218 research outputs found
Analysis of Opportunities and Challenges for R&D Management and the Role of the R&D Society for its Improvement – A Case Study in Iran
Research and Development (R&D) management in Iran is faced to many barriers and obstacles, in which R&D units are considered as the basic core of the product development and innovation. Due to structural shortcomings, a great number of organizations and industries have not been able to find their actual status. There are about different 1141 R&D units with a dispersion pattern in Iran. This paper considers and analyzes the R&D case study in one of the provinces located in the north part of Iran in order to enhance the potential R&D activities in respect with the industrialized areas and zones. In this province, there are about 2504 industrial units of which there are only 44 R&D units certified by the state government. However, there are limit numbers of these R&D units that are extensively active. This paper also addresses the current status in respect with the R&D activities to find out why there is a lack and depression of these activities in the industrial units. By considering the opportunity and challenges of these R&D units, there is a need to change these units to be active in order to quickly respond the market and demand requirements. Finally, a few alternative solutions and improvement plans are proposed, in which the Iranian R&D Society is responsible for supporting and succeeding these action plans towards the organization goals.R&D Management
Using stone column as a suitable liquefaction remediation in Persian Gulf coast.
This research investigates behavior of gravel drain piles under high-level earthquake loading beneath
the structures foundation. To achieve this purpose one of the waste water septic tank project in north
of Persian Gulf in Hormoz Island was selected as a
case study to find suitability of gravel drain pile
system to reduce excess pore water pressure. According to high susceptibility of local soil layers
liquefaction and its short distance of waste water tank to the sea, the mentioned project becomes one
of the most important issues regarding geo-enviro
nmentally hazards impact after tank structural
collapsing. The drain piles were used to control excess pore water pressures beneath the foundation of
mentioned project. Furthermore, different static and cyclic triaxial tests, Standard Penetration Test
(SPT), the hydraulic conductivity and density
tests were conducted to enhance the proper
understanding of the dynamic behavior of soil layer under the foundation. According to the numerical
modeling results, using these drain piles has focal effects on the excess pore water pressure rate and
creates a liquefaction zone during
the time of earthquake loading
What features make Pocket Beaches unique in Terms of Coastal Processes?
Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv
Preconditioning of Bioactive Glasses before Introduction to Static Cell Culture: What Is Really Necessary?
Due to their high bioreactivity, the in-vitro analysis of bioactive glasses (BGs) can be challenging when it comes to maintaining a physiological pH. To improve BG biocompatibility, a heterogenic spectrum of preconditioning approaches, such as “passivation” of the BGs by incubation in cell culture medium, are used but have never been directly compared. In this study, the effect of passivation periods of up to 72 h on pH alkalization and viability of human bone marrow-derived mesenchymal stromal cells was evaluated to determine a time-efficient passivation protocol using granules based on the 45S5-BG composition (in wt%: 45.0 SiO2, 24.5 Na2O, 24.5 CaO, 6.0 P2O5) in different concentrations. pH alkalization was most reduced after passivation of 24 h. Cell viability continuously improved with increasing passivation time being significantly higher after passivation of at least 24 h compared to non-passivated 45S5-BG and the necessary passivation time increased with increasing BG concentrations. In this setting, a passivation period of 24 h presented as an effective approach to provide a biocompatible cell culture setting. In conclusion, before introduction of BGs in cell culture, different passivation periods should be evaluated in order to meet the respective experimental settings, e.g., by following the experimental protocols used in this study
Improving Residential Load Disaggregation for Sustainable Development of Energy via Principal Component Analysis
The useful planning and operation of the energy system requires a sustainability assessment of the system, in which the load model adopted is the most important factor in sustainability assessment. Having information about energy consumption patterns of the appliances allows consumers to manage their energy consumption efficiently. Non-intrusive load monitoring (NILM) is an effective tool to recognize power consumption patterns from the measured data in meters. In this paper, an unsupervised approach based on dimensionality reduction is applied to identify power consumption patterns of home electrical appliances. This approach can be utilized to classify household activities of daily life using data measured from home electrical smart meters. In the proposed method, the power consumption curves of the electrical appliances, as high-dimensional data, are mapped to a low-dimensional space by preserving the highest data variance via principal component analysis (PCA). In this paper, the reference energy disaggregation dataset (REDD) has been used to verify the proposed method. REDD is related to real-world measurements recorded at low-frequency. The presented results reveal the accuracy and efficiency of the proposed method in comparison to conventional procedures of NILM
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