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Journal articles on the topic 'Monitoring Tracer'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Wang, Hao. "Preliminary Study on Tracer of High Temperature and High Salinity Resistant." Advanced Materials Research 868 (December 2013): 473–76. http://dx.doi.org/10.4028/www.scientific.net/amr.868.473.

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Five kinds of new tracers of high temperature and high salinity resistant were screened in order to meet tracer monitoring requirements in Tarapoa block at Dorine oilfield, these tracers were evaluated according to the tracer selection criteria, the optimal detection method was also studied in this paper. It showed that new tracers can adapt to high temperature, high salinity of the formation conditions, so as to meet adjacent multi-well groups monitoring requirements. Tracer monitoring can provide basis for the next step implementation of the program and the adjustment of measures, of a brigh

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2

Pang, Yang, Lin Zhao, Yushou Song, Guang Wei, Yehui Han, and Qiang Wang. "Application of Isotope Tracer in Cross-Well Nanometre Tracer Testing." International Journal of Analytical Chemistry 2022 (August 6, 2022): 1–7. http://dx.doi.org/10.1155/2022/6387030.

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In order to understand the dynamic monitoring characteristics and heterogeneity characteristics of injection production wells in the monitoring area and judge the reservoir connectivity, this study puts forward the application method of isotope nanometre tracer in interwell nanometre tracer testing. The trace material nanometre tracer interwell monitoring technology was applied to well block J in a basin. Through the analysis of the morphological characteristics of the nanometre tracer production curve and the quantitative interpretation of trace material tracer, combined with the analysis of

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Li, Linbo, Chao Chen, Xin Tao, et al. "Effect of Salt Solution Tracer Dosage on the Transport and Mixing of Tracer in a Water Model of Asymmetrical Gas-Stirred Ladle with a Moderate Gas Flowrate." Symmetry 16, no. 5 (2024): 619. http://dx.doi.org/10.3390/sym16050619.

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In previous research simulating steelmaking ladles using cold water models, the dosage/volume of the salt tracer solution is one of the factors that has been overlooked by researchers to a certain extent. Previous studies have demonstrated that salt tracers may influence the flow and measured mixing time of fluids in water models. Based on a water model scaled down from an industrial 130-ton ladle by a ratio of 1:3, this study investigates the impact of salt tracer dosage on the transport and mixing of tracers in the water model of gas-stirred ladle with a moderate gas flow rate. A preliminary

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Zhang, Ziming Lv Jun Tian Zhida. "MONITORING MULTISTAGE FRACTURING FLUID FLOWBACK USING TRACERS." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 10 (2017): 406–12. https://doi.org/10.5281/zenodo.1036260.

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Multistage hydraulic fracturing is an important way to stimulate the tight oil and gas reservoir. Due to the number of stages and anisotropy of the long horizontal section, the flowback of each stage is important for the evaluation of the fracturing effect and the next well location deployment. At present, microseismic monitoring technology is a popular evaluation method, it can display the morphology and growth of fractures, but some other technologies are needed to analyze the flowback and production conditions of each stage. In this paper, the tracer monitoring technology is introduced by p

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Ma, Jianhua, Yongzhang Zhou, Yijun Zheng, et al. "Advances in Geochemical Monitoring Technologies for CO2 Geological Storage." Sustainability 16, no. 16 (2024): 6784. http://dx.doi.org/10.3390/su16166784.

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CO2 geological storage, as a large-scale, low-cost, carbon reduction technology, has garnered widespread attention due to its safety. Monitoring potential leaks is critical to ensuring the safety of the carbon storage system. Geochemical monitoring employs methods such as gas monitoring, groundwater monitoring, tracer monitoring, and isotope monitoring to analyze the reservoir’s storage state and secondary changes after a CO2 injection. This paper summarizes the recent applications and limitations of geochemical monitoring technologies in CO2 geological storage. In gas monitoring, the combined

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6

Nurwardani, Mayreyna, Mohammad Khoerul Anwar, Lindra Darnella, and Annisa Mufti Allifa. "Design and Implementation of The Tracer Study System at PTKI." Jurnal Humanitaria Jurnal Ilmu Sosial dan Humaniora 2, no. 1 (2023): 01–12. https://doi.org/10.14421/hum.v2i1.2834.

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This research aims to (1) provide an academic basis for the Indonesian Ministry of Religion's DIKTIS and PTKI to formulate policies related to the importance of alumni trace research; (2) provide a manual for the implementation of tracer studies for PTKIN and PTKI so that the implementation of tracer studies is standardized; and (3) establishing a tracer studies system for PTKI, so that tracer studies can be carried out effectively, easily, efficiently and sustainably. Tracer study is useful for knowing the distribution and monitoring of potential alumni of a university, in this case PTKI and

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7

Wang, Liang, Lingang Lv, and Peng Chen. "A New Method for Determining Production Profiles Based on Intelligent Slow-Release Chemical Tracers." Processes 13, no. 6 (2025): 1705. https://doi.org/10.3390/pr13061705.

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With the development of tracer technology and the improvement of fine management in oil fields, chemical tracer monitoring is widely used to analyze the production profiles in commingled wells and horizontal wells. However, most existing tracer technologies can only determine the production profile and cannot calculate the water cut. This paper proposes an intelligent slow-release chemical tracer monitoring technology and a corresponding interpretation methodology, which can quantify the oil and water production rates and dynamically analyze the water cut of production profiles by simultaneous

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8

ZHOU, Chao. "Fracturing Effect Evaluation Technology and Application based on Distributive Tracer." Chinese Petroleum and Natural Gas Research 1, no. 2 (2022): 23–31. http://dx.doi.org/10.48014/cpngr.20220824001.

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In order to address the difficulty of testing the segmented and layered fracturing productivity in the process of oilfield development,the basic principle of monitoring and evaluating the fracturing effects based on distribution tracer and the supporting process technology are researched,and different types of distribution tracers are injected during the fracturing process.According to the parameters such as the output of tracers,flowback liquid production,and contribution rate,the oil-water production profile and fracture information are determined,thus the segmented (layered) fracturing effe

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9

Jing, Cheng, Qiong Duan, Guangshun Han, Jianfeng Nie, Lu Li, and Mingxu Ge. "Quantitative Interpretation Model of Interwell Tracer for Fracture-Cavity Reservoir Based on Fracture-Cavity Configuration." Processes 11, no. 3 (2023): 964. http://dx.doi.org/10.3390/pr11030964.

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The fracture-cavity combination structure between wells in fracture-cavity reservoirs is complex and changeable. Reliably identifying and quantitatively characterizing the fracture-cavity combination structure between wells has become an important prerequisite for flow channel adjustment in fracture-cavity reservoirs after water channeling and flooding. Aiming at the problems that it is difficult for the existing carving technology to characterize the flow characteristics of the injected fluid in the interwell fracture-cavity composite structure during the production process, and it is difficu

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10

Zang, Dongsong, Vincent Garonne, Martin Barisits, et al. "The ATLAS DDM Tracer monitoring framework." Journal of Physics: Conference Series 396, no. 3 (2012): 032119. http://dx.doi.org/10.1088/1742-6596/396/3/032119.

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11

Giertzuch, Peter-Lasse, Joseph Doetsch, Mohammadreza Jalali, Alexis Shakas, Cédric Schmelzbach, and Hansruedi Maurer. "Time-lapse ground penetrating radar difference reflection imaging of saline tracer flow in fractured rock." GEOPHYSICS 85, no. 3 (2020): H25—H37. http://dx.doi.org/10.1190/geo2019-0481.1.

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The characterization of flow and transport processes in fractured rock is challenging because they cannot be observed directly and hydrologic tests can only provide sparse and local data. Time-lapse ground penetrating radar (GPR) can be a valuable tool to monitor such processes in the subsurface, but it requires highly reproducible data. As part of a tracer injection experiment at the Grimsel Test Site (GTS) in Switzerland, borehole reflection GPR data were acquired in a time-lapse survey to monitor saline tracer flow through a fracture network in crystalline rock. Because the reflections from

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12

Yue, Zhaoyan. "The Release Kinetics of Long-Lasting Tracer Particles in Horizontal Wells." Scientific Journal of Technology 7, no. 2 (2025): 101–11. https://doi.org/10.54691/hwvb0g03.

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In the context of China's ongoing development of unconventional oil and gas reservoirs, horizontal well segmental fracturing technology currently holds a dominant position. Accurate and effective monitoring of fracture parameters and production profiles is imperative for the efficient development of oil and gas resources. Tracer monitoring technology has emerged as a pivotal method for monitoring horizontal wells fractured in tight oil segments. This technology involves the injection of slow-release tracer particles into the fractured fracture, followed by the continuous monitoring of the trac

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Ozenil, Marius, Jonas Aronow, Marlon Millard, et al. "Update on PET Tracer Development for Muscarinic Acetylcholine Receptors." Pharmaceuticals 14, no. 6 (2021): 530. http://dx.doi.org/10.3390/ph14060530.

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The muscarinic cholinergic system regulates peripheral and central nervous system functions, and, thus, their potential as a therapeutic target for several neurodegenerative diseases is undoubted. A clinically applicable positron emission tomography (PET) tracer would facilitate the monitoring of disease progression, elucidate the role of muscarinic acetylcholine receptors (mAChR) in disease development and would aid to clarify the diverse natural functions of mAChR regulation throughout the nervous system, which still are largely unresolved. Still, no mAChR PET tracer has yet found broad clin

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Khmelnitskiy, Vladimir, Nouf AlJabri, and Vera Solovyeva. "Preparation and Selection of Best-Performing Fluorescent-Based Tracers for Oil and Gas Downhole Applications." Processes 10, no. 9 (2022): 1741. http://dx.doi.org/10.3390/pr10091741.

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Cost-efficient tracers with fast and simple detection and quantification methods at low detection limits via on-site detection is a current industrial target for state-of-the-art tracer tests. To bridge the gap between the desired tracer properties and detection limits, we developed a broad spectrum of robust and cost-efficient fluorescent tags to innovate the current reservoir management practices. We engineered new tracers and extended tracer test applications for on-site real-time well-drilling monitoring to label drill cuttings as they are made at the drill-bit face to improve drill-cuttin

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15

Hayes, Patrick. "Case Study: Optimizing Operational Efficiency Through Innovative Production-Monitoring Technologies." Journal of Petroleum Technology 77, no. 04 (2025): 38–41. https://doi.org/10.2118/0425-0038-jpt.

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_ Production monitoring plays a critical role in the oil and gas industry throughout the production life cycle. It ensures optimal operational efficiency, safety, enhanced environmental compliance, and cost-effectiveness by identifying areas of production enhancement throughout the exploration and production processes. The challenges of field development span from the exploration phase to multiwell developments and extend through enhanced oil recovery. When operating within harsh environments, such as deepwater or high-pressure systems, these challenges are amplified. Deploying innovative trac

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16

Xu, Gang, Kongyang Wang, Qiehai Yan, et al. "Research on oil well production analysis based on long-term slow-release tracer." Journal of Physics: Conference Series 2834, no. 1 (2024): 012116. http://dx.doi.org/10.1088/1742-6596/2834/1/012116.

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Abstract Downhole monitoring the production profile is crucial for the development of oil and gas reservoirs. Currently, the commonly methods for monitoring the production profile include logging tools and using tracer monitoring. The tracer monitoring method is more popular in oil field operations due to its wide applicability, simple process, low cost, low risk, and long monitoring time. However, compared to traditional logging tool monitoring methods, tracer monitoring has drawbacks such as data lag, difficulty in downhole installation, and unstable long-term effects. Bohai Oilfield has dev

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17

Devi, Made Diah Arista, I. Gusti Ayu Agung Diatri Indradewi, and I. Ketut Resika Arthana. "Dashboard Monitoring Alumni dengan Teknologi Business Intelligence pada Sistem Tracer Study Undiksha." INSERT : Information System and Emerging Technology Journal 4, no. 1 (2023): 13–25. http://dx.doi.org/10.23887/insert.v4i1.58275.

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Universitas Pendidikan Ganesha mengembangkan sistem survei evaluasi diri berupa sistem informasi tracer study untuk menelusuri riwayat lulusan pada semua program studi dan semua jenjang yang telah diluluskan. Saat ini, sistem tracer study dikelola oleh UPT PKKM Undiksha di bagian Divisi Tracer Study. Tujuan penelitian ini adalah untuk dapat menyampaikan informasi hasil kuesioner lulusan pada sistem tracer study Undiksha menggunakan teknologi business intelligence yang dapat memberikan varian visualisasi data secara ringkas, mudah dipahami dan lebih menarik ke dalam bentuk dashboard monitoring.

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18

Teickner, Henning, Jan Lehmann, Patrick Guth, Florian Meinking, and David Ott. "Recognize the Little Ones: UAS-Based In-Situ Fluorescent Tracer Detection." Drones 3, no. 1 (2019): 20. http://dx.doi.org/10.3390/drones3010020.

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In ecological research, a key interest is to explore movement patterns of individual organisms across different spatial scales as one driver of biotic interactions. While various methods exist to detect and record the presence and movements of individuals in combination with UAS, addressing these for smaller animals, such as insects, is challenging and often fails to reveal information on potential interactions. Here, we address this gap by combining the UAS-based detection of small tracers of fluorescent dyes by means of a simple experiment under field conditions for the first time. We (1) ex

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19

Grabow, G. L., C. R. Mote, W. L. Sanders, J. L Smoot, and D. C. Yoder. "Groundwater Monitoring Network Design Using Minimum Well Density." Water Science and Technology 28, no. 3-5 (1993): 327–35. http://dx.doi.org/10.2166/wst.1993.0435.

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Limited resources for groundwater quality monitoring projects demand definition of groundwater contaminant plumes with a minimum number of sampling wells. The relationship between loss of information (or plume definition error) and degree of reduction in the number of sampling wells has been investigated by the authors. A proprietary sampling design product (E4) was used to select variably sized subsets of sampling wells from two existing natural gradient tracer tests. The tracer plume defined by data from each subset of wells was compared to the plume defined by data from the full set of well

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20

Koepp, Matthias J. "PET tracer technology for monitoring focal epilepsies." Expert Review of Medical Devices 4, no. 2 (2007): 191–200. http://dx.doi.org/10.1586/17434440.4.2.191.

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21

Dugstad, Ø., S. Viig, B. Krognes, R. Kleven, and O. Huseby. "Tracer monitoring of enhanced oil recovery projects." EPJ Web of Conferences 50 (2013): 02002. http://dx.doi.org/10.1051/epjconf/20135002002.

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22

Kracht, O., M. Gresch, and W. Gujer. "Innovative tracer methods for sewer infiltration monitoring." Urban Water Journal 5, no. 3 (2008): 173–85. http://dx.doi.org/10.1080/15730620802180802.

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23

Huseby, Olaf K., Mona Andersen, Idar Svorstol, and Oyvind Dugstad. "Improved Understanding of Reservoir Fluid Dynamics in the North Sea Snorre Field by Combining Tracers, 4D Seismic, and Production Data." SPE Reservoir Evaluation & Engineering 11, no. 04 (2008): 768–77. http://dx.doi.org/10.2118/105288-pa.

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Summary To obtain improved oil recovery (IOR), it is crucial to have a best-possible description of the reservoir and the reservoir dynamics. In addition to production data, information can be obtained from 4D seismic and from tracer monitoring. Interwell tracer testing (IWTT) has been established as a proven and efficient technology to obtain information on well-to-well communication, heterogeneities, and fluid dynamics. During such tests, chemical or radioactive tracers are used to label water or gas from specific wells. The tracers then are used to trace the fluids as they move through the

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24

Wong, P. Y., M. Cheung, T. K. Yip, and A. V. Mee. "Use of 125I-labeled-histamine-cyclosporin C for monitoring serum cyclosporine concentrations in transplantation patients." Clinical Chemistry 32, no. 3 (1986): 492–95. http://dx.doi.org/10.1093/clinchem/32.3.492.

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Abstract We synthesized an 125I-labeled-histamine-cyclosporin C tracer, to obviate the use of tritiated tracer in radioimmunoassay of cyclosporine. With this tracer, the assay results varied linearly with concentration up to at least 800 micrograms/L. The within-assay CV was 6.6% at 39 micrograms/L, 4.2% at 100 micrograms/L, and 7.0% at 300 micrograms/L (n = 15). The between-assay CV was 10.0, 6.4, and 7.8% for the same respective concentrations. Comparison with an assay involving tritiated tracer (x) showed good agreement of results: y = 3.81 + 0.927x (r = 0.975, n = 604). Analytical recovery

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Singha, Kamini, Li Li, Frederick D. Day-Lewis, and Aaron B. Regberg. "Quantifying solute transport processes: Are chemically “conservative” tracers electrically conservative?" GEOPHYSICS 76, no. 1 (2011): F53—F63. http://dx.doi.org/10.1190/1.3511356.

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The concept of a nonreactive or conservative tracer, commonly invoked in investigations of solute transport, requires additional study in the context of electrical geophysical monitoring. Tracers that are commonly considered conservative may undergo reactive processes, such as ion exchange, thus changing the aqueous composition of the system. As a result, the measured electrical conductivity may reflect not only solute transport but also reactive processes. We have evaluated the impacts of ion exchange reactions, rate-limited mass transfer, and surface conduction on quantifying tracer mass, me

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H., B. Chi, F. N. Tajuddin M., H. Ghazali N., Azmi A., and U. Maaz M. "Internet of things (IoT) based i-v curve tracer for photovoltaic monitoring systems." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 3 (2019): 1022–30. https://doi.org/10.11591/ijeecs.v13.i3.pp1022-1030.

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This paper presents a low-cost PV current-voltage or I-V curve tracer that has the Internet of Things (IoT) capability. Single ended primary inductance converter (SEPIC) is used to develop the I-V tracer, which is able to cope with rapidly changing irradiation conditions. The I-V tracer control software also has the ability to automatically adapt to the varying irradiation conditions. The performance of the I-V curve tracer is evaluated and verified using simulation and experimental tests.

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Semenov, Mikhail Y., Yuri M. Semenov, Anton V. Silaev, and Larisa A. Begunova. "Source Apportionment of Inorganic Solutes in Surface Waters of Lake Baikal Watershed." Sustainability 13, no. 10 (2021): 5389. http://dx.doi.org/10.3390/su13105389.

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The aim of this study was to obtain a detailed picture of the origin of the anthropogenic and natural inorganic solutes in the surface waters of the Lake Baikal watershed using limited data on solute sources. To reveal the origin of solutes, the chemical composition of water was considered as a mixture of solutes from different sources such as rocks and anthropogenic wastes. The end-member mixing approach (EMMA), based on the observation that the element ratios in water uncorrelated with one another are those that exhibit differences in values across the different types of rocks and anthropoge

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Humbezi Desfeux, Maïwenn, Manuel Marcoux, Jean-Michel Matray, Josselin Gorny, Philipp Schädle, and Guillaume Pochet. "DIGIT: An In Situ Experiment for Studying the Diffusion of Water and Solutes under Thermal Gradient in the Toarcian Clay Rock at the Tournemire Underground Research Laboratory: Part 1—Goals, Scoping Calculations, Installation and First Results under Unheated Conditions." Minerals 14, no. 6 (2024): 563. http://dx.doi.org/10.3390/min14060563.

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The DIGIT experiment was launched at the Tournemire Underground Research Laboratory URL with the aim of determining the effects of temperature on the transfer of analogues of most mobile radionuclides (i.e., 36Cl, 129I and 79Se) in the Toarcian clay rock, the properties of which are close to host rocks being considered for future deep geological disposal of high-level (HL) radioactive wastes. The experimental principle involves the monitoring of an exchange between a test water traced with stable halides and deuterium at constant concentration and the porewater of the Toarcian clay rock submit

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Killoran, Michael P., Sergiy Levin, Michelle E. Boursier, et al. "An Integrated Approach toward NanoBRET Tracers for Analysis of GPCR Ligand Engagement." Molecules 26, no. 10 (2021): 2857. http://dx.doi.org/10.3390/molecules26102857.

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Gaining insight into the pharmacology of ligand engagement with G-protein coupled receptors (GPCRs) under biologically relevant conditions is vital to both drug discovery and basic research. NanoLuc-based bioluminescence resonance energy transfer (NanoBRET) monitoring competitive binding between fluorescent tracers and unmodified test compounds has emerged as a robust and sensitive method to quantify ligand engagement with specific GPCRs genetically fused to NanoLuc luciferase or the luminogenic HiBiT peptide. However, development of fluorescent tracers is often challenging and remains the pri

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KUBOTA, KAZUO, KIICHI ISHIWATA, SUSUMU YAMADA, et al. "Tumor Radiotherapy Monitoring with Radioscintigraphy Tracers. A Comparative Study with Multiple-Tracer Technique." Tohoku Journal of Experimental Medicine 168, no. 2 (1992): 437–39. http://dx.doi.org/10.1620/tjem.168.437.

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Leedham Elvidge, Emma, Harald Bönisch, Carl A. M. Brenninkmeijer, et al. "Evaluation of stratospheric age of air from CF<sub>4</sub>, C<sub>2</sub>F<sub>6</sub>, C<sub>3</sub>F<sub>8</sub>, CHF<sub>3</sub>, HFC-125, HFC-227ea and SF<sub>6</sub>; implications for the calculations of halocarbon lifetimes, fractional release factors and ozone depletion potentials." Atmospheric Chemistry and Physics 18, no. 5 (2018): 3369–85. http://dx.doi.org/10.5194/acp-18-3369-2018.

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Abstract. In a changing climate, potential stratospheric circulation changes require long-term monitoring. Stratospheric trace gas measurements are often used as a proxy for stratospheric circulation changes via the mean age of air values derived from them. In this study, we investigated five potential age of air tracers – the perfluorocarbons CF4, C2F6 and C3F8 and the hydrofluorocarbons CHF3 (HFC-23) and HFC-125 – and compare them to the traditional tracer SF6 and a (relatively) shorter-lived species, HFC-227ea. A detailed uncertainty analysis was performed on mean ages derived from these ne

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Chi, H. B., M. F. N. Tajuddin, N. H. Ghazali, A. Azmi, and M. U. Maaz. "Internet of things (IoT) based I-V curve tracer for photovoltaic monitoring systems." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 3 (2019): 1022. http://dx.doi.org/10.11591/ijeecs.v13.i3.pp1022-1030.

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<span>This paper presents a low-cost PV current-voltage or <em>I-V</em> curve tracer that has the Internet of Things (IoT) capability. Single ended primary inductance converter (SEPIC) is used to develop the <em>I-V</em> tracer, which is able to cope with rapidly changing irradiation conditions. The <em>I-V</em> tracer control software also has the ability to automatically adapt to the varying irradiation conditions. The performance of the <em>I-V</em> curve tracer is evaluated and verified using simulation and experimental tests.</span&

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Giertzuch, Peter-Lasse, Joseph Doetsch, Alexis Shakas, Mohammadreza Jalali, Bernard Brixel, and Hansruedi Maurer. "Four-dimensional tracer flow reconstruction in fractured rock through borehole ground-penetrating radar (GPR) monitoring." Solid Earth 12, no. 7 (2021): 1497–513. http://dx.doi.org/10.5194/se-12-1497-2021.

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Abstract. Two borehole ground-penetrating radar (GPR) surveys were conducted during saline tracer injection experiments in fully saturated crystalline rock at the Grimsel Test Site in Switzerland. The saline tracer is characterized by an increased electrical conductivity in comparison to formation water. It was injected under steady-state flow conditions into the rock mass that features sub-millimeter fracture apertures. The GPR surveys were designed as time-lapse reflection GPR from separate boreholes and a time-lapse transmission survey between the two boreholes. The local increase in conduc

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Chernokozhev, D. A., K. I. Kuznetsova, R. R. Gazimov, A. S. Zasedatelev, and M. S. Khozyaiov. "MODERN METHODOLOGICAL POSSIBILITIES OF THE TRACER METHOD FOR ASSESSING THE COVERAGE OF AN OIL RESERVOIR BY FLOODING." BULLETIN of Russian Academy of Natural Sciences 21 (April 2021): 24–28. http://dx.doi.org/10.52531/1682-1696-2021-21-1-24-28.

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The article presents the results of modeling tracer studies of the process of flooding of an oil reservoir. As a result of the studies, the dependences on the time of the change in the volume occupied by the injected water were obtained. Formulas are given that allow us to calculate the values of the coefficient of coverage of the reservoir area by flooding as a whole and the contribution of each injection well to flooding. The technology is implemented by continuously pumping the tracer into the injection well. Continuous injection of different tracers into different injection wells allows fo

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Ngasala, Tula M., Mantha S. Phanikumar, and Susan J. Masten. "Improving safe sanitation practices using groundwater transport modelling and water quality monitoring data." Water Science and Technology 84, no. 10-11 (2021): 3311–22. http://dx.doi.org/10.2166/wst.2021.428.

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Abstract In many developing countries, poorly constructed pit latrines are the primary source of groundwater contamination. Approaches are needed to identify site-specific separation distances between domestic wells and pit latrines. In this study, tracer transport simulations are combined with water quality monitoring data to identify separation distances in peri-urban Dar es Salaam. Bivariate correlation and linear regression models were used to find the relationships between (1) simulated tracer and distances from the wells to the nearest pit latrines (2) simulated tracer and observed conta

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Bhuvaneshwari, P., and T. R. Jaya Chandra Lekha. "Design of Advanced High Performance Bus Tracer in System on Chip Using Matrix Based Compression for Low Power Applications." Journal of Computational and Theoretical Nanoscience 17, no. 4 (2020): 1852–56. http://dx.doi.org/10.1166/jctn.2020.8453.

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This project proposes multilayer advanced high-performance bus architecture for low power applications. The proposed AHB architecture consists of the bus arbiter and the bus tracer (A.R.M.A., 1999. Specification (Rev 2.0) ARM IHI0011A). The bus arbiter, which is self motivated selects the input packet based on the control signals of the incoming packet. So that arbitration leads to a maximum performance. The On-Chip bus is an important system-on-chip infrastructure that connects major hardware components. Monitoring the on-chip bus signals is crucial to the SoC debugging and performance analys

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Gibson, Heather, Justin Hackett, Jordan White, et al. "Whole-body immunoPET imaging to monitor immune activation status in situ." Journal of Immunology 204, no. 1_Supplement (2020): 159.5. http://dx.doi.org/10.4049/jimmunol.204.supp.159.5.

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Abstract Advances in immune modulation for cancer and inflammation warrant parallel development of imaging technologies to gauge in situ immune activity. We have developed a toolbox of full-length monoclonal antibody (mAb) positron emission tomography (immunoPET) tracers by desferrioxamine conjugation and 89Zr radiolabeling. Tracer uptake is reported as % injected dose/gram (%ID/g) tissue. Because mAbs to cell surface molecules often facilitate depletion, we tested enzymatic removal of the Fc glycan of CD8 mAb 2.43 to disrupt Fc:FcR interaction and prevent depletion. In the CT26 tumor model, C

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Bailly-Comte, V., X. Durepaire, C. Batiot-Guilhe, and P. A. Schnegg. "In situ monitoring of tracer tests: how to distinguish tracer recovery from natural background." Hydrogeology Journal 26, no. 6 (2018): 2057–69. http://dx.doi.org/10.1007/s10040-018-1748-8.

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Shingai, Takahiko. "Application of tracer monitoring results to field development." Journal of the Japanese Association for Petroleum Technology 75, no. 6 (2010): 444–51. http://dx.doi.org/10.3720/japt.75.444.

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Michael Revitt, D., J. Bryan Ellis, and Nikolaos Paterakis. "Comparison of tracer techniques for monitoring sewer losses." Journal of Environmental Monitoring 8, no. 5 (2006): 564. http://dx.doi.org/10.1039/b600522e.

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Babalonis, Shanna, Aidan Hampson, Michelle R. Lofwall, Paul A. Nuzzo, and Sharon L. Walsh. "Quinine: A potential tracer for monitoring medication adherence." Drug and Alcohol Dependence 146 (January 2015): e212-e213. http://dx.doi.org/10.1016/j.drugalcdep.2014.09.046.

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Rieckermann, J., M. E. Borsuk, and W. Gujer. "Using decision analysis to determine optimal experimental design for monitoring sewer exfiltration with tracers." Water Science and Technology 54, no. 6-7 (2006): 161–68. http://dx.doi.org/10.2166/wst.2006.615.

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The tracer methods developed to assess exfiltration from sewers in the European project APUSS (assessment of the performance of sewer systems) have a high degree of freedom with regard to the choice of tracer and the dosing strategy. These can lead to very different degrees of uncertainty in the measured exfiltration ratio. In this study, we demonstrate how to select an optimal experimental design using decision analysis, which accounts for this uncertainty and its associated costs. Although the results are site-specific, we can conclude generally that, when NaCl is used as the tracer, the acc

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Lauber, U., W. Ufrecht, and N. Goldscheider. "Spatially resolved information on karst conduit flow from in-cave dye tracing." Hydrology and Earth System Sciences 18, no. 2 (2014): 435–45. http://dx.doi.org/10.5194/hess-18-435-2014.

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Abstract. Artificial tracers are powerful tools for investigating karst systems. Tracers are commonly injected into sinking streams or dolines, while springs serve as monitoring sites. The obtained flow and transport parameters represent mixed information from the vadose, epiphreatic and phreatic zones (that is, the aquifer remains a black box). Accessible active caves constitute valuable but underexploited natural laboratories to gain detailed insights into the hydrologic functioning of the aquifer. Two multi-tracer tests in the catchment of a major karst spring (Blautopf, Germany) with injec

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Lauber, U., W. Ufrecht, and N. Goldscheider. "Spatially resolved information on karst conduit flow from in-cave dye-tracing." Hydrology and Earth System Sciences Discussions 10, no. 9 (2013): 11311–35. http://dx.doi.org/10.5194/hessd-10-11311-2013.

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Abstract. Artificial tracers are powerful tools to investigate karst systems. Tracers are commonly injected into sinking streams or dolines, while springs serve as monitoring sites. The obtained flow and transport parameters represent mixed information from the vadose, epiphreatic and phreatic zones, i.e., the aquifer remains a black box. Accessible active caves constitute valuable but underexploited natural laboratories to gain detailed insights into the hydrologic functioning of the aquifer. Two multi-tracer tests in the catchment of a major karst spring (Blautopf, Germany) with injections a

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Stroj, Andrej, Maja Briški, and Maja Oštrić. "Study of Groundwater Flow Properties in a Karst System by Coupled Analysis of Diverse Environmental Tracers and Discharge Dynamics." Water 12, no. 9 (2020): 2442. http://dx.doi.org/10.3390/w12092442.

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Monitoring of various naturally present substances or physical properties of the water, commonly called environmental tracers, can provide valuable insight in characteristics of groundwater flow systems and intrinsic processes. Analysis of individual tracer data most often gives an ambiguous interpretation, but employment of multiple diverse tracers can greatly increase interpretation reliability. We monitored multiple natural tracers including spring water electrical conductivity, temperature, loads of major anions and cations, stable isotopes of water, and total organic carbon together with

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Deja, Stanislaw, Blanka Kucejova, Xiaorong Fu, Jeffrey D. Browning, Jamey D. Young, and Shawn Burgess. "In Vivo Estimation of Ketogenesis Using Metabolic Flux Analysis—Technical Aspects and Model Interpretation." Metabolites 11, no. 5 (2021): 279. http://dx.doi.org/10.3390/metabo11050279.

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Ketogenesis occurs in liver mitochondria where acetyl-CoA molecules, derived from lipid oxidation, are condensed into acetoacetate (AcAc) and reduced to β-hydroxybutyrate (BHB). During carbohydrate scarcity, these two ketones are released into circulation at high rates and used as oxidative fuels in peripheral tissues. Despite their physiological relevance and emerging roles in a variety of diseases, endogenous ketone production is rarely measured in vivo using tracer approaches. Accurate determination of this flux requires a two-pool model, simultaneous BHB and AcAc tracers, and special consi

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Li, Xingrong, Zengsiche Chen, Ya Xu, et al. "Pumping Induced Hydraulic Gradient Driven Tracer Migration through Defects: Implications for Rapid Detection of Leakage in Vertical Flexible Barrier." Water 15, no. 10 (2023): 1882. http://dx.doi.org/10.3390/w15101882.

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Vertical flexible barriers (VFBs) are widely used for contaminant source separation and risk control. Inherent or externally caused damage to a VFB can affect its effectiveness in pollution containment and control, but its effective detection is a major challenge due to its concealed nature. This paper presents a combined pumping and tracer approach to detect defects in VFBs. A high-performance model is used to model the detection process revealing the migration and distribution behavior of the tracer in the triple media system of wellbore–aquifer–VFB to better understand the effectiveness of

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Giertzuch, Peter-Lasse, Alexis Shakas, Joseph Doetsch, Bernard Brixel, Mohammadreza Jalali, and Hansruedi Maurer. "Computing Localized Breakthrough Curves and Velocities of Saline Tracer from Ground Penetrating Radar Monitoring Experiments in Fractured Rock." Energies 14, no. 10 (2021): 2949. http://dx.doi.org/10.3390/en14102949.

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Solute tracer tests are an established method for the characterization of flow and transport processes in fractured rock. Such tests are often monitored with borehole sensors which offer high temporal sampling and signal to noise ratio, but only limited spatial deployment possibilities. Ground penetrating radar (GPR) is sensitive to electromagnetic properties, and can thus be used to monitor the transport behavior of electrically conductive tracers. Since GPR waves can sample large volumes that are practically inaccessible by traditional borehole sensors, they are expected to increase the spat

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Tretyakov, Evgeniy, Alexey Artamonov, Maria Grigorieva, Alexei Klimentov, Shawn McKee, and Ilija Vukotic. "TRACER (TRACe route ExploRer): A tool to explore OSG/WLCG network route topologies." International Journal of Modern Physics A 36, no. 05 (2021): 2130005. http://dx.doi.org/10.1142/s0217751x21300052.

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The experiments at the Large Hadron Collider (LHC) rely upon a complex distributed computing infrastructure (WLCG) consisting of hundreds of individual sites worldwide at universities and national laboratories, providing about half a billion computing job slots and an exabyte of storage interconnected through high speed networks. Wide Area Networking (WAN) is one of the three pillars (together with computational resources and storage) of LHC computing. More than 5 PB/day are transferred between WLCG sites. Monitoring is one of the crucial components of WAN and experiments operations. In the pa

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JAHIER, ERWAN, and MIREILLE DUCASSÉ. "Generic program monitoring by trace analysis." Theory and Practice of Logic Programming 2, no. 4-5 (2002): 611–43. http://dx.doi.org/10.1017/s1471068402001461.

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Program execution monitoring consists of checking whole executions for given properties, and collecting global run-time information. Monitoring gives valuable insights and helps programmers maintain their programs. However, application developers face the following dilemma: either they use existing monitoring tools which never exactly fit their needs, or they invest a lot of effort to implement relevant monitoring code. In this paper, we argue that when an event-oriented tracer exists, the compiler developers can enable the application developers to easily code their own monitors. We propose a

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