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Articoli di riviste sul tema "Instrumentation"

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Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 7 luglio 2024

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1

Suherman, Suherman, Ghilma Milawonso, Kinichi Morita, Hitoshi Mizuguchi e Yuji Oki. "Statistical Evaluation of Conventional and Portable Instrumentations for Cr(VI) Analysis on Chemistry Laboratory Waste Water". Key Engineering Materials 840 (aprile 2020): 406–11. http://dx.doi.org/10.4028/www.scientific.net/kem.840.406.

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The development of portable instrumentation for heavy metals analysis was increased rapidly. However, the quality of data from portable methods has so far been questioned when compared to conventional instrumentation. In this research, a comparative study of conventional and portable instrumentations for Cr(VI) analysis on liquid waste water of Chemistry Laboratory at Universitas Gadjah Mada (UGM) was conducted. This research started with validation and statistical evaluation of instrumentation methods which are UV-Visible spectrophotometer, portable spectrophotometer (PiCOEXPLORER) and Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-AES). The validation methods consist of determination of linearity, sensitivity, limit of detection and limit of quantification. The results showed that the validation methods of ICP-AES were better than PiCOEXPLORER and UV-Vis spectrophotometer. Based on t-test, it was obtained that the result of Cr(VI) analyses with the comparison of UV-Vis and PiCOEXPLORER, ICP-AES and PiCOEXPLORER, and UV-Vis and ICP-AES; there were no significant difference (tcount< ttable). The ANOVA test (F test) results showed that the Fcount value is less than Ftable so that the results of Cr(VI) analysis in the standard solution and liquid waste samples measured by three instrumentations. Thus, it was concluded that portable instrumentations was good and gives the same quality as conventional instrumentations (UV-Vis and ICP AES).

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2

Souza, Bianca Katsumata de, Murilo Priori Alcalde, Marco Antonio Hungaro Duarte, Maria Aparecida Andrade Moreira Machado, Thais Marchini Oliveira e Natalino Lourenço Neto. "Shaping ability of a pediatric motor-driven instrumentation system in primary molar root canal prototypes". Brazilian Dental Journal 34, n. 5 (ottobre 2023): 36–42. http://dx.doi.org/10.1590/0103-6440202305372.

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Abstract Evaluate the shaping ability and preparation time using a pediatric motor-driven rotary instrumentation compared to other systems in resin prototypes of primary molars. Methods: Thirty specimens were scanned in micro-CT and divided into three groups according to the instrumentation type: pediatric motor-driven Sequence baby File (SBF); conventional motor-driven (Sequence Rotary File - SRF); manual K file. Instrumentation time was timed. After preparation, the specimens were scanned again. The pre- and post-instrumentation images were superimposed to measure the amount of root canal deviation and the resin remnant thickness. ANOVA followed by the Tukey test analyzed the comparisons between groups (p<0.05). Results: No statistically significant differences occurred in root canal deviation among groups (p>0.05). There were statistically significant differences in the comparison among root thirds (p<0.001) but without significant differences in the interaction group vs. root third (p>0.05). Both motor-driven instrumentations showed statistically greater weariness than manual instrumentation (p<0.001), without significant significant differences between SBF and SRF. Motor-driven instrumentation had a shorter working time than manual instrumentation (p<0.001). Conclusion: Pediatric motor-driven instrumentation demonstrated good outcomes in relation to root canal deviation and amount of remnant structure, with shorter instrumentation time. SBF can be a suitable alternative for endodontic instrumentation in primary molars.

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3

Darbre, Georges R. "Instrumentation de barrages par accélérographes". Canadian Journal of Civil Engineering 22, n. 1 (1 febbraio 1995): 150–63. http://dx.doi.org/10.1139/l95-014.

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A better understanding of the dynamic behaviour of dams requires strong-motion instrumentations. In particular, it is necessary to observe the free-field motions at the dam sites and the effective motions along the abutments, and to determine the dynamic properties of dams and their response to severe earthquakes. Instrumentation schemes are developed for arch dams, gravity dams and embankment dams, considering specific observational needs and objectives. The technical specifications to be satisfied by the accelerographs and the arrays are developed. Four arrays, which have been installed in Swiss dams ranging in height from 120 to 285 m, for a total of 29 triaxial accelerographs, are also presented. Key words: earthquakes, strong motions, instrumentation, accelerographs, dams.

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4

Gaston, Camino Willhuber, Taype Zamboni Danilo, Carabelli Guido, Barla Jorge e Sancineto Carlos. "Migration of the Anterior Spinal Rod to the Right Thigh, a Rare Complication of Anterior Spinal Instrumentations: A Case Report and a Literature Review". Case Reports in Orthopedics 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/532412.

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Posterior and anterior fusion procedures with instrumentation are well-known surgical treatments for scoliosis. Rod migration has been described as unusual complication in anterior spinal instrumentations; migration beyond pelvis is a rare complication. A 32-year-old female presented to the consultant with right thigh pain, rod migration was diagnosed, rod extraction by minimal approach was performed, and spinal instrumentation after nonunion diagnosis was underwent. A rod migration case to the right thigh is presented; this uncommon complication of spinal instrumentation should be ruled out as unusual cause of sudden pain without any other suspicions, and long-term follow-up is important to prevent and diagnose this problem.

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5

Shih, Kao-Shang, Ching-Chi Hsu, Shu-Yu Zhou e Sheng-Mou Hou. "BIOMECHANICAL INVESTIGATION OF PEDICLE SCREW-BASED POSTERIOR STABILIZATION SYSTEMS FOR THE TREATMENT OF LUMBAR DEGENERATIVE DISC DISEASE USING FINITE ELEMENT ANALYSES". Biomedical Engineering: Applications, Basis and Communications 27, n. 06 (dicembre 2015): 1550060. http://dx.doi.org/10.4015/s101623721550060x.

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Fusion has been the gold standard treatment for treating lumbar degenerative disc disease. Many clinical studies have demonstrated that adjacent segment degeneration was observed in patients over time. Various instrumentations of pedicle screw-based stabilization systems have been investigated using numerical approaches. However, numerical models developed in the past were simplified to reduce computational time. The aim of this study was to evaluate and to compare the biomechanical performance of rigid, semi-rigid, and dynamic posterior instrumentations using a more realistic numerical model. Three-dimensional nonlinear finite element models of the T11-S1 multilevel spine with various posterior instrumentations were developed. The intersegmental rotation, the maximum disc stress, and the maximum implant stress were calculated. The results indicated that the rigid instrumentation resulted in greater fixation stability but also a greater risk of adjacent segment degeneration and implant failure. The biomechanical performance of the dynamic instrumentation was closer to that of the intact spine model compared with the rigid and semi-rigid instrumentations. The results of this study could help surgeons understand the biomechanical characteristics of different posterior instrumentations for the treatment of lumbar degenerative disc diseases.

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6

Schröder, Gesine. "Instrumentation". Zeitschrift der Gesellschaft für Musiktheorie [Journal of the German-Speaking Society of Music Theory] 1–2, n. 2/2–3 (2005): 239–42. http://dx.doi.org/10.31751/531.

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7

Brauman, J. I. "Instrumentation". Science 260, n. 5113 (4 giugno 1993): 1407. http://dx.doi.org/10.1126/science.260.5113.1407.

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8

&NA;. "INSTRUMENTATION". Clinical Nuclear Medicine 24, n. 10 (ottobre 1999): 827. http://dx.doi.org/10.1097/00003072-199910000-00037.

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9

&NA;. "INSTRUMENTATION". Clinical Nuclear Medicine 24, n. 11 (novembre 1999): 909. http://dx.doi.org/10.1097/00003072-199911000-00034.

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10

&NA;. "INSTRUMENTATION". Clinical Nuclear Medicine 24, n. 12 (dicembre 1999): 1006. http://dx.doi.org/10.1097/00003072-199912000-00039.

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11

&NA;. "INSTRUMENTATION". Clinical Nuclear Medicine 25, n. 1 (gennaio 2000): 83. http://dx.doi.org/10.1097/00003072-200001000-00036.

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12

Honarpisheh, Pedram, Samantha L. Parker, Christopher R. Conner, Sami Anjum, Jessica R. Stark, John C. Quinn e John M. Caridi. "20-year Inflation-Adjusted Medicare Reimbursements (Years: 2000-2020) For Common Lumbar and Cervical Degenerative Disc Disease Procedures". Global Spine Journal, 24 maggio 2022, 219256822211001. http://dx.doi.org/10.1177/21925682221100173.

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Abstract (sommario):

Objective Reimbursement trends for common procedures have persistently declined over the past 2 decades. Spinal instrumentational and fusion procedures are increasingly utilized and have increased in clinical complexity, yet longitudinal inflation-adjusted data for Medicare reimbursements of these procedures have not been evaluated. Methods The Centers for Medicare and Medicaid Services (CMS) Physician Fee Schedule Look-Up Tool was used to extract Medicare reimbursements for the 5 most common spinal procedures and associated instrumentations from 2000-2020. Current Procedural Terminology (CPT) codes include 22551, 22600, 22633, 63030, and 63047 as well as instrumentation CPT codes 22840 and 22842-6. The nominal values were adjusted for inflation according to the latest consumer price index (U.S. Bureau of Labor Statistics; reported as 2020 USD) and used to calculate average annual percent changes and compound annual growth rates (CAGRs) in reimbursements. Results After inflation adjustment, the physician fee reimbursement decreased by 11.05% ± 8.46% (mean ± s.d., from $2,009.89 in 2011 to $1,787.85 in 2020) for anterior cervical discectomy and fusion (ACDF), 28.38% ± 8.42% (from $1,889.38 in 2000 to $1,353.14 in 2020) for posterior cervical fusion, 7.85% ± 8.20% (from $2,111.20 in 2012 to $1,945.49 in 2020) for transforaminal lumbar interbody fusion (TLIF), 28.17% ± 13.88% (from $1,421.78 in 2000 to $1,021.22 in 2020) for lower back disc surgery, and 31.88% ± 8.22% (from $1,700.38 in 2000 to $1,158.25 in 2020) for lumbar laminectomy. Instrumentation reimbursements showed an average decrease of 33.43% ± 8.4% over this period. Average CAGR was −1.7% ± .41% for procedures and −2.02% ± .14% for instrumentation. Conclusion Our analysis reveals a persistent decline in reimbursement rates of the most common spine procedures and instrumentation since the year 2000. If unaddressed, this trend can serve as a substantial disincentive for physicians to perform these procedures and can significantly limit access to spinal care at the population level.

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13

"Instrumentation". Analytical Chemistry 80, n. 11 (giugno 2008): 3973–74. http://dx.doi.org/10.1021/ac086071e.

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14

"Instrumentation". Analytical Chemistry 62, n. 22 (15 novembre 1990): 1180A. http://dx.doi.org/10.1021/ac00221a733.

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15

"Instrumentation". Analytical Chemistry 62, n. 23 (dicembre 1990): 1220A—1222A. http://dx.doi.org/10.1021/ac00222a727.

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16

"Instrumentation". Analytical Chemistry 62, n. 24 (15 dicembre 1990): 1266A. http://dx.doi.org/10.1021/ac00223a727.

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17

"Instrumentation". Analytical Chemistry 63, n. 1 (gennaio 1991): 28A. http://dx.doi.org/10.1021/ac00001a720.

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18

"Instrumentation". Analytical Chemistry 63, n. 2 (15 gennaio 1991): 76A. http://dx.doi.org/10.1021/ac00002a731.

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19

"Instrumentation". Analytical Chemistry 63, n. 3 (febbraio 1991): 186A—194A. http://dx.doi.org/10.1021/ac00003a768.

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20

"Instrumentation". Analytical Chemistry 63, n. 4 (15 febbraio 1991): 240A. http://dx.doi.org/10.1021/ac00004a725.

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"Instrumentation". Analytical Chemistry 63, n. 5 (marzo 1991): 300A. http://dx.doi.org/10.1021/ac00005a740.

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22

"Instrumentation". Analytical Chemistry 63, n. 6 (15 marzo 1991): 354A. http://dx.doi.org/10.1021/ac00006a732.

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23

"Instrumentation". Analytical Chemistry 63, n. 7 (aprile 1991): 424A. http://dx.doi.org/10.1021/ac00007a743.

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24

"Instrumentation". Analytical Chemistry 63, n. 8 (15 aprile 1991): 472A. http://dx.doi.org/10.1021/ac00008a735.

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25

"Instrumentation". Analytical Chemistry 63, n. 9 (maggio 1991): 516A. http://dx.doi.org/10.1021/ac00009a730.

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26

"Instrumentation". Analytical Chemistry 63, n. 10 (15 maggio 1991): 589A. http://dx.doi.org/10.1021/ac00010a737.

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27

"Instrumentation". Analytical Chemistry 63, n. 11 (giugno 1991): 646A—648A. http://dx.doi.org/10.1021/ac00011a746.

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28

"Instrumentation". Analytical Chemistry 63, n. 13 (luglio 1991): 686A. http://dx.doi.org/10.1021/ac00013a725.

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29

"Instrumentation". Analytical Chemistry 63, n. 14 (15 luglio 1991): 738A. http://dx.doi.org/10.1021/ac00014a726.

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30

"Instrumentation". Analytical Chemistry 63, n. 15 (agosto 1991): 802A. http://dx.doi.org/10.1021/ac00015a735.

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31

"Instrumentation". Analytical Chemistry 63, n. 17 (settembre 1991): 840A—842A. http://dx.doi.org/10.1021/ac00017a730.

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32

"Instrumentation". Analytical Chemistry 63, n. 18 (15 settembre 1991): 902A—903A. http://dx.doi.org/10.1021/ac00018a735.

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33

"Instrumentation". Analytical Chemistry 63, n. 19 (ottobre 1991): 956A. http://dx.doi.org/10.1021/ac00019a740.

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34

"Instrumentation". Analytical Chemistry 63, n. 20 (15 ottobre 1991): 990A—991A. http://dx.doi.org/10.1021/ac00020a723.

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35

"Instrumentation". Analytical Chemistry 63, n. 21 (novembre 1991): 1040A—1042A. http://dx.doi.org/10.1021/ac00021a727.

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36

"Instrumentation". Analytical Chemistry 63, n. 22 (15 novembre 1991): 1100A. http://dx.doi.org/10.1021/ac00022a733.

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37

"Instrumentation". Analytical Chemistry 63, n. 23 (dicembre 1991): 1144A. http://dx.doi.org/10.1021/ac00023a725.

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38

"Instrumentation". Analytical Chemistry 63, n. 24 (15 dicembre 1991): 1205A—1206A. http://dx.doi.org/10.1021/ac00024a723.

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39

"Instrumentation". Analytical Chemistry 64, n. 1 (gennaio 1992): 42A. http://dx.doi.org/10.1021/ac00025a735.

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40

"Instrumentation". Analytical Chemistry 64, n. 2 (15 gennaio 1992): 102A—103A. http://dx.doi.org/10.1021/ac00026a726.

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41

"Instrumentation". Analytical Chemistry 64, n. 4 (15 febbraio 1992): 280A. http://dx.doi.org/10.1021/ac00028a730.

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42

"Instrumentation". Analytical Chemistry 64, n. 5 (marzo 1992): 343A. http://dx.doi.org/10.1021/ac00029a730.

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43

"Instrumentation". Analytical Chemistry 64, n. 6 (15 marzo 1992): 406A. http://dx.doi.org/10.1021/ac00030a728.

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44

"Instrumentation". Analytical Chemistry 64, n. 7 (aprile 1992): 456A—458A. http://dx.doi.org/10.1021/ac00031a738.

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"Instrumentation". Analytical Chemistry 64, n. 8 (15 aprile 1992): 498A. http://dx.doi.org/10.1021/ac00032a726.

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46

"Instrumentation". Analytical Chemistry 64, n. 9 (maggio 1992): 546A—547A. http://dx.doi.org/10.1021/ac00033a731.

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"Instrumentation". Analytical Chemistry 64, n. 10 (15 maggio 1992): 594 A. http://dx.doi.org/10.1021/ac00034a734.

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48

"Instrumentation". Analytical Chemistry 64, n. 11 (giugno 1992): 636A. http://dx.doi.org/10.1021/ac00035a735.

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"Instrumentation". Analytical Chemistry 64, n. 13 (luglio 1992): 690A—691A. http://dx.doi.org/10.1021/ac00037a730.

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"Instrumentation". Analytical Chemistry 64, n. 14 (15 luglio 1992): 727A—728A. http://dx.doi.org/10.1021/ac00038a726.

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