Unterrichtsplanung und ihre Bedeutung für den Sportunterricht. Eine empirische Studie zu Zufriedenheit, Selbstkonzept und Zielorientierung.

Zusammenfassung Unterrichtsplanung und ihre Bedeutung für den Sportunterricht. Eine empirische Studie zu Zufriedenheit, Selbstkonzept und Zielorientierung In der vorliegenden Studie wurde der Einfluss der Unterrichtsplanung auf die Zufriedenheit des Lehrers mit der Gestaltung des Sportunterrichts und dem Selbstkonzept, der Zielorientierung, dem Interesse sowie der Langeweile der Schüler untersucht. Dabei kann die Wirkung auf die Schüler nicht losgelöst von der Frage des Einflusses der Faktoren Berufserfahrung und Klassenanzahl auf die Unterrichtsplanung nachgegangen werden. Die Studie wurde empirisch angegangen. Hierzu wurde im Rahmen eines quasiexperimentellen Zweigruppen-Designs eine männliche Zufallsstichprobe von 330 Grundschüler und 11 Lehrern an verschiedenen Schulen in Jordanien mit Hilfe von standardisierten schriftlichen Befragung untersucht. Die Konstruktvalidität und Reliabilität der Schülerfragebögen wurden durch die Faktoren- und Itemanalyse ermittelt. Diese Analysen zeigten, dass die Erhebung durch einen Fragebogen, der individualistische Werte westlicher Kulturen beinhaltete, bei anderen Kulturen auf Grenzen stößt, z. B. bei der vermuteten Problematik der Art und Denkweise der Probanden. Die Art und Denkweise jordanischer Schüler ist im Gegensatz zu westlichen Schülern altruistisch ausgerichtet. Für weitere Untersuchungen könnte dies einen spannenden und fruchtbaren Ansatzpunkt darstellen. Da die Anzahl der Fälle der untersuchten Lehrer zu niedrig war, konnte die Auswahl und Selektion der Items zu Zufriedenheit nicht nach den üblichen statistischen Verfahren Faktorenanalyse und Reliabilitätsanalyse erfolgen. Bei der Auswertung des Fragebogens zur Zufriedenheit der Lehrer wurde eine tendenziell positive Verbesserung im Nachversuch festgestellt. Bezüglich der Effekte auf die Schüler konnte mit Hilfe von mehrfaktoriellen Varianzanlysen folgendes festgestellt werden: Die Unterrichtsplanung fördert das Selbstkonzept und die Aufgabenorientierung. Das ist die Grundlage für eine positive Schülerentwicklung bzw. die Förderung der Identität einzelner Schüler. Mangelnde Unterrichtsplanung stellt keine zuträgliche Maßnahme für die Förderung des Selbstkonzepts und der Aufgabenorientierung von Schülern dar. Die Berufserfahrung wirkt sich auf das Selbstkonzept in Abhängigkeit von der Klassenanzahl aus. Ihre Wirkung auf die Aufgabenorientierung ist unabhängig. Der Effekt der Unterrichtsplanung auf die Egoorientierung, das Interesse und die Langeweile hängt von der Klassenanzahl ab. Summary: Lesson planning and its importance for the sport lesson. An empiric study of satisfaction, self concept and goal orientation This study examines the influence of lesson planning on satisfaction of teachers with the later held lesson and the impact on pupils, especially the self concept, goal orientation, interest an boredom. The influence of professional experience and number of classes on lesson planning has to be considered This study is based on empirical field work. A quasi-experimental two-group design was chosen. The study took place in different Jordan primary schools. The sample was chosen by random. At last 11 teachers and 330 male pupils filled in the written questionnaire. The construct validity and reliability of the written questionnaire of the pupils was tested by a factor and an item analysis. The result was, that the questionnaire contained individualistic values of western culture, they did not fit with the Jordan culture. The values of Jordan pupils are altruistic orientated. This result is an interesting and fruitful starting point for further research. The number of examined teachers was too low to be tested with the common utilities like factor or reliability analysis. The main results were: Lesson planning has a positive impact on satisfaction of teachers with the later held lesson. The impact on pupils was examined by a multiple analysis of variance. Lesson planning has a positive effect on self concept and goal orientation, so lesson planning is good for a positive development of the pupils and their identity. The professional experience of the teacher is influencing the self concept in dependence of the number of classes, but there is no impact on the goal orientation. The effect of the lesson planning on the ego orientation, the interest for the lesson and boredom depends on the number of classes

Thermodynamics of the interacting Fermi-system in the Static Fluctuation Approximation

We suggest a new method of calculation of the equilibrium correlation functions of an arbitrary order for the interacting Fermi-gas model in the frame of the static fluctuation approximation (SFA) method. This method based only on the single and controllable approximation allows to obtain the so-called far-distance equations (FDEs). These equations connecting the quantum states of a Fermi particle with variables of the local field operator contains all necessary information related to calculation of the desired correlation functions and basic thermodynamic parameters of the many-body system considered. The basic expressions for the mean energy and heat capacity for electron gas at low temperatures in the limit of high density were obtained. All expressions are given in the units of r_s,where r_s determines the ratio of a mean distance between electrons to the Bohr radius a_0. In these expressions we calculated the terms of the order r_s and r_s^2, correspondingly. It was shown also that the SFA allows to find the terms related with high orders of the decomposition with respect to the parameter r_s.Comment: 22 pages, 5 figure

Synthesis of Nanosilica for the Removal of Multicomponent Cd2+ and Cu2+ from Synthetic Water: An Experimental and Theoretical Study

Copper and cadmium ions are among the top 120 hazardous chemicals listed by the Agency for Toxic Substances and Disease Registry (ATSDR) that can bind to organic and inorganic chemicals. Silica is one of the most abundant oxides that can limit the transport of these chemicals into water resources. Limited work has focused on assessing the applicability of nanosilica for the removal of multicomponent metal ions and studying their interaction on the surface of this adsorbent. Therefore, this study focuses on utilizing a nanosilica for the adsorption of Cd2+ and Cu2+ from water. Experimental work on the single- and multi-component adsorption of these ions was conducted and supported with theoretical interpretations. The nanosilica was characterized by its surface area, morphology, crystallinity, and functional groups. The BET surface area was 307.64 m2/g with a total pore volume of (Formula presented.) cm3/g. The SEM showed an irregular amorphous shape with slits and cavities. Several Si-O-Si and hydroxyl groups were noticed on the surface of the silica. The single isotherm experiment showed that Cd2+ has a higher uptake (72.13 mg/g) than Cu2+ (29.28 mg/g). The multicomponent adsorption equilibrium shows an affinity for Cd2+ on the surface. This affinity decreases with increasing Cu2+ equilibrium concentration due to the higher isosteric heat from the interaction between Cd and the surface. The experimental data were modeled using isotherms for the single adsorption, with the Freundlich and the non-modified competitive Langmuir models showing the best fit. The molecular dynamics simulations support the experimental data where Cd2+ shows a multilayer surface coverage. This study provides insight into utilizing nanosilica for removing heavy metals from water. 2022 by the authors.The authors would like to acknowledge the University of Jordan, Deanship of Scientific research, and the Department of Chemical Engineering for providing the facility to conduct this research; the Gas Processing Center at Qatar University for performing the characterization techniques for the samples; and Hassan Asiri from King Fahd University of Petroleum and Minerals for providing access to the dynamic molecular simulator.Scopu

Weak 3He\text{}^{3}He Pairing in 3He−He(II)\text{}^{3}He-He(II) Mixtures

In this paper a theoretical study of a possible phase transition in dilute $\text{}^3He-He(II)$ mixtures is presented using the Galitskii-Migdal-Feynman formalism. The effective scattering length is calculated from the Galitskii-Migdal-Feynman T-matrix, which is essentially the effective scattering amplitude dependent on the medium. It is found that at very low $\text{}^3He$ concentrations the s-wave effective scattering length for ^3He-He(II) varies discontinuously from positive to negative values at some critical concentration. This indicates a crossover from a regime with dimers to another with the Cooper pairs. The binding energy of the weakly-bound dimers $\text{}^3He_2$ is computed. The effective p-wave scattering lengths are calculated and compared to the effective s-wave scattering lengths at low and high concentrations. It is found that p-scattering has an important effect on the instability of these mixtures at concentrations x > 1%. Finally, the transport coefficients are computed and compared to the theoretical predictions of Fu and Pethick and the experimental results of König and Pobell

Scattering Properties of Argon Gas in the Temperature Range 87.3-120 K

A theoretical model, based on the Galitskii-Migdal-Feynman formalism, is introduced for determining the scattering properties of argon gas, especially the "effective" total, viscosity and average cross-sections. The effective phase shifts are used to compute the quantum second virial coefficient in the temperature range 87.3-120 K. The sole input is the Hartree-Fock dispersion (HFD-B3) potential. The thermophysical properties of the gas are then calculated. The results are in good agreement with experimental data

Scattering properties of argon gas in the temperature range 87.3-120 K

A theoretical model, based on the Galitskii-Migdal-Feynman formalism, is introduced for determining the scattering properties of argon gas, especially the "effective" total, viscosity and average cross-sections. The effective phase shifts are used to compute the quantum second virial coefficient in the temperature range 87.3-120 K. The sole input is the Hartree-Fock dispersion (HFD-B3) potential. The thermophysical properties of the gas are then calculated. The results are in good agreement with experimental data

Synthesis of Nanosilica for the Removal of Multicomponent Cd2+ and Cu2+ from Synthetic Water: An Experimental and Theoretical Study

Copper and cadmium ions are among the top 120 hazardous chemicals listed by the Agency for Toxic Substances and Disease Registry (ATSDR) that can bind to organic and inorganic chemicals. Silica is one of the most abundant oxides that can limit the transport of these chemicals into water resources. Limited work has focused on assessing the applicability of nanosilica for the removal of multicomponent metal ions and studying their interaction on the surface of this adsorbent. Therefore, this study focuses on utilizing a nanosilica for the adsorption of Cd2+ and Cu2+ from water. Experimental work on the single- and multi-component adsorption of these ions was conducted and supported with theoretical interpretations. The nanosilica was characterized by its surface area, morphology, crystallinity, and functional groups. The BET surface area was 307.64 m2/g with a total pore volume of 4.95×10−3 cm3/g. The SEM showed an irregular amorphous shape with slits and cavities. Several Si–O–Si and hydroxyl groups were noticed on the surface of the silica. The single isotherm experiment showed that Cd2+ has a higher uptake (72.13 mg/g) than Cu2+ (29.28 mg/g). The multicomponent adsorption equilibrium shows an affinity for Cd2+ on the surface. This affinity decreases with increasing Cu2+ equilibrium concentration due to the higher isosteric heat from the interaction between Cd and the surface. The experimental data were modeled using isotherms for the single adsorption, with the Freundlich and the non-modified competitive Langmuir models showing the best fit. The molecular dynamics simulations support the experimental data where Cd2+ shows a multilayer surface coverage. This study provides insight into utilizing nanosilica for removing heavy metals from water

Thermodynamic Properties of Graphene Using the Static Fluctuation Approximation (SFA)

The thermodynamic properties of two-dimensional graphene nanosystems are investigated using the static fluctuation approximation (SFA). These properties are analyzed using both extensive and nonextensive statistical mechanics. It is found that these properties are less sensitive to the temperature when using nonextensive â in contrast to extensive â statistical mechanics. It is also noted that the mean internal energy and the specific heat behave as a power-law,T^Îą, at TThe accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author