Large transient fault current test of an electrical roll ring

The space station uses precision rotary gimbals to provide for sun tracking of its photoelectric arrays. Electrical power, command signals and data are transferred across the gimbals by roll rings. Roll rings have been shown to be capable of highly efficient electrical transmission and long life, through tests conducted at the NASA Lewis Research Center and Honeywell's Satellite and Space Systems Division in Phoenix, AZ. Large potential fault currents inherent to the power system's DC distribution architecture, have brought about the need to evaluate the effects of large transient fault currents on roll rings. A test recently conducted at Lewis subjected a roll ring to a simulated worst case space station electrical fault. The system model used to obtain the fault profile is described, along with details of the reduced order circuit that was used to simulate the fault. Test results comparing roll ring performance before and after the fault are also presented

A parametric analysis of visual approaches for helicopters

A flight investigation was conducted to determine the characteristic shapes of the altitude, ground speed, and deceleration profiles of visual approaches for helicopters. Two hundred thirty-six visual approaches were flown from nine sets of initial conditions with four types of helicopters. Mathematical relationships were developed that describe the characteristic visual deceleration profiles. These mathematical relationships were expanded to develop equations which define the corresponding nominal ground speed, pitch attitude, pitch rate, and pitch acceleration profiles. Results are applicable to improved helicopter handling qualities in terminal area operations

Pengaruh Pengungkapan Corporate Social Responsibility Terhadap Profit Perusahaan Consumer Goods Di Indonesia Tahun 2010 - 2012

Isu mengenai Pengungkapan Corporate Social Responsibility (CSR) telah berkembang beberapa tahun terakhir ini dimana Perusahaan diwajibkan untuk melaporkan aktivitas sosialnya di dalam bentuk laporan tahunan atau sustainability reporting. Sehingga diharapkan adanya bentuk transparasi mengenai kinerja operasi Perusahaan agar Perusahaan tidak hanya memperhatikan profit semata namun memperhatikan kondisi lingkungan dan memberikan kontribusi untuk masyarakat.Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pengungkapan Corporate Social Responsibility terhadap profit Perusahaan. Sampel penelitian adalah 60 Perusahaan Consumer Goods pada tahun 2010 – 2012 yang terdaftar di Bursa Efek Indonesia. Variabel independent adalah pengungkapan dari kinerja ekonomi, lingkungan, hak asasi manusia, tenaga kerja, kemasyarakatan dan tanggung jawab produk yang diukur dengan menggunakan indeks pengungkapan menurut Global Reporting Iniative (GRI) yang digunakan sebagai dasar perhitungan nilai CSR. Variabel dependent adalah Net Profit Margin (NPM) sebagai ukuran profit Perusahaan. Penelitian ini menggunakan data sekunder yang dikumpulkan dari laporan tahunan yang berasal dari Bursa Efek Indonesia.Hasil penelitian menunjukkan bahwa pengungkapan kinerja lingkungan dan pengungkapan kinerja kemasyarakatan berpengaruh positif terhadap profit (NPM) Perusahaan consumer goods di Indonesia. Sedangkan pengungkapan kinerja tenaga kerja berpengaruh negatif terhadap profit (NPM) Perusahaan consumer goods di Indonesia

Flight investigation of cockpit-displayed traffic information utilizing coded symbology in an advanced operational environment

Traffic symbology was encoded to provide additional information concerning the traffic, which was displayed on the pilot's electronic horizontal situation indicators (EHSI). A research airplane representing an advanced operational environment was used to assess the benefit of coded traffic symbology in a realistic work-load environment. Traffic scenarios, involving both conflict-free and conflict situations, were employed. Subjective pilot commentary was obtained through the use of a questionnaire and extensive pilot debriefings. These results grouped conveniently under two categories: display factors and task performance. A major item under the display factor category was the problem of display clutter. The primary contributors to clutter were the use of large map-scale factors, the use of traffic data blocks, and the presentation of more than a few airplanes. In terms of task performance, the cockpit-displayed traffic information was found to provide excellent overall situation awareness. Additionally, mile separation prescribed during these tests

Studi Tentang Kerajinan Sulaman Benang Emas di Nagari Saniangbaka Kecamatan X Koto Singkarak Kabupaten Solok

Gold thread embroidery craft is one of the craft in Saniangbaka villages that have economic value and beauty value which has been handed down and done by women. The purpose of this study was to describe the shape of motifs of gold thread embroidery, materials used for gold thread embroidered, techniques of gold thread embroidery, and types of gold thread embroidery products. This study uses qualitative method. The type of data is primary and secondary data. The technique of collecting data through observation, interview and documentation. The data analysis technique which uses interactive model analysis that is related with subject matter is data reduction model, data presentation, and conclusion. The results of the study are: Shape of gold thread embroidery motifs derived from the naturalistic form of plants and animals, such as florals, leaves, twigs, chicken, bird, and geometric such as triangles, rectangles, circles, from then on stylized motifs into decorative ornament. Materials used are velvet, satin, gold embroidery threads, sewing machine thread, and needles for hand embroidery. Gold thread embroidery techniques in Saningbaka villages use pamedangan legged, namely gold thread laid on the surface of the fabric and embroidered motif followed by way of regular sewing thread pinned gold thread, gold thread embroidery characteristic in this Saniangbaka villages its motive is always full with gold threads, is not only the edge of motive, called the Or nu\u27e techniques. Gold thread embroidery products in Saniangbaka villages produced is for custom fixtures and traditional wedding, while products such as wall hangings, clothing, tablecloths, pillowcases seats, and souvenirs in the form of purses, bags and toys key is a special order from the buyer , is expected to yield gold thread embroidery is to improve the economy and can be preserved

Early flight test experience with Cockpit Displayed Traffic Information (CDTI)

Coded symbology, based on the results of early human factors studies, was displayed on the electronic horizontal situation indicator and flight tested on an advanced research aircraft in order to subject the coded traffic symbology to a realistic flight environment and to assess its value by means of a direct comparison with simple, uncoded traffic symbology. The tests consisted of 28 curved, decelerating approaches, flown by research-pilot flight crews. The traffic scenarios involved both conflict-free and blunder situations. Subjective pilot commentary was obtained through the use of a questionnaire and extensive pilot debriefing sessions. The results of these debriefing sessions group conveniently under either of two categories: display factors or task performance. A major item under the display factor category was the problem of display clutter. The primary contributors to clutter were the use of large map-scale factors, the use of traffic data blocks, and the presentation of more than a few aircraft. In terms of task performance, the cockpit displayed traffic information was found to provide excellent overall situation awareness

Jorge A. Swieca's contributions to quantum field theory in the 60s and 70s and their relevance in present research

After revisiting some high points of particle physics and QFT of the two decades from 1960 to 1980, I comment on the work by Jorge Andre Swieca. I explain how it fits into the quantum field theory during these two decades and draw attention to its relevance to the ongoing particle physics research. A particular aim of this article is to direct thr readers mindfulness to the relevance of what at the time of Swieca was called "the Schwinger Higgs screening mechanism". which, together with recent ideas which generalize the concept of gauge theories, has all the ingredients to revolutionize the issue of gauge theories and the standard model.Comment: 49 pages, expansion and actualization of text, improvement of formulations and addition of many references to be published in EPJH - Historical Perspectives on Contemporary Physic

An alternative to the gauge theoretic setting

The standard formulation of gauge theories results from the Lagrangian (functional integral) quantization of classical gauge theories. A more intrinsic qunantum theoretical access in the spirit of Wigner's representation theory shows that there is a fundamental clash between the pointlike localization of zero mass (vector, tensor) potentials and the Hilbert space (positivity, unitarity) structure of QT. The quantization approach has no other way than to stay with pointlike localization and sacrifice the Hilbert space whereas the approach build on the intrinsic quantum concept of modular localization keeps the Hilbert space and trades the conflict creating pointlike generation with the tightest consistent localization:: semiinfinite spacelike string localization. Whereas these potentials in the presence of interactions stay quite close to associated pointlike field strength, the interacting matter fields to which they are coupled bear the brunt of the nonlocal aspect in that they are string.generated in a way which cannot be undone by any differentiation. The new stringlike approach to gauge theory also revives the idea of a Schwinger-Higgs screening mechanism as a deeper and less metaphoric description of the Higgs spontaneous symmetry breaking and its accompanying tale about "God's particle" and its mass generation for all other particles.Comment: 26 page

A retrospective analysis of the change in anti-malarial treatment policy: Peru

<p>Abstract</p> <p>Background</p> <p>National malaria control programmes must deal with the complex process of changing national malaria treatment guidelines, often without guidance on the process of change. Selecting a replacement drug is only one issue in this process. There is a paucity of literature describing successful malaria treatment policy changes to help guide control programs through this process.</p> <p>Objectives</p> <p>To understand the wider context in which national malaria treatment guidelines were formulated in a specific country (Peru).</p> <p>Methods</p> <p>Using qualitative methods (individual and focus group interviews, stakeholder analysis and a review of documents), a retrospective analysis of the process of change in Peru's anti-malarial treatment policy from the early 1990's to 2003 was completed.</p> <p>Results</p> <p>The decision to change Peru's policies resulted from increasing levels of anti-malarial drug resistance, as well as complaints from providers that the drugs were no longer working. The context of the change occurred in a time in which Peru was changing national governments, which created extreme challenges in moving the change process forward. Peru utilized a number of key strategies successfully to ensure that policy change would occur. This included a) having the process directed by a group who shared a common interest in malaria and who had long-established social and professional networks among themselves, b) engaging in collaborative teamwork among nationals and between nationals and international collaborators, c) respect for and inclusion of district-level staff in all phases of the process, d) reliance on high levels of technical and scientific knowledge, e) use of standardized protocols to collect data, and f) transparency.</p> <p>Conclusion</p> <p>Although not perfectly or fully implemented by 2003, the change in malaria treatment policy in Peru occurred very quickly, as compared to other countries. They identified a problem, collected the data necessary to justify the change, utilized political will to their favor, approved the policy, and moved to improve malaria control in their country. As such, they offer an excellent example for other countries as they contemplate or embark on policy changes.</p

Lassa Fever in Post-Conflict Sierra Leone

Background: Lassa fever (LF), an often-fatal hemorrhagic disease caused by Lassa virus (LASV), is a major public health threat in West Africa. When the violent civil conflict in Sierra Leone (1991 to 2002) ended, an international consortium assisted in restoration of the LF program at Kenema Government Hospital (KGH) in an area with the world's highest incidence of the disease. Methodology/Principal Findings Clinical and laboratory records of patients presenting to the KGH Lassa Ward in the post-conflict period were organized electronically. Recombinant antigen-based LF immunoassays were used to assess LASV antigenemia and LASV-specific antibodies in patients who met criteria for suspected LF. KGH has been reestablished as a center for LF treatment and research, with over 500 suspected cases now presenting yearly. Higher case fatality rates (CFRs) in LF patients were observed compared to studies conducted prior to the civil conflict. Different criteria for defining LF stages and differences in sensitivity of assays likely account for these differences. The highest incidence of LF in Sierra Leone was observed during the dry season. LF cases were observed in ten of Sierra Leone's thirteen districts, with numerous cases from outside the traditional endemic zone. Deaths in patients presenting with LASV antigenemia were skewed towards individuals less than 29 years of age. Women self-reporting as pregnant were significantly overrepresented among LASV antigenemic patients. The CFR of ribavirin-treated patients presenting early in acute infection was lower than in untreated subjects. Conclusions/Significance: Lassa fever remains a major public health threat in Sierra Leone. Outreach activities should expand because LF may be more widespread in Sierra Leone than previously recognized. Enhanced case finding to ensure rapid diagnosis and treatment is imperative to reduce mortality. Even with ribavirin treatment, there was a high rate of fatalities underscoring the need to develop more effective and/or supplemental treatments for LF