Pengembangan Desain Jam Tangan Analog dengan Prosentase sebagai Penunjuk Waktu

Waktu merupakan fenomena yang abstrak namun selalu dirasakan melalui Perubahan dunia fisik di sekitar kita. Penjelasan atas waktu dilakukan mulai dari pemaknaan lewat bahasa sampai ke penciptaan satuan dan alat ukurnya. Namun hal ini berakibat fenomena waktu menjadi terbatas pada satuan-satuan tersebut. Kebiasaan beraktivitas masyarakat juga semakin mengurangi apresiasi atas waktu. Proyek Tugas Akhir ini bertujuan untuk mencari cara penjelasan waktu yang dapat membuat kita kembali mempertimbangkan mengenai waktu. Penjelasan waktu yang lebih efektif namun tetap familiar dapat menjadi cara agar kita lebih mengapresiasi waktu

Proposal for an optical laser producing light at half the Josephson frequency

We describe a superconducting device capable of producing laser light in the visible range at half of the Josephson generation frequency with the optical phase of the light locked to the superconducting phase difference. It consists of two single-level quantum dots embedded into a p-n semiconducting heterostructure and surrounded by a cavity supporting a resonant optical mode. We study decoherence and spontaneous switching in the device.Comment: 4+3 pages, 3+1 figure

Simulation of Asymptotically AdS5 Spacetimes with a Generalized Harmonic Evolution Scheme

Motivated by the gauge/gravity duality, we introduce a numerical scheme based on generalized harmonic evolution to solve the Einstein field equations on asymptotically anti-de Sitter (AdS) spacetimes. We work in global AdS5, which can be described by the (t,r,\chi,\theta,\phi) spherical coordinates adapted to the R{\times}S3 boundary. We focus on solutions that preserve an SO(3) symmetry that acts to rotate the 2-spheres parametrized by \theta,\phi. In the boundary conformal field theory (CFT), the way in which this symmetry manifests itself hinges on the way we choose to embed Minkowski space in R{\times}S3. We present results from an ongoing study of prompt black hole formation via scalar field collapse, and explore the subsequent quasi-normal ringdown. Beginning with initial data characterized by highly distorted apparent horizon geometries, the metrics quickly evolve, via quasi-normal ringdown, to equilibrium static black hole solutions at late times. The lowest angular number quasi-normal modes are consistent with the linear modes previously found in perturbative studies, whereas the higher angular modes are a combination of linear modes and of harmonics arising from non-linear mode-coupling. We extract the stress energy tensor of the dual CFT on the boundary, and find that despite being highly inhomogeneous initially, it nevertheless evolves from the outset in a manner that is consistent with a thermalized N=4 SYM fluid. As a first step towards closer contact with relativistic heavy ion collision physics, we map this solution to a Minkowski piece of the R{\times}S3 boundary, and obtain a corresponding fluid flow in Minkowski space

Study of Optimization of LInear Velocity of Rotary Blade and Tractor Forward Speed Ratio on Soil Pudding of Wet Field Rice

The study on optimization of linear velocity of rotary blade and tractor forward speed ratio oil soil puddling of wetjeld rice was carried out in order to find the relationship between linear velocity of rotary blade and tractor forward speed ratio (u-v ratio) and the number of tractor's pass versus soil puddling index and tractor wheel slip during the soil puddling, and todetermine the optimum u-v ratio for rice wetjeldpreparation with certain soil classijication and condition and also with certain two wheel tractor and rotary tiller.The result, using two types of two wheel tractors and rotary tillers, showed that soil puddling was extremely afSected by puddling pass Pequency. The puddling index increased with the increasing of puddling pass prequency until the soil became puddled soil, were 0. 18 up to 0.64 forjeld test I and 0.17up to 0.67 for field test 11 in average

Manajemen Rantai Pasokan Pada E-commerce Industri Makanan Ringan Kwt An-naba YOGYAKARTA

Usaha makanan ringan (snack) memiliki potensi cukup besar dalam meraup keuntungan, namun tidak sedikit pula pelaku USAha tersebut mengalami kerugian dikarenakan strategi pemasaran yang kurang tepat. Permasalahan yang banyak terjadi pada industri makanan ringan, khususnya di KWT (Kelompok Wanita Tani) An Naba antara lain adalah faktor pangsa pasar atau kemampuan mengakses pasar yang lebih luas, keterbatasan informasi terkait dengan segmen pasar, kesulitan mendapatkan pasokan bahan baku dan masalah promosi. Untuk mengatasi permasalahan tersebut diatas, pada penelitian ini akan dibangun e-commerce dengan manajemen rantai pasokan (SCM, Supply Chain Management) yang merupakan sistem terintegrasi yang menangani hubungan stakeholders pada USAha makanan ringan

Persepsi Pejalan Kaki Terhadap Keamanan Dan Kenyamanan Jalur Trotoar Di Pusat Kota Amurang

Pedestrian dalam penelitian kali ini akan fokus pada trotoar di jalan Arteri Pusat Kota Amurang. Trotoar yang ada terlihat di buat tanpa memperhitungkan faktor keamanan dan Kenyamanan, sehingga pejalan kaki seringkali tidak memanfaatkan fasilitas ini, berdasarkan amatan awal didapati pejalan kaki lebih memanfaatkan bagian bahu jalan untuk berjalan, terlihat juga ada yang terjatuh diatas trotoar, dan juga banyak pejalan kaki berdesak-desakan di atas trotoar sehingga kesannya sempit atau kurang lebar, sehingga ketika trotoar ini difungsikan rasa aman dan nyaman dalam pemanfaatannya tidak dirasakan oleh pejalan kaki. Penelitian ini termasuk dalam penelitian evaluative dengan metode yang diterapkan dalam penelitian ini adalah kombinasi dari metode kualitatif dan kuantitatif. Pengambilan data dan identifikasi dilakukan melalui observasi, foto/dokumentasi lapangan dan penyebaran kuisioner. Data kuantitatif di analisis dengan menggunakan scoring, pembobotan dan prosentase, yang dijelaskan secara deskriptif. Evaluasi terhadap trotoar yang ada ternyata tidak sesuai dengan standart yang disyaratkan dan selaras juga dengan persepsi masyarakat terhadap kondisi trotoar tersebut ialah kurang aman dan tidak nyaman. Dapat disimpulkan dalam penelitian ini : (1) trotoar pada jalan arteri kurang aman dan tidak nyaman, (2) persepsi masyarakat terhadap trotoar di jalan arteri pada segmen bagian kiri dan bagian kanan ini memperlihatkan bahwa kondisi trotoar kurang aman dan tidak nyaman. Hasil evaluasi sejalan dengan persepsi masyarakat

Ariel - Volume 10 Number 5

Executive Editors Madalyn Schaefgen David Reich Business Manager David Reich News Editors Medical College Edward Zurad CAHS John Guardiani World Mark Zwanger Features Editors Meg Trexler Jim O\u27Brien Editorials Editor Jeffrey Banyas Photography and Sports Editor Stuart Singer Commons Editor Brenda Peterso

Towards the Final Fate of an Unstable Black String

Black strings, one class of higher dimensional analogues of black holes, were shown to be unstable to long wavelength perturbations by Gregory and Laflamme in 1992, via a linear analysis. We revisit the problem through numerical solution of the full equations of motion, and focus on trying to determine the end-state of a perturbed, unstable black string. Our preliminary results show that such a spacetime tends towards a solution resembling a sequence of spherical black holes connected by thin black strings, at least at intermediate times. However, our code fails then, primarily due to large gradients that develop in metric functions, as the coordinate system we use is not well adapted to the nature of the unfolding solution. We are thus unable to determine how close the solution we see is to the final end-state, though we do observe rich dynamical behavior of the system in the intermediate stages.Comment: 17 pages, 7 figure

Comparisons of binary black hole merger waveforms

This a particularly exciting time for gravitational wave physics. Ground-based gravitational wave detectors are now operating at a sensitivity such that gravitational radiation may soon be directly detected, and recently several groups have independently made significant breakthroughs that have finally enabled numerical relativists to solve the Einstein field equations for coalescing black-hole binaries, a key source of gravitational radiation. The numerical relativity community is now in the position to begin providing simulated merger waveforms for use by the data analysis community, and it is therefore very important that we provide ways to validate the results produced by various numerical approaches. Here, we present a simple comparison of the waveforms produced by two very different, but equally successful approaches--the generalized harmonic gauge and the moving puncture methods. We compare waveforms of equal-mass black hole mergers with minimal or vanishing spins. The results show exceptional agreement for the final burst of radiation, with some differences attributable to small spins on the black holes in one case.Comment: Revtex 4, 5 pages. Published versio

Simulation of Binary Black Hole Spacetimes with a Harmonic Evolution Scheme

A numerical solution scheme for the Einstein field equations based on generalized harmonic coordinates is described, focusing on details not provided before in the literature and that are of particular relevance to the binary black hole problem. This includes demonstrations of the effectiveness of constraint damping, and how the time slicing can be controlled through the use of a source function evolution equation. In addition, some results from an ongoing study of binary black hole coalescence, where the black holes are formed via scalar field collapse, are shown. Scalar fields offer a convenient route to exploring certain aspects of black hole interactions, and one interesting, though tentative suggestion from this early study is that behavior reminiscent of "zoom-whirl" orbits in particle trajectories is also present in the merger of equal mass, non-spinning binaries, with appropriately fine-tuned initial conditions.Comment: 16 pages, 14 figures; replaced with published versio