Triad Approach Research Articles

A Triad Approach to Best Interests when Responding to Discharge Demands from Hospitalized Patients Lacking in Mental Capacity to Decide on Treatment

A Triad Approach to Best Interests when Responding to Discharge Demands from Hospitalized Patients Lacking in Mental Capacity to Decide on Treatment

Triad of rehabilitation, nutrition support, and oral management improves activities of daily living and muscle health in hospitalized patients after stroke

The triad approach combining rehabilitation, nutrition support, and oral management has garnered increasing interest for improving outcomes in older adults. However, evidence is limited regarding its effectiveness in post-stroke patients, who are at high risk for malnutrition, sarcopenia, oral problems, and dysphagia. This study aims to investigate the association between the triad approach and improvement in activities of daily living (ADL), muscle strength, and skeletal muscle mass in these patients. A retrospective cohort study was conducted using post-stroke patients. Patients were divided into groups based on their exposure to the triad approach, defined as a combination of intensive chair-stand exercise (rehabilitation), personalized food prescriptions (nutrition support), and oral management by dental professionals. We investigated the association between the triad approach and outcomes using multiple linear regression analysis adjusted for covariates. Primary outcome was Functional Independence Measure motor score (FIM-motor) at discharge and its gain. Secondary outcomes were handgrip strength (HGS) and skeletal muscle mass index (SMI) at discharge. The study included 1,012 post-stroke patients (median age 75.6 years; 54.1% men). Multiple linear regression analysis revealed that the triad approach had the strongest association with higher FIM-motor at discharge (β=0.262, p<0.001) and FIM-motor gain (β=0.272, p<0.001) compared to the individual or combined interventions. The triad also showed the strongest associations with higher HGS (β=0.090, p=0.017) and SMI (β=0.041, p=0.028) at discharge. The triad approach of intensive rehabilitation, personalized nutrition support, and oral management by dental professionals is strongly associated with improved ADL, muscle strength, and skeletal muscle mass in post-stroke rehabilitation patients. Implementing this multidisciplinary strategy may maximize functional and muscle health recovery.

Soil ecological risk assessment of ten industrial areas in China based on the TRIAD and VIKOR methods

The TRIAD approach is widely used as a scientific methodology available to deal with site-specific contamination scenarios. In this study, a soil environmental risk assessments (SERA) of ten industrial sites in China was conducted by ranking risks across multiple sites based on the TRIAD method, and attempted to provide an alternative method for risk ranking, the VIKOR method, when reference screening values for assessing individual indicators are unavailable. The VIKOR method was developed to address ranking and selection problems in multi-criteria decision-making, particularly in complex decision environments. The present assessments analyzed 33 chemical analysis indicators, 14 ecotoxicological indicators, and 5 ecological indicators related to soil microbial diversity, subsequently compared and discuss the differences in risk ranking results obtained using the two methods. The results of the TRIAD approach showed that six sites (including F, G, E, B, J and I) were ranked high in the risk order, which were in the moderate-risk range (Integrated risk value, 0.5–0.75). While the results of the VIKOR method showed that four sites (including F, G, H, and E) were ranked high in the risk order, followed by another four sites (including D, A, B, and C). Although there were differences in the assessment results, both methods consistently identified three sites (including F, G, and E) with relatively higher risks. The results indicated that when the TRIAD method is not applicable in special cases, the VIKOR comprehensive evaluation can be used to infer the relative ecological risk of the assessed site.

Bioactive Compounds in Citrus reticulata Peel Are Potential Candidates for Alleviating Physical Fatigue through a Triad Approach of Network Pharmacology, Molecular Docking, and Molecular Dynamics Modeling

Physical fatigue (peripheral fatigue), which affects a considerable portion of the world population, is a decline in the ability of muscle fibers to contract effectively due to alterations in the regulatory processes of muscle action potentials. However, it lacks an efficacious therapeutic intervention. The present study explored bioactive compounds and the mechanism of action of Citrus reticulata peel (CR-P) in treating physical fatigue by utilizing network pharmacology (NP), molecular docking, and simulation-based molecular dynamics (MD). The bioactive ingredients of CR-P and prospective targets of CR-P and physical fatigue were obtained from various databases. A PPI network was generated by the STRING database, while the key overlapping targets were analyzed for enrichment by adopting KEGG and GO. The binding affinities of bioactive ingredients to the hub targets were determined by molecular docking. The results were further validated by MD simulation. Five bioactive compounds were screened, and 56 key overlapping targets were identified for CR-P and physical fatigue, whereas the hub targets with a greater degree in the PPI network were AKT1, TP53, STAT3, MTOR, KRAS, HRAS, JAK2, IL6, EGFR, and ESR1. The findings of the enrichment analysis indicated significant enrichment of the targets in three key signaling pathways, namely PI3K-AKT, MAPK, and JAK-STAT. The molecular docking and MD simulation results revealed that the bioactive compounds of CR-P exhibit a stronger affinity for interacting with the hub targets. The present work suggests that bioactive compounds of CR-P, specifically Hesperetin and Sitosterol, may ameliorate physical fatigue via the PI3K-AKT signaling pathway by targeting AKT1, KRAS, and MTOR proteins.

The ConSoil project: An integrated framework for monitoring plant protection product residues in agricultural soil

AbstractPlant Protection Products (PPPs) are widely used to maintain high productivity and protect crops, but can have unintended toxic effects on beneficial non‐target soil organisms. To avoid unacceptable adverse effects of PPPs on soil organisms, a prospective risk assessment is carried out, which focuses on individual substances and their effects on a few individual species or groups. However, the reality of agricultural soils consists of complex networks of organisms exposed to mixtures of several PPP active substances. It is therefore essential to monitor PPP residues in soils. This paper describes the ConSoil project and its proposed framework for monitoring PPP residues in Swiss Agricultural soils which includes and integrates (1) risk‐based reference values for PPP residues in soil and (2) indicators of their effects on long‐term soil fertility. For risk‐based reference values, a proposal has been developed to derive Soil Guideline Values (SGVs) for PPP residues and a mixture risk assessment concept is being developed. Regarding indicators, a toolbox of ecological and ecotoxicological indicators will be proposed to reflect the protection goal of long‐term soil fertility in agricultural soils. For this objective, standardised and/or well‐established bioindicator methods will be selected for the key soil organisms that support soil fertility. To integrate SGVs and the biomonitoring toolbox, an adapted TRIAD approach is proposed, where generic SGVs are used as a screening tool to identify monitoring sites potentially at risk and to trigger more detailed monitoring. Detailed monitoring will refine the SGVs based on site‐specific characteristics and implement the bioindicator toolbox to measure the effects of PPP residues and their risk to long‐term soil fertility. As a novel integrated framework, it is essential to use the data generated in detailed assessments to calibrate and refine the SGVs and bioindicator tools and improve the monitoring over time.

Ecological risk assessment based on the TRIAD approach in an area contaminated by the metallurgical and mining industries

Ecological risk assessment based on the TRIAD approach in an area contaminated by the metallurgical and mining industries

Integrated assessment of the natural purification capacity of tidal flat for persistent toxic substances and heavy metals in contaminated sediments

Natural purification of pollutants is highly recognized as regulating ecosystem services; however, the purification capacity of tidal flats remains largely unknown and/or unquantified. A 60-day mesocosm transplant experiment was conducted in situ to assess the purification capacity of natural tidal flats. We adopted the advanced sediment quality triad approach, monitoring 10 endpoints, including chemical reduction, toxicity changes, and community recoveries. The results indicated that contaminated sediments rapidly recovered over time, particularly > 50% within a day, then slowly recovered up to ∼ 70% in a given period (60 days). A significant early reduction of parent pollutants was evidenced across all treatments, primarily due to active bacterial decomposition. Notably, the presence of benthic fauna and vegetated halophytes in the treatments significantly enhanced the purification of pollutants in both efficacy and efficiency. A forecast linear modeling further suggested additive effects of biota on the natural purification of tidal flats, reducing a full recovery time from 500 to 300 days. Overall, the triad approach with machine learning practices successfully demonstrated quantitative insight into the integrated assessment of natural purification.

Examining the impact of website layout and dark triad approach on real estate purchase decisions in India: a young adult socialization mediated model

Purpose This study aims to determine website quality, young adult socialization and dark triad personality as the factors influencing the real estate purchase decision. In addition, this study also measures the mediating effects of young adult socialization on real estate purchase buying behavior. Design/methodology/approach Related literature, quantifiable variables with a five-point Likert scale, hypothesis testing and mediators are used to study the model. A systematic questionnaire that was divided into four sections was used. A total of 336 valid responses were collected and analyzed through a structural equation model. Findings The results suggest that dark triad personality and young adult socialization considerably affect real estate purchase decisions. The development proves website quality does not significantly impact real estate purchase behavior. Research limitations/implications This study is limited to a few young consumers’ responses. Future studies could be more widespread globally and should include more variables and offline methods of purchasing behavior. Originality/value As per the review of existing literature, this research is the first, to the best of the authors’ knowledge, to determine the factors affecting the real estate purchase decision with factors like website quality, dark triad personalities and young adult socialization involving it.

Addressing Perinatal Substance Use: A Triad Approach Led by the Colorado Perinatal Care Quality Collaborative.

Unintentional overdose is a leading driver of maternal death in Colorado. The high volume of maternal deaths from preventable causes lends questions to failures in our clinical and community-based care for pregnant and postpartum people. The Colorado Maternal Mortality Review Committee identified 3 main contributors including stigma in the community and health care system, fragmentation of the health care system, and the need for more clinician training. The Colorado Perinatal Care Quality Collaborative led a 3-pronged intervention to address these challenges and improve perinatal care. The first intervention, the Colorado Alliance for Innovation on Maternal Health Substance Use Disorder quality improvement initiative, partnered with birthing hospitals statewide to institute universal screening and timely referral for individuals at risk of substance use disorder (SUD) and perinatal mood and anxiety disorders. The second intervention, the Improve Perinatal Access, Coordination, and Treatment for Behavioral Health initiative, established a perinatal support network within communities. This program assists individuals with SUD, perinatal mood and anxiety disorders, or social needs to navigate the perinatal period. The third intervention, the Colorado Maternal Overdose Matters Plus program, has enhanced in-hospital access to pharmacotherapy for pregnant and postpartum individuals with SUD through training and technical support. These collaborative initiatives aim to minimize barriers to care by integrating inpatient screening, treatment referrals, pharmacotherapy access, and community care support to mitigate maternal mortality in Colorado.

Enhancing multifunctionality in European boreal forests: The potential role of Triad landscape functional zoning

Land-use policies aim at enhancing the sustainable use of natural resources. The Triad approach has been suggested to balance the social, ecological, and economic demands of forested landscapes. The core idea is to enhance multifunctionality at the landscape level by allocating landscape zones with specific management priorities, i.e., production (intensive management), multiple use (extensive management), and conservation (forest reserves). We tested the efficiency of the Triad approach and identified the respective proportion of above-mentioned zones needed to enhance multifunctionality in Finnish forest landscapes. Through a simulation and optimization framework, we explored a range of scenarios of the three zones and evaluated how changing their relative proportion (each ranging from 0 to 100%) impacted landscape multifunctionality, measured by various biodiversity and ecosystem service indicators. The results show that maximizing multifunctionality required around 20% forest area managed intensively, 50% extensively, and 30% allocated to forest reserves. In our case studies, such landscape zoning represented a good compromise between the studied multifunctionality components and maintained 61% of the maximum achievable net present value (i.e., total timber economic value). Allocating specific proportion of the landscape to a management zone had distinctive effects on the optimized economic or multifunctionality values. Net present value was only moderately impacted by shifting from intensive to extensive management, while multifunctionality benefited from less intensive and more diverse management regimes. This is the first study to apply Triad in a European boreal forest landscape, highlighting the usefulness of this approach. Our results show the potential of the Triad approach in promoting forest multifunctionality, as well as a strong trade-off between net present value and multifunctionality. We conclude that simply applying the Triad approach does not implicitly contribute to an overall increase in forest multifunctionality, as careful forest management planning still requires clear landscape objectives.

TRIAD method to assess ecological risks of contaminated soils in abandoned mine sites

Site-specific soil ecological risk assessment is important for protecting soil ecosystems because it reflects the environmental factors at the site to detect ecological risks and develop risk management measures. This study assessed the ecological risks from chemical pollutants in abandoned mine sites using the TRIAD approach, evaluating its overall applicability, including the tiered system of assessment. A site-specific soil ecological risk assessment was conducted for five abandoned mine sites (Sites 1–4 and R, the reference site); integrated risks (IRs) for each site were calculated. Our results of the Tier 2 assessment showed that IRs at Sites 1–4 were 0.701, 0.758, 0.840, and 0.429, respectively. The IR classification was moderate, high, high, and low risk, in that order for Sites 1–4, the same as that for Tier 1. The IR had more varied analyses, emphasizing the significance of conducting higher tiered analyses under TRIAD while maintaining a balance between soil ecosystem protection and socioeconomic costs. Multiple analyses reduced the uncertainty of IR, thus enabling efficient risk management decision-making to protect soil ecosystems. Our study provides a basis for using the TRIAD for soil assessment and establishing policies for site-specific soil ecological risk assessments.

ЭКОЛОГИЧЕСКАЯ ОЦЕНКА СОСТОЯНИЯ ПОЧВ МЕТОДАМИ БИОИНДИКАЦИИ

Biotesting of soils in various districts of Bishkek was carried out. The sections of the western, eastern and southern parts of the city, characterized by different traffic congestion, were surveyed. Test cultures of freshwater crustaceans Daphnia magna and ciliates Paramecium caudatum were used to determine soil toxicity. Cultivation water was taken for control. The experiments were carried out in triplicate. The cultures were placed in a climatostat for 120 hours. The survival rate and sensitivity of test cultures were determined. Mathematical integral calculation methods were used to determine the degree of toxicity in the soil. Survival of bioindicator organisms varies from less toxic to acutely toxic to test systems. The cleanest area is the territory of the southern part of the city, in which there is a park area. The methods of bioindication of the state of soils used in this study make it possible to obtain preliminary reliable information on the state of soil ecosystems and are one of the aspects of the Triad approach in assessing environmental pollution.

Adapting Innovation Development Management Processes to Improve Energy Efficiency and Achieve Decarbonization Goals

The study focuses on problems of decarbonization as a systemic priority for innovative changes in the national economy in times of new global challenges. The research hypothesis confirms dual effects within the triad of innovation – energy efficiency – decarbonization, when every item is affected by two others. We used econometric models to test them on the data from 83 Russian regions from 2016 to 2020. The revealed effects are critical for developing a conceptual framework for adjusting managerial goals to focus on energy efficiency and decarbonization in Russian economy. The paper contains suggestions for Russian regions for incorporating the triad approach in their plans for energy efficiency and decarbonization. This paper adds value to understanding of relationships within the triad. It also has practical value for practitioners aiming at improving the sustainability of national economies. Importantly, our findings could be used by countries of different levels of economic development and with different combinations of energy sources in achieving goals in decarbonization or carbon neutrality for their economies.

An alternative risk assessment framework for tropical soil multi-metal contamination using arbuscular mycorrhizal fungi

Arbuscular mycorrhizal fungi (AMF) are a key group of soil organisms involved in several ecosystem services, but they had not been explored in retrospective ecological risk assessment (ERA) schemes, partially due to a lack of experimental protocols. We aimed to perform a site-specific test to assess the effects of multiple metal contaminated soil (Zn, Cu, Cd, and Pb) on several ecotypes of AMF and evaluate the conceptual fitness of the performed AMF test to include in the TRIAD approach of ERA schemes. The results demonstrated that increasing metal contaminated soil proportions that inhibited 50 % (IC50) of spore germination varied from 28 to >80. Ecotypes such as Claroideoglomus etunicatum (IC50 > 80) and Racocetra gregaria (IC50 > 80) experienced 50 % reduction in spore germination at metals concentrations of 10,776.3 for Zn, 1015.2 Cu, 65.5 Cd, 140.2 mg dm−3 Pb, that are 3 times higher than those for Acaulospora mellea CMM101 (IC50 28 [16.2–39.8]) (3441.7 Zn, 333.9 Cu, 17.8 Cd, 56.5 mg dm−3 Pb). In the evaluation of the suitability of the AMF ecotoxicological test to ERA, both spore germination and germinative tube growth were best evaluated and thus suitable in the following descending order: Tier III, Tier II, and Tier I. Variable effects of multiple-metal contamination on the ecotypes indicates how AMF community is affected in its pre-symbiotic structures. The ecotoxicological test allowed the selection of two species with the greatest sensitivity (Ambispora appendicula and Rhizophagus clarus CMM103) to the metal matrix, with the potential to best fit ERA objectives. The site-specific ecotoxicological test with AMF ex-situ proved adequate as an alternative test for Tiers II and III of TRIAD ERA schemes for metal contaminated areas. Data generated through test results, such as the inhibition concentrations (ICs), could be incorporated into ERAs risk indexes, increasing its ecological relevance, and reducing overall uncertainties.

Toxicity of sediments in eight urban stormwater management ponds: bioassessment by oligochaete community metrics used in the sediment quality triad.

Implemented for decades as part of the 'best management practices (BMPs)' for controlling urban runoff impacts on receiving waters, stormwater management ponds (SMPs) have been increasingly viewed as potential habitats for urban wildlife. However, since SMPs are subject to a lot of environmental constraints, research toward assessing their ecological quality and their actual benefits as habitats for biota is needed. In this study, the sediment toxicity of eight SMPs located in Southern Ontario, Canada was assessed using the sediment quality triad (SQT) approach. Sediment samples were collected for chemical, ecotoxicological and biological analyses. An oligochaete-based index approach (Oligochaete Index of Lake Bioindication and percentage of pollution-sensitive species) was used as the biological endpoint and integrated into a weight-of-evidence approach to assessing the general sediment quality of the ponds. Our results showed that (i) heavy metals in the sediment and (ii) chloride concentrations in the sediment interstitial water caused detrimental effects on the ecological quality of the sediments in the ponds studied. The oligochaete indices applied in this study showed value as biological endpoints to be integrated into the SQT and used for setting up sediment ecological quality goals.

Impact of Autonomous Learning for Advanced Acquisition of Physiology (ALAAP) module among undergraduate health-care professional students

Objectives: The present study aims to document the effectiveness of self-directed activity-based Autonomous Learning for Advanced Acquisition of Physiology (ALAAP) module for endocrine learning among undergraduate physical therapy students. Materials and Methods: Fifty-five second semester students (28 males and 27 females) of the physical therapy course of a private healthcare university were recruited and the traditional didactic method of teaching-learning was compared with that of the newly developed ALAAP module. Results: The triad approach employed to compare the scores of pre-test and post-test after the ALAAP module intervention showed P &lt; 0.001 and Hedges’ g effect size of 0.75 with a 95% CI of –3.41 to –1.5 implying the effectiveness of the module to be strong. Furthermore, the feedback obtained was favourable toward this module and showed that there was an increase in both the affective and cognitive domains of learning. Conclusion: ALAAP module for endocrine physiology is effective and positively targeted all types of learners. It helped their transition from pedagogy to andragogy type of deep learning. The group work done by the students as a part of this module instilled collaborative and cooperative learning in them.

State of the Art of Triad-Based Ecological Risk Assessment: Current Limitations and Needed Implementations in the Case of Soil Diffuse Contamination

Soils can be sinks of pollutant mixtures, whose effects on terrestrial ecosystems are not of obvious interpretation. Risk assessment is rather codified and many approaches can be used. Nevertheless, there are still uncertainties remaining when dealing with diffuse pollution, including chronic inputs of low, sublethal, concentrations of mixtures of micropollutants. In this paper, we reviewed through a comprehensive literature analysis one of the latest promising methodologies, the triad approach, in order to understand its area of application in terrestrial ecosystems, the ways of applicability and the reported actual usage. In the case of diffuse pollution, where all the criteria of the triad approach can differ in their indication, we show that some improvements have to be made in either the chemical, ecological or ecotoxicological approaches to be able to clearly identify the risk and to address the uncertainties linked to the low, sublethal contents of contaminants.

Site-specific ecological risk assessment of metal-contaminated soils based on the TRIAD approach

Ecological risk assessment based on scientific data is crucial for understanding causal relationships between chemical pollution and environmental risks. Simultaneously, a balance is required between socioeconomic factors and scientific evidence. The TRIAD approach, which incorporates three lines of evidence (LoE)—chemical (Chem-LoE), ecotoxicological (Ecotox-LoE), and ecological (Eco-LoE)—was applied in five sites of an abandoned mine for site-specific soil ecological risk assessment (SERA). In combination, the three LoEs showed that two sites had extremely high risks, one site had moderate risk, and the other site had low risk. At all sites, Chem-LoE exhibited high-integrated risk values. In Ecotox-LoE and Eco-LoE, some species were not affected despite high metal concentrations in the soil samples collected from the sites, indicating that the bioavailability of metals differed according to the physiochemical properties of the soil medium. This study is significant as multiple analyses were performed considering ecosystem structure to reduce uncertainty in SERA. The results provide information to support effective decision-making risk management to protect the soil ecosystem. Moreover, these findings will be useful in establishing policies and priorities for soil risk management.

An exploration of general practitioners’ and pharmacists’ views and experiences of integrating a pharmacist into general practice: a qualitative study

Abstract Introduction Practice-based pharmacists (PBPs) have been introduced into general practice across the United Kingdom (UK) to relieve some of the pressures within primary care (1,2). However, there is little existing UK literature that has explored healthcare professionals’ (HCPs’) views about PBP integration and how this role has evolved. Aim To explore the views and experiences of general practitioners (GPs), PBPs, and community pharmacists (CPs) about PBPs’ integration into general practice and their impact on primary healthcare delivery. Methods Purposive and snowball sampling were used to recruit triads (a GP, a PBP, and a CP) from across five administrative healthcare areas in one region in the UK to participate in one-to-one semi-structured interviews. Sampling of practices to recruit GPs and PBPs commenced in August 2020. These HCPs identified the CPs who had most contact with the general practices in which the recruited GPs and PBPs were working. The interview topic guides were developed based on the published literature, and through discussion within the research team; they were piloted with two GPs, two PBPs, and two pharmacists. Due to the Covid-19 pandemic, interviews were conducted via telephone or Microsoft Teams platform. All interviews were recorded, transcribed verbatim, and analysed using inductive thematic analysis. Results Eleven triads were recruited from across the five administrative areas. Analysis of interview transcripts is ongoing. Findings to date have revealed four main themes in relation to PBPs’ integration into general practices (Table): evolution of the role, PBP attributes, collaboration and communication, and impact on care. A number of areas for development were identified such as patient awareness of the role and communication pathways between PBPs and CPs. Many saw PBPs as a ‘central hub-middleman’ between general practice and community pharmacies and between primary and secondary care. Conclusion Participants reported that PBPs had integrated well, and perceived a positive impact on primary health care delivery. Although recruitment was limited to one UK geographical region, the triad approach provided a more comprehensive overview of the working relationships between the three HCP groups. Further work is needed to increase patient awareness of the PBP role. References (1) Strategic Leadership Group for Pharmacy. Practice-based pharmacists’ statement. 2016. (Online) Available at: https://www.health-ni.gov.uk/sites/default/files/publications/health/practice-based-pharmacists.pdf (accessed 06 Oct 2021). (2) NHS England. Clinical pharmacists in general practice. 2015. (Online) Available at: https://www.england.nhs.uk/gp/gpfv/workforce/building-the-general-practice-workforce/cp-gp/ (accessed 06 Oct 2021).

The association between police officers in schools and students’ longer term perceptions of police as procedurally just

AbstractResearch SummaryMuch debate exists regarding the use of police inside schools and their impacts on students. Some argue that the use of School Resource Officers (SROs) could foster positive perceptions of police. However, no research exists examining whether SROs affect perceptions of police later in life. Further, research has not evaluated how differing SRO roles impacts lasting perceptions of police. Using a regression analysis on a sample of 328 college students, this study investigated whether there is a relationship between SRO presence during the middle‐ or high‐school years and current perceptions of local law enforcement in terms of procedural justice (neutrality, voice, trust, respect). Additionally, we compared the impacts of various SRO roles including an enforcement only approach, a mixed approach (i.e., law enforcement and an additional activity such as teaching) and a full triad approach (i.e., law enforcement, teaching, and mentoring) on these perceptions. The results reveal differential impacts on perceptions depending on whether the SRO was used in middle versus high school as well as the role typology of the SRO. Though small, there were mostly negative relationships between SRO presence in middle school and lasting perceptions of procedural justice for local police, though the use of a full triad model mitigates this negative effect. In contrast, SRO usage in high school has small yet positive effects on longer term perceptions of police, but only when performing a mixed or full triad approach.Policy ImplicationsPolicy makers and school administrators should reconsider the use of SROs in middle schools as the exposure to these officers early on is associated with more negative lasting impressions of police. However, the use of SROs in high schools can be beneficial for fostering long‐term perceptions of police so long as these officers are engaged in activities beyond pure law enforcement.