Nutritive value of barley rootlets,a by-product of malting

The nutrient contents as well as the amino acid pattern of the rootlets by-product were determined. The analysis showed that at least 19 amino acids were present of which threonine and tryptophan were found in variable amounts. The net protein utilisation of the rootlets and proteolan by-products and mixtures of both were determined. The results indicate that the rootlets succeeded in supporting normal growth of the rats fed this by-product. The values for digestibility, biological value and net protein utilisation for the diets prepared by mixing the rootlets and proteolan in equal proportion were found to be 86, 67.9 and 59% respectively.     

Corrosion par piqûres des alliages d'aluminium 5083-H321 et 6061-T651

Résumé Le comportement des alliages d'aluminium 5083-H321 et 6061-T651 en milieux aqueux avec deux concentrations de l'ion chlore en' présence et en absence de l'ion sulfate a été étudié par voie électrochimique. Les études potentiocinétiques ont permis de déterminer le potentiel de piqûres, tandis que les études potentiostatiques ont précisé davantage l'agressivité du milieu. Trois zones de pH ont été étudiées avec les deux techniques mentionnées, soit: 1–4, 4–9 et 9–12. Une étude morphologique au moyen de la microscopie électronique à balayage combinée par la méthode d'analyse de surface EDAX a été effectuée.

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The behaviour of aluminium alloys 5083-H321 and 6061-T651 in aqueous media containing two different concentrations of chloride ion, in the presence and in the absence of sulphate ion has been studied by electrochemical means. The potentiodynamic studies have permitted determination of the pitting potential, while the potentiostatic studies yielded information on the aggressiveness of the medium. The three regions of pH, studied with the two techniques are: 1–4, 4–9 and 9–12. A morphological study by scanning electron microscopy combined with (EDAX) analysis has been carried out.

     

Adaptive modulation and combining for bandwidth and power efficient communication over fading channels

Traditional fading mitigation techniques are designed relative to the worst‐case channel conditions, resulting in a poor utilization of the spectrum and the available power a good percentage of the time. In contrast, we introduce and investigate in this paper new adaptive modulation and diversity combining techniques that jointly select the most appropriate constellation size and the most suitable diversity branches in response to the channel variation and given a desired bit error rate (BER) requirement. Numerical results show that these newly proposed adaptive modulation and combining schemes can reduce considerably the average receiver channel estimation complexity as well as the power drain from the battery while offering high spectral efficiency and satisfying the desired outage probability and BER requirements. Copyright © 2006 John Wiley & Sons, Ltd.     

Mechanical Properties Analysis of 4340 Steel Specimen Heat Treated in Oven and Quenching in Three Different Fluids

This paper proposes a statistical approach to analyze the mechanical properties of a standard test specimen, of cylindrical geometry and in steel 4340, with a diameter of 6 mm, heat-treated and quenched in three different fluids. Samples were evaluated in standard tensile test to access their characteristic quantities: hardness, modulus of elasticity, yield strength, tensile strength and ultimate deformation. The proposed approach is gradually being built (a) by a presentation of the experimental device, (b) a presentation of the experimental plan and the results of the mechanical tests, (c) anova analysis of variance and a representation of the output responses using the RSM response surface method, and (d) an analysis of the results and discussion. The feasibility and effectiveness of the proposed approach leads to a precise and reliable model capable of predicting the variation of mechanical properties, depending on the tempering temperature, the tempering time and the cooling capacity of the quenching medium.     

Natural ventilation in Beirut residential buildings for extended comfort hours

This paper examines the effectiveness of natural ventilation in Beirut for the purpose of extending comfort periods within living and sleeping zones of the residential buildings. A field survey is conducted to estimate the common window opening and degree profiles. A base case model representing a typical residential apartment located in Beirut was then adopted in integrated environmental solutions (IES) software and calibrated by experimentation through monitoring simulated and measured data indoor. The calibrated IES model was used to evaluate typical wall layering and building local materials and their role in improving indoor comfort with natural ventilation. The simulation results showed that an optimal wall configuration of higher insulation and capacitance, comprised of a 5?cm layer of strawboard sandwiched between a 2?cm?×?10?cm wall of masonry Hempcrete units, achieved the highest degree of thermal comfort and enhanced comfort in winter season when compared to the base case.     

Mechanical investigation of tunnels: risk analysis and notation system

The current mechanical investigation strategy applied to RATP (Régie Autonome des Transpots Parisiens) tunnels is mainly based on visual inspection. All the works are inspected and every apparent fault is located and reported in inspection reports. However, this type of inspection detects only apparent faults without linking them to their causes. A new methodology of mechanical investigation is proposed in the framework of the ANR project MEDITOSS (Méthodologie de Diagnostic des Tunnels et Ouvrages Souterrains en Service), consisting in integrating mechanical investigation tools to better characterise the geometrical and mechanical state of the tunnel. This new strategy combines four techniques (ground penetrating radar, light dynamic penetrometer, endoscopy and geo-mechanical impedance). These techniques are applied to panels to obtain a ‘panel score’. This paper presents a risk analysis of the system studied (network of corridors and tunnels), by applying the bow-tie method in order to obtain information on its elements, its function and its pathologies. This analysis incorporates a quantitative characterisation method (scoring) to assess the state of corridors and tunnels. These methods are tested on infiltration and cracking pathologies for the risk analysis and on the notation of a corridor for the quantitative quantification.     

LED发光式LAN电缆测试器

电缆与连接器故障在LAN(局域网)中相对较常见。图1的电路可以测试直通或交叉式10BaseT、100BaseT或千兆位UTP(非屏蔽双绞线)和STP(屏蔽双绞线)电缆。电路会对每个链接线对作一次连续测试。当电缆两端RJ-45连接器的相应线对正确连     

Catheter-related bacteremia caused by Comamonas testosteroni in a hemodialysis patient

Comamonas testosteroni has rarely been implicated as a human pathogen. In general, the outcome of C. testosteroni infections is favorable. We report a case of fatal bacteremia caused by C. testosteroni in a 64-year-old woman on hemodialysis.