Rise Height Research Articles

Examine the lattice Boltzmann method for the mixed convection simulation of water/Al2O3 nanofluid in a 2D rectangular cavity under radiation with isothermal semicircular obstacles

The present study simulated the mixed convection (MCXN) of the water/Al2O3 nanofluid (NFs) in a two-dimensional rectangular cavity in the presence of radiation. The top and bottom walls were assumed to be cold and hot, respectively, with the lateral walls being insulated. A magnetic field (MGF) with a Hartmann number (Ha) of 0–40 was applied to the NFs within the cavity. The simulations were carried out at a Richardson number (Ri) of 1 and a Rayleigh number (Ra) of 105 for cavity heights of 0.5–2.0 to evaluate heat transfer (HTF) on the walls and analyze fluid rotation within the cavity. The lattice Boltzmann method (LBM) was used to perform the simulations. It was found that the incorporation of radiation into the system reversed the flow rotation in the cavity and increased the Nu. A rise in the radiation parameter from 0 to 0.2 led to a 2.8-fold larger Nu on the cold wall. A rise in the cavity height decreased the Nu, and a further increase in the height increased the Nu on the wall. An increased Ha had an insignificant effect on the Nu at small cavity heights but decreased the Nu on the wall at large cavity heights.

Pseudo-Kussmaul's Sign in Atrioventricular Nodal Reentry Tachycardia: A Prospective, Cohort Study.

To study the respiratory variation of right atrial (RA) pressures at baseline and during atrioventricular nodal reentry tachycardia (AVNRT). Of the 23 patients screened, 16 participants with typical AVNRT were included in the study. After ensuring adequate hydration, baseline RA pressures were measured as the height of 'a' and 'v' waves. The patients were asked to take deep breaths, and the measurements were taken in both inspiration and expiration. Of the 16 participants, 14(87.5%) showed a normal fall in the height of 'a' and 'v' waves with inspiration, 1(6.25%) showed no change and 1(6.25%) showed a rise in height at baseline, p <0.01. During induced AVNRT, the 'a' and 'v' wave heights increased in 8(50%), remained same in 6(37.5%) and showed a normal fall in 2(12.5%), p = 0.07 for 'a' waves and p = 0.09 for 'v' waves. When the magnitude and direction of change in 'a' and 'v' wave height at baseline was compared with AVNRT, it showed a significant difference with 13(81.25%) participants demonstrating positive Pseudo-Kussmaul's sign, p <0.01. Mean age was numerically higher in those with a more considerable inspiratory rise in RA pressures but was not statistically significant, χ2(2) = 3.1, p = 0.21. Pseudo-Kussmaul's sign does occur in a substantial number of patients during AVNRT. Clinical appreciation of this phenomenon is possible in half to three-fourth of patients, provided the mean RA pressures are low enough for the variation to be visible in the neck.

Analysis of the Process Parameter in Fluid Catalytic Cracking Unit for a Refining and Petrochemical Company in Nigeria

The aim of this study is to generate operational data that can be used to improve the production capacity in the Fluid Catalytic Cracking Unit (FCCU) in a Refinery and Petrochemical Company. This will aid in tackling the daunting challenge of unavailability of operational data that can be used to better understand and improve production capacity and ensure maximizing catalyst utilization. In addition, it addresses the challenges of analysis and control of the FCCU process due to its very complicated and little-known hydrodynamics, complex kinetics of both reactions of cracking and coke burning, strong interaction between the reactor and regenerator, and numerous operating constraints. Aspen HYSYS version 8.0 was used in modeling the cracking process using parameters extracted from the operating manual of the FCCU in the refinery. The operational data was used to compare the simulated effect of stepwise input in feed and reactor plenum temperatures as well as stepwise increase in reactor length on yield, catalyst-to-oil-ratio and catalyst regeneration. An optimum flow in naphtha was obtained by the interaction of the inlet crude flow rate, riser height, and temperature this optimum was supported by the study of the interaction of these parameters when, catalyst to oil ratio was set as the dependent parameter. The inferences drawn from the results are that the reactor plenum temperature of 560℃ and a riser length of 27 m are recommended for optimum performance that ensures lasting effect of an efficient catalyst activity.

The movement and shape change characteristics of a bubble passing through a liquid-liquid interface

In order to study the movement and shape change characteristic of bubble when passing through the interface of two kinds of liquids with different viscosity, the free rising process of a single bubble in static stratified liquids was numerically simulated with the volume-of-fluid method. The results show that, when the initial height of bubble rising is the same, the rising velocity, deformation increase with the increase of bubble radius. When the maximum intensity of the vortex in the bubble is distributed at the top of the bubble, the top of the left and right sides and the bottom of the left and right sides, the bubble shape is spherical, ellipsoid and spherical cap shape respectively. At different initial heights, the bubble trajectory shows three different shapes ? linear, spiral, and C-shaped. The relation-ship between the bubble aspect ratio and rising height is predicted when different radius bubble passing through the interface. The amount of liquid B (lower layer) carried by the bubble increases with the increase of the bubble?s initial radius, and the amount of liquid carried by bubbles in C-shaped trajectory is higher than that in spiral trajectory.

Design and Comparative Analysis of Pratt Roof Trusses Using Angular and Tubular Steel Sections through Limit State Method

A Pratt truss is a type of truss structure which is used in civil engineering to support heavy loads. It is comprised by the diagonal members and vertical members, which transmits the loads efficiently through a combination of tension and compression which is easy to construction and suitable for both short and medium span. But this project work is made to decide to structural performance employing angular and tubular steel sections by using Limit State Method by considering the economy and strength having 30 m span and rise height 5 m, with the help of software we analyse the truss by using angular and tubular sections. The analysis is carried out through STAAD Pro software and two steel sections were made to find their weight of steel, deflection which decides which structure is more economical to use. The outcomes of this project is that consists of comparative study on Pratt roof truss using angular and tubular steel sections by Limit State Method with help of STAAD Pro software to determine the optimistic, adequate and economic structure, then the loads are applied according to the Is 875 code, assigning steel sections such as channel, I-sections, etc. By the study of project we got the tubular section is economical to use as compared to angular section. Keywords: Structural Analysis, Roof Truss, STAAD PRO, Pratt truss, Limit State Method (IS 800:2007, IS 875-1975 (Part I, II &amp; III)

Biomineralização de carbonato de cálcio no concreto pela ação do Bacillus pumilus

ABSTRACT The present study evaluated the viability of the bacterium Bacillus pumilus as a biological agent in the process of calcium carbonate precipitation on a concrete surface. This evaluation was carried out in a curing tank of concrete samples, applying a nutrient solution enriched with B. pumilus for 48 h. During the experimental period, a urease test was performed to determine whether the microorganisms could hydrolyze urea by the action of the urease enzyme. The results revealed that B. pumilus is susceptible to converting urea into ammonium and increasing the medium pH. There was also a 0.03 g cm-2 reduction in water absorption by capillarity in specimens biomineralized with B. pumilus compared to conventional specimens. Due to the degree of surface protection, microorganisms have reduced the material’s porosity, causing an increase in tensile strength by diametric compression of approximately 9.0 MPa. The lower height of capillary rise observed was 1.83 cm in biomineralized specimens and 3.83 cm for conventional specimens. The results obtained with the scanning electron microscope and energy dispersive spectroscopy indicate the presence of CaCO3 precipitated by the bacteria. In general, the results obtained in this study show that B. pumilus may improve its mechanical properties when it is applied superficially to concrete.

Experimental investigation of sub-millimeter thermomagnetic pumps with temperature-sensitive magnetic fluid

• The sub-millimeter thermomagnetic pump was successfully fabricated and operated. • Temperature-sensitive magnetic fluid was used as the working fluid. • The input heat flux and channel height affect the thermomagnetic pump flow rate. • The high Prandtl number limits the pump’s flow rate while increasing channel height. • The axial heat conduction effect was observed in the sub-millimeter thermomagnetic pump. A thermomagnetic pump represents a novel pumping system that can be operated by simply heating and applying an external magnetic field. The working fluid in the thermomagnetic pump is temperature-sensitive magnetic fluid (TSMF). The magnetization of the TSMF decreases as its temperature increases. In the present study, a set of sub-millimeter thermomagnetic pumps was fabricated in microchannel systems with channel heights of 180, 290, 350, and 420 μm. A microheater was placed underneath the microchannel to control the input heat flux. A flow meter and five thermocouples were installed to examine the performance of these thermomagnetic pumps under different heating conditions. Although the flow rate increases as the height of the microchannel rise, the highest flow rate of 81.74 μl/min was achieved under the highest heating condition of 459.8 kW/m 2 and channel height of 350 μm, instead of 420 μm, due to the high Prandtl number of the TSMF.

Experimental Investigation of Capillary Rise in Unsaturated Gypseous Soils

Capillary rise is a phenomenon that must be considered an inevitable factor when dealing with unsaturated gypseous soil. This study investigates the behavior of gypseous unsaturated soil under capillary action, where different gypsum content and soil densities are experimentally tested in a developed laboratory model consisting of Transparent pipes 1 m long and 0.05 m in diameter. All the pipes are placed inside a rectangular basin with a dimension of (1500×500×500 mm). The soil was taken from Tikrit city in Iraq at a depth of (1.5 to 2 m) under the natural soil surface; the laboratory tests clarified that the soil is poorly graded sand with a gypsum percent of 59%. The three other gypseous soil samples were prepared by dissolving with HCl acid to gain the required percentages of gypsum (22, 37, and 6%). The results show that the presence of gypsum in the soil slows down the rise of water in the soil after rapid rising in the first stages of the test. The low and moderately gypseous soils required a shorter time to reach the maximum capillary rise than highly gypseous soils. Also, the existence of gypsum increased the max. The height of the capillary rise and the degree of saturation in the capillary zone were also noticed for all soil densities examined. The effective stress will be low in the fully saturated parts while it’s high in the low saturated parts.

Экспериментальное исследование подъема уровня жидкости в плоском капилляре, образуемом эластичными периодически растягиваемыми стенками

A water rise in a plane capillary with elastic periodically stretched walls is experimentally demonstrated. Dependence of the water meniscus rise height on the value of time-periodic elastic extension of capillary walls was measured. A deviation of the measured dependence from the linear dependence was recorded. The latter one could be realized in the mode of an ideal pinning of a meniscus edge.

Modification of Schottky barrier height for NiFe/p-Si contacts by inserting an ultra-thin HfO2 dielectric layer

The effects of HfO2 dielectric thickness (tHfO2) on the electrical properties of NiFe/HfO2/p-Si contacts were explored, and the microstructure and interfacial products of the contacts were analyzed. The results showed that Hf-O-Si bonds probably form at HfO2/p-Si interface and produce interface dipoles, and the number of the dipoles is positively linked to tHfO2. As tHfO2 grows from 0.5 to 1.5 nm, the enhanced dipole electric field will let the surface electric field of p-Si strengthen and the surface band of p-Si bend downwards, thus causing a rise in Schottky barrier height of the contacts and a dip in electric current.

How stair configurations in buildings affect pedestrian dynamics on stairs? A simulation study via an extended three-dimensional force-based model

Pedestrian movement on stairs is a complex three-dimensional dynamic process. However, previous models are inherently limited in that they ignored the significant effect of stair configurations. This paper presents an extended three-dimensional force-based model to describe pedestrian movement and evacuation dynamics on stairs. By calibrating with previous real-human experiments, this unique model is able to accurately reproduce the velocity/density relation under a wide range of inclination stairways. Then, we explored the basic questions about pedestrian dynamics on complex stair configurations. The results demonstrated that: (1) this unique model shows good universality for simulating pedestrian dynamics on stairs; (2) under the combined effect of narrow exit and stairway, the stair part is the primary factor that affects the specific flow; (3) the optimal stair dimension is a set of tread depth and riser height; (4) pedestrian density and the geometric layout of the stairwell significantly influence pedestrian merging ratio at the merging zone.

Overcoming the Limitations of the Berg Balance Scale (BBS)

Research Objectives To increase the sensitivity of the BBS tasks to effectively determine and track the falls risk of individuals. Design The BBS is commonly used to measure falls risk in older adults, but can only be utilized during face-to-face assessments. Due to COVID-19, a virtual health method of assessing falls risk in older adults is necessary. Markerless motion capture was used to provide a quantitative approach to static and dynamic elements of the BBS. This new protocol was dubbed the Enhanced Virtual BBS, or eV-BBS. The eV-BBS provides significantly more objective information than the current BBS, thereby improving its sensitivity and reproducibility. Setting University of Alberta Rehab Robotics Lab, Edmonton, Canada, during the COVID-19 pandemic. Participants A convenience sample of 10 healthy participants were selected. Interventions A test-retest reliability model determined the inter- and intra-participant variability when conducting the sit-to-stand and balance test in the BBS. Main Outcome Measures Novel parameters were created to represent the characteristics of the sit-to-stand and balance components of the BBS, such as rise height, drop height, and root mean square of trunk sway. Results The study revealed significant test-retest reliability (ICC = 0.81 to 0.99) and repeatability (COV < 20%) for the static stability tasks. The sensitivity of the eV-BBS to detect changes between participants was revealed during the analysis of the dynamic stability tasks, which had poor reliability (ICC = 0.10 to 0.60) and repeatability (COV > 20%). Conclusions The results indicate that the current BBS focuses on qualitative measures of sway and task timing. The dynamic and static components (of the sit-to-stand test in particular) are not identified, yet we know these are critical to assessing falling risk. The variability seen in the dynamic data of eV-BBS is likely to be attributable to subtle differences in participant performance of the task. Sensitivity of eV-BBS is high, but the level of sensitivity needed will only become apparent when participants at risk for falling are included in a future study. Author(s) Disclosures The authors have no conflicts of interest to declare. To increase the sensitivity of the BBS tasks to effectively determine and track the falls risk of individuals. The BBS is commonly used to measure falls risk in older adults, but can only be utilized during face-to-face assessments. Due to COVID-19, a virtual health method of assessing falls risk in older adults is necessary. Markerless motion capture was used to provide a quantitative approach to static and dynamic elements of the BBS. This new protocol was dubbed the Enhanced Virtual BBS, or eV-BBS. The eV-BBS provides significantly more objective information than the current BBS, thereby improving its sensitivity and reproducibility. University of Alberta Rehab Robotics Lab, Edmonton, Canada, during the COVID-19 pandemic. A convenience sample of 10 healthy participants were selected. A test-retest reliability model determined the inter- and intra-participant variability when conducting the sit-to-stand and balance test in the BBS. Novel parameters were created to represent the characteristics of the sit-to-stand and balance components of the BBS, such as rise height, drop height, and root mean square of trunk sway. The study revealed significant test-retest reliability (ICC = 0.81 to 0.99) and repeatability (COV < 20%) for the static stability tasks. The sensitivity of the eV-BBS to detect changes between participants was revealed during the analysis of the dynamic stability tasks, which had poor reliability (ICC = 0.10 to 0.60) and repeatability (COV > 20%). The results indicate that the current BBS focuses on qualitative measures of sway and task timing. The dynamic and static components (of the sit-to-stand test in particular) are not identified, yet we know these are critical to assessing falling risk. The variability seen in the dynamic data of eV-BBS is likely to be attributable to subtle differences in participant performance of the task. Sensitivity of eV-BBS is high, but the level of sensitivity needed will only become apparent when participants at risk for falling are included in a future study.

Effects of the T-abrupt exit configuration of riser on fuel properties, combustion characteristics and NOx emissions with coal self-preheating technology

NOx generated from coal combustion brings about severe environmental problems. Among many combustion technologies, coal self-preheating combustion technology is valued for its great potential of low NOx combustion, while in-depth studies on the structure of the self-preheating device (SPD) have not been carried out, which makes it difficult to further reduce NOx. In addition, disposal of coal gasification fly ash (CGFA), a kind of solid waste, is still mainly dissipated in landfills, resulting in the pollution of soil, water and wastes energy. In order to optimize the SPD structure for further reducing NOx and provide technical support for the engineering utilization of CGFA, the properties of preheated fuel (coal gas and coal char), the behavior characteristics of combustion and NOx emission under different He/Hr (the ratio of projected height to the riser height) were investigated on a 30 kW bench-scale test rig. Stable and high efficient MILD combustion was achieved without manifest flame front. The results revealed that appropriate increase of He/Hr ratio was conducive to the release of fuel-N during preheating, facilitating the conversion of fuel-N to N2. For BC and CGFA, the pre-removal effect of fuel-N in the SPD reached the best when He/Hr ratio was 3/8 and 1/4, respectively. The increase of He/Hr ratio was not salutary to improving the combustion reactivity of BC, while for CGFA, the modification effect on the combustion reactivity of coal char could reach the best when He/Hr ratio = 1/4. Both NOx emission and the conversion ratio of fuel-N to NOx of BC and CGFA could reach the optimal value when He/Hr ratio was 1/4.

Selection of red clover for fodder quality

The article presents the results of studies of clover breeding for fodder quality in the conditions of North Ossetia-Alania. Based on the assessment of the initial breeding material, it was revealed that the quality of the chemical composition of the green mass of clover undergoes variability depending on climatic conditions, the protein content of the test samples varies from the phase of development, year of life, place of growth and genotype of the variety. With the rise of the mountain height, the crude protein increases, positive correlations have been established between the protein content and the traits: pubescence of the stems, foliage, intensity of the leaf pattern, leaf color, the correlated traits depend on the varietal characteristics and range from weak to close positive, the amount of essential amino acids varies from habitats, the content of extragenic isoflavones in wild forms is lower than in the cultivated variety, selection for a low content of isoflavones does not reduce yields. In order to select samples with a low content of isoflavones, an evaluation of the breeding material was carried out. Their content in different samples and places of growth was taken into account, taking into account vertical zonality. Our studies have established that in the phase of full flowering, the amount of isoflavones in wild-growing forms depends on the place of growth. In mountainous areas, wild-growing forms contain isoflavones 0.09-0.25% lower than the cultivar Osetinsky. Therefore, the selection of wild-growing forms, taking into account vertical zonality, will provide a valuable source material for breeding with a low content of isoflavones.

6-Paradol Alleviates Testosterone-Induced Benign Prostatic Hyperplasia in Rats by Inhibiting AKT/mTOR Axis.

Introduction: Benign prostatic hyperplasia (BPH) is a common disease among elderly men. Its pharmacological treatment is still unsatisfactory. 6-Paradol (6-PD) is an active metabolite found in many members of the Zingiberaceae family. It was reported to possess anti-proliferative, antioxidant, and anti-inflammatory activities. The present study aimed at exploring the potential of 6-PD to inhibit testosterone-induced BPH in rats as well as the probable underlying mechanism. Methods: Male Wistar rats were divided into 6 groups and treated as follows: Group 1 (control group) received vehicles only, Group 2 testosterone only, Groups 3 and 4 received 6-PD (2.5 and 5.0 mg/kg; respectively) and testosterone, and Group 6 received finasteride and testosterone. Results: Daily treatment of animals with 6-PD at the two dose levels of 2.5 and 5 mg/kg significantly ameliorated a testosterone-induced rise in prostate index and weight. This was confirmed by histological examinations of prostatic tissues that indicated a reduction in the pathological changes as well as inhibition of the rise in glandular epithelial height in 6-PD treated rats. Immunohistochemical investigations showed that 6-PD prevented the up-regulation of cyclin D1 induced by testosterone injections. Further, 6-PD significantly modulated mRNA expression of both Bcl2 and Bax in prostate tissues of testosterone-treated rats in favor of anti-proliferation. It also showed antioxidant activities as evidenced by inhibition of accumulation of malondialdehyde (MDA) and exhaustion of catalase (CAT) activity. In addition, 6-PD displayed significant anti-inflammatory activities as it prevented up-regulation of interleukin-6 (IL-6) and nuclear factor kappa B (NF-κB). Immunoblotting analysis revealed that 6-PD significantly inhibited testosterone-induced activation of AKT and mTOR in prostate tissues. Conclusions: 6-PD protects against testosterone-induced BPH in rats. This can be attributed, at least partly, to its antiproliferative, antioxidant, and anti-inflammatory properties as well as its ability to inhibit activation of the AKT/mTOR axis.

Treatment outcome at 1 year did not differ between use of cast or walker in the first 3 weeks after an acute Achilles tendon rupture. A registry study of 1304 patients from the Danish Achilles tendon database

BackgroundThe best choice of orthosis in the treatment of acute Achilles tendon rupture is still under debate. ObjectiveTo investigate if choice of orthosis in the first 3 weeks of treatment affected patient reported outcome (Achilles tendon Total Rupture Score (ATRS)), tendon elongation (Achilles Tendon Resting Angle (ATRA) and Heel Rise Height (HRH)) and re-rupture. MethodsRegistry study in the Danish Achilles tendon Database. Patients treated with cast and patients treated with walker in the first 3 weeks of treatment were compared using a linear mixed-effects model adjusted for potential confounders. Results1304 patients were included in the study. No clinically relevant difference was found: Adjusted mean difference (using walker the whole period as reference)(95% CI) ATRS after 1 year = 0.1(−3.0; 4.1), ATRS after 6 months = 2.0(−4.5; 5.8), ATRS after 2 years = 3.0(−0.7; 7.0), HRH difference = 0.6(−6.6; 8.2), ATRA difference = 0.03°(−1.5; 1.6), re-rupture(odds ratio) = 0.812(0.4; 1.61). ConclusionPatients treated with cast the first 3 weeks after acute Achilles tendon rupture did not have better treatment outcome than patients treated with walker.

О КОНТАКТНОМ УГЛЕ СМАЧИВАНИЯ ПРИ ОПРЕДЕЛЕНИИ ВЫСОТЫ КАПИЛЛЯРНОГО ПОДЪЕМА В ПЕСЧАНЫХ ГРУНТАХ

The use of local materials in the design of hydraulic structures of reclamation systems will significantly reduce their cost. Object. The objects of research are sapropels, sands and mixtures based on them. Materials and methods. Standard methods were used to deter-mine particle size distribution, porosity, density, and capillary rise height. Results and conclusions. The analysis of the data obtained showed good convergence of the experi-mental one after 1 day and the theoretical heights of the capillary rise for sands at a con-tact angle of 30

Finite-Element Analysis on the Tensile Membrane Effect in Geogrid Reinforced Piled Embankment under Dynamic Loading

This study presented a numerical investigation of the tensile membrane effect in the geogrid reinforced piled embankment under dynamic loading. It has been found that the maximum sag of the geogrid was attained at the center of two adjacent piles, while localization of tensile force was observed at the corners of the pile caps. Under the dynamic loading, the sag and the strain of the geogrid increased when compared with the static loading, an increase of around 45.9% and 24% was, respectively, yielded for the sag and the strain of the geogrid. This increase of tension in the geogrid may mainly result from the degradation of the soil arching effect under dynamic loading. A parameter study was performed, and it showed that the tensile force in the geogrid increases with the rise of the embankment height, the clear pile spacing, and the tensile stiffness of the geogrid. However, the increase of the friction angle of the embankment fill led to a decrease in the tension in the geogrid, which may benefit from the improvement of the soil arching developed in the embankment fill. It was found that the tensile behavior of the geogrid was the most sensitive to the pile spacing. When pile spacing increased from 2.0 m to 3.0 m, the tensile force in the geogrid increased by about 248%.

Impacts of Stratospheric Polar Vortex Shift on the East Asian Trough

Abstract Impacts of stratospheric polar vortex shift on the wintertime East Asian trough (EAT) on intraseasonal time scales are investigated using a reanalysis dataset and a climate model. The result based on composite analysis shows that the shift of the stratospheric polar vortex toward eastern Siberia (ES-shift event) is associated with higher geopotential height at 500 hPa than normal over East Asia, corresponding to the weakened EAT. Furthermore, the simulated EAT is also weakened when nudging the stratospheric state toward that during the ES-shift events. This study further found that there is no significant difference in the stratospheric polar vortex intensity between the ES-shift events and nonshift events, implying that the polar vortex strength change may have little influence on the possible connection between the polar vortex shift and the EAT change. The underlying mechanisms are listed as follows: First, the positive potential vorticity (PV) anomalies in the lower stratosphere associated with ES-shift events could explain approximately 40% of the local westerly anomalies in the upper troposphere to the north of East Asia via PV conservation, leading to the rise of the geopotential height over East Asia and the weakening of the EAT. Second, the shift of stratospheric polar vortex could modulate the synoptic-scale Rossby wave activity in the upper troposphere, favorable for the southward propagation of synoptic-scale waves and divergence of extended Eliassen-Palm flux in the upper troposphere. Finally, the transient wave feedback could enhance the tropospheric westerly anomalies in the north of East Asia and induce positive height anomalies to its south, further weakening the EAT. Our results revealed that the stratospheric polar vortex shift leads the EAT intensity variation by around 2–5 days, implying that the stratospheric polar vortex shift could be applicable to the prediction of the EAT intensity.

Self-propelled Subsurface Radar Detector of Low-Depth Objects

Portable, mobile and mobile subsurface radar detectors are in high needed for localizing inhomogeneities and hidden defects in monitoring the condition of road surfaces, studying the upper layer of the earth's surface during humanitarian demining and identifying caches. Despite the presence of a number of specialized devices, the problem of ensuring reliable operational detection of near-surface and shallow objects has not been fully resolved. One of the promising directions in the development of a subsurface radar detector with an increased efficiency of object detection when deepening up to 1,5 ... 2 λ is associated with the use of a continuous ultra-wideband FMCW signal and optimization of the structural design of the system, which ensures the maintenance of a given height of rise of the antenna unit above the studied environment with its high mobility. The article presents the results of the development of a self-propelled subsurface radar detector with a continuous probing signal, including the substantiation of the technical appearance of the device, the development of a concept layout and the results of experimental studies. The device is made on a four-wheeled automated platform with an adjustable console on which the antenna unit moves. With the forward movement of the platform, a sequential radar survey of the upper soil layer is performed, the results of which in the form of a surface projection of the normalized power of depth portraits are displayed on the monitor screen. The conducted field tests of the device showed reliable detection of near- and subsurface objects made of dielectric and metallic materials.