Degree Of Penetration Research Articles

An improvement in clash detection process by prioritizing relevance clashes using fuzzy-AHP methods

Design coordination and clash detection are the most common and appreciated applications of three-dimensional modeling (3D modeling). In some projects, millions of clashes are detected including a large number of irrelevant clashes. The purpose of this research is to determine the priority of resolving clashes before the construction phase. In this research, the results of Autodesk Navisworks have been used to improve the process of clash detection. Also, this study attempts to use the fuzzy-AHP for weighting criteria and then, by presenting a relationship, to provide a basis to prioritizing clashes for their resolution and, finally, for identifying irrelevant clashes. This method has been tested on a real project, and the comparison of the expert opinions and the proposed method showed that applying the proposed relationship can identify important and irrelevant clashes. Practical application If clashes are not carefully detected in the design stage, project management components face a serious challenge. In this study, using the weight of clash elements and the degree of penetration of clash elements into each other, a logical and practical relationship is presented that improves the process of clash detection.

Electrical Resistivity Measurements for Nondestructive Evaluation of Chloride-Induced Deterioration of Reinforced Concrete-A Review.

The objective of this study is to review, evaluate, and compare the existing research and practices on electrical resistivity as a nondestructive technique in evaluating chloride-induced deterioration of reinforced concrete elements in buildings and civil infrastructure systems. First, this paper summarizes the different measurement techniques for gathering electrical resistivity (ER) values on concrete. Second, comparison analyses are performed to review the correlation of ER to different parameters representing corrosive environment and activity of steel corrosion in concrete, such as degree of water saturation, chloride penetration and diffusivity, and corrosion rate. In addition, this research enumerates and individually discusses the different environmental and interference factors that are not related to the electrochemical process of steel corrosion in concrete but directly affect the ER measurements, including temperature, the presence of steel reinforcement, cracks and delamination defects, specimen geometry, and concrete composition. Lastly and most importantly, discussions are made to determine the current gap of knowledge, to improve the utilization of this method in field and laboratory measurements, and future research.

Investigation and Comparison of Metal Nanoparticles on Dose Enhancement Effect in Radiotherapy Using Monte Carlo Simulation Method

Introduction: The main goal of radiation therapy is destroying the tumor so that the surrounded healthy tissues have received the least amount of radiation at the same time. In recent years, the use of nanoparticles has received much attention due to the increasing effects they can have on the deposited dose into the cancer cells. The aim of this study was to investigate the effects of nanoparticles in improving radiotherapy conditions by Monte Carlo simulation.
 Methods: In this study, the geometry that was considered as the tissue of the human body was designed by Monte Carlo simulation method and distributed nanoparticles such as gold, silver, platinum, etc. into the geometry. Then the source was placed in a coordinate of this geometry and by increasing the photons to this geometry, the Dose Enhancement Factor was calculated. The simulation was performed using MCNP Code.
 Results: The results showed that platinum nanoparticles have a better performance in increasing the dose rate than other nanoparticles so that for photons with energy of 40 kV, this increase was approximately 2.5 times, also increasing the dose was directly related to increasing the concentration of nanoparticles.
 Conclusion: Considering the sufficient biocompatibility and the degree of penetration in the target, the use of nanoparticles in radiotherapy is one of the most promising methods to increase the dose delivered to the target. Given that the cell model and the results presented in this work lead to a better understanding of the effects of the distribution of platinum nanoparticles in increasing the dose, these calculations are valuable.

СЕМІОТИКО-КОМПОЗИЦІЙНІ АСПЕКТИ ФОРМУВАННЯ ТВОРІВ СТАНКОВОГО ЖИВОПИСУ КИТАЮ: ЗАГАЛЬНОТЕОРЕТИЧНИЙ АНАЛІЗ

The scientific article is devoted to the complex analysis of semiotic-compositional aspects of formation of works of easel painting of China. It established that taking into account the holistic and fundamental changes that took place in the spiritual life of society in the late XX –early XXI century and due to the transformations taking place in the fine arts of China, it is obvious that profound changes have affected the methodology of philosophical knowledge and the foundations of artistic creativity. In art, the practice of artistic creativity and the accompanying philosophical reflection always go hand in hand, fully determining each other. In turn, attention to some specific aspects of the formation of the compositional construction of a work of art is not only able to promote practice, but can deepen the degree of penetration into all aspects of the topic under consideration. Emphasis is placed on the fact that extrapolating such a method to the study of the phenomena of compositional construction, we can afford to trace the relationship between individual artistic styles and their relationship to the goals and objectives of composition. This allows us to distinguish two aspects of the study: the attitude to the composition, its goals, objectives, methods and techniques in the context of the analyzed individual artistic styles; attitude to the composition, its goals, objectives, methods and techniques, as a communicative model of “open” type, in which the message changes as codes change, and the use of certain codes is dictated by ideology, features of historical development, translational movement of semiosis.

A study on the rheological properties and modification mechanism of graphene oxide/polyurethane/SBS-modified asphalt.

To study the effect of graphene oxide (GO) on thermoplastic polyurethane (TPU)/styrene–butadiene–styrene (SBS)-modified asphalt and reveal the modification mechanism, GO/TPU/SBS-modified asphalt was prepared by high-speed shearing Hongjuan et al. (2020). The physical properties of the modified asphalt were measured via a basic index test, and the dynamic rheological behavior of the modified asphalt was characterized by a dynamic shear rheometer (DSR), a bending beam rheometer (BBR), and other technical means. Moreover, double-beam UV-visible (UV-Vis) spectrophotometry and Fourier-transform infrared spectroscopy (FTIR) were conducted to determine the mechanism of asphalt modification from the microscopic perspective. The experimental results reveal that the GO content can improve the basic mechanical properties, high-temperature stability, and low-temperature cracking resistance of TPU/SBS-modified asphalt. When the GO content is 0.5%, the ductility and softening point of the modified asphalt are found to be significantly increased, and the degree of penetration is slightly decreased. Moreover, with the increase of the GO content, the rutting resistance and crack resistance of the asphalt materials are improved. Via the joint action of physical modification and chemical reaction, GO can form a stable structure with asphalt molecules, enhance the stability between asphalt molecules, and increase the colloidal content of macromolecules in the modified asphalt components.

Relationship Between the Mobility of Aggregates and Fluid Penetration Depth Across a Range of Fractal Dimensions Using Stokesian Dynamics.

The hydrodynamic behavior of fractal aggregates plays an important role in various applications in industry and the environment, and has been a topic of interest over the past several decades. Despite this, crucial aspects such as the relationship of the mobility radius, Rm, with respect to the fractal dimension, df, and the fluid penetration depth, δ, have largely remained unexplored. Herein, we examine these aspects across a wide range of df's through a Stokesian dynamics approach. It takes into account all orders of monomer-monomer interactions to construct the resistance matrix for the entire cluster, which is assumed to be rigid. Statistical fractals created using algorithms such as diffusion limited aggregation (DLA), cluster-cluster aggregation (CCA), tunable Monte Carlo algorithm, and a deterministic Vicsek fractal, with df varying from 1.76 to 3, and the number of monomers ranging from 20 to 10 240 are considered. While confirming the expected asymptotic cluster-size independence of the hydrodynamic ratio, β = Rm/Rg (where Rg is the radius of gyration of the cluster), this study reveals a monotonically increasing trend for β with increasing df. The decay of the fluid velocity within the aggregate is quantified via the concept of penetration depth (δ). Analysis shows that the dimensionless penetration depth (δ* = δ/Rg) approaches asymptotic constancy with respect to cluster size in contrast to a weak dependency of the form δ* ∼ (Rg/a)-(df-1)/2, predicted by the mean-field theory (a being the monomer radius). Furthermore, the penetration depth is found to decrease rapidly, in an exponential manner, with increasing β. This establishes a quantitative relationship between the resistance experienced by the cluster and the degree of penetration of fluid into it. The implications of these results are further discussed.

Supraparticles with a Mechanically Triggerable Color‐Change‐Effect to Equip Coatings with the Ability to Report Damage

Small scratches and abrasion cause damage to packaging coatings. Albeit often invisible to the human eye, such small defects in the coating may ultimately have a strong negative impact on the whole system. For instance, gases may penetrate the coating and consequently the package barrier, thus leading to the degradation of sensitive goods. Herein, the indicators of mechanical damage in the form of particles are reported, which can readily be integrated into coatings. Shear stress-induced damage is indicated by the particles via a color change. The particles are designed as core-shell supraparticles. The supraparticle core is based on rhodamine B dye-doped silica nanoparticles, whereas the shell is made of alumina nanoparticles. The alumina surface is functionalized with a monolayer of a perylene dye. The resulting core-shell supraparticle system thus contains two colors, one in the core and one in the shell part of the architecture. Mechanical damage of this structure exposes the core from the shell, resulting in a color change. With particles integrated into a coating lacquer, mechanical damage of a coating can be monitored via a color change and even be related to the degree of oxygen penetration in a damaged coating.

Middle Meningeal Artery Embolization for Chronic Subdural Hematoma Using N-Butyl Cyanoacrylate With D5W Push Technique.

Middle meningeal artery (MMA) embolization has been recognized as a promising treatment for patients with subdural hematoma (SDH). To present the technical feasibility and efficacy of n-butyl cyanoacrylate (n-BCA) embolization in the largest consecutive cohort to date. We retrospectively reviewed our consecutive cases of recurrent SDH treated with MMA embolization using diluted n-BCA with the "sugar rush" technique. In brief, a 2.1-Fr microcatheter was used to selectively catheterize the frontal and posterior branches of the MMA. 5% dextrose in water (D5W) was injected through an intermediate catheter while injecting n-BCA through the microcatheter. Complete obliteration of MMA and lack of SDH recurrence in a 3-6 months follow-up computed tomography scan were defined as efficacy outcomes. Cranial nerve palsy, vision loss, transient neurological deficit, and stroke were defined as safety outcomes. A total of 61 patients were identified with a mean (±standard deviation) age of 62.5 ± 9 years. In 6 patients (10%), coil embolization of the origin of the frontal or posterior branch was performed because super-selective catheterization of the branch was unsuccessful because of tortuous anatomy. Complete obliteration of frontal and posterior branches was achieved in 100% of the cases. Recurrent SDH was seen in 3 patients (5%). No incidence of cranial nerve palsy, vision loss, or stroke occurred. One patient suffered a transient neurological deficit. MMA embolization using diluted n-BCA with concomitant D5W injection is associated with a high degree of distal penetration and complete branch occlusion and minimal risk of cranial nerve palsy or other thromboembolic complications.

Impact of grid-tied photovoltaic systems on voltage stability of tunisian distribution networks using dynamic reactive power control

Analysis of voltage stability of transmission network with high photovoltaic (PV) integration is a challenging problem because of the stochastic generation of a solar system. Stabilization of the output power is an important criterion for determining the degree of penetration of PV in active distribution networks, considering loading capability. This article describes the effective voltage regulation strategy for the transmission system using the STATCOM module to resolve the drop and the effect aspects on the voltage stability in the transmission network. This paper analyzes also the influence of the STATCOM control system on preventing the combination of injection voltage STATCOM with harmonics from achieving pure voltage compensation. The proposed test system under analysis is the 53-Bus Tunisian distribution power network integrating 12 MW solar PV plant. Simulation results are added to demonstrate the efficiency of the proposed control technique for enhancing the power system quality based on the Tunisian grid code. Investigation of voltage stability shows that the dynamic behavior of the voltage depends strongly on the short circuit capacity of the power network at the point of PVs integration.

Yttrium Trifluoride as a Marker of Infiltration Rate of Decalcified Root Cementum: An In Vitro Study.

Research related to the development of a dental infiltrant for minimally invasive treatment of initial caries of hard dental tissues is presented. The formulation of the developed infiltrant material includes typical methacrylate monomers used in dentistry, an author’s adhesion monomer containing metronidazole, a photoinitiating system and yttrium trifluoride (YF3). The main objective of the study was to evaluate penetration into decalcified root cementum using scanning electron microscope of an experimental preparation with the characteristics of a dental infiltrant compared to a commercial preparation with the addition of YF3 as a contrast agent. Microscopic observations showed that YF3 particles virtually did not penetrate deep into the root cementum—this was mainly due to the particle size of YF3. Observations of cementum and root dentin tissue infiltration: resin tissue infiltration was visible to a depth of about 80 to 120 μm without the use of a tracer, which, due to agglomeration and particle size, remained on the cementum surface or in the resin used for inlaying. There were no differences between the degree of penetration of an experimental preparation with the characteristics of a dental infiltrant, as compared to a commercial preparation.

Biotreatments Using Microbial Mixed Cultures with Crude Glycerol and Waste Pinewood as Carbon Sources: Influence of Application on the Durability of Recycled Concrete.

Two eco-friendly healing bioproducts generated from microbial mixed cultures (MMC) for the production of polyhydroxyalkanoates (PHA) were used as surface treatments, with two residual materials used as the substrates, namely crude glycerol and pinewood bio-oil. Their ability to improve the durability of concrete samples containing recycled aggregates was assessed. To determine this protective capacity, 180 samples were analyzed using different tests, such as water penetration under pressure, capillary absorption, freeze–thaw and water droplet absorption test. Three types of conditions were used: outdoor–indoor exposure, re-application of biopolymers and application in vertical exposure conditions. The results showed reductions of up to 50% in the water penetration test and a delay in the water droplet absorption test of up to 150 times relative to the reference. The surface application of these bioproducts significantly reduced the degree of water penetration in recycled concrete, increasing its useful lifespan and proving to be a promising treatment for protecting concrete surfaces.

Research on influencing factors of fatigue performance of cruciform welded joints on offshore platforms

In this study, the fatigue life of load-carrying cruciform welded joints under various plate thicknesses and degrees of penetration was performed. The fatigue assessment results showed a significant “thickness effect.” The fatigue limit of the 25 mm-thick sample was 13.4% lower than that of the 16 mm-thick fatigue sample. Essentially, the fatigue life of the weld toe does not change with the degree of penetration. Plate thickness is the key factor affecting the fatigue life. The thickness effect is determined by both the stress gradient along the plate thickness and the degree of surface stress concentration. The correction result based on the effective notch stress approach is more accurate than the thickness correction formula in the ABS standard, which underestimates the thickness effect of load-carrying cruciform welded joints and may lead to danger. The penetration ratio a/t affects the fatigue failure position of load-carrying cruciform welded joints. The fatigue design of load-carrying cruciform welded joints can be performed by appropriately increasing the degree of penetration while achieving the damage at the weld toe.

Morphological Study of Rouviere's Sulcus

Background: Rouviere's sulcus (RS) is a cleft, on the inferior surface of the liver, extending from the caudate process to the right lobe for a variable distance. Cystic duct and artery lie anterosuperior while the common bile duct lies anterior to this sulcus, making it an important landmark in laparoscopic cholecystectomy. Being situated anterior to segment I of liver and having the right posterior portal pedicle as its frequent content, it is an important guide in right segmental liver resection. This study intends to study the anatomy of the RS. Methodology: The present study was done by analyzing 60 formalin-fixed adult livers, for the presence/absence of RS, its morphology and morphometry. Results: RS was present in 49 (81.66%) specimens, it was oblique in 26 (43.33%), transverse in 23 (38.33%) and absent in 11 (18.33%) specimens, RS was classified into three different types - type 1, type 2, and type 3 based on its degree of penetration into the substance of the liver. Type 1, defined as a deep sulcus was present in 37 (61.66%) specimens. Type 2, a slit-like shallow sulcus was observed in 7 (11.66%) and type 3, scar-like sulcus was observed in 5 (8.33%) of specimens. The average length of RS was 2.84 cm, breadth was 0.18 cm and the average depth of the RS was 0.62 cm. Conclusion: RS is an important extra-biliary landmark of the liver, that could easily be visualized during laparoscopic hepatobiliary surgeries and its identification could definitely reduce the risk of bile duct and vascular injuries during these surgeries. Hence, the in-depth knowledge about the anatomy of RS which is less studied and not included in anatomy literature is essential.

МЕТОД ДИНАМИЧЕСКИХ ИЗМЕРЕНИЙ И ОПТИМАЛЬНОЙ ОЦЕНКИ СТЕПЕНИ ПРОНИКНОВЕНИЯ МОРСКОГО СОЛЕВОГО АЭРОЗОЛЯ В БЕРЕГОВЫЕ ПРОИЗВОДСТВЕННЫЕ ЗОНЫ

An accurate assessment of the emission of pollutants coming from the water surface is extremely relevant in studies of mass transfer between the sea and the atmosphere. The object of the study is a corrosive marine salt aerosol formed under the influence of wind, as a result of the dissipation of wave energy when hitting the shore. The subject of the study is the extent of the spread of sea salt aerosol under the influence of wind in coastal residential and industrial zones. The purpose of the study is to determine the nature of the change in wind speed over time, at which the total measuring signal at the output of the mobile meter would reach an extreme, i.e. the most reliable measurement result would be achieved. The aim of the study, when comparing the increasing and decreasing wind speeds, to determine such a dependence of wind speed on the current measurement time at which the measurement result would reach an extremum. The general task of estimating the amount of corrosive sea aerosol deposited in the coastal zone in this case is to estimate the amount of the current unsettled aerosol in the air. The proposed research method is to determine the penetration degree of sea salt aerosol into residential and industrial quarters, a dynamic measurement method is proposed, carried out using a mobile laboratory equipped with appropriate measuring equipment. The meter at point xi measures the aerosol generated by the wind at moment ti . For the optimal solution of the problem, the double averaging method is used. As a result a mobile measurement method is proposed to determine the degree of penetration of marine salt aerosol into the coastal production zone. The problem of determining the nature of the temporary change in wind speed in the coastal zone is solved with a known dependence of the amount of settled sea aerosol on the distance between the measuring point and the sea under the condition of a constant speed of movement of the mobile meter

СПОЖИВЧА ПОВЕДІНКА В НОВОМУ МЕДІАЛАНДШАФТІ

The article is devoted to analyzing a transformation of the end consumers’ behavior in the changing media environment. Informational, behavioral, and generational approaches to the transformation of consumption content are substantiated. The essential characteristics of the modern media paradigm are considered. The main challenges for traditional media are outlined. Qualitative and quantitative shifts in consumption of various types of media in certain countries are analyzed, and structural changes in media consumption are illustrated using the example of American society. The main causes of disparities in the degree of penetration of new media types are identified. Special attention was paid to the generation factor as the main prerequisite for the transformation of media consumption, as well as the acquisition of new consumer experiences and behavioral patterns. Other elements of the research program of consumption theory are proposed, reflecting the complications and expansion of consumer behavior taking into account the new media paradigm. Changes in roles, functions, structure, and forms of consumption implementation were studied. Distinctive characteristics of the Zoomers generation as a consumer segment are considered and the trends of its behavior in the digital space are reflected. The study exposes the activation and complication of the modern consumer, which is manifested in the diversification of needs and individualization of the information and communication space. It was established that the products are saturated with an informational component, which implies the inclusion of ideological, aesthetic, and other dimensions. The modification of the mechanism of consumer choice is explained by the growing influence of digital communications at each iteration of the purchase process. The algorithm of the consumer decision-making process is outlined, and the factors affecting this process are identified. It is noted that with the development of information and communication technologies and the expansion of the choice of media, the information saturation of the markets is increasing, which emphasizes the importance of partnership relations between the producer and the consumer. The article concludes with an outline of several megatrends and an assessment of their impact on consumer behavior.

Моделирование влияния цифровых технологий на уровень безработицы в России

The paper examines labor market patterns in the light of digital economy development. The aim is to analyze labor market conjuncture in terms of registered unemployment dynamics. The degree of digital economy development is assessed through three indicators: the share of organizations using (1) the Internet, (2) local area networks, (3) number of personal computers per 100 employees. In addition to technological development indicators, the article also makes account of certain demographic factors. Since early 2000s, the degree of Internet penetration in organizations has doubled, while the number of computers increased threefold. The share of elderly population and life expectancy rate have increased by 5 percent and 7 years respectively. Drawing on econometric panel data models regarding federal districts in Russia for 2003–2019, the author provides the following findings. First, the proliferation of technological advances reduces unemployment rate. Second, an increase in the proportion of population above working age and life expectancy entails the reduction in unemployment rate. Third, combined effect of technological and demographic factors increases unemployment rate. The magnitude of the reduction exceeds the degree of increase in the unemployment rate due to technological advances. Thus, technological unemployment is more likely a theoretical possibility. Fourth, the determinants taken into consideration explain from 38 to 43 percent of unemployment rate change. The proposed approach can be applied in designing regulatory policies regarding employment with regard to the implementation of digital technologies in organizations and population aging in Russia’s regions.

EXPERIMENTAL AND CLINICAL JUSTIFICATION OF THE USE OF COLLAGEN-FIBRIN ADHESIVE COMPOSITION FOR CLOSING A COLON DEFECT

Relevance: The aim of our study was to assess the degree of penetration of the intestinal area by connective tissue when using a collagen plate in rats with a colon defect. Increasing the efficiency of surgical treatment of pararectal fistulas.
 An experimental morphological study was carried out on laboratory rats of the Wistar line, which were divided into two groups consisting of 20 animals each, depending on the method of closure of the intestinal wall defect: group 1 main and group 2 comparison.
 The average weight of animals in each group was 180 ± 220 g.
 For the purpose of anesthesia, a sodium thiopental solution was used, which was prepared as follows: 1 g of sodium thiopental was diluted in 20 ml of 0.9% sodium chloride solution. Each animal was injected with 0.7 ml of a 0.5% solution.
 In the main group, the operation of closing the defect of the intestinal wall was carried out using a collagen-fibrin adhesive composition. In the comparison group, the operation of closing the defect of the intestinal wall was performed with interrupted sutures.
 At the end of the experiment, the animals were euthanized in equal numbers from each group, subject to the conditions of euthanasia, 10, 30, 60 days after surgery.
 As a result of the experimental study, the animals of the main group and the comparison group were all alive on day 10 after surgery.
 Morphological changes in histological samples of the large intestine with the closure of the intestinal wall defect with a collagen-fibrin adhesive composition consisted in pronounced leuko-lymphocytic cell infiltration. Individual infiltrates were observed that formed lymphoid follicles.
 An objective assessment of the immunohistological analysis of the samples of the operated intestine in animals from the comparison group at the same time showed the presence of a defect in the muscle layer with fragments of granuloma formed around the suture material. Filaments, multinucleated giant cells of a foreign body, epithelioid cells, mature dense connective tissue, and coarse collagen fibers were visualized in the samples. Also, in the samples of the intestine near the site of the defect, one can see the absence of complete restoration of the mucous-producing function of the glandular epithelium at the border with the site of damage, as evidenced by the uneven staining of vacuoles with mucin, a decrease in their number. These results indicate the advantage of proliferative inflammation processes with the formation of formed granulomas, foreign bodies around the surgical suture material. Morphological signs are characteristic of the surgical recurrent course of the inflammatory process in the intestinal wall, which was additionally provoked and supported by suture material. The use of the technique of nodular suturing of the intestinal wall defect in the experiment led to uneven germination of connective tissue around the suture material with foci of pronounced productive inflammation.
 Immunohistological studies have shown that the use of a collagen-fibrin adhesive composition minimizes the inflammatory reaction in the intestinal wall, accelerates regeneration processes and contributes to the anatomical restoration of the integrity of all layers in the defect zone. The postoperative results showed that among the patients of the main group, after three months of surgery, the recurrence of the perrectal fistula occurred in 1 patient with a collagen-fibrin adhesive composition (1.6%) concomitant type 2 diabetes mellitus. Among the patients of the comparison group, 5 patients (8.3%) had recurrent-prolonged wound infection.
 The introduction of a collagen-fibrin adhesive composition into the surgical treatment of pararectal fistulas increases the effect of treatment, namely, a decrease in the recurrence rate of 1.6% versus 8.3% in the comparison group.

The effects of dialect distance on the migrant population’s settlement intentions: evidence from the china migrants dynamic survey

ABSTRACT Based on the China Migrants Dynamic Survey (2017), this paper investigates whether the different linguistic environments effect migrant happiness and identity, and therefore further affect their settlement intentions. The empirical results show that dialect distance significantly dampens the settlement intentions of the migrant population through inhibiting their sense of urban identity and the social network renewal. This effect is contingent on migrant job types, the degree of Mandarin penetration, and the level of market-orientation in the specific region.

Experimental Study on Electrical Resistivity Characteristics of Saturated Sand Mixes with Bentonite Slurry

Bentonite slurry is widely used in underground and geotechnical engineering because of its strong ability of wall protection. Slurry penetration, which is of great significance for the soil stability, is difficult to observe directly during the soil and slurry interaction. Slurry penetration would change the electrical resistivity of soil, which provides an indirect method to monitor the degree of slurry penetration. This paper aimed to investigate the electrical resistivity characteristics of soil-bentonite mixtures. Several test groups with different material components were carried out. The effects of some factors including water environment, CMC (carboxymethyl cellulose) contents, soil particle gradation, and electrode distance on the electrical resistivity of slurry-soil mixtures were studied and the relationship between soil electrical resistivity and slurry concentration was established. The results in this paper can provide references for the application of the electrical method on slurry penetration.

Detecting Process Anomalies in the GMAW Process by Acoustic Sensing with a Convolutional Neural Network (CNN) for Classification

Today, the quality of welded seams is often examined off-line with either destructive or non-destructive testing. These test procedures are time-consuming and therefore costly. This is especially true if the welds are not welded accurately due to process anomalies. In manual welding, experienced welders are able to detect process anomalies by listening to the sound of the welding process. In this paper, an approach to transfer the “hearing” of an experienced welder into an automated testing process is presented. An acoustic measuring device for recording audible sound is installed for this purpose on a fully automated welding fixture. The processing of the sound information by means of machine learning methods enables in-line process control. Existing research results until now show that the arc is the main sound source. However, both the outflow of the shielding gas and the wire feed emit sound information. Other investigations describe welding irregularities by evaluating and assessing existing sound recordings. Descriptive analysis was performed to find a connection between certain sound patterns and welding irregularities. Recent contributions have used machine learning to identify the degree of welding penetration. The basic assumption of the presented investigations is that process anomalies are the cause of welding irregularities. The focus was on detecting deviating shielding gas flow rates based on audio recordings, processed by a convolutional neural network (CNN). After adjusting the hyperparameters of the CNN it was capable of distinguishing between different flow rates of shielding gas.