نتایج جستجو برای: additive effect
تعداد نتایج: 1694315 فیلتر نتایج به سال:
Dehydration is the most important limiting factor in agricultural production in arid and semi-arid regions, and water shortages (especially at the reproductive stages) due to lack of precipitation and unequal distribution are inappropriate for limiting the yield. In this research, cross between the Gasspard cultivar (dehydrated susceptible parent) and DN11 line (resistant parent) was performed....
In this paper, VO2 nanorods were produced by hydrothermal assisted synthesis of equimolar aqueous NH4Cl and NaVO3 solution. Effect of time and the amount of ethylenediaminetetracetic acid (EDTA) additive on morphology and composition of the final product was determined. The optimum concentration of EDTA was determined to be 0.007 gm/cm3 and the optimum time of the synthesis was 24 h.
Breeders often use generation means analysis to obtain information about inheritance, gene action, and to determine effective breeding methods to improve important agronomic traits, especially under drought stress conditions. To investigate the genetic parameters of agronomic and morphological traits in durum wheat, a field experiment was carried out using F1, F2, BC1 and BC2 generations obtain...
The past decade has seen a growth in the development and deployment of educational technologies for assisting college-going students in choosing majors, selecting courses and acquiring feedback based on past academic performance. Grade prediction methods seek to estimate a grade that a student may achieve in a course that she may take in the future (e.g., next term). Accurate and timely predict...
The perceived color of a light can be greatly affected by superimposing it upon a chromatic adapting field. In 1976, Walraven investigated the effect of chromatic adaptation on color perception and concluded it may be characterized completely by a gain change which operates only on the incremental stimulus (i.e. the superimposed test field). He proposed that the quanta from the background are s...
BACKGROUND In both observational and randomized studies, associations with overall survival are by and large assessed on a multiplicative scale using the Cox model. However, clinicians and clinical researchers have an ardent interest in assessing absolute benefit associated with treatments. In older patients, some studies have reported lower relative treatment effect, which might translate into...
BACKGROUND For complex multifactorial diseases it seems likely that co-exposure to two risk factors will show a greater than additive relationship on disease risk. AIMS To test whether greater than additive relationships occur between risk factors for psychosis. METHOD A cohort study of 50 053 Swedish conscripts. Data on IQ, cannabis use, psychiatric diagnoses, disturbed behaviour and socia...
Recent theory in causal inference has provided concepts for mediation analysis and effect decomposition that allow one to decompose a total effect into a direct and an indirect effect. Here, it is shown that what is often taken as an indirect effect can in fact be further decomposed into a "pure" indirect effect and a mediated interactive effect, thus yielding a three-way decomposition of a tot...
The embedding of additive noise sequences is often used to hide information in digital audio, image or video documents. However, the embedded information might be impaired by involuntary or malicious “attacks.” This paper shows that quantization attacks cannot be described appropriately by an additive white Gaussian noise (AWGN) channel. The robustness of additive watermarks against quantizatio...
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