Level Of Deterioration Research Articles

Hospital overcrowding and care of stroke patients: Irish national audit of stroke

IntroductionHospital overcrowding where patient admissions exceed capacity is associated with worse outcomes in Emergency Department. Developments in emergency stroke care have been associated with improvements in stroke outcome but are dependent on effective, organised care. We examined if overcrowding in the hospital system was associated with negative changes in stroke outcome.MethodsData on overcrowding were obtained from the Irish Nurses and Midwives Organisation (INMO) ‘Trolley Count’ database recording the number of patients cared for on trolleys/chairs in all acute hospitals each midnight. These were compared with quarterly data from the Irish National Audit of Stroke from 2013 to 2021 inclusive. Variables analysed were inpatient mortality rate, thrombolysis rate for ischaemic stroke, median door to needle time and median length of stay.Results579449 patient episodes were recorded by Trolley Watch over the period, (Quarterly Median 16719.5, range 3389–27015). Average Quarterly Thrombolysis rate was 11.3% (sd 1.3%) Median Quarterly Inpatient Mortality rate was 11.8% (Range 8.9-14.0%). Median Quarterly Length of stay was 9 days (8–11 days). Median quarterly door to needle was 65 min (45–80 min). Q1 was typically the worst for overcrowding with on average 19777 incidences (sd 4786). This was significantly higher than for Q2 (mean 13540 (sd 4785) p = 0.005 t-test) and for Q3 (mean 14542 (sd 4753) p = 0.03). No significant correlation was found between quarterly Trolley watch episodes and inpatient mortality (r = 0.084, p = 0.63), median length of stay r=-0.15, p = 0.37) or thrombolysis rate (r = 0.089 p = 0.61). There was an unexpected significant negative correlation between trolley watch data and median door to needle time (r=-0.36, p = 0.03).ConclusionDespite increasing hospital overcrowding, stroke services still managed to preserve standard of care. We could find no association between levels of overcrowding and deterioration in selected indices of patient care.

Treatability of odorous dioxanes/dioxolanes in source water: How does molecular flexibility and pre-oxidation affect odorant adsorption

Odorous dioxanes and dioxolanes, a class of cyclic acetals often produced as byproducts in polyester resin manufacturing, are problematic in drinking water treatment due to their low odor thresholds and resistance to conventional treatment technology. Our research focuses on the removal of ten dioxane/dioxolane compounds through oxidation and adsorption processes, exploring the key molecular properties that govern the treatmentability. We discovered that both chlorination and permanganate oxidation were largely ineffective at degrading cyclic acetals, achieving less than 20% removal even at high applicable doses. Conversely, powdered activated carbon (PAC) adsorption proved to be a more effective method, with a removal of > 90% at a PAC dosage of 10 mg/L for seven out of ten compounds. The presence of natural organic matter (NOM) reduced PAC adsorbability for all odorants, but the deterioration level substantially varied and mostly affected by structural flexibility as indicated by the number of rotatable bonds. The results of both the experimental investigation and molecular simulation corroborated the hypothesis that more rotatable bonds (from one to three here) are indicative of greater structural flexibility, which in consequence determines the susceptibility of cyclic acetals to NOM competitive adsorption. Increased structural flexibility could facilitate greater entry into silt-like micropores or achieve preferential adsorption sites with more compatible morphology against NOM competition. When pre-oxidation (chlorination and permanganate oxidation) and adsorption were applied sequentially, additional low molecular weight NOM components produced by pre-oxidation resulted in intensified NOM competition and decreased odorant adsorbability. If this combination is inevitably required for algae and odorant control, it would be beneficial to utilize a wise screen for oxidants and a reduced oxidant dose (less than 2 mg/L) to mitigate the deterioration of odorant adsorption. This study elucidates the roles of structural flexibility in influencing the treatability of dioxanes and dioxolanes, extending beyond the solely well-established effects of hydrophobicity. It also presents rational practice guidelines for the combination of pre-oxidation and adsorption in addressing odor incidents associated with dioxane and dioxolane compounds.

University Students’ Problematic Mobile Phone Use

The study aimed to examine the factors affecting the problematic mobile phone use of university students (n=2.110). The study was conducted at a university in Turkey between April and May 2018. The students were found to have an above-average level of mobile phone addiction, an average level of deterioration in social relations, having problems as a result of using a mobile phone below the average, and using problematic mobile phones. The scale scores of girls were higher. It was determined that as the education level of the parents increased, the addiction scores of the students increased. Being aware of the problematic status of university students' mobile phone usage can help raise awareness about the issue and take necessary precautions.

Fabrication and characterization of natural fiber reinforced cowpea resin-based green composites: an approach towards agro-waste valorization.

A paradigm shift towards using bio-resins or bio-derived resins among materials scientists has led to wide exploration of the sector. Polymers such as soy protein isolate, poly(hydroxy alkanoate), poly(lactic acid), and thermoplastic starch are all synthetically modified bio-based resins and are costly. The cowpea-derived resin with the least chemical modification was used in this study as a matrix for the formation of composites with natural fibers at a lesser cost. Fabrication of composites of vetiver and jute with varying weight percentages of fiber (50, 60, and 70%) in the innovative cowpea resin resulted in favorable mechanical properties and degradability. The tensile strength was the highest for the jute-cowpea composite (JCP2) at around 37.49 MPa, which also has a flexural strength of 40.3 MPa. Dynamic mechanical analysis of composites reflects the moderate storage moduli of 1802 MPa for JCP2 and 1351 MPa for vetiver-cowpea (VRCP2) composites. Impact strength studies and thermal stability also show optimistic results. The contact angle, water absorption behavior, and swelling in thickness show the moderate hydrophobicity of the composites. This is also a reason for the improved degradability of the composites in soil-burial and microbial environments. Characterizations such as FE-SEM and FTIR spectroscopy, conducted after the degradation of the samples, showcased the level of deterioration. All these results suggest using the innovative cowpea resin as a good alternative to various other synthetic thermoplastic resins used in the fiber reinforced composite manufacturing field.

Graphic Paper: Empowering refugee families in transit: the development of a culturally competent and compassionate training and support package.

Refugee parents who fled conflicts suffered violence and traumas and face huge challenges in supporting the health and welfare of their children while in transit. To describe the development of a culturally competent and compassionate training and support package (TSP) for nurses, social and healthcare workers and volunteers, with a focus on parenting needs among unsettled refugees fleeing conflict. The multi-method approach included: a scoping review covering parenting needs of refugees fleeing conflict zones; collection of stories from refugee parents, healthcare workers and volunteers via a mobile application; discussions between team members; a piloted and evaluated curriculum. High levels of family distress and deterioration of parental identity were identified. Informed by these results, the curriculum is articulated along 20 bite-sized learning units, covering four age stages of childhood as well as targeting adults' well-being. Pilot training was evaluated positively, confirming feasibility and usefulness of the TSP. Unsettled refugee parents fleeing conflicts face psycho-social and practical difficulties negatively affecting their parenting skills. The care workforce should be trained in order to provide culturally competent and compassionate support to help these families. Open access digital platforms are promising as autodidactic and self-help tools among hard-to-reach populations.

Optimal profit in two-level trade credit eoq model with default risk and reminder cost under finite time horizon having time-dependent demand and deterioration

Trade credit is a type of promotional activity that generally increases demand and revenue but also invites default risk due to dishonest customers. Due to default risk, revenue is lost, and to overcome this, an arrangement is made to remind the defaulters. A retailer dealing with a perishable item wants to exhaust the stock quickly after a certain deterioration level. Demand and deterioration of the products are normally dynamic. The business period of seasonal products is uncertain. Considering these facts, we formulate and analyze a two-level trade credit inventory model, where the wholesaler and retailer give credit periods to their corresponding downstream customers. After a certain level of deterioration, the retailer increases the credit period for the customers for early stock exhaustion, and to reduce default risk, a reminder cost is introduced. These activities increase the profit. The mathematical models under different circumstances are formulated for different time horizons. Some existing results are deduced. The models are numerically solved using a parametric study and the Generalised Reduced Gradient method through LINGO 19.0 software. Some lemmas and theorems are deduced to establish the analytical outcomes. Trade-offs between the number of the business cycle, trade credit, and reminder cost against optimum profit are separately demonstrated. The results with and without reminder cost are compared, and it is shown that the model with reminder cost fetches more profit. Profit under different uncertain environments are evaluated, and they differ marginally. Some beneficial impacts are discussed.

Determination of Continuous Deterioration Level due to Changing Demand Rates in Inventory

Determination of Continuous Deterioration Level due to Changing Demand Rates in Inventory

Seismic collapse fragility analysis of steel moment-resisting frames (MRFs) with stiffness and strength deterioration considering the spectral shape of ground motion records

In this paper, the seismic collapse fragility analysis of special steel moment-resisting frame (MRF) buildings with strength and stiffness deterioration is comprehensively evaluated, taking into account the effect of record selection based on the spectral shape parameters. For this purpose, three special steel moment-resisting frame buildings, including 3, 10, and 20-story structures as representatives of low-rise, mid-rise, and high-rise buildings, are investigated. The modified bilinear Ibarra-Medina-Krawinkler (IMK) relation is used for modeling the concentrated plasticity and considering cyclic degradation in beams and columns under earthquake effects in Incremental Dynamic Analysis (IDA). The ground motion records are selected and categorized based on the three parameters, including the epsilon, SaRatio, and Np from a large database consisting of 2000 earthquake records. The records are divided into 7 groups using the epsilon parameter. The SaRatio and Np parameters further divide the records into 5 categories. Additionally, a randomly selected set of 200 earthquake records is used. The effects of hysteretic deterioration and spectral shape parameters of earthquake records on the median IDA curves, collapse fragility curves, and collapse capacity of the steel MRF structures are investigated. In addition to the hysteretic deterioration of steel structural members based on the results of the previous experiments, different values of the deterioration parameter (λ) are used in the nonlinear time history analyses to parametrically study the effect of deterioration on the collapse capacity. Finally, the effect of various parameters on the seismic collapse capacity of the structures in the form of Tornado diagrams is illustrated. The results demonstrate that the randomly selected records yield results close to the records sets with Np = 1, SaRatio = 1, and ε = 0. Furthermore, for a constant deterioration level, increasing epsilon and SaRatio, and decreasing Np lead to an increase in the collapse capacity of the structures. The results also show that the effect of deterioration on the collapse capacity of the buildings, especially the low-rise 3-story building, is significant.

Analysis of capacitive discharges in motor bearings under different operation conditions

AbstractDespite being a well‐known problem, bearing faults are still one of the major challenges that the industry face. The growing use of voltage source inverters imposed the alertness of possible bearing damage due to their high‐frequency signals. The aim of this paper is to investigate the effect of capacitive discharges on a rolling element bearing to obtain a series of faulty bearings with different deterioration levels. An ageing test bench is built to generate bearing roughness using Electric Discharge Machining. The purpose is to study the effect of operation conditions, such as frequency of drive, amplitude of shaft voltage, radial load level as well as rotational speed, on the capacitive discharge occurrence within the bearing. Having the desire to further understand this phenomenon, the influence of each parameter on the discharge activity and the discharge waveform is analysed. A worst‐case scenario is conducted and applied to a series of bearings. Finally, the bearing damage is examined, and a quantitative fault detection method is presented based on a microscopic inspection of the bearing's surface.

An Engine Deterioration Model for Predicting Fuel Consumption Impact in a Regional Aircraft

A deterioration cycle model is presented, designed to consider the turbomachinery efficiency losses that are expected during real engine in-service operations. The cycle model was developed using information from practical experience found in the literature to account for both short- and long-term deterioration effects; the former occurring during the first flight cycles, the latter due to regular in-service operation. This paper highlights the importance of analyzing the inter-turbine temperature margin (ITTM) to track engine deterioration to determine the extent of an in-service engine life. The proposed model was used to assess the ITTM and fuel consumption impact in the CRJ-700 regional aircraft (powered by two CF34-8C5B1 engines) for three representative missions: short (0.4 h), average (1.4 h), and long (2.5 h), considering different levels of engine deterioration, from the new engine level up to fully deteriorated. The fuel consumption at the new engine level (zero deterioration) was validated against a real-time engine model embedded in a Level-D flight simulator, the so-called Virtual Research Flight Simulator located at the Laboratory of Applied Research in Active Control, Avionics, and AeroServoElasticity. The errors found in this validation for the trip mission fuel consumption in the short, average, and long missions were −3.6, +0.9, and +0.6%, respectively. The cycle model predictions suggest the ITTM for a new engine is 55.2 °C, whereas for a fully deteriorated engine, it is 26.4 °C. Finally, in terms of fuel consumption, the results presented here show that an average CF34-8C5B1 engine shows an increase in the cumulative fuel consumption of 2.25% during its life in service, which translates to a 4.5% impact in aircraft fuel consumption.

Service Life Design of Reinforced Concrete Maritime Infrastructure: Holistic Approach with Experiences from Chilean Cases

The consideration of the useful life of reinforced concrete in the different stages of a structure's life cycle, as a distinguishing factor in the design process for performance under aggressive environmental conditions, has presented new challenges in construction. This includes the development of new regulations incorporating innovative engineering materials, performance tests and modeling processes to estimate concrete deterioration over time, and construction processes ensuring adequate Quality Control and Quality Assurance (QAQC). As a result, infrastructure projects have been able to exceed their intended lifespan, maintaining serviceability levels for more than 100 years. One such example is the Chacao Bridge project currently under construction in southern Chile. This paper provides an overview of project stages from a holistic approach, focusing on aspects inherent to planning including design and construction processes, control stages for monitoring deterioration levels through regular diagnostics and appropriate monitoring to support ongoing structural health management. Additionally, it presents real case design examples carried out with specific models created for each case.

Correction of Nitrosative Stress During Reparative Regeneration of the Nasal Cavity Mucosa in an Experimental

Introduction. Nitric oxide metabolites play an important role in prolongation of the inflammatory reaction, disorders of epithelial regeneration in diseases of the upper respiratory tract. One of the promising approaches to regulating the bioactivity of nitric oxide is the use of antioxidants.The objective of the study is to evaluate the effectiveness of antioxidant therapy for the correction of nitrosative stress during reparative regeneration of the nasal mucosa in an experiment.Methods. A preclinical randomized experimental study is conducted on 160 rats, divided into 4 groups. The control group (n = 40) consists of intact animals. Animals in experimental group 1 (n = 40) do not receive treatment aſter injury; in group 2 (n = 40) anti-inflammatory treatment is prescribed. The third group consists of laboratory rats (n = 40), which are additionally injected into the nasal cavity with an antioxidant — a 15 % solution of 1,1-dimethyl-3-oxobutylphosphonic acid dimethyl ester. On days 2, 5, 10, and 14 of observation, the concentration of nitrates and nitrites and C-reactive protein in the blood of animals are determined.Results. In group 3, aſter an increase in the level of nitric oxide metabolites on day 2 aſter injury on day 5, a significant (p < 0.05) decrease was noted in comparison with other groups, and by day 10— normalization of the indicator. An increase in the level of C-reactive protein in blood serum correlated with the concentration of nitric oxide metabolites.Discussion. The optimal therapeutic effect when taking antioxidants develops when administered in the first hours aſter injury to reduce the excessive formation of reactive nitrogen radicals. However, the duration of administration should not exceed 4–5 days to avoid a significant decrease in the level of nitric oxide metabolites and deterioration of mucosal regeneration.Conclusions. Assessment of nitric oxide metabolitesin the blood at different times aſter injury is an important marker of inflammatory activity. The use of antioxidants helps to reduce the concentration of active nitrogen radicals.

A smoothing gradient thermo-mechanical damage model for thermal shock crack propagation: Theory and FE implementation

This paper introduces a novel smoothing gradient-enhanced thermo-mechanical damage model to capture complex thermal crack patterns. To describe the adiabatic property of the damaged region, the scalar variable indicating the deterioration level of material, the damage variable, is employed for the heat conduction balance equation. In essence, the local heat flux and heat capacity are modified to present a decrease in heat flow. Formulations for steady state and transient heat transfer are given. The accuracy and efficiency of the coupled smoothing gradient damage model are illustrated through the numerical experiments for steady state and transient crack growth (e.g., quenching test), where the predicted crack patterns induced by thermo-mechanical loading are in good agreement with experimental data and other reference numerical solutions.

Incidence of environmental factors on travertine façade of heritage buildings in the historic center of Cuenca-Ecuador. A test scenario through Digital Imagen Processing

The problem of architectural heritage conservation in a consolidated historic urban context is of worldwide relevance. In Ecuador, and specifically in Cuenca, there are no specific approaches to evaluate the environmental impact on the heritage deterioration, therefore, an alternative diagnostic of travertine facades is proposed to define the levels of deterioration based on climatic factors through a case study. Two research stages are developed; 1) preliminary diagnosis of the architectural, environmental and anthropic components, using architectural cards and Leopold’s Multivariable Matrix; and 2) quasi-experimental analysis with a mixed approach (quantitative and qualitative) based on real-time data collection of potential environmental variables to generate deterioration, which focuses on image processing. This technique is gaining momentum because it offers the possibility of studying the characteristics of surfaces through a non-invasive procedure. This paper describes the application of the Normalized Difference Vegetation Index (NVDI) algorithm applied to RGB images known as False-NVDI in order to obtain the deterioration caused by the incidence of environmental factors on the travertine facades. In particular, images of two buildings belonging to the Historic Center of the City of Cuenca were used. The results indicate that this technique has a great potential to determine three levels of deterioration; good, fair and bad. At the same time, it is confirmed that the proposed methodology is an effective and low-cost tool with high potential for short-term application in previous studies and more extensive research prior to intervention.

Impact of industrial hotspots on Tamla nala and Nunia nala confluence - a tributary of the Damodar river.

Clean water is essential for drinking, household use, and agriculture. Researchers studied 39 sites near Tamla nala and Nunia nala channels in Durgapur and Asansol City (West Bengal) to assess the deterioration level of water due to industrial discharge. During the first phase out of three, the researchers conducted a spatial representation of various physicochemical parameters, such as temperature, pH, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Total Hardness (TH), Electrical Conductivity (EC), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), significant anions such as chloride (Cl-), nitrate (NO3-), phosphate (PO4-3), sulfate (SO42-), cyanide (CN-1) and fluoride (F-), as well as heavy metals/metalloids such as lead (Pb), cadmium (Cd), chromium (Cr), iron (Fe), copper (Cu), nickel (Ni), mercury (Hg) and arsenic (As). As observed the parameters at various sites along the stream exceeded threshold limits majorly due to industrial discharge: highest pH, TDS, TH, EC, Cl-, SO42- at site 26; Fe at site 1, TSS, COD, CN- at site 33, 31, 2 respectively; Cd, Ni, Cu at site 19; Hg and Pb at site 3 and As at site 20. Contaminated areas were marked in red and secure areas in green. Additionally, the HMPI (Heavy metal pollution index) was estimated for eight locations to understand the impact of heavy metal pollution in the second phase of the study. An extremely high HMPI indicates heightened toxicity and health risks for both residents and outsiders. The Canadian Water Quality Index (1.0) was calculated for eight sites in the third phase based on seventeen parameters. The resulting WQI value was below 44, indicating poor water quality at the sites. Due to the poor quality and critical heavy metal toxicity, the authors recommended continuous monitoring, strict regulation enforcement, increased treatment capacity, Zero Liquid Discharge implementation, and raising awareness among residents.

Evaluating treatment efficacy in hospitalized COVID-19 patients, with applications to Adaptive COVID-19 Treatment Trials.

The current endpoints for therapeutic trials of hospitalized COVID-19 patients capture only part of the clinical course of a patient and have limited statistical power and robustness. We specify proportional odds models for repeated measures of clinical status, with a common odds ratio of lower severity over time. We also specify the proportional hazards model for time to each level of improvement or deterioration of clinical status, with a common hazard ratio for overall treatment benefit. We apply these methods to Adaptive COVID-19 Treatment Trials. For remdesivir versus placebo, the common odds ratio was 1.48 (95% confidence interval (CI) = 1.23-1.79; p < 0.001), and the common hazard ratio was 1.27 (95% CI = 1.09-1.47; p = 0.002). For baricitinib plus remdesivir versus remdesivir alone, the common odds ratio was 1.32 (95% CI = 1.10-1.57; p = 0.002), and the common hazard ratio was 1.30 (95% CI = 1.13-1.49; p < 0.001). For interferon beta-1a plus remdesivir versus remdesivir alone, the common odds ratio was 0.95 (95% CI = 0.79-1.14; p = 0.56), and the common hazard ratio was 0.98 (95% CI = 0.85-1.12; p = 0.74). The proposed methods comprehensively characterize the treatment effects on the entire clinical course of a hospitalized COVID-19 patient.

The manufacturing process provides green teas with differentiated nonvolatile profiles and influences the deterioration of flavor during storage at room temperature

Hundreds of green tea products are available on the tea market and exhibit different characteristics. In the present study, seven types of green tea were processed, and their nonvolatile profiles were analyzed by liquid chromatography–mass spectrometry. Non-spreading green tea contained higher concentrations of catechins and flavonoid glycosides, but lower concentrations of amino acids, caffeine, and theaflavins. Non-rolling green teas with a straight appearance contained higher concentrations of flavonoid glycosides and theaflavins. In contrast, leaf-rolling green teas contained much lower concentrations of flavonoid glycosides and catechins. These seven green tea qualities all decreased following prolonged storage, concurrent with increasing concentrations of proanthocyanidins, catechins dimers, theaflavins, and organic acids. The leaf-rolling green teas exhibited reduced levels of deterioration during storage in terms of their nonvolatile profile and sensory quality. Findings show that moderate destruction on tea leaves during green tea processing is beneficial to both tea flavor and quality maintenance during storage.

Demand Deposit Contracts and Probability of Bank Runs in Nigeria

The problem of bank runs is a global phenomenon and often damaging to the banking systems both in developed and developing countries. Monetary authorities always find it very difficult to resolve such a crisis; hence, it became imperative to examine this scenario in the case of Nigeria. Therefore, we examined the effect of demand deposit contracts on the probability of bank runs in Nigeria. This is considered a major contribution to the literature on finance from the perspective of an emerging market economy (EME). In this study, a multilevel Tobit regression approach was employed. This study identified statistically significant and positive effects of liquid assets (total assets) and total loans (total deposits) on bank runs in Nigeria. Based on the results, the study concluded that bank-specific factors have an effect on bank runs, and from these variables, liquid assets/total assets and total loans/total deposits have significant effects on bank runs. As a sequel to the findings and conclusion of this study, it was recommended that to avoid such a banking crisis, there is a need for deposit money banks in Nigeria to maintain adequate liquid assets and ameliorate the high level of deterioration in the quality of risk assets as well as the cost of funds.

TAXATION OF CENTRALISED DRINKING WATER SUPPLY SERVICES WITH VALUE-ADDED TAX

The scientific article is devoted to the issue of reducing the tax burden on such a socially important service as a centralised drinking water supply. The study has determined that the service of centralised drinking water supply is an essential component on the way to achieving universal and equal access to safe and affordable drinking water for everyone in Ukraine. The research shows that the legal form of the utility company as a service provider is the most common for providing water supply services. This form best allows local self-government bodies to conduct their tasks and obligations in the drinking water supply. The study revealed the main features of the water supply service. We established that the service has great social significance and that its main task is not to make a profit but to provide consumers with quality drinking water in sufficient quantity and at an acceptable cost level. Despite its significant social value, the drinking water supply services are subject to value-added tax at the usual rate of 20%. The study found that the drinking water supply services generate significant added value, which results in service providers paying substantial amounts of value-added tax to the state budget. We concluded that such a situation does not correspond with the spirit of providing the population with drinking water and is unacceptable for a heavily subsidised service with many chronic problems, including high levels of deterioration of water supply infrastructure and low coverage of rural areas with centralised water supply. Further, we carried out an analysis of the legislation of the European Union regarding the taxation of water supply services with value-added tax. We determined that most countries of the European Union use the practice of applying a reduced value-added tax rate for the taxation of water supply services. The obtained results justify the further necessity to study the issue of making changes to the tax legislation of Ukraine to apply a reduced value-added tax rate or complete exemption from taxation of the value-added tax for centralised drinking water supply services. Keywords: value-added tax, drinking water supply, utility company, tariff, cost price, reduced rate.

Deterioration Models and Service Life Prediction of Vertical Assets of Urban Water Systems

AbstractThis study proposes a methodology for developing deterioration models and predicting the service lives of vertical assets of urban water systems (i.e., water storage tanks and pumping stations) using regression analysis. The main factors contributing to the deterioration of these assets are analyzed. Simple and multiple linear regression models of average and maximum deterioration are calculated for 22 water storage tanks and 17 wastewater pumping stations. Data on a set of four water storage tanks are used to validate the developed deterioration models. Service life prediction is carried out using the developed models and considering two maximum deterioration levels: the maximum recommended and admissible deterioration levels. Two water storage tanks are further studied to illustrate and discuss the effect of maintenance and rehabilitation interventions on asset service life by comparing the asset deterioration before and after the interventions. Results include simple linear regression models of average and maximum deterioration indices as a function of asset age and multiple linear regression models that incorporate other physical, operational and environmental factors. The results show that simple linear regression models of asset deterioration show a better predictive power than multiple regression models. Despite the higher data variability of multiple regression models, these models allow to include the random process of asset deterioration, through the calculation of the standard deviation. This study also shows that periodic interventions are a preferable maintenance and rehabilitation strategy over major sporadic rehabilitation interventions since it allows to maintain assets in good condition and to extend their service life almost indefinitely.