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Magnetic Properties of Ho1−xLuxB12 Solid Solutions
S. Gab´ani,E. Ga˘zo,G. Prist´a˘s,I. Tak´a˘cov´a,K. Flachbart,N. Shitsevalova,K. Siemensmeyer,N. Sluchanko 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10
Magnetic properties of the geometrically frustrated antiferromagnet HoB12 (with TN = 7.4 K)modified by substitution of magnetic Ho atoms through non-magnetic Lu ones are presented and discussed. In this case, in Ho1−xLuxB12 solid solutions, both chemical pressure resulting from different Lu3+ and Ho3+ radii and magnetic dilution take place with increasing Lu content (x) that change properties of the system. The received results show strong indication for the existence of a quantum critical point near x = 0.9, which separates the region of magnetic order (starting with HoB12 for x = 0) and the nonmagnetic region (ending with superconducting LuB12 for x = 1).
Transport Properties of Ho1−xLuxB12 Solid Solutions
S. Gab´ani,I. Bat’ko,M. Bat’kov´a,K. Flachbart,E. Ga˘zo,G. Prist´a˘s,I. Tak´a˘cov´a,A. V. Bogach,N. E. Sluchanko,N. Yu. Shitsevalova 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10
Our studies of Ho1−xLuxB12 solid solutions have shown that the temperature of antiferromagnetic (AF) order in geometrically frustrated system of HoB12 (TN = 7.4 K) is linearly suppressed to zero temperature, i.e. TN →0, as lutetium concentration increases to x→xc ≈ 0.9. In this contribution,we present original results of electrical resistivity measurements on Ho1−xLuxB12 single crystalline samples with x = 0, 0.2, 0.5, 0.7, 0.9, 1 in the temperature range 0.06 - 300 K and in magnetic fields (B) up to 8 T. Complex B vs TN phase diagrams were received from precise temperature ρ(T) and field ρ(B) dependences of resistivity with several AF phases for x ≤ 0.5 pointing to a possibility of quantum critical point at xc ≈ 0.9. The scattering of conduction electrons in the AF phase and in the paramagnetic phase as well as Hall effect results are analyzed and discussed for various concentrations x, when magnetic dilution increases with the increasing content of nonmagnetic Lu ions in the Ho1−xLuxB12 system.
What Stresses Coaches in Competition and Training? An Exploratory Inquiry
Stiliani “Ani” Chroni,Mary Hassandra,Christopher Schoen 한국코칭능력개발원 2013 International Journal of Coaching Science Vol.7 No.1
This study used an exploratory qualitative approach to identify coaches’ stressors in the distinct settings of competition and training. The 27 participants represented various team and individual sports. Answers to the open-ended question “For what reasons do you as a coach get stressed in competition and training?” were approached with content analysis. Concerning coaches’ stressors when in training, the raw themes were initially organized into eight (8) lower-order and then into four (4) higher-order categories, whereas 12 lower- and five (5) higher-order categories of stressors in competition were formed. In addition, a category labeled ‘pressure and expectations’ emerged above and beyond the specificities of the training and competition settings. The information gathered in this study offers a new, situation-specific perspective into coach stressors relating to the two major components of their job. Findings are reframed within the existing literature and attention is called to the need for more research on competition and training stressors for enhancing coaching efficiency through education and consulting services.
Free vibration analysis of angle-ply laminated composite and soft core sandwich plates
Meriem Sahla,Hayat Saidi,Kada Draiche,Abdelmoumen Anis Bousahla,Fouad Bourada,Abdelouahed Tounsi 국제구조공학회 2019 Steel and Composite Structures, An International J Vol.33 No.5
In this work, a simple four-variable trigonometric shear deformation model with undetermined integral terms to consider the influences of transverse shear deformation is applied for the dynamic analysis of anti-symmetric laminated composite and soft core sandwich plates. Unlike the existing higher order theories, the current one contains only four unknowns. The equations of motion are obtained using the principle of virtual work. The analytical solution is determined by solving the eigenvalue problem. The influences of geometric ratio, modular ratio and fibre angle are critically evaluated for different problems of laminated composite and sandwich plates. The eigenfrequencies obtained using the current theory are verified by comparing the results with those of other theories and with the exact elasticity solution, if any.
Mass transfer coefficient of slug flow for organic solvent-aqueous system in a microreactor
Ana Jurinjak Tušek,Iva Anić,Želimir Kurtanjek,Bruno Zelić 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.6
Application of microreactor systems could be the next break-through in the intensification of chemical and biochemical processes. The common flow regime for organic solvent-aqueous phase two-phase systems is a segmented flow. Internal circulations in segments cause high mass transfer and conversion. We analyzed slug flow in seven systems of organic solvents and aqueous phase. To analyze how slug lengths in tested systems depend on linear velocity and physical and chemical properties of used organic solvents, regression models were proposed. It was shown that models based on linearization of approximation by potentials give low correlation for slug length prediction; however, application of an essential nonlinear model of multiple layer perceptron (MLP) neural network gives high correlation with R2=0.9. General sensitivity analysis was applied for the MLP neural network model, which showed that 80% of variance in slug length for the both phases is accounted for the viscosity and density of the organic phases; 10% is accounted by surface tension of the organic phase, while molecular masses and flow rates each account for 5%. For defined geometry of microreactor, mass transfer has been determined by carrying out the neutralization experiment with NaOH where acetic acid diffuses from organic phase (hexane) into aqueous phase. Estimated mass transfer coefficients were in the range kLa=4,652-1,9807 h−1.
The Ritual of Boat Incineration on the Island of Vis, Croatia: an Interpretation
Joško Božanić,Eni Buljubašić 국립민속박물관 2012 International Journal of Intangible Heritage Vol.7 No.-
In the fishing village of Komiža, on the island of Vis,Croatia, there is a centuries-long ritual of incineratingtraditional wooden fishing boats which is linked to thecelebration of a Catholic holiday. Boats are not recognisedas a part of the cultural heritage of Croatia and traditionalboats are not being produced any longer because they arenot seen to have any market value. Therefore, thecontinuation of the burning ritual is seriously threatened. It is argued here that through a re-contextualisation of theceremony within an eco-museum and through similarprojects, the boats could actively contribute to theeconomic life of the community. This issue is addressedfrom the standpoints of the endangered ritual and thecultural significance of the boat. While predominantlyinvestigating its sociological importance and theunderlying semiotic implications of the ritual, anddiscussing the anthropomorphic conceptualisation of theboat within the Komižan community, this article alsoexplores the origins of the burning ritual and similarpractices around the world. The article aims to increasethe recognition of the boat as an object of tangible andintangible heritage, namely as a product of the traditionalmaritime art of ship-building.
Inequality of Opportunity and Degree of Human Development: Evidence from Tunisia
Saidi Anis,Hamdaoui Mekki,Ochi Anis 중앙대학교 경제연구소 2021 Journal of Economic Development Vol.46 No.1
There are many socio-economic factors beyond the individual control that can affect human development indicators. In this setting, this paper aims to examine the effects and evolution of unequal opportunities on the distribution of human development indicators embodied by monetary well-being (consumption) and education in Tunisia for the period 2005-2010. We used parametric and non-parametric approach in addition to Dissimilarity-Index and Shapley’s Decomposition to identify most important factors explaining inequality of chances in Tunisia. We found that Father’s education, residence area, and connection to drinking water appears to be the most important background variables affecting well-being profile. However, child’s sex appears to be the most important determinant of the accessibility to education. Inequality of opportunity in consumption and education persists and tends to increase over time which is undesirable for the country. As an economic implication of our results, policy makers must make appropriate policies to reduce intergenerational transmission of parental background and sex discrimination and to overcome traps of inequality for future generations
Mohammed Cherif Rahmani,Abdelhakim Kaci,Abdelmoumen Anis Bousahla,Fouad Bourada,Abdeldjebbar Tounsi,E.A. Adda Bedia,S.R. Mahmoud,Kouider Halim Benrahou,Abdelouahed Tounsi 사단법인 한국계산역학회 2020 Computers and Concrete, An International Journal Vol.25 No.3
The influence of boundary conditions on the bending and free vibration behavior of functionally graded sandwich plates resting on a two-parameter elastic foundation is examined using an original novel high order shear theory. The Hamilton’s principle is used herein to derive the equations of motion. The number of unknowns and governing equations of the present theory is reduced, and hence makes it simple to use. This theory includes indeterminate integral variables and contains only four unknowns in which any shear correction factor not used, with even less than the conventional theory of first shear strain (FSDT). Unlike any other theory, the number of unknown functions involved in displacement field is only four, as against five, six or more in the case of other shear deformation theories. Galerkin’s approach is utilized for FGM sandwich plates with six different boundary conditions. The accuracy of the proposed solution is checked by comparing it with other closed form solutions available in the literature.
PERIODIC SOLUTIONS FOR DUFFING TYPE p-LAPLACIAN EQUATION WITH MULTIPLE DEVIATING ARGUMENTS
Ani Jiang 한국전산응용수학회 2013 Journal of applied mathematics & informatics Vol.31 No.1
Abstract. In this paper, we consider the Duffing type p-Laplacian equationwith multiple deviating arguments of the form(φp(x′(t)))′+ Cx′(t) + g0(t, x(t)) +Σnk=1gk(t, x(t - τk(t))) = e(t). By using the coincidence degree theory, we establish new results on the existenceand uniqueness of periodic solutions for the above equation. Moreover,an example is given to illustrate the effectiveness of our results.