Journal articles: 'Threshold repair'

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Sun, Mingjuan, Qinglai Dong, and Zihan Gao. "An Imperfect Repair Model with Delayed Repair under Replacement and Repair Thresholds." Mathematics 10, no. 13 (June 28, 2022): 2263. http://dx.doi.org/10.3390/math10132263.

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Based on the extended geometric process, a repair replacement model of a degradation system is studied, in which the delayed repair time depends on the working time after the last repair. Replacement and repair thresholds describe when the system will be replaced and when the system can be repaired, respectively. Two kinds of replacement policies are studied. One policy is jointly determined by the moment of the Nth failure and the first hitting time of the working time after the last repair for the replacement threshold, and the system is replaced, whichever occurs first; the other is the special case of the first policy, and the system is replaced when the working time after the last repair first hits the replacement threshold. The exact expressions of the long-run average cost rate are obtained. The optimal policies exist and can be ascertained by numerical methods. Finally, numerical examples are presented to demonstrate the application of the results obtained in the paper.

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RANGAN, A., and V. ARUNACHALAM. "A THRESHOLD MODEL FOR CELL SURVIVAL." International Journal of Biomathematics 02, no. 02 (June 2009): 119–27. http://dx.doi.org/10.1142/s1793524509000625.

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This paper deals with a threshold model for gene damages in a cell subject to repair. The damages and repairs are considered to be stochastic events. The status of the cell is partitioned into a number of states representing the number of proliferative gene damages it has suffered. The probability of finding the cell with a certain number of gene damages at any time and the expected number of repairs in an arbitrary interval are obtained.

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Guo, Ting Liang, and Zhao Xing Han. "Repairing Surface Fatigue Damage of the Metal Material by Heat Treatment." Advanced Materials Research 154-155 (October 2010): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.154-155.425.

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In this paper, using experimental method studied to repair surface fatigue damage of the metal material by heat treatment. Analyzed the mechanism to repair surface fatigue damage of the metal material by heat treatment. From the test, it have been found that the Metal materials has temping threshold behavior in repairing it’s fatigue damage by heat treatment. For the same kind of material, there is a threshold characteristics in choosing tempering temperatures when repaired the fatigue damage of metal material surface through changed tempering temperatures. Experimental results shows that the temping temperature threshold to repair metal material fatigue damage is the first tempering temperature after materials was hardened before it was in fatigue damage.

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Liu, Liren, Jennifer Lee, and Pengbo Zhou. "Navigating the nucleotide excision repair threshold." Journal of Cellular Physiology 224, no. 3 (April 23, 2010): 585–89. http://dx.doi.org/10.1002/jcp.22205.

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Hasegawa, Kunio, Saburo Usami, and Bohumír Strnadel. "Fatigue Crack Growth Thresholds under Negative Stress Ratio for Aluminium Alloys." Key Engineering Materials 810 (July 2019): 34–39. http://dx.doi.org/10.4028/www.scientific.net/kem.810.34.

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When fatigue crack growth rate da/dN = 0, the stress intensity factor range ΔKI is a threshold and it is expressed by ΔKI = ΔKth. The threshold ΔKth is important for design, repair/replacement, particularly, trouble shooting for cracked components. However, the thresholds were not well codified. Authorized and consensus ΔKth are required. This paper introduces the current thresholds provided by fitness-for-service codes and the definition of ΔKth under negative stress ratio R is discussed. Finally, the threshold ΔKth for aluminum alloys in air environment is proposed for fitness-for-service codes.

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Ojobor, S. A., and N. O. Ogini. "Threshold recovery policy for the machine interference repair problem with server vacations." Journal of Physics: Conference Series 2199, no. 1 (February 1, 2022): 012020. http://dx.doi.org/10.1088/1742-6596/2199/1/012020.

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Abstract In this paper, we consider the threshold recovery policy for the machine interference problem (MIP) with server vacations, having a non-dependable server which operates a threshold recovery policy, i.e., service starts after a fixed threshold level q ≥ 1. In the threshold recovery policy, M machines of similar nature are subject to fail or break down with a single server responsible for maintaining or repairing the failed machines. When the server is working, it is subject to breakdown with exponential distribution rate α; it is not possible to repair any server until the number of failed computers exceeds a predetermined threshold, q where 1 ≤ q ≤ M. The repaired rate is exponentially distributed with rate β. The server breaks down with a constant failure rate. The repair and vacation time of server is exponentially distributed. We developed the difference differential equations for the transient state probabilities for the system. We calculate the threshold recovery strategy for the MIP with server vacation using the ODE45 (Runge-Kutta method for solving ordinary differential equations) in the MATLAB computer language. We develop a variety of operational quality metrics for the system.

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Park, Minjae, Ki Mun Jung, and Dong Ho Park. "Optimal post-warranty maintenance policy with repair time threshold for minimal repair." Reliability Engineering & System Safety 111 (March 2013): 147–53. http://dx.doi.org/10.1016/j.ress.2012.10.017.

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Petcherdchoo, Aruz. "Probabilistic Assessment of CO₂ due to Concrete Repairs for Crack-Free Condition of Marine Concrete Structures." Advanced Materials Research 931-932 (May 2014): 426–30. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.426.

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An approach which combines the Latin Hypercube technique with Crank-Nicolson based finite difference approach is developed for probabilistic assessment of chloride diffusion in concrete structures with repairs. Two random variables, i.e., surface chloride and diffusion coefficient, are considered. Four repair strategies are proposed by varying the diffusion coefficient of repair concrete and the repair depth. A repair by cover replacement is applied at a critical time which the chloride content at a threshold depth reaches its critical value for concrete cracking. The critical time is defined as the repair time, which the CO2 due to repair concrete production and replacement processing occurs. By this method, the median of repair time and the probabilistic time-dependent CO2 can be assessed. The mean and the percentiles of cumulative total CO2 are compared.

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Fu, Zhongqiu, Dongyang Wu, Liang Fang, Donghua Chen, and Bohai Ji. "Influence Factors and Repair Effects of Seismic Damage to a Box Section Steel Pier." Journal of Earthquake and Tsunami 13, no. 03n04 (June 2019): 1940001. http://dx.doi.org/10.1142/s1793431119400013.

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The seismic performance of a steel pier of box section was studied through low-cycle cyclic testing. The damaged specimens were repaired by filling with concrete and welding steel plates. The low-cycle cyclic test was then repeated. The effects of repairs were investigated by comparison of failure mode, energy dissipation performance, and ductility before and after repair. To supplement the data, the influence of different factors on the seismic bearing capacity and ductility of steel piers were analyzed by finite element method. The repair effects were compared by threshold of the displacement from the experiment. Based on the displacement angle response of the nonlinear dynamic time history analysis, the seismic performance is checked. The results show that repair had favourable effects on the damaged specimens. The horizontal bearing capacity and ductility of the specimens filled with concrete are significantly enhanced. Reinforcement by steel plates can increase the ductility and cumulative energy dissipation of the steel pier. An axial compression ratio of 0.2 and a concrete filling ratio of 30% are suggested. The horizontal bearing capacity can be improved by increasing the steel strength while the concrete strength shows little effect. The angular displacement from nonlinear dynamic time-history analysis was less than the test threshold, so the existing methods used for seismic performance verification are safe.

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Eid, Mark A., Xavier P. Fowler, Jesse A. Columbo, Bjoern D. Suckow, David H. Stone, and Philip P. Goodney. "Deferred Abdominal Aortic Aneurysm Repair in Patients Who Meet Threshold Criteria for Repair." Journal of Vascular Surgery 75, no. 6 (June 2022): e239. http://dx.doi.org/10.1016/j.jvs.2022.03.486.

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Ji, Qiu, Guilin Qi, Yinkai Yang, Weizhuo Li, Siying Huang, and Yang Sheng. "An Embedding-Based Approach to Repairing OWL Ontologies." Applied Sciences 12, no. 24 (December 9, 2022): 12655. http://dx.doi.org/10.3390/app122412655.

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High-quality ontologies are critical to ontology-based applications, such as natural language understanding and information extraction, but logical conflicts naturally occur in the lifecycle of ontology development. To deal with such conflicts, conflict detection and ontology repair become two critical tasks, and we focus on repairing ontologies. Most existing approaches for ontology repair rely on the syntax of axioms or logical consequences but ignore the semantics of axioms. In this paper, we propose an embedding-based approach by considering sentence embeddings of axioms, which translates axioms into semantic vectors and provides facilities to compute semantic similarities among axioms. A threshold-based algorithm and a signature-based algorithm are designed to repair ontologies with the help of detected conflicts and axiom embeddings. In the experiments, our proposed algorithms are compared with existing ones over 20 real-life incoherent ontologies. The threshold-based algorithm with different distance metrics is further evaluated with 10 distinct thresholds and 3 pre-trained models. The experimental results show that the embedding-based algorithms could achieve promising performances.

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Psarras, Spyridon, Theodoros Loutas, Magdalini Papanaoum, Orestis Konstantinos Triantopoulos, and Vasilis Kostopoulos. "Investigating the Effect of Stepped Scarf Repair Ratio in Repaired CFRP Laminates under Compressive Loading." Journal of Composites Science 4, no. 4 (October 19, 2020): 153. http://dx.doi.org/10.3390/jcs4040153.

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In this work the effectiveness of stepped repairs to damaged fiber reinforced composite materials is investigated by using previously validated numerical models which were compared with tested repaired composite plates. Parametric studies were carried out in order to assess the scarf ratio (i.e., step length to ply thickness ratio) influence on ultimate forces, displacements, stresses and stiffnesses. FE models with repair scarf ratios varying from the value of 20 to the value 60 with a step increase of 10 were developed. The numerical models allowed a direct comparison of the influence that the scarf ratio had to the strength and stiffness restoration of the repaired composite structure. The study verifies that the restoration of the strength of a damaged laminate depends largely on the size of the repair patch. Generally, the bigger the size of a patch, the stronger the repaired structure is, up to a critical threshold size. To maximize the strength restoration, it is advised that the number of steps in each patch are no less than the number of plies on the base laminate.

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Deery, Sarah E., and Marc L. Schermerhorn. "Should Abdominal Aortic Aneurysms in Women be Repaired at a Lower Diameter Threshold?" Vascular and Endovascular Surgery 52, no. 7 (May 2, 2018): 543–47. http://dx.doi.org/10.1177/1538574418773247.

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Abdominal aortic aneurysm (AAA) primarily affects male patients; however, female patients with AAA have a faster rate of aneurysm growth, have higher risk of rupture even at smaller diameters, and have worse outcomes following repair of ruptured and intact aneurysms. Furthermore, early natural history studies and randomized controlled trials evaluating surveillance versus repair in small aneurysms were conducted primarily in male patients. Therefore, there are limited data regarding the ideal threshold for elective repair of AAA in women, either by aortic diameter or by alternative measures. We review the existing literature regarding AAA in women and consider the most appropriate threshold for repair.

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Petcherdchoo, Aruz. "Probability-Based Sensitivity of Service Life of Chloride-Attacked Concrete Structures with Multiple Cover Concrete Repairs." Advances in Civil Engineering 2018 (December 4, 2018): 1–17. http://dx.doi.org/10.1155/2018/4525646.

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This paper presents probabilistic and sensitivity analysis of service life (or time to repairs) for attaining corrosion-free condition of concrete structures under chloride attack. Four groups of probabilistic parameters are determined, i.e., (1) time-dependent chloride content, (2) mean and median of corrosion initiation and repair application times, (3) percent confidence of repairs, and (4) total expected number of repairs. To achieve this, this paper proposes a computational approach and probabilistic data. The proposed approach, which combined the Latin Hypercube technique with the Crank–Nicolson-based finite difference approach, is developed for predicting probabilistic chloride diffusion in concrete with repairs by cover concrete replacement. Probabilistic data of four governing random variables (surface chloride, diffusion coefficient, concrete cover depth, and critical chloride) and six repair strategies for corrosion-free condition are introduced. Numerical assessment is then shown. From the study, it is revealed that the reduction of the amount of chloride ions at the threshold depth due to using higher depth of cover concrete repairs is better than that using higher quality of repair materials. However, the excessive depth of repairs is not always recommended due to another control factor, such as the immediate amount of chloride ions at the repair depth, cost of repairs, etc. From the sensitivity analysis, the cover depth is found to be the most important parameter in the design of chloride-attacked concrete structures to extend the corrosion initiation and repair application times and to reduce the total expected number of repairs.

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Kane, Gillian, Elan Golan, Kevin Wilson, Bryson Lesniak, and Ryan Li Albert Lin. "Combined subcritical thresholds of glenoid and humeral sided bone loss are predictive of failure after arthroscopic Bankart repair." Orthopaedic Journal of Sports Medicine 8, no. 7_suppl6 (July 1, 2020): 2325967120S0038. http://dx.doi.org/10.1177/2325967120s00380.

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Objectives: Glenoid and humeral sided bone loss are both independent risk factors for failure after arthroscopic Bankart repair. The purpose of this study was to determine the combined effect of subcritical levels of humeral and glenoid sided bone loss on failure after arthroscopic Bankart repair. Methods: 171 individuals with minimum 2 years follow up who underwent primary arthroscopic Bankart repair between 2007-2015 were included in this study. Glenoid and humeral sided bone loss were measured using the glenoid track model. Cases were defined as individuals who sustained a subluxation or dislocation event after the index procedure, while controls were defined as individuals who did not. Subjects were stratified by age (20+ versus < 20 years). Receiver operating curves (ROC) were generated to determine the threshold of glenoid and humeral sided bone loss that could best predict failure. Results: There were 53 cases and 118 controls. Increased glenoid (p < .001) and humeral-sided (p = .013) bone loss independently predicted failure. ROC analysis demonstrated that threshold values of 12% glenoid (AUC = 0.62) and 13 mm humeral (AUC = 0.60) bone loss were predictive of failure. Combined subcritical thresholds of 10% glenoid and 10 mm humeral sided bone loss successfully predicted outcomes of 49/56 (87.5%) individuals over age 20 and 79/117 (67.5%) individuals under age 20. Humeral and glenoid sided bone loss had an additive effect on risk of failure in older individuals while glenoid sided bone loss was primarily responsible for failure in younger individuals. Conclusion: Both glenoid and humeral sided bone loss are predictive of failure after arthroscopic Bankart repair. Combined subcritical thresholds of glenoid and humeral sided bone loss accurately predict failure, particularly in individuals over the age of 20. These results suggest that individuals with subcritical bipolar lesions may be at higher risk of failure after arthroscopic Bankart repair than previously thought. [Table: see text]

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Zhang, Jiangmei, Xiang Gao, Kunpeng Wang, Youyong Liu, Xiuhong Yang, and Yihui Ao. "Detection of the damage threshold of fused silica components and morphologies of repaired damage sites based on the beam deflection method." Open Physics 16, no. 1 (August 20, 2018): 539–43. http://dx.doi.org/10.1515/phys-2018-0070.

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Abstract This article proposes a method to quickly detect the damage threshold of the fused silica components and the characteristics of the repair point damage. With a device detecting the beam deflection, the laser damage threshold is detected, quickly and effectively. Then, based on the beam deflection though mitigated sites, the beam deflection signals of the damage repair points are measured and the morphologies of mitigated sites are analyzed. This method is helpful in the online assessment of the damage resistance of the downstream optics and provides the guidance of the repair process.

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Jia, Zhi Yu, Rui Kang, Li Chao Wang, and Nai Chao Wang. "Availability Research on K-out-of-N: G Systems with Repair Time Omission." Advanced Materials Research 118-120 (June 2010): 342–47. http://dx.doi.org/10.4028/www.scientific.net/amr.118-120.342.

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Based on some practical problems in maintenance, a new model for K-out-of-N Markov repairable systems is introduced in this paper. The model focuses on that repair times that are sufficiently short (less than some threshold value) do not affect the system operation. We can say that such a repair time is omitted from the downtime record, and the system can be considered as being operating during this repair time. A model is built in which the threshold value is regarded as a constant at first. And then the model is generalized to allow the threshold value to be a non-negative random variable. Both instantaneous availability and steady-state availability are calculated for these new models as reliability indices. Some numerical examples are presented to verify the validity of these models.

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Et. al., Dr K. Uma Maheswari,. "Cataloging Of Unit Replacement Based On Long Run Repair Average Cost Rate (Acr) Based On Weibull Distribution Model." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 11 (May 10, 2021): 1880–85. http://dx.doi.org/10.17762/turcomat.v12i11.6140.

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Large amounts of money are lost each year in the real-estate industry because of poor schedule and cost control, In Industry the investigated failure and repair pattern, reliabilities of generators, compressors, turbines, using simple statistical tools and simulation techniques. The repair duration is divided into the 1)Major repair 2)Minor repair ,In major repair having(repair hour greater than a threshold valve)and Minor repair having(repair hour less than (or)equal to threshold valve).This approach is mainly for Weibull distribution method. In Weibull analysis is a common method for failure analysis and reliability engineering used in a wide range of applications. In this paper, the applicability of Weibull analysis for evaluating and comparing the reliability of the schedule performance of multiple projects is presented, while the successive performance of multiple projects is presented ,while the successive repair times are increasing and are exposing to Weibull distribution ,under these assumptions ,an optimal replacement policy ‘T’ in which we replace the system ,when the repair time reaches T. It can be determined that an optimal repair replacement policy T* such that long run average cost and the corresponding optimal replacement policy T* can be determined analytically.

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Bleier, Benjamin Saul, Michael Anne Gratton, Jason M. Leibowitz, James N. Palmer, Jason G. Newman, and Noam A. Cohen. "R405 – Laser Welded Transluminal Repair of Rabbit Esophageal Injury." Otolaryngology–Head and Neck Surgery 139, no. 2_suppl (August 2008): P178—P179. http://dx.doi.org/10.1016/j.otohns.2008.05.559.

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Problem To test the feasibility of Laser Tissue Welding in creating an endoscopic transluminal repair of esophageal perforation. Methods A diode laser was used to create an endoluminal rabbit esophageal perforation repair. Burst pressures were compared to open incision, external suture, and external laser augmented suture closure. Comparisons were performed 5 times and analyzed using Kruskal-Wallis ANOVA and a post-hoc Dunn's Method. Results The burst threshold of the endoluminal weld (54.78mHg) was significantly higher than the open incision (6.5mmHg) and not significantly different than the external suture (37.18mmHg) or the laser augmented suture group (71.60mmHg). Conclusion Laser welding is a feasible method of creating endoluminal repairs with burst strengths comparable to external suture repair. Significance This is the first report of Laser Tissue Welding for endoscopic closure of iatrogenic esophageal perforation which may allow a subset of these patients to avoid traditional open approaches.

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Rodrigues, Josemar, N. Balakrishnan, Gauss M. Cordeiro, Mário de Castro, and Vicente G. Cancho. "Latent cure rate model under repair system and threshold effect." Journal of Statistical Computation and Simulation 85, no. 14 (July 25, 2014): 2860–73. http://dx.doi.org/10.1080/00949655.2014.943223.

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Pernar, Luise I. M., Claire H. Pernar, Bryan V. Dieffenbach, David C. Brooks, Douglas S. Smink, and Ali Tavakkoli. "What is the BMI threshold for open ventral hernia repair?" Surgical Endoscopy 31, no. 3 (July 20, 2016): 1311–17. http://dx.doi.org/10.1007/s00464-016-5113-5.

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Qiu, Qingan, and Lirong Cui. "Availability analysis for general repairable systems with repair time threshold." Communications in Statistics - Theory and Methods 48, no. 3 (January 8, 2018): 628–47. http://dx.doi.org/10.1080/03610926.2017.1417430.

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Park, Minjae, Ki Mun Jung, and Dong Ho Park. "Optimal maintenance strategy under renewable warranty with repair time threshold." Applied Mathematical Modelling 43 (March 2017): 498–508. http://dx.doi.org/10.1016/j.apm.2016.11.015.

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Federgruen, Awi, and Kut C. So. "Optimal time to repair a broken server." Advances in Applied Probability 21, no. 2 (June 1989): 376–97. http://dx.doi.org/10.2307/1427165.

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We consider a single-server queueing system with Poisson arrivals and general service times. While the server is up, it is subject to breakdowns according to a Poisson process. When the server breaks down, we may either repair the server immediately or postpone the repair until some future point in time. The operating costs of the system include customer holding costs, repair costs and running costs. The objective is to find a corrective maintenance policy which minimizes the long-run average operating costs of the system. The problem is formulated as a semi-Markov decision process. Under some mild conditions on the repair time and service time distributions and the customer holding cost rate function, we prove that there exists an optimal stationary policy which is characterized by a single threshold parameter: a repair is initiated if and only if the number of customers in the system exceeds this threshold. We also show how the average cost under such policies may be computed and how an optimal policy may efficiently be determined.

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Federgruen, Awi, and Kut C. So. "Optimal time to repair a broken server." Advances in Applied Probability 21, no. 02 (June 1989): 376–97. http://dx.doi.org/10.1017/s0001867800018590.

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We consider a single-server queueing system with Poisson arrivals and general service times. While the server is up, it is subject to breakdowns according to a Poisson process. When the server breaks down, we may either repair the server immediately or postpone the repair until some future point in time. The operating costs of the system include customer holding costs, repair costs and running costs. The objective is to find a corrective maintenance policy which minimizes the long-run average operating costs of the system. The problem is formulated as a semi-Markov decision process. Under some mild conditions on the repair time and service time distributions and the customer holding cost rate function, we prove that there exists an optimal stationary policy which is characterized by a single threshold parameter: a repair is initiated if and only if the number of customers in the system exceeds this threshold. We also show how the average cost under such policies may be computed and how an optimal policy may efficiently be determined.

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Casazza, Geoffrey C., Lincoln C. Gray, Debra Hildebrand, and Bradley W. Kesser. "Acoustic Reflexes in Aural Atresia Patients: Evidence of an Intact Efferent System?" Annals of Otology, Rhinology & Laryngology 130, no. 9 (January 24, 2021): 1004–9. http://dx.doi.org/10.1177/0003489421990168.

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Objective: To record crossed acoustic reflex thresholds (xART’s) postoperatively from patients after surgical repair of unilateral congenital aural atresia (CAA). To seek explanations for when xARTs can and cannot be recorded. We hope to understand the implications for this central auditory reflex despite early afferent deprivation. Methods: Patients who underwent surgery to correct unilateral CAA at a tertiary academic medical were prospectively enrolled to evaluate for the presence of xART. Preoperative ARTs in the normal (non-atretic) ear, and postoperative ipsilateral ARTs (stimulus in the normal ear) and contralateral ARTs (stimulus in the newly reconstructed atretic ear; record in the normal ear) were measured at 500, 1000, and 2000 Hz. Results: Four of 11 patients with normal ipsilateral reflex thresholds preoperatively demonstrated crossed acoustic reflexes postoperatively (stimulus in reconstructed ear; record from normal ear). Four other patients demonstrated normal ipsilateral thresholds preoperatively but did not have crossed reflexes postoperatively. No reflexes (pre- or postoperatively) could be recorded in 3 patients. Crossed reflex threshold is significantly correlated with the postoperative audiometric threshold. There was no correlation between ipsilateral and contralateral reflex thresholds. Conclusion: Crossed acoustic reflexes can be recorded from some but not all postoperative atresia patients, and the thresholds for those reflexes correlate with the postoperative pure tone threshold. The presence of acoustic reflexes implies an intact CN VIII-to-opposite CN VII central reflex arc despite early unilateral sound deprivation.

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Sethi, Rachita, Amita Bhagat, and Deepika Garg. "ANFIS based Machine Repair Model with Control Policies and Working Vacation." International Journal of Mathematical, Engineering and Management Sciences 4, no. 6 (December 1, 2019): 1522–33. http://dx.doi.org/10.33889/ijmems.2019.4.6-120.

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This study is concerned with the transient state analysis of M/M/1 machine repairable system consisting of M operating units. F-policy is quite useful to avoid the overloading of failed machines that arrive for repair in the system. The failed machines are repaired by a server that is susceptible to failure and follows the threshold recovery while being repaired. The server leaves for a vacation if there are no machines waiting in the system for the repair. Runge-Kutta method is implemented to solve the governing equations and evaluate the system's state probabilities. Cost function is also designed to determine the system’s minimum cost. In addition, the numerical outcomes acquired by the Runge-Kutta method are compared with the results generated by adaptive neuro-fuzzy inference system (ANFIS).

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Arner, Justin W., Joseph J. Ruzbarsky, Kaare Midtgaard, Liam Peebles, James P. Bradley, and Matthew T. Provencher. "Defining Critical Glenoid Bone Loss in Posterior Shoulder Capsulolabral Repair." American Journal of Sports Medicine 49, no. 8 (June 3, 2021): 2013–19. http://dx.doi.org/10.1177/03635465211016804.

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Background: Although critical bone loss for anterior instability is well defined, a clinically significant threshold of posterior bone loss has not been elucidated. Hypothesis: Patients with failed arthroscopic posterior shoulder capsulolabral repair will have increased posterior glenoid bone loss with a defined critical threshold. Study Design: Case control study; Level of evidence, 3. Methods: Athletes older than 18 years with unidirectional posterior instability treated with arthroscopic repair were evaluated at 2-year minimum follow-up. Failure was defined as revision surgery, American Shoulder and Elbow Surgeons (ASES) score of <60, or subjective stability score of >5. Magnetic resonance imaging (MRI) measurements from 19 patients with failed arthroscopic posterior shoulder capsulolabral repair were compared with 56 patients whose surgery was successful. MRI measures included glenoid version, labral version, glenoid width, labral width, percentage bone loss using the circle technique, labral height, percent subluxation, and recently described measures of defect slope, bone loss angle, and defect length. The P value threshold was set at .05, and a multivariable logistic regression analysis was performed for evaluation of risk of surgical failure. Results: Smaller glenoid width and greater percentage glenoid bone loss (25.5 ± 0.68 mm vs 28.8 ± 0.47 mm; P < .001; 6.8% ± 0.64% vs 4.6% ± 0.43%; P = .008) were seen in those patients with failed surgery. There was no difference in glenoid version or other measurements between the failures and nonfailures. A cutoff of 11% glenoid bone loss resulted in a 10.4 times statistically higher surgical failure rate, while a 15% bone loss resulted in a 24.4 times statistically higher failure rate. Six patients had >11% bone loss (range, 11.1 to 19.3) and 1 patient had >15% bone loss. Conclusion: Risk factors for failure of arthroscopic posterior shoulder capsulolabral repair include smaller glenoid bone width and greater percentage of glenoid bone loss. A threshold of 11% posterior glenoid bone loss implicated a 10 times higher surgical failure rate, while a threshold of 15% led to a 25 times higher surgical failure rate. Surgical failure of posterior capsulolabral repair, however, is relatively rare as it is an overall successful intervention.

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Wang, Liying, Yushuang Song, Qingan Qiu, and Li Yang. "Warranty Cost Analysis for Multi-State Products Protected by Lemon Laws." Applied Sciences 13, no. 3 (January 25, 2023): 1541. http://dx.doi.org/10.3390/app13031541.

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The implementation of lemon laws in America has played an important role in improving the quality of after-sales service. Nowadays, many countries, such as China, Canada, Europe, Australia, Singapore, and South Korea, have adopted lemon laws in various industries to protect the interest of consumers. From the perspective of manufacturers, accurate estimation of the cost of the warranty service is of great importance in guiding product pricing, quality control, and design of warranty policies. According to the terms of different lemon laws, two warranty models considering the repair time and numbers for failures are proposed in this paper. Products under these models are multi-state, and Markov processes are used to model the degradation processes of products. In the first model, a product will be replaced by a new one if the time for a repair or the number of failures exceeds their respective thresholds over the warranty period. Under the second model, both catastrophic and minor failures are considered. A product will be replaced if one of the following three conditions is met over the warranty period: the time of one repair action (regardless of failure type) is longer than a time threshold; the number of minor failures is larger than a preset threshold; a catastrophic failure occurs. The expected warranty cost rates under the two proposed warranty models are derived under the assumption of renewable warranty terms. Numerical examples are given to illustrate the results obtained.

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Batais, Saleh. "Consonantal Adaptation of Arabic Loanwords in Kiswahili and Kisukuma: A Phonological Explanation." Advances in Language and Literary Studies 10, no. 2 (April 30, 2019): 85. http://dx.doi.org/10.7575/aiac.alls.v.10n.2p.85.

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Based on three lists of well-established Arabic lexical borrowings in Standard Kiswahili and Standard Kisukuma, the study attempts to answer two questions. First, the study explores what consonantal repair strategies are triggered by both Standard Kiswahili and Standard Kisukuma to ensure the conformity of the Arabic consonants with the consonantal inventories of the two borrowing languages. Second, it investigates whether these repair strategies are phonological operations. It was found that nine of the ten consonantal repairs employed by both Standard Kiswahili and Standard Kisukuma are governed by the hypothesis and principles proposed by Paradis and LaCharité (1997, 2001, 2005), that is, the Non-Availability Hypothesis, Category Proximity and Preservation Principles, and the Threshold Principle. These findings lend strong support to the argument that loanword adaptation processes are phonologically motivated. In conclusion, the paper aims to contribute primarily to the research on loanword adaptation in general, and to the literature relevant to the consonantal repair strategies in Standard Kiswahili and Standard Kisukuma, in particular.

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Salehi-Rad, M. R., K. Mengersen, and G. H. Shahkar. "Reservicing some customers inM/G/1queues under three disciplines." International Journal of Mathematics and Mathematical Sciences 2004, no. 32 (2004): 1715–23. http://dx.doi.org/10.1155/s0161171204210389.

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Consider anM/G/1production line in which a production item is failed with some probability and is then repaired. We consider three repair disciplines depending on whether the failed item is repaired immediately or first stockpiled and repaired after all customers in the main queue are served or the stockpile reaches a specified threshold. For each discipline, we find the probability generating function (p.g.f.) of the steady-state size of the system at the moment of departure of the customer in the main queue, the mean busy period, and the probability of the idle period.

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CHEUNG, MICHAEL M. H., ROBERT G. WEINTRAUB, RICHARD J. COHEN, TOM R. KARL, JAMES L. WILKINSON, and ANDREW M. DAVIS. "T Wave Alternans Threshold Late After Repair of Tetralogy of Fallot." Journal of Cardiovascular Electrophysiology 13, no. 7 (July 2002): 657–61. http://dx.doi.org/10.1046/j.1540-8167.2002.00657.x.

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Cheung, M. M. H., A. M. Davis, R. Weintraub, R. J. Cohen, T. R. Karl, and J. L. Wilkinson. "T-wave alternans threshold late after repair of tetralogy of fallot." Heart, Lung and Circulation 9, no. 3 (December 2000): A93. http://dx.doi.org/10.1046/j.1443-9506.2000.06140.x.

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Wu, Chia-Huang, Jau-Chuan Ke, and Gautam Choudhury. "Analysis of the Machine Repair Models With Multi-Threshold Synchronous Vacations." Journal of Testing and Evaluation 41, no. 3 (March 26, 2013): 20120061. http://dx.doi.org/10.1520/jte20120061.

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Efrosinin, Dmitry, Anastasia Winkler, and Pinzger Martin. "Confidence Intervals for Performance Measures of M/M/1 Queue with Constant Retrial Policy." Asia-Pacific Journal of Operational Research 32, no. 06 (December 2015): 1550046. http://dx.doi.org/10.1142/s0217595915500463.

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We consider the problem of estimation and confidence interval construction of a Markovian controllable queueing system with unreliable server and constant retrial policy. For the fully observable system the standard parametric estimation technique is used. The arrived customer finding a free server either gets service immediately or joins a retrial queue. The customer at the head of the retrial queue is allowed to retry for service. When the server is busy, it is subject to breakdowns. In a failed state the server can be repaired with respect to the threshold policy: the repair starts when the number of customers in the system reaches a fixed threshold level. To obtain the estimates for the system parameters, performance measures and optimal threshold level we analyze the system in a stationary regime. The performance measures including average cost function for the given cost structure are presented in a closed matrix form.

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Rice, Morgan W., Lakshmanan Sivasundaram, Mario Hevesi, Robert B. Browning, Thomas D. Alter, Katlynn Paul, and Shane J. Nho. "Defining the Minimal Clinically Important Difference and Patient Acceptable Symptom State After Endoscopic Gluteus Medius or Minimus Repair With or Without Labral Treatment and Routine Capsular Closure at Minimum 5-Year Follow-up." American Journal of Sports Medicine 50, no. 10 (August 2022): 2629–36. http://dx.doi.org/10.1177/03635465221105469.

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Background: There is a paucity of information in the literature on midterm outcomes of endoscopic gluteus medius and/or minimus repair with concomitant labral treatment using only modern surgical techniques. Purpose: To define the minimal clinically important difference (MCID) and Patient Acceptable Symptom State (PASS) at a minimum of 5 years postoperatively for patients undergoing endoscopic hip abductor repair with routine capsular closure. Study Design: Case series; Level of evidence, 4. Methods: Consecutive patients who underwent primary endoscopic repair of gluteus medius and/or minimus tears between January 2012 and December 2015 by the senior author were eligible for inclusion. Patient-reported outcome scores were assessed preoperatively and at 5 years postoperatively: Hip Outcome Score–Activities of Daily Living (HOS-ADL), HOS–Sport Specific (HOS-SS), modified Harris Hip Score (mHHS), 12-item International Hip Outcome Tool (iHOT-12), and visual analog scale (VAS) for pain. The MCID was uniquely calculated using the distribution method, and the PASS was determined via the anchor-based method utilizing receiver operating characteristic curves and Youden index. Results: A total of 46 patients were included in the study. The majority were female (87.0%), with a mean ± standard deviation age of 59.1 ± 8.9 years and body mass index of 27.3 ± 6.9. Significant postoperative improvements ( P < .001) in each of the 5 patient-reported outcomes were observed at 5 years postoperatively. The MCID threshold values were calculated as follows: HOS-ADL, 11.5; HOS-SS, 15.1; mHHS, 13.3; iHOT-12, 11.8; and VAS, 15.8. The PASS thresholds were calculated as follows: HOS-ADL, 75.7; HOS-SS, 79.7; mHHS, 81.2; and iHOT-12, 60.8. A majority of patients achieved a clinically significant outcome, with 96.2% of patients reaching a threshold score for the MCID or PASS for at least 1 patient-reported outcome. Conclusion: Endoscopic hip abductor repair with concomitant arthroscopic labral treatment has a high rate of achievement of clinically significant outcomes and survivorship at a minimum 5-year follow-up. We defined the MCID for the HOS-ADL, HOS-SS, mHHS, iHOT-12, and VAS outcome scores to be 11.5, 15.1, 13.3, 11.8, and 15.8, respectively. The PASS threshold scores for the HOS-ADL, HOS-SS, mHHS and iHOT-12 scores of 75.7, 79.7, 81.2, and 60.8, respectively. Future researchers and clinicians can use the MCID and PASS values established in this study to better evaluate mid-term outcomes of patients undergoing hip abductor repair.

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Liu, Wang, Xiao Li, and Fengjiao Wu. "Research on Restoration Algorithm of Tomb Murals Based on Sequential Similarity Detection." Scientific Programming 2021 (October 7, 2021): 1–8. http://dx.doi.org/10.1155/2021/6842353.

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Considering the problems of fuzzy repair and low pixel similarity matching in the repair of existing tomb murals, we propose a novel tomb mural repair algorithm based on sequential similarity detection in this paper. First, we determine the gradient value of tomb mural through second-order Gaussian Laplace operator in LOG edge detection and then reduce the noise in the edge of tomb mural to process a smooth edge of tomb mural. Further, we set the mathematical model to obtain the edge features of tomb murals. To calculate the average gray level of foreground and background under a specific threshold, we use the maximum interclass variance method, which considers the influence of small cracks on the edge of tomb murals and separates the cracks through a connected domain labelling algorithm and open and close operations to complete the edge threshold segmentation. In addition, we use the priority calculation function to determine the damaged tomb mural area, calculate the gradient factor of edge information, obtain the information entropy of different angles, determine the priority of tomb mural image repair, detect the similarity of tomb mural repair pixels with the help of sequential similarity, and complete the tomb mural repair. Experimental results show that our model can effectively repair the edges of the tomb murals and can achieve a high pixel similarity matching degree.

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Rolfsmeier, Michael L., Michael J. Dixon, Luis Pessoa-Brandão, Richard Pelletier, Juan José Miret, and Robert S. Lahue. "Cis-Elements Governing Trinucleotide Repeat Instability in Saccharomyces cerevisiae." Genetics 157, no. 4 (April 1, 2001): 1569–79. http://dx.doi.org/10.1093/genetics/157.4.1569.

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Abstract Trinucleotide repeat (TNR) instability in humans is governed by unique cis-elements. One element is a threshold, or minimal repeat length, conferring frequent mutations. Since thresholds have not been directly demonstrated in model systems, their molecular nature remains uncertain. Another element is sequence specificity. Unstable TNR sequences are almost always CNG, whose hairpin-forming ability is thought to promote instability by inhibiting DNA repair. To understand these cis-elements further, TNR expansions and contractions were monitored by yeast genetic assays. A threshold of ∼15–17 repeats was observed for CTG expansions and contractions, indicating that thresholds function in organisms besides humans. Mutants lacking the flap endonuclease Rad27p showed little change in the expansion threshold, suggesting that this element is not altered by the presence or absence of flap processing. CNG or GNC sequences yielded frequent mutations, whereas A-T rich sequences were substantially more stable. This sequence analysis further supports a hairpin-mediated mechanism of TNR instability. Expansions and contractions occurred at comparable rates for CTG tract lengths between 15 and 25 repeats, indicating that expansions can comprise a significant fraction of mutations in yeast. These results indicate that several unique cis-elements of human TNR instability are functional in yeast.

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Brusselaers, Jan, Ellen Bracquene, Jef Peeters, and Yoko Dams. "Economic consequences of consumer repair strategies for electrical household devices." Journal of Enterprise Information Management 33, no. 4 (November 13, 2019): 747–67. http://dx.doi.org/10.1108/jeim-12-2018-0283.

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Purpose The purpose of this paper is to investigate to what extent a consumer’s repair strategy impacts the annual costs of ownership of a washing machine and two types of vacuum cleaner. Design/methodology/approach The annual cost of ownership is determined by calculating the annual life cycle cost (LCC) for the respective devices. The annual LCCs of the different scenarios allow a comparison of the different repair strategy options. A Monte Carlo simulation is run to introduce parameter variability. The device’s failure rate is estimated by a combination of data sets on the devices’ performance. Findings Results demonstrate that the repair of the devices considered is a more favourable option over replacement. A consumer who aims for the lowest annual LCC should allow for a high number of repairs per device, without putting a maximum on the cost per repair. However, the consumer should become more cautious when a device approaches the end of its expected lifetime. Finally, the purchase of warranty can be interesting when the warranty covers a sufficiently long proportion of the device’s (expected) lifetime and when its cost does not exceed a threshold proportion of the initial purchase price. Research limitations/implications The costs for repair might be overestimated. Future research can focus on the reduction of repair costs following self-repair. Practical implications The results provide strong arguments in favour of repair instead of replacement of broken devices. Originality/value This is the first research to quantify the influence of consumer behaviour in the context of repair of devices on the ownership costs of these devices.

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Laing, Thalia M., and Douglas R. Stinson. "A survey and refinement of repairable threshold schemes." Journal of Mathematical Cryptology 12, no. 1 (March 1, 2018): 57–81. http://dx.doi.org/10.1515/jmc-2017-0058.

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Abstract We consider repairable threshold schemes (RTSs), which are threshold schemes that enable a player to securely reconstruct a lost share with help from their peers. We summarise and, where possible, refine existing RTSs and introduce a new parameter for analysis, called the repair metric. We then explore using secure regenerating codes as RTSs and find them to be immediately applicable. We compare all RTS constructions considered and conclude by presenting the best candidate solutions for when either communication complexity or information rate is prioritised.

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Qureshi, Mahim I., and Alun H. Davies. "Endovascular aneurysm repair in the elderly: First do no harm." Vascular 26, no. 1 (October 10, 2017): 113–14. http://dx.doi.org/10.1177/1708538117717855.

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Endovascular aneurysm repair (EVAR) has become the intervention of choice for supra-threshold aortic aneurysms due to the lower 30-day mortality of EVAR as compared with open surgery, despite no long-term longevity gains. Trials such as EVAR-1 that established the current status of endovascular aortic intervention often excluded participants over the age of 80, and specific studies of EVAR in the elderly reveal higher mortality than accepted averages. Analyses of the cost-effectiveness of EVAR have not demonstrated superiority of endovascular intervention over open repair, in particular when considering complications such as endoleak. Post-intervention surveillance and the frequent need for re-intervention following EVAR has a detrimental impact on quality of life. Taking these factors into consideration, combined with an ageing population and the likely increase in octogenarian endovascular intervention, there is a clear clinical need for appropriate risk-stratification of elderly patients with supra-threshold aneurysms to determine who will benefit from endovascular repair.

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Tjahajawati, Sri, Anggun Rafisa, Nani Murniati, and Cucu Zubaedah. "Correlation between Taste Threshold Sensitivity and MMP-9, Salivary Secretion, Blood Pressure, and Blood Glucose Levels in Smoking and Nonsmoking Women." International Journal of Dentistry 2020 (March 12, 2020): 1–5. http://dx.doi.org/10.1155/2020/4178674.

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Cigarette smoking can cause taste receptors to increase the taste threshold value. Consequently, the consumption of sugar and salt will not be controlled, therefore causing systemic diseases such as hypertension and diabetes. Nicotine and tobacco in cigarettes can stimulate MMP-9 which plays vital physiological roles in normal tissue growth and repair processes. This study aimed to find the correlation between taste threshold sensitivity and MMP-9, salivary secretion, blood pressure, and blood glucose levels in smoking and nonsmoking women. This was a cross-sectional study consisting of young adult women aged 18–24 years. Subjects were divided into two groups: the nonsmoking and smoking groups. In the combined data of both groups, the sweet taste threshold was correlated with age (r = 0.308, p=0.008), blood glucose levels (r = 0.238, p=0.043), and MMP-9 (r = –0.297, p=0.011). The salt taste threshold was only correlated with systolic blood pressure in the smoking (r = 0.440, p=0.032) and combined data groups (r = 0.260, p=0.026). By using partial correlation, it was shown that the relationship between the salt taste threshold and systolic blood pressure was influenced by smoking habits. The sweet taste threshold in women was found to correlate with age, blood glucose levels, and MMP-9 levels. On the other hand, there was a significant relationship between the salt taste threshold in women with systolic blood pressure, which was the only correlation analyzed in sthis study that was found to be influenced by smoking. However, both sweet and salt taste thresholds were not statistically correlated with salivary secretion.

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Sull, Alan, Serkan Inceoglu, Alicia August, Stephen Gregorius, and Montri D. Wongworawat. "Comparison of Barbed Sutures in Porcine Flexor Tenorrhaphy." HAND 11, no. 4 (July 7, 2016): 475–78. http://dx.doi.org/10.1177/1558944715626928.

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Background: Barbed suture use has become more popular as technology and materials have advanced. Minimal data exist regarding performance of the 2 commercially available products, V-LocTM and StratafixTM in tendon repairs. The purpose of this study was to compare gap resistance and ultimate tensile strength of both suture materials and nonbarbed suture in a porcine ex vivo model. Methods: Porcine flexor tendons were harvested and divided into 3 groups of 10 of varying suture material (3-0 PDS™, 3-0 V- V-Loc 180™, or 3-0 Stratafix™). A modified 4-strand cruciate technique was used to repair each tendon. Knotless repair was performed using barbed suture, whereas a buried 6-throw square knot was done using conventional suture. A servohydrolic tester was used for biomechanical testing of linear 2-mm gap resistance and maximum tensile strength. Results: No difference was found in 2-mm gap resistance among the 3 groups. No difference was found in ultimate tensile strength between V-Loc™ (76.0 ± 9.4 N) and Stratafix™ (68.1 ± 8.4 N) repairs, but the ultimate strength of the PDS™ control group (83.4 ± 10.0 N) was significantly higher than that of Stratafix™. Conclusions: Barbed (knotless) and nonbarbed suture repairs demonstrate equivalent 2-mm gap resistance. Stratafix™ repairs show slightly inferior performance to nonbarbed repairs in ultimate tensile strength, although this occurred at gap distances far beyond the 2-mm threshold for normal tendon gliding. Both barbed and nonbarbed 4-strand cruciate flexor tendon repairs may require peripheral repair to withstand physiologic loads.

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Plante, Ianik, Tony Slaba, Zarana Shavers, and Megumi Hada. "A Bi-Exponential Repair Algorithm for Radiation-Induced Double-Strand Breaks: Application to Simulation of Chromosome Aberrations." Genes 10, no. 11 (November 16, 2019): 936. http://dx.doi.org/10.3390/genes10110936.

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Background: Radiation induces DNA double-strand breaks (DSBs), and chromosome aberrations (CA) form during the DSBs repair process. Several methods have been used to model the repair kinetics of DSBs including the bi-exponential model, i.e., N(t) = N1exp(−t/τ1) + N2exp(−t/τ2), where N(t) is the number of breaks at time t, and N1, N2, τ1 and τ2 are parameters. This bi-exponential fit for DSB decay suggests that some breaks are repaired rapidly and other, more complex breaks, take longer to repair. Methods: The bi-exponential repair kinetics model is implemented into a recent simulation code called RITCARD (Radiation Induced Tracks, Chromosome Aberrations, Repair, and Damage). RITCARD simulates the geometric configuration of human chromosomes, radiation-induced breaks, their repair, and the creation of various categories of CAs. The bi-exponential repair relies on a computational algorithm that is shown to be mathematically exact. To categorize breaks as complex or simple, a threshold for the local (voxel) dose was used. Results: The main findings are: i) the curves for the kinetics of restitution of DSBs are mostly independent of dose; ii) the fraction of unrepaired breaks increases with the linear energy transfer (LET) of the incident radiation; iii) the simulated dose–response curves for simple reciprocal chromosome exchanges that are linear-quadratic; iv) the alpha coefficient of the dose–response curve peaks at about 100 keV/µm.

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Wong, Gane Ka-Shu, Zhiyong Yang, Douglas A. Passey, Miho Kibukawa, Marcia Paddock, Chun-Rong Liu, Lars Bolund, and Jun Yu. "A Population Threshold for Functional Polymorphisms." Genome Research 13, no. 8 (August 2003): 1873–79. http://dx.doi.org/10.1101/gr.1324303.

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We sequenced 114 genes (for DNA repair, cell cycle arrest, apoptosis, and detoxification)in a mixed human population and observed a sudden increase in the number of functional polymorphisms below a minor allele frequency of ∼6%. Functionality is assessed by considering the ratio in the number of nonsynonymous single nucletide polymorphisms (SNPs)to the number of synonymous or intron SNPs. This ratio is steady from below 1% in frequency—that regime traditionally associated with rare Mendelian diseases—all the way up to about 6% in frequency, after which it falls precipitously. We consider possible explanations for this threshold effect. There are four candidates as follows: (1)deleterious variants that have yet to be purified from the population, (2)balancing selection, in which a selective advantage accrues to the heterozygotes, (3)population-specific functional polymorphisms, and (4)adaptive variants that are accumulating in the population as a response to the dramatic environmental changes of the last 7,000∼17,000 years.

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Chlif, Mehdi, Mohamed Mustapha Ammar, Noureddine Ben Said, Levushkin Sergey, Said Ahmaidi, Fawaz Alassery, and Habib Hamam. "Mechanism of Dyspnea during Exercise in Children with Corrected Congenital Heart Disease." International Journal of Environmental Research and Public Health 19, no. 1 (December 23, 2021): 99. http://dx.doi.org/10.3390/ijerph19010099.

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This study will evaluate cardiorespiratory and peripheral muscle function and their relationship with subjective dyspnea threshold after the surgical correction of congenital heart disease in children. Thirteen children with surgically repaired congenital heart disease were recruited. Each participant performed an incremental exercise test on a cycle ergometer until exhaustion. Gas exchanges were continuously sampled to measure the maximal aerobic parameters and ventilatory thresholds. The functional capacity of the subjects was assessed with a 6 min walk test. At the end of the exercise test, isokinetic Cybex Norm was used to evaluate the strength and endurance of the knee extensor muscle in the leg. Dyspnea was subjectively scored with a visual analog scale during the last 15 s of each exercise step. Oxygen consumption measured at the dyspnea score/VO2 relationship located at the dyspnea threshold, at which dyspnea suddenly increased. Results: The maximal and submaximal values of the parameters describing the exercise and the peripheral muscular performances were: VO2 Peak: 33.8 ± 8.9 mL·min−1·kg−1; HR: 174 ± 9 b·min−1; VEmax: 65.68 ± 15.9 L·min−1; P max: 117 ± 27 W; maximal voluntary isometric force MVIF: 120.8 ± 41.9 N/m; and time to exhaustion Tlim: 53 ± 21 s. Oxygen consumption measured at the dyspnea threshold was related to VO2 Peak (R2 = 0.74; p < 0.01), Tlim (R2 = 0.78; p < 0.01), and the distance achieved during the 6MWT (R2 = 0.57; p < 0.05). Compared to the theoretical maximal values for the power output, VO2, and HR, the surgical correction did not repair the exercise performance. After the surgical correction of congenital heart disease, exercise performance was impeded by alterations of the cardiorespiratory function and peripheral local factors. A subjective evaluation of the dyspnea threshold is a reliable criterion that allows the prediction of exercise capacity in subjects suffering from congenital heart disease.

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Patle, Shikha, and Purushottam Kumar. "Threshold Oriented Preemptive Link Repair Decision based Approach for AODV in MANET." International Journal of Computer Applications 108, no. 6 (December 18, 2014): 1–6. http://dx.doi.org/10.5120/18912-0218.

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Finlayson, Samuel R. G., John D. Birkmeyer, Mark F. Fillinger, and Jack L. Cronenwett. "Should endovascular surgery lower the threshold for repair of abdominal aortic aneurysms?" Journal of Vascular Surgery 29, no. 6 (June 1999): 973–85. http://dx.doi.org/10.1016/s0741-5214(99)70238-7.

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Niu, Di, Quan Wang, Wei Li, Changxi Chen, Jiankai Xu, Lijuan Jiang, Chun Feng, et al. "The Influence of the Different Repair Methods on the Electrical Properties of the Normally off p-GaN HEMT." Micromachines 12, no. 2 (January 26, 2021): 131. http://dx.doi.org/10.3390/mi12020131.

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The influence of the repair process on the electrical properties of the normally off p-GaN high-electron-mobility transistor (HEMT) is studied in detail in this paper. We find that the etching process will cause the two-dimensional electron gas (2DEG) and the mobility of the p-GaN HEMT to decrease. However, the repair process will gradually recover the electrical properties. We study different repair methods and different repair conditions, propose the best repair conditions, and further fabricate the p-GaN HEMTs devices. The threshold voltage of the fabricated device is 1.6 V, the maximum gate voltage is 7 V, and the on-resistance is 23 Ω·mm. The device has a good performance, which proves that the repair conditions can be successfully applied to the fabricate of the p-GaN HEMT devices.

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Barrow, Aaron E., Shaquille J. C. Charles, Mohamad Issa, Ajinkya A. Rai, Jonathan D. Hughes, Bryson P. Lesniak, Mark W. Rodosky, Adam Popchak, and Albert Lin. "Distance to Dislocation and Recurrent Shoulder Dislocation After Arthroscopic Bankart Repair: Rethinking the Glenoid Track Concept." American Journal of Sports Medicine 50, no. 14 (December 2022): 3875–80. http://dx.doi.org/10.1177/03635465221128913.

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Background: The “distance to dislocation” (DTD) calculation has been proposed as 1 method to predict the risk of recurrent dislocation after arthroscopic Bankart repair for an “on-track” shoulder. Rates of recurrent dislocation at specific DTD values are unknown. Hypothesis: Among patients with “on-track” shoulder lesions who underwent primary arthroscopic Bankart repair, the rate of recurrent dislocation would increase as DTD values decrease. Study Design: Case-control study; Level of evidence, 3. Methods: We performed a retrospective analysis of 188 patients with “on-track” shoulder lesions who underwent primary arthroscopic anterior labral repair between 2007 and 2019, with a minimum 2-year follow-up. Glenoid bone loss, Hill-Sachs interval, glenoid track, and DTD were determined from preoperative magnetic resonance imaging scans. The rate of recurrent dislocation was determined at 2-mm DTD intervals. Univariate and multivariate regression analyses were used to evaluate the relationship between recurrent dislocation, patient characteristics, and bone loss variables. A multivariate regression model was created to predict the probability of failure at continuous DTD values. A subgroup analysis of failure rate based on collision sports participation was also performed. Results: A total of 29 patients (15.4%) sustained recurrent dislocations. Patient age ( P = .046), multiple dislocations ( P = .03), glenoid bone loss ( P < .001), Hill-Sachs interval length ( P < .001), and DTD ( P < .001) were all independent predictors of failure. As the DTD decreased, the rate of recurrent dislocation increased. Below a DTD threshold of 10 mm, the recurrent dislocation rate increased exponentially. Up to a threshold of 24 mm, the failure rate for collision athletes remained >12.3%, independent of the DTD. Conversely, the failure rate among noncollision athletes decreased steadily as the DTD increased. Conclusion: For “on-track” shoulder lesions, as the DTD approached 0 mm (“off-track” threshold), the risk of recurrent dislocation after arthroscopic Bankart repair increased significantly. Below a DTD threshold of 10 mm, the risk of failure increased exponentially. The risk of recurrent dislocation for collision sports athletes remained elevated at higher DTD values than for noncollision athletes.

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Journal articles on the topic 'Threshold repair'

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