The Effect of Film Forming Agents in a Size Solution on Silicone Holdout

In the production c\u3ef base papers for silicone coating, one of the most important variables is the holdout capability of the \u27 base sheet. The holdout is primarily affected by the surface characteristics of the sheet relating to the smoothness and surface structure. An experiment was designed to look at the effects of several different commercial film forming agents in a standard size solution on the holdout properties of the sheet. A laboratory size press coater was assembled and used for application of the size solutions. After supercalendering, the sheets were silicone coated with an aqueous silicone solution and then tested for release properties. Results show that CMC and Kelgin provide the best release properties. By evaluation of both physical and financial properties, the use of CMC would be recommended

Hubungan Karakteristik dengan Perilaku Seksual Anak Jalanan di Kota Makassar

Pada umumnya perilaku seksual yang dilakukan oleh anak jalanan muncul karena adanya rasa ingin tahu yang besar dan adanya dorongan untuk mencoba pengalaman baru di masa remaja. Penelitian ini bertujuan untuk mengetahui hubungan karakteristik dengan perilaku seksual anak jalanan di Kota Makasar. Penelitian ini menggunakan rancangan cross sectional study. Populasi adalah semua anak jalanan di Kota Makassar berjumlah 500 anak sampai September 2013. Sampel merupakan sebagian dari anak jalanan yang diperoleh dengan metodeaccidental sampling selama penelitian berlangsung, sebanyak 212 responden. Data primer dikumpulkan dengan teknik wawancara menggunakan kuesioner. Data dianalisis secara univariat dan bivariat menggunakan uji chi-square yang berguna untuk menguji hubungan atau pengaruh dua buah variabel nominal. Hasil penelitian menunjukkanterdapat hubungan antara umur (p=0,001;p=0,023), aktivitas (p=0,029;p=0,000), hubungan dengan orang tua (p=0,012;p=0,006) dan tingkat ketaatan beragama (p=0,000;p=0,000) dengan perilaku seksual anak jalanan di Kota Makassar. Sedangkan 3 (tiga) variabel yaitu lama di jalanan, pendidikan dan tempat tinggal tidak terdapat hubungan dengan perilaku seksual anak jalanan di Kota Makassar

Review and statistical analysis of the ultrasonic velocity method for estimating the porosity fraction in polycrystalline materials

A review and statistical analysis of the ultrasonic velocity method for estimating the porosity fraction in polycrystalline materials is presented. Initially, a semi-empirical model is developed showing the origin of the linear relationship between ultrasonic velocity and porosity fraction. Then, from a compilation of data produced by many researchers, scatter plots of velocity versus percent porosity data are shown for Al2O3, MgO, porcelain-based ceramics, PZT, SiC, Si3N4, steel, tungsten, UO2,(U0.30Pu0.70)C, and YBa2Cu3O(7-x). Linear regression analysis produced predicted slope, intercept, correlation coefficient, level of significance, and confidence interval statistics for the data. Velocity values predicted from regression analysis for fully-dense materials are in good agreement with those calculated from elastic properties

Review and Statistical Analysis of the use of Ultrasonic Velocity for Estimating the Porosity Fraction in Polycrystalline Materials

The physical behavior of components manufactured from polycrystalline materials is in many cases directly dependent on the porosity fraction (volume fraction of pores). As examples concerning key properties of technologically-important materials, porosity fraction has been shown to affect (1) the strength, toughness and modulus of structural and refractory materials such as Steel [1], Tungsten [2], SiC [3], Si3N4 [3], and Al2O3 [3], (2) the strength of nuclear fuel materials such as UO2 [4–5]. (3) the thermal shock behavior and strength of porcelain-based ceramics [6–7], (4) the dielectric and elastic properties of piezoelectric materials such as PZT [8], and (5) the critical current density, diamagnetic response, and modulus of superconducting ceramics such as YBa2Cu3O7−x [9–11]. In such cases where physical properties are directly dependent on porosity fraction, the measurement of porosity fraction becomes important in the quality assurance process for the material

Growing Strawberries

PDF pages: 1

A coded aperture imaging system optimized for hard X-ray and gamma ray astronomy

A coded aperture imaging system was designed for the Gamma-Ray imaging spectrometer (GRIS). The system is optimized for imaging 511 keV positron-annihilation photons. For a galactic center 511-keV source strength of 0.001 sq/s, the source location accuracy is expected to be + or - 0.2 deg

Equipment and procedure for determining the elastic modulus of carbon-epoxy composites

Method includes test device design and fabrication and standard Naval Ordnance Laboratory /NOL/ test ring as the test specimen. Technique provides accurate measurement of NOL ring elastic modulus, and adapts for use with fiber glass epoxy/rings

The Gamma-Ray Imaging Spectrometer (GRIS): A new balloon-borne experiment for gamma-ray line astronomy

High resolution gamma-ray spectroscopy is a relatively new field that holds great promise for further understanding of high energy astrophysical processes. When the high resolution gamma-ray spectrometer (GRSE) was removed from the GRO payload, a balloon program was initiated to permit continued development and improvement of instrumentation in this field, as well as continued scientific observations. The Gamma-Ray Imaging Spectrometer (GRIS) is one of the experiments selected as part of this program. The instrument contains a number of new and innovative features that are expected to produce a significant improvement in source location accuracy and sensitivity over previous balloon and satellite experiments

Multi-scale and multi-physics deterioration modelling for design and assessment of reinforced concrete structures

This paper discusses the need for reliable and valid multi-scale and multi-physics prediction models to support the design of new as well as the assessment, maintenance, and repair of existing reinforced concrete structures. A multi-physics and multi-scale deterioration model for chloride-induced corrosion of reinforced concrete has been established. Ongoing work includes extension of the model to 3D as well as modelling of the impact of the steel-concrete interface characteristics and electrochemical potential on chloride thresholds. Identified challenges include, among others, the improved understanding and modelling of single- and multi-deterioration mechanisms, environmental exposure, and data for validation. We envision that next generation maintenance and management of reinforced concrete infrastructure will combine numerical simulations based on multi-scale and multi-physics principles and extensive in-situ monitoring, allowing continuous Bayesian updating of 4D simulations of functional performance

Computing the lower and upper bounds of Laplace eigenvalue problem: by combining conforming and nonconforming finite element methods

This article is devoted to computing the lower and upper bounds of the Laplace eigenvalue problem. By using the special nonconforming finite elements, i.e., enriched Crouzeix-Raviart element and extension $Q_1^{\rm rot}$, we get the lower bound of the eigenvalue. Additionally, we also use conforming finite elements to do the postprocessing to get the upper bound of the eigenvalue. The postprocessing method need only to solve the corresponding source problems and a small eigenvalue problem if higher order postprocessing method is implemented. Thus, we can obtain the lower and upper bounds of the eigenvalues simultaneously by solving eigenvalue problem only once. Some numerical results are also presented to validate our theoretical analysis.Comment: 19 pages, 4 figure