Strategi Pengembangan Kota Magelang sebagai Kawasan Andalan di Provinsi Jawa Tengah

This research aims to determine the classification of economics structure and the leading sectors of Magelang. The analysis of the research employs Klassen's Tipology, Location Quotient and SWOT. The results show that the city of Magelang is included in the advanced and fast-growing regions with high economic growth and high per capita income. Location Quotient (LQ) shows all secondary and tertiary sectors are included in the leading sectors, while agricultural sector, mining sector and manufacturing sector are not included in the leading sector. Based on SWOT analysis, there are leading sectors that needs to be improved to persuade the better economic condition in the main area of Magelang city, by taking action some possible development strategies, such as, improving the base sector's products by utilizing advanced technology, maximizing the realization of investment and maximizing the sale of leading sector products as well as creative industry products. Another possible startegies are creating a conducive business environment and improving the competitiveness of the regional economy

Capacitive mixing for the extraction of energy from salinity differences: Survey of experimental results and electrochemical models

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PENGEMBANGAN MEDIA PEMBELAJARAN MATEMATIKA BERBENTUKVIDEO DENGAN PENDEKATAN REALISTIC MATHEMATIC EDUCATION (RME) PADA MATA KULIAH MATEMATIKA SEKOLAH 2

Abstract: Mathematical learning media in the form of videos with a Realistic Mathematic Education (RME) approach was developed aimed at overcoming the problems experienced by mathematics education students in teaching school 2 mathematics courses which are compulsory subjects. In addition, this learning media in the form of videos is expected to increase students' learning motivation towards school 2 mathematics courses using science and technology. This type of research is Research and Development (R & D) research using the Borg & Gall development model. The stages carried out in this study were (1) initial research and data collection; (2) planning; (3) product draft development; (4) initial field trial; (5) revise the results of the trial; (6) field trials; (7) product improvement resulting from field tests; (8) field implementation test; (9) improvement of the final product; (10) dissemination and implementation. The data collection technique of this study uses the expert team validation sheet and user response questionnaire. The research data analysis used 2 analyzes namely descriptive statistical analysis and qualitative descriptive analysis. The results of the research that have been conducted show that the mathematics learning media in the form of videos with the Realistic Mathematic Education (RME) approach in school 2 mathematics courses are appropriate to be used by lecturers and students

Binary Collisions and the Slingshot Effect

We derive the equations for the gravity assist manoeuvre in the general 2D case without the constraints of circular planetary orbits or widely different masses as assumed by Broucke, and obtain the slingshot conditions and maximum energy gain for arbitrary mass ratios of two colliding rigid bodies. Using the geometric view developed in an earlier paper by the authors the possible trajectories are computed for both attractive or repulsive interactions yielding a further insight on the slingshot mechanics and its parametrization. The general slingshot manoeuvre for arbitrary masses is explained as a particular case of the possible outcomes of attractive or repulsive binary collisions, and the correlation between asymptotic information and orbital parameters is obtained in general.Comment: 12 pages, 7 figures, accepted for publication Dec'07, Celestial Mechanics and Dynamical Astronom

Orbit Determination of Close Binary Systems using Lucky Imaging

We present relative positions of visual binaries observed during 2009 with the FastCam "lucky-imaging" camera at the 1.5-m Carlos Sanchez Telescope (TCS) at the Observatorio del Teide. We obtained 424 CCD observations (averaged in 198 mean relative positions) of 157 binaries with angular separations in the range 0.14-15.40", with a median separation of 0.51". For a given system, each CCD image represents the sum of the best 10-25% images from 1000-5000 short-exposure frames. Derived internal errors were 7 mas in r and 1.2^{\circ} (9 mas) in q. When comparing to systems with very well-known orbits, we find that the rms deviation in r residuals is 23 mas, while the rms deviation in q residuals is 0.73 deg/r. We confirmed 18 Hipparcos binaries and we report new companions to BVD 36 A and J 621 B. For binaries with preliminary orbital parameters, the relative radial velocity was estimated as well. We also present four new revised orbits computed for LDS 873, BU 627 A-BC, BU 628 and HO 197 AB. This work is the first results on visual binaries using the FastCam lucky-imaging camera.Comment: 23 pages, 10 figures, 14 tables, accepted August 18th, 2011, to be published in MNRA

Self-assembly of gold supraparticles with crystallographically aligned and strongly coupled nanoparticle building blocks for SERS and photothermal therapy

A new method is introduced for self-assembling citrate-capped gold nanoparticles into supraparticles with crystallographically aligned building blocks. It consists in confining gold nanoparticles inside a cellulos acetate membrane. The constituent nanoparticles are in close contact in the superstructure, and therefore generate hot spots leading to intense SERS signals. They also generate more plasmonic heat than the nanoparticle building blocks. The supraparticles are internalized by cells and show low cytotoxicity, but can kill cancer cells when irradiated with a laser. This, along with the improved plasmonic properties arising from their assembly, makes the gold supraparticles promising materials for applications in bioimaging and nanomedicine

Shear Modulus of an Elastic Solid under External Pressure as a function of Temperature: The case of Helium

The energy of a dislocation loop in a continuum elastic solid under pressure is considered within the framework of classical mechanics. For a circular loop, this is a function with a maximum at pressures that are well within reach of experimental conditions for solid helium suggesting, in this case, that dislocation loops can be generated by a pressure-assisted thermally activated process. It is also pointed out that pinned dislocations segments can alter the shear response of solid helium, by an amount consistent with current measurements, without any unpinning.Comment: 5 pages, 3 figure