Main Indices Research Articles

Effectiveness of Physiotherapy Methods in Medical Rehabilitation of Patients with Shoulder and Scapular Pain Syndrome in a Sanatorium: a Randomized Clinical Study

INTRODUCTION. The high prevalence of shoulder pain syndrome (SPS) determines the relevance of the development of new comprehensive methods of rehabilitation of this category of patients.
 AIM. To evaluate the clinical effectiveness of shockwave therapy (SWT) and pulsed low-frequency electrostatic field (PLEF) in patients with SPS undergoing medical rehabilitation in a sanatorium-resort organization in comparison with traditional health resort treatment.
 MATERIALS AND METHODS. The comparative analysis of medical rehabilitation efficiency was carried out in 90 patients with SPS aged 31–68 years undergoing medical rehabilitation in the health resort complex “Vulan” — a clinical branch of National Medical Research Center for Rehabilitation and Balneology. All patients were divided into 3 groups of 30 persons each by the method of simple randomization. Group 1 patients (control) received traditional health resort treatment, including ozokeritotherapy, physical exercise therapy, electrotherapy with sinusoidal modulated currents and manual massage. Patients of the second group (comparison) received against the background of the above complex 3 SWT procedures on the shoulder joint once a week. Group 3 patients (main group) received, in addition to traditional treatments, 3 SWT and 8 field PLEF treatments administered every other day. The effectiveness of rehabilitation was evaluated according to the severity of pain syndrome (VAS scale), Swanson’s scale for the shoulder. Movement volume before and after rehabilitation was measured with an orthopedic angle gauge. Microcirculation state was assessed by laser Doppler flowmetry (LDF). Leukert scale was used to assess the state of well-being. The results of the study were assessed 18 days after the beginning of rehabil itation measures.
 RESULTS AND DISCUSSION. Patients who additionally received SWT and PLEF against the background of traditional health resort treatment noted a significant reduction in the severity of pain syndrome, while in the main group pain regression was noted earlier (on day 4–5), whereas in the comparison group the same results were obtained by the day 14th . In the control group, patients noted significant changes on the VAS scale only by the end of the rehabilitation course. On the Swanson scale, the most significant positive results were also obtained by the patients in the main group: the pain decreased on average 2.6-fold, the volume of active movements in the shoulder joint increased 2.7-fold, and activity in everyday life 1.9-fold. Statistical differences in the Swanson Scale scores with the comparison group were obtained with regard to pain syndrome and volume of active movements. When comparing with the control group, reliable differences were revealed in all Swanson’s scale indicators in both the main group and the comparison group. When studying the dynamics of microcirculation according to LDF data, it was noted that reliable changes in the main indices of the LDF-gram were revealed only in the groups that received innovative physical therapy interventions.
 CONCLUSION. Thus, the inclusion of modern physiotherapeutic techniques of SWT and PLEF into the program of health resort treatment of patients with SPS allows to increase significantly the efficiency of medical rehabilitation carried out in the sanatorium organization.

BUSINESS OPPORTUNITIES AND ARRANGEMENT OF LEGAL DOCUMENTS IN LICENSING TOWARDS ECONOMIC RECOVERY POST DISASTER

Village 18, Sarampad Cianjur Village, was one of the villages most affected by the earthquake that struck, resulting in damage and destruction of population documents and legal documents belonging to the victims. In order to motivate communities affected by disasters, technical assistance and guidance activities are held for the community in the form of: 1) Business and Legal Consultation Development, 2) Education regarding business recovery strategies 3). Counseling on the Population Administration Law and work copyright law on business licensing clusters. This activity involves lecturers and students with the Main Performance Index (IKU) output target, namely actively serving and making useful contributions to society outside the campus. The aim of the activity is firstly to provide education regarding business opportunities by utilizing local products & strategies for recovering businesses after a disaster; Second, Technical Guidance for processing various legal documents for permits and population documents that were lost or damaged after the disaster; third, counseling about land and business licensing. The results of community activities can form Joint Business Groups and savings and loan cooperatives in an effort to restore the economy; and second, legal documents, population administration and land certificates can be processed by the community, coordinated through the Head of RT 03 RW 10, in coordination with the Population and Civil Registry Service and the Land Office of the Cianjur Regency government.

Physicochemical characteristics of larval habitats and biodiversity of mosquitoes in one of the most important metropolises of southern Iran

The present study aimed to investigate the roles of the physicochemical characteristics of larval habitats in biodiversity and other bionomic factors of mosquitoes in Shiraz.The physical parameters of all habitats were recorded separately. The collected mosquito larvae were identified based on morphological characters. The water samples of larval habitats were analyzed for Biochemical Oxygen Demand (BOD, mg/L), Chemical Oxygen Demand (COD, mg/L), pH, alkalinity, turbidity, total hardness (mg/L), Electrical Conductivity (EC, μS/cm), Total Dissolved Solids (TDS, mg/L), Cl2 (mg/L), and water temperature (°C). In addition, three main indices were used for surveying biodiversity.A total of 1229 larvae were collected from April to September 2018 and May to August 2019. Seven medically important mosquito species were identified morphologically. Culex quinquefasciatus and Cx. laticinctus had the highest distribution and abundance. Ecological results showed that the richness and diversity of species were higher and more stable in natural sites than in manmade places. The optimum BOD, COD, alkalinity, TDS, EC, pH, and temperature of water for mosquitoes of the studied areas were 140 mg/L, 360 mg/L, 160 mg/L, 420 mg/L, 840 μS/cm, 8.3, and 24 °C, respectively. Most mosquitoes tended to live in manmade, temporary, and sunny larval habitats with turbid water.The results provided a better understanding of the biology and ecology of mosquitoes as the most important group of disease vectors to humans and animals. Hence, they could be used to apply some safer and more environmentally friendly methods for mosquito control.

Statistical Analysis of the Socio-Economic Situation in St. Petersburg in the Context of Crises

Purpose of the study. Statistical research of the socio-economic development issues of the region acquires special significance in crisis situations. Statistical methods make it possible to quantify the current situation, identify the impact of crisis phenomena and forecast the development of the region. In the analysis of socio-economic development, both economic characteristics (GDP, production and distribution) and direct indicators of the standard of living of the population (unemployment level, personal income and wages) are the key ones. The purpose of this paper is to statistically assess the impact of crisis situations on the socio-economic situation in St. Petersburg.Materials and methods. The information base for the study was official data from the Federal State Statistics Service. The paper uses methods of time series analysis, cluster analysis and analysis of structural changes.Results. Based on the results of the study, the main periods in the dynamics of the main socio-economic indexes were identified. Special attention is paid to studying the structure of GRP of St. Petersburg. Emphasis is placed on comparing the dynamics of regional indexes with data for the federal district and the Russian Federation as a whole. The features of the city’s development are considered using cluster analysis according to the current range of factors for different time periods. An assessment of the achievement of key planned indexes is given and a comprehensive index is proposed for assessing the development of the dynamics of the socio-economic development of the region. Particular attention is paid to analyzing the impact of crisis situations on the socio-economic status of the region and assessing the degree of their impact.Conclusion. Based on the results of the analysis, recommendations were given for the development of the region, which can be used in the implementation of socio-economic policy. Particular attention is paid to indexes of living standards.

Comparison of percutaneous vertebroplasty and conservative treatment for one level thoracolumbar osteoporotic compression fracture in a 3-year study

The efficacy of Mesh optimized versus standard percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures. Grid optimization (102 cases; 38 men, 64 women aged 67.3 ± 8.5) and traditional PVP groups (94 cases) were identified from 196 PVP patients treated from May 2016 to 2019. The optimal puncture site and angle forced bone cement into both groups before surgery. The main indexes were operation time, X-ray fluoroscopy times, bone cement injection volume, leakage, VAS, and injured vertebrae height. Preoperative general data were equivalent between groups (P > 0.05). All patients survived surgery without spinal cord injury, incision infection, pulmonary embolism, or death. The mesh optimization group had improved operation time (34.8 ± 6.5 min), fluoroscopy times (29.5 ± 5.5), bone cement injection volume (5.3 ± 2.1 ml), and bone cement permeability greater (3.9 percent; 4/98) than the standard PVP group (P < 0.05). Similarly, the grid optimization group had superior VAS scores (1.1 ± 0.6; 1.0 ± 0.3; and 0.9 ± 0.2) than the standard PVP group at 3 days, 3 months, and the last follow-up visit (P < 0.05). On day three after surgery, both had similar heights of injured vertebra's anterior and middle edges (P > 0.05). However, in the mesh optimization group, measurements improved to 1.8 ± 0.4 mm and (1.8 ± 0.3) mm by month three and to 1.7 ± 0.3 mm at last follow-up (P < 0.05). Mesh-optimized PVP with a mesh locator treats osteoporotic vertebral compression fractures more safely and effectively than regular PVP.

Impact of social isolation during COVID-19 on anthropometric data, quality of life, baseline physical activity and aortic pulse wave parameters in children and adolescents in two independent samples

BackgroundThe social restrictions resulting from the COVID-19 pandemic had a great impact on the routine of children and adolescents, with important consequences such as sleep, eating, and psychological/psychiatric disorders. Even though there are no studies on the subject, it is possible that these changes in habit and routine have also affected arterial stiffness (AS) in this population, which is an important predictor of cardiovascular risk. This study aimed to assess possible changes in AS, anthropometry, and quality of life (QoL) resulting from the COVID-19 pandemic in children and adolescents.MethodsA controlled observational cross-sectional study was performed with 193 children and adolescents aged 9 to 19 years, allocated into two groups: before the pandemic (BPG) and one year after the pandemic (APG), matched by age and sex. Cardiovascular parameters were measured non-invasively by brachial artery oscillometry with a portable device. The main AS indices evaluated were the augmentation index (AIx) and pulse wave velocity (PWV) derived from the aortic pulse wave. QoL was assessed using the Paediatric Quality of Life Inventory version 4.0 (PedsQL 4.0).ResultsRegarding QoL, the APG showed a worsening in emotional (p = 0.002) and school-related (p = 0.010) aspects. There was no statistically significant difference for most anthropometric parameters, except for the hip circumference, which was higher in the APG group (p < 0.001). The main predictor of AS in the paediatric population, AIx@75, was shown to be increased in the APG group (p < 0.001). Other cardiovascular parameters were also different, such as peripheral (p = 0.002) and central (p = 0.003) diastolic blood pressure, stroke volume (p = 0.010), and total vascular resistance (p = 0.002), which were shown to be decreased in the APG group, while the heart rate was increased (p < 0.001).ConclusionsOur results show that routine changes resulting from the period of social isolation increased cardiovascular risk in children and adolescents, evident by the increase in AIx@75, which is considered to be an important marker of cardiovascular risk in the paediatric population.

Cognitive Profile Discrepancies among Typical University Students and Those with Dyslexia and Mixed-Type Learning Disorder.

Previous studies have identified areas of cognitive weakness in children diagnosed with Specific Learning Disorder (SLD), in the areas of working memory and processing speed in particular. In adulthood, this literature is still scant, and no studies have compared the cognitive profile of university students with dyslexia (DD) with that of students with Mixed-type SLD. Thus, in this study, the WAIS-IV was used to examine the cognitive functioning of three groups of university students: students with DD, with Mixed-type SLD, and typical students. Statistical analyses were performed to examine differences in WAIS-IV FSIQ, main, and additional indexes and subtests. The results showed strengths in perceptual reasoning and good verbal comprehension abilities in both the DD and Mixed-type SLD group, with weaknesses in working memory and processing speed, leading to a pattern of a better General Ability Index (GAI) than Cognitive Proficiency Index (CPI) in both clinical groups. Thus, discrepancies between GAI and CPI, well documented in children with SLD, still manifest in adulthood in university students. Our findings also revealed worse cognitive performance in university students with mixed learning disorder relative to students with only a reading deficit. The cognitive features and distinctive subtest profiles that emerged should guide the assessment and the definitions of intervention programs, special educational needs, and strategies of compensation.

Investigate the role of neutrophil extracellular traps in immune checkpoint inhibitor-associated myocarditis with programmed death protein-1 inhibitors involvement

Objective: To investigate the role of neutrophil extracellular traps (NETs) in immune checkpoint inhibitor-associated myocarditis (ICIAM) with programmed death protein-1 (PD-1) inhibitors involvement, and to explore the therapeutic potential of targeting NETs in the treatment of ICIAM. Methods: Thirty 6-week-old male BALB/c mice were randomly divided into control group (n=10), myocarditis group (n=10), and treatment group (n=10). Apart from the control group, each mouse was subcutaneously injected with 100 μl of complete Freund's adjuvant containing 250 μg of mouse cardiac troponin I peptide on the 1st and 7th day. Starting on the 8th day, PD-1 inhibitor (15 μg/per mouse) was intraperitoneally injected every other day for a total of 5 times. Since 1 day before the beginning of PD-1+TnI injection, the treatment group was injected with PF-1355 (50 mg·kg-1·d-1) for 16 consecutive days. The mice's general state was observed during the whole process. Real-time fluorescence quantitative PCR (RTFQ-PCR) was carried out to evaluate the transcriptional regulation of neutrophil related chemokines, NETs, pyronecrosis related factors and proinflammatory cytokines. Immunohistochemistry, immunofluorescence and western blot were applied to determine the changes of pyrosis related molecules. Echocardiography showed the differences of main cardiac indexes while cardiac pathology compared the degree of inflammatory infiltration in 3 gruops. Results: The immunofluorescence intensity of myocardial NETs in the myocarditis group was significantly increased compared to the control group mice (2.49±0.08 and 0.99±0.26, P<0.001). The protein expression levels of pyroptosis-related NLRP3, cleaved-Caspase 1, Caspase 1, cleaved-GSDMD, GSDMD, IL-1β and IL-18 in myocardial tissue of the model group were higher than those of the control group (all P<0.05). After treatment with PF-1355, compared to the myocarditis group, the left ventricular ejection fraction (LVEF) (73.58%±5.31% and 58.12%±3.19%, P<0.001) and left ventricular fraction shortening (LVFS) (39.78%±4.31% and 33.89%±2.19%, P<0.001) increased. H-E staining showed a reduction in inflammatory infiltration area in the treatment group compared to the myocarditis group (30.12%±3.57% and 14.92%±2.46%, P<0.001). The immunofluorescence intensity of NETs decreased in the treatment group compared to the myocarditis group (2.52±0.04 and 1.03±0.05, P<0.001). The levels of NLRP3 and other pyroptosis-related molecules were downregulated in the treatment group compared to the myocarditis group (all P<0.05). Conclusions: NETs lead to myocardial cell pyroptosis by activating the NLRP3 inflammasome in PD-1 inhibitor-associated myocarditis. The specific MPO inhibitor PF-1355 shows a therapeutic potential by regulating the formation of NETs, decreasing NLRP3 level and relieving myocardial pyroptosis, thus reducing myocardial damage.

Frequency Stability Enhancement of Microgrid Using Optimization Techniques-Based Adaptive Virtual Inertia Control

In recent years, a sharp increase in integration of renewable energy sources (RESs) in power system network has been observed. High penetration of RES interfaced with power electronics converters-inverters with reduced or no inherent inertia compromises modern power system’s overall stability. Due to low inertia, voltage and frequency deviations far off the allowable threshold occur. To overcome this challenge, an adaptive inertia control strategy based on optimization technique is proposed. The improved particle swarm optimization (PSO) and genetic algorithm (GA) optimization techniques-based PID controller has been used to generate the appropriate virtual inertia coefficient for effective emulation of inertia in the presence of energy storage system. The conventional PSO suffers local optima stagnation, resulting in premature convergence during searching process in order to achieve global and local position. To address this issue, the velocity update equation was modified on inertia weight (w) using an additional exponential term with linear decreasing inertia weight PSO (LDIW-PSO). In this paper, exponential power is taken strategically instead of squaring it in order to reduce the number of iterations for faster convergence. Finally, a microgrid based on wind and solar energy is simulated using MATLAB/Simulink where three cases, 2% disturbance, 3% disturbance, and 4% disturbance, have been considered. Here, the evaluation of proposed system is carried out based on four main performance indices (ITAE, IAE, ISE, and ITSE). Furthermore, validation was done through hardware prototype to get experimental results in real time. The results from MATLAB simulation and experimental setup are in sync.

Effect of Local Floor Heating System on Occupants’ Thermal Comfort and Energy Consumption Using Computational Fluid Dynamics (CFD)

In this article, the influence of splitting a local underfloor air distribution system (UFAD) on indoor thermal comfort for three occupants was studied numerically. A validated computational fluid dynamics (CFD) model was employed in this investigation. The proposed heating system was evaluated and analyzed for different values of air temperature and supply velocity. Providing suitable thermal comfort and saving energy are considered the main evaluation indexes for this study. Three cases, cases 2, 3, and 4, of the proposed local UFAD system were compared with a traditional heating system case, case 1. The supplying air velocity and air temperature in the reference case were 0.5 m/s and 29 °C, while in cases 2, 3, and 4, they were 0.4 m/s and 29 °C, 28 °C, and 27 °C, respectively. The results show that acceptable indoor human thermal comfort and energy demand reduction were achieved by using the splitting UFAD concept.

Dapaglifozin in adults with a systemic right ventricle:initial results from the DAPA-SERVE trial

Abstract Background Sodium-glucose Cotransporter-2(SGLT2) inhibitors are currently recommended as first line therapy for all patients with heart failure with reduced ejection fraction (HFrEF).Adults with a systemic right ventricle (sRV) may develop progressive systolic dysfunction during follow-up. Optimal medical therapy for HFrEF remains still to be determined in this complex population. Purpose We aimed to assess safety and evaluate potential clinical benefit of dapagliflozin in patients with a sRV compared to standard medical treatment for HF. Methods Inclusion criteria were:age ≥ 18 years; transposition of the great arteries (TGA) following Senning/Mustard repair or congenitally corrected TGA, sRV EF ≤ 40%, already on optimized medical therapy including sacubitril/valsartan for at least 3 months. Exclusion criteria were: systolic blood pressure (SBP) &amp;lt;90 mmHg, glomerular filtration rate (GFR)&amp;lt;30ml/min and univentricular physiology. All eligible patients attending our tertiary center for adult congenital heart disease were randomly assigned to the treatment or control group. Patients in the treatment arm were prescribed 10 mg dapagliflozin o.d. on top of their medical therapy, while control group continued standard therapy. Patients were scheduled for a structured follow-up including clinical evaluation, blood test, echocardiography, and 6 minute-walking at 6 months from study inclusion for both groups. Results Fifty patients (41±11 years, 54% male, 64% TGA) met the inclusion criteria: 25(50%) were started on 10 mg dapagliflozin. There was no significant difference in terms of age (p=0.4), sex(p=0.1), anatomy(p=0.2) and baseline sRV EF (p=0.2). Up to February 2023, 14 patients in the treatment group and 13 controls completed the 6-month follow-up. Clinical and echocardiographic findings at baseline and at 6-month in the treatment group are summarized in Table1: dapagliflozin was well tolerated and no major adverse events were reported. Treatment did not impact on the systolic blood pressure and renal function. However a significant improvement in the sRV freewall global longitudinal strain(GLS) was found (-15.8±3 Vs -18.3±3; p=0.03). Differences in main echocardiographic indices of sRV systolic function between baseline and follow-up in the two arms are shown in Table2: treatment resulted in significant positive changes of sRV FAC, GLS, and free wall GLS compared to the group on standard therapy. Conclusions Initial results from the ongoing single-centre DAPA-SERVE trial provided reassuring data on the safety profile of dapagliflozin in patients with a sRV. Furthermore, significant improvement of echocardiographic indices of sRV function in patients on dapagliflozin compared to those on standard medical therapy was demonstrated at 6-month. Longer follow-up is warranted to determine the clinical impact of those positive changes and to shed light on the potential benefit of SGLT2 inhibitors use on top of standard therapy in this complex population.

Durability research of high performance concrete and its application in engineering

With the development of modern science and technology, the application of concrete is more and more extensive, and the performance of traditional concrete has been difficult to meet the high requirements of engineering. All countries in the world are committed to seeking concrete with good construction performance, good durability, long service life and other advantages. Durability is the main design index of high performance concrete (HPC), so this paper studies and analyzes the main factors affecting the durability of HPC and the technical ways to improve the durability of concrete. The main internal factors affecting the durability of HPC are high water consumption and unstable hydrate in cement. External factors are various environmental conditions and protective measures of concrete structures. The technical ways to improve the durability of concrete mainly include reasonable structural design, reasonable concrete mix ratio, adding mineral admixtures and admixtures, reliable construction technology and regular maintenance. In the future, high-performance concrete should develop in the direction of economic green, and try to be environmentally friendly and recyclable while meeting the strength needs.

Effect of high flow nasal catheter oxygen to prevent hypoxemia in endoscopic retrograde cholangiopancreatography surgery in aged

Objective: To explore the effect of high-flow nasal catheter oxygen inhalation in preventing hypoxemia during endoscopic retrograde cholangiopancreatography (ERCP) surgery in elderly patients. Methods: From September 2021 to September 2022, 116 elderly patients (aged ≥ 70 years) who underwent elective ERCP in the Northern Theater General Hospital were prospectively selected, then divided into general nasal catheter oxygen inhalation group [group C, 31 males and 27 females, aged (79.8±6.4) years] and high-flow nasal catheter oxygen inhalation group [group H, 33 males and 25 females, aged (81.4±6.7) years], with 58 patients in each group. All patients were monitored for anesthesia by target-controlled infusion of propofol and remifentanil. The main outcome index was the incidence of intraoperative subclinical hypoxemia (90% ≤ SpO2 < 95%, duration >5 s), hypoxemia (75% < SpO2 < 90%, 5 s < duration ≤ 60 s) and severe hypoxemia (SpO2 < 75% or SpO2 < 90%, duration > 60 s). Secondary observation measures were SpO2 from T0 to T5 (T0, before anesthesia induction; T1, immediately after anesthesia induction; T2, endoscopic introduction; T3, duodenal papula intubation; T4, endoscopic withdrawal; T5, postoperative awakening), the arterial oxygen partial pressure (PaO2), carbon dioxide partial pressure (PaCO2) and pH at T0, 15 min after the induction and T5. Results: The incidence of intraoperative subclinical hypoxemia in group C and group H was 12.0% (7/58) and 3.4% (2/58) respectively, which showed no significant statistical difference (P=0.165) from each other. The incidence of intraoperative hypoxemia in group H was 8.6% (5/58), which was significantly lower than 31.0% (18/58) of group C (P=0.003). Neither group had intraoperative severe hypoxemia. SpO2 of group H were (98.2±0.9)%, (98.2±0.9)%, (97.8±1.7)% and (97.7±1.7)% at T1, T2, T3, T4, which were higher than (96.8±2.1)%, (96.4±3.0)%, (96.1±2.9)% and (96.4±3.4)% in group C (all P<0.05). PaO2 at 15 min after induction in group H was (240.5±46.7) mmHg (1 mmHg=0.133 kPa), which was higher than that of group C (170.6±33.4) mmHg (P<0.001). There was no statistically significant difference in pH and PaCO2 between the two groups of patients at each timepoint. Conclusion: High flow nasal catheter oxygen can effectively reduce the incidence of hypoxemia in ERCP in elderly patients.

Coaxiality prediction for aeroengines precision assembly based on geometric distribution error model and point cloud deep learning

Assembly accuracy of aeroengines influences operation performance and service life. The coaxiality of the aeroengine is the main index of assembly accuracy and is also a core index to represent assembly quality. However, direct measurement of coaxiality is a difficult technical problem due to the sealed structure of the aeroengine casing system. A coaxiality prediction method is proposed to obtain coaxiality and assist assembly by geometric distribution error modeling and point cloud deep learning. The prediction process consists of three steps. In the beginning, the geometric distribution error model is established to construct the accurate dense point cloud of aeroengine part surfaces by the non-uniform rational B-splines (NURBS) method based on the coordinate measuring machine collecting information. Then, the mapping between the dense point cloud and coaxiality is established to obtain an assembly dataset by the virtual assembly. Finally, the dataset is fed to a new point cloud deep learning backbone, Self-channel cross attention point network, and realizes end-to-end coaxiality prediction based on the aeroengine surface point cloud. The geometric distribution error model is tested on the aeroengine simulated parts with 0.001 mm accuracy. The prediction method is verified on the aeroengine simulated parts and compared with other point cloud deep learning baselines. The method proposed in this paper realizes 93.17% prediction accuracy with 0.01 mm coaxiality precision which is a high performance and meets the requirements of industrial measurement. This paper provides an effective coaxiality prediction model for the aeroengine casing system, to improve the accuracy and efficiency of the aeroengine assembly.

Monitoring and evaluation of disaster risk caused by linkage failure and instability of residual coal pillar and rock strata in multi-coal seam mining

Comprehensive research methods such as literature research, theoretical analysis, numerical simulations and field monitoring have been used to analyze the disasters and characteristics caused by the linkage failure and instability of the residual coal pillars-rock strata in multi-seam mining. The effective monitoring area and monitoring design method of linkage instability of residual coal pillar-rock strata in multi-seam mining have been identified. The evaluation index and the risk assessment method of disaster risk have been established and the project cases have been applied and validated. The results show that: ①The coal pillar will not only cause disaster in single-seam mining, but also more easily cause disaster in multi-seam mining. The instability of coal pillars can cause not only dynamical disasters such as rock falls and mine earthquakes, but also cause surface subsidence and other disasters. ②When monitoring the linkage instability of residual coal pillar-rock strata, it is not only necessary to consider the monitoring of the apply load body (key block), the transition body (residual coal pillar) and the carrier body (interlayer rock and working face), but also to strengthen the monitoring of the fracture development height (linkage body). ③According to the principles of objectivity, easy access and quantification, combined with investigation, analysis, and production and geological characteristics of this mining area, the main evaluation indexes of the degree of disaster caused by linkage instability of residual coal pillar-rock strata are determined as: microseismic energy, residual coal pillar damage degree, fracture development height. And the evaluation index classification table was also given. ④According to the measured value of the evaluation index, the fuzzy comprehensive evaluation method was used to calculate the disaster risk degree in the studied mine belongs to class III, that is, medium risk level. The corresponding pressure relief technology was adopted on site, which achieved a good control effect, and also verified the accuracy and effectiveness of the risk evaluation results.

Multi-pedestrian Tracking Method Fusing Two-stage Matching

Multi-pedestrian tracking is one of the hot topics in computer vision. For an intelligent mobile robot, multi-pedestrian tracking from a first-person perspective can provide information for navigating through a crowd and ensure safety. Most of the existing methods cannot deal with occlusion and trajectory overlap well. In this paper, a multi-pedestrian tracking method fusing two-stage matching is proposed. Firstly, the detection and the corresponding feature values of the pedestrians are obtained by a multi-task learning network based on CenterNet. Then the detected pedestrians are matched with feature values by greedy strategy. When dealing with the reappearance of pedestrians caused by occlusion or trajectory overlap, the sample database is established to update the samples in real time. The color histogram and HOG feature are calculated for each sample. When the pedestrian disappears, the direction of disappearance and the last position is recorded for the selection of trajectory. Finally, the KM algorithm is used for cross-frame matching. Our method is compared with some recent methods on MOT data sets. The result shows that our method has a significant improvement in the main evaluation index MOTA.

A systematic review on wind load due to downbursts

The importance of classifying statistical data from wind events has been highlighted in wind engineering once profiles for downburst winds have critical differences from the SBL broadly used in designing codes worldwide. To assess the scientific literature in the last ten years, aiming to understand which structures the downburst action is more relevant, how advanced the downburst researches are compared with SBL, and to identify the gaps to be studied, bibliometric analyses and a systematic review. A Bibliographic portfolio of 210 articles was selected. From that, it was possible to identify the main indexes of scientific production, such as the temporal evolution of publications, the contributing authors, countries, and periodicals. This study shows that downbursts have been a highlight in the wind engineering subject in the last ten years, and challenges and needs are listed.

Assessment of natural radioactivity and radon release potential of silurian black shales

Many countries are developing a radon action plan to provide decision-makers with a reliable tool for reducing the harmful effects of radon exposure in dwellings and among the general public and, accordingly, to implement land development strategies. Mapping the geogenic radon release in different geological environments could assist in delineating areas that require priority monitoring and regulation, as well as applying radon reduction techniques in newly constructed buildings. In this paper, the activity concentration of 238U, 226Ra, 232Th and 40K and the exhalation rate of 222Rn have been estimated for the Silurian black shales of Villasalto, a district in the south-eastern Sardinia (Italy). The radioactivity of 226Ra, 232Th and 40K radionuclides was found relatively high (256.32 ± 87.00 Bq.kg−1), low (44.16 ± 9.47 Bq.kg−1) and moderate to high (856.28 ± 392.41 Bq.kg−1) respectively. The radon emanation coefficient (E) and the radon production rate (PRn) have been calculated based on the analysis of the radon growth model inside a sealed chamber. E was found to correlate well with the activity concentration of 226Ra, as well as with the grain size of the soil/rock samples under investigation. PRn was relatively high, ranging from 212.54 to 524.27 Bq.m−3.h−1. Furthermore, the mean value of the main radiation hazard indexes (i.e., the radium equivalent activity, the outdoor gamma-ray dose rate and the annual effective dose) were found to be 299.07 ± 138.62 Bq.kg−1, 169.97 ± 75.58 nGy h−1 and 0.21 ± 0.09 mSv.y−1 respectively.

Estimating diabetes risk using Nave Bayes classifiers

Diabetes is now a common disease for modern people. Diabetes will cause some serious symptoms. Diabetes patients will face a painful life, high cure cost, and even death. So, it is necessary to correctly diagnose diabetes and analyze the factors that mainly cause diabetes to prevent the happen of diabetes. This essay mainly focuses on training the computer to help the doctor to train the computer. Three Naive Bayes classifications will be used to train the computer to do the prediction, including the Gaussian Nave Bayes, Bernoulli Nave Bayes, and Multinomial Nave Bayes. To compare each methods result, accuracy will be the main index to measure whether a method is good enough to put into use. Not only the accuracy, classification report, and confusion matrix also assist to measure the prediction. Finally, the Gaussian Nave Bayes has the highest accuracy and when combined with the confusion matrix and the classification report, the Gaussian Nave Bayes has a huge advantage over the other two models. The accuracy of these models still does not satisfy medical demand. Some deep learning and high-level model are expected to optimize this project.

Frank's Sign and Cardiovascular Risk: An Observational Descriptive Study

PurposeThis study was undertaken to analyze the relationship between the diagonal earlobe crease and the main indices of cardiovascular risk, considering the crease's anatomical variations. MethodsThe study group consisted of 1050 adults residing in Spain. Participants underwent the following determinations: age, sex, body mass index, smoking habit, blood pressure, glycemia, glycated hemoglobin, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, and cardiovascular events. Cardiovascular risk was calculated applying the Framingham-Anderson equation, the Systematic Coronary Risk Evaluation equation, and the Atherosclerotic Cardiovascular Disease Risk Score calculator. Both earlobes were examined, recording diagonal earlobe crease presence, length and depth, and presence of accessory creases. Results were analyzed by using chi-square test, Student's t test, analysis of variance, and Mann-Whitney or Kruskal-Wallis tests. To extract the functions of cardiovascular risk, a script in R was created (https://cran.r-project.org/). ResultsThe estimated cardiovascular mortality risk was significantly higher in individuals who presented diagonal earlobe crease (P < .001). The number of individuals with moderate, high, or very high cardiovascular risk increased significantly as the presence of the crease increased (23.8% had no crease, 35.6% had unilateral creases, and 58% had bilateral creases; P < .001). The mean cardiovascular risk estimated was significantly higher for individuals with longest and deepest diagonal earlobe crease (P < .001 and P < .001, respectively), and with accessory creases (P < .001). ConclusionsThe diagonal earlobe crease is independently associated with higher cardiovascular risk scores, especially when the crease is complete, bilateral, deep, and has accessory creases.