Photoelectron spectroscopy of NpPd3 and PuPd3

We present the results of x-ray and ultraviolet photoelectron spectroscopy of NpPd3 and PuPd3. The spectra indicate that for both compounds, the 5f electrons are well localized on the actinide sites. Comparison with bulk measurements indicates that for NpPd3 the electrons have a valence of Np3+ and thus a ground state 5f4 with a Hund's rules 5I4 configuration. Similarly for PuPd3, we find a Pu3+ valence, 5f5 ground state and a Hund's rules 6H5/2 configuration

Magnetic and electrical properties of dhcp NpPd3 and U(1-x)Np(x)Pd3

We have made an extensive study of the magnetic and electrical properties of double-hexagonal closepacked NpPd3 and a range of U(1-x)Np(x)Pd3 compounds with x=0.01, 0.02, 0.05, and 0.50 using magnetization, magnetic susceptibility, electrical resistivity, and heat capacity measurements on polycrystalline samples, performed in the temperature range 2-300 K and in magnetic fields up to 9 T. Two transitions are observed in NpPd3 at T=10 and 30 K. Dilute Np samples (x<0.05) exhibit quadrupolar transitions, with the transition temperatures reduced from those of pure UPd3.Comment: 10 pages, 18 figure

Team teaching practice in english teaching and learning process at SMA Negeri I Gedangan Sidoarjo

English as the first foreign language in Indonesia is taught since kindergarten until university. It becomes one of the important lessons in schools. Teaching a language is different from teaching other lessons. Teaching a language is teaching a skill, and skill needs to be practiced, not just stored in the head or admired at a distance. Teaching a language is not as simple job as turning over our palm. It requires a lot of serious and extensive thinking and effort. Especially teaching English, teaching English needs more various activities, practices, medias and tolls. In fact, being an English teacher is not easy, the teacher is demanded to create fun situation in the classroom and also manage classroom well. The teacher has to give pay attention to the needs and the individual differences of students, develops the model and strategy which make the students follow the active, creative, effective and playful of teaching and learning English process In today's schools, teachers are faced with so many complex tasks and with such a diverse student body. There is no way that one teacher alone can help all of their students achieve learning their maximum potential. Ifusually the learning practice which is used is solitaire practice, in this era, several schools in Indonesia apply the new practice, which is called team teaching. This practice is hoped becomes one alternative solution to solve those problems. Karin Goetz explains Team teaching as a group of two or more teachers working together to plan, conduct, and evaluate the learning activities for the same group of learners. This study focuses on how the team teaching practice is used in teaching and learning English process, what are the advantages and disadvantages of team teaching for the teachers and the students, and what are the problems of team teaching and the solutions. For answer those questions, the writer observed the teaching and learning English process at XII IPA class in three meetings. For the data collection technique, the writer used observatio interview, documentation, and questionnaire. The implementation of team teaching in SMA Negeri I Gedangan could be seen at three main jobs, they were planning of teaching and learning, conducting of teaching and learning, and evaluating the process and result of teaching and learning. The advantages of team teaching for the teachers and students were the teachers could complete each other about material practice, and media. The students could get more knowledge from two teachers or more. The disadvantages of team teaching for them were the teachers found the difficult to match their time and the students felt confuse when the teachers had different explanation and perception. The disadvantages of team teaching became the problems which had to find the solutions

Magnetic Excitations in NpCoGa5

We report the results of inelastic neutron scattering experiments on NpCoGa$_{5}$, an isostructural analogue of the PuCoGa$_{5}$ superconductor. Two energy scales characterize the magnetic response in the antiferromagnetic phase. One is related to a non-dispersive excitation between two crystal field levels. The other at lower energies corresponds to dispersive fluctuations emanating from the magnetic zone center. The fluctuations persist in the paramagnetic phase also, although weaker in intensity. This supports the possibility that magnetic fluctuations are present in PuCoGa$_{5}$, where unconventional d-wave superconductivity is achieved in the absence of magnetic order.Comment: 4 pages, 5 figure

Team teaching practice in english teaching and learning process at SMA Negeri I Gedangan Sidoarjo

English as the first foreign language in Indonesia is taught since kindergarten until university. It becomes one of the important lessons in schools. Teaching a language is different from teaching other lessons. Teaching a language is teaching a skill, and skill needs to be practiced, not just stored in the head or admired at a distance. Teaching a language is not as simple job as turning over our palm. It requires a lot of serious and extensive thinking and effort. Especially teaching English, teaching English needs more various activities, practices, medias and tolls. In fact, being an English teacher is not easy, the teacher is demanded to create fun situation in the classroom and also manage classroom well. The teacher has to give pay attention to the needs and the individual differences of students, develops the model and strategy which make the students follow the active, creative, effective and playful of teaching and learning English process In today's schools, teachers are faced with so many complex tasks and with such a diverse student body. There is no way that one teacher alone can help all of their students achieve learning their maximum potential. Ifusually the learning practice which is used is solitaire practice, in this era, several schools in Indonesia apply the new practice, which is called team teaching. This practice is hoped becomes one alternative solution to solve those problems. Karin Goetz explains Team teaching as a group of two or more teachers working together to plan, conduct, and evaluate the learning activities for the same group of learners. This study focuses on how the team teaching practice is used in teaching and learning English process, what are the advantages and disadvantages of team teaching for the teachers and the students, and what are the problems of team teaching and the solutions. For answer those questions, the writer observed the teaching and learning English process at XII IPA class in three meetings. For the data collection technique, the writer used observatio interview, documentation, and questionnaire. The implementation of team teaching in SMA Negeri I Gedangan could be seen at three main jobs, they were planning of teaching and learning, conducting of teaching and learning, and evaluating the process and result of teaching and learning. The advantages of team teaching for the teachers and students were the teachers could complete each other about material practice, and media. The students could get more knowledge from two teachers or more. The disadvantages of team teaching for them were the teachers found the difficult to match their time and the students felt confuse when the teachers had different explanation and perception. The disadvantages of team teaching became the problems which had to find the solutions

Determination of the Antiferroquadrupolar Order Parameters in UPd3

By combining accurate heat capacity and X-ray resonant scattering results we have resolved the long standing question regarding the nature of the quadrupolar ordered phases in UPd_3. The order parameter of the highest temperature quadrupolar phase has been uniquely determined to be antiphase Q_{zx} in contrast to the previous conjecture of Q_{x^2-y^2} . The azimuthal dependence of the X-ray scattering intensity from the quadrupolar superlattice reflections indicates that the lower temperature phases are described by a superposition of order parameters. The heat capacity features associated with each of the phase transitions characterize their order, which imposes restrictions on the matrix elements of the quadrupolar operators.Comment: 4 pages, 5 figure

Possible Pairing Mechanisms of PuCoGa5_5 Superconductor

We examine possible pairing mechanisms of superconductivity in PuCoGa$_5$ based on spin-fluctuations or phonons as mediating bosons. We consider experimental data of specific heat C(T) and resistivity $\rho(T)$ as input to determine a consistent scattering boson with the superconducting transition temperature of 18.5K in PuCoGa$_5$. Irrespective to the type of boson, the characteristic boson frequency is found to be $\sim 150 K$ from the resistivity fitting. The spin fluctuation model is most consistent with the experimental resistivity, successfully explaining the anomalous temperature dependence ($\sim \frac{T^2}{150 K +T}$) at low temperatures as well as the saturation behavior at high temperatures. Assuming that the pairing state is non s-wave, the large residual resistivity $\rho_{imp} \sim 20 \mu \Omega cm \sim 120 K$ suggests that an ideally pure sample of PuCoGa$_5$ would have a maximum T$_c$ of 39 K.Comment: 6 pages, 5 figure