scholarly journals Notes On the Use and Performance of Thermal Instrumentation: Experience From the Norman Wells Pipeline Ground Temperature Monitoring Program

1991 ◽  
Author(s):  
M M Burgess ◽  
V S Allen
Keyword(s):  
Monitoring Program ◽  
Temperature Monitoring ◽  
Ground Temperature ◽  
And Performance

Design and performance of deep well dewatering: a case study

1998 ◽  
Vol 35 (1) ◽  
pp. 81-95 ◽  
Author(s):  
D W Sargent ◽  
R D Beckie ◽  
G Smith
Keyword(s):  
Soil Mechanics ◽  
Data Gathering ◽  
Monitoring Program ◽  
Treatment Plant ◽  
Pumping Test ◽  
Observational Method ◽  
Design Development ◽  
Deep Well ◽  
And Performance

This paper reviews the process used to design the construction dewatering system at the Influent Pumping Station at Annacis Island Wastewater Treatment Plant. The design process followed the "observational method," as applied to soil mechanics by K. Terzaghi and set out by R.B. Peck in the Ninth Rankine Lecture. The design was based on a working hypothesis of behaviour anticipated under the most probable conditions identified in the data gathering and assessment program. The sensitivity of the design was evaluated by considering potentially unfavourable conditions evident in the available data. The design development included a review of monitoring feedback obtained during the pumping-well installation, a pumping test, and the dewatering system start-up. The monitoring program and review process are presented.Key words: dewatering, observational method, case study, pumping test.

Evaluation of Real-World Smart Sock-Based Temperature Monitoring Data as a Physiological Indicator of Early Diabetic Foot Injury: Case-Control Study (Preprint)

2021 ◽  
Author(s):  
Alexander M Reyzelman ◽  
Chia-Ding Shih ◽  
Gregory Tovmassian ◽  
Mohan Nathan ◽  
Ran Ma ◽  
...  
Keyword(s):  
Diabetic Foot ◽  
Monitoring Program ◽  
Temperature Monitoring ◽  
Lower Extremity Injury ◽  
Study Cohort ◽  
Temperature Differential ◽  
Comparator Group ◽  
Foot Injury ◽  
Useful Signal ◽  
Significant Difference

BACKGROUND Diabetic foot ulcers represent major health care complications both in terms of cost and impact to quality of life for patients with diabetic peripheral neuropathy. Temperature monitoring has been shown in previous studies to provide a useful signal of inflammation that may indicate the early presence of a foot injury. OBJECTIVE In this study we evaluated the temperature data for patients that presented with a diabetic foot injury while utilizing a sock-based remote temperature monitoring device. METHODS The study abstracted data from patients enrolled in a remote temperature monitoring program in year 2020-2021 using a smart sock (Siren Care, San Francisco, California, USA). In the study cohort, a total of 5 participants with a diabetes-related lower extremity injury during study period were identified. In the second comparison cohort, a total of 26 patients met the criteria for monitoring by the same methods that did not present with a diabetes-related podiatric injury during the same period. The 15-day temperature differential between six defined locations on each foot was the primary outcome measure among subjects who presented a diagnosed foot injury. Paired t-tests were used to compare the differences between the two groups. RESULTS A significant difference in temperature differential was observed in the group that presented with a podiatric injury over the course of evaluation vs. the comparator group that did not present with a podiatric injury with temperature measured in °F. The average difference from all six measured points was 1.4°F between the injury group (mean 3.6 +/- 3.0) and the comparator group (mean 2.2 +/- 2.5, t=-71.4; P<.000). CONCLUSIONS The presented study demonstrated significant temperature difference for patients presenting with a foot injury in a 15-day period prior to the diagnosis of an injury compared with a similar period for patients without an injury. The findings suggest temperature monitoring may be a predictor of a developing foot injury. The continuous temperature monitoring system employed has implications for further algorithm development to enable early detection. The study was limited by a nonrandomized, observational design with limited injuries present in the study period.

Ground thermal contrasts and variability at an alpine pyramidal peak in central Austria (Innerer Knorrkogel, Venediger Mountains)

2021 ◽  
Author(s):  
Andreas Kellerer-Pirklbauer ◽  
Gerhard Karl Lieb
Keyword(s):  
Snow Cover ◽  
Thermal Regime ◽  
Ground Surface ◽  
Temperature Monitoring ◽  
Ground Temperature ◽  
Freeze Thaw ◽  
Ground Temperatures ◽  
Frost Weathering ◽  
Second Year ◽  
Ridge Flank

&lt;p&gt;Ground temperatures in alpine environments are severely influenced by slope orientation (aspect), slope inclination, local topoclimatic conditions, and thermal properties of the rock material. Small differences in one of these factors may substantially impact the ground thermal regime, weathering by freeze-thaw action or the occurrence of permafrost. To improve the understanding of differences, variations, and ranges of ground temperatures at single mountain summits, we studied the ground thermal conditions at a triangle-shaped (plan view), moderately steep pyramidal peak over a two-year period (2018-2020).&lt;/p&gt;&lt;p&gt;We installed 18 monitoring sites with 23 sensors near the summit of Innerer Knorrkogel (2882m asl), in summer 2018 with one- and multi-channel datalogger (Geoprecision). All three mountain ridges (east-, northwest-, and southwest-facing) and flanks (northeast-, west-, and south-facing) were instrumented with one-channel dataloggers at two different elevations (2840 and 2860m asl) at each ridge/flank to monitor ground surface temperatures. Three bedrock temperature monitoring sites with shallow boreholes (40cm) equipped with three sensors per site at each of the three mountain flanks (2870m asl) were established. Additionally, two ground surface temperature monitoring sites were installed at the summit.&lt;/p&gt;&lt;p&gt;Results show remarkable differences in mean annual ground temperatures (MAGT) between the 23 different sensors and the two years despite the small spatial extent (0.023 km&amp;#178;) and elevation differences (46m). Intersite variability at the entire mountain pyramid was 3.74&amp;#176;C in 2018/19 (mean MAGT: -0.40&amp;#176;C; minimum: -1.78&amp;#176;C; maximum: 1.96&amp;#176;C;) and 3.27&amp;#176;C in 2019/20 (mean MAGT: 0.08&amp;#176;C; minimum: -1.54&amp;#176;C; maximum: 1,73&amp;#176;C;). Minimum was in both years at the northeast-facing flank, maximum at the south-facing flank. In all but three sites, the second monitoring year was warmer than the first one (mean +0.48&amp;#176;C) related to atmospheric differences and site-specific snow conditions. The comparison of the MAGT-values of the two years (MAGT-2018/19 minus MAGT-2019/20) revealed large thermal inhomogeneities in the mountain summit ranging from +0.65&amp;#176; (2018/19 warmer than 2019/20) to -1.76&amp;#176;C (2018/19 colder than 2019/20) at identical sensors. Temperature ranges at the three different aspects but at equal elevations were 1.7-2.2&amp;#176;C at ridges and 1.8-3.7&amp;#176;C at flanks for single years. The higher temperature range for flank-sites is related to seasonal snow cover effects combined with higher radiation at sun-exposed sites. Although the ground temperature was substantially higher in the second year, the snow cover difference between the two years was variable. Some sites experienced longer snow cover periods in the second year 2019/20 (up to +85 days) whereas at other sites the opposite was observed (up to -85 days). Other frost weathering-related indicators (diurnal freeze-thaw cycles, frost-cracking window) show also large intersite and interannual differences.&lt;/p&gt;&lt;p&gt;Our study shows that the thermal regime at a triangle-shaped moderately steep pyramidal peak is very heterogeneous between different aspects and landforms (ridge/flank/summit) and between two monitoring years confirming earlier monitoring and modelling results. Due to high intersite and interannual variabilities, temperature-related processes such as frost-weathering can vary largely between neighbouring sites. Our study highlights the need for systematic and long-term ground temperature monitoring in alpine terrain to improve the understanding of small- to medium-scale temperature variabilities.&lt;/p&gt;

Fatigue Monitoring and Life Extension for Top Tensioned Production Riser Systems

2021 ◽  
Author(s):  
Bulent Mercan ◽  
Mike Campbell ◽  
Clay Thompson
Keyword(s):  
Deep Water ◽  
Low Cost ◽  
Monitoring Program ◽  
Field Measurements ◽  
Fatigue Loading ◽  
Life Extension ◽  
Fatigue Monitoring ◽  
One Step ◽  
And Performance ◽  
The Impact

Abstract Top tensioned production riser (TTR) systems are exposed to fatigue loading in deep water as a result of vessel motions and high currents. The accuracy of predictions of the in-place fatigue response, which is a key input for any life extension requests, is dependent on the operating condition during the life of field including fluid contents and top tension. One solution to reduce this uncertainty is to deploy a fatigue monitoring system to assure the long-term integrity and performance of these riser systems. This paper presents results from a recent TTR monitoring campaign and focuses on the impact of top tension variation on riser motion and fatigue response in the field. Standalone and ROV deployable motion loggers offer a low cost and robust method of fatigue monitoring. The motion loggers are installed at discrete locations along the TTR to measure riser motions and then determine fatigue accumulations. During one of the recent monitoring campaigns, riser top tension was changed due to operational requirements, which in turn affected the riser fatigue response in the field. Field data is collected from two periods for two TTRs. The top tension was adjusted between each campaign allowing the effect of tension on riser fatigue response to be better understood using field measurements. The resulting riser motions and fatigue accumulations will be presented to demonstrate the sensitivity to top tension and highlight the importance of maintaining good records during the field life. Currently, there is no single guideline in the US that addresses TTR life-extension programs in detail. The results from this monitoring program are one step forward in better understanding system behavior of deep water TTRs and assessing the feasibility of an extended service life.

The Monitoring Data Analysis of the Running Condition in Winter in Line with the Demonstration Project about Soil Source Heat Pump in Severe Cold Regions

2014 ◽  
Vol 672-674 ◽  
pp. 441-445
Author(s):  
Kai Lin Huang ◽  
Mao Chen ◽  
Ye Liu
Keyword(s):  
Heat Pump ◽  
Monitoring Program ◽  
Demonstration Project ◽  
Monitoring Data ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Cold Regions ◽  
Heat Pump System ◽  
Ground Source ◽  
And Performance

In order to clarify the operation and performance of ground source heat pump in severe cold regions, the paper based on the demonstration project about ground source heat pump at Yifu teaching building of Jilin Jianzhu University, expounds the profile of the demonstration project and the data monitoring program of the system about ground source heat pump, shows monitoring data of the running condition in winter in line with the demonstration project and analyses the monitoring data briefly. The result shows that the heating effect of ground source heat pump system is favorable and ground source heat pump system is obviously environmental and energy saving.

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