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Installation Procedure (installation + procedure)

Distribution by Scientific Domains

Engineering	50%

Selected Abstracts

A Modular Injection System, Multilevel Sampler, and Manifold for Tracer Tests

GROUND WATER, Issue 6 2003
Brian J. Mailloux
Ground water injection and sampling systems were developed for bacterial transport experiments in both homogenous and heterogeneous unconsolidated, surficial aquifers. Two types of injection systems, a large single tank and a dynamic mixing tank, were designed to deliver more than 800 L of amended ground water to the aquifer over 12 hours, without altering the ground water temperature, pH, Eh, or dissolved gas composition. Two types of multilevel samplers (MLSs) were designed and installed. Permanent MLSs performed well for the homogenous surficial aquifer, but their installation procedure promoted vertical mixing, which could obfuscate experimental data obtained from vertically stratified, heterogeneous aquifers. A novel, removable MLS was designed to fit in 2- and 4-inch wells. Expandable O-rings between each sampling port hydraulically isolated each port for sample collection when a nut was tightened at the land surface. A low-cost vacuum manifold system designed to work with both MLS designs used 50 mL centrifuge tubes to efficiently sample 12 MLS ports with one peristaltic pump head. The integrated system was developed and used during four field campaigns over a period of three years. During each campaign, more than 3000 ground water samples were collected in less than one week. This system should prove particularly useful for ground water tracer, injection, and push-pull experiments that require high-frequency and/or high-density sampling. [source]

Immediate functional loading of implants in single tooth replacement: a prospective clinical multicenter study

CLINICAL ORAL IMPLANTS RESEARCH, Issue 8 2008
Mauro Donati
Abstract Objectives: The aim of the present study was to evaluate the outcome of immediate functional loading of implants in single-tooth replacement using two different installation procedures. Material and Methods: One hundred and fifty-one subjects, who required single-tooth rehabilitation in the area of 15,25 and 35,45, were enrolled in eight private clinics in Italy. The implant sites were randomly allocated to one of the following treatment groups. In the control group, in which a standard preparation procedure for implant placement and submerged healing of the implant was used, abutment connection and loading of the implants were performed 3 months after installation. In the test group 1, a standard preparation procedure for the implant placement and immediate functional loading of implant was carried out. In the test 2 group, however, a modified implant installation procedure (osteotome technique) was used followed by immediate functional loading of the implant. Clinical and radiographic examinations were performed at 3 and 12 months of follow-up at all sites. Results: Three implants (5.5%) from the test 2 group (osteotome preparation) and one (2%) from the test 1 group (conventional drill preparation) failed to integrate and were removed one and three months after implant installation. The mean marginal bone loss assessed at 12 months was 0.31 mm (test 1), 0.25 mm (test 2) and 0.38 mm (control) (no statistically significant differences were found between the three treatment groups.) Conclusion: It is suggested that immediate functional loading of implants that are placed with a conventional installation technique and with sufficient primary stability may be considered as a valid treatment alternative in a single-tooth replacement. [source]

Innendämmung bei erhaltenswerten Fassaden , ein baukonstruktives Projektbeispiel

BAUPHYSIK, Issue 4 2009
Leiter des Instituts für Angewandte Bautechnik Hans-Jürgen Holle Prof. Dr.-Ing. habil.
Gebäudebestand; Energieeinsparung; reconstruction; energy performance Abstract Die Sanierung eines gründerzeitlichen Wohngebäudes in Hamburg aus dem Jahre 1907 mit erhaltenswerter Fassade wurde im Rahmen des Forschungsvorhabens "Energetische Sanierung" (EnSan) des Bundesministeriums für Wirtschaft und Technologie gefördert und wissenschaftlich begleitet. Zwei baugleiche Gebäudehälften wurden mit unterschiedlichen energetischen Sanierungskonzepten und -standards ("EnSan-Standard" und "Hamburger Standard") geplant und realisiert. Es wurden Konstruktionen einschließlich der dafür erforderlichen Einbauabläufe entwickelt. Die energetischen Zielgrößen sind erreicht worden. Der Endenergieverbrauch für Beheizung wurde um 80 % auf 32 kWh/m2a gesenkt. Der Primärenergieverbrauch beträgt gemittelt für beide Gebäudehälften ca. 95 kWh/m2a. Internal insulation of façades that are worth preserving. Example of a structural design project. The refurbishment of a residential buildings in Hamburg built in 1907 during the Wilhelminian era with a façade that was deemed worthy of preservation was funded as part of the research project "Energy-efficient refurbishment" (EnSan) by the German Federal Ministry of Economic Affairs and Technology, which also provided scientific backup. Two identical building parts were refurbished based on different energy-efficiency concepts and standards ("EnSan standard" and "Hamburg standard"). Structural components and associated installation procedures were developed. The energy target values were achieved. The heating energy end use was reduced by 80 % to 32 kWh/m2a. The average primary energy consumption for both building parts is approx. 95 kWh/m2a. [source]