Journal articles: 'Recurrent Problems'

1

Haroun, Ansar M. "Recurrent Behavioral Problems in Children." Pediatric Annals 33, no. 5 (May 1, 2004): 282–84. http://dx.doi.org/10.3928/0090-4481-20040501-04.

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Kotov, S. V., N. D. Korochkin, and A. A. Klimenko. "Recurrent varicocele." Vestnik Urologii 9, no. 2 (July 10, 2021): 132–41. http://dx.doi.org/10.21886/2308-6424-2021-9-2-132-141.

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Varicocele is one of the most common problems in modern reproductive medicine. The incidence of varicocele in the structure of the general male population is 15%, 40% of which have problems with fertility. Among the causes of male infertility, varicocele ranks second after idiopathic, thus being the most common curable cause of male infertility. While researching the pathophysiological mechanisms of infertility in varicocele, the question of the reasons for the varicocele relapses, both after surgical and endovascular methods of treatment remains open, as well as the tactics of managing such patients. The review aimed to systematize knowledge about the problem of recurrent varicocele, to analyze the frequency and etiology of relapses after various methods of primary treatment, as well as to select the optimal diagnostic and treatment option for varicocele recurrence.

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Safwan Mahmood Al-Selwi, Mohd Fadzil Hassan, Said Jadid Abdulkadir, and Amgad Muneer. "LSTM Inefficiency in Long-Term Dependencies Regression Problems." Journal of Advanced Research in Applied Sciences and Engineering Technology 30, no. 3 (May 15, 2023): 16–31. http://dx.doi.org/10.37934/araset.30.3.1631.

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Recurrent neural networks (RNNs) are an excellent fit for regression problems where sequential data are the norm since their recurrent internal structure can analyse and process data for long. However, RNNs are prone to the phenomenal vanishing gradient problem (VGP) that causes the network to stop learning and generate poor prediction accuracy, especially in long-term dependencies. Originally, gated units such as long short-term memory (LSTM) and gated recurrent unit (GRU) were created to address this problem. However, VGP was and still is an unsolved problem, even in gated units. This problem occurs during the backpropagation process when the recurrent network weights tend to vanishingly reduce and hinder the network from learning the correlation between temporally distant events (long-term dependencies), that results in slow or no network convergence. This study aims to provide an empirical analysis of LSTM networks with an emphasis on inefficiency in long-term dependencies convergence because of VGP. Case studies on NASA’s turbofan engine degradation are examined and empirically analysed.

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Baron, Tara. "Case 1: A toddler with recurrent chest problems." Paediatrics & Child Health 8, no. 6 (July 1, 2003): 369–70. http://dx.doi.org/10.1093/pch/8.6.369.

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Costa, Janaina M. H., Henrique Rozenfeld, Creusa Sayuri Tahara Amaral, Ricardo M. Marcacinit, and Solange Oliveira Rezende. "Systematization of Recurrent New Product Development Management Problems." Engineering Management Journal 25, no. 1 (March 2013): 19–34. http://dx.doi.org/10.1080/10429247.2013.11431963.

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Borges, E., N. H. T. Lemes, and J. P. Braga. "Force field inverse problems using recurrent neural networks." Chemical Physics Letters 423, no. 4-6 (June 2006): 357–60. http://dx.doi.org/10.1016/j.cplett.2006.03.090.

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7

Rogowski, A. S. "Environmental Impact Assessment: Practical Solutions to Recurrent Problems." Journal of Environmental Quality 33, no. 2 (March 2004): 797. http://dx.doi.org/10.2134/jeq2004.7970.

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Malek, Alaeddin, and Najmeh Hosseinipour-Mahani. "Solving Multiextremal Problems by Using Recurrent Neural Networks." IEEE Transactions on Neural Networks and Learning Systems 29, no. 5 (May 2018): 1562–74. http://dx.doi.org/10.1109/tnnls.2017.2676046.

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Pikuza, O. I., E. V. Generalova, and F. F. Rizvanova. "Psychological problems of adolescents with recurrent respiratory infections." Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics) 62, no. 5 (January 1, 2017): 158–60. http://dx.doi.org/10.21508/1027-4065-2017-62-5-158-160.

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10

Bennett, Gary F. "Environmental Impact Assessment: Practical Solutions to Recurrent Problems." Journal of Hazardous Materials 107, no. 3 (March 2004): 145–46. http://dx.doi.org/10.1016/j.jhazmat.2003.12.004.

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11

Smout, André J. P. M. "The patient with GORD and chronically recurrent problems." Best Practice & Research Clinical Gastroenterology 21, no. 3 (June 2007): 365–78. http://dx.doi.org/10.1016/j.bpg.2007.01.007.

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Gauchan, Eva, Ganesh BK, and Deepak Prasad Koirala. "Variation in spirometry parameters in children with and without recurrent respiratory problems." Journal of Kathmandu Medical College 9, no. 3 (September 30, 2020): 130–36. http://dx.doi.org/10.3126/jkmc.v9i3.36413.

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Background: Children having recurrent episodes of respiratory symptoms account for a major source of hospitalization. These children have increased morbidities and if not identified in time can have impaired lung function as adults. Objectives: The aim of our study was to compare the spirometry parameters and bronchodilator reversibility in children with and without recurrent respiratory problems. Methodology: This was a prospective observational study conducted in the Pediatric department of Manipal Teaching Hospital comparing 35 children with recurrent respiratory problems and 35 children with no history of recurrent respiratory problems. After thorough instructions, baseline spirometry was done in all children and recordings were noted. Thereafter they were given two puffs of salbutamol (100 µg) and repeat testing was done 20 minutes later. Bronchodilator reversibility was calculated according to standard formula. Various statistical tests were used to compare the findings between the two groups. Results: The recurrent respiratory problem group had 31 (88%) cases of bronchial asthma, two (5.7%) bronchiolitis obliterans, one (2.8%) pulmonary eosinophilia, and one (2.8%) common variable immunodeficiency syndrome. The median values of FEV1 (p=<0.001), FVC (p=0.007), FEV1/FVC (p=0.005), PEF (p=0.042) and FEF25-75(p=0.026) were lower in the group with recurrent respiratory problems. Post-bronchodilator reversibility of FEV1 (p=0.001), FVC (p=<0.001) and FEF25-75 (p=0.026) was higher in the groups with recurrent respiratory problems Conclusion: We found that lung function parameters in children with recurrent respiratory problems show features of obstructive defect. The post-bronchodilator response is higher in the group with recurrent respiratory problems as compared to normal children.

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Tverdokhlebov, V. A. "Models of Functional Dependencies of Elements in Sequences for Solving Problems of Control and Management." Mekhatronika, Avtomatizatsiya, Upravlenie 20, no. 10 (October 10, 2019): 579–88. http://dx.doi.org/10.17587/mau.20.579-588.

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In paper developed version of the basic concepts, models and methods for the formulation and solution of problems of control and diagnosing of processes in systems, tasks of constructing models of processes in which the causal relationships of events are transformed into functional dependencies between elements in sequences, problems of formalizing of process control rules, etc. For this extended classical recurrent definition of the sequences, which presents the functional elements depending on the immediately preceding to them m elements to offered Z-recurrent definition, which defines the functional relationship between sets of elements in the sequence. The orders of Z-recurrent forms have the form of a set of numbers and are convenient for accurate and complete characterization of the connections of events in processes. The tasks of control, diagnosing, constructing new models of processes, assessing the complexity of processes and rules for managing processes can be formulated and solved using numerical indicators of Z-recurrent definitions. A classification of Z-recurrent definitions of sequences and a classification of processes are constructed, an algorithm for checking the feasibility of determining a Z-recurrent form for given sequences of form is developed. The Z-recurrent definition of sequence is complemented by the Z-recurrent sequence pattern method, which includes: introducing a linear order on the base set of sequence elements, constructing an image for the sequence in the form of a sequence of executing or non-executing relationships between the elements represented by a linear order, and applying Z-recurrent definitions to the constructed image of the sequence. The problem on which the solution of the considered problems is based is the recognition of two sequences by properties, which are determined by the indicators of Z-recurrent definitions of sequences, which have the form of orders of Z-recurrent forms. Sets of orders in executing or non-executing Z-recurrent forms characterize the sequences and the analyzed sets of sequences, which allows you to set and solve problems related to system management: problems of control and diagnosing of processes in the system, problems of constructing process models, problems of formalizing and complexity estimation of control rules of processes.

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Beresford, T., J. J. Smith, L. Brown, R. M. Greenhalgh, and A. H. Davies. "A comparison of health-related quality of life of patients with primary and recurrent varicose veins." Phlebology: The Journal of Venous Disease 18, no. 1 (March 1, 2003): 35–37. http://dx.doi.org/10.1258/026835503321236885.

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Aim: To determine whether recurrent varicose veins affect patient quality of life. The health-related quality of life (HRQL) scores of patients with recurrent varicose veins were compared with those of patients presenting with primary varicose vein disease. Methods: HRQL among patients attending outpatient appointments for recurrent and primary varicose veins was measured using the Aberdeen Varicose Vein Questionnaire (AVVQ) and the Short Form-36 General Health Survey (SF-36). Results: Questionnaires were given to 211 patients (150 primary, 61 recurrent), and 194 (133 primary, 61 recurrent) completed them. For the AVVQ, patients with recurrent varicose veins had significantly worse symptom scores compared with those with primary disease (24.87 ± 12.28 vs 17.77 ± 9.68, Mann-Whitney, P <0.01). The SF-36 recorded significantly worse HRQL (Mann-Whitney, P <0.05) for patients with recurrent varicose veins compared with those with primary varicose veins in all but one of the eight domains (role limitation attributed to emotional problems, RE, P = 0.073). Conclusion: Varicose vein recurrence is associated with a significantly worse HRQL than is found among patients with primary varicose veins.

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15

Laslett, Anne-Marie, Robin Room, and Paul Dietze. "Substance misuse, mental health problems and recurrent child maltreatment." Advances in Dual Diagnosis 7, no. 1 (March 5, 2014): 15–23. http://dx.doi.org/10.1108/add-11-2013-0026.

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Purpose – The purpose of this paper is to determine whether the diagnosis of both carers’ mental health problems and substance misuse increase the likelihood of recurrent child maltreatment over and above the individual effects of these factors. Design/methodology/approach – Retrospective secondary data analysis of 29,455 children where child maltreatment was confirmed in the Victorian child protection system between 2001 and 2005. Recorded mental health, alcohol misuse and other drug misuse variables were entered into multivariate logistic regression models predicting repeated child maltreatment. Interactions and a range of other child, carer and socio-economic factors were included in these models. Findings – Carer alcohol misuse, other drug misuse and mental ill health all independently predicted recurrent child maltreatment. The presence of both other drug misuse and mental ill health increased the likelihood that recurrent child abuse was recorded over the likelihood that mental health alone predicted recurrent child maltreatment, and while alcohol misuse had an effect when there was no mental health condition recorded it did not have an additional effect when there was evidence of mental health problems. Research limitations/implications – Children in families where there is both mental health problems and other drug use problems are at greater risk of repeated maltreatment than where there is evidence of mental health problems or other drug use alone. Where there was evidence of carer mental health problems, alcohol misuse did not add to this likelihood. However, the effect of mental health and other drug use was similar in size to the effect of alcohol misuse alone. Originality/value – These findings add to understandings of the effects of co-occurring mental health problems and substance misuse on recurrent child maltreatment and differentiate between cases that involve alcohol and other drug misuse.

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16

Abaeva, N. G., N. D. Vernigora, L. A. Safronenko, V. V. Karpov, M. G. Lukashevich, L. G. Disenbaeva, N. L. Shapranova, and E. M. Golovina. "Recurrent croup in children: problems and ways of their solution." Journal of Clinical Practice 9, no. 3 (December 10, 2018): 4–9. http://dx.doi.org/10.17816/clinpract0934-9.

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In this review, we analyse morbidity, anamnesis, clinical features, immunological status, catamnesis, treatment options and ways of prevention of acute and recurrent croup in children studied over the past four decades. Based on the accomplished analysis, we stipulate the need for conducting a scientific research on the recurrent croup problem, development of preventive methods and guidelines.

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17

Clark, D. A. "Intravenous immunoglobulin and idiopathic secondary recurrent miscarriage: methodological problems." Human Reproduction 26, no. 9 (June 24, 2011): 2586–87. http://dx.doi.org/10.1093/humrep/der185.

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18

Getliffe, K. "Managing recurrent urinary catheter blockage: Problems, promises, and practicalities." Journal of WOCN 30, no. 3 (May 2003): 146–51. http://dx.doi.org/10.1067/mjw.2003.120.

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19

Shikh, Shikh E. V., Lazareva N. B. Lazareva, Rebrova E. V. Rebrova, and Ryazanova A. Yu Ryazanova. "Modern pharmacotherapy for chronic recurrent cystitis: problems and opportunities." Akusherstvo i ginekologiia 7_2019 (August 2, 2019): 124–30. http://dx.doi.org/10.18565/aig.2019.7.124-130.

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20

Demidova, L. A. "Recurrent Neural Networks’ Configurations in the Predictive Maintenance Problems." IOP Conference Series: Materials Science and Engineering 714 (January 3, 2020): 012005. http://dx.doi.org/10.1088/1757-899x/714/1/012005.

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21

Rajasekaran, S., and G. A. Vijayalakshmi Pai. "Recurrent neural dynamic models for equilibrium and eigenvalue problems." Mathematical and Computer Modelling 35, no. 1-2 (January 2002): 229–40. http://dx.doi.org/10.1016/s0895-7177(01)00161-3.

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22

Drewett, M. S., and D. M. Burge. "Recurrent neonatal gastro-intestinal problems after spontaneous intestinal perforation." Pediatric Surgery International 23, no. 11 (September 8, 2007): 1081–84. http://dx.doi.org/10.1007/s00383-007-1999-2.

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23

Dreval, O. N., A. V. Kuznetsov, V. A. Chekhonatsky, A. V. Baskov, A. A. Chekhonatsky, and A. V. Gorozhanin. "Pathogenetic aspects and risk factors for recurrent lumbar disc herniation: literature review." Hirurgiâ pozvonočnika (Spine Surgery) 18, no. 1 (April 6, 2021): 47–52. http://dx.doi.org/10.14531/ss2021.1.47-52.

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One of the main causes of the development of debilitating pain syndrome after surgical treatment of a herniated disc is herniation recurrence. This pathology dictates the need to perform reoperation on an already operated segment of the spinal column, which complicates the technique of surgical intervention and negatively affects the relief of pain syndrome. In the presented review of scientific publications selected from the medical literature databases PubMed, E-library and Cochrane, the current problems of the pathogenesis of recurrent herniated discs in the lumbar spine are considered. The concept of risk factors for the development of recurrent disc herniation is highlighted, their characteristics are given, and the significance of each of them in the development of recurrent disc herniation is analyzed.

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Belova, K. Yu, O. B. Yershova, A. A. Degtyarev, M. V. Belov, V. O. Gerasimov, and S. Yu Fedotov. "REFRACTURE PREVENTION SYSTEM: FIRST RESULTS OF A PILOT PROGRAM WITHIN THE PROJECT «PROMETHEUS» IN YAROSLAVL." Osteoporosis and Bone Diseases 17, no. 2 (December 15, 2014): 3–6. http://dx.doi.org/10.14341/osteo201423-6.

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In order to reduce the incidence of recurrent fractures in patients that had already experienced low-energy (osteoporotic) fracture, the International Osteoporosis Foundation initiated the program «Capture the fracture». Established Best Practice Framework represents 13 standards to evaluate the effectiveness of the centers for the prevention of recurrent fractures, organized in different countries. In 2012 the Russian Association on Osteoporosis started the project PROMETHEUS [Creation the system to prevent recurrence of fractures in patients with osteoporosis]. In order to implement this program in the city of Yaroslavl we conducted a pilot project to establish a center for the prevention of recurrent fractures in patients who have received osteoporotic fracture. In this article we assess the effectiveness of the work of this center with the use of international standards, identify key problems and propose solutions.

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Balima, Serge-Théophile. "Communication for health in Africa: experiences and challenges." Comunicar 13, no. 26 (March 1, 2006): 21–26. http://dx.doi.org/10.3916/c26-2006-04.

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This paper analyzes communication for health in Africa through some fields experiences. These education compaigns show that the communication approaches are little participative. They don’t take into account the socio–cultural reality of local communities and then face various methodological problems. Yet, if well conducted, health oriented communication can help to reduce the impact of recurrent health problems in Africa. El presente artículo analiza la comunicación para la salud en África a través de algunas experiencias llevadas a cabo sobre el terreno. De estas campañas de educación se deduce que los enfoques de la comunicación son poco participativos. No integran la vivencia sociocultural de las poblaciones locales y se topan con una serie de dificultades de orden metodológico. Sin embargo la comunicación para la salud, bien enfocada, puede lograr reducir el impacto de los problemas de salud recurrentes en el continente.

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Palareti, Gualtiero. "Recurrent Venous Thromboembolism: What Is the Risk and How to Prevent It." Scientifica 2012 (2012): 1–17. http://dx.doi.org/10.6064/2012/391734.

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Venous thromboembolism (VTE) that includes deep vein thrombosis and/or pulmonary embolism is a frequent, severe, and potentially lethal disease. After a first episode, VTE has a strong tendency to recur. While VTE is an acute disease, it may have variable outcomes in early and late phases after initial presentation. Furthermore, the incidence of late, clinically important consequences (postthrombotic syndrome and/or chronic thromboembolic pulmonary hypertension) increases in case of recurrent events. The aims of the present review are (i) to analyze the incidence and risk factors for recurrence of VTE (either those related to the type of first thrombotic event or to the patients), the risks associated with occurrence of recurrent events, and the problems linked to the diagnosis, not always easy, of recurrent events; (ii) to discuss whether or not it is possible to predict the individual risk of recurrence after a first event, by stratifying patients at high or low risk of recurrence, and how this can influence their treatment; (iii) to comment what the current guidelines and guidance suggest/recommend about anticoagulant treatment after a first VTE event and, finally, to propose practical indications on how to manage individual patients affected by VTE.

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Xu, Dongkuan, Wei Cheng, Xin Dong, Bo Zong, Wenchao Yu, Jingchao Ni, Dongjin Song, Xuchao Zhang, Haifeng Chen, and Xiang Zhang. "Multi-Task Recurrent Modular Networks." Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 12 (May 18, 2021): 10496–504. http://dx.doi.org/10.1609/aaai.v35i12.17256.

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We consider the models of deep multi-task learning with recurrent architectures that exploit regularities across tasks to improve the performance of multiple sequence processing tasks jointly. Most existing architectures are painstakingly customized to learn task relationships for different problems, which is not flexible enough to model the dynamic task relationships and lacks generalization abilities to novel test-time scenarios. We propose multi-task recurrent modular networks (MT-RMN) that can be incorporated in any multi-task recurrent models to address the above drawbacks. MT-RMN consists of a shared encoder and multiple task-specific decoders, and recurrently operates over time. For better flexibility, it modularizes the encoder into multiple layers of sub-networks and dynamically controls the connection between these sub-networks and the decoders at different time steps, which provides the recurrent networks with varying degrees of parameter sharing for tasks with dynamic relatedness. For the generalization ability, MT-RMN aims to discover a set of generalizable sub-networks in the encoder that are assembled in different ways for different tasks. The policy networks augmented with the differentiable routers are utilized to make the binary connection decisions between the sub-networks. The experimental results on three multi-task sequence processing datasets consistently demonstrate the effectiveness of MT-RMN.

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Mooney, Kathleen A., and Christine A. Padesky. "Applying Client Creativity to Recurrent Problems: Constructing Possibilities and Tolerating Doubt." Journal of Cognitive Psychotherapy 14, no. 2 (January 2000): 149–61. http://dx.doi.org/10.1891/0889-8391.14.2.149.

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Cognitive therapists are encouraged to work with underlying assumptions rather than core beliefs when helping clients with recurrent problems. The importance of engaging client creativity to solve recurrent problems is emphasized along with three central themes: construction of new possibilities, a persistent focus on the new underlying assumptions rather than the old, and tolerance for ambiguity and doubt. A detailed case example is presented to demonstrate this approach. Also, the use of cultural or personal icons to enhance client creativity is illustrated.

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Winarta, Gede Kesuma, and Ida Bagus Made Suryawisesa. "Pitfall management of dermatofibrosarcoma protuberans on right leg." International Journal of Research in Medical Sciences 7, no. 9 (August 27, 2019): 3586. http://dx.doi.org/10.18203/2320-6012.ijrms20193954.

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Dermatofibrosarcoma protuberans (DFSP) is a rare, locally invasive soft tissue sarcoma. The local recurrence rate is high, in some studies upwards of 60%, likely reflecting a failure to remove occult extensions of tumor. Surgical excision has been the treatment of choice for the resection of DFSP. Any pitfall on management therapy of DFSP not only increase the recurrence rate but also add new problems to patients with DFSP. 58-year-old male patient, came with a local recurrent of DFSP on his right leg. Then performed excision with margin one centimetre, and closing defect using pedicle sural flap, durante surgery turned pedicle on the flap is too short and because of poor soft tissue handling pedicle was injured. It consulted into the vascular division for evaluated and treatment pedicle. Postoperative evaluation, the flap experiences bluish due to vascularization compromised. It was decided to expose the flap and the defect was covered with skin graft. 2 months postoperative evaluation found local recurrent on skin graft area. Excision margins between 2 to 5 cm can reduce the recurrence rate. Proper planning in designing flaps to cover defects and the ability of good soft tissue handling is required to avoid new problems on management DFSP.

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Zuckerman, Barry, James Stevenson, and Veira Bailey. "Stomachaches and Headaches in a Community Sample of Preschool Children." Pediatrics 79, no. 5 (May 1, 1987): 677–82. http://dx.doi.org/10.1542/peds.79.5.677.

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The epidemiology of recurrent stomachache and headache was studied in a community sample of 308 preschool children, most of whom were white. When the children were 3 years old, interviews with their mothers indicated that 3% had recurrent headaches and 9% had recurrent stomachaches. Children with recurrent stomachaches were more likely than those without recurrent stomachaches to have mothers who were emotionally depressed (P < .01), had marital problems (P < .05), and perceived their own health as poor (P < .05). When maternal poor health was controlled, depression was still associated with their children having stomachaches (P < .05). Prospectively collected data demonstrate that children with recurrent stomachaches did not have bowel difficulties when they were infants. Other psychosocial stresses and demographic factors were not associated with stomachaches. The only variable associated with recurrent headache was maternal depression. Children with recurrent headaches or stomachaches were more likely to have behavior problems, as measured by the Behavior Screening Questionnaire, than were children without these symptoms. The analysis presents new data on these common symptoms of childhood.

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Levine, Edward A. "Problems of Success and Problems of Failure: Recurrent Disease After Cytoreductive Surgery and Intraperitoneal Chemoperfusion." Annals of Surgical Oncology 11, no. 4 (April 2004): 351–53. http://dx.doi.org/10.1245/aso.2004.10.928.

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32

Stephenson, M. D., C. Liao, W. H. Kutteh, and C. Librach. "Reply: Intravenous immunoglobulin and idiopathic secondary recurrent miscarriage: methodological problems." Human Reproduction 26, no. 9 (June 24, 2011): 2587–88. http://dx.doi.org/10.1093/humrep/der186.

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Featherstone, Harvey J. "Medical Diagnoses and Problems in Individuals With Recurrent Idiopathic Headaches." Headache: The Journal of Head and Face Pain 25, no. 3 (May 1985): 136–40. http://dx.doi.org/10.1111/j.1526-4610.1985.hed2503136.x.

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34

Kelmanson, Igor A. "Recurrent respiratory infections and psychological problems in junior school children." Early Child Development and Care 185, no. 9 (January 22, 2015): 1437–51. http://dx.doi.org/10.1080/03004430.2014.1002970.

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35

Jayadeva, Kamlesh Kumar Pathak, and Arindam Chakraborthy. "Recurrent Neural Networks with Nonlinear Synapses for Solving Optimization Problems." IETE Journal of Research 49, no. 2-3 (March 2003): 197–209. http://dx.doi.org/10.1080/03772063.2003.11416337.

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Crowley, Claire K., and Jill Gunn. "Impact assessment: practical solutions to recurrent problems and contemporary challenges." Impact Assessment and Project Appraisal 32, no. 3 (June 18, 2014): 252–53. http://dx.doi.org/10.1080/14615517.2014.929344.

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37

Lawrence, David P. "Environmental impact assessment: Practical solutions to recurrent problems, part 1." Environmental Quality Management 14, no. 4 (2005): 39–62. http://dx.doi.org/10.1002/tqem.20057.

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Lawrence, David P. "Environmental impact assessment: Practical solutions to recurrent problems, Part 2." Environmental Quality Management 15, no. 1 (2005): 27–51. http://dx.doi.org/10.1002/tqem.20066.

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39

Smith, Anthony W., and David Zipser. "LEARNING SEQUENTIAL STRUCTURE WITH THE REAL-TIME RECURRENT LEARNING ALGORITHM." International Journal of Neural Systems 01, no. 02 (January 1989): 125–31. http://dx.doi.org/10.1142/s0129065789000037.

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Recurrent connections in neural networks potentially allow information about events occurring in the past to be preserved and used in current computations. How effectively this potential is realized depends on the power of the learning algorithm used. As an example of a task requiring recurrency, Servan-Schreiber, Cleeremans, and McClelland1 have applied a simple recurrent learning algorithm to the task of recognizing finite-state grammars of increasing difficulty. These nets showed considerable power and were able to learn fairly complex grammars by emulating the state machines that produced them. However, there was a limit to the difficulty of the grammars that could be learned. We have applied a more powerful recurrent learning procedure, called real-time recurrent learning2,6 (RTRL), to some of the same problems studied by Servan-Schreiber, Cleeremans, and McClelland. The RTRL algorithm solved more difficult forms of the task than the simple recurrent networks. The internal representations developed by RTRL networks revealed that they learn a rich set of internal states that represent more about the past than is required by the underlying grammar. The dynamics of the networks are determined by the state structure and are not chaotic.

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Bezrukov, O. F. "SURGERY OF THYROID GLAND: OBJECTS AND UNSOLVED PROBLEMS." Grekov's Bulletin of Surgery 174, no. 1 (February 28, 2015): 73–74. http://dx.doi.org/10.24884/0042-4625-2015-174-1-73-74.

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The author considers the problems for surgeons such as maintenance of trachea and the esophagus integrity, bleeding prophylaxis, damage prevention of recurrent nerves and parathyroid glands. The article proposed the measures of the edematous syndrome prevention in early postoperative period.

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WANG, JUN. "ON THE ASYMPTOTIC PROPERTIES OF RECURRENT NEURAL NETWORKS FOR OPTIMIZATION." International Journal of Pattern Recognition and Artificial Intelligence 05, no. 04 (October 1991): 581–601. http://dx.doi.org/10.1142/s0218001491000338.

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Asymptotic properties of recurrent neural networks for optimization are analyzed. Specifically, asymptotic stability of recurrent neural networks with monotonically time-varying penalty parameters for optimization is proven; sufficient conditions of feasibility and optimality of solutions generated by the recurrent neural networks are characterized. Design methodology of the recurrent neural networks for solving optimization problems is discussed. Operating characteristics of the recurrent neural networks are also presented using illustrative examples.

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Sahin, Suzan, and Sirin Menekse. "Recurrent Nocardial Brain Abscess Developing in an Immunocompetent Patient, A Case Report." Infectious Diseases and Clinical Microbiology 4, no. 4 (December 21, 2022): 280–84. http://dx.doi.org/10.36519/idcm.2022.160.

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Central nervous system nocardiosis is rare but has high morbidity and mortality. Immunocompromised patients who have malignancies such as lymphoma, infections such as human immunodeficiency virus (HIV), and bone marrow or solid organ recipients are particularly vulnerable to infection. However, here, we present a patient who developed nocardiosis and recurrent brain abscesses despite having no immunodeficiency problems. The abscess recurred despite total abscess excision and parenteral therapy. After nocardiosis was diagnosed, intravenous treatment with imipenem and amikacin was initiated. The patient was discharged on oral doxycycline. In our immunocompetent case, the abscess recurred four times, resulting in death. Keywords: nocardiosis, brain abscesses, immunocompetent

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Kettunen, Pirjo, Eeva Koistinen, and Jukka Hintikka. "The Connections of Pregnancy-, Delivery-, and Infant-Related Risk Factors and Negative Life Events on Postpartum Depression and Their Role in First and Recurrent Depression." Depression Research and Treatment 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2514317.

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Introduction. The aim of this study is to assess how negative life events and adverse experiences with pregnancy, delivery, the infant(s), and breastfeeding cessation impact on postpartum depression (PPD), specifically in first lifetime and recurrent depression. Method. The study group comprised 104 mothers with a current episode of PPD and a control group of 104 mothers who did not have current PPD. The Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I) was used for data collection. The course of the depression, adverse experiences, and breastfeeding were assessed by self-reports. Results. In age-adjusted multivariate analyses, mental and physical problems during pregnancy or delivery, postpartum problems with the infant and breastfeeding cessation, and negative life events during the previous 12 months were associated with postpartum depression. Eighteen percent (18%) of the mothers had first depression and 82% recurrent depression. Mental and physical problems during pregnancy or delivery were associated with both first lifetime and recurrent depression. Nevertheless, negative life events and infant/breastfeeding issues associated only with recurrent depression. Conclusion. Factors associated with pregnancy and delivery have an impact on PPD, but in recurrent depression other postnatal and psychosocial factors are also important risk factors.

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Hannerz, Jan. "Recurrent Tolosa-Hunt Syndrome." Cephalalgia 12, no. 1 (February 1992): 45–51. http://dx.doi.org/10.1046/j.1468-2982.1992.1201045.x.

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Twenty consecutive patients with recurrent Tolosa-Hunt syndrome were studied. One had a parent who suffered from recurrent Tolosa-Hunt syndrome. Thirty-three percent of the patients had also recurrent periods of weeks to months of unilateral periorbital pain without ophthalmoplegia. One patient had cluster headache before the Tolosa-Hunt syndrome started. Some patients had involvement of cranial nerves outside the cavernous sinus region during Tolosa-Hunt syndrome and also between episodes. The same systemic symptoms, i.e. back pain, cold feet, arthralgia, gut problems, varices, vertigo, chronic fatigue, thrombophlebitis, memory deficiency and signs of inflammation in serum, occurred in Tolosa-Hunt syndrome as earlier found in patients with orbital venous vasculitis. Seventy-three percent of the patients had pathologic orbital phlebograms. All patients treated with steroids reacted promptly; four who developed chronic pain syndromes were treated satisfactorily with azathioprine.

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Alam, Muhammad S., AKM B. Hossain, and Farhan B. Mohamed. "Performance Evaluation of Recurrent Neural Networks Applied to Indoor Camera Localization." International Journal of Emerging Technology and Advanced Engineering 12, no. 8 (August 2, 2022): 116–24. http://dx.doi.org/10.46338/ijetae0822_15.

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Researchers in robotics and computer vision are experimenting with the image-based localization of indoor cameras. Implementation of indoor camera localization problems using a Convolutional neural network (CNN) or Recurrent neural network (RNN) is more challenging from a large image dataset because of the internal structure of CNN or RNN. We can choose a preferable CNN or RNN variant based on the problem type and size of the dataset. CNN is the most flexible method for implementing indoor localization problems. Despite CNN's suitability for hyper-parameter selection, it requires a lot of training images to achieve high accuracy. In addition, overfitting leads to a decrease in accuracy. Introduce RNN, which accurately keeps input images in internal memory to solve these problems. Longshort-term memory (LSTM), Bi-directional LSTM (BiLSTM), and Gated recurrent unit (GRU) are three variants of RNN. We may choose the most appropriate RNN variation based on the problem type and dataset. In this study, we can recommend which variant is effective for training more speedily and which variant produces more accurate results. Vanishing gradient issues also affect RNNs, making it difficult to learn more data. Overcome the gradient vanishing problem by utilizing LSTM. The BiLSTM is an advanced version of the LSTM and is capable of higher performance than the LSTM. A more advanced RNN variant is GRU which is computationally more efficient than an LSTM. In this study, we explore a variety of recurring units for localizing indoor cameras. Our focus is on more powerful recurrent units like LSTM, BiLSTM, and GRU. Using the Microsoft 7-Scenes and InteriorNet datasets, we evaluate the performance of LSTM, BiLSTM, and GRU. Our experiment has shown that the BiLSTM is more efficient in accuracy than the LSTM and GRU. We also observed that the GRU is faster than LSTM and BiLSTM

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Shirai, Katsuyuki, Michael R. Siedow, and Arnab Chakravarti. "Antiangiogenic Therapy for Patients with Recurrent and Newly Diagnosed Malignant Gliomas." Journal of Oncology 2012 (2012): 1–12. http://dx.doi.org/10.1155/2012/193436.

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Malignant gliomas have a poor prognosis despite advances in diagnosis and therapy. Although postoperative temozolomide and radiotherapy improve overall survival in glioblastoma patients, most patients experience a recurrence. The prognosis of recurrent malignant gliomas is dismal, and more effective therapeutic strategies are clearly needed. Antiangiogenesis is currently considered an attractive targeting therapy for malignant gliomas due to its important role in tumor growth. Clinical trials using bevacizumab have been performed for recurrent glioblastoma, and these studies have shown promising response rates along with progression-free survival. Based on the encouraging results, bevacizumab was approved by the FDA for the treatment of recurrent glioblastoma. In addition, bevacizumab has shown to be effective for recurrent anaplastic gliomas. Large phase III studies are currently ongoing to demonstrate the efficacy and safety of the addition of bevacizumab to temozolomide and radiotherapy for newly diagnosed glioblastoma. In contrast, several other antiangiogenic drugs have also been used in clinical trials. However, previous studies have not shown whether antiangiogenesis improves the overall survival of malignant gliomas. Specific severe side effects, difficult assessment of response, and lack of rational predictive markers are challenging problems. Further studies are warranted to establish the optimized antiangiogenesis therapy for malignant gliomas.

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Balokhina, Svetlana, and Olga Mironenko. "Problems of regulating the quality of medical care in recurrent depression." Vestnik of Saint Petersburg University. Medicine 15, no. 1 (2020): 79–84. http://dx.doi.org/10.21638/spbu11.2020.108.

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Due to the increasing prevalence of depression, it is necessary to improve medical care to manage the disease. The problems of regulation of medical care quality are analyzed in the article. It is established that the problems are connected both with the general economic condition of Russia, and with the problems in regulation of activity. The second group of problems includes the absence of approved clinical recommendations, mixing of different nosologies in the Standards and Criteria of quality, incomplete set of examinations necessary for patients with depression. Further economic development and approval of the Clinical Guidelines should improve the quality and availability of care for depressed patients.

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Kim, Yong Guk, Joo Chul Yang, and Tae Wan Kim. "Risk Factors for Recurrence of Disc Herniation After Single-Level Lumbar Discectomy." Asian Journal of Pain 7 (July 26, 2021): 1. http://dx.doi.org/10.35353/ajp.2021.00003.

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Objective: Herniated nucleus pulposus is a common disease of the lumbar spine. Recurrence of disc herniation and subsequent disc degeneration are the most common problems following discectomy. Many first-time lumbar discectomy patients experience favorable outcomes; however, same-level recurrent discectomy can occasionally induce unfavorable results. Therefore, in this study, we retrospectively analyzed the risk factors for recurrence of lumbar disc herniation after discectomy.Methods: From January 2013 to December 2015, 226 patients underwent one-level discectomy in our department. We excluded patients with less than two years of follow-up, a previous spine deformity with a compression fracture, foraminal or extraforaminal discs, or a history of previous lumbar operation history, leaving 71 selected patients. Patients were divided into recurrent and non-recurrent groups and various factors were retrospectively compared between the groups.Results: Patients with preoperative disc space narrowing experienced recurrence less commonly; however, this was not statistically significant (10.0% and 25.5%, respectively; p=0.150). A disc height decrease of more than 20% during the follow-up period was a statistically significant risk factor for recurrence (36.4% and 14.3%, respectively; p=0.035), and grades 3 and 4, compared to grades 1 and 2, facet joint degeneration were also statistically significant risk factors for recurrence of disc herniation (41.2% and 14.8%, respectively; p=0.020).Conclusion: Patients who underwent more than a moderate degree of preoperative facet joint degeneration on the operated side and for whom the progression of disc space height decreased during the follow-up period may require closer observation for recurrence of disc herniation.

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Singh, Hardeep, Ankit Jain, Sanjay Mahendru, and Rakesh Kumar Khazanchi. "Hatchet Thigh Flap with Hemi-gluteus Flap for Recurrent Ischial Sore Reconstruction." Journal of Wound Management and Research 16, no. 3 (October 31, 2020): 158–63. http://dx.doi.org/10.22467/jwmr.2020.01172.

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Background: Ischial pressure sores are the most challenging sores to treat because of associated bursa and high rate of recurrence. Reconstruction flaps originating in the thigh have a disadvantage as movement may increase shear forces, and tension during closure may lead to wound dehiscence. To circumvent these problems, we hereby present a hatchet thigh flap with good mobility, which can be used for recurrent cases as well.Methods: All patients treated at our hospital in the last 5 years for ischial pressure sores were included in the study. The flap is elevated in the subfascial plane from lateral to medial until the medial circumflex artery perforators are revealed. In recurrent cases the lower half of the gluteus maximus muscle is used to fill in the cavity while the flap from the previous surgery is re-advanced.Results: Sixteen patients (11 males and five females) were in the study. The median age of the patient was 54 years (range, 25–82 years). All the flaps survived fully. Two patients had recurrence at three sites, which were successfully reconstructed by advancing the same flap and hemi-gluteus muscle. An average of 6 months follow-up after surgery for recurrence showed stable reconstruction.Conclusion: The hatchet thigh flap is easy to dissect and reliable for ischial pressure sores. It can be used effectively in recurrent cases when combined with hemi-gluteus flaps.

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Kimura, Keisuke, Takayuki Kimura, Takefumi Hiraguri, and Kenya Jin’no. "Effective Method for Wind and Solar Power Grid Systems Based on Recurrent Neural Networks." Journal of Advanced Computational Intelligence and Intelligent Informatics 18, no. 6 (November 20, 2014): 1034–43. http://dx.doi.org/10.20965/jaciii.2014.p1034.

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In this paper, the control method based on recurrent neural networks is proposed for optimizing large-scale wind and solar power generation systems. Recently, an optimal control method based on recurrent neural networks was proposed for wind and solar power generation systems. In this method, optimization problems are regarded as linear programming problems, which are solved by recurrent neural networks. Results suggest that this control method based on recurrent neural networks could be implemented in realworld systems. However, only small power generation systems were used to evaluate this control method in previous studies. Then, the method for power generation systems is evaluated by more realistic conditions. The results of our numerical experiments show that this control method delivers high performance with large-scale power generation systems. Furthermore, if the power generation systems has specific topologies, almost 20%of the supplying capacity is improved.

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Journal articles on the topic 'Recurrent Problems'

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