Concrete Whiteness for Barrier Rails, MLR-97-04, 1997

Research has shown that maximum reflectivity, using white cement concrete contributes to increased safety of barrier rails. This research evaluated the whiteness of concrete mixes using white cement, ground granulated blast furnace slag, and natural sand versus manufactured sand. Results indicated mixes containing white cement achieve the highest reflectivity.

Traffic Management Strategies for Merge Area in Rural Interstate Work Zones, CTRE 97-12, 1999

The Iowa Department of Transportation, like many other state transportation agencies, is experiencing growing congestion and traffic delays in work zones on rural interstate highways. The congestion results in unproductive and wasteful delays for both motorists and commercial vehicles. It also results in hazardous conditions where vehicle stopped in queues on rural interstate highways are being approached by vehicles upstream at very high speeds. The delays also result in driver frustration, making some drivers willing to take unsafe risks in an effort to bypass delays. To reduce the safety hazards and unproductive delays of congested rural interstate work zones, the Iowa Department of Transportation would like to improve its traffic management strategies at these locations. Applying better management practices requires knowledge of the traffic flow properties and driver behavior in and around work zones, and knowledge of possible management strategies. The project reported here and in a companion report documents research which seeks to better understand traffic flow behavior at rural interstate highway work zones and to estimate the traffic carrying capacity of work zone lane closures. In addition, this document also reports on technology available to better manage traffic in and around work zones.

Hvem styrde hit din väg, op. 97, nro 6 [!]

Soitinnus: lauluääni, piano.

Denervação acetabular cranial e dorsal no tratamento da displasia coxofemoral em cães: 360 dias de evolução de 97 casos

Realizou-se a pesquisa com o intuito de avaliar os resultados clínicos da denervação acetabular cranial e dorsal por curetagem em cães com displasia coxofemoral. Foram estudados, para tanto, 97 cães, sem predileção racial ou sexual, de 1-7 anos de idade, com diagnóstico clínico e radiográfico de displasia coxofemoral. Para avaliação dos resultados da técnica cirúrgica, de curetagem das fibras nervosas do periósteo acetabular cranial e dorsal, exames clínicos foram realizados no momento pré-operatório (exame inicial), e pós-operatório, nos dias dois, sete, 14, 21, 30, 60, 180 e 360. Todos os animais foram avaliados quanto à claudicação, dor à movimentação e toque, grau de atrofia muscular, sensibilidade dolorosa ao teste de Ortolani, e qualidade de vida. A denervação reduziu a claudicação, e dor à movimentação e toque à partir de dois dias de pós-operatório, reduziu atrofia muscular aos 60 dias pós-operatórios, e melhorou a qualidade de vida dos pacientes tratados, sob a ótica dos proprietários e veterinários aos 360 dias de pós-operatório. A dener-vação acetabular dorsal é técnica factível no tratamento da dor conseqüente à displasia coxofemoral em cães, com decréscimo significativo desta após dois dias da intervenção cirúrgica, aumenta qualidade de vida e proporciona maior atividade aos pacientes com proprietários satisfeitos quanto aos resultados do procedimento. A técnica cirúrgica deve incluir a curetagem das fibras nervosas do periósteo acetabular tanto da região cranial quanto dorsal.

Les sept merveilles du n° 7 : parodie électro-physico-magnético-burlesco-féerico-dramatico-comique en 9 tableaux dont un prologue et un entr'acte. [suivi de ] L'ami François : comédie-vaudeville en 1 acte. Livr. 97 / par MM. Cormon et Eugène Grangé ; par MM. Bourdois et Émile Colliot

Collection : Théâtre contemporain illustré ; 96e et 97e livraisons

Les sept merveilles du n° 7 : parodie électro-physico-magnético-burlesco-féerico-dramatico-comique en 9 tableaux dont un prologue et un entr'acte. [suivi de ] L'ami François : comédie-vaudeville en 1 acte. Livr. 97 / par MM. Cormon et Eugène Grangé ; par MM. Bourdois et Émile Colliot

Collection : Théâtre contemporain illustré ; 96e et 97e livraisons

Optical Properties of Sb2Te3, and Dilute Magnetic Semiconductors Sb1.97 VO.03 Te3 and Sb1.94 CrO.06 Te3

This thesis reports on the optical properties of the dilute magnetic semiconductors, Sb1.97 V 0.03 Te3 and Sb1.94Cr0.06Te3, along with the parent compound Sb2Te3' These materials develop a ferromagnetic state at low temperature with Curie temperatures of 22 K and 16 K respectively. All three samples were oriented such that the electric field vector of the light was perpendicular to the c-axis. The reflectance profile of these samples in the mid-infrared (500 to 3000 cm-1) shows a pronounced plasma edge which retracts with decreasing temperature. The far-infrared region of these samples exhibits a phonon at ~ 60 cm-1 which softens as temperature decreases. Kramers-Kronig analysis and a Drude-Lorentz model were employed to determine the optical constants of the bulk samples. The real part of the optical conductivity is shown to consist of intraband contributions at frequencies below the energy gap (~0.26 eV) and interband contributions at frequencies above the energy gap. The temperature dependence of the scattering rate show that a mix of phonon and impurity scattering are present, while the signature of traditional spin disorder (magnetic) scattering was difficult to confirm.

Phosphorylation du CTD de l'ARN polymérase II et impact de l'histone H2A.Z sur le positionnement des nucléosomes chez S. cerevisiae

La phosphorylation du domaine C-terminal de l’ARN polymérase II permet à ce complexe protéique d’exécuter la transcription des gènes, en plus de coupler à la transcription des événements moléculaires comme la maturation des ARNm. Mes résultats montrent que même si cette phosphorylation suit un patron similaire à l’ensemble des gènes, il existe des exceptions pouvant être dues à des mécanismes alternatifs de phosphorylation du CTD. Le présent ouvrage s’intéresse également au rôle qu’occupe la variante d’histone H2A.Z dans l’organisation de la chromatine. Des études précédentes on montré que le positionnement de certains nucléosomes le long de l’ADN serait influencé par H2A.Z et aurait une influence sur la capacité de transcrire les gènes. Par une approche génomique utilisant les puces à ADN, j’ai cartographié l’impact de la délétion de H2A.Z sur la structure des nucléosomes. Enfin, des résultats intéressants sur la dynamique d’incorporation de H2A.Z à la chromatine ont été obtenus.