7040043 ◽

2018 ◽

Vol 7 (4) ◽

pp. 43 ◽

Cited By ~ 6

Author(s):

Gia Tran ◽

Ricardo Santos ◽

Hiroaki Ogawa ◽

Makoto Nakamura ◽

Kei Sakaguchi ◽

...

Keyword(s):

Base Stations ◽

Preliminary Measurement ◽

Efficient Operation ◽

Traffic Distribution ◽

Measurement Results ◽

Novel Method ◽

Reduce Energy Consumption ◽

Cost Efficient ◽

Cell Base ◽

Dynamic Formation

Five-G heterogeneous network overlaid by millimeter-wave (mmWave) access employs mmWave meshed backhauling as a promising cost-efficient backhaul architecture. Due to the nature of mobile traffic distribution in practice which is both time-variant and spatially non-uniform, dynamic construction of mmWave meshed backhaul is a prerequisite to support the varying traffic distribution. Focusing on such scenario of outdoor dynamic crowd (ODC), this paper proposes a novel method to control mmWave meshed backhaul for efficient operation of mmWave overlay 5G HetNet through Software-Defined Network (SDN) technology. Our algorithm is featured by two functionalities, i.e., backhauling route multiplexing for overloaded mmWave small cell base stations (SC-BSs) and mmWave SC-BSs’ ON/OFF status switching for underloaded spot. In this paper, the effectiveness of the proposed meshed network is confirmed by both numerical analyses and experimental results. Simulations are conducted over a practical user distribution modeled from measured data in realistic environments. Numerical results show that the proposed algorithm can cope with the locally intensive traffic and reduce energy consumption. Furthermore, a WiGig (Wireless Gigabit Alliance certified) device based testbed is developed for Proof-of-Concept (PoC) and preliminary measurement results confirm the proposed dynamic formation of the meshed network’s efficiency.

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The Influence of Pulsating Tensile Stress on Residual Magnetic Field of P91 Steel Samples

Advances in Materials Science ◽

10.2478/adms-2019-0012 ◽

2019 ◽

Vol 19 (2) ◽

pp. 72-82

Author(s):

A. Złocki ◽

M. Roskosz ◽

J. Kwaśniewski

Keyword(s):

Magnetic Field ◽

Load Cycle ◽

Tangential Component ◽

Preliminary Measurement ◽

P91 Steel ◽

Variability Pattern ◽

Measurement Results ◽

Residual Magnetic Field ◽

Flux Gate ◽

Stress Variations

ABSTRACTMeasurements of Residual Magnetic Field RMF (the tangential component parallel to the load direction) were taken on the surface of P91 steel plate samples (X10CrMoVNb9-1) subjected to periodic pulsating tensile cyclic loads with the use of flux-gate and magneto impedance sensors, and preliminary measurement results are compiled and analyzed. The study investigates how the microstructure and load cycle parameters affect the RMF changes due to stress variations. Each combination of parameters: microstructure and load cycle corresponds to the characteristic variability pattern of magnetization and its maximum and minimum values.

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Ultraviolet-induced fluorescence of lubricate oils

Combustion Engines ◽

10.19206/ce-116853 ◽

2015 ◽

Vol 163 (4) ◽

pp. 21-25

Author(s):

Emilia BASZANOWSKA ◽

Zbigniew OTREMBA

Keyword(s):

Optical Fiber ◽

Oil Quality ◽

Optical Fiber Sensor ◽

Emission Spectra ◽

The Other ◽

Fiber Sensor ◽

Fluorescence Measurement ◽

Fiber System ◽

Preliminary Measurement ◽

Measurement Results

The paper describes the study on relationship between the engine lubricate oil quality and fluorescence phenomenon. In order to determine the Excitation-Emission spectra (EEMs) of oil samples, a spectrofluorometer combined with an optical fiber system were applied. Two methods of fluorescence measurement: when oil diluted in non-fluorescent solvent (n-hexane) is placed in the quartz-cuvette inside the spectrofluorometer, and when oil sample is placed outside the spectrofluorometer (then EEMs is measured through the optical fiber sensor) were utilized to analyze the shape of EEMs of lubricate oil. Moreover in the second case of measurement, the optical fiber sensor was placed at an angle of 45 degrees to the oil surface, similarly above the oil surface and beneath the oil surface directly submerged in oil. Preliminary measurement results presented in this paper – on one hand – indicate diversity in the shape of EEMs depending on the method of fluorescence measurement, on the other hand – indicate possibility to measure fluorescence of oil directly in engine lubricate oil circuit.

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Alkali Vapor MEMS Cells Technology toward High-Vacuum Self-Pumping MEMS Cell for Atomic Spectroscopy

Micromachines ◽

10.3390/mi9080405 ◽

2018 ◽

Vol 9 (8) ◽

pp. 405 ◽

Cited By ~ 4

Author(s):

Pawel Knapkiewicz

Keyword(s):

Cold Atoms ◽

High Vacuum ◽

Atomic Clock ◽

Atomic Spectroscopy ◽

Anodic Bonding ◽

Buffer Gas ◽

Optical Mems ◽

Preliminary Measurement ◽

Gas Atmosphere ◽

Measurement Results

The high-vacuum self-pumping MEMS cell for atomic spectroscopy presented here is the result of the technological achievements of the author and the research group in which he works. A high-temperature anodic bonding process in vacuum or buffer gas atmosphere and the influence of the process on the inner gas composition inside a MEMS structure were studied. A laser-induced alkali vapor introduction method from solid-state pill-like dispenser is presented as well. The technologies mentioned above are groundbreaking achievements that have allowed the building of the first European miniature atomic clock, and they are the basis for other solutions, including high-vacuum optical MEMS. Following description of the key technologies, high-vacuum self-pumping MEMS cell construction and preliminary measurement results are reported. This unique solution makes it possible to achieve a 10−6 Torr vacuum level inside the cell in the presence of saturated rubidium vapor, paving the way to building a new class of optical reference cells for atomic spectroscopy. Because the level of vacuum is high enough, experiments with cold atoms are potentially feasible.

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