scholarly journals Electronic Measurement of Changes in the Volume of Pore Water During Testing of Soil Samples

1971 ◽  
Vol 8 (2) ◽  
pp. 341-345 ◽  
Author(s):  
R. J. Mitchell ◽  
K. N. Burn

Two systems are described for electronic recording of changes in the volume of pore water for triaxial testing of soils: one using a miniature force transducer to measure by direct weighing; the other based upon a float system connected to the core of a differential transformer. Both systems provide measurement of volume change at least as accurately as may be obtained by visual reading of burettes graduated to 0.1 cm3, i.e. to ± 0.05 cm3.

2020 ◽  
Author(s):  
Jelena Popović-Djordjević ◽  
Zoran Broćić ◽  
Mirjana Kresović ◽  
Jelena Mutić

<p>Potato is currently the third most significant crop culture in the world, with the production of over 388 million tons in 2016. This crop is present on the tables of Serbian consumers throughout the year because of the tradition and its affordable price. Serbia has relatively good climatic conditions for potato production, which are defined by the temperature regime and the amount and frequency of precipitation. The nutritive value of the potato is mainly attributed to the chemical composition of the tuber. The element composition of tubers depends on many factors, such as: genotype, developmental phase of the plant, agroecological conditions, chemical properties of soil, fertilization and irrigation. On the other hand, geochemical origin of trace elements in the soil, the intensive agriculture production, use of contaminated soil and irrigation water may increase their toxic levels in tubers.</p><p> Potato tubers of five varieties were produced on commercial farms at two locations in Western Serbia (Guča and Sjenica), with favorable agroecological conditions for potato production. Tuber samples of studied varieties from each location were collected at the end of growing seasons at the stage of physiological maturity. Soil samples were collected from several sites at each production location at the depth of 0–30 cm. Basic agrochemical properties of the soil samples were determined. Content of toxic (As, Cd, Pb) and potentially toxic (Al, Ba, Ni, V) elements in fresh tubers (peel and core) and soil samples was established by inductively coupled plasma–optical emission spectrometry (ICP–OES). Bioaccumulation factor (BAF) of each studied element, as the ratio between its content in the peel and in the core of the tuber and the soil, was calculated.</p><p> According to pH values, 4.77 and 6.80, soils were clasified as very acidic (Guča location) and slightly acidic (Sjenica location), respectively. Content of studied trace elements in soils, with the exception of Ni, was within the allowable limits. Tuber peel of all studied varieties grown on both soil types was characterized with the higher content of Cd, Al, Ba and Ni, compared to the relevant core. Consenquently, the higher values of BAF were observed in the peel of tubers. Average values of BAF for the studied elements in the peel for both soil pH values 4.77 and 6.80 (Guča and Sjenica, respectively) were in the following order: Cd>Ba>Pb>As>Ni>Al=V. On the other hand, average BAF values for the core of the tuber samples were in a slightly different order, depending on the soil pH; Cd>Pb>As>Ba>Ni>Al=V (pH 4.77) and Cd>Pb>As>Ba=Ni>V (pH 6.80). The highest/lowest BAFs were calculated for Cd (0.339) in the peel and Al (0.0002) in the core, respectively. Content of As and Cd did not exeed the maximum allowed concentrations set by the national and European Union regulations, but it should be pointed out that Cd content was close to the upper limit. Also, it was noticed that the content of Pb exceeded the safe limit set for these elements according to both regulations.</p><p>Keywords: potato tuber, soil, toxic elements, ICP</p><p>Acknowledgement: This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Research grant No. 46009).</p>


2003 ◽  
pp. 15-26
Author(s):  
P. Wynarczyk
Keyword(s):  
The Core ◽  

Two aspects of Schumpeter' legacy are analyzed in the article. On the one hand, he can be viewed as the custodian of the neoclassical harvest supplementing to its stock of inherited knowledge. On the other hand, the innovative character of his works is emphasized that allows to consider him a proponent of hetherodoxy. It is stressed that Schumpeter's revolutionary challenge can lead to radical changes in modern economics.


Derrida Today ◽  
2010 ◽  
Vol 3 (1) ◽  
pp. 21-36
Author(s):  
Grant Farred

‘The Final “Thank You”’ uses the work of Jacques Derrida and Friedrich Nietzsche to think the occasion of the 1995 rugby World Cup, hosted by the newly democratic South Africa. This paper deploys Nietzsche's Zarathustra to critique how a figure such as Nelson Mandela is understood as a ‘Superman’ or an ‘Overhuman’ in the moment of political transition. The philosophical focus of the paper, however, turns on the ‘thank yous’ exchanged by the white South African rugby captain, François Pienaar, and the black president at the event of the Springbok victory. It is the value, and the proximity and negation, of the ‘thank yous’ – the relation of one to the other – that constitutes the core of the article. 1


2019 ◽  
Vol 1 (1) ◽  
pp. 138
Author(s):  
Saif Nasrat Tawfiq Al - Haramazi

The theoretical curriculum in all disciplines is a basic requirement that nourishes the minds of the intellectual and cognitive recipients in the various scientific and cognitive stages. This is the framework that distinguishes the academic understanding of the anarchic, which is one of the most important and important keys in thinking and success in that jurisdiction or field, , Because it is unreasonable and logical to get into the core of any subject without searching and searching for its intellectual and historical bases to find out the reasons and reasons that surrounded this idea which was later recognized as an important contribution to the field of human sciences. Applied Sciences and other from the other side.


Imbizo ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 40-54
Author(s):  
Oyeh O. Otu

This article examines how female conditioning and sexual repression affect the woman’s sense of self, womanhood, identity and her place in society. It argues that the woman’s body is at the core of the many sites of gender struggles/ politics. Accordingly, the woman’s body must be decolonised for her to attain true emancipation. On the one hand, this study identifies the grave consequences of sexual repression, how it robs women of their freedom to choose whom to love or marry, the freedom to seek legal redress against sexual abuse and terror, and how it hinders their quest for self-determination. On the other hand, it underscores the need to give women sexual freedom that must be respected and enforced by law for the overall good of society.


Author(s):  
Rakshith . ◽  
Shivakumar . ◽  
Sreeharsha . ◽  
Divyasree .

The core principles in Ayurveda give prime importance to Agni, Prakriti, Ahara (food) and Vihara (lifestyle) in maintaining health. Present era people are scheduled to one or the other works due to which they are following unrightful food and habits which lead the manifestation of one of the common disorder which troubles person a lot - Amlapitta. By excess “Hurry, Worry and Curry” GIT disorders are the most common, not only affecting physical health but also psychological and social health. Amlapitta is one of that and it is a burning problem of the whole World. Amalpitta is composed of word Amla and Pitta. Amlapitta is a very common disease caused by Vidagdha Pitta with features like Amlodgara, Tiktodgara, Hrit, Kantha Daha etc. Pathya recommended in Amlapitta are Yava, Godhuma, Purana Shali, Mudga Yusha, Lajasaktu etc. Apathya recommended in Amlapitta are Navanna, Avidugdha, Masha, Kulattha, Dadhi and etc. So this present review article throws light on Pathya (conducive) and Apathya (non conducive) in Amlapitta.


2021 ◽  
Vol 13 (15) ◽  
pp. 8333
Author(s):  
Mirella Soyer ◽  
Koen Dittrich

In this study we investigate how consumers in The Netherlands can be persuaded to adopt sustainable practices when purchasing, using and disposing of clothes. This study investigates the attitude-behavior gap for the sustainable choices for purchase, use and disposing of clothes. For each consumption phase we ran a two-step multiple regression. The findings showed that the importance of the factors vary in the three consumption phases. For purchasing and disposal decisions, the core motivator social motivation predicts sustainable practices best, while it has no role in the usage phase. The factor ability appeared to have a significant role in the disposal phase, but not in the other phases. Finally, the trigger appears to lower the consumers’ ability in the purchasing phase, while it enhances the core motivator social evaluation in the disposal phase.


2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Umar Farooque ◽  
Rakesh Ranjan

AbstractIn order to select the heterogeneous multicore fiber (MCF) configuration with ultra-low crosstalk and low peak bending radius, comparative crosstalk analysis have been done for the three possible core configurations, namely, Configuration 1 - different refractive index (R.I.) and different radius, Configuration 2 - different R.I., and Configuration 3 - different radius. Using the coupled mode equation and the simplified expressions of mode coupling coefficient (MCC) for different configurations of heterogeneous cores, the crosstalk performance of all the heterogeneous MCF configurations along with the homogeneous MCF have been investigated analytically with respect to core pitch (D) and fiber bending radius (${R}_{b}$). Further, these expressions of MCC have been extended to obtain the simplified expressions of MCC for the estimation of crosstalk levels in respective trench-assisted (TA) heterogeneous MCF configurations. It is observed from the analysis that in Configuration 1, crosstalk level is lowest and the rate of decrease in the crosstalk with respect to the core pitch is highest compared to the other configurations of heterogeneous MCF. The values of crosstalk obtained analytically have been validated by comparing it with the values obtained from finite element method (FEM) based numerical simulation results. Further, we have investigated the impact of a fixed percent change (5%) in the core parameters (radius and/or R.I.) of one of the core of a homogeneous MCF, to realize the different heterogeneous MCF configurations, on the variations in crosstalk levels, difference in the mode effective refractive index of the core 1 and core 2 ($\Delta {n}_{eff}={n}_{eff1}-{n}_{eff2}$), and the peak bending radius (${R}_{pk}$). For the same percent variations (5%) in the core parameters (radius and/or R.I.) of different configurations of cores (Config. 1-Config. 3), Config. 1 MCF has highest variation in $\Delta {n}_{eff}$ value compared to other configurations of MCF. Further, this highest variation in $\Delta {n}_{eff}$ value of Config. 1 MCF results in smallest peak bending radius. The smaller value of peak bending radius allows MCF to bend into smaller radius. Therefore, Configuration 1 is the potential choice for the design of MCF with smaller peak bending radius and ultra-low crosstalk level compared to the other configurations of SI-heterogeneous MCF.


Author(s):  
Jehan Khalil ◽  
Hasan Habib ◽  
Michael Alabboud ◽  
Safwan Mohammed

AbstractOlive mill wastewater is one of the environmental problems in semiarid regions. The main goals of this study were to investigate the impacts of different olive mill wastewater levels on durum wheat (Triticum aestivum var. Douma1) production and soil microbial activities (i.e., bacteria and fungi). A pot experiment was conducted during the growing seasons 2015/2017 to evaluate the effect of three levels of olive mill wastewater on both growth and productivity attributes of wheat. Vertisol soil samples were collected from southern Syria. Two months before wheat cultivation, three levels of olive mill wastewater: T5 (5 L/m 2), T10 (10 L/m2) and T15 (15 L/m 2) were added to pots filled with the collected soil samples. Also, a control (T0) free of olive mill wastewater was considered as a reference. Results showed a significant increase (p < 0.05) in germination rate (%), plant height (cm), ear length (cm), kernels number, kernels weight per ear (g) and grain yield (g/m2) compared to control. However, T5 treatment did not induce a significant increase in terms of ear length, kernels weight per ear or yield (in the second season). On the other hand, T10 treatment had recorded the best results compared with the other two treatments (T5, T15). Similarly, the results showed a significant increase in the number of bacterial and fungi cells by increasing olive mill wastewater concentration. This research provides promising results toward using olive mill wastewater in an eco-friendly way under Syrian conditions.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Riikka Nissi ◽  
Melisa Stevanovic

Abstract The article examines how the aspects of the social world are enacted in a theater play. The data come from a videotaped performance of a professional theater, portraying a story about a workplace organization going through a personnel training program. The aim of the study is to show how the core theme of the play – the teaming up of the personnel – is constructed in the live performance through a range of interactional means. By focusing on four core episodes of the play, the study on the one hand points out to the multiple changes taking place both within and between the different episodes of the play. On the other hand, the episodes of collective action involving the semiotic resources of singing and dancing are shown to represent the ideals of teamwork in distinct ways. The study contributes to the understanding of socially and politically oriented theater as a distinct, pre-rehearsed social setting and the means and practices that it deploys when enacting the aspects of the contemporary societal issues.


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