Application of the generalized reduced gradient method to conceptual aircraft design

The complete aircraft design process can be broken into three phases of increasing depth: conceptual design, preliminary design, and detail design. Conceptual design consists primarily of developing general arrangements and selecting the configuration that optimally satisfies all mission requirements. The result of the conceptual phase is a conceptual baseline configuration that serves as the starting point for the preliminary design phase. The conceptual design of an aircraft involves a complex trade-off of many independent variables that must be investigated before deciding upon the basic configuration. Some of these variables are discrete (number of engines), some represent different configurations (canard vs conventional tail) and some may represent incorporation of new technologies (aluminum vs composite materials). At Lockheed-Georgia, the sizing program is known as GASP (Generalized Aircraft Sizing Program). GASP is a large program containing analysis modules covering the many different disciplines involved fin defining the aricraft, such as aerodynamics, structures, stability and control, mission performance, and cost. These analysis modules provide first-level estimates the aircraft properties that are derived from handbook, experimental, and historical sources

Single Transverse-Spin Asymmetries in Drell-Yan Processes

The asymmetry in the angular distribution of Drell--Yan dilepton pairs generated in collisions where just one nucleon is transversely polarised has been examined in the literature with a variety of results, mainly differing by factors of two. We re-evaluate the asymmetry via twist-3 contributions in collinear factorisation. In order to allow complete and in-depth comparison with existing calculations, we supply all calculational details.Comment: 8 pages, 3 figures, final version, accepted for publication in Eur. Phys. J.

Analisis Penerapan Standar Operasional Prosedur (Sop) Di Departemen Marketing Dan Hrd PT Cahaya Indo Persada Artikel Ilmiah Jurnal Agora

Penelitian ini bertujuan untuk mengetahui penerapan standar operasional prosedur (SOP) yang terjadi pada departemen marketing dan HRD di PT Cahaya Indo Persada. Jenis penelitian adalah kuliatatif dengan mengacu pada 7 hal pokok dalam SOP yang meliputi efisiensi, konsisten, meminimalisasi kesalahan, penyelesaiaan masalah, dan batasan pertahanan. Informan penelitian sebanyak 4 orang yaitu: manajer HRD, manajer marketing dan 2 karyawan marketing dan HRD. Teknik pengumpulan data melalui wawancara. Hasil analisis menunjukan bahwa karyawan departemen marketing dan HRD telah menerapkan SOP yang dibuat Perusahaan. adapun tentang hal pokok dalam SOP departemen marketing dan HRD memiliki beberapa kekurangan pada bagian efisiensi dalamSOP marketing. Serta terdapat kekurangan pada bagian penyelesaiaan masalah, perlindungan tenaga kerja dan peta kerja pada SOP departemen marketing dan HRD

Polymer chain in a quenched random medium: slow dynamics and ergodicity breaking

The Langevin dynamics of a self - interacting chain embedded in a quenched random medium is investigated by making use of the generating functional method and one - loop (Hartree) approximation. We have shown how this intrinsic disorder causes different dynamical regimes. Namely, within the Rouse characteristic time interval the anomalous diffusion shows up. The corresponding subdiffusional dynamical exponents have been explicitly calculated and thoroughly discussed. For the larger time interval the disorder drives the center of mass of the chain to a trap or frozen state provided that the Harris parameter, $(\Delta/b^d) N^{2 - \nu d} \ge 1$, where $\Delta$ is a disorder strength, $b$ is a Kuhnian segment length, $N$ is a chain length and $\nu$ is the Flory exponent. We have derived the general equation for the non - ergodicity function $f(p)$ which characterizes the amplitude of frozen Rouse modes with an index $p = 2\pi j/N$. The numerical solution of this equation has been implemented and shown that the different Rouse modes freeze up at the same critical disorder strength $\Delta_c \sim N^{-\gamma}$ where the exponent $\gamma \approx 0.25$ and does not depend from the solvent quality.Comment: 17 pages, 6 figures, submitted to EPJB (condensed matter

A supersymmetric matrix model: II. Exploring higher-fermion-number sectors

Continuing our previous analysis of a supersymmetric quantum-mechanical matrix model, we study in detail the properties of its sectors with fermion number F=2 and 3. We confirm all previous expectations, modulo the appearance, at strong coupling, of {\it two} new bosonic ground states causing a further jump in Witten's index across a previously identified critical 't Hooft coupling $\lambda_c$. We are able to elucidate the origin of these new SUSY vacua by considering the $\lambda \to \infty$ limit and a strong coupling expansion around it.Comment: 14 pages, 4 figure

Perancangan Tempat Persemayaman di Surabaya

Proyek merupakan fasilitas persemayaman dan colombarium di Surabaya. Dualisme hidup dan mati yang diangkat dari petikan kalimat dari filosofis Lao Tzu menjadi dasar dari konsep perancangan, dan diimplementasikan pada penataan ruang sehingga pengguna fasilitas ini diharapkan dapat merenungi makna kematian lebih dalam. Fasilitas ini terbagi jadi dua fungsi utama yaitu tempat persemayaman dan kolombarium atau rumah abu

Effect of stretching on the ballistic conductance of Au nanocontacts in presence of CO: a density functional study

CO adsorption on an Au monatomic chain is studied within density functional theory in nanocontact geometries as a function of the contact stretching. We compare the bridge and atop adsorption sites of CO, finding that the bridge site is energetically favored at all strains studied here. Atop adsorption gives rise to an almost complete suppression of the ballistic conductance of the nanocontact, while adsorption at the bridge site results in a conductance value close to 0.6 G0, in agreement with previous experimental data. We show that only the bridge site can qualitatively account for the evolution of the conductance as a function of the contact stretching observed in the experimental conductance traces. The numerical discrepancy between the theoretical and experimental conductance slopes is rationalized through a simple model for the elastic response of the metallic leads. We also verify that our conductance values are not affected by the specific choice of the nanocontact geometry by comparing two different atomistic models for the tips

Correlation energy in a spin polarized two dimensional electron liquid in the high density limit

We have obtained an analytic expression for the ring diagrams contribution to the correlation energy of a two dimensional electron liquid as a function of the uniform fractional spin polarization. Our results can be used to improve on the interpolation formulas which represent the basic ingredient for the constructions of modern spin-density functionals in two dimensions.Comment: 3 pages, 1 figur