Search results for "Humidity"

Visibility forecast in the phase of pre-condensation

1969

The effect on visibility of the swelling of aerosol particles due to increasing humidity is studied. The swelling can be described by r(f)/r (0) = (1 - f ) ?1/? where r ( f ) = particle radius at relative humidity f and ? = const ? 4 on the average. The visibility variation is expressed as V(f)/V(f 0 ) = [(1 - f )/(1 - f 0 )] V * ? 1)/? where V * = exponent of the aerosol size distribution ? 3 on the average. The last formula allows to compute the standard visual range V(f) at relative humidity f from the present standard visual range V(f 0 ) at present relative humidity f 0 . DOI: 10.1111/j.2153-3490.1969.tb00469.x

Sol-gel produced humidity sensor

1993

Abstract The sol-gel produced polycrystalline Prussian Blue thick films as planar humidity sensors have been investigated by impedance spectroscopy. The equivalent circuit used allows simulation in all the investigated r.h. range (10–100%). The region of changes of sample resistance is about five orders, which is enough for high measuring sensitivity.

Selective quantification of humidity and ammonia by optical excitation of molecular semiconductor-doped insulator (MSDI) sensors

2015

MSDI (molecular semiconductor-doped insulator) ammonia sensors have been investigated using cyclic optical excitation as multi-signal generation method. This method enables a selective quantification of both humidity in the range of 30–70 %rh and ammonia concentration in the range of 0–30 ppm with a single sensor at room temperature.

Meridional gradients of light absorbing carbon over northern Europe

2008

In situ measurements have been made in the upper troposphere of the properties of particles containing light absorbing carbon (LAC). These measurements, made in late November 2006 over northern Europe, show that the average LAC mass concentration varies between 1 and 5 ng m−3 over a latitude range 50° to 70°N, with maxima at 50° and 66°. The relative fraction of all particles larger than 0.1 µm that contain LAC decreases at higher latitudes. The derived extinction coefficient, which also increases with latitude, reaches a maximum of 1.4 Mm−1 at 66°. The air mass histories associated with the LAC were evaluated with back trajectory analysis using wind field analysis from the European Center …

Sensing properties of ZnO nanostructured layers

2017

Nanostructured ZnO layers have been deposited onto SiO 2 /Si substrates by spray pyrolysis, with previously patterned interdigitated gold electrodes. We have then measured the capacitive and resistive response against ambient parameters such as relative humidity and illumination.

Indagini diagnostiche nella chiesa di Santa Maria delle Stelle a Comiso

2012

La relazione riporta dettagliatamente gli esiti di una campagna d'indagini non distruttive e minimamente invasive svolte nella chiesa madre di Santa Maria delle Stelle a Comiso, su incarico della Soprintendenza ai Beni Culturali e Ambientali della Provincia di Ragusa. Le indagini diagnostiche comprendono la termografia all'infrarosso, l'indagine radar, l'indagine ultrasonica, le ispezioni endoscopiche, il controllo dell'umidità e le verifiche statiche. Technical Report regarding the outcome of a campaign of minimally invasive and non-destructive surveys conducted in the mother church of Santa Maria delle Stelle in Comiso (RG) on assignment by the Superintendence of Cultural Heritage and Env…

MODEL DAN PELUANG TERJADINYA HUJAN BERDASARKAN KELEMBABAN MENGGUNAKAN REGRESI LOGISTIK BINER DI KABUPATEN MANOKWARI

2020

Manokwari Regrency has a tropical climate. This results in significant rainfall. One factor that stimulates rain is humidity. By using binary logistic regression, the model an chance of rainfall based on humidity can be determined. Logistic regression analysis is used to determine the relationship between categorical  scale response variables and numeric or categoric scale explanatory variables. If response variable used is nominal scale with  two possoble value (0 and 1), then it is called binary logistic regression. Estimation of the model  is done by logit  transformation. The model produce in this  study is g(x) = -23.443 + 0.289  humidity. The accuracy of the model is 70.4 percent and …

Soil Water Content Diachronic Mapping: An FFT Frequency Analysis of a Temperature–Vegetation Index

2020

Among the indirect estimation approaches of soil water content in the upper layer of the soil, the &ldquo

Greenhouse climate control using wireless sensors

2008

A wireless sensor network for vineyard management in Sicily (Italy)

2013

Wine quality depends on many factors, such as the choice of variety, stock, training system, pruning as well as environmental parameters and cultivation techniques performed in the vineyard. Monitoring the micro-climate of grapevine allows to conveniently perform the most important cultivation techniques (soil management, pesticide treatments, green pruning, harvest) thus reducing the operating costs of the vineyard, and increasing the overall quality of the grapes. The aim of the present study is to monitor the micro-climate of grapevine in order to control spring period hazards, to reduce the operating costs of the vineyard and to increase the quality of grapes. For this purpose a Wireles…