Academic literature on the topic 'Inlays and underlay techniques'

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Journal articles on the topic "Inlays and underlay techniques"

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Neto, José Faibes Lubianca, Artur Koerig Schuster, João Pedro Neves Lubianca, and Roland Douglas Eavey. "Comparison of Inlay Cartilage Butterfly and Underlay Temporal Fascia Tympanoplasty." OTO Open 6, no. 3 (2022): 2473974X2211089. http://dx.doi.org/10.1177/2473974x221108935.

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Objective To systematically review the results of inlay cartilage butterfly tympanoplasty and standard underlay temporal fascia tympanoplasty for anatomic and functional end points. Data Sources PubMed, Embase, MEDLINE, and Virtual Health Library (VHL/Lilacs) databases were searched from inception through April 2, 2021. No restrictions on language, publication year, or publication status were applied. Review Methods The meta-analysis included data from articles that met inclusion criteria and were extracted by 2 authors independently. The PRISMA statement was followed. Risk of Bias 2.0 and Newcastle-Ottawa Scale were used to assess risk of bias. The primary outcome was tympanic membrane closure rate. The secondary outcome was improvement of the air-bone gap. Results Ten studies were included, 9 cohort studies and 1 randomized clinical trial, with 577 patients. The graft take rate was 82.8% in the butterfly cartilage inlay tympanoplasty group and 85.2% in the temporal fascia underlay tympanoplasty group (relative risk, 1.01; 95% CI, 0.93-1.11; I2 = 42%, P = .08). The air-bone gap reduction ranged from 6.1 to 11.28 in the butterfly cartilage inlay group and from 5.2 to 12.66 in the temporal fascia underlay group, with a mean difference between groups of −2.08 (95% CI, −3.23 to −0.94; I2 = 58%, P = .04), favoring temporal fascia underlay. Conclusion The 2 tympanoplasty techniques analyzed here produced similar results in terms of successful reconstruction of the tympanic membrane and reduction in the air-bone gap. Neither age nor follow-up length of time influenced outcomes.
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GI, Karrouf. "Repair of Large Abdominal Wall Defect Using Glycerolized Bovine Tunica Vaginalis and Prolene Mesh Implants in Dogs." International Journal of Veterinary Science and Research 3, no. 1 (2017): 001–7. https://doi.org/10.17352/ijvsr.000014.

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The repair of large abdominal defects remains a complex surgical problem of insufficient autogenous tissue for adequate reconstruction. The aim of the present study was to evaluate the uses of polypropylene mesh with glycerolized tunica vaginalis (GTV) for repairing abdominal wall defects in dogs using either inlay or underlay technique of implatations. Full thickness (all the layers of muscles except the skin) abdominal wall defects (6 x 10 cm) were created in 24 healthy mongrel dogs allocated into two main equal group (n=12 each) according to the type of the prosthetic material used. Each group is subdivided into two subgroup(n= 6 each).The present study indicated that, GTV Patches are considered to be a successful alternative for reinforcement and repair of large abdominal wall defects than prolene mesh based on postmortem findings,biomechanical analysis and histopathological examination.
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Basavaraj, Prashanth Kudure, Manjunatha H. Anandappa, Veena Prabhakaran, Nishtha Sharma, and Shreyas Karkala. "Comparative study between over underlay with classical underlay techniques of tympanoplasty." International Journal of Otorhinolaryngology and Head and Neck Surgery 6, no. 5 (2020): 918. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20201687.

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<p class="abstract"><strong>Background:</strong> The objective of the study was to compare the over underlay tympanoplasty technique with classical underlay tympanoplasty in terms of hearing impairment, graft acceptance and complications.</p><p class="abstract"><strong>Methods:</strong> 60 patients of chronic otitis media, mucosal, inactive, aged between 16-60 years who presented to ENT OPD with small, medium, large and subtotal perforations having mild to moderate conductive hearing loss were included in the study. After taking informed consent, patients were randomly divided into 2 groups containing 30 patients each. In group A, graft was placed medial to the handle of malleus and medial to the annulus (underlay technique), while in group B, graft was placed lateral to the handle of malleus and medial to the annulus (over underlay technique). Both groups were reviewed after 6 months. Pre-operative and post-operative air bone gap were compared. Surgery was considered successful based on post-operative graft uptake, hearing improvement and maintenance of middle ear space. </p><p class="abstract"><strong>Results:</strong> In group A, re-perforation was seen in 8 cases (26.7%) whereas only 3 cases (10%) in group B had re-perforation. Medialization was noted among 4 patients in group A (13.3%), and was absent in group B. Lateralization was absent in both the groups. Post-operative hearing threshold in group A was 6.2±4.56 dB and in group B was 11.45±7.38 dB.</p><p class="abstract"><strong>Conclusions:</strong> Over underlay tympanoplasty is a safer technique as compared to classical underlay, showing lower rates of re-perforation or medialization and a significant improvement in hearing. Hence over-underlay is an effective method, having higher success rates.</p>
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Pandey, Rajesh, Abhishek Kumar Barnwal, and Anil Kumar Yadav. "A Comparative Study of Full Cuff Underlay and Over-underlay Tympanoplasty." Indian Journal of Otology 29, no. 4 (2023): 251–54. http://dx.doi.org/10.4103/indianjotol.indianjotol_5_23.

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Background: Various modifications in tympanomeatal flap elevation in tympanoplasty were described by otolaryngologist all over the world to achieve best surgical outcome. In this study, the surgical and audiological outcomes of circumferential (full cuffed) tympanomeatal flap elevation and over-under technique of flap elevation were compared in type 1 tympanoplasty. Objective: The aim of this study is to compare surgical outcomes of two techniques of tympanomeatal flap elevation in tympanoplasty. Materials and Methods: This prospective randomized study included 200 patients. Patients were randomly allocated in 2 groups. Patients were followed for 3 months and compared surgical and audiological outcomes in 2 groups. Results: In full-cuffed underlay (Group A) techniques, the overall success (97.3%) and anterior blunting (9.1%) were more, whereas residual perforation (2.7%), granulation formation (2.7%), and lateralization (0.0%) were less common as compared to over-underlay technique (Group B). In over-underlay technique (Group B), success, residual perforation, lateralization, and anterior blunting were seen in 82.2%, 17.8%, 4.4%, and 2.2%, respectively. Conclusion: Both full-cuffed underlay and over-underlay techniques of tympanoplasty are effective surgical technique with satisfactory outcome.
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S. G., Mahesh, Vishwas K. Pai, Pallavi Pavithran, and Nithin P. S. "Myringoplasty: underlay versus overlay techniques- a comparative study." International Journal of Otorhinolaryngology and Head and Neck Surgery 4, no. 2 (2018): 381. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20180697.

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<p class="abstract"><strong>Background:</strong> <span lang="EN-IN">Chronic suppurative otitis media is an inflammation of the mucoperiosteal lining of the middle ear cleft. 10% of Indian population suffers from hearing impairment. </span></p><p class="abstract"><strong>Methods:</strong> <span lang="EN-IN">The study comprises of 60 patients admitted in the department of ENT and head and neck surgery, AJIMS, Mangalore between June 2015 and May 2017. All patients suffered from CSOM, tubotympanic type. Selection criteria was patients with CSOM, TTD type with no or minimal SNHL, AB gap more than 20dB, absence of ossicular defects, no history of previous ear surgery and was operated on worse hearing ear. Exclusion criteria were atticoantral disease, ossicular defects, previous ear surgery, otomycosis and systemic diseases. </span></p><p class="abstract"><strong>Results:</strong> <span lang="EN-IN">The majority of the patients were between the age group of 20-40 years. Out of the 60 patients, 28 were male and 32 female. 8 patients with moderate size and 20 with large perforations underwent underlay myringoplasty. For onlay corresponding numbers were 17 and 13. 26 patients (86.7%) who underwent underlay and 27 patients (90%) who underwent overlay had good hearing improvement. 43.3% of the group had significant hearing improvement at 6 months follow up. 20 patients had pneumatised and 40 patients had sclerotic mastoids in the study. Graft take up was 90% for underlay and 96.6% for overlay. The hearing loss was more with larger perforations.18 patients with large perforations who underwent underlay had good hearing improvement versus 13 for overlay whereas for moderate perforations, only 8 patients had good hearing improvement for underlay versus 15 for overlay. </span></p><p class="abstract"><strong>Conclusions:</strong> <span lang="EN-IN">The hearing improvement obtained with underlay and overlay myringoplasty are comparable. The cellularity of mastoid has no influence on the hearing improvement. The size of the perforation correlates well with the degree of hearing loss. Underlay myringoplasty seems to give better results for large perforations, overlay for moderate sized ones.</span></p><p class="abstract"> </p>
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Kamil, Shahnawaz, Alok Abhijeet, and Kumar Anil. "Comparative Evaluation of the Marginal Adaptation of Emax Ceramic Inlays Fabricated using Traditional Rubber Base and Digital Impression Technique in Permanent Premolar: An in Vitro Study." International Journal of Pharmaceutical and Clinical Research 16, no. 5 (2024): 2983–86. https://doi.org/10.5281/zenodo.13823883.

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<strong>Background:&nbsp;</strong>Emax ceramic inlays are widely used in restorative dentistry due to their excellent aesthetic and mechanical properties. The accuracy of marginal adaptation is crucial for the longevity and clinical success of these restorations. Traditional rubber base impression techniques have been the standard for years, but digital impression techniques have recently gained popularity due to their potential for higher precision.&nbsp;<strong>Aim:&nbsp;</strong>This study aimed to compare the marginal adaptation of Emax ceramic inlays fabricated using traditional rubber base and digital impression techniques in permanent premolars.&nbsp;<strong>Methods:&nbsp;</strong>An in vitro study was conducted on 90 extracted human permanent premolars, divided into two groups: Group A (n = 45) using traditional rubber base impressions and Group B (n = 45) using digital impressions. Emax ceramic inlays were fabricated for all teeth, and marginal adaptation was measured using a stereomicroscope. Data were analyzed using SPSS version 23.0, with descriptive statistics and an Independent Samples t-test used to compare the groups.&nbsp;<strong>Results:&nbsp;</strong>The mean marginal gap was significantly smaller in the digital impression group (51.0 &plusmn; 5.7 &micro;m) compared to the traditional rubber base group (75.3 &plusmn; 8.1 &micro;m), with a p-value of &lt;0.001, indicating superior marginal adaptation in the digital group.&nbsp;<strong>Conclusion:&nbsp;</strong>Digital impression techniques result in significantly better marginal adaptation of Emax ceramic inlays compared to traditional rubber base methods. This suggests that digital techniques should be preferred for the fabrication of ceramic inlays to enhance clinical outcomes.&nbsp;<strong>Recommendations:&nbsp;</strong>Based on the findings, it is recommended that dental practitioners consider adopting digital impression techniques to improve the accuracy and longevity of ceramic restorations. &nbsp; &nbsp; &nbsp;
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Saha, Rony Kumer. "Power-Domain Based Dynamic Millimeter-Wave Spectrum Access Techniques for In-Building Small Cells in Multioperator Cognitive Radio Networks toward 6G." Wireless Communications and Mobile Computing 2021 (May 3, 2021): 1–13. http://dx.doi.org/10.1155/2021/6628751.

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Power-domain based dynamic spectrum access (PDSA) techniques are proposed for sharing 28 GHz spectrum of any Mobile Network Operator (MNO) with in-building small cells (SCs) of the other countrywide. By controlling the transmission power of SCs, PDSA techniques explore the traditional interweave access by operating an SC at the maximum transmission power and the underlay access by allowing to operate an SC at a lowered transmission power separately, as well as jointly. Average capacity, spectral efficiency, energy efficiency, cost efficiency, and throughput per SC user equipment (UE) are derived for an arbitrary number of MNOs in a country. By varying the spectrum reuse factor for the millimeter-wave spectrum in each building of SCs, extensive numerical and simulation results and analyses for an illustrative scenario of a country consisting of four MNOs are carried out for the interweave and underlay techniques when applying separately, as well as the hybrid interweave-underlay technique and the static licensed spectrum allocation (SLSA) technique. It is shown that, due to gaining more shared spectra, the hybrid interweave-underlay technique provides the best, whereas the SLSA provides the worst, performances of all techniques in terms of the average capacity, spectral efficiency, energy efficiency, cost efficiency, and throughput per UE of an SC. Moreover, we show that the hybrid interweave-underlay technique, the interweave technique, and the underlay technique, respectively, can satisfy the expected requirements of spectral and energy efficiencies for Sixth-Generation (6G) networks by reusing each MNO’s 28 GHz spectrum to SCs of about 33.33%, 50%, and 50% less number of buildings than that required by the SLSA for a spectrum reuse factor of six per building of small cells.
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Hossain, Mohammad Delwar, Md Mahbubur Rahman, AKM Asaduzzaman, Mohammad Misbah Al Kabir Sumon, and Mohammad Shahadutth Ullah. "Outcomes of Underlay Versus Over-Underlay Technique myringoplasty." Bangladesh Journal of Otorhinolaryngology 23, no. 2 (2020): 133–39. http://dx.doi.org/10.3329/bjo.v23i2.45143.

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Objective: In this study, the two methods of myringoplasty (underlay and over-underlay technique) were compared.&#x0D; Methods: Total 100 patients of COM (inactive mucosal variety) were studied for 06 months duration from 1st Oct 2015 to 31st March 2016 in the Dept of ENT &amp; Head Neck Surgery, CMH Dhaka. The diagnosed cases of COM patients were selected according to the eligibility criteria’s by purposive sampling. 100 patients were equally divided into two groups. Patients in group1 underwent underlay method and patients in group 2 underwent over-underlay technique of myringoplasty. Patients were followed up for 6 months.&#x0D; Results: Graft uptake and hearing improvement was compared in both groups. In group 1 (underlay myringoplasty) graft taken rate was 92% and graft failure rate was 8%. In group 2 (Over-underlay myringoplasty) graft taken rate was 94% and failure rate was 6%. Graft uptake was 2% lower in the group1 than group 2 .The gain in hearing threshold (gain in A-B gap) in the group 1 (underlay myringoplasty) was (23.74 dB ± 3.97) and in group 2 )over-underlay myringoplasty) was (23.64 dB ± 4.03)&#x0D; Conclusion: The present study emphasizes the fact that there is no significant difference in short term results between the two techniques (underlay and over-underlay).&#x0D; Bangladesh J Otorhinolaryngol; October 2017; 23(2): 133-139
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Munjal, Manish, Nitin Mathur, Parth Chopra, et al. "Air bone closure and graft uptake, vis a vis tympanic reconstitution." International Journal of Otorhinolaryngology and Head and Neck Surgery 6, no. 11 (2020): 2094. http://dx.doi.org/10.18203/issn.2454-5929.ijohns20204637.

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&lt;p class="abstract"&gt;&lt;strong&gt;Background:&lt;/strong&gt; Tympanoplasty involves reconstitution of the tympano-ossicular system with commonly. fascia of the temporalis muscle, situated in its proximity. The fascia is grafted on the residual tympanic membrane by placing it either over it or below it, after creating a raw surface. The former is the overlay and latter, the underlay technique. In this study on restitution of the ear drum utilizing the overlay and underlay techniques, an exhaustive analysis of the two modalities has been done, taking into consideration various variables individually. The surgical outcome wrt to graft uptake and hearing gain has been compared in "depth" with extensive studies undertaken in India and abroad. The unbiased tabulated comparison of each aspect is unique and would guide future researchers to opt the ideal modality.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Methods:&lt;/strong&gt; Tympanoplasty was undertaken in chronic safe suppurative otitis media with the underlay and overlay techniques in a study group of 40 patients in this prospective study. The patients were randomly divided into equal groups for either procedure. &lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Results:&lt;/strong&gt; In the cohort of 40 subjects successful graft uptake was observed in 16 (80%) with overlay technique and 17 (85%) with underlay technique. Graft rejection was reported in 4 (20%) and 3 (15%) cases with overlay and underlay techniques respectively. Hearing improvement was 56.25% in 10-20 dB range in Overlay. Whereas, with underlay it was 47.05% in 10-2 dB.&lt;/p&gt;&lt;p class="abstract"&gt;&lt;strong&gt;Conclusions:&lt;/strong&gt; Overlay technique is ideal for anterior and central perforations while underlay for subtotal and posterior perforations. In terms of hearing improvement, the fibrosis during graft uptake makes the results of either technique unpredictable.&lt;/p&gt;
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Petrova, Viktoria, Radosveta Vasileva, and Janet Kirilova. "ADAPTATION OF COMPOSITE CAD/CAM INLAYS FABRICATED BY DIFFERENT METHODS: AN IN VITRO MICRO-CT STUDY." Journal of IMAB - Annual Proceeding (Scientific Papers) 29, no. 4 (2023): 5265–71. http://dx.doi.org/10.5272/jimab.2023294.5265.

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Purpose: Indirect restorations can be performed using different impression techniques (conventional, laboratory, or intraoral scanners). Their accuracy determined their longevity. This study compares the marginal and internal adaptation of milled CAD/CAM composite inlays fabricated by conventional, hybrid, and digital methods. Material and methods: Thirty human premolars were prepared for MOD composite inlays(CI). They were divided into three equal groups depending on the process of fabrication: Group 1 (conventional group)— impression and laboratory-fabricated CI, Group 2 (hybrid group)— impression, laboratory scanner and milled CAD/CAM CI, and Group 3(digital group)— digital impression (intraoral scanner) and milled CAD/CAM CI. The marginal gap (MG), absolute marginal discrepancy (AMD), and internal gap (IG) were measured at 120 different points per CI using X‐ray microtomography. The data were analyzed using Kolmogorov–Smirnov and Mann–Whitney U tests. Results: The conventional and digital composite inlays present significantly smaller marginal and internal gaps than the CAD/CAM group manufactured by hybrid methods. Conclusions: Within the limitations of this in vitro study, we concluded that the CAD-CAM composite inlays fabricated by digital method exhibited statistically better marginal and internal adaptation results than composite CAD-CAM inlays by hybrid methods. The composite CAD-CAM inlays made by digital methods are an alternative to those made by a conventional methodology.
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Dissertations / Theses on the topic "Inlays and underlay techniques"

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Menon, Rekha. "Interference Avoidance based Underlay Techniques for Dynamic Spectrum Sharing." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27536.

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Dynamic spectrum sharing (DSS) is a new paradigm for spectrum allocation that is expected to lead to more efficient spectrum usage and alleviate the spectrum-scarcity that has been perceived in recent years. DSS refers to the opportunistic, dynamic, and uncoordinated use of the spectrum by multiple, possibly non-cooperating, systems. It allows bands which may be underutilized by incumbent or legacy systems to be shared by agile or cognitive radios on a ``do no harm" basis. An ideal DSS technique is one which efficiently uses the allocated spectrum and maximizes the performance of the DSS network while causing no interference to the legacy radio system with which it coexists. We address this issue in our work by investigating desirable features for DSS with respect to the impact on a legacy radio system as well as the performance of a DSS network. It is found that ``ideal" DSS techniques with respect to both objectives are characterized by the removal of the strongest interferers in the system and averaging of the remaining interference. This motivates the use of an interference avoidance (IA) based underlay technique for DSS. The performance benefit provided by this technique, over an IA-based overlay technique, is shown to increase with the transmission bandwidth available to the DSS system. It is also shown that this technique is more robust to inaccuracies in the system knowledge required for implementing IA. An example of an IA-based underlay technique is a spreading-sequence-based transmission scheme that employs sequence adaptation to avoid interference. We use game-theoretic tools to design such schemes for distributed or ad hoc networks. The designed schemes can also be used to avoid interfering with other agile or static radios. We then extend this work to Ultra Wideband systems which can maximally exploit the gains from the proposed scheme due to the large transmission bandwidths.<br>Ph. D.
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Kumar, Bhupendra. "Performance of an underlay cooperative cognitive networks with a buffer-aided-relay." Thesis, IIT, Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8070.

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Books on the topic "Inlays and underlay techniques"

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Benson, Jonathan. Woodworker's Guide to Veneering & Inlay: Techniques, Projects & Expert Advice for Fine Furniture Recreate the Beauty of Exotic Woods with the Creativity of Veneers & Inlays. Fox Chapel Publishing, 2008.

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Shrock, Dennis. Choral Monuments. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780190469023.001.0001.

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This book provides extensive and in-depth material about eleven epoch-making choral masterworks that span the history of Western culture from the Renaissance to the modern era. Included are Missa Pange lingua (Josquin Desprez); Missa Papae Marcelli (G. P. da Palestrina); B Minor Mass (J. S. Bach); Messiah (G. F. Handel); The Creation (Joseph Haydn); Symphony no. 9 (Ludwig van Beethoven); St. Paul (Felix Mendelssohn); Ein deutsches Requiem (Johannes Brahms); Messa da Requiem (Giuseppe Verdi); Mass (Igor Stravinsky); and War Requiem (Benjamin Britten). The works are presented in separate chapters, with each chapter divided into three basic sections—history, analysis, and performance practice. Discussions of history include biographical information about composers related to the work at hand, historical perspectives, and text sources. Analyses are focused on formal and musical structures, salient compositional techniques, and elements of music particular to the work being discussed, including parody and motivic organization. The discussion of performance practices includes primary source quotations about a wide range of topics, from performing forces, tempo, and phrasing of each work to specific issues such as tactus, text underlay, musica ficta, metric accentuation, rhythmic alteration, recitative, fermatas, and ornamentation. Musical examples and primary source quotes illuminate the material.
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Book chapters on the topic "Inlays and underlay techniques"

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Kuhn, Jeffery J. "Tympanoplasty, Underlay and Overlay Techniques." In Encyclopedia of Otolaryngology, Head and Neck Surgery. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-23499-6_654.

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Song, Lingyang, Zhu Han, and Chen Xu. "Physical-Layer Techniques." In Resource Management for Device-to-Device Underlay Communication. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8193-5_2.

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Patel, Rachit, and Rajeev Arya. "Resource allocation for D2D underlay communication in 6G networks considering 3D distance path loss model." In Intelligent Computing and Communication Techniques. CRC Press, 2025. https://doi.org/10.1201/9781003530190-39.

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"23 Underlay and Related Techniques." In The Chronic Ear, edited by John L. Dornhoffer and Michael B. Gluth. Georg Thieme Verlag, 2016. http://dx.doi.org/10.1055/b-0036-129795.

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"The In-lay Underlay Techniques." In Cartilage Tympanoplasty, edited by Mirko Tos. Georg Thieme Verlag, 2009. http://dx.doi.org/10.1055/b-0034-65487.

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Govind, Nikhil. "Third Study." In Inlays of Subjectivity. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780199498727.003.0003.

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The third chapter takes up this tradition of the developmental novel (the bildung), and seeks to understand it in its canonical form in India. In this context, it looks at two of the most influential such novels in India, both published in the 1940s—Agyeya’s Shekhar and Ismat Chughtai’s The Crooked Line. The former, though essentially a story from childhood to the twenties of the protagonist also plays with the form of the novel—there is experimentation with non-linear storytelling, with fragmentation and ellipsis. Such techniques convey the darkness of the protagonist—the novel begins with the intimation that he is to be hanged (hanging also evokes the first chapter). Chughtai’s work is also a bildung, though in a playful mode that nevertheless invokes the difficulties of establishing a working-woman protagonist from a conservative milieu.
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Melgar, Emiliano, Emiliano Gallaga, and Reyna Solis. "Manufacturing Techniques of Pyrite Inlays in Mesoamerica." In Manufactured Light: Mirrors in the Mesoamerican Realm. University Press of Colorado, 2016. http://dx.doi.org/10.5876/9781607324089.c003.

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León, Francisco. "Corneal Inlays for Presbyopia and Femtosecond Laser Implantation." In Femtosecond Laser: Techniques and Technology. Jaypee Brothers Medical Publishers (P) Ltd., 2012. http://dx.doi.org/10.5005/jp/books/11632_7.

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"Indications for Cartilage Strips in Underlay Techniques." In Cartilage Tympanoplasty, edited by Mirko Tos. Georg Thieme Verlag, 2009. http://dx.doi.org/10.1055/b-0034-65339.

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"Underlay Techniques with Foils and Thin Plates." In Cartilage Tympanoplasty, edited by Mirko Tos. Georg Thieme Verlag, 2009. http://dx.doi.org/10.1055/b-0034-65378.

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Conference papers on the topic "Inlays and underlay techniques"

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Ling, Y. K. "Capacity of intelligent underlay and overlay network." In IEE Colloquium on Advanced TDMA Techniques and Applications. IEE, 1996. http://dx.doi.org/10.1049/ic:19961234.

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Abboud, Osama, Aleksandra Kovacevic, Kalman Graffi, Konstantin Pussep, and Ralf Steinmetz. "Underlay awareness in P2P systems: Techniques and challenges." In Distributed Processing (IPDPS). IEEE, 2009. http://dx.doi.org/10.1109/ipdps.2009.5160955.

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Khan, Imtiyaz, and Poonam Singh. "Performance comparison of modulation techniques for underlay cognitive radio transceivers." In International Conference on Communication and Electronics System Design, edited by Vijay Janyani, M. Salim, and K. K. Sharma. SPIE, 2013. http://dx.doi.org/10.1117/12.2009099.

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Donavin, Paul, S. Marlette, W. Bamford, K. Stuckey, and G. Poling. "Technical Basis for Case N-766 Nickel Alloy Reactor Coolant Inlay and Onlay for Mitigation of PWR Full Penetration Circumferential Nickel Alloy Welds in Class 1 Items." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-26164.

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Primary Water Stress Corrosion Cracking (PWSCC) has been observed in pressurized water reactor (PWR) coolant system pressure boundary components. Recently this cracking has been observed in Alloy 82/182 butt welds. Various repair and mitigation schemes have been proposed or employed to address this cracking. Case N-766 was developed as an alternative method for PWSCC mitigation. It is especially useful for applications in PWSCC susceptible regions where accessibility to the outer surfaces for performing other PWSCC mitigation techniques are difficult or impractical. The method in Case N-766 involves isolating the PWSCC susceptible material from its environment, in this case PWR reactor coolant fluid, thereby eliminating one of the three (3) simultaneous conditions that must exist for PWSCC to occur. Inlays provide for mitigation of flaws or repair of existing flaws and also permit maintaining the inside surface contour essentially in its original configuration, without flow path restriction. Onlays, which do not require an excavation into the pipe ID, permit maintaining the inside surface contour essentially in its original configuration, or permitting weld buildup on the inside surface. This paper presents the technical basis for the design, fabrication, and inspection requirements for inlays and onlays.
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Reba, P., G. Umamaheswari, and G. Suchitra. "Performance Investigation of Interference Alignment Techniques for Underlay MIMO Cognitive Radio Networks." In 2018 15th IEEE India Council International Conference (INDICON). IEEE, 2018. http://dx.doi.org/10.1109/indicon45594.2018.8987130.

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Brust, F. W., D. J. Shim, E. Punch, S. Kalyanam, and D. Rudland. "Natural PWSCC Crack Growth in Dissimilar Metal Welds With Inlay." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-26108.

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The commercial nuclear power industry has proposed several mitigation techniques to address safety concerns due to primary water stress corrosion cracking (PWSCC) in nickel-based dissimilar metal (DM) welds (specifically Alloy 82/182 welds) in pressurized water reactors (PWRs). Since many of these welds reside in primary piping systems that have been approved for Leak-Before-Break (LBB), the mitigation strategies chosen must ensure that these systems still satisfy the LBB criteria. Mechanical Stress Improvement Process (MSIP), Full and Optimized Structural Weld Overlay (FSWOL, OWOL), and Inlay and Onlay cladding are examples of the currently proposed mitigation methods. This paper focuses on an evaluation of the inlay process for the mitigation of PWSCC since it may be the technique of choice for the large-diameter reactor coolant nozzles. Currently the ASME Section XI code is developing Code Case N-766 ‘Nickel Alloy Reactor Coolant Inlay and Cladding for Repair or Mitigation of PWR Full Penetration Circumferential Nickel Alloy Welds in Class 1 Items.’ This code case is documenting the procedures for applying inlay welds. The residual stresses caused by the inlay process were used to model the natural crack growth through the inlay in this paper. The inlay residual stresses and modeling methods are presented in a companion paper. Since the PWSCC crack growth rate is much slower in the inlay material (Alloy 52) compared with the Alloy 82/182 weld metal, the crack growth shape retains a ‘bubble’ appearance. This shape is a challenge to model within the framework of advanced finite element based natural crack growth methods. This paper focuses on the crack growth modeling challenges, the actual growth shapes for different weld repair and inlays processes, and finally compares crack growth rates to those made using a simple crack growth shape.
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7

Schuerhoff, Joerg, Andrei Ghicov, and Karsten Sattler. "Advanced Water Droplet Erosion Protection for Modern Low Pressure Steam Turbine Steel Blades." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43140.

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Blades for low pressure steam turbines operate in flows of saturated steam containing water droplets. The water droplets can impact rotating last stage blades mainly on the leading edge suction sides with relative velocities up to several hundred meters per second. Especially on large blades the high impact energy of the droplets can lead to a material loss particularly at the inlet edges close to the blade tips. This effect is well known as “water droplet erosion”. The steam turbine manufacturer use several techniques, like welding or brazing of inlays made of erosion resistant materials to reduce the material loss. Selective, local hardening of the blade leading edges is the preferred solution for new apparatus Siemens steam turbines. A high protection effect combined with high process stability can be ensured with this Siemens hardening technique. Furthermore the heat input and therewith the geometrical change potential is relatively low. The process is flexible and can be adapted to different blade sizes and the required size of the hardened zones. Siemens collected many years of positive operational experience with this protection measure. State of the art turbine blades often have to be developed with precipitation hardening steels and/or a shroud design to fulfill the high operational requirements. A controlled hardening of the inlet edges of such steam turbine blades is difficult if not impossible with conventional methods like flame hardening. The Siemens steam turbine factory in Muelheim, Germany installed a fully automated laser treatment facility equipped with two co-operating robots and two 6 kW high power diode laser to enable the in-house hardening of such blades. Several blade designs from power generation and industrial turbines were successfully laser treated within the first year in operation. This paper describes generally the setup of the laser treatment facility and the application for low pressure steam turbine blades made of precipitation hardening steels and blades with shroud design, including the post laser heat treatments.
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Yamaguchi, Takahiro, Hajime Kimura, Atsushi Sakuma, Kazushige Takahashi, and Shigetoshi Mimura. "Material and Posture Modeling for Sleeping on Soft Low-Density Porous Material." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87249.

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Sleeping is one of the most important factors that influence the quality of human life, and this state of existence should be thoroughly investigated to improve the quality of the life. The mechanical design of bedding has great influence on the comfort of a mattress. Thus, objective and conventional techniques to evaluate the mechanics of mattress comfort could help improve the quality of sleep. In this report, an analysis technique for the assessment of the sleeping posture of humans is presented to facilitate the development of mattress design technology. Herein, an analytical model which imitates the human body has been formulated to determine the design parameters of a mass-spring-joint system on a soft underlay. The physical model is composed of five components that represent the head, chest, hip, femur, and calf, with each body part being represented by a simple ball model. The spring joint connecting the five parts reflects the neck, lumbar, hip, and knee joints. The specifications of the body model are determined by actual measurements and previous studies. In order to determine the physical properties of the mattress, two types of mattress urethane foam material are tested using the ball indenter method. The parameters include Young’s modulus, plateau stress, and other physical parameters. Variation due to the type of mattress has been observed in the laying test using a pressure distribution sensor sheet. In the analysis performed using the physical model, the variation in the lying posture and the extent of body sinking are observed to be the same during experiments. Both variations are compared using the change in force distribution in each body part. In conclusion, it was found that the observed changes in distribution are the same in the experimental and physical models. Therefore, the proposed model reliably reflects the design characteristics of the mattress.
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