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Search Results: 1 - 10 of 3155 matches for " conditions. "
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Potential for Growing Salvia hispanica L., Areas under Rainfed Conditions in Mexico  [PDF]
Genovevo Ramírez-Jaramillo, Mónica Guadalupe Lozano-Contreras
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.69100
Abstract: The Salvia hispanica L. is an endemic species Mexican plant, which relevance relies upon its properties as a natural source of omega 3 (α-linolenic acid), soluble and insoluble fibers, proteins, plus some other significant nutritional components. Due to the growing relevance generated by this crop, it became necessary to characterize its physical environment, as well as the natural factors related with its cultivation nationwide, aiming to find those most suitable for its production under rainfed conditions, looking forward to provide the basis to make a decision regarding where to target the agriculture promotion of such cropland. The software used for data process and analysis was the Arc/View 3.3 version. Thus, the crop requirements were recognized in order to analyze those most suitable for chia development in each one of its selected variables in the study hereby. The regionalization and mapping aimed to detect both the optimal and suboptimal potential areas for such crop were carried out, afterwards. It was finally determined that Mexico holds a total of 2,512,359 hectares with an optimal or high cultivation potential, whereas the areas with a medium or suboptimal potential are close to 3,658,089 hectares, which can be set under rainfed conditions.
A Note on the Guignard Constraint Qualification and the Guignard Regularity Condition in Vector Optimization  [PDF]
Giorgio Giorgi
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.44101

Some remarks are made on the use of the Abadie constraint qualification, the Guignard constraint qualifications and the Guignard regularity condition in obtaining weak and strong Kuhn-Tucker type optimality conditions in differentiable vector optimization problems.

Possible Signs of Life on the Planet Venus  [PDF]
Leonid V. Ksanfomality
International Journal of Astronomy and Astrophysics (IJAA) , 2013, DOI: 10.4236/ijaa.2013.31007

It is possible, the question on the existence of extraterrestrial life will be answered not as a result of its search for in other worlds removed by distances of dozens of parsecs but on the surface of Venus, i.e., of the nearest planet of the Solar system. The search for “habitable zones” in extrasolar planetary systems is based on the postulate on “normal” physical conditions, i.e., the pressure, temperature, and maybe atmospheric composition similar to those on Earth. But could not such an approach be a kind of “terrestrial chauvinism”? Considering the conditions on Venus as a possible analogue of physical conditions on low-orbiting exoplanets of the “super-Earths” type, a new analysis of Venusian surface panoramas’ details has been made. These images were produced by the VENERA landers in 1975 and 1982. A few relatively large objects were found with size ranging from a decimeter to half meter and with unusual morphology. The objects were observed in some images, but were absent in the other or altered their shape. The article presents the obtained results and analyzes the evidence of reality of these objects.

On the Second Order Optimality Conditions for Optimization Problems with Inequality Constraints  [PDF]
Mourad Naffouti
Open Journal of Optimization (OJOp) , 2013, DOI: 10.4236/ojop.2013.24014

A nonlinear optimization problem (P) with inequality constraints can be converted into a new optimization problem (PE) with equality constraints only. This is a Valentine method for finite dimensional optimization. We review second order optimality conditions for (PE) in connection with those of (P). A strictly complementary slackness condition can be made to get the property that sufficient optimality conditions for (P) imply the same property for (PE). We give some new results (see Theorems 3.1, 3.2 and 3.3) .Without any assumption, a counterexample is given to show that these conditions are not equivalent.

Examining the Role of Brazilian Navy before Alcohol Intake in the Workplace  [PDF]
Elizabeth Espindola Halpern, Ligia Costa Leite
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.52016

This article presents some of the results of a qualitative research conducted at the Center for Chemical Dependency (CEDEQ) of Brazilian Navy, a specialized outpatient clinic for substance abuse, in order to investigate the role of this institution in the construction of the military patients’ alcoholism. A participant observation was carried out in two treatment groups, during 24 sessions, in 2010. In addition, individual open-ended interviews with 13 patients were carried out after each group session. According to their narratives they tend to believe that the institution both stimulates and prohibits the consumption of alcohol on board, an ambivalent position that contributes to the production of alcohol addiction in these individuals. As a result, the incorporation of standards of conduct related to alcohol consumption throughout their military career was observed, creating drinking patterns, especially drinking with colleagues of their military units, which we named alcoholic habitus.

Surface Wave Propagation in a Generalized Thermoelastic Material with Voids  [PDF]
Baljeet Singh, Raj Pal
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.25068
Abstract: In the present paper, the propagation of surface wave in a generalized thermoelastic solid with voids is considered. The governing equations are solved to obtain the general solution in x-z plane. The appropriate boundary conditions at an interface between two dissimilar half-spaces are satisfied by appropriate particular solutions to obtain the frequency equation of the surface wave in the medium. Some special cases are also discussed.
Effect of Pre-Analytical Conditions on Salivary Nitrite Levels  [PDF]
Rosana Andrea Morelatto, Tomás Enrique Benavidez, Ana María Baruzzi, Velia Matilde Solís, Silvia Adriana López de Blanc
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.26078
Abstract: The aim of the present paper was to analyze the influence of sampling and storage procedures on nitrite con- centration values in the saliva of healthy persons. The samples were obtained and stored under varied condi- tions, and processed using the Griess method. Results: when the salivary nitrite concentration was measured immediately after collection a significant dependence on the collection time was observed. A mean value of 94 µmol/L (range 3 - 625) was obtained at 8:30 am. This value decreased significantly with time (p < 0.05) reaching a value of 68 at 12:30 noon. Concerning the sample storage, a significant increase in the nitrite concentration was observed after 2 hrs, either at 4?C or at room temperature (p < 0.05). In spite of the high variability between individuals the values for each individual showed a marked constancy independent of the sampling day. According to our results, by controlling pre-analytical parameters, principally sampling and storage procedures, reproducibility is improved.
Testing Some f(R,T) Gravity Models from Energy Conditions  [PDF]
Flavio Gimenes Alvarenga, Mahouton Jonas Stephane Houndjo, Adjimon Vincent Monwanou, Jean Bio Chabi Orou
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.41019

We consider f(R,T) theory of gravity, where R is the curvature scalar and T is the trace of the energy momentum tensor. Attention is attached to the special case, f(R,T)=R+2f(T) and two expressions are assumed for the function f(T),(a1Tn+b1)/(a2Tn+b2) and a3Inq(b

The Matching Conditions for the Distribution Functions of Boltzmann Equation in Nonequilibrium Transport  [PDF]
Zhengchuan Wang
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.41004
Abstract: Based on the equation of motion in nonequilibrium Green function formalism, the matching conditions for the distribution functions of Boltzmann equation at interfaces of metallic multilayers are investigated in the nonequlibrium transport procedure. We also explore the matching conditions when the current-induced spin accumulation is accounted for, the contribution of coulomb interaction due to accumulated electrons is included. In order to study the matching conditions in the position space, we generalize the tunneling Hamiltonian to the formalism in position space, the matching conditions in this case is then obtained, which is convenient for us to match the usual distribution function of Boltzmann equation.
Pitfalls and Remedies in DEA Applications: How to Handle an Occurrence of Zero in Multipliers by Strong Complementary Slackness Conditions  [PDF]
Toshiyuki Sueyoshi, Mika Goto
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.55A005
Abstract: This study discusses a guideline on a proper use of Data Envelopment Analysis (DEA) that has been widely used for performance analysis in public and private sectors. The use of DEA is equipped with Strong Complementary Slackness Conditions (SCSCs) in this study, but an application of DEA/SCSCs depends upon its careful use, as summarized in the guideline. The guideline consists of the five suggestions. First, a data set used in the DEA applications should not have a ratio variable (e.g., financial ratios) in an input(s) and/or an output(s). Second, radial DEA models under variable and constant Returns to Scale (RTS) need a special treatment on zero in a data set. Third, the DEA evaluation needs to drop an outlier. Fourth, an imprecise number (e.g., 1/3) may suffer from a round-off error because DEA needs to specify it in a precise expression to operate a computer code. Finally, when a large input or output variable may dominate other variables in DEA computation, it is necessary to normalize the data set or simply to divide each observation by its average. Such a simple treatment produces more reliable DEA results than the one without any data adjustment. This study also discusses how to handle an occurrence of zero in DEA multipliers by applying SCSCs. The DEA/SCSCs can serve for a multiplier restriction approach without any prior information. Thus, the propesed DEA/SCSCs can provide more reliable results than a straight use of DEA.
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