scholarly journals Foliar δ13C Showed No Altitudinal Trend in an Arid Region and Atmospheric Pressure Exerted a Negative Effect on Plant δ13C

2017 ◽  
Vol 8 ◽  
Author(s):  
Zixun Chen ◽  
Guoan Wang ◽  
Yufu Jia
Keyword(s):  
Atmospheric Pressure ◽  
Arid Region ◽  
Foliar Δ13c ◽  
Negative Effect

Influence of Processing Parameters on Atmospheric Pressure Plasma Etching of Polyvinyl Alcohol Films

2011 ◽  
Vol 299-300 ◽  
pp. 608-611
Author(s):  
Shu Jing Peng ◽  
Yi Ping Qiu
Keyword(s):  
Atmospheric Pressure ◽  
Treatment Time ◽  
Etching Rate ◽  
Atmospheric Pressure Plasma ◽  
Processing Parameters ◽  
Moisture Regain ◽  
Force Microscopy ◽  
Pressure Plasma ◽  
Atomic Force ◽  
Negative Effect

This paper investigated the influence of various processing parameters of atmospheric pressure plasma jet (APPJ) on the etching behavior of PVA films. The etching rate increased as output power, and moisture regain increased. As the treatment time increased, the etching rate increased initially and then decreased. Atomic force microscopy (AFM) results showed that the surface roughness varied as the moisture regain (MR) (2.45%, 9.32%, and 78.31%, respectively) of PVA films changed during APPJ treatment. It was found that higher moisture regain and lower thermal conduction of underlayer had negative effect on the solubility of plasma treated PVA films.

scholarly journals Długoterminowe trendy widzialności oraz jej cechy charakterystyczne w wybranych regionach Polski

2019 ◽  
Vol 28 (4) ◽  
pp. 594-609
Author(s):  
Ewa Anioł ◽  
Grzegorz Majewski
Keyword(s):  
Wind Speed ◽  
Atmospheric Pressure ◽  
Precipitation Amount ◽  
Meteorological Conditions ◽  
North Central ◽  
The North ◽  
Number Of Factors ◽  
Negative Effect ◽  
Meteorological Elements ◽  
Pollution Concentrations

Air quality in Poland is determined by a large number of factors. The influence of atmospheric air and meteorological conditions on atmospheric visibility in Poland was examined. The article is based on statistical analysis of meteorological elements parameters (air temperature, relative humidity, precipitation amount, wind speed and direction, and atmospheric pressure) and air pollution concentrations (PM10, SO2, NO2) in 2004–2017. Data was provided from three Polish cities, located in the north, central and south Poland. It was shown that PM10 concentration was the most important parameter affecting visibility in all monitoring stations. Air pollutants NO2 and SO2 have a negative effect on visibility, but to a lesser extent than PM10. The influence of meteorological conditions on the effect of the air humidity on the deterioration of the visibility ratio and the stimulating effect of wind speed on the improvement of visibility conditions has been demonstrated.

scholarly journals Meteofactors and admittance of patients with atrial fibrillation for emergency medical care

2018 ◽  
Vol 18 (3) ◽  
pp. 64-68
Author(s):  
V A Belyayeva
Keyword(s):  
Atrial Fibrillation ◽  
Medical Care ◽  
Air Temperature ◽  
Atmospheric Pressure ◽  
Meteorological Parameters ◽  
Meteorological Factors ◽  
Weather Conditions ◽  
Emergency Medical Care ◽  
Emergency Medical ◽  
Negative Effect

This study presents the results of a retrospective analysis of the challenges of patients with atrial fibrillation (AF) for ambulance medical care depending on weather conditions and season. Aim. This study aimed to evaluate the effect of meteorological factors on addressing of patients with AF for emergency medical care in the context of seasonal dynamics. Materials. Archival cards of ambulance calls in the winter, spring, and summer 2012 and the corresponding databases of average daily meteorological parameters, day-to-day changes (∆), and pathogenicity indices were used: air temperature (it), atmospheric pressure (iр), humidity (ih), wind speed (iv), cloudiness (in), and general weather pathogenicity index (IWP). Results. In winter, the most significant negative effect is caused by fluctuations in meteo-factors: average daily air temperature and atmospheric pressure, it, ∆p, IWP; in spring were the average daily air temperature and atmospheric pressure, it, i∆t; in summer was i∆t. The response of the population to AF for medical care in the winter (6.7 ± 0.5 person/day) and spring (6.9 ± 0.4 person/day) is higher than that in summer (5.2 ± 0.5 person/day). Conclusion. The maximum number of correlation links between the frequency of ambulance medical care calls and meteorological factors is present in the winter and spring and has gender and season specifics. Seasonality factor affects the treatment of patients with AF for emergency medical care.

scholarly journals Transparent Polyaniline Thin Film Synthesized Using a Low-Voltage-Driven Atmospheric Pressure Plasma Reactor

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1278
Author(s):  
Jae Young Kim ◽  
Shahzad Iqbal ◽  
Hyo Jun Jang ◽  
Eun Young Jung ◽  
Gyu Tae Bae ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Polymerization ◽  
Low Voltage ◽  
Plasma Reactor ◽  
Chemical Properties ◽  
Atmospheric Pressure Plasma ◽  
Glass Tube ◽  
Degree Of Polymerization ◽  
Dielectric Barriers ◽  
Negative Effect

The use of low-voltage-driven plasma in atmospheric pressure (AP) plasma polymerization is considered as a simple approach to reducing the reactivity of the monomer fragments in order to prevent excessive cross-linking, which would have a negative effect on the structural properties of the polymerized thin films. In this study, AP-plasma polymerization can be processed at low voltage by an AP-plasma reactor with a wire electrode configuration. A bare tungsten wire is used as a powered electrode to initiate discharge in the plasma area (defined as the area between the wide glass tube and the substrate stand), thus allowing plasma polymerization to proceed at a lower voltage compared to other AP-plasma reactors with dielectric barriers. Thus, transparent polyaniline (PANI) films are successfully synthesized. The surface morphology, roughness, and film thickness of the PANI films are characterized by field emission scanning electron microscopy and atomic force microscopy. Thus, the surface of the polymerized film is shown to be homogenous, smooth, and flat, with a low surface roughness of 1 nm. In addition, the structure and chemical properties of the PANI films are investigated by Fourier transform infrared spectroscopy, thus revealing an improvement in the degree of polymerization, even though the process was performed at low voltage.

scholarly journals Construction Management Solutions to Mitigate Elevator Noise and Vibration of High-Rise Residential Buildings

2020 ◽  
Vol 12 (21) ◽  
pp. 8924
Author(s):  
Yangki Oh ◽  
Minwoo Kang ◽  
Kwangchae Lee ◽  
Sunkuk Kim
Keyword(s):  
Construction Management ◽  
Atmospheric Pressure ◽  
Noise Level ◽  
High Speed ◽  
Residential Buildings ◽  
Residential Area ◽  
Noise And Vibration ◽  
High Rise ◽  
Negative Effect ◽  
Design And Construction

In high-rise residential buildings (HRBs), elevators run at a high speed, which causes problems such as change of atmospheric pressure, noise, and vibration. Elevator noise and vibration (ENV) of HRBs causes both mental anxiety and a consistently negative effect for promoting a comfortable residential area. Therefore, a solution for alleviating the ENV of HRBs is essential. To date, studies related to ENV have been mostly conducted in the approach of mechanical and electric aspects. There have been few cases conducted from the perspective of construction management (CM), which integrates design and construction. Therefore, the aim of this study is to propose CM solutions to mitigate the ENV of HRB. For this study, the CM solution is presented after identifying the ENV problems of HRBs through documented research and case measurement. By measuring the noise of HRB that the solution was applied to, the noise level, especially in a range of >125 Hz, was extensively reduced. The result of this study will be used as sustainable guidelines that alleviate ENV problems in the process of design and construction of HRB elevators. It is expected that studies for improving ENV problems that occur in high-rise elevators will increase on the basis of the results of this study.

A High-Voltage Terminal for a Field-Emission Gun

1972 ◽  
Vol 30 ◽  
pp. 428-429
Author(s):  
N. F. Ziegler
Keyword(s):  
Field Emission ◽  
High Voltage ◽  
Atmospheric Pressure ◽  
Power Supplies ◽  
High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

Electron microscope characterization of MOCVD-grown gap layers on Si

1986 ◽  
Vol 44 ◽  
pp. 724-725
Author(s):  
K.M. Jones ◽  
M.M. Al-Jassim ◽  
J.M. Olson
Keyword(s):  
Atmospheric Pressure ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
Lattice Match ◽  
Si Substrates ◽  
Metal Organic ◽  
Good Lattice ◽  
Antiphase Domains

The epitaxial growth of III-V semiconductors on Si for integrated optoelectronic applications is currently of great interest. GaP, with a lattice constant close to that of Si, is an attractive buffer between Si and, for example, GaAsP. In spite of the good lattice match, the growth of device quality GaP on Si is not without difficulty. The formation of antiphase domains, the difficulty in cleaning the Si substrates prior to growth, and the poor layer morphology are some of the problems encountered. In this work, the structural perfection of GaP layers was investigated as a function of several process variables including growth rate and temperature, and Si substrate orientation. The GaP layers were grown in an atmospheric pressure metal organic chemical vapour deposition (MOCVD) system using trimethylgallium and phosphine in H2. The Si substrates orientations used were (100), 2° off (100) towards (110), (111) and (211).

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Social Motives Predict Loneliness During a Developmental Transition

2017 ◽  
Vol 76 (4) ◽  
pp. 145-153 ◽  
Author(s):  
Jana Nikitin ◽  
Alexandra M. Freund
Keyword(s):  
Social Relationships ◽  
Well Being ◽  
Social Avoidance ◽  
Social Approach ◽  
Social Motives ◽  
Developmental Transitions ◽  
Avoidance Motivation ◽  
Negative Effect ◽  
Low Levels

Abstract. Establishing new social relationships is important for mastering developmental transitions in young adulthood. In a 2-year longitudinal study with four measurement occasions (T1: n = 245, T2: n = 96, T3: n = 103, T4: n = 85), we investigated the role of social motives in college students’ mastery of the transition of moving out of the parental home, using loneliness as an indicator of poor adjustment to the transition. Students with strong social approach motivation reported stable and low levels of loneliness. In contrast, students with strong social avoidance motivation reported high levels of loneliness. However, this effect dissipated relatively quickly as most of the young adults adapted to the transition over a period of several weeks. The present study also provides evidence for an interaction between social approach and social avoidance motives: Social approach motives buffered the negative effect on social well-being of social avoidance motives. These results illustrate the importance of social approach and social avoidance motives and their interplay during developmental transitions.

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