Quality Control Work Research Articles

Respiratory medical quality control system construction in China.

The construction of a quality control system for respiratory medicine is of great significance for improving the quality and homogenization of the diagnosis and treatment of respiratory diseases. The national respiratory quality control work conducted by the China National Respiratory Medicine Quality Control Center was summarized.

A Quality Control System for Historical In Situ Precipitation Data

ABSTRACT In this study, a comprehensive quality control (QC) system for in-situ precipitation data records was developed and applied to Canadian in situ precipitation datasets. The system includes a pair of screening procedures to screen for two types of random errors: one procedure is applied to the untransformed monthly total precipitation data series, which is good at finding erroneous data of unusually large values; another is applied to the log-transformed monthly precipitation data (in mm) series, log(P + 0.1), which is good at identifying erroneous zero or near-zero monthly total precipitation amounts. The system then applies three QC (threshold, kriging, and temporal) tests and a decision-making process to confirm whether the screened suspects are erroneous. There is generally good agreement between all the QC tests, while the decision-making process yields the most accurate results when compared to the manually reviewed results. The QC work on Canadian precipitation data sets revealed that it is necessary to apply a pair of screening procedures to identify both types of random errors. All the monthly values identified to be erroneous are set to missing, and so are the corresponding daily values, while keeping records of the original data.

Modeling of defects in ultrasonic flaw detection. Status and prospects

In the introduction to the article four factors, which are most important for ensuring the accuracy of defect parameters measurements at ultrasonic inspection, are mentioned: parameters of artificial reflectors in samples, compliance of acoustic properties of material of tuning samples and controlled products, transient characteristics of electroacoustic paths, methodological features of measurements. The present article is devoted to the analysis of the first and partly fourth of listed factors. The review of reflectors, the use of which is regulated in various standards, is carried out. Advantages and disadvantages of flat-bottomed holes, segmental and angular reflectors (“notches”), lateral (BCO) and vertical cylindrical drills, grooves are noted. Taking into account the peculiarities of ultrasonic wave scattering, it is noted that artificial “reflectors” such as “grooves” and BCOs are used to adjust the parameters of modern diffraction control methods. It is recommended to expand the use of grooves, BCO and vertical drilling in the revision of standards governing the use of classical echo-methods. The estimation of accuracy of measurement of defects parameters, first of all — coordinates of crack tip, with application of modern digital methods of information processing at ultrasonic control is given. It is indicated that to increase the accuracy of measurements, to determine the position and orientation of cracks in welds, it is necessary to create a database of digital doubles of samples with artificial reflectors and products with real defects. The general scheme of quality control work execution is given, taking into account the use of standards (measures), digital models of artificial reflectors and digital twins of the control process to ensure the necessary detectability of defects and reliability of manual, automated and, potentially, automatic control.

Analysis of sterilizer allocation and related factors in dental health-care settings in Yunnan Province, China: a cross-sectional study

ObjectiveTo investigate the status and related factors of sterilizers in dental health-care settings in Yunnan Province, with the aim of providing a theoretical basis for the health administrative department to formulate regional quality control programs and systems, proposing reasonable suggestions for optimizing the allocation of sterilizer resources in Yunnan’s dental health-care settings, thereby improving resource utilization efficiency.MethodsThis cross-sectional survey was conducted in 2600 dental health-care settings in Yunnan Province in March 2020. Uni-variable linear regression, multi-variable linear regression, curve fitting and threshold effect analysis were used to understand the relationship between dental units and sterilizers.ResultsA total of 2600 dental health-care settings were included. The disinfection and sterilization work were mainly completed by the dental department in 1510(58.1%) institutions. 44(1.7%) institutions were not allocated sterilization equipment, and 1632 (62.8%) had only one sterilizer. The median allocation of sterilizers was 1.0. Uni-variable linear regression showed significant differences in covariates such as dental unit, dental handpiece, disinfection equipment, dentist, and dental assistant, which were more sensitive (p < 0.001) and statistically significant. The adjusted model was more stable in the multi-variable linear regression, and the differences in covariates between different settings were statistically significant. Curve fitting revealed an S-shaped curvilinear relationship between the number of dental units and sterilizers in oral healthcare settings.ConclusionThe disinfection and sterilization work was mainly completed by the dental department in dental health-care settings in Yunnan Province. Sterilizer allocation increases with the number of dental units, but some institutions have insufficient allocation of sterilizer and manpower resources, resulting in certain risks of infection control. Thus, it is necessary to strengthen supervision, inspection and regional quality control work in infection control of dentistry.

The experience on the construction of the cluster prevention and control system for COVID-19 infection in designated hospitals during the period of "Category B infectious disease treated as Category A"

The COVID-19 epidemic has spread to the whole world for three years and has had a serious impact on human life, health and economic activities. China's epidemic prevention and control has gone through the following stages: emergency unconventional stage, emergency normalization stage, and the transitional stage from the emergency normalization to the "Category B infectious disease treated as Category B" normalization, and achieved a major and decisive victory. The designated hospitals for prevention and control of COVID-19 epidemic in Tianjin has successfully completed its tasks in all stages of epidemic prevention and control, and has accumulated valuable experience. This article summarizes the experience of constructing a hospital infection prevention and control system during the "Category B infectious disease treated as Category A" period in designated hospital. The experience is summarized as the "Cluster" hospital infection prevention and control system, namely "three rings" outside, middle and inside, "three districts" of green, orange and red, "three things" before, during and after the event, "two-day pre-purification" and "two-director system", and "one zone" management. In emergency situations, we adopt a simplified version of the cluster hospital infection prevention and control system. In emergency situations, a simplified version of the "Cluster" hospital infection prevention and control system can be adopted. This system has the following characteristics: firstly, the system emphasizes the characteristics of "cluster" and the overall management of key measures to avoid any shortcomings. The second, it emphasizes the transformation of infection control concepts to maximize the safety of medical services through infection control. The third, it emphasizes the optimization of the process. The prevention and control measures should be comprehensive and focused, while also preventing excessive use. The measures emphasize the use of the least resources to achieve the best infection control effect. The fourth, it emphasizes the quality control work of infection control, pays attention to the importance of the process, and advocates the concept of "system slimming, process fattening". Fifthly, it emphasizes that the future development depends on artificial intelligence, in order to improve the quality and efficiency of prevention and control to the greatest extent. Sixth, hospitals need to strengthen continuous training and retraining. We utilize diverse training methods, including artificial intelligence, to ensure that infection control policies and procedures are simple. We have established an evaluation and feedback mechanism to ensure that medical personnel are in an emergency state at all times.

Potential of external (in air) particle induced gamma-ray emission method for the preparation of isotopic composition of boron in-house reference standard in boron carbide matrix for quality control work

In-house reference standards for isotopic compositions of boron in natural and enriched boron carbide matrix were prepared using external PIGE methods.

Evidence-based guidelines for the diagnosis and treatment of Kawasaki disease in children in China (2023)

Kawasaki disease (KD) is an acute self-limiting vasculitis, and it is the most common cause of acquired heart disease in children under 5 years old. One of the improvement goals in pediatric quality control work for the year 2023, as announced by the National Health Commission, is to reduce the incidence of cardiac events and KD-related mortality in children with KD. In order to standardize the diagnosis, treatment, and long-term management practices of KD in China, and effectively prevent and reduce the incidence of coronary artery lesions and long-term adverse effects, the guideline working group followed the principles and methods outlined by the World Health Organization and referenced existing evidence and experiences to develop the "Evidence-based guidelines for the diagnosis and treatment of Kawasaki disease in children in China (2023)". The guidelines address the clinical questions regarding the classification and definition of KD, diagnosis of different types of KD, treatment during the acute phase of KD, application of echocardiography in identifying complications of KD, and management of KD combined with macrophage activation syndrome. Based on the best evidence and expert consensus, 20 recommendations were formulated, aiming to provide guidance and decision-making basis for healthcare professionals in the diagnosis and treatment of KD in children.

Safety Management and Quality Control in Hydraulic Engineering Construction

Water conservancy projects are important infrastructure projects related to the national economy and people's livelihood, which have great help for the development of transportation and agriculture, and can bring great economic benefits. In the construction of water conservancy projects, due to the complexity of construction technology and the difficulty of construction, it is easy to form safety hazards. In addition, due to the large scale of construction, the large number of construction units, and the complex construction methods, it will also have a negative impact on the quality control work. The importance and existing problems of safety management and quality control in water conservancy project construction are analyzed. On this basis, safety management strategies and quality control strategies are discussed respectively, with a view to providing reference for safety management and quality control in water conservancy project construction.

RESEARCH ON KEY POINTS OF QUALITY INSPECTION OF AERIAL PHOTOGRAMMETRY RESULTS AND QUALITY IMPROVEMENT MEASURES

Abstract. In recent years, the quality control of surveying, mapping and geographic information engineering has attracted much attention because of its importance. On the basis of the quality control of the first phase of the 927 project and the western surveying and mapping project, in response to the supervision needs of major national surveying, mapping and geographic information projects, this paper is based on the needs of surveying and mapping supervision, characteristics, development status, this paper analyzes the limitations of traditional surveying and mapping supervision in national major surveying and mapping geographic information projects, and proposes an improved surveying and mapping supervision method, namely the concept of surveying and mapping technical supervision. The research determines that the content of technical supervision is divided into two parts: quality management control and stage achievement quality control, and analyzes its application characteristics. Through the application and effect analysis of technical supervision in actual projects, the advantages and feasibility of technical supervision are verified, which can effectively overcome the limitations of traditional surveying and mapping supervision. The research content of this paper can guide the development of the corresponding quality control work, and provide a reference for the quality control of major national projects.

Temperature-Compensated Interferometric High-Temperature Pressure Sensor Using a Pure Silica Microstructured Optical Fiber

We present a high-temperature interferometric pressure sensor using a simple-design and easy-to-fabricate pure silica four-hole novel microstructured optical fiber. The asymmetric geometry of the fiber allows hydrostatic pressure to induce stress at the optical fiber core, which converts to an interferometric shift. The large core of the fiber supports the propagation of several modes. Multimode interference created between different pairs of modes is used to sense the temperature and pressure change. The use of pure silica fiber is motivated by the ability of this fiber to operate up to high temperature as dopant diffusion is avoided. The sensor is demonstrated to measure pressure at a temperature up to 800 °C. We demonstrate temperature compensation using a Fourier approach to monitor different interference pairs and their phase response to pressure and temperature change. Experimental results show that the sensor has a linear response and excellent stability with a detection limit of 8.86 kPa at 800 °C temperature. This simple, compact, and potentially low-cost sensor is promising for harsh environment applications to improve quality control, operation efficiency, and safe working conditions.

Research and Practice on the Quality Control of Medical Equipment Combined with the Overall Maintenance Service of Medical Equipment

<i>Purpose </i>In the face of the problems in medical equipment quality control, such as manpower shortage, lack of standardization, insufficient quality control equipment and weak information means, the implementation methods of medical equipment quality control are improved effectively by reorganizing the key points of quality control and introducing the overall maintenance service of medical equipment. <i>Methods</i> On the basis of researching and determining the quality control objects of medical equipment, formulating the work content of medical equipment quality control and supporting special quality control record sheets, formulating the work plan of medical equipment quality control, and adjusting the quality control content in time according to the actual clinical needs, our hospital has passed and the overall maintenance company of medical equipment cooperates closely and obtains the support of manpower, quality control equipment and information management tools to ensure that the quality control of medical equipment is in place. <i>Result </i>Through the standardization of medical equipment quality control, the efficiency of medical equipment quality control has been significantly improved, and the operation quality failure rate of quality control objects has decreased year by year, and we can find the hidden trouble of medical equipment operation quality and solve it accordingly. In addition, compared with hospital engineers, there is a certain gap in the medical equipment quality control ability of maintenance engineers in medical equipment overall maintenance service companies. At the same time, there are still some shortcomings in the coverage of quality control work. <i>Conclusion</i> Overall medical equipment maintenance service is conducive to the implementation of medical equipment quality control, and quality control is effective in improving the operation quality of medical equipment, and can guarantee the safety of medical service, but there is still a large space for improvement.

First-order derivative synchronous spectrofluorimetric determination of two antihypertensive drugs, metolazone and valsartan, in pharmaceutical and biological matrices

In this study, a facile, rapid, and sensitive spectrofluorimetric method was evolved to analyse two antihypertensive drugs, namely, metolazone (MTZ) and valsartan (VST), in pharmaceutical and biological matrices. Both analytes exhibited intrinsic fluorescence activities which were significantly affected by environmental factors such as pH and solvent systems. However, simultaneous determination of MTZ and VST by conventional spectrofluorometry cannot be achieved simply because of the strong overlap between their fluorescence spectra. Thus, a combination of derivative and synchronous spectrofluorometry was conducted to overcome this dilemma. The proposed method relies on measurement of the first-order derivative of synchronous fluorescence intensity of the studied drugs at Δλ = 160 nm using 0.1 M acetic acid as the optimum solvent. The amplitudes of the first derivative synchronous fluorescence spectra of MTZ and VST were recorded at 236.0 nm (zero-crossing point of VST) and at 262.8 nm (zero-crossing point of MTZ) for simultaneous analysis of MTZ and VST, respectively. The fluorescent method was optimized efficiently to get the maximum selectivity and sensitivity by investigating different solvents, different buffer pHs, and different surfactants. The highest sensitivity and selectivity were achieved when 0.1 M acetic acid was used as a solvent. The method showed a linear concentration range of 10.0–100.0 ng mL−1 and a limit of detection of <3.0 ng mL−1 for each analyte. Statistical data analysis confirmed that no significant difference between the proposed spectrofluorometric method and the reference methods. The validity of the proposed spectrofluorometric method approved its suitability for quality control work. The proposed spectrofluorometric method was applied to assay the studied drugs in pharmaceutical dosage and in biological matrices with acceptable %recoveries and small RSD values.

Design of automatic spray monitoring and tele-operation system based on digital twin technology

To solve the problems of low degree of automation, difficulty in quality control and poor working environment during the process of spray-painting rotational parts, this paper designs an automatic spray monitoring and tele-operation system based on digital twin technology, which can realize real-time monitoring and tele-operation fault treatment during the spraying process to achieve the goal of “man-machine isolation”. First, an automatic production line for spraying operations is designed in which the spraying equipment can be remotely controlled. Then, multiple sensors are used to collect the environmental and equipment conditions. After that, multisource heterogeneous data are pretreated to construct a unified data template and interfaces. On this basis, a three-dimensional model of the environment and equipment is established. According to the fusion and mapping between sensor data and the geometric model, an augmented reality twin model of spray painting is obtained. Additionally, the relevant support database and knowledge base are established; a fault diagnosis method based on knowledge is proposed to provide support for fault treatment. Finally, an automatic spraying monitoring and tele-operation software platform is developed that can run under monitoring or tele-operation mode, and the related functions are tested and verified. The test results show that the system is more efficient than manual spraying method, and the coating surfaces is flatter, effectively reducing the probability of sagging, orange peel, missing spray and other problems. This research provides a reference for the design and construction of automatic spraying production lines.

Modernization of the bench KI-28097M-03 to assess the quality of repair of regulated hydraulic units

The article presents a prototype of the modernized KI-28097M-03 stand, which provides quality control work for the repair of regulated hydraulic units for modern tractors, self-propelled machines, industrial, agricultural, communal purposes. The use of the stand will allow service enterprises of dealers to minimize the downtime of equipment, improve the quality of repairs, expand the range of services provided to carry out warranty and post-warranty technical support of the equipment being sold.

P–797 A novel method for establishing human embryonic stem cells independent of feeder cells

Abstract Study question Is there a efficient establishing method of human embryonic stem cells directly from the human blastocysts independent of feeder cells? Summary answer We established a novel method of generating human embryonic stem cells directly from human blastocysts independent of feeder layer cells. What is known already Establishing embryonic stem cells lines mainly needed to coculture ICM clumps with feeder cells (like mouse or human fibroblasts) ,this brought in potential heterogeneous pollution.Although there had be some reports about generating human ESCs independent of feeder cells,but the efficiency was low and conditioned medium were unstable and also had the biological contamination. Study design, size, duration We used ten day5/6 donated human blastocysts from our reproductive center ,most of them were genetically diseased embryos with abnormal PGT diagnosis.After establishing ESCs procedure , all the cell lines were identified with pluripotency and differentiation potential tests.The success rate of system was calculated and compared with the conventional methods. Participants/materials, setting, methods In brief, ICM clumps were separated mechanically by using a micromanipulation system,and then transferred to a 30ul mTESR plus culture media drop pretreated with the geltrex (1:100 dilution) matrix and oxygen concentration was 5%. When cells attached and migrated,we also used laser to destroy the remaining trophoblast cells.About 10 days,the typical ES clone can be mechanically passaged and cells can be cultured in normal oxygen concentrations after passage 2. . Main results and the role of chance Using this method we had successfully established nine embryonic stem cell lines from donated human blastocysts ,the success rate was 90% (9/10). Each cell lines had passed the evaluation test of embryonic stem cell. When compared with the conventional feeder cells dependent method,our novol methods not only eliminated the pollution from heterogeneous cells,but also had higher success rate (90% vs 25%). Limitations, reasons for caution Due to the scarcity of donated human blastocysts, this experiment was a single-center experiment with small samples. Wider implications of the findings: We speculated that the batch differences of culture dishes, matrix and culture medium might affect the establish efficiency , and how to carry out a high level of quality control work might be the key factor to keep the system stable. Trial registration number basic research

P-797 A novel method for establishing human embryonic stem cells independent of feeder cells

Abstract Study question Is there a efficient establishing method of human embryonic stem cells directly from the human blastocysts independent of feeder cells? Summary answer We established a novel method of generating human embryonic stem cells directly from human blastocysts independent of feeder layer cells. What is known already Establishing embryonic stem cells lines mainly needed to coculture ICM clumps with feeder cells (like mouse or human fibroblasts), this brought in potential heterogeneous pollution. Although there had be some reports about generating human ESCs independent of feeder cells, but the efficiency was low and conditioned medium were unstable and also had the biological contamination. Study design, size, duration We used ten day5/6 donated human blastocysts from our reproductive center, most of them were genetically diseased embryos with abnormal PGT diagnosis. After establishing ESCs procedure, all the cell lines were identified with pluripotency and differentiation potential tests. The success rate of system was calculated and compared with the conventional methods. Participants/materials, setting, methods In brief, ICM clumps were separated mechanically by using a micromanipulation system,and then transferred to a 30ul mTESR plus culture media drop pretreated with the geltrex (1:100 dilution) matrix and oxygen concentration was 5%. When cells attached and migrated,we also used laser to destroy the remaining trophoblast cells. About 10 days,the typical ES clone can be mechanically passaged and cells can be cultured in normal oxygen concentrations after passage 2.. Main results and the role of chance Using this method we had successfully established nine embryonic stem cell lines from donated human blastocysts, the success rate was 90% (9/10). Each cell lines had passed the evaluation test of embryonic stem cell. When compared with the conventional feeder cells dependent method,our novol methods not only eliminated the pollution from heterogeneous cells,but also had higher success rate (90% vs 25%). Limitations, reasons for caution Due to the scarcity of donated human blastocysts, this experiment was a single-center experiment with small samples. Wider implications of the findings We speculated that the batch differences of culture dishes, matrix and culture medium might affect the establish efficiency, and how to carry out a high level of quality control work might be the key factor to keep the system stable. Trial registration number basic research

Strategi Kepemimpinan: Quality Continuous Improvement SMP Islam Prestasi Al Mubtadi-Ien Bantul Yogyakarta

The principal's leadership becomes a reference for managing other school resources for school development. The role of the principal is very important for school quality control work. This article aims to provide a specific description of the principal's leadership strategy in sustainable quality assurance. The method used is qualitative with data collection techniques in the form of interviews, observations, and documentation. The research was conducted at the Islamic Achievement Middle School in Bantul, Yogyakarta. This school is interesting because it tries to combine the concept of multiple intelligence with the pesantren-style school system. The results of the study indicate that the strategy used by the principal can have an effect on school development. Although in practice it has not yet reached the level of activity in the theoretical structure of PDCA (Plan Do Check Action), the principal continues to develop school quality.

Effects of Chronic Secondhand Smoke (SHS) Exposure on Cognitive Performance and Metabolic Pathways in the Hippocampus of Wild-Type and Human Tau Mice.

Background:Exposure to secondhand smoke (SHS) is a risk factor for developing sporadic forms of sporadic dementia. A human tau (htau) mouse model is available that exhibits age-dependent tau dysregulation, neurofibrillary tangles, neuronal loss, neuroinflammation, and oxidative stress starting at an early age (3–4 months) and in which tau dysregulation and neuronal loss correlate with synaptic dysfunction and cognitive decline.Objective:The goal of this study was to assess the effects of chronic SHS exposure (10 months’ exposure to ) on behavioral and cognitive function, metabolism, and neuropathology in mice.Methods:Wild-type (WT) and htau female and male mice were exposed to SHS (90% side stream, 10% main stream) using the SCIREQ® inExpose™ system or air control for 168 min per day, for 312 d, 7 d per week. The exposures continued during the days of behavioral and cognitive testing. In addition to behavioral and cognitive performance and neuropathology, the lungs of mice were examined for pathology and alterations in gene expression.Results:Mice exposed to chronic SHS exposure showed the following genotype-dependent responses: a) lower body weights in WT, but not htau, mice; b) less spontaneous alternation in WT, but not htau, mice in the Y maze; c) faster swim speeds of WT, but not htau, mice in the water maze; d) lower activity levels of WT and htau mice in the open field; e) lower expression of brain PHF1, TTCM1, , and HSP90 protein levels in WT male, but not female, mice; and f) more profound effects on hippocampal metabolic pathways in WT male than female mice and more profound effects in WT than htau mice.Discussion:The brain of WT mice, in particular WT male mice, might be especially susceptible to the effects of chronic SHS exposure. In WT males, independent pathways involving ascorbate, flavin adenine dinucleotide, or palmitoleic acid might contribute to the hippocampal injury following chronic SHS exposure. https://doi.org/10.1289/EHP8428

Airborne fungal spore monitoring: between analyst proficiency testing

This study presents the results of a Europe-wide training and Quality Control (QC) exercise carried out within the framework of the European Aerobiology Society’s QC Working Group. The main aim of this exercise was to examine the feasibility of carrying out a QC exercise for fungal spore monitoring in Europe, using a similar methodology to the one previously used for pollen. The QC survey was conducted in two parts: (1) Coordinators of national and regional aerobiological networks in Europe involved in the monitoring of atmospheric fungal spores were invited to complete a questionnaire survey related to their network and asked whether they were interested in taking part in an external inter-laboratory QC exercise; (2) Participating networks performed an inter-laboratory ring test with the same sample slide in order to determine the reproducibility of identifying and counting two fungal spore taxa (Alternaria and Epicoccum) in air samples collected by a Hirst-type volumetric spore trap. Participants were instructed to read five separate longitudinal transects in the “effective collecting area” of the slide. Reproducibility of analysis was determined following the method previously used in the European Aerobiology Society’s QC exercises for pollen. Thirty-two counters from 16 national or regional networks in Europe participated in the QC exercise. Coefficients of Variation (CV%) ranged from 23.0 to 22.5 when reading one transect and from 14.0 to 16.0 when reading five transects for Alternaria and Epicoccum, respectively. Considering a CV% of 30 as the limit for fungal spores, no significant differences were observed between the absolute errors from two, three, four and five transects. The only significant difference was between one and five transects. We recommend that fungal spore analysis should be carried out on about 5% of the slide (two transects in this study) because results were not significantly different to five transects.

Carbon emissions in the field of land use, land use change, and forestry in the Vietnam mainland

The biennial report of Vietnam includes updated information on the greenhouse gas emissions for the base years which are specified by the United Nations Framework Convention on Climate Change for reporting on greenhouse gas emissions by member nations of the Intergovernmental Panel on Climate Change. The estimation of greenhouse gas emissions in general and carbon emissions in particular in the field of land use, land use change, and forestry using advanced technology to provide the input data was recommended. Remote sensing technology with transparency, multi-time characteristics, and wide coverage is useful in this area. An experiment on carbon emission estimation was carried out based on land cover change over ten years between 2002 and 2012. The results obtained by remote sensing data classification for the land cover categories achieved a reliability of 68% for the year 2002 and 67% for the year 2012. Data in relation to the land cover change, soil zoning, and ecological/climate zoning in the Vietnamese mainland, through the process of integrating, processing, and synthesizing data, and using the reported activity data and carbon emission coefficients, were input into the Agriculture and Land Use Greenhouse Gas Inventory Software for carbon emission estimations based on the quality control and quality assurance work.