Origin, implications and management strategies for nitrate pollution in surface and ground waters of Anthemountas basin based on a δ15N-NO3− and δ18O-NO3− isotope approach

Groundwater quality deterioration by nitrate pollution due to the intensive use of fertilizers in agriculture, release of untreated urban sewage and industrial wastewater, and atmospheric deposition is a worldwide concern. The urbanized and industrialized Monterrey valley has a long record of elevated nitrate concentrations in groundwater with multiple potential pollution sources. This study aimed to fingerprint different sources and transformation processes of nitrate pollution in Monterrey using a suite of chemical and isotopic tracers (&#948;2H-H2O, &#948;18O-H2O, &#948;15N-NO3, &#948;18O-NO3) combined with a Bayesian isotope mixing model. The results suggest that soil nitrogen and sewage were the most important nitrate sources. However, the concentrations of nitrate were controlled by denitrification processes in the transition and discharge zones. The approach followed in this study is useful for establishing effective pollution management strategies in contaminated aquifers.

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Global patterns of nitrate isotope composition in rivers and adjacent aquifers reveal reactive nitrogen cascading

Communications Earth & Environment ◽

10.1038/s43247-021-00121-x ◽

2021 ◽

Vol 2 (1) ◽

Cited By ~ 1

Author(s):

Ioannis Matiatos ◽

Leonard I. Wassenaar ◽

Lucilena R. Monteiro ◽

Jason J. Venkiteswaran ◽

Daren C. Gooddy ◽

...

Keyword(s):

Isotope Composition ◽

Management Strategies ◽

Nitrogen Sources ◽

Nitrate Pollution ◽

Biogeochemical Processes ◽

N Source ◽

Biogeochemical Transformations ◽

Patterns And Processes ◽

Source Signals ◽

Nitrate Isotope

AbstractRemediation of nitrate pollution of Earth’s rivers and aquifers is hampered by cumulative biogeochemical processes and nitrogen sources. Isotopes (δ15N, δ18O) help unravel spatiotemporal nitrogen(N)-cycling of aquatic nitrate (NO3−). We synthesized nitrate isotope data (n = ~5200) for global rivers and shallow aquifers for common patterns and processes. Rivers had lower median NO3− (0.3 ± 0.2 mg L−1, n = 2902) compared to aquifers (5.5 ± 5.1 mg L−1, n = 2291) and slightly lower δ15N values (+7.1 ± 3.8‰, n = 2902 vs +7.7 ± 4.5‰, n = 2291), but were indistinguishable in δ18O (+2.3 ± 6.2‰, n = 2790 vs +2.3 ± 5.4‰, n = 2235). The isotope composition of NO3− was correlated with water temperature revealing enhanced N-cascading in warmer climates. Seasonal analyses revealed higher δ15N and δ18O values in wintertime, suggesting waste-related N-source signals are better preserved in the cold seasons. Isotopic assays of nitrate biogeochemical transformations are key to understanding nitrate pollution and to inform beneficial agricultural and land management strategies.

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Improving Speech and Language Services through Effective Time Management

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.1402.86 ◽

1983 ◽

Vol 14 (2) ◽

pp. 86-91 ◽

Cited By ~ 1

Author(s):

Barbara W. Travers

Keyword(s):

Time Management ◽

Management Strategies ◽

Federal State ◽

Speech Language Pathologist ◽

School Based ◽

Work Area ◽

Paper Work ◽

Areas Of Concern ◽

State And Local ◽

Therapeutic Services

This paper presents strategies for increasing the effectiveness and efficiency of the school-based speech-language pathologist. Various time management strategies are adapted and outlined for three major areas of concern: using time, organizing the work area, and managing paper work. It is suggested that the use of such methods will aid the speech-language pathologist in coping with federal, state, and local regulations while continuing to provide quality therapeutic services.

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A Case Study: Unique Challenges of an Adolescent Female With Autism Spectrum Disorder

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2019_persp-19-00132 ◽

2020 ◽

Vol 5 (1) ◽

pp. 314-325

Author(s):

Kimberly F. Frazier ◽

Jessica Collier ◽

Rachel Glade

Keyword(s):

Autism Spectrum Disorder ◽

Cognitive Abilities ◽

Social Cognitive ◽

Social Performance ◽

Management Strategies ◽

Autism Spectrum ◽

Spectrum Disorder ◽

Self Management ◽

Adolescent Female ◽

Social Thinking

Background The aim of this study was to determine the clinical efficacy of combining self-management strategies and a social thinking approach to address the social performance and executive function of an adolescent female with autism spectrum disorder. Method This research examined the effects of a social knowledge training program, “Think Social,” as well as strategies to improve higher order cognitive abilities. Results and Conclusion Although quantitative improvement was not found, several qualitative gains in behavior were noted for the participants of this study, suggesting a benefit from using structured environmental cues of self-management strategies, as well as improved social understanding through social cognitive training.

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Understanding Limited Use of Amplification in Infants and Children Who Are Hard of Hearing

Perspectives on Hearing and Hearing Disorders in Childhood ◽

10.1044/hhdc25.1.15 ◽

2015 ◽

Vol 25 (1) ◽

pp. 15-23 ◽

Cited By ~ 1

Author(s):

Ryan W. McCreery ◽

Elizabeth A. Walker ◽

Meredith Spratford

Keyword(s):

Hard Of Hearing ◽

Hearing Aid ◽

Management Strategies ◽

Infants And Children ◽

Future Research ◽

Research Needs ◽

Case Examples ◽

Hearing Aid Use ◽

Wide Range ◽

In Infants And Children

The effectiveness of amplification for infants and children can be mediated by how much the child uses the device. Existing research suggests that establishing hearing aid use can be challenging. A wide range of factors can influence hearing aid use in children, including the child's age, degree of hearing loss, and socioeconomic status. Audiological interventions, including using validated prescriptive approaches and verification, performing on-going training and orientation, and communicating with caregivers about hearing aid use can also increase hearing aid use by infants and children. Case examples are used to highlight the factors that influence hearing aid use. Potential management strategies and future research needs are also discussed.

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23: Renal Arterial Injuries: A Single Center Analysis of Management Strategies and Outcomes

The Journal of Urology ◽

10.1016/s0022-5347(18)30288-x ◽

2007 ◽

Vol 177 (4S) ◽

pp. 9-9

Author(s):

Ephrem O. Olweny ◽

Sean P. Elliott ◽

Thomas X. Minor ◽

Jack W. McAninch

Keyword(s):

Management Strategies ◽

Single Center ◽

Arterial Injuries

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160: Cost-Effectiveness of Medical Management Strategies of Nephrolithiasis in Different Health Care Systems

The Journal of Urology ◽

10.1016/s0022-5347(18)37422-6 ◽

2004 ◽

Vol 171 (4S) ◽

pp. 42-43 ◽

Cited By ~ 1

Author(s):

Yair Latan ◽

David M. Wilhelm ◽

David A. Duchene ◽

Margaret S. Pearle

Keyword(s):

Health Care ◽

Cost Effectiveness ◽

Medical Management ◽

Health Care Systems ◽

Management Strategies ◽

Care Systems

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Validating the Resource-Management Inventory (ReMI)

European Journal of Psychological Assessment ◽

10.1027/1015-5759/a000557 ◽

2020 ◽

Vol 36 (5) ◽

pp. 777-786 ◽

Cited By ~ 1

Author(s):

Julia Waldeyer ◽

Jens Fleischer ◽

Joachim Wirth ◽

Detlev Leutner

Keyword(s):

Higher Education ◽

Academic Achievement ◽

Resource Management ◽

Measurement Invariance ◽

Factor Structure ◽

Management Strategies ◽

Group Analysis ◽

Management Skills ◽

First Year Students ◽

Management Competency

Abstract. There is substantial evidence that students in higher education who have sophisticated resource-management skills are more successful in their studies. Nevertheless, research shows that students are often not adequately prepared to use resource-management strategies effectively. It is thus crucial to screen and identify students who are at risk of poor resource management (and consequently, reduced academic achievement) to provide them with appropriate support. For this purpose, we extend the validation of a situational-judgment-based instrument called Resource-Management Inventory (ReMI), which assesses resource-management competency (including knowledge of resource-management strategies and the self-reported ability to use this knowledge in learning situations). We evaluated the ReMI regarding factor structure, measurement invariance, and its impact on academic achievement in different study domains in a sample of German first-year students ( N = 380). The results confirm the five-factor structure that has been found in a previous study and indicate strong measurement invariance. Furthermore, taking cognitive covariates into account, the results confirm that the ReMI can predict students’ grades incrementally. Finally, a multi-group analysis shows that the findings can be generalized across different study domains. Overall, we provide evidence for a valid and efficient instrument for the assessment of resource-management competency in higher education.

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