Optimum Scheme for Insulation System in HV Generator Based on Electromagnetic Analysis

Electrical insulations are one of the basic parts of electrical machinery in any sizes and characteristics. Focusing on insulating, studies on the operation of industrial-electrical machinery came to the fact that the most important part of a machine is the Stator. This fact reveals the requirement for inspection of the electrical machine insulation along with the electromagnetic tensions. Therefore with respect to insulation system improvement of stator, the HV generator can be optimized. Dielectric parameters such as insulation thickness, spacing, material types, geometry of winding and slot are major design consideration. A very powerful method available to analyze electromagnetic performance is Finite Element Method (FEM) which is used in this paper. The analysis of various stator coil and slot configurations are used to design the better dielectric system to reduce electrical stresses in order to increase the power of generator in the same volume of core. These processes of optimization have been done according the proposed algorithm. In this algorithm the technical constraints have been considered. This paper describes the process used to perform classical design and improvement analysis of stator slot’s insulation with respect to objective function and constraints

The cranking formula and the spurious behaviour of the mass parameters

We discuss some aspects of the approach of the mass parameters by means of the simple cranking model. In particular, it is well known that the numerical application of this formula is often subject to ambiguities or contradictions. It is found that these problems are induced by the presence of two derivatives in the formula. To overcome these problems, we state a useful ansatz and we develop a number of simple arguments which tend to justify the removal of these terms. As soon as this is done, the formula becomes simpler and easier to interpret. In this respect, it is shown how the shell effects affect the mass parameters. A number of numerical tests help us in our conclusions.Comment: version 3 corrigendum of the ansatz of section V, corrigendum of the legend of Fig3. Submission = text file + 5 figure

Iranian Dietary Patterns and Risk of Colorectal Cancer

Background: Role of diet on colorectal cancer (CRC) has been considered in terms of single foods and nutrients, but less frequently in terms of dietary patterns in Iran. The objective of this study was to determine the association between Iranian dietary patterns and CRC. Methods: This case-control study was conducted in four hospitals in Tabriz City of Iran including 414 participants aged 35-75 years: 207 cases with CRC confirmed by pathology and colonoscopy findings were selected and 207 controls free of neoplastic conditions and diet-related chronic diseases (from the same hospital at the same period for the cases). Dietary data were assessed using a 123-item semi-quantitative food frequency questionnaire. Two dietary patterns were found by using of Principal Component Analysis (PCA) method;"Healthy pattern" and "Iranian pattern". Multivariate logistic regression analysis was used to estimate adjusted odds ratios (OR) for relationship between dietary patterns and colorectal cancer. Results: After adjusting for confounding factors, the Iranian dietary pattern was significantly associated with an increased odds of colorectal cancer (OR=1.46; 95 Confidenec Interval (CI)=1.05-2.19) while a reduced odds of colorectal cancer was observed with the Healthy dietary pattern (OR=0.18; 95 CI=0.091-0.47). Conclusion: Iranian dietary pattern (IDP) seems to increase the odds of colorectal cancer and protective effect of Healthy dietary pattern

High-Performance Atomically-Thin Room-Temperature NO2 Sensor.

The development of room-temperature sensing devices for detecting small concentrations of molecular species is imperative for a wide range of low-power sensor applications. We demonstrate a room-temperature, highly sensitive, selective, stable, and reversible chemical sensor based on a monolayer of the transition-metal dichalcogenide Re0.5Nb0.5S2. The sensing device exhibits a thickness-dependent carrier type, and upon exposure to NO2 molecules, its electrical resistance considerably increases or decreases depending on the layer number. The sensor is selective to NO2 with only minimal response to other gases such as NH3, CH2O, and CO2. In the presence of humidity, not only are the sensing properties not deteriorated but also the monolayer sensor shows complete reversibility with fast recovery at room temperature. We present a theoretical analysis of the sensing platform and identify the atomically sensitive transduction mechanism

Low-lying quadrupole collective states of the light and medium Xenon isotopes

Collective low lying levels of light and medium Xenon isotopes are deduced from the Generalized Bohr Hamiltonian (GBH). The microscopic seven functions entering into the GBH are built from a deformed mean field of the Woods-Saxon type. Theoretical spectra are found to be close to the ones of the experimental data taking into account that the calculations are completely microscopic, that is to say, without any fitting of parameters.Comment: 8 pages, 4 figures, 1 tabl

Kondisi Sosial Ekonomi Petani Sawah Tadah Hujan Desa Jati Mulyo Tahun 2016

This study aims to study about Socio-Economic Conditions Farmers rain fed in the village Jati Mulyo Jati Agung District South Lampung Regency in 2016. This research using methods deskriptif. A population as many as 540 farmers rain fed, take of sample 10% (54KK). Data collection to technique interview structured, the observation, and dokumentation. Analisis data using spasial approach as a basis of interpretation and diskriptif data on reseacrh. The results showed: (1) The average farmers considered in produktive age, (2) The average farmers low educated, (3) The average farmers have 3 son, (4) The average farmers have 5 people, (5) Farmers have average land ownership of rain fed in Jati Mulyo village is 0,48 ha, (6) The income of farmers is low with income with average Rp 9.792.592,6, (7) The average income from side jobs Rp 3.586.667.Penelitian ini bertujuan mengkaji tentang Keadaan Sosial Ekonomi Petani Sawah Tadah Hujan di Desa Jati Mulyo Kecamatan Jati Agung Kabupaten Lampung Selatan Tahun 2016.Penelitian ini menggunakan metode deskriptif. Jumlah populasi sebanyak 540 petani sawah tadah hujan, diambil sampel 10% (54KK). Pengumpulan data degan teknik wawancara terstruktur, observasi, dan dokumentasi. Analisis data dengan pendekatan keruangan, sebagai dasar interpretasi dan deskripsi dalam membuat laporan penelitian. Hasil penelitian menunjukkan: (1) Rata-rata petani tergolong dalam usia produktif, (2) Rata-rata petani berpendidikan rendah, (3) Rata-rata petani memiliki 3 anak, (4) Rata-rata petani memiliki 5 orang tanggungan dalam satu keluarga, (5) Petani memiliki rata-rata luas lahan sawah tadah hujan di Desa Jati Mulyo 0,48 ha, (6) Petani memiliki pendapatan yang tergolong rendah dengan penghasilan rata-rata Rp 9.792.592,6, (7) Rata-rata pendapatan dari pekerjaan sampingan sebesar Rp 3.586.667

Multiplikasi Tunas in Vitro Berdasarkan Jenis Eksplan Pada Enam Genotipe Tebu (Saccharum Officinarum L.) / the in Vitro Shoots Multiplication Based on Explants Type on Six Sugarcane (Saccharum Officinarum L.) Genotypes

Sugarcane (Saccharum officinarum L.) is propagated vegetatively using stem cuttings. Plant propagation can utilize tissue culture techniques because it offers a faster propagation time than conventional methods, need less mother plants and labor, planting is not influenced by the season, and produce pathogen-free guaranteed seedlings. This study aims to determine the optimal type of explant for shoot multiplication of six sugarcane genotypes. The study was conducted at the Tissue Culture Laboratory, Plant Cell Tissue Biology Group, Indonesian Center for Agricultural Biotechnology and Genetic Resources Research and Development, Bogor from May 2015 to June 2016. Explants from six genotypes of sugarcane (PS 881, PS 865, GMP 3, TK 386, PSJK 922, and PS 862) were grown on regeneration media based on explant type treatments (one shoot, two shoots, and three shoots per explant) that were subcultured every three weeks. Subcultures were conducted up to nine times, then observations of survival rate, shoot regeneration rate, number of new shoots, shoot height were made on the third, sixth, and ninth subcultures. The results showed interaction between genotypes and explant type were not significantly different except to the shoot regeneration in the sixth subculture. Each genotype had different multiplication rate, and PSJK 922 produced the lowest survival explant, shoot regeneration, and number of new shoot in the ninth subculture. Two shoots explant were the optimal type of explant for in vitro shoots multiplication with 4 new shoots per explant in the ninth subculture