Rectification Procedure Research Articles

Chronic Uterine Inversion in a Young Adult: Case Report

Background: Uterine inversion is a rare but serious complication wherein the uterus is partially or completely turned inside out. It can either be acute or chronic. Unlike acute uterine inversion which occurs as a complication during parturition, which can be promptly managed, chronic uterine inversion poses a diagnostic difficulty even for an experienced gynecologist. We, herein, report a patient who was managed and followed up at our institution for chronic uterine inversion. Case presentation: A 30-year-old female, P4L4 previous all vaginally delivered, presented with complaints of something coming out of her vagina, per vaginal bleeding and foul-smelling discharge. On Physical examination, the patient was severely anaemic and revealed a bleeding, necrotic mass on inspection and the entrance of the cervix felt high up on per speculum and per vaginal examination. The patient was diagnosed as having chronic uterine inversion. The patient was admitted and was made hemodynamically stable with intravenous fluids and three units of blood. Manual reduction using vaginal procedure to reposition the uterus wasn’t successful, hence she was taken up for surgery. Fibroid was resected vaginally. Then Haultain rectification procedure was performed and then the definitive procedure of hysterectomy was done. Postoperatively, the patient was kept under observation and was vitally stable. Histopathology reported leiomyoma. Conclusion: Though non-puerperal uterine inversion is rare, a few cases will still have to be managed without any previous experience. This differential has to be considered as a possibility in a non-pregnant woman presenting with bleeding or mass per vagina with or without hypotension and can very rarely present as postmenopausal bleeding. Irrespective of age or parity, pre-operatively or intra-operatively, associated malignancy is to be ruled out in every case of uterine inversion. The prognosis depends on prompt diagnosis and timely intervention. Keywords: Fibroid, chronic, non-puerperal, uterus, inversion.

Failure analysis based optimum hole spacing of underexcavation for leaning building rectification

The underexcavation technique is one of the most commonly used ones for the rectification of leaning buildings. It usually involves hole digging, and soil removing in the base. The potential failure of the soil between the digging holes determines the hole spacing, which is of critical importance in the safety and efficiency of the entire rectification procedure. The determination of the hole spacing is primarily related to the soil parameters, the upper load induced by the structure, and the holes diameter. In context with this problem, an experimental study, and related computational simulations were conducted with three different hole spacing values. The failure mode of the soil between the holes, and the settlement were studied. It was found that for smaller hole spacing, the failure and the settlement of the soil was more pronounced. Thus, an optimal hole spacing was sought, which was related to the starting point of the leaning building straightening back. In this context, the finite element limit method was employed to determine the optimal hole spacing, with the soil ultimate strain treated as the failure criterion. Further, a parametric study on typical clay and silty soils was undertaken, and the optimal hole spacing values for different upper loads were determined for three typical cases of soil parameters. Finally, three actual rectification projects were considered to assess the reliability of the developed procedure. Hopefully, this method can be a facilitating tool for apriori studies, and initial planning of rectification related engineering projects.

True orthophoto mosaic generation: a simple and fast method

UAV-based images are now widely used to generate large-scale orthophoto mosaics. The generation of an orthophoto mosaic is divided into two stages: image registration and image stitching. Using the DSM associated with each image, orthophotos are generated throughout the image registration. The single orthophotos generated are then joined to each other step by step in the second stage, utilizing various methods of image stitching. Image stitching methods depend on the complex and challenging processes of image matching and seamline determination. In addition, the registration and stitching of images in UAV-based mapping projects with a significant number of images is a time-consuming process. In this study, a straightforward method is provided for creating large-scale true orthophoto mosaics from UAV-based images without the requirement to generate single orthophotos, image registration and seamline network determination. Instead of registrating the images and then stitching them step-by-step, this method processes the DSM of the entire area and all of the images simultaneously. First, for each DSM point, the optimal image is determined from among all the visible images based on an optimization procedure. Optimization is based on two criteria: distance from nadir point and distance from the projection center. Using the determined optimal images, the differential rectification procedure is then run, and the orthophoto mosaic cells are filled. The results of this investigation demonstrated that the proposed method yielded a mosaic with minimal changes along the seamline. In addition, the proposed method is compared with the conventional orthophoto mosaic production method, which is based on image matching and determination of seamlines. Evaluations indicate that the proposed method is able to increase the production rate of orthophoto mosaic by 39% and 45% in dataset 1 and 2 respectively. Additionally, the geometric accuracy calculated using the checkpoints in the orthophoto mosaic generated by the suggested method has decreased by an average of 2 cm, indicating more precise results.

Method for evaluating the resource, energy, and environmental impact of the casting fault rectification process in patternless sand castings

This study analyzes and compares the casting fault rectification procedure's resource, energy, and environmental impacts. In addition, a casting defect classification approach is provided to categorize them into three categories: more-component, less-component, and unqualified-component. Regarding energy, resources, and the environment, the analysis is conducted. A casting defect process impact model is constructed to obtain a quantitative study of the influence of various casting defects on production status and sustainability. Based on the model, the effect of repairing defects on resources, energy, and the environment for each of the three casting defects is examined. Moreover, it can be concluded from the case that the total impact of less-component defects is the largest, accounting for 50% of total scrap and 60% of resource consumption; the average repair cost of unqualified-component defects is 1.8 times higher than the average, yet their energy regeneration rate can reach 41%; the average resource and energy deviation rate of more-component defects is approximately 5%, yet their resource regeneration rate is 8% to 12% lower than other forms of defects. In conclusion, the model can effectively quantify the sustainability of the casting defect repair process and aid the foundry industry in achieving sustainability.

Optimized rectification of fiber orientation density function with background threshold

PurposeTo describe an optimized fiber orientation density function (fODF) rectification procedure that removes negative values and absorbs all features below a specified threshold into a constant background. Theory and methodsThe fODF for a white matter imaging voxel describes the angular density of axons. Because of signal noise and Gibbs ringing, fODFs estimated with diffusion MRI may take on unphysical negative values in some directions and contain spurious peaks. In order to suppress such artifacts, an fODF rectification procedure is proposed that both eliminates all negative values and incorporates all features below a specified threshold, η, into a constant background while at the same time minimizing the mean square deviation from the original, unrectified fODF. Calculating this fODF is straightforward, and the directions and shapes of peaks not absorbed into the background are preserved. The rectification method is illustrated for an analytic fODF model and for experimental diffusion MRI data obtained in healthy human brain, with the original fODFs being obtained from fiber ball imaging. ResultsExamples of optimal rectified fODFs are given for three choices of the background threshold referred to as minimal rectification (η = 0), average-level rectification (η ≈ 0.08), and fractional-anisotropy-axonal-based rectification (η ≈ 0.1). As η is increased, artifacts and other small features are more strongly suppressed, but the major fODF peaks are largely unaffected for the range of η values illustrated by these three alternatives. ConclusionArtifactual features of fODFs estimated with diffusion MRI can be effectively suppressed by applying the proposed optimized rectification procedure. Since it minimizes fODF distortion in the mean square sense, it may be useful in the study of how fODF fine structure is affected by aging and disease.

Numerical Study of Flow Field Optimization for Forebay and Suction Chamber to Solve the Vibration of Pumps in a Parallel Circulation Pumping Station

The water inlet channel is an essential component of the thermal power plant’s circulating water system. It primarily arranges the water flow in the channel so that it is introduced into the pump room smoothly, steadily, and uniformly. Significantly, the operation state of the circulating water pump is impacted by the flow condition of the water inlet channel. The coal-fired generating set’s water input channel was chosen as the research object in this work, and the Computational Fluid Dynamics (CFD) Method was used to examine hydraulic issues impacting anomalous vibration of circulating pumps. Nine optimization options were also suggested, and the effects of the various plans on the water inlet channel’s flow state were examined—the simulation’s outcomes. The simulation’s findings indicate that the arc deflector can enhance the water entry channel’s flow pattern. The wall-attached bias flow of the suction chamber vanished, and the constant flow state is present around the pump’s bellmouth. The thermal power unit’s circulating water pump’s vibration was eliminated, and the circulating pump’s operating efficiency increased due to the curved deflector’s rectification procedures being implemented in the forebay. The study’s findings can guide the hydraulic performance optimization of channels for water inlets with similar sideways or high slopes.

A Bachelor Degree Program in IoT Engineering

In the era of the fourth industrial revolution, technology is advancing at a pace much faster than what individuals, societies and nations can cope with. Internet of Things (IoT) is one such technology that is sweeping the economic, business and service landscapes with its disruption mechanisms that influence areas such as smart homes, hospitals, cities, as well as transportation and energy utilization with many exciting and novel applications. Additionally, the job market is evolving at a rate that makes it difficult for universities to sustain a stable programme structure, especially in engineering and information and communication technology disciplines as well as specializations and domains associated with technology. While several universities worldwide have established IoT degree programs at bachelor and master levels, institutions in developing countries are still contemplating the idea of pioneering such venture due to a number of reasons related to technology vacillation as well as market and social acceptance. Princess Sumaya University for Technology has therefore designed a bachelor degree programme on IoT Engineering in order to bridge the gap in the Jordanian ICT market and to meet demands for specialized engineers in this rapidly evolving area. The university adapted an optimization design process of the program including a cycle of consultation with stakeholders, followed by a formal procedure of rectification and accreditation. The proposed program was successfully a launched at the beginning of the academic year 2021/2022 with an intake cohort of 50 students.

Metric Rectification of Spherical Images

This paper describes a method for metric recording based on spherical images, which are rectified to document planar surfaces. The proposed method is a multistep workflow in which multiple rectilinear images are (i) extracted from a single spherical projection and (ii) used to recover metric properties. The workflow is suitable for documenting buildings with small and narrow rooms, i.e., documentation projects where the acquisition of 360 images is faster than the traditional acquisition of several photographs. Two different rectification procedures were integrated into the current implementation: (i) an analytical method based on control points and (ii) a geometric procedure based on two sets of parallel lines. Constraints based on line parallelism can be coupled with the focal length of the rectified image to estimate the rectifying transformation. The calculation of the focal length does not require specific calibrations projects. It can be derived from the spherical image used during the documentation project, obtaining a rectified image with just an overall scale ambiguity. Examples and accuracy evaluation are illustrated and discussed to show the pros and cons of the proposed method.

Effective Hamiltonians and Lagrangians for Conditioned Markov Processes at Large Volume

When analysing statistical systems or stochastic processes, it is often interesting to ask how they behave given that some observable takes some prescribed value. This conditioning problem is well understood within the linear operator formalism based on rate matrices or Fokker-Planck operators, which describes the dynamics of many independent random walkers. Relying on certain spectral properties of the biased linear operators, guaranteed by the Perron-Frobenius theorem, an effective process can be found such that its path probability is equivalent to the conditional path probability. In this paper, we extend those results for nonlinear Markov processes that appear when the many random walkers are no longer independent, and which can be described naturally through a Lagrangian-Hamiltonian formalism within the theory of large deviations at large volume. We identify the appropriate spectral problem as being a Hamilton-Jacobi equation for a biased Hamiltonian, for which we conjecture that two special global solutions exist, replacing the Perron-Frobenius theorem concerning the positivity of the dominant eigenvector. We then devise a rectification procedure based on a canonical gauge transformation of the biased Hamiltonian, yielding an effective dynamics in agreement with the original conditioning. Along the way, we present simple examples in support of our conjecture, we examine its consequences on important physical objects such as the fluctuation symmetries of the biased and rectified processes as well as the dual dynamics obtained through time-reversal. We apply all those results to simple independent and interacting models, including a stochastic chemical reaction network and a population process called the Brownian Donkey.

An iterative rectification procedure analysis for historical timber frames: Application to a cultural heritage Chinese Pavilion

The paper deals with the challenging problem of the rectification of leaning 3D historical timber frames. A prestigious case study is analyzed, namely the Feiyun Pavilion, PRC. Detailed onsite investigations on geometry, out-of-verticality, damages, material properties and building details are carried out. A finite element (FE) trial and error numerical procedure of rectification is then proposed in a general framework, basing on a discretization into FEs of the frame in its deformed configuration and on the application of horizontal displacements at the nodes belonging to the external box edges. The procedure is automatized in Ansys commercial code; beams, pillars and braces are modeled with an elasto-plastic orthotropic material, whereas for joints non-linear translational and rotational springs are utilized, with non-linear constitutive relationships deduced from suitable experimentation. The following phases define the core of the rectification algorithm: (i) application of the anti-displacements that equal the experimentally measured out-of-verticality values to produce corrective forces, (ii) strengthening of the joints and elements to improve structural stiffness, e.g. with hooping steel belts and reinforcing plate, (iii) removal of the corrective forces and consequent elastic return of the structure to a new position that still exhibits deviation, (iv) re-application of anti-displacements equal to the residual deviation found in (i)+(iii), (v) repetition of phase (i), (iii) and (iv) until the residual deviation is eliminated. The corrective displacements can be obtained by the superposition of anti-displacements applied in each cycle. The procedure is successfully applied in a single benchmark and -using an approximate but effective way- to the complex leaning structure under consideration which requires huge restoration. The approach shows excellent rectification capabilities in the idealized case, as well as a fairly good performance in the case of the existing structure considered as case study, where different deterioration phenomena are taken into account.

Application of hybrid model fuzzy AHP - VIKOR in selection of the most efficient procedure for rectification of the optical sight of the long-range rifle

The paper presents a decision support model when choosing the most efficient rectification procedure of the optical sight of the long - range rifle. The model is based on the fuzzy AHP method and the VIKOR method. Using the fuzzy AHP method, coefficient values of the criteria were defined. Fuzzification of the AHP method was performed by combining data obtained from experts - comparison of criteria in pairs and the degree of confidence in the comparison. Using the VIKOR method, the best alternative was selected. Through the paper, the criteria that condition this choice are elaborated and the application of the method in a specific situation is presented. Also, the paper presents the sensitivity analysis of the developed model.

Optimized rectification of fiber orientation density function.

To demonstrate an optimized rectification strategy for fiber orientation density functions (fODFs). In white matter, fODFs can be estimated with diffusion MRI. However, because of signal noise, imaging artifacts and other factors, experimentally determined fODFs may take on unphysical negative values in some directions. Here, we show how to rectify such fODFs to eliminate all negative values while minimizing the mean square difference between the original and rectified fODFs. The method is demonstrated for a mathematical model and for fODFs estimated from experimental human data using both constrained spherical deconvolution and fiber ball imaging. Comparison with an alternative nonoptimized rectification approach is also provided. For the mathematical model, it is found that the optimized rectification procedure removes negative fODF values while at the same time reducing the mean square error. Relative to the alternative rectification approach, the optimized fODFs are substantially more accurate. For the experimental data, the optimized fODFs have a lower average fractional anisotropy axonal and often fewer small peaks than the original, unrectified fODFs. The calculation of optimized fODFs is straightforward where the main step is the finding of the root to an equation in one variable, as may be efficiently accomplished with the bisection method. Unphysical negative fODF values can be easily eliminated in a manner that minimizes the mean square difference between the original and rectified fODFs. Optimized fODF rectification may be useful in applications for which negative values are problematic.

Augmented Ship Tracking Under Occlusion Conditions From Maritime Surveillance Videos

Ship tracking provides crucial on-site microscopic kinematic traffic information which benefits maritime traffic flow analysis, ship safety enhancement, traffic control, etc., and thus has attracted considerable research attentions in the maritime surveillance community. Conventional ship tracking methods yield satisfied results by exploring distinct visual ship features in maritime images, which may fail when the target ship is partially or fully sheltered by obstacles (e.g., ships, waves, etc.) in maritime videos. To overcome the difficulty, we propose an augmented ship tracking framework via the kernelized correlation filter (KCF) and curve fitting algorithm. First, the KCF model is introduced to track ships in the consecutive maritime images and obtain raw ship trajectory dataset. Second, the data anomaly detection and rectification procedure are implemented to rectify the contaminated ship positions. For the purpose of performance evaluation, we implement the proposed framework and another three popular ship tracking models on the four typical ship occlusion videos. The experimental results show that our proposed framework successfully tracks ships in maritime video clips with high accuracy (i.e., the average root mean square error (RMSE), root mean square percentage error (RMSPE), mean absolute deviation (MAD) and mean absolute percentage error (MAPE) are less than 10), which significantly outperforms the other popular ship trackers.

How Accurate are Locations in Malaysian Accident Data? Development of a Rectification Procedure based on Nested Filtered Search Technique

Errors in the accident data arise due to several individual and institutional shortcomings with inaccurate or ambiguous locations being the most serious amongst them. To overcome this issue a procedure has been devised in this study to rectify accident locations in the Malaysian accident data. The algorithm uses filtered search technique to match the accidents from the accident database with intersections from the field database. A total of 2809 accident records were screened for this purpose and 304 intersections were surveyed. The results showed that the algorithm is able to match up to 60% of the accidents to their respective locations depending upon the quality of the available records. Information related to only five parameters; major road width, landuse, lane marking, traffic control and geometry, are required for its implementation. Unlike geographic coordinates, these parameters are easily measurable and do not require any specialized equipment. The procedure is more relevant to low- and middle-income countries, where landmarks are much commonly used for location identification instead of geographic coordinates.

Rectification of walls of the historical brick barrack on the site of the former German Nazi Concentration and Extermination Camp KL Auschwitz - Birkenau

The construction of the German Nazi concentration and extermination camp Auschwitz II - Birkenau started at the end of 1941. A barrack with the current inventory no. B-123, situated at the section BI, was then erected. The barrack has a documentary and historical value. The barrack walls are characterised by the low stiffness, because with the building’s plan of 36.17 m × 11.39 m, the walls are only 0.12 m thick. All the outer walls have been substantially deformed or vertically deflected. Up to 100 mm wide gaps have formed between the deformed and deflected external walls and contiguous walls as a result. The stability of the walls was at risk, because a bad-quality wall was loaded with horizontal and vertical forces transmitted from the roof on the eccentricity reaching 100 mm. Deformations were progressing over time as a consequence of such forces. Individual rectification procedures were designed and implemented for each wall as part of the comprehensive conservatory and building works, the purpose of which was to ensure the stability. This article presents a procedure of rectification the eastern gable wall and the outer, longitudinal northern wall. The deformation of the eastern gable wall was removed by changing its static scheme, by inserting hinge regions into the wall along the line of selected bed joints. Separate wall patches, which could rotate relative to each other, were created as a result of the forces acting perpendicular to the wall surface. By causing the mutual rotation of such patches, the eastern gable wall reached the desired vertical position. The vertically deflected, longitudinal outer northern wall was rectified by rotating the wall in relation to the wall support edge on the foundations. An analogous procedure was applied to the outer longitudinal southern wall. After the completed rectification, the walls were anchored to the contiguous walls; the places of rotation and anchoring were filled with mortar. A different procedure was adopted for the other deflected walls. The advancing deformations of the western gable wall were stopped by stabilising its position with the steel elements connected with ties anchored in the ground. It was inadmissible to rectify this wall because it is covered with plaster and paint coats with a high historical value.

A loop-by-loop defect rectification procedure for optimal synthesis of Stephenson III path generators

This paper presents a formulation of constraints for the synthesis of Stephenson III mechanism and a loop-by-loop defect-rectification procedure. The procedure divides the Stephenson III mechanism into two loops, namely, Loop I, i.e., four-bar, and Loop II, i.e., five-bar mechanisms. Then, the defects are identified using the established methodology to formulate the defect-specific constraints in the simplified form. Based on the constraints, an optimization problem is formulated to synthesize a Stephenson III mechanism for path generation. A well-established meta-heuristic algorithm is used to solve the constrained optimization problem. For demonstrating the effectiveness of the formulated constraints, two numerical examples are considered, in which Stephenson III path generator mechanisms are synthesized. It is found that the mechanisms synthesized using the proposed procedure are defect-free when constraints are imposed, which is verified using the stick-diagram.

METODE DAN PROSEDUR PELAKSANAAN REKRUTMEN SELEKSI PT. BANK RAKYAT INDONESIA (PERSERO) Tbk

ABSTRACT The purpose of this research is to explain about the method and procedure of rectification that has been used by BRI Tanjung Bumi Branch Unit. To provide an explanation of the understand i ng and characteristics of qualified employees according to the BRI Bumi Tanjung Branch Unit. The method used in this research is qualitative descriptive. With data collection techniques using interviews and documentation. The results of the study show that the Tanjung Bumi Branch BRI Unit uses internal and external recruitment methods using newspaper and internet media, with online registration for registration, recruitment procedures starting from field reports needed by employees, then to the directors, and human resources. There are two selection methods, namely administration selection method and management selection method, the selection procedure starts from the selection procedure of the Tanjung Bumi Branch BRI Unit starting from theoretical tests, practice tests, academic interviews, aptitude tests, directors interview tests, and finally health tests. Qualified employees are employees who are able to carry out tasks that are given and have skills, and are characterized by discipline, creative loyalty, working optimally, and having expertise.

Line-Based Geometric Consensus Rectification and Calibration From Single Distorted Manhattan Image

Recent advances in single image rectification and intrinsic calibration has been addressed by employing line information on the distorted image. The core issues of this technique are the separation of rectification and calibration procedures, and the suffering of geometric nonconformity. In this work, we propose a novel Geometric Consensus Rectification and Calibration algorithm, which we refer to as GCRC framework. We show how the geometric consensus rectification and calibration can be performed in a unified framework and solve the above issues. The proposed GCRC not only guarantees the geometrical consensus on the rectified images, but allows us to perform the robust intrinsic parameters estimation with the grouped circular arcs. Through “grouping by voting” in a unified framework, the geometric consensus rectification and calibration are robustly conducted on single distorted Manhattan images. Experiments on a number of distorted images, including the simulated YorkUrbanDB dataset, Panoramic Fisheye dataset, checkerboard image, and Internet images, demonstrate that the GCRC significantly improve the performance of geometrically consensus rectification and intrinsic parameters estimation. In particular, the GCRC shows relatively small variations with a different number of lines, which outperforms various previous approaches.

REDUCTION OF UNCERTAINTIES IN LASER STRIPE MEASUREMENT OF SOLID PARTICLES CONCENTRATION

Laser stripe measurement (LSM) is a relatively novel method for measuring a local concentration of coarse particles in a mixture with fluid. It is based on an analysis of camera records of the laser sheet penetration in to the mixture. We report on our measurements of the concentration of suspended particles in a fluidization cell and focus on the parameters affecting the evaluation procedure for the measured data. A high sensitivity of the measured concentration to the correction for the position of the wall and to the threshold brightness for data filtering is demonstrated. The uncertainty in the wall position is reduced by applying a rectification procedure based on an identification of the position of a laser stripe drawn at the wall of the fluidization cell. The main motivation for the presented study was to find guidelines for the determination of the threshold brightness, absence of which can be considered a serious weakness of the LSM when particles of non-ideal optical properties are tested. Histograms of the brightness of laser stripes drawn on a surface of suspended particles are analysed with the aim to find a connection between the histograms and the threshold brightness. The threshold brightness is shown to be proportional to a position of the second of the two peaks identified in a histogram. Based on the results of the analysis, a method is proposed for the determination of the threshold brightness.

Solar sail trajectory analysis with asymptotic expansion method

An analytical expression for the trajectory equation of a solar sail spacecraft is available in special cases only, including the well known logarithmic spiral. The latter, however, cannot be used when the parking orbit is circular. This paper presents an approximate solution to this problem, obtained by considering the propulsive acceleration as a perturbation effect acting on a Keplerian trajectory in a heliocentric (two-dimensional) mission scenario. In this context, the spacecraft dynamics are approximated by an asymptotic series expansion in terms of non-singular generalized orbital elements. Under the assumption that the propulsive acceleration is small compared to the local Sun's gravitational attraction, a first order approximation is shown to be very accurate in predicting the trajectory of the spacecraft and the evolution of the non-singular orbital parameters of the osculating orbit. A periodic rectification procedure improves the method accuracy without significantly affecting the computational time, as is confirmed by numerical simulations.