Maintenance In Order Research Articles

A Semantic Approach to Data Reduction for Weighted Graphs and Complex Queries

Graphs are widely used to store complex data nowadays: social networks, recommendation engines, computer networks and bioinformatics, to name a few. With a rapidly growing amount of data on the Internet in recent years, designing scalable systems to process the huge graph data efficiently has become a critical issue. In order to store and process the graph data efficiently in memory/disk, as well as to save time for transferring the data, graph compression techniques are often used. However, most of the existing graph data compression approaches are syntactic, which means they focus on graph structure and reduce it by serialization or redundancy removal. In this paper we focus on a semantic approach, namely query-based graph data reduction, which reduces a graph by preserving only the information relevant to the queries needed by an application. We study several classical graph problems and their applications, and design a suite of graph reduction algorithms to generate reduced graphs in which an application can still compute the same solutions. In addition, we design a synthesis method that can combine existing graph reduction algorithms to generate a reduced graph for a complex graph problem that includes more than one constraint. We also discuss incremental maintenance in order to update a reduced graph without reprocessing the whole graph again when the original graph is modified. We conduct experiments to compare the reduction rate of our algorithms with different sizes and types of data.

Conservative management of nivolumab-induced pericardial effusion: a case report and review of literature

BackgroundNivolumab is an immune checkpoint inhibitor targeting programmed death-1 protein and has been approved for the treatment of multiple advanced malignancies. Adverse effects of immune checkpoint inhibitors are distinct from conventional cytotoxic chemotherapy and can be life-threatening if left unrecognized. Here, we present a case of nivolumab-induced pericardial effusion successfully managed with high-dose corticosteroids.Case presentationA 70-year-old Caucasian female with a history of 50-pack-year cigarette smoking was diagnosed of recurrent adenocarcinoma of lung after initial surgery. She progressed through multiple lines of chemotherapy and was eventually started on nivolumab. She developed a large pericardial effusion, grade 3 by Common Terminology Criteria for Adverse Events v4.0, about 4 days after receiving first nivolumab treatment. She was treated with oral prednisone at 1 mg/kg daily with gradual resolution of pericardial effusion over 5 weeks while she still received nivolumab every 2 weeks. Prednisone treatment was eventually tapered off about 10 weeks from initial nivolumab treatment. However 1 week after stopping prednisone, she again presented with shortness of breath and bilateral ankle edema, imaging confirmed recurrent pericardial effusion measuring 2.8 cm. Nivolumab was stopped and patient was again started back on prednisone 1 mg/kg daily which resulted in complete resolution of pericardial effusion in 3 weeks. Nivolumab was resumed 1 week afterwards while patient was on tapering dose of prednisone. There was no recurrent pericardial effusion when she continued low-dose prednisone during the remaining course of nivolumab treatment.ConclusionsWith increasing use of immune checkpoint inhibitors, clinicians need to be aware of the unusual immune-related adverse events in order to provide timely management and effective patient care. To our knowledge, this is the first reported case of immune-related pericardial effusion from nivolumab successfully managed with high-dose corticosteroids. Furthermore, recurrent pericardial effusion was prevented by using low-dose corticosteroids as maintenance in order for patient to continue nivolumab treatment.

A new methodology to identify and quantify material resource at a large scale for earth construction – Application to cob in Brittany

A new methodology based on the cross-referencing of spatialized pedological and heritage data is proposed to identify and quantify soil resources available for earth construction. The paper underlines the pedological particularities of areas containing earth heritage and uses these particularities to propose criteria to assess the suitability of soils for modern earth construction. The methodology applied at the regional scale in France (for a given area of 27,200 km2 in Brittany) enabled to specify five new texture classes (balance between clay, silt, sand and gravel content) of suitability for cob soils. This result calls into question recommendations available in the literature.The methodology also provides data on the scale of availability of the resource to repair earth built heritage (cob) or to build new low impact buildings with integrated modern cob walls. In the studied area the potential waste recovery of 2.8 Mt per year is measured, highlighting the large availability of materials for earth construction. At least 23% of earthwork wastes of Brittany are suitable for earth construction (0.7 Mt). However, earth remains a non-renewable material and this resource has to be properly managed, requiring an appropriate building design and maintenance in order to increase longevity and to avoid the use of admixture, preventing earth reversibility at end of life.

In situ continuous monitoring of nitrogen with ion-selective electrodes in a constructed wetland receiving treated wastewater: an operating protocol to obtain reliable data.

Constructed wetlands receiving treated wastewater (CWtw) are placed between wastewater treatment plants and receiving water bodies, under the perception that they increase water quality. A better understanding of the CWtw functioning is required to evaluate their real performance. To achieve this, in situ continuous monitoring of nitrate and ammonium concentrations with ion-selective electrodes (ISEs) can provide valuable information. However, this measurement needs precautions to be taken to produce good data quality, especially in areas with high effluent quality requirements. In order to study the functioning of a CWtw instrumented with six ISE probes, we have developed an appropriate methodology for probe management and data processing. It is based on an evaluation of performance in the laboratory and an adapted field protocol for calibration, data treatment and validation. The result is an operating protocol concerning an acceptable cleaning frequency of 2 weeks, a complementary calibration using CWtw water, a drift evaluation and the determination of limits of quantification (1 mgN/L for ammonium and 0.5 mgN/L for nitrate). An example of a 9-month validated dataset confirms that it is fundamental to include the technical limitations of the measuring equipment and set appropriate maintenance and calibration methodologies in order to ensure an accurate interpretation of data.

Background Subtraction Based on Perception-Contained Piecewise Memorizing Framework

A key issue for full-time video surveillance is to search or establish a reference image of background which corresponds to current video frame. However, background that was ever in presence long time ago is enclosed or discarded due to background forgetting assumption. How to rapidly pick up or even rebuild long-term background needs to be discussed. This paper aims to present a framework for background maintenance in order to solve the problem. A piecewise memorizing framework is proposed for matching, updating and even rebuilding long-term background. Based on the metaphors of psychological selective attention theory, the framework is composed of a prior piecewise perception processor for intensity stationary test. Besides, a hierarchical memorizing mechanism constitutes the other part of the framework for overcoming the exponential forgetting of long period background appearances. Applied to Gaussian mixture model (GMM), this framework is capable of maintaining short-term background states, identifying long period background appearances, and rapidly adjusting to new background states according to different expressions derived from the prior perception of scene intensity changes. Its effectiveness can be demonstrated by experimental results for solving various typical problems.

Protection Coatings for the Underwater Part of Ship’s Hull

In this article authors present a general consideration of the underwater part of ship’s hull protection by protective coatings, paying particular attention to antifouling paints. Following the presentation of the importance of ship’s hull maintenance and protection in order to make navigation safer and to keep the ship in operation for as long as possible, a summary is made of the main types of antifouling products used throughout the history up to the present time. As far back as a thousand years BC, people had developed techniques to protect objects from falling into disrepair and understood the importance of preserving construction materials in order to prolong their useful life and value. Marine industry has been developing day by day and attention is increasingly focused on the safety of ships and crews, as well as on the protection of marine environment. Tin-free self-polishing copolymer (SPC) and foul release technologies are currently applied, in addition to many alternative solutions being suggested. Modern approaches to effective environment-friendly antifouling systems and their performance are highlighted.

Perencanaan Desain Teknis Situs Megalitikum Gunung Padang Sebagai Objek Wisata Di Kab.Cianjur

Megalithic site of Mount Padang is andent relics that have high value for Indonesia. The site is located 50 kilometers southwest Cianjur, West Java. The research objective was to determine the existence of the site, and planned as a tourism destination that may impact either directly or indirectly to the public. The method used is descriptive not only describe, but also perform the analysis and interpretation of data. The approach used in this study is qualitative. Cultural values that can be contained as various studies and are preferred for the sake of tourism. Conservation of cultural heritage sites as high an initiative of the stakeholders in maintaining, saving and utilizing high cultural value such as social capital and economic assets. The authors suggest that the megalithic site of Mount Padang is a megalithic sites that must be maintained existence. Therefore, the local government in collaboration with local communities are able to maintain and preserve the cultural heritage of the ancestors in order to still be able to enjoy the tourists in the future. In maintaining and rescue cultural heritage sites there should be continuous assessment of the methods and techniques of conservation of various artifacts that the values contained in it maintained its integrity. Methods and techniques that do besides using modern ways as well by utilizing indigenous knowledge usual local communities. In addition to improving the condition of conservation of the site will also be necessary rescue techniques assorted artifacts of the site, in the structuring, storage, and maintenance in order that the objects were well maintained

‘Everyone wants a community’: a qualitative investigation of the challenges and service needs among college students in recovery

Background: Problem drinking and illicit drug use is prevalent among college students, which can pose challenges for students in recovery from substance use disorders (SUDs). Collegiate recovery programs (CRPs) are emerging across the U.S. in order to provide support services for these students. Yet the population of college students in recovery still remains understudied. The objectives of this research were to explore (1) perceived service needs, and (2) opinions about the logistics of a CRP among a sample of college students in recovery.Methods: Semi-structured interviews were conducted with 13 students who self-identified as being in recovery from SUDs. Interviews were transcribed and coded using content analysis.Results: The sample of students was slightly older than traditional college students (M= 25 years). Due to age and lifestyle differences, such as sobriety, these students often felt isolated and unable to relate to the wider student body. Students also felt limited in their options for recovery support services and they expressed the desire for a formalized on-campus community, such as a CRP. Most stressed that a CRP should have flexibility in program acceptance and maintenance in order to serve all students in need.Conclusions: The results suggest the need to for college campuses, both in the US and abroad, to conduct assessments of the perceived need for recovery support services among students. While substance abuse services may be available, students may not feel they are adequate to support their unique needs as both as a student and in recovery from SUDs.

The efficiency of tram articulations compared to vibroacoustic emissions

Human quality of life is constantly increasing, and so does the comfort of travel by various means of public transport, especially rail transport. One of the more crucial criteria for assessment of travel comfort is vibroacoustic comfort. This aspect is also substantial among rail vehicle operators and manufacturers. Sound quality evaluation is related to psychoacoustic indicators, but reducing the levels of acoustic pressure does not always correlate to increased quality of the perceived sound and improvement of human sound perception. Moreover the cause of unpleasant noise has to be taken into consideration. In many examples it is induced by specific vibrations and/or friction forces through components. The following article presents experimental research carried out in the in-situ conditions, testing the quality of work carried out by tram articulations considering vibroacoustic emissions. Several measurements were taken of vibroacoustic signals in several urban rail vehicles of the same type. Two different trams were chosen for analysis and their vibroacoustic emission levels as well as sound quality parameters were compared. One of the more crucial aspects of the research was to determine the dependency between vibrations around the area of articulations and squealing noise. The results indicate a large correlation between signals and deterioration in the work quality of the articulation in the given tram. Moreover, the authors suggest expanding on currently carried out maintenance in order to minimise inconvenient vibroacoustic phenomena during use.

A formal framework of human–machine interaction in proactive maintenance – MANTIS experience

ABSTRACTThe general concept of MANTIS project is to provide a proactive maintenance service platform architecture that allows to monitor essential system parameters and schedule maintenance in order to predict and prevent imminent failures. Human–machine interaction (HMI) is an important integral part of the platform by providing the right information in the right modality to the users when needed. As MANTIS comprises 11 distinct industrial use cases, the design of such HMI presents a great challenge. The framework presented in this paper originates from the scenario-based design and can be treated as a part of the overall scenario-based usability engineering approach. The framework has been conceived from an extensive list of HMI features extracted from the descriptions of use-case scenarios provided by each industrial partner. Due to the broad range of representative industry environments including production asset maintenance, vehicle maintenance, energy production management and health equipment maintenance we believe that the resulting HMI framework can be applied in different cases in practice and the paper would also be of general interest to the readers.

Impact Capacity Reduction in Railway Prestressed Concrete Sleepers with Surface Abrasions

Railway sleepers (also called ‘railroad tie’ in North America) embedded in ballasted railway tracks are a main part of railway track structures. Its important role is to transfer the loads evenly from the rails to a wider area of ballast bed and to secure rail gauge and enable safe passages of rolling stocks. By nature, railway infrastructure is nonlinear, evidenced by its behaviours, geometry and alignment, wheel-rail contact and operational parameters such as tractive efforts. Based on our critical review, the dynamic behaviour of railway sleepers has not been fully investigated, especially when the sleepers are deteriorated by excessive wears. In fact, the ballast angularity causes differential abrasions on the soffit or bottom surface of sleepers (especially at railseat zone). Furthermore, in sharp curves and rapid gradient change, longitudinal and lateral dynamics of rails increase the likelihood of railseat abrasions in concrete sleepers due to the unbalanced loading conditions. This paper presents a structural capacity of concrete sleepers under dynamic transient loading. The modified compression field theory for ultimate strength design of concrete sleepers under impact loading will be highlighted in this study. The influences of surface abrasions, including surface abrasion and soffit abrasion, on the dynamic behaviour of prestressed concrete sleepers, are firstly highlighted. The outcome of this study will improve the rail maintenance and inspection criteria in order to establish appropriate and sensible remote track condition monitoring network in practice. Moreover, this study will also improve the understanding of the fundamental dynamic behaviour of prestressed concrete sleepers with surface abrasions. The insight into these behaviours will not only improve safety and reliability of railway infrastructure but will enhance the structural safety of other concrete structures.

Time-Dependent Topology of Railway Prestressed Concrete Sleepers

The railway sleepers are very important component of railway track structure. The sleepers can be manufactured by using timber, concrete, steel or other engineered materials. Nowadays, prestressed concrete has become most commonly used type of sleepers. Prestressed concrete sleepers have longer life-cycle and lower maintenance cost than reinforced concrete sleepers. They are expected to withstand high dynamic loads and harsh environments. However, durability and long-term performance of prestressed concrete sleepers are largely dependent on creep and shrinkage responses. This study investigates the long-term behaviours of prestressed concrete sleepers and proposes the shortening and deflection diagrams. Comparison between design codes of Eurocode 2 and AS3600-2009 provides the insight into the time-dependent performance of prestressed concrete sleepers. The outcome of this paper will improve the rail maintenance and inspection criteria in order to establish appropriate sensible remote track condition monitor network in practice.

PROPOSED FRAMEWORK FOR APPLYING BALANCED SCORECARD MODEL OF PERIODICAL MAINTENACE AIMING TO ACHIEVE SUSTANABLE DEVELOPMENT - APPLIED STUDY FOR USERS OF GAS COOKERS IN GREATER CAIRO DISTRICTS

This study belongs to the pattern of experiential experimental studies for analytical descriptive as it is the most appropriate types of studies suitable for the nature of the subject of the study which aims to describe and analyze the balanced performance of the periodic maintenance in order to achieve sustainable development and our desire to know and define scientifically help us to reach a proposed framework for implementing the balanced performance model of maintenance Periodic. Thus, we can obtain facts through information, interpret them, draw conclusions, develop indicators that help reduce consumption in natural gas, provide for sustainable development processes, rational use of energy and its source. This study is one of the descriptive descriptive studies that measure the relationship between two independent variable variables, In maintenance maintenance and dependent variable is the achievement of sustainable development. And this is what is achieved by the study of the rundown of the results obtained by the researcher, so it is natural that the maintenance of gas stove users more attention. Because of its attachment through which it seeks the extent of interest of the state represented in the maintenance companies. The fields of study in the spatial, human and temporal domains were determined by the spatial sphere. For users of gas stoves in the Greater Cairo regions. The human area of the current study is a vertical sample for the users of gas stoves in the Greater Cairo regions. The time zone determines the time domain of the study in the period of implementation of the balanced performance section in the maintenance process and collecting the data from the study sample, from 15/1/2015 to 15/1/2016. After data collection and review, the data was automatically unloaded using SPSS 16.2 version. The following statistical parameters were used: arithmetic mean, standard deviation and weighted mean, test (T) for one sample to identify the total psychological stress and total compliance score of the Sample One sample T test , as well as a test of two separate samples Sample t test Independent . ANOVA WAY ONE. A CHAVI test was used to determine the location of the function differences in the case of the function differences and the Pearson correlation coefficient.

MCMC-based Efficient Maintenance Plan Decision

In recent years, it has been an essential policy to monitor real-time health states of facilities and determine when to perform maintenance in order to ensure the high operation atio and improve work efficiency. In this paper, target facilities diagnose their own health states by analyzing timeseries sensor data and transmit warning data and failure data to the monitoring center. These data include date and time of occurrence and warning/failure code which identifies the factor. Utilizing these data, we propose an MCMC-based maintenance plan decision to reduce the failures and the workloads. Firstly, state-based warning patterns which are composed of several warning codes are extracted. At that time, to avoid the state explosion, only warning patterns which are closely related to failure occurrence are extracted based on the time interval from warning states to failure state. Secondly, warning patterns are modeled based on N-th order Markov model. Finally, maintenance plan is decided based on failure probability. Experiment to evaluate whether the facilities can be maintained before failure occurs proved that this approach could actually reduce the number of failures and the frequency of dispatches of maintenance workers.

Tracking Algorithms for Cooperative Telemaintenance Repair Operations

This paper broaches the issue of using 2D tracking algorithm frameworks on mobile devices in order to enable cooperative repair tasks in robot-operated industrial production. A local service technician can be supervised remotely by an external expert in the context of telemaintenance. At first we introduce several tracking libraries and test them on low-performance mobile devices. After that we conduct a test run on a large amount of pictures derived from video streams with different characteristics of the application area of industrial maintenance and repair operations in order to find the best suited algorithm. At the end we describe the implementation on several mobile devices and delay considerations.

Diet, physical activity and behavioural interventions for the treatment of overweight or obese children from the age of 6 to 11 years.

Diet, physical activity and behavioural interventions for the treatment of overweight or obese children from the age of 6 to 11 years.

Exercise as antidepressant treatment: Time for the transition from trials to clinic?

Mental health and wellbeing are particularly salient during adolescence and young adulthood, with the age of onset of most mental disorders occurring between 12 and 25 years. Therefore, this is a critical time to provide early intervention to promote recovery and establish positive long-term health-related behaviors. With the aim to establish safer and potentially less complex interventions for youth mental health, interest in physical activity and exercise interventions has grown. These interventions have been shown to be highly acceptable and nonstigmatizing as a treatment approach; which is important to young help-seeking young people. This chapter reviews the evidence for exercise interventions for young people experiencing mental health concerns or a diagnosed mental disorder. The emerging evidence supports the use of physical activity and exercise interventions in youth mental health; however, further research is required to determine the required type, intensity, duration, and frequency to increase enjoyment and maintenance in order to maximize health and mental health outcomes in young people with mental health concerns.

THEORETICAL STUDY ABOUT THE INFLUENCE OF PREDICTIVE MAINTENANCE ON PROCESS EQUIPMENT LIFETIME

This study shows the benefits of the modern methods application of the predictive maintenance in order to detect and diagnosis of rolling bearings wear. From the large amount of domains where predictive maintenance has been applied, there have been chosen to be case studied the equipment which have rolling bearings as components. Rolling bearings are predisposed to a premature wear because of the execution and mounting quality, of the very numerous cycles of operation, of loading conditions during the production operation, or of the improper lubrication, etc.. By applying modern wear detection methods of rolling bearings, the causes of producing it can be identified and all of them could be set aside in order to get an increasing lifetime of rolling bearings and of the process equipment.

Use of everolimus in liver transplantation.

In recent years, the use of mammalian target of rapamycin inhibitors has gained traction in their use as alternative or adjunct immunosuppressants in the post-liver transplantation (LT) setting. The efficacy of everolimus (EVR) in de novo LT is established and a reasonable time to initiate EVR is 30 d from LT surgery. Initiating EVR early post-LT allows for calcineurin inhibitor (CNI) reduction, thus reducing nephrotoxicity in LT recipients. However, data is inadequate on the appropriate timing for conversion from CNI to EVR maintenance in order to achieve optimal renoprotective effect without compromising drug efficacy. Adverse effects of proteinuria, hypercholesterolemia and hyperlipidemia are significantly higher as compared to standard CNI and long-term implications on graft and patient survival in LT is still unclear. Future research to explore strategies to minimise EVR adverse effects will be crucial for the success of EVR as an important alternative or adjunct immunosuppressive therapy in LT.

Prognostic and Health Management System for Fly-by-wire Electro-hydraulic Servo Actuators for Detection and Tracking of Actuator Faults

Maintenance of flight control actuation systems is currently performed on a scheduled basis, however air fleet operators and component manufacturers are willing to move from scheduled maintenance to Condition Based Maintenance (CBM) in order to reduce maintenance costs and improve aircraft dispatchability. Prognostics and Health Management (PHM) systems are a critical part of CBM and are perceived as a breakthrough technology to effectively respond to an urgent and critical need to improve the readiness, availability, reliability, safety and maintainability of aerospace vehicles. This paper presents the results of an ongoing research activity focused on the development of a PHM system for fly-by-wire Electro-Hydraulic Servo Actuators (EHSA) without adding new sensors. The PHM system is being developed with the objective of detecting the most common faults, according to a failure mode effects and criticality analysis (FMECA). The paper describes in particular the tools used for detection and tracking of internal leakage faults of the hydraulic actuator, which is one of the most common faults of hydraulic servo-actuators in service, and for predicting its remaining useful life (RUL). The research work has been supported by the development of a nonlinear model for a reference EHSA, that has been implemented using physical equations and system parameters, taking into account environmental condition and disturbances. The model was validated through tests runs on a flight control actuator of a civil aircraft. Simulations are performed in nominal conditions and with progressive injection of degradation to verify the PHM algorithm. The performances of the PHM algorithms are evaluated by means of proper metrics.