Owner manuals for service and repair of FMVSS 121 air brake systems. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Final design and implementation plan for evaluating the effectiveness of FMVSS 105: hydraulic brake systems in passenger cars.

National Highway Traffic Safety Administration, Washington, D.C.

Optimized brake inspection. Final report. [Summary].

National Highway Traffic Safety Administration, Washington, D.C.

Component degradation: brake system performance. Volume II - technical report. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Motor vehicle brake fluid: water tolerance and viscosity. Final report. [Summary.].

National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

Motorman's practical air brake instructor; a concise up-to-date treatise on the construction and operation of the different air brake equipments used in modern electric transportation,

Mode of access: Internet.

The Westinghouse E-T air brake instruction pocket book : a complete work explaining in detail the improved Westinghouse locomotive air brake equipment, including both the no. 5 and the latest, perfected no. 6 style.

Mode of access: Internet.

Optimized brake inspection technical volume /

Final report; December 1977.

Tests of the automatic straight air brake on the Norfolk & Western railway,

Mode of access: Internet.

Federal motor vehicle safety standard no. 121--air brake systems : hearings before the Subcommittee on Governmental Efficiency and the District of Columbia of the Committee on Governmental Affairs, United States Senate, Ninety-fifth Congress, first- session ....

Hearings held Dec. 6, 1977-

Automobile friction materials: a test instrument and technique for determining dynamic mechanical properties in relation to brake squeal

This study is primarily concerned with the problem of break-squeal in disc brakes, using moulded organic disc pads. Moulded organic friction materials are complex composites and due to this complexity it was thought that they are unlikely to be of uniform composition. Variation in composition would under certain conditions of the braking system, cause slight changes in its vibrational characteristics thus causing resonance in the high audio-frequency range. Dynamic mechanical propertes appear the most likely parameters to be related to a given composition's tendency to promote squeal. Since it was necessary to test under service conditions a review was made of all the available commercial test instruments but as none were suitable it was necessary to design and develop a new instrument. The final instrument design, based on longitudinal resonance, enabled modulus and damping to be determined over a wide range of temperatures and frequencies. This apparatus has commercial value since it is not restricted to friction material testing. Both used and unused pads were tested and although the cause of brake squeal was not definitely established, the results enabled formulation of a tentative theory of the possible conditions for brake squeal. The presence of a temperature of minimum damping was indicated which may be of use to braking design engineers. Some auxilIary testing was also performed to establish the effect of water, oil and brake fluid and also to determine the effect of the various components of friction materials.

Aranyszabály helyett adósságfék - a német példa = Debt-brake instead of the golden rule - the case of Germany

Az Európai Unió megújuló gazdasági kormányzási rendszerének egyik meghatározó pillére a diszkrecionális gazdaságpolitikával szemben megfogalmazott szabályalapúság lesz. A minden korábbinál erősebb és vélhetően hatékonyabb szabályok bevezetésének legelkötelezettebb híve Németország. Az elmúlt évtizedekben a folyó költségvetési kiadások hiányból történő finanszírozásának tilalmát előíró aranyszabályt inkább kevesebb, mint több sikerrel alkalmazó Németország most arra vállalkozott, hogy nem csak saját hatáskörben vezeti be az ún. adósságféket, hanem követendő példaként állítja azt a többi tagország elé is. Írásunkban az aranyszabály, illetve az adósságfék előnyeit és hátrányait vesszük számba a német tapasztalatok felhasználásával. / === / The need to strengthen rules-based fiscal policy has emerged as a widely shared consensus amongst policy-makers in the recent economic and financial crisis. Germany has become the most devoted advocator of the new regime, where more innovative and effective fiscal rules are supposed to play an even bigger role than before. Germany supports such a move however not only in rhetoric but also in practice. It decided to abandon its several decade old golden rule and to adopt a more sophisticated one, the so-called debt-brake. This article provides a cost-benefit analysis of both the previous and the new fiscal rule.

Evaluation of gastrointestinal motility in awake rats: a learning exercise for undergraduate biomedical students

Souza MA, Souza MH, Palheta RC Jr, Cruz PR, Medeiros BA, Rola FH, Magalhaes PJ, Troncon LE, Santos AA. Evaluation of gastrointestinal motility in awake rats: a learning exercise for undergraduate biomedical students. Adv Physiol Educ 33: 343-348, 2009; doi: 10.1152/advan.90176.2008.-Current medical curricula devote scarce time for practical activities on digestive physiology, despite frequent misconceptions about dyspepsia and dysmotility phenomena. Thus, we designed a hands-on activity followed by a small-group discussion on gut motility. Male awake rats were randomly submitted to insulin, control, or hypertonic protocols. Insulin and control rats were gavage fed with 5% glucose solution, whereas hypertonic-fed rats were gavage fed with 50% glucose solution. Insulin treatment was performed 30 min before a meal. All meals (1.5 ml) contained an equal mass of phenol red dye. After 10, 15, or 20 min of meal gavage, rats were euthanized. Each subset consisted of six to eight rats. Dye recovery in the stomach and proximal, middle, and distal small intestine was measured by spectrophotometry, a safe and reliable method that can be performed by minimally trained students. In a separate group of rats, we used the same protocols except that the test meal contained (99m)Tc as a marker. Compared with control, the hypertonic meal delayed gastric emptying and gastrointestinal transit, whereas insulinic hypoglycemia accelerated them. The session helped engage our undergraduate students in observing and analyzing gut motor behavior. In conclusion, the fractional dye retention test can be used as a teaching tool to strengthen the understanding of basic physiopathological features of gastrointestinal motility.

Neural network model for designing automotive devices using SMD LED

The advantages offered by the electronic component LED (Light Emitting Diode) have resulted in a quick and extensive application of this device in the replacement of incandescent lights. In this combined application, however, the relationship between the design variables and the desired effect or result is very complex and renders it difficult to model using conventional techniques. This paper consists of the development of a technique using artificial neural networks that makes it possible to obtain the luminous intensity values of brake lights using SMD (Surface Mounted Device) LEDs from design data. This technique can be utilized to design any automotive device that uses groups of SMD LEDs. The results of industrial applications using SMD LED are presented to validate the proposed technique.