Thermal expansion of composites using Moire interferometry

An experimental technique for precise measurement of the thermal response of fiber-reinforced composite materials uses moire interferometry with fringe multiplication which yield a sensitivity of 833 nm (32.8 mu in.) per fringe. Results from the technique are compared with those obtained from electrical resistance strain gages, and also those predicted from classical lamination theory. Temperature dependent coefficients of thermal expansion for composite materials subjected to thermal cycling in the temperature range of 297 K (75 F) to 422 K (300 F) were determined for four laminate configurations (0, 90, 0/ + or - 45/90 sub s and 0/90/ + or - 45 sub s) of T300/5208 graphite epoxy, and ranged from -0.107 mu epsilon K/1 (-0.059 mu epsilon deg F/-) for the 0 laminate to 32.18 mu epsilon K/1 (17.88 mu epsilon F/1) for the 90 laminate. Moisture was found to greatly influence the thermal response of a quasi-isotropic laminate, resulting in hysteresis and residual compressive strain as the moisture content was reduced. Comparisons between moire and strain gage measurements were inconclusive with both techniques giving consistent but systematically different results. Differences of as much as 29% were observed

Prevalensi Karies dan Indeks D E F pada Murid-murid Kelas I, II, dan III Sekolah Dasar yang Berada di Sekitar Klinik Kerja Mahasiswa Fakultas Kedokteran Gigi UNPAD

Penelitian ini bertujuan untuk mengetahui gambaran umum tentang statuskesehatan gigi dan mulut pada murid-murid kelas I, II, dan III Sekolah Dasaryang berada di sekitar Klinik Kerja Mahasiswa FKG Unpad dengan melihatprevalensi karies dan indeks def-nya. Jenis penelitian ini adalah deskriptif.Sampel penelitian sebanyak 333 orang murid, yaitu murid-murid kelas I, II, danIII dari 4 buah Sekolah Dasar diambil secara acak, yang berlokasi di sekitar klinikkerja mahasiswa FKG Unpad. Hasil penelitian menunjukkan prevalensi kariesadalah sebesar 99,9% yang berarti hampir semua anak pada penelitian inimenderita karies, sedangkan indeks def adalah 10,2 artinya pada setiap anakyang diperiksa terdapat 10,2 gigi yang mengalami karies, ditambal, dan sudahdicabut atau diindikasikan untuk pencabutan. Hal ini menunjukkan bahwakeadaan kesehatan gigi dan mulut murid-murid kelas I, II, dan III Sekolah Dasaryang berada di sekitar klinik kerja mahasiswa FKG Unpad adalah buruk

Analisis Pengendalian Kualitas Mutu Produk Sebelum Eksport dengan Mengunakan Metode Six Sigma pada PT. Nichindo Manado Suisan

PT. Nichindo Manado Suisan is a foreign private export company engaged in food products. PT produces various products that are produced are katsuobuhi products, and hanakatsuo derivatives, itokezuri made from skipjack fish, this research aims to find out how to control and what factors cause defective products. According to Gaspersz (2005: 310) six sigma is a vision of improvingquality towards a target of 3.4 failures per million opportunities for every transaction of goods and product services, in the research in January and April 2018 found 10234 kg defective products from 80797 kg production. there is a further research conducted using the Six Sigma method which is a structured methodology to reduce process variation while reducing product defects sothat improvements are expected in the products produced with the aim of Analyzing quality control before export by PT. nichindo manado suisan and Knowing what factors cause quality to be less good by using rare DMAIC Six Sigma is Define, Measure, Analyze, Improve, Control. In the define phase, you know what kind of defects in production are packaging. Then in the measure phasethrough the Pareto diagram it can be the most dominant damage. Then in the analyze stage there are some root causes of the problem, among others are the lack of supervision from the company, and the lack of employee skills, so that in the improve phase there will be some quality improvement proposals, and stage of control The company must continue to make recommendations for continuous improvement of controls so that the number of defects can continue to decrease, based on the results of data collection, analysis and discussion caused by a less skilled workforce, therefore the company must carry out strict supervision

PROGRAM BIMBINGAN UNTUK PENGEMBANGAN PERILAKU PROSOSIAL ANAK USIA DINI MELALUI METODE DONGENG

Abstract: Among the various aspects that need is developed at an early age is a period in which there is a social aspect of prosocial behavior. Early childhood in the present face enormous challenges as they seek to develop prosocial behavior because of the program that is likely to cause aggressive behavior of children. To develop it requires media and appropriate methods, ideal and effective, and appropriate method is through a fairy tale. The aim of this study were: 1) to describe the objective conditions prosocial behavior early childhood; 2) describe the objective conditions of the program to develop prosocial behavior; and 3) develop a mentoring program to develop students' prosocial behavior through methods of fairy tales. This study used a qualitative approach with descriptive methods. The subjects were 15 students of class B RA. Suhayah Kampung Melayu, East Jakarta. The data collection instrument used was the observation and interview guides are made by the research team. Based on the analysis of the data obtained the following results: 1) In general, students of class B have not been fully prosocial behavior; 2) There are no special programs to develop students' prosocial behavior; 3) Program guidance to develop prosocial behaviors early childhood through fairy tales methods that have been made through the stacking author be some stages: preparation program development.Keywords: voluntary counseling, prosocial behavior, a fairy tale

An outline of an asymmetric two-component theory of aspect

The paper presents the bases of an asymmetric two-component model of aspect. The main theoretical conclusion of the study is that (grammatical) viewpoint aspect and situation aspect are not independent aspectual levels, since the former often modifies the input situation aspect of the phrase/sentence. As it is shown, besides the arguments and adjuncts of the predicate, viewpoint aspect is also an important factor in compositionally marking situation aspect. The aspectual framework put forward in the paper is verified and illustrated on the basis of the aspectual system of Hungarian and some examples taken from English linguistic data

State estimation of chemical engineering systems tending to multiple solutions

A well-evaluated state covariance matrix avoids error propagation due to divergence issues and, thereby, it is crucial for a successful state estimator design. In this paper we investigate the performance of the state covariance matrices used in three unconstrained Extended Kalman Filter (EKF) formulations and one constrained EKF formulation (CEKF). As benchmark case studies we have chosen: a) a batch chemical reactor with reversible reactions whose system model and measurement are such that multiple states satisfy the equilibrium condition and b) a CSTR with exothermic irreversible reactions and cooling jacket energy balance whose nonlinear behavior includes multiple steady-states and limit cycles. The results have shown that CEKF is in general the best choice of EKF formulations (even if they are constrained with an ad hoc clipping strategy which avoids undesired states) for such case studies. Contrary to a clipped EKF formulation, CEKF incorporates constraints into an optimization problem, which minimizes the noise in a least square sense preventing a bad noise distribution. It is also shown that, although the Moving Horizon Estimation (MHE) provides greater robustness to a poor guess of the initial state, converging in less steps to the actual states, it is not justified for our examples due to the high additional computational effort

Models of classroom assessment for course-based research experiences

Course-based research pedagogy involves positioning students as contributors to authentic research projects as part of an engaging educational experience that promotes their learning and persistence in science. To develop a model for assessing and grading students engaged in this type of learning experience, the assessment aims and practices of a community of experienced course-based research instructors were collected and analyzed. This approach defines four aims of course-based research assessment—(1) Assessing Laboratory Work and Scientific Thinking; (2) Evaluating Mastery of Concepts, Quantitative Thinking and Skills; (3) Appraising Forms of Scientific Communication; and (4) Metacognition of Learning—along with a set of practices for each aim. These aims and practices of assessment were then integrated with previously developed models of course-based research instruction to reveal an assessment program in which instructors provide extensive feedback to support productive student engagement in research while grading those aspects of research that are necessary for the student to succeed. Assessment conducted in this way delicately balances the need to facilitate students’ ongoing research with the requirement of a final grade without undercutting the important aims of a CRE education

Rapid characterization of drilled test earth cores by x-ray energy dispersive analysis

The usability of electron microprobe analysis employing x-ray energy-dispersive (EDX) measurements for the characterization of core specimens was demonstrated. The EDX method produced comparable results to the wavelength-dispersive x-ray (WLX) method. The cost per analysis by EDX is approximately 20 percent that of WLX. The EDX method identified the minerals, revealed alteration of the minerals and can form a basis for predicting possible pollutants associated with use of the geothermal energy site