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2021 ◽  
Vol 8 ◽  
Author(s):  
Wenying Zhang ◽  
Jing Liu ◽  
Qiongwei Wu ◽  
Yu Liu ◽  
Chunchun Wang ◽  
...  

Background: In this study, a modified technique of resectoscopic slicing with a common bipolar loop was introduced, which facilitated the complete removal of the submucous fibroid inside the uterine cavity without any novel equipment.Results: Compared with the classical technique, our modified procedure possessed a shorter operation time (22.9 ± 7.3 vs. 38.9 ± 13.0 min, p < 0.05) and a smaller distending media volume (1,495.6 ± 540.1 vs. 2,393.1 ± 719.4 ml, p < 0.01).Conclusion: As a result, the current study suggested that the enucleation of submucous fibroid under hysteroscopy could be achieved by using only the bipolar loop, which reduced the consumption for novel equipment and enhanced the safety of the technique.


2021 ◽  
Vol 11 (5) ◽  
pp. 605-613
Author(s):  
Mohamed Jarjar ◽  
Said Hraoui ◽  
Said Najah ◽  
Khalid Zenkouar

This document traces the development of a new cryptosystem using two circuits ensured by a deep Vigenere classical technique improvement. This new technique employs several dynamic substitutions matrices attached to chaotic replacement functions; whose construction will be detailed. The first round will start by modifying the seed pixels based on the initial values calculated from the original image, and will be infected through the chaotic map used to overcome the uniform image problem, followed by the injection of Vigenere technology improvements. The output vector will be subdivided into three sized blocks for future application of deeply improved genetic mutations to better adapt to medicine and color image encryption. The second round will increase the complexity of the attack and improve the installed systems. Simulations performed on a large number of images of different sizes and formats ensure that our approach is not exposed to known attacks.


Author(s):  
SÜLEYMAN CAMGÖZ ◽  
Serap DİKER ◽  
Betül GÜVEN AYTAÇ ◽  
İsmail Aytaç

Background: The widespread use of ultrasonography in peripheral nerve blocks requires an assistant. Pappin et al. described the “Jedi grip” technique in which the practitioner works alone by controlling the ultrasound prob with one hand and the needle and injector with the other. In this study, we aimed to compare the block characteristics of the “Jedi grip” technique with the classical technique that performed with an assistant. Methods: 78 patients were included in our study. They were randomly divided into two groups (Group I: Jedi grip and Group II: Classical grip technique). Local anesthetic was applied to both groups from 10 ml of 0.5% bupivacaine +10 ml of 2% prilocaine mixture. The block characteristics were evaluated and recorded every 5 minutes for the first 30 minutes after each block. When the sensory block score was 7 and the total score was 14 or above, the block was considered successful, and the patient was ready for surgery. Results: There was no significant difference between the groups in terms of block characteristics such as block pain, number of attempts, arterial puncture, sensory and motor block onset and regression times, time to be ready for surgery, tourniquet pain, use of additional anesthesia method, use of postoperative analgesia. The duration of block application was 158±47 sec in the Jedi group and 121±83 sec in the control group. Conclusion: The Jedi grip technique has been found to be applicable with the same confidence compared to the classical method in terms of block success and complications.


Author(s):  
О.V. Khaliavinskaya ◽  
◽  
V.L. Krasilnikava ◽  

Purpose. To study of effectivity and safety the proposed method phacoemulsification cataract of patients with close-angle glaucoma. Methods. Under control was 76 patients (76 eyes) with different degree of tubidity of lens and close-angle glaucoma. Was allocated 3 clinical's groops: I patients with cataract and who was operated close-angle glaucoma, II patients with with cataract and not operated glaucoma, III control group. Results. Patients of I and II clinical group phacoemulsification cataract was carried out by the proposed method. In control group phacoemulsification was carried out by the classical technique. Ophtalmological examination was performed before surgery, on the first day after surgery and by the all period of staying in the hospital. Observation period – 6 months. Conclusion. Тhe proposed method allows to perform the phacoemulsification cataract of patients with close-angle glaucoma with shallow anterior camera and posterior synechiae. Authentically can say, that level of intoocular pressure in 1 and 2 groups dropped on 38% and 37%, in control group this index compose 23%. When performing an operation by the proposed method managed to reduce the proportion of inraoperative complications on 34%. The proposed method easy to performed and safe. Key words: close-angle glaucoma, cataract, phacoemulsification cataract, angle anterior camera, posterior synechiae, anterior camera.


Author(s):  
Jeow Li Huan ◽  
Arif Ahmed Sekh ◽  
Chai Quek ◽  
Dilip K. Prasad

AbstractText classification is one of the widely used phenomena in different natural language processing tasks. State-of-the-art text classifiers use the vector space model for extracting features. Recent progress in deep models, recurrent neural networks those preserve the positional relationship among words achieve a higher accuracy. To push text classification accuracy even higher, multi-dimensional document representation, such as vector sequences or matrices combined with document sentiment, should be explored. In this paper, we show that documents can be represented as a sequence of vectors carrying semantic meaning and classified using a recurrent neural network that recognizes long-range relationships. We show that in this representation, additional sentiment vectors can be easily attached as a fully connected layer to the word vectors to further improve classification accuracy. On the UCI sentiment labelled dataset, using the sequence of vectors alone achieved an accuracy of 85.6%, which is better than 80.7% from ridge regression classifier—the best among the classical technique we tested. Additional sentiment information further increases accuracy to 86.3%. On our suicide notes dataset, the best classical technique—the Naíve Bayes Bernoulli classifier, achieves accuracy of 71.3%, while our classifier, incorporating semantic and sentiment information, exceeds that at 75% accuracy.


2021 ◽  
Vol 18 (3) ◽  
pp. 77-85
Author(s):  
I. A. Eliseenko ◽  
S. G. Struts ◽  
V. V. Stupak

Objective. To assess the effect of neodymium laser radiation on the recurrence rate and continued growth of primary extramedullary tumors on the basis of clinical data obtained in the long-term follow-up period in operated patients with extramedullary tumors.Material and Methods. The long-term results of surgical treatment of two groups of patients (n = 412) with primary extramedullary tumors operated on from 1998 to 2014 were studied and systematized. Patients of comparison group (n = 277; 67.2 %) underwent removal of tumors using standard microsurgical techniques, and the neoplasms in patients of the study group (n = 135; 32.8 %) were removed with additionally used neodymium (Nd:YAG) laser.Results. The use of the developed laser technologies for the resection of extramedullary intracanal primary tumors made it possible to reliably reduce the relative number of recurrence and continued growth from 11.1 % to 1.2% compared with patients treated with standard surgery methods. The proportion of recurrences was 3.5 %, all of them were detected only in the group with the classical technique of tumor resection (p <0.01).Conclusion. The use of a neodymium laser as an additional technology to the classical microsurgical resection of extramedullary tumors is effective for the prevention of their recurrence and continued growth.


Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4952
Author(s):  
Bane Popadic ◽  
Boris Dumnic ◽  
Dragan Milicevic ◽  
Luka Strezoski ◽  
Natasa Petrovic

The most important element of the new active distribution system concept is the grid connected converter that needs to offer fault ride through capabilities. The new system topologies require new tools for fault state calculation that would consider different control methodologies. In that regard, this paper investigates the initial response of the grid connected inverter under fault that operates using new control methodology based on the integration of the delay signal cancellation. Using modern laboratory setup for testing of renewable energy sources and their integration in the power system the technique is weighed against the classical technique that does not provide the adequate control under unbalanced faults. Furthermore, through a set of specific experiments the paper demonstrates the behavior of the converter under fault, preparing the outline for the fault response modeling of distributed energy resources. Experimental results present the sub-transient period and the transient period of the response, giving the attention to the inrush current (initial peak current) of the converter. It has been shown that the new technique has similar behavior as the classical control for the balanced faults (symmetrical voltage states), while the values of the peak current for different type of unbalanced faults (asymmetrical voltages where classical technique can be proven to be ineffective) has also been demonstrated.


2021 ◽  
pp. 44-62
Author(s):  
Stefan Behrens ◽  
Allison N. Miller ◽  
Matthias Nagel ◽  
Peter Teichner

‘The Schoenflies Theorem after Mazur, Morse, and Brown’ provides two proofs of the Schoenflies theorem. The Schoenflies theorem states that every bicollared embedding of an (n – 1)-sphere in the n-sphere splits the n-sphere into two balls. This chapter provides two proofs. The first is due to Mazur and Morse; it utilizes an infinite ‘swindle’ and a classical technique called push-pull. The second proof, due to Brown, serves as an introduction to shrinking, or decomposition space theory. The latter is a beautiful, but outmoded, branch of topology that can be used to produce non-differentiable homeomorphisms between manifolds, especially from a manifold to a quotient space. Techniques from decomposition space theory are essential in the proof of the disc embedding theorem.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bolatbek Dossanov ◽  
Vitaliy Trofimchuk ◽  
Vassiliy Lozovoy ◽  
Sergey Khmyzov ◽  
Assem Dossanova ◽  
...  

AbstractThe work aimed to evaluate the effectiveness of the developed distraction system based on the rod external monolateral fixation mechanisms by comparing it with the classical technique of long tubular bones distraction based on the circular multi-axial system. The study included patients with a genetically confirmed diagnosis of achondroplasia. The experimental group consisted of 14 patients who underwent surgical limb lengthening by the rod monolateral external fixator with a distraction system developed by the authors. The lengthening was performed on 28 segments of tubular bones. The majority of the experimental group patients achieved the lengthening value close to the planned one and the deformation correction. The fixation period was averagely 83.8 ± 3.7 days, the regenerate length was 8.5 ± 0.6 cm, and the mechanical strength of the distraction regenerate was 10.3° ± 2.18°. The rod external fixator with a control distraction system developed by the authors has small dimensions and low weight of the external supporting elements of high durability. It is reported to provide a good psychological tolerance of the treatment process and significantly outperforms the circular multi-axis system. Considering the aforementioned, the proposed apparatus can grant good orthopedic care to patients with achondroplasia.


Author(s):  
Mustafa G. Mujtaba ◽  
Tara Baliban ◽  
Jamini Bhagu ◽  
Michael Herrera

The Ouchterlony double immunodiffusion assay is a serological technique used in the detection of antibodies and antigens for diagnostic purposes and also used in immunology laboratory courses as a common teaching assay where students observe the geometrical precipitation line patterns that form in the agarose, elucidating degrees of homology between antigens. In this classical technique, students must wait several hours to days to obtain results when protein antigens and antibodies are used.


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