Pengaruh Model Contextual Teaching and Learning Terhadap Pemahaman Konsep Dan Kemampuan Pemecahan Masalah Dalam Pembelajaran IPA-Fisika Di MTs Negeri Negara

The purpose of this research is to analyze the differences in understanding concepts and problem solving ability of studying physics among the students with CTL model and conventional learning model. This research used the design of "The posttest only control group design". The population of this research was eighth grade students of MTs in the academic year of 2012/2013. The sample of this research was two same level classes, as an experimental class with CTL model and a control class with Conventional model.The data of the conceptual understanding and problem solving ability gained through the student essay test. The results were analyzed by descriptive and MANOVA one lane.The results of this research showed that: (1) there was a significant differences on understanding concept and problem solving ability of the students who learned with CTL and MPK (F = 40,792; p < 0,05). (2) There were differences on understanding concept between the students who learned with CTL and MPK (F = 36.053, p <0.05), and (3) there were significant differences on problem solving ability between the students who learned with CTL and MPK (F = 62.706, p <0,05). Therefore, Scheffe test showed that the CTL model was better than the MPK

Large scale in-situ experiments on sealing constructions in underground disposal facilities for radioactive wastes -examples of recent BfS-and GRS-activities

Abstract: This paper shows examples of in-situ constructions and laboratory tests that have been designed and implemented by BfS und GRS in order to demonstrate the technical feasibility of special constructions for the sealing of drifts and shafts in different salt formations. Since a direct verification of the long-term functionality (for times scales envisaged in long-term safety assessments) of such constructions is often not possible, an overall understanding of the main chemical and physical processes involved needs to be developed. Such an understanding is required in order to extrapolate the evolution of a sealing system with a sufficient degree of reliability. Laboratory tests and large-scale in-situ tests are necessary and integral parts of the procedures for enhancing the process understanding. Based on a safety case, BfS has developed a robust decommissioning concept for the closure of the low-and intermediate-level waste disposal facility Morsleben (ERAM) which also takes into account the retention of radionuclides by combined effects of different sealing components. GRS has contributed to this concept with laboratory tests and modelling of the long-term behaviour of the sealing material "Salt concrete" foreseen for the sealing constructions in Morsleben. Salt concrete is based on the cement Portlandite i.e., on CaO. Furthermore GRS has also investigated the MgO based "Sorel concrete" employed by BfS for the Asse project. The chemical corrosion path and the subsequent permeability changes for both concretes have been investigated with test procedures developed in the GRS laboratory. GRS has also developed and tested in laboratory and in-situ experiments a new Self-Sealing material "Selbst Verheilender Versatz -SVV" (SVV, German for Self Sealing Backfill) which is able to achieve an instantaneous and long-lasting permeability reduction within the complex system consisting of the sealing construction and the Excavation Disturbed Zone (EDZ) upon brine intrusion. The presentation demonstrates details of the concepts and highlights results from the in-situ experiments of BfS in Morsleben and the preceding GRS laboratory and in-situ tests

Determination of conduction and valence band electronic structure of anatase and rutile TiO 2

Electronic structures of rutile and anatase polymorph of TiO2 were determined by resonant inelastic X-ray scattering measurements and FEFF9.0 calculations. Difference between crystalline structures led to shifts in the rutile Ti d-band to lower energy with respect to anatase, i.e., decrease in band gap. Anatase possesses localized states located in the band gap where electrons can be trapped, which are almost absent in the rutile structure. This could well explain the reported longer lifetimes in anatase. It was revealed that HR-XAS is insufficient to study in-depth unoccupied states of investigated materials because it overlooks the shallow traps. Graphical Abstract The resonant X-ray emission spectroscopy around Ti k-edge was applied to probe local electronic structure of TiO2 rutile and anatase. By measuring 1s→3d excitation and 3p→1s decay channel, differences between localized and delocalized orbitals were determined. The 3d pre-edge structures were compared with ab initio multiple scattering simulations

Assessing the oxidation states and structural stability of the Ce analogue of brannerite

NSERCThe Ce‐containing analogue of brannerite (ie, UTi2O6) was previously considered to be stoichio- metric (ie, CeTi2O6); however, it has recently been determined that the material is O deficient. This oxygen‐deficient material has been suggested to be charged balanced by the presence of a minor concentration of Ce3+ or by the A‐site being cation deficient with the Ce oxidation state being 4+. A variety of Ti‐containing oxides (including brannerite) have been investigated as potential nuclear wasteforms, and it is necessary to understand the electronic structure of a proposed nuclear wasteform material as well as how the structure responds to radiation from incorporated waste elements. The radiation resistance of a material can be simulated by ion implantation. The objective of this study was to confirm the Ce oxidation state in the cation‐ and oxygen‐deficient material (ie, Ce0.94Ti2O6 − δ) and to determine how radiation damage affects this material. X‐ray photoelectron spectroscopy (XPS) and X‐ray absorption near‐edge spectros- copy were used to study Ce0.94Ti2O6 − δ before and after being implanted with 2 MeV Au− ions. Analysis of the Ce 3d XPS spectra from the as‐synthesized samples by using a previously developed fitting method has unequivocally shown that Ce adopts both 4+ (major) and 3+ (minor) oxidation states, which was confirmed by examination of magnetic susceptibility data. Analysis of XPS and X‐ray absorption near‐edge spectroscopy spectra from ion‐implanted materials showed that both Ce and Ti were reduced because of radiation damage and that the local coordination environments of the cations are greatly affected by radiation damage

Die letzte Maske : Mimodrama in 3 Bildern; (op. 65)

von Kurt Münzer. Musik von Wilh. Mauke[Textbuch

Der spanische Erbfolgekrieg und der Churfürst Joseph Clemens von Cöln

DER SPANISCHE ERBFOLGEKRIEG UND DER CHURFÜRST JOSEPH CLEMENS VON CÖLN Der spanische Erbfolgekrieg und der Churfürst Joseph Clemens von Cöln ([i]) Einband ( - ) Titelseite ([i]) Vorwort ([iii]) Inhalt (vii) Erstes Kapitel (1) Zweites Kapitel (20) Drittes Kapitel (38) Viertes Kapitel (52) Fünftes Kapitel (89) Sechstes Kapitel (108) Siebentes Kapitel (129) Achtes Kapitel (142) Neuntes Kapitel (160) Zehntes Kapitel (185) Eilftes Kapitel (196) Zwölftes Kapitel (220) Dreizehntes Kapitel (242) Vierzehntes Kapitel (257) Dokumente und Briefe ([I]) N. 1 - N. 20 ([III]) N. 21 - N. 40 (XXXIV) N. 41 - N. 60 (LII) N. 61 - N. 80 (LXVI) N. 81 - N. 100 (LXXXIV) N. 101 - N. 120 (C) N. 121 - N. 140 (CXVII) N. 141 - N. 160 (CXXXIII) N. 161 - N. 180 (CXLVIII) N. 181 - N. 200 (CLXVIII) N. 201 - N. 220 (CLXXXV) N. 221 - N. 237 (CCVI) Druckfehler (CCXXXII