v-fold Articles

  • Confirming Natural Attenuation Processes at a Coastal Site - Case Study

    Past waste disposal practices at a California coastal site resulted in a groundwater plume containing CVOCs (mainly chlorinated ethenes [CEs] and 1,1-dichloroethane) migrating offshore towards a marine harbor. CVOCs are present in the sediment porewater adjacent to the shoreline, but concentrations decreased significantly between 2000 and 2015, and NA in the marine sediments was suspected. To ...


    By SIREM

  • How dangerous is blue green algae?

    Blue green algae is one of the popular parameters that can be tested using our water monitoring equipment. It is a common water pollutant that can have a severe impact on ecosystems and plant and animal life. Read more in our exclusive LinkedIn article, where our MD Craig Harrison explains in detail just ...


    By AQUAREAD Limited

  • Repeatability is King: Up to Tenfold Improvement

    Axetris has improved the repeatability specifications of its mass flow meters and controllers. Repeatability often more important than absolute accuracy Repeatability provides information about the precision, that is, the absolute difference between a pair of repeated test results measured by one instrument under unchanged conditions. To measure precision, the same ...


    By Axetris Ag

  • Geoweb base stabilization solution for soft subgrades New Mexico - Case Study

    Overcoming Site Challenges: Time Constraints Extremely Soft Subgrades Shallow Underground Utilities Geoweb System Strengthens Highway Subgrade The Project New Mexico’s State Highway and Transportation Department (NMSH&TD) made news with innovative financing and a record setting ...


    By Presto Geosystems

  • A history of chemically resistant membranes

    The use of polymeric membranes for filtration of non-aqueous solutions started around 1960 and has been developed significantly since then [1]. Today, non-aqueous membrane filtration applications in chemical and pharmaceutical processing account for more than 25% of the global total polymeric membrane market [2]. ...


    By Sterlitech Corporation

  • Western gateway storage company first to save with Evapcold - Case Study

    The best solution for freezer and cooler applications Western Gateway Project Specifications Equipment: (2) LCR-060P-L20-2H-W Evapcold Units (2) ATWB 9-7K12 Fluid Coolers Capacity: 70 TR per LCR Unit x (2) = 140 TR max capacity Charge: 290 lbs. NH3 per LCR Unit x (2) = 580 lbs. NH3 vs. 3500 lbs. NH3 ...


    By Evapco Inc.

  • What can you achieve with a solar system and battery?

    People often ask us about energy self-sufficiency. Just how hard is it to get to that point where you no longer have to pay a large corporation each time you turn on the kettle? This will depend on your usage patterns but for most people, a mix of renewable systems is the best option. We’ve taken a look at Gabriel’s home renewable systems as an example. Perhaps unsurprisingly, Gabriel ...


    By SunGift Solar Ltd

  • Case Report: ESM30 in lake monitoring

    Background Wuhan is the capital city of Hubei province in central China and has 166 lakes that cover 2,217 square km (856 square miles) and approximately 25% of the city.  This surface water coverage is one of the world’s highest.   The Wuhan Environmental Protection Bureau (WHEPB website: http://www.whepb.gov.cn) is responsible for monitoring the surface water ...


    By Oceanalpha Co., Ltd.

  • Title V Compliance

    Title V of the Clean Air Act Amendments assimilates all the contents of a facility's state operating permit into one binding document, in an effort to simplify permit compliance certification. However, submittal of annual compliance certification is a labor-intensive process that places significant pressure on EH&S personnel responsible for ensuring that a facility meets all the conditions in its ...

  • Renaissance of paper models and folded plate structures in glass

    This paper presents the development of glass folded plate structures. Glass will not only be used as a transparent covering but as a load-bearing element for the whole structure. A complete outline ranging from the architectural approach including simple paper models to structural analysis will be presented. The structural concept and its functional characteristics will be confirmed by finite ...


    By Inderscience Publishers

  • Oxidation v. reduction: how to decide?

    Is in-situ chemical oxidation (ISCO) or in-situ chemical reduction (ISCR) the best option for your site? What factors should be considered to make such a decision? Many chlorinated hydrocarbon compounds (CHCs) can be degraded via oxidative or reductive processes. Accordingly, various ISCO technologies using oxidizing agents such as hydrogen peroxide (Fenton’s chemistry), permanganate, ozone or ...


  • Software review: dips v.5.0

    Dips (5.0) for WINDOWS is the latest version of the brawny steregraphic projection program from Roescience'. It comes packed with enoough functionality to provide solutions to the most complex problems in the fields of Earth Sciences or Engineering requiring the analysis of orientation based data. Dip has obviou applications in the fields of: Stability/instability investigations in mining or ...


    By Rocscience Inc.

  • A folded wedge model for determination of true stratigraphic thickness in directional wells

    For exploration and development the geologists and engineers try to know the true stratigraphic thickness (t). The monoclinal and folded bed models are published methods for t calculation. Both models assume parallel beds which can lead to significant deviations. In order to calculate the values of t considering the effects of both folding and stratigraphic variation we propose the 'folded wedge ...


    By Inderscience Publishers

  • When to Hold and When to Fold - Considerations When Contemplating a Job Change

    An environmental professional recently called me for career advice on making a job change. He has a secure job working for a federal agency, but was bored and wanted to work for an organization "with a corporate culture that truly is in sync with sustainable development." Should he make the move, and if so, which are the best companies? I answered, "No, wait until the economy improves, build both ...

  • Collapsible crate mold, folding crate mold, foldable crate mold maker

    Folding crate, foldable crate, turnover box with collapsible design. In order to suitable to your businesses limited space, you should buy a storage container that ...


    By Focare Mould Co.,Ltd.

  • Power-fold actuator noise diagnostics using statistical envelope analysis

    A good correlation between subjective evaluation and objective test is a key for any machine condition monitoring and fault diagnosis process. This paper proposes a statistical envelope analysis approach for product quality control where Fourier spectrum is selected as diagnosis analysis characteristics. The acceptance amplitude envelope is statistically calculated from the measured random ...


    By Inderscience Publishers

  • Do You Know the 4 V’s of Big Data?

    From professional sports, to advertising, to investment banking and almost everything in between. Big data is driving thousands of decisions each day that impact us all in areas big and small. But what is big data exactly, and how or why should it impact efforts in the realm of health and safety? First a definition of big data itself. Big data is a term that began to emerge over the last decade ...


    By Intelex Technologies Inc.

  • Rain Gauge Fixed with 12 V Regulator

    A friend came to me with a curious problem regarding the research weather stations he maintains. The Geonor rain gauges were experiencing glitches. Some of his stations exhibited only occasional problems, and others were failing almost daily. In the plot below, the rain gauge output is in blue. It should be a steady, increasing line representing the weight of the accumulated precipitation. ...


    By Dyacon, Inc.

  • Release Announcement – SymphoniePRO Desktop Application V.3.0

    We are excited to share the latest version of software for the SymphoniePRO Data Logger. This release, version 3.0, introduces exciting new ...


    By Renewable NRG Systems

  • Symposium: Whitman v. American Trucking Association (PDF)

    In Whitman v. American Trucking Associations, Inc., the Supreme Court upheld traditional interpretations of §109 of the Clean Air Act, ruling that EPA may consider only public health and safety in setting ambient air quality standards and it may not engage in a cost-benefit analysis, as urged by industry groups. Also, contrary to the decision of the D.C. Circuit, the high Court ruled that EPA’s ...


    By Bergeson & Campbell, P.C.

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