Field Implementation Research Articles

Proactive integrated traffic control to mitigate congestion at toll plazas

AbstractToll plazas on expressways often experience congestion owing to the imbalance between traffic demand and supply. To address this issue, this paper designs a proactive traffic control method to relieve congestion at toll plazas based on the model predictive control (MPC) that integrates the dynamic lane configuration, that is, the numbers of electronic toll collection (ETC) and manual toll collection (MTC) lanes, and the variable speed limit (VSL). The proposed method first forecasts short‐term traffic demand in toll plazas based on the long short‐term memory neural network. Then the cell transmission model (CTM) is applied to predict the traffic evolutions in the toll plaza area. At last, the MPC‐based control framework is used to optimize the numbers of ETC and MTC lanes and the variable speed limit to minimize the total vehicle travel time in a rolling horizon. Micro‐simulation tests are carried out in VISSIM to verify the effectiveness of the proposed control method. The simulation results show that the proposed control method can significantly improve the traffic performances at the toll plazas. The findings in this study can lead to field implementation of proactive control at toll plazas.

Design and Field Implementation of a Hierarchical Control Solution for Residential Energy Storage Systems

This paper presents an innovative approach to the design and real-life field implementation of a hierarchical control solution for a residential ESS (energy storage system) for consumers/prosumers. The proposed control solution minimises residential prosumers’ electricity bill. It consists of an offline controller (secondary level) implemented in the cloud, which works in total synergy with a local real-time controller (primary level) at the ESS. The offline controller proposes an optimal day-ahead energy management strategy using the forecasted demand and PV generation; whereas the local real-time controller is responsible for the management strategy in the best suitable way while dealing with the system real-time constraints and forecast uncertainties. Distributed implementation and demonstration of the solution have been performed through a cloud control platform, operated by an aggregator. Moreover, an offline analysis has been carried out to assess the performances of the real-life implementation outputs and verify the effectiveness of the proposed approach. The obtained results show promising performances of the overall system and implementation approach. This will further ease the integration process of consumer/prosumer with the future virtual power plant or local electricity market operator. The main concept has been developed to be implemented within the StoreNet pilot project platform.

Design of Controlled Pre-Split Blasting in a Hydroelectric Construction Project

Geologic conditions and design requirements around upstream Nachtigal Falls, in Cameroon, for the hydroelectric construction project on the Sanaga River dictated close control of blasting procedures with very precise geometry to obtain safe and economical excavation lines. Various techniques of pre-split blasting were used in the initial stage of all major excavations. Hole diameters for pre-splitting were 89 mm, and hole spacing ranged from 0.8 to 1m. Explosive charges varied from 1 to 7 kg per hole, and the detonating cord linear charge ranged from 12 to 60g. The contour blasting technique is aimed at controlling overbreak and improving remaining slope stability. Over-break or over-excavation needs to be controlled since its occurrence compromises the operations in terms of safety (instability in the remaining slope; loosening rocks that increase the risk for operational people; an irregular free face for subsequent blasting); and costs (need for reinforcement of the remaining rock structure through costly sustainment systems; increase in concrete volumes in civil works). This paper discusses in detail the design and field implementation of pre-split blasts successfully carried out to achieve clean vertical walls in moderately dipping, though complexly sheared and jointed gneiss. Based on the results of the experiments, we were able to design a pre-splitting pattern both experimentally and in a very cost-effective manner. It is felt that the methods developed on this project could have useful applications on other major construction projects. Doi: 10.28991/CEJ-2023-09-03-05 Full Text: PDF

Multi-objective optimization of petroleum engineering problems using a hybrid workflow: Combination of particle swarm optimization, fuzzy logic, imperialist competitive algorithm and response surface methodology

Optimization techniques are used to find the strategies for chemically enhanced oil recovery in a sandstone reservoir. This research develops a multi-objective optimization methodology by combining experimental design methods and artificial intelligence techniques. The capability of this hybrid artificial intelligence methodology is evaluated in the optimal design of control variables to achieve the highest performance of a surfactant/polymer injection project into a sandstone reservoir. In the first step, a two-level full factorial design is used to screen initial control variables. Thereafter a response surface methodology (RSM) is employed to optimize the RF and NPV of a CEOR application. The neuro-simulation technique provides the required outputs for screening and RSM designs. The performance of network is improved using the imperialist competitive algorithm (ICA). Having precise fitness functions, multi-attribute optimization was performed using particle swarm optimization (PSO) and fuzzy logic (FL). This paper discusses the advantages of different perspectives over single-objective approaches. Using the RF-objective PSO algorithm, RF exceeded 64% of original oil in place (OOIP), while the profit of project slumped to $5.90 MM. On the other hand, NPV-attribute PSO increased NPV to $8.48 MM. Meanwhile, RF, as the technical success of the project, plunged to less than 53% OOIP. However, the proposed multi-objective algorithm increased RF to 57% OOIP with NPV of $8.11 MM, solving the trade-off between technical and economic terms. The results of this study indicate the efficacy of proposed hybrid workflow for multi-attribute decision-making of CEOR field implementation.

Kylin 1.0: An ab-initio density matrix renormalization group quantum chemistry program.

The accurate evaluation of electron correlations is highly necessary for the proper descriptions of the electronic structures in strongly correlated molecules, ranging from bond-dissociating molecules, polyradicals, to large conjugated molecules and transition metal complexes. For this purpose, in this paper, a new ab-initio quantum chemistry program Kylin 1.0 for electron correlation calculations at various quantum many-body levels, including configuration interaction (CI), perturbation theory (PT), and density matrix renormalization group (DMRG), is presented. Furthermore, fundamental quantum chemistry methods such as Hartree-Fock self-consistent field (HF-SCF) and the complete active space SCF (CASSCF) are also implemented. The Kylin 1.0 program possesses the following features: (1) a matrix product operator (MPO) formulation-based efficient DMRG implementation for describing static electron correlation within a large active space composed of more than 100 orbitals, supporting both and symmetries; (2) an efficient second-order DMRG-self-consistent field (SCF) implementation; (3) an externally contracted multi-reference CI (MRCI) and Epstein-Nesbet PT with DMRG reference wave functions for including the remaining dynamic electron correlation outside the large active spaces. In this paper, we introduce the capabilities and numerical benchmark examples of the Kylin 1.0 program.

DEVELOPMENT OF BLOG-BASED CAREER CARD MEDIA FOR CAREER UNDERSTANDING IN SMA

Career understanding is an information service that is very important to be given to students, as an information service to educate them about careers so that students understand the career direction they will choose after graduating from high school. The purpose of development in this study is to measure the effectiveness of a blog-based career card as a medium for understanding careers to students and to know the development of a blog-based career card media" in this study using the RND (Research and Development) method, which is a mixture of qualitative and quantitative. to obtain qualitative data results with the results of suggestions and input from expert validation. Then quantitatively with the results of the student response questionnaire, and the results of the validation test from the experts. The method used in this research is the method developed by Borg & Gall using a development procedure by going through 10 stages of development, the stage of collecting data by analyzing to obtain problems. then the planning stage, the product development stage, the validation stage and initial field trial, the revision stage of the test results, the field trial stage, the product improvement stage, the field implementation test stage, the final product refinement stage and finally the cementation and implementation stage.<p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/soc/0077/a.php" alt="Hit counter" /></p>

Effect of the variation of phase-transition fracturing fluid thermophysical properties on the wellbore temperature

Accurate prediction of wellbore temperature is the key to ensuring the success of self-propping phase-transition fracturing (SPF) technology, which uses two immiscible fluids to form solid proppant in the hydraulic fracture. Since the thermal-sensitive physical parameters of the two immiscible fluids significantly influence the wellbore temperature distribution, a wellbore temperature model considering reaction heat is established, and the mathematical relationship between the physical parameters of fluid and temperature is introduced. The exemplary cases are analyzed to assess the influence degree of those factors on wellbore temperature distribution. The results show that the reaction heat exerts the most critical effect on the wellbore temperature; the specific heat capacity effect is ranked second, while the influence of density is small. As to the coupled effect of the three factors, its influence degree is between those of the reaction heat and specific heat capacity. Therefore, the wellbore temperature must be predicted considering the influence of reaction heat and the varying specific heat capacity and density to ensure the smooth injection of the phase-transition fracturing fluid system (PFFS). These findings could help reveal the action mechanism of reaction heat and thermal-sensitive physical parameters in the heat transfer process, which is of great significance for the theoretical research and field implementation of the SPF technology.

Field performance monitoring of pervious concrete pavements

Pervious concrete pavements (PCP) have been successfully constructed in low-to-medium volume roads attributed to their sustainability benefits. Several studies have investigated the hydrological performance of PCPs, but limited attention has been given to the structural and environmental aspects. Thus, the objective of this study was to monitor the structural, hydrological and environmental performance of two PCP parking lots built using in-situ and ready-mix methods. Structural distresses were classified based on the distress identification manual, while the infiltration tests were performed every three months for three years to quantify the clogging rate. Joints/edges formed the weakest zones, while inefficient maintenance caused 98% clogging within 18 months. Further, in-situ mixing was 17% cheaper and 0.74% carbon-intensive than ready-mix technology. Overall, this research is envisioned to pave way for the development of guidelines that classify distresses and severity levels specific to PCPs, which also cover adequate maintenance recommendations for field implementation.

Development, exergoeconomic assessment and optimization of a novel municipal solid waste-incineration and solar thermal energy based integrated power plant: An effort to improve the performance of the power plant

Due to the growing population rate and increasing social activities, the content of municipal solid waste (MSW) production is increasing. Energy production from MSW is one of the promising ways to dispose of waste and reduce the limitations of fossil energies. However, this technology has a relatively low efficiency due to the high volume of moisture and inert materials in MSW and the lower heating value of waste. The integration of solar thermal collectors is one of the suggested solutions to increase the temperature of inlet steam to the power generation cycle in order to improve the power plant performance. In this regards, the present study develops a comprehensive thermodynamic-conceptual and exergoeconomic investigation of the performance of a MSW-incineration (MSWI) plant integrated with a parabolic trough collector (PTC)-based solar field. Accordingly, the temperature of the steam elevates by the solar field before entering the electric power generation cycle. Additionally, the solar unit is integrated with a phase change material (PCM)-based storage system. The use of storage tank at the delivery line of PTC can improve the power plant’s reliability. A comprehensive comparison of the developed power plant with the conventional MSWI power plant is presented. In addition, the technical and economic behaviors of the considered power plant have been optimized under two different single and multi-objective optimization scenarios. The outcomes indicated that the developed power plant can provide 15.75% and 15.68% higher energetic and exergetic efficiencies compared to MSWI power plant. In addition, the rate of electric power obtained from S-MSWI power plant is almost 16.1% more compared to MSWI power plant. However, the total cost rate of MSWI plant is almost 24.13% lower compared to the developed power plant. But, the value of LCOE in the developed power plant is approximately 8.93% lower than MSWI power plant. It was also found that, the multi-objective optimization can provide better and optimal results to energy engineers and decision makers compared the single-optimization. The conceptual design of the implementation of the solar field is also developed in a specific geographical condition. Additionally, this research comes from the key technology of the National Key Laboratory of Environmental Protection.

Hybrid nanofiller reinforcement in thermoset and biothermoset applications: A review

Abstract Thermoset and biothermoset applications have been advancing tremendously in recent years due to their easy processing, versatility, and exceptional mechanical and thermal properties. Biothermoset is a type of thermoset that is produced using biological resources, either in portions by blending with the conventional resin, or completely. Various research has been employed to accommodate their high and rapidly growing demands and broaden their functions and implementation in numerous fields. One of these attempts is the reinforcement of nanofillers. Nanofillers such as nanoclay, graphene nanoplatelets, carbon nanotubes, nanodiamond, etc., possess diverse and outstanding properties and are also easily accessible. Recently, there has been a developing trend of hybridizing two or more types of nanofillers as a hybrid reinforcement system to address the limitations of single-filler reinforcement systems and to establish better-supporting properties of the nanocomposites. In this review, we discussed the use of hybrid nanofillers in different thermoset and biothermoset applications. Emphasis is given to the types of hybrids, their interactions with each other and the host polymer, and the effects of their contents and ratios. Limitations from the previous works are also discussed and the future undertaking of research on hybrid nanofillers is also proposed.

Responses of soil greenhouse gas emissions to no-tillage: A global meta-analysis

No-tillage (NT) is an effective agricultural practice for climate change mitigation and food security, which is extensively adopted worldwide. The sustainability of NT depends on the trade-offs between NT-induced crop productivity and greenhouse gas (GHG, i.e., CO2, CH4, and N2O) emissions. The climate and soil properties strongly influence the trade-offs and contradictory observations have been made by different researchers. To evaluate the responses of crop yields and GHG emissions to NT in various cereal systems, a global meta-analysis of 946 paired data from 116 peer-reviewed studies was conducted in this work. Overall, NT reduced global warming potential (GWP) by 14.4 % but did not change crop yields. Specifically, NT significantly inhibited CO2, CH4, and N2O emissions and enhanced CH4 uptake in temperate zones, with GWP decreased by 12.3 % in subtropical zones only. The clay loam and silt loam were recommended for NT practice implementation globally. Further analysis suggested that NT reduced GWP by 10.8 % in barley, 13.7 % in maize, 22.5 % in rice, and 30.1 % in soybean. NT dramatically increased wheat and soybean yields globally, whereas reduced barley yields significantly, indicating cautious consideration should be taken for NT implementation in barley fields. The suppression effect in GHG emissions and GWP could be reduced under long-term (>10 years) NT practices, which, on the other hand, improved crop yields by 5.57 %. NT inhibited emissions of the three GHGs in acid and alkaline soils, and hindered CH4 uptake strongly in neutral soils. This meta-analysis offers a solid scientific foundation for assessing the effects of NT practices on GHG emissions and agricultural productivity. It also offers fundamental knowledge for mitigating climate change by NT.

Strategi Dakwah Majelis Taklim Mushola Al-Falah Haurgeulis Dalam Meningkatkan Jamaah

The taklim council, as a form of preaching organization and religious studies, has now been packaged with appropriate preaching strategies in order to attract young people to study religion while not appearing outdated. The taklim council Al-Falah, which is the first place in Haurgeulis for Islamic religious studies specifically for Muslim women, was established in early 2018 with only eight members and now has around 100 members. The increase in congregations in less than two years demonstrates that the taklim council’s preaching strategy has been quite successful. This paper provides an understanding how preaching strategies uses by the taklim council Al-Falah Haurgeulis of increase in the congregation. This study uses a qualitative field research method with descriptive analysis. In-depth interviews, observation, and documentation were used to collect data. According to the findings of this study (1) formulating a preaching strategy by examining the relationship between the organization and its environment, (2) the use of preaching strategies in the field implementation process are sentimental strategies, rational strategies, and sensory strategies, (3) Do evaluations and show changes in the congregation is viewed in terms of quantity and quality.

Comprehensive Automated Routine Implementation, Validation, and Benchmark of the Anisotropic Force Field (AUA4) Using Python and GROMACS

Molecular simulation users are sometimes discouraged from using specific molecular models because of the inconvenience of finding the force field parameters and preparing and validating the topology files. To facilitate this process and make the accurate anisotropic force field AUA4 available to molecular dynamics users, we have created and validated an automated topology and coordinate file creation routine for the GROMACS molecular simulation software. In the present work, we describe the AUA4, explain its particularities and how it was implemented, thoroughly validating the implementation, and for the first time, perform a molecular dynamics benchmark for this transferable force field. Several properties were computed, namely, liquid density, vapor pressure, and vaporization enthalpy by conducting explicit vapor-liquid interface simulations. The results evidence the correct implementation showing slight deviations from the parametrization studies. The benchmark shows the superior predictive capability of the AUA4 in recreating liquid density (RMSD equal to 17.0 kg/m3) and vaporization enthalpy (RMSD equal to 1.3 kJ/mol) compared to other transferable force fields. In addition, its superior computational time performance doubles or even triples compared to an all-atom force field such as the OPLS, depending on whether the workstation counts with GPU.

Towards Edge-Precise Cloud and Shadow Detection on the GaoFen-1 Dataset: A Visual, Comprehensive Investigation

Remote sensing images are usually contaminated by opaque cloud and shadow regions when acquired, and therefore cloud and shadow detection arises as one of the essential prerequisites for restoration and prediction of the objects of interest underneath, which are required by further processing and analysis. Cutting-edge, learning-based segmentation techniques, given a well-labeled, sufficient sample set, are significantly developed for such a detection issue and can already achieve region-accurate or even pixel-precise performance. However, it may possibly be problematic to attempt to apply the sophisticated segmentation techniques to label-free datasets in a straightforward way, more specifically, to the remote sensing data generated by the Chinese domestic satellite GaoFen-1. We wish to partially address such a segmentation problem from a practical perspective rather than in a conceptual way. This can be performed by considering a hypothesis that a segmentor, which is sufficiently trained on the well-labeled samples of common bands drawn from a source dataset, can be directly applicable to the custom, band-consistent test cases from a target set. Such a band-consistent hypothesis allows us to present a straightforward solution to the GaoFen-1 segmentation problem by treating the well-labeled Landsat 8 Operational Land Imager dataset as the source and by selecting the fourth, the third, and the second bands, also known as the false-color bands, to construct the band-consistent samples and cases. Furthermore, we attempt to achieve edge-refined segmentation performance on the GaoFen-1 dataset by adopting our prior Refined UNet and v4. We finally verify the effectiveness of the band-consistent hypothesis and the edge-refined approaches by performing a relatively comprehensive investigation, including visual comparisons, ablation experiments regarding bilateral manipulations, explorations of critical hyperparameters within our implementation of the conditional random field, and time consumption in practice. The experiments and corresponding results show that the hypothesis of selecting the false-color bands is effective for cloud and shadow segmentation on the GaoFen-1 data, and that edge-refined segmentation performance of our Refined UNet and v4 can be also achieved.

FUTURE OF TEACHER PROFESSIONAL DEVELOPMENT IN KENYA: STRATEGIC LEADERSHIP APPROACH

The purpose of this study was to examine the place of strategic leadership in the implementation of teacher professional development (TPD). The study was done through a literature review of two kinds: policy documents and published studies. Published studies were identified using Dimensions and Google search engines and through pearl growing. The search queries targeted studies published between 2013 and 2022 whose titles, abstracts, or keywords contained terms related to teachers’ professional development, strategic implementation and strategic leadership in fields of education, business and management. Studies which lacked these terms were deemed irrelevant and excluded. The findings were based on the review, analysis and synthesis of 33 relevant studies. Consensus across multiple studies was that strategic leadership influences strategy implementation which informed the recommendation of strategic leadership in TPD implementation. Threats to TPD implementation such as potential resistance by teachers, misalignment of goals, cost implications and lack of a clear organization structure were established and areas of further research were recommended.<p> </p><p><strong> Article visualizations:</strong></p><p><img src="/-counters-/edu_01/0095/a.php" alt="Hit counter" /></p>

Chloride ion control of under-constructing concrete structure based on ECE with different electric field intensities

Electrochemical chloride extraction (ECE) technology can effectively reduce the harmful chloride ions in concrete and decline the durability failure risk of concrete structures. In this study, early-age sea-sand concrete was treated by ECE with strong electric field and conventional electric field, respectively. The chloride ion content analysis and microscopic observation were adopted to evaluate the durability improvement effect with ECE treatment. The results showed that at the early ages of 3, 5, and 7 d, the chloride ions were drastically reduced upon the application of a strong electric field for 40, 80, and 120 min or the conventional electric field for 15 d. Treating time of ECE with strong electric field is 0.19 %–0.56 % of that of ECE with conventional electric field. Under a strong electric field, the distribution of residual chloride ions in specimens was more uniform. Application of an electric field during the curing period caused the directional migration of ions and subsequently changed the pore structure and microhardness of the specimen. However, these changes were recovered with the continuous hydration of concrete during the curing period. Finally, based on engineering cases, the field implementation schemes of the strong electric field and conventional electric fields were analyzed. The energy consumption of ECE with strong electric field is 17.8 %–53.3 % of that of ECE with conventional electric field. The results of this study provide the technical means for the timely treatment of excessive chloride ion concentration in sea-sand concrete structures.

An improved Chemcatcher-based method for the integrative passive sampling of 44 hydrophilic micropollutants in surface water – Part B: Field implementation and comparison with automated active sampling

Integrative passive sampling is particularly useful in the monitoring of hydrophilic contaminants in surface water, but the impact of hydrodynamics on contaminant uptake still needs to be better considered. In part A (Glanzmann et al., 2023), Chemcatcher-like hydrophilic samplers (i.e., SDB-RPS extraction disks covered by PES microporous membranes) were calibrated to determine the sampling rates RS of 44 hydrophilic contaminants (pesticides, pharmaceuticals, industrial products) taking into account the hydrodynamic conditions. In this study, Chemcatcher-like passive sampling devices that allowed co-deploying hydrophilic samplers and performance reference compounds (PRC)-spiked silicone disks were tested in a Swiss river with intermediate water velocities (5–50 cm s−1, 23 cm s−1 on average) during 11 consecutive 14-day periods. The PRC dissipation from silicone disks – combined with the calibration data from part A – allowed to determine in-situ RS that took into account hydrodynamic conditions. The obtained aqueous time-weighted average (TWA) concentrations were found to be robust with good concordance between duplicates (mean quotient of 1.16 between the duplicates). For most measurements (76 %), TWA concentrations showed no major difference (<factor 2) from concentrations obtained with automated sampling (14-day composite samples). This observation was also valid for TWA concentrations calculated with extrapolated RS at infinite water velocity (RS,MAX), revealing that the added value of using in-situ RS compared to RS,MAX is limited above intermediate water velocities (>20 cm s−1). RS from the literature (RS,LIT) – obtained at water velocities between 8 and 37 cm s−1 – were also shown to provide comparable TWA concentrations in the studied hydrodynamic conditions (average water velocity of 24 cm s−1). The estimated errors due to the use of RS,MAX or RS,LIT rather than in-situ RS are given as a function of the water velocity to determine in which conditions the developed method is required (or not) in monitoring programs.

The impact of personal preference-based thermal control on energy use and thermal comfort: Field implementation

Recent research efforts on modeling personal thermal comfort support the integration of personalized preferences in optimal building control and further implementation in real buildings. This paper presents the development and field implementation of personal preference-based thermal control (i.e., a controller that provides thermal conditions to satisfy personal preferences) in real offices, emphasizing the role of model predictive control (MPC) and low-cost local sensing. Probabilistic thermal preference profiles were developed from experiments collected in identical private offices with controllable VAV systems. A low-cost thermal sensing network and a MPC framework were integrated into a centralized building management and control system. Customized, preference-based HVAC control was then experimentally implemented in the offices to (i) quantify the personal comfort penalty when using conventional wall thermostat versus local sensing-based operation for two distinct thermal preference profiles; (ii) evaluate the impact of personalized MPC (dynamic setpoint) on energy use and personal comfort compared with personalized simple feedback control (static setpoint), using local sensing; (iii) compare the personalized MPC performance for two distinct thermal preference profiles under different weather conditions. The results indicate the comfort benefits of monitoring local thermal conditions (vs wall thermostats) for different preference profiles and showed 28–35% energy savings with personalized MPC (vs personalized static setpoint control). The overall personalized MPC performance (and energy consumption) depends on the personal thermal preference characteristics and outdoor conditions.

Pengembangan Media Interaktif pada Materi Menulis Teks Puisi Siswa Kelas X SMA Al-Washliyah Pasar Senen Medan

&#x0D; &#x0D; &#x0D; &#x0D; The purpose of this study was to find out how the development of interactive media, the feasibility of interactive media in writing poetry text materials to increase the motivation of the students of class X of SMA Al-Washliyah Pasar Senen Medan. This research is a type of research and development using Borg and Gall development model. The steps taken in this development research are: research and collection, planning, draft or product development, initial field trials, revising test results, field trials, final product improvements. The population and the research sample were 23 students. The results showed that the product development was declared feasible based on the results showed that that material expert I gets the “Eligible” score criteria with a percentage (80%) and the material expert II gets the “Enough Eligible” criteria (64%), the results of the media expert assessment I gets the value criteria “Very Eligible” with a percentage (86%) and media expert II gets the criteria for “Eligible” with a percentage (80%). Field implementation test with 23 students of class X SMA Al-Washliyah Pasar Senen Medan gets the criteria of “Very Eligible” with a percentage (90%) and the terachers gets the criteria of “Very Eligible” with a percentage (94%).&#x0D; &#x0D; &#x0D; &#x0D;

A Practical Method to Increase the Low Frequency Sound Insulation of Timber Frame Constructions

Timber framed houses have little or no sound insulation at low frequencies. A significant set of noise sources emit loud low frequency noise and for some of these, the noise is single frequency or tonal. Improvement of the low frequency insulation has been shown using two methods: increasing the stiffness and applying vibration neutralizers to the structure of the house. A study was carried out on a wall element to assess the viability of the method in a simplified test facility. Impedance measurements were carried out on a test section consisting of 3 studs and panel construction. An initial field implementation has been carried out on a re-purposed dwelling at the end of the runway at Bergen's airport. Reductions of the order of 5-10dB in the C-weighted indoor noise level have been achieved. The additional attenuation achieved using vibration neutralisers only has effect when the outside noise level exceeds 87dBC.