The Application of Recent Techniques in Flight Flutter Testing

The relative merits of sinusoidal excitation versus random atmospheric turbulence was investigated. The randomdec and autocorrelation methods were used to analyze data from a Learjet flight test. A parameter identification digital program, using least squares approach, was developed to determine the aeroelastic characteristics of a two mode system. The flight test program, computer program, and data reduction procedure is presented. Final results of the two modes of excitation obtained by Randomdec method are discussed

Analysis of the Learjet 35/36 Wing and Correlation with Experimental Results

Two NASTRAN models of the Gates Learjet Corporation Model 35/36 Wing were developed. The models and the problems encountered in their development are discussed. A skin buckling analysis used for the ultimate loading conditions is presented. A discussion of the static tests and the correlation of the static test with the NASTRAN results and the results of a supplementary semimonocoque beam analysis are also included

Cancer Research in the Arab World : A review of publications from seven countries between 2000–2013

This review aimed to examine trends in cancer research in the Arab world and identify existing research gaps. A search of the MEDLINE® database (National Library of Medicine, Bethesda, Maryland, USA) was undertaken for all cancer-related publications published between January 2000 and December 2013 from seven countries, including Bahrain, Kuwait, Iraq, Lebanon, Morocco, Palestine and Sudan. A total of 1,773 articles were identified, with a significant increase in yearly publications over time (P <0.005). Only 30.6% of the publications included subjects over the age of 50 years old. There was a dearth of cross-sectional/correlational studies (8.8%), randomised controlled trials (2.4%) and systematic reviews/meta-analyses (1.3%). Research exploring cancer associations mainly considered social and structural determinants of health (27.1%), followed by behavioural risk factors (14.1%), particularly tobacco use. Overall, more cancer research is needed in the Arab world, particularly analytical studies with high-quality evidence and those focusing on older age groups and associations with physical activity and diet

Evaluation environnementale et choix de stratégies durables de gestion des risques naturels

International audienceDevenus une référence suite à la Déclaration de Rio (1992), les principes du développement durable ont entrainé une modification des pratiques décisionnelles dans plusieurs domaines, dont celui de la gestion des risques naturels et des catastrophes induites. Aussi l'évaluation s'impose aujourd'hui comme une étape cruciale dans l'opérationnalisation de la durabilité. Dans le cadre du projet de recherche intitulé " Prise en compte des INCERTitudes pour des Décisions Durables " (INCERDD), financé par l'ANR1, qui vise à élaborer une démarche pour l'intégration des différentes incertitudes dans le processus de prise de décision, une méthodologie a été proposée pour évaluer la durabilité des stratégies de gestion. Cette méthodologie est basée sur une série de critères parmi lesquels la " durabilité environnementale " pour cerner les implications environnementales des stratégies. La présente communication se propose de démontrer l'adéquation de l'évaluation environnementale comme support de décision dans la gestion durable des risques et catastrophes naturels. Elle vise donc à apporter des éléments méthodologiques pour mesurer la qualité environnementale des stratégies de gestion des risques naturels en milieu urbain

ECONOMIC FEASIBILITY STUDY FOR MUSHROOM PRODUCTION IN SMALL ENTERPRISES

Many countries are interested in production of Mushroom because of its high nutritive value. In Egypt, production of Mushroom is about 0.06% of the world production. Therefore, the present study aimed to investigate the economic feasibility of Mushroom production to evaluate the predicted profits in Egypt. The results showed that production of Mushroom significantly increased by 0.15 thousand ton/year. China, U.S.A and Germany are the top producing countries where 46.11% from the total world production is produced by these countries. The top exporting countries are China, Poland and Ireland since they export 57.67% from the total world exports of Mushroom. Meanwhile, Germany, Japan, England and U.S.A. are the top importing countries which import about 574.82% thousand tons/year through (2002- 2004). The study revealed that production of Mushroom is profitable as an enterprise for small investors in Egypt. Total production costs per year is about L.E. 8000. This small project gives two work opportunities and income of L.E. 12 thousand per year. The Internal rate of return of the enterprise is about 35% and the Payback period is about three years. Mushroom, the simple rate of return on investment is about 36%. The sensitivity analysis indicated that the least Internal rate of return supposing reduction of total income, is about 10% or increasing the total costs by 10%, the least Internal rate of return reached to14%. Whereas, simple rate of return on investment was estimated by 24% which was more than the interest rate in commercial banks that reached 10%. Therefore, This study recommends encouraging young-people enterprises in rural communities in new lands to produce Mushroom, by introducing technical consults, financial facilities for small investors. Also, limiting production and marketing difficulties, improving efficiency of marketing systems. In addition to maximizing production of Mushroom for exporting to the international markets and organizing training courses for spotting light on the economic feasibility of Mushroom to increase number of the investors to produce Mushroom