Chart Chiemchaisri Articles | Environmental XPRT

Drinking water quality control: control charts for turbidity and pH

Water treatment processes are required to be in statistical control and capable of meeting drinking water specifications. Control charts are used to monitor the stability of quality parameters by distinguishing the in-control and out-of-control states. The basic assumption in standard applications of control charts is that observed data from the process are independent and identically ...

Sep. 26, 2016

By IWA Publishing

A Brief History of Stevens' 116 Year Chart Recorder Legacy

The legendary mechanical chart recorder for environmental monitoring dates back to 1911, when John C. Stevens invented the Type A chart recorder. In 1906, J.C. Stevens was the Hydrographer for the USGS out of Portland, Oregon, and was soon promoted to District Engineer. While with the USGS, he realized that hiring local citizens to observe and record height of water was not accurate or reliable. ...

Feb. 26, 2018

By Stevens Water Monitoring Systems, Inc.

Simplification of Soil Classification Charts Derived from the Cone Penetration Test

This paper presents a semi-empirical approach to simplify existing CPT and PCPT soil classification charts. This approach is based on two tendencies in current charts, namely soil type and in situ soil state. These charts may be simplified into one-dimensional soil classification systems by linear conformal mapping. Accordingly, several charts are simplified, and a comparison to in situ testing ...

Jun. 1, 1996

By ASTM International

The Right Chart for the Right Time

One of the biggest challenges for all professionals, including those in EHSQ, is determining the best way to leverage data to support your decisions and ideas. Data is the driving force behind most business decisions today, and it’s imperative that we all be able to use it to strengthen rather than confuse our positions. Data visualizations are a great way to turn confusing data into ...

Nov. 28, 2016

By Intelex Technologies Inc.

A variable sampling interval S<SUP><SMALL>2</SMALL></SUP>-EWMA control chart for monitoring the process variance

A variable sampling interval S²-EWMA control chart for monitoring the process variance

This paper proposes a Variable Sampling Interval version of the Fixed Sampling Interval S2-EWMA control chart developed by Castagliola (2004) and dedicated to the monitoring of the sample variance of a process. In this paper, we explain how the various parameters of this VSI S2-EWMA control chart can be computed and how the use of the VSI feature significantly improves the statistical efficiency ...

Dec. 27, 2006

By Inderscience Publishers

Schedule performance measurement based on statistical process control charts

In a job–shop environment, achieving a schedule that is on target is difficult due to the dynamism of factors affecting the system. In this paper the Shewart's Individuals control chart is applied to a scheduling process for the purpose of measuring schedule performance. The charts are applied to monitor the deviations of actual from scheduled process times for jobs on a process machine. Data ...

Jan. 20, 2015

By Inderscience Publishers

Chart Ferox Becomes Official Sales Channel for Analox Sensor Technology

Gas detection experts, Analox Sensor Technology have signed up Chart Ferox, the European arm of the business, to their worldwide network of sales channels. The recently secured deal allows Flow Instruments, a Chart Industries Company, to supply Analox’s fixed CO2 and inert gas monitoring equipment, alongside their development, production and distribution of flow measurement systems ...

Feb. 28, 2017

By Analox Sensor Technology

Visualizing Your Data with EHS Software

When you're teaching teams about environmental, health and safety (EHS) metrics, data visualization is essential because you're reaching people of different ages, educational levels and they might even speak different languages. As you are presenting safety statistics, you want to make sure all stakeholders are responsive, alert, and in tune with your materials to help the environment, prevent ...

Jul. 29, 2015

By EHS Insight

Comparative studies of control charts for torque data in automotive component assembling

This paper originates from a real case study, in which the torque required for assembling automotive components has to be monitored. Since the data collected are truncated from below, this paper compares three different methods to design control charts for truncated data. The first method is the I-MR control chart. The second and third approaches proposed in this paper are based on estimating ...

Dec. 27, 2006

By Inderscience Publishers

CTXL SUPERECORDER Takes Circular Chart Recording to the Nest Level

Chart recorders are a familiar sight in manufacturing plants, where they track such variables as temperature, pressure, flow, pH, and humidity. Laboratories, meanwhile, use them to monitor scientific and engineering data generated in testing, diagnostics, statistical analysis, and other work requiring a graphic record. Omega Engineering has long been a force in chart recording, and with the ...

Jan. 1, 2005

By Omega Engineering Inc.

World Greenhouse Gas Emissions in 2005

World Greenhouse Gas Emissions in 2005 is a comprehensive view of global, anthropogenic greenhouse gas (GHG) emissions. The chart in this working paper is an updated version of the original chart, which appeared in Navigating the Numbers: Greenhouse Gas Data and International Climate Policy (WRI, ...

Jul. 1, 2009

By World Resources Institute WRI

A control chart for severity index to detect drought compares favourably to logistic regression

We describe the discovery of how a traditional control chart for the Palmer Drought Severity Index (PDSI) to detect drought compares favourably to a theoretically appropriate statistical (logistic regression) model of drought as a function of PDSI. Our empirical results are based on monthly observations of PDSI, precipitation and temperature made in Kansas since 1895. Results from the study ...

Jan. 1, 2011

By IWA Publishing

Detectable Dissolved Metals REX Periodic Chat

Detectable Metals with AMDS REX Analysis - Periodic Chart This chart provides a look at the levels of trace metals that AMDS's REX can detect with in a nominal 1 hour period. It's legend lists the filters combinations and level of detection from ppm to ppb. Real-time detection allows immediate intervention on a time scale of 10-20 measurements per day: ...

Apr. 23, 2014

By American Micro Detection Systems, Inc. (AMDS)

8 charts and maps show why drought will be a growing challenge in the U.S.

The American West continues to struggle with an historic, years-long drought, with the latest area to be hit — the Pacific Northwest — garnering recent headlines. But is drought in the United States all that unusual? A report from The Hamilton Project released in late 2014 examines the history of drought across the U.S. and the economics of water in the country. As the report ...

Jul. 23, 2015

By Ensia

Analox prepare to be a ‘Mogul’ At Summit on the Slopes

Dust off your skis, polish your snowboards and prepare to slalom down the mountains for gasworld’s CO2 Summit on the Slopes. The event, which takes place between 6-7 March at the Interalpen Hotel Tyrol in Innsbruck, Austria, will bring together industry professionals to debate current topics and issues in the carbon dioxide market and supply chain, and perhaps indulge in a little ...

Feb. 2, 2017

By Analox Sensor Technology

An empirical index to evaluate the sustainability of mining projects

This paper describes a new experimental index (the Project Evaluation Index (PEI)), defined to evaluate mining projects. The methodology is based on the use of cash flow charts to calculate the net values of investment projects. The proposal is to apply this methodology not only to economic aspects but also to the social situation, in addition to environmental and associated risks, and creating ...

Jul. 14, 2008

By Inderscience Publishers

An efficient monitoring concept with control charts for on-line sensors

Abstract: A monitoring concept for on-line sensors will be discussed which helps the WWTP staff to detect drift-, shift- and outlier effects as well as unsatisfactory calibration curves. The approach is based on the analysis of comparative measurements between the sensor and a reference method. It combines statistical analysis such as control charts and regression analysis with decision support ...

Jan. 1, 2002

By inCTRL Solutions Inc.

Climate Change Driving Weather off the Charts

Meteorologists are calling the typhoon that slammed into the Philippines with 195-mile-an-hour winds on November 8, 2013, the most powerful tropical storm to make landfall on record. Super Typhoon Haiyan had gusts reaching 235 miles per hour and a storm surge swelling as high as 20 feet, so the destruction it left behind matched that of a tornado combined with a tsunami. Three days later, at the ...

Nov. 18, 2013

By Earth Policy Institute

Power estimation for air cooling and dehumidification using exergy analysis

This paper presents a theoretical analysis based on the second law of thermodynamics to estimate the minimum work required for air cooling and dehumidification. Isothermal dehumidification and sensible cooling processes can be combined to give an equivalent path capable of representing the conventional air conditioning process in hot and humid climates. Dehumidification is analysed as a ...

Jul. 12, 2006

By Inderscience Publishers

Find suppliers and Potential Target Customers By Global Trading Data

Import Export Trade Database Of 33 Trading Countries And Regions Our enormous trade intelligence database integrates over 8,000,000 entries every month from 33 countries importing and exporting from the global and updates monthly, you can know the buyer's shipping data as like purchase price, purchase volume, cycle, supply chain and other detailed real records. And intelligent trade analysis ...

Sep. 3, 2019

By NCB Consultation Co., Ltd