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Journal articles on the topic 'Electronic Percussion'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 February 2022

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1

Harada, Minoru, and Yuichirou Suenaga. "Electronic percussion system and electronic percussion instrument incorporated therein." Journal of the Acoustical Society of America 127, no. 2 (2010): 1180. http://dx.doi.org/10.1121/1.3326933.

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2

Kashio, Yukio, and Yoneaki Arai. "Electronic percussion instrument." Journal of the Acoustical Society of America 90, no. 3 (September 1991): 1712. http://dx.doi.org/10.1121/1.401686.

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3

Hashimoto, Ryuji. "ELECTRONIC PERCUSSION INSTRUMENT." Journal of the Acoustical Society of America 133, no. 1 (2013): 614. http://dx.doi.org/10.1121/1.4774195.

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4

Toda, Jiro. "Electronic percussion instrument." Journal of the Acoustical Society of America 117, no. 5 (2005): 2699. http://dx.doi.org/10.1121/1.1932398.

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5

Takeuchi, Akihiko, and Masaaki Mizuguchi. "Electronic keyboard percussion instrument." Journal of the Acoustical Society of America 88, no. 1 (July 1990): 594. http://dx.doi.org/10.1121/1.399833.

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6

Yoshino, Kiyoshi. "Electronic percussion instrument and vibration detection apparatus." Journal of the Acoustical Society of America 120, no. 5 (2006): 2416. http://dx.doi.org/10.1121/1.2395173.

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7

Susami, Ryo. "Electronic percussion instrument, system, and method with vibration." Journal of the Acoustical Society of America 127, no. 2 (2010): 1179. http://dx.doi.org/10.1121/1.3326932.

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8

Fujita, Akihiro. "Electronic percussion device for generating a percussion waveform using shock strength and vibration of a batter head." Journal of the Acoustical Society of America 94, no. 6 (December 1993): 3540. http://dx.doi.org/10.1121/1.407118.

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9

Adinolfe, Alfonso. "Electronic percussion system simulating play and response of acoustical drum." Journal of the Acoustical Society of America 96, no. 3 (September 1994): 1951. http://dx.doi.org/10.1121/1.410132.

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10

Suenaga, Yuichiro. "Drumhead and muting structure for acoustic and electronic percussion instruments." Journal of the Acoustical Society of America 117, no. 3 (2005): 996. http://dx.doi.org/10.1121/1.1896681.

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11

MILLER, LETA E. "Henry Cowell and John Cage: Intersections and Influences, 1933–1941." Journal of the American Musicological Society 59, no. 1 (2006): 47–112. http://dx.doi.org/10.1525/jams.2006.59.1.47.

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Abstract This article explores, through examination of correspondence and other primary sources, the close interaction between Henry Cowell and John Cage from 1933 to 1941 in the areas of percussion music, dance, world musics, the prepared piano, electronic sounds, micro-macrocosmic forms, sliding tones, and elastic composition. Several works are examined in detail, among them Cowell's Pulse (which anticipated Cage's micro-macrocosmic forms in the Constructions) and Cage's Imaginary Landscape No. 1 (whose electronic slides addressed Cowell's prediction that the “future of music” lay in the perfection of percussion and sliding tones). A previously unavailable recording of Imaginary Landscape No. 1 by Cage's ensemble reveals an unexpected interpretation of the score. Appendices present a chronology of events, a 1937 letter from Cowell to Cage, and a little-known set of Cage's program notes from 1940.

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12

Ho, C. C. "Mask assisted Laser Percussion Drilling." Journal of Laser Micro/Nanoengineering 11, no. 1 (February 2016): 41–45. http://dx.doi.org/10.2961/jlmn.2016.01.0008.

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13

Eppes, Tom A., Ivana M. Milanovic, and Devdas Shetty. "Laser percussion drilling modeling utility." Journal of Laser Applications 21, no. 2 (May 2009): 102–9. http://dx.doi.org/10.2351/1.3120192.

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14

Worland, Randy. "Electronic speckle pattern interferometry: applications to the structural acoustics of percussion instruments." Journal of the Acoustical Society of America 146, no. 4 (October 2019): 2822. http://dx.doi.org/10.1121/1.5136776.

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15

Sliwa, Tomasz, Aneta Sapińska-Śliwa, Michał Korzec, Andrzej Gonet, Marek Jaszczur, Martyna Ciepielowska, and Artur Gajdosz. "Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells." Energies 14, no. 10 (May 11, 2021): 2734. http://dx.doi.org/10.3390/en14102734.

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The rotary-percussion drilling method is a prospective way to decrease drilling costs. It is obvious, based on literature analyses and finished geothermal drilling, that the Lublin Basin can be perceived as the one where rotary-percussion drilling can be used to drill an overburden of shale rocks. The paper explained the geology of the Lublin Basin, its’ geological structures, and the possibility of the use of drilling with a down-the-hole hammer, which could significantly decrease the cost of the whole shale gas drilling investment. Data collected from the wells drilled in the Lublin Basin were compared and analyzed to determine the viability of rotary-percussion drilling. Provided analyses showed that using the rotary-percussion drilling method in the Lublin Basin had a greater possibility of application than in other Polish shale basins (Baltic and Podlasie).

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16

Rao, Adam, Jorge Ruiz, Chen Bao, and Shuvo Roy. "Tabla: A Proof-of-Concept Auscultatory Percussion Device for Low-Cost Pneumonia Detection." Sensors 18, no. 8 (August 16, 2018): 2689. http://dx.doi.org/10.3390/s18082689.

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Pneumonia causes the deaths of over a million people worldwide each year, with most occurring in countries with limited access to expensive but effective diagnostic methods, e.g., chest X-rays. Physical examination, the other major established method of diagnosis, suffers from several drawbacks, most notably low accuracy and high interobserver error. We sought to address this diagnostic gap by developing a proof-of-concept non-invasive device to identify the accumulation of fluid in the lungs (consolidation) characteristic of pneumonia. This device, named Tabla after the percussive instrument of the same name, utilizes the technique of auscultatory percussion; a percussive input sound is sent through the chest and recorded with a digital stethoscope for analysis. Tabla analyzes differences in sound transmission through the chest at audible frequencies as a marker for lung consolidation. This paper presents preliminary data from five pneumonia patients and eight healthy subjects. We demonstrate 92.3% accuracy in distinguishing between healthy subjects and patients with pneumonia after data analysis with a K-nearest neighbors algorithm. This prototype device is low cost and simple to implement and may offer a rapid and inexpensive method for pneumonia diagnosis appropriate for general use and in areas with limited medical infrastructure.

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17

Scanlan, Jamie, Francis Li, Olga Umnova, Gyorgy Rakoczy, Nóra Lövey, and Pascal Scanlan. "Detection of Osteoporosis from Percussion Responses Using an Electronic Stethoscope and Machine Learning." Bioengineering 5, no. 4 (December 5, 2018): 107. http://dx.doi.org/10.3390/bioengineering5040107.

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Osteoporosis is an asymptomatic bone condition that affects a large proportion of the elderly population around the world, resulting in increased bone fragility and increased risk of fracture. Previous studies had shown that the vibroacoustic response of bone can indicate the quality of the bone condition. Therefore, the aim of the authors’ project is to develop a new method to exploit this phenomenon to improve detection of osteoporosis in individuals. In this paper a method is described that uses a reflex hammer to exert testing stimuli on a patient’s tibia and an electronic stethoscope to acquire the impulse responses. The signals are processed as mel frequency cepstrum coefficients and passed through an artificial neural network to determine the likelihood of osteoporosis from the tibia’s impulse responses. Following some discussions of the mechanism and procedure, this paper details the signal acquisition using the stethoscope and the subsequent signal processing and the statistical machine learning algorithm. Pilot testing with 12 patients achieved over 80% sensitivity with a false positive rate below 30% and accuracies in the region of 70%. An extended dataset of 110 patients achieved an error rate of 30% with some room for improvement in the algorithm. By using common clinical apparatus and strategic machine learning, this method might be suitable as a large population screening test for the early diagnosis of osteoporosis, thus avoiding secondary complications.

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18

Senda, Kenji, and Yasunobu Miyamoto. "Apparatus and method for detecting and processing impacts to an electronic percussion instrument." Journal of the Acoustical Society of America 115, no. 2 (2004): 461. http://dx.doi.org/10.1121/1.1669329.

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19

Rea, John. "On Stockhausen’s Kontakte (1959-60) for tape, piano and percussion." Circuit 19, no. 2 (June 3, 2009): 77–86. http://dx.doi.org/10.7202/037453ar.

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Abstract A lecture/analysis given by John Rea at the University of Toronto, March 1968, discusses various topics in the composition such as: concepts (performance time, production time, subjective perception of time, moment time, moment characteristics), discussion of particular Moments, hardware, overall formal organization, definition of structure, parameter of space (an example), temporal transformation, and performance practice. The lecture text is also notable for the fact that Rea spoke to the pianist who had premiered Kontakte, David Tudor, who was in Toronto at that time to participate in a four and a half hour ‘happening’ known as Reunion (on March 5, 1968) organized by John Cage, and featuring Marcel Duchamp with whom he played chess on a photo-sensitive electronic chessboard.

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20

Bialosky, Marshall, and Daniel Pinkham. "The Descent into Hell; For Mixed Chorus, Soloists, Brass, Percussion, Organ and Electronic Tape." Notes 45, no. 3 (March 1989): 639. http://dx.doi.org/10.2307/940842.

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21

Allen, Bekah, Robert Molokie, and Thomas J. Royston. "Early Detection of Acute Chest Syndrome Through Electronic Recording and Analysis of Auscultatory Percussion." IEEE Journal of Translational Engineering in Health and Medicine 8 (2020): 1–8. http://dx.doi.org/10.1109/jtehm.2020.3027802.

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22

Worland, Randy. "Electronic speckle-pattern interferometry: Techniques for non-contact vibration measurements of musical percussion instruments." Journal of the Acoustical Society of America 140, no. 4 (October 2016): 3210. http://dx.doi.org/10.1121/1.4970106.

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23

Vande Veire, Len, Cedric De Boom, and Tijl De Bie. "Sigmoidal NMFD: Convolutional NMF with Saturating Activations for Drum Mixture Decomposition." Electronics 10, no. 3 (January 25, 2021): 284. http://dx.doi.org/10.3390/electronics10030284.

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In many types of music, percussion plays an essential role to establish the rhythm and the groove of the music. Algorithms that can decompose the percussive signal into its constituent components would therefore be very useful, as they would enable many analytical and creative applications. This paper describes a method for the unsupervised decomposition of percussive recordings, building on the non-negative matrix factor deconvolution (NMFD) algorithm. Given a percussive music recording, NMFD discovers a dictionary of time-varying spectral templates and corresponding activation functions, representing its constituent sounds and their positions in the mix. We observe, however, that the activation functions discovered using NMFD do not show the expected impulse-like behavior for percussive instruments. We therefore enforce this behavior by specifying that the activations should take on binary values: either an instrument is hit, or it is not. To this end, we rewrite the activations as the output of a sigmoidal function, multiplied with a per-component amplitude factor. We furthermore define a regularization term that biases the decomposition to solutions with saturated activations, leading to the desired binary behavior. We evaluate several optimization strategies and techniques that are designed to avoid poor local minima. We show that incentivizing the activations to be binary indeed leads to the desired impulse-like behavior, and that the resulting components are better separated, leading to more interpretable decompositions.

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24

Pandey, N. D., H. S. Shan, and T. Mohandas. "A new model of percussion laser drilling." International Journal of Computer Applications in Technology 26, no. 4 (2006): 218. http://dx.doi.org/10.1504/ijcat.2006.010767.

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25

Bilbao, Stefan. "Percussion Synthesis Based on Models of Nonlinear Shell Vibration." IEEE Transactions on Audio, Speech, and Language Processing 18, no. 4 (May 2010): 872–80. http://dx.doi.org/10.1109/tasl.2009.2029710.

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26

Zekang, Chen. "JIA DAQUN CONCERTO ″FUSION II″: INTERPRETATION OF CHINESE PERCUSSION INSTRUMENTS." Arts education and science 1, no. 2 (2021): 136–43. http://dx.doi.org/10.36871/hon.202102017.

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The article introduces Jia Daqun's Concerto for Percussion and Symphony Orchestra "Fusion II" into Russian musicology for the first time. The work is considered as one of the illustrative examples of the inclusion of traditional Chinese percussion instruments in symphony orchestra. Following modern trends in unconventional ways of playing the tanggu solo drum, the composer achieves a timbre transformation which, along with rhythmic and dynamic qualities, allows to imitate the sound of Indian drums and African tambourines. The new sound created in this way becomes one of the indicators of the cross-cultural integration, which is accomplished not by mechanical borrowing of authentic musical material, but by developing a distinctive rhythmic pattern and sound production techniques. The combination of the timbres of Chinese gong and the vibrato of stringed instruments in Fusion II creates slowdowns and an "echo" effect typical for electronic music. In the Concerto all the features of the genre are observed, but the classical constant received a refraction in the light of modern processes, which required the composer to use new and sometimes harsh methods, almost completely eliminating the lyrical expression.

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27

Azar, Nadia R. "Rates and Patterns of Playing-Related Musculoskeletal Disorders in Drummers." Medical Problems of Performing Artists 35, no. 3 (September 1, 2020): 153–61. http://dx.doi.org/10.21091/mppa.2020.3020.

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AIMS: Playing-related musculoskeletal disorders (PRMDs) are a significant health concern for percussionists. Although many of the known risk factors for PRMDs likely apply to all percussion subgroups (e.g., weekly practice hours, warm-ups/cool-downs, etc.), the rates and injury patterns in drummers (herein defined as ‘percussionists who play the drum set’) may differ due to differences in physical demands from those of other percussion subgroups. The goal of this study was to determine the drummer-specific rates and patterns of PRMDs. METHODS: An electronic survey including questions on respondent demographics, history and patterns of PRMDs, and potential drummer-specific risk factors for reporting PRMDs was distributed via social media using a snowball sampling technique. The target population included individuals aged 18 years or older who exclusively played the drum set (minimum 5 hrs/wk). The rates of PRMDs were analyzed by body region (e.g., upper/lower limb, etc.) and by location within body regions (e.g., shoulder, knee joint, etc.). RESULTS: The lifetime history of PRMDs in the study sample (n=831) was 68%, and 23% reported currently experiencing a PRMD. Most respondents reported multiple PRMDs (59%). The upper limb was the most commonly-affected body region (59%). The wrist joint (25%) and low back (24%) were the most commonly affected locations within body regions. CONCLUSIONS: Drummers’ reporting of multiple PRMDs is consistent with previous findings in percussionists, but differences in the lifetime histories and patterns of injury supports the notion that risk factors may differ between percussion subgroups. Analysis of survey responses pertaining to drummer-specific risk factors is currently underway.

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28

Khan, A. H., S. Celotto, L. Tunna, W. O’Neill, and C. J. Sutcliffe. "Influence of microsupersonic gas jets on nanosecond laser percussion drilling." Optics and Lasers in Engineering 45, no. 6 (June 2007): 709–18. http://dx.doi.org/10.1016/j.optlaseng.2006.11.003.

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29

Sakakida, Tomomi, Tatsuo Kubouchi, Yasuyuki Miyano, Mamoru Takahashi, and Osamu Kamiya. "Effect of Environment on Sn Whisker Growth during Welding of Electronic Wires." Advanced Materials Research 1110 (June 2015): 235–40. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.235.

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In Pb-free Al-Sn welding of electrolytic parts, single-crystal Sn whiskers easily form and can cause problems such as short circuits. Here we report that the growth of Sn whiskers in the weld zone of Al electrolytic condenser leads was suppressed in a vacuum environment. We examined the effect of the environment and weld metal microstructure in order to understand how to control and prevent whisker growth. In vacuum, the weld zone did not form whiskers after more than 100 h, whereas in air, whiskers grew within several hours. This suggests that whiskers require oxygen to form. The growth can be explained by the energy balance between the potential energy of the weld metal and the surface energy of the whisker. Our results will contribute to developing techniques for suppressing the formation of Sn whiskers during the percussion welding of Al electrolytic capacitor leads.

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30

Wang, A. H., W. Y. Wang, Z. K. Bai, C. S. Xie, D. W. Zeng, and W. L. Song. "YAG laser percussion drilling of a functional multi-layer thin plate." Optics & Laser Technology 39, no. 4 (June 2007): 840–45. http://dx.doi.org/10.1016/j.optlastec.2006.01.004.

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31

Low, D. K. Y., L. Li, and P. J. Byrd. "The influence of temporal pulse train modulation during laser percussion drilling." Optics and Lasers in Engineering 35, no. 3 (March 2001): 149–64. http://dx.doi.org/10.1016/s0143-8166(01)00008-2.

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32

KAPUR, AJAY, GE WANG, PHILIP DAVIDSON, and PERRY R. COOK. "Interactive Network Performance: a dream worth dreaming?" Organised Sound 10, no. 3 (November 29, 2005): 209–19. http://dx.doi.org/10.1017/s1355771805000956.

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This paper questions and examines the validity and future of interactive network performance. The history of research in the area is described as well as experiments with our own system. Our custom-built networked framework, known as GIGAPOPR, transfers high-quality audio, video and MIDI data over a network connection to enable live musical performances to occur in two or more distinct locations. One of our first sensor-augmented Indian instruments, The Electronic Dholak (EDholak) is a multi-player networked percussion controller that is modelled after the traditional Indian Dholak. The EDholaks trigger sound, including samples and physical models, and visualisation, using our custom-built networked visualisation software, known as veldt.

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33

Low, D. K. Y., L. Li, and P. J. Byrd. "The effects of process parameters on spatter deposition in laser percussion drilling." Optics & Laser Technology 32, no. 5 (July 2000): 347–54. http://dx.doi.org/10.1016/s0030-3992(00)00079-7.

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34

Jussila, Jorma. "Validation of piezoelectric measurement system for weapon firing pin percussion energy." Measurement 43, no. 3 (April 2010): 415–20. http://dx.doi.org/10.1016/j.measurement.2009.12.011.

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35

Schneider, M. "Study of Hole Properties in Percussion Regime with a New Analysis Method." Journal of Laser Micro/Nanoengineering 2, no. 2 (June 2007): 128–32. http://dx.doi.org/10.2961/jlmn.2007.02.0004.

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36

Wang, Houxiao, Sukai Zhu, Guoxiang Xu, Wei Zhou, Lin Li, Dao Hua Zhang, Naifei Ren, Kaibo Xia, and Chunhui Shi. "Influence of ultrasonic vibration on percussion drilling performance for millisecond pulsed Nd:YAG laser." Optics & Laser Technology 104 (August 2018): 133–39. http://dx.doi.org/10.1016/j.optlastec.2018.02.023.

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37

Yu, Yan-qing, Liu-cheng Zhou, Zhen-bing Cai, and Wei-feng He. "DD6 single-crystal superalloy with thermal barrier coating in femtosecond laser percussion drilling." Optics & Laser Technology 133 (January 2021): 106555. http://dx.doi.org/10.1016/j.optlastec.2020.106555.

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38

Zhai, Zhaoyang, Wenjun Wang, Xuesong Mei, Ming Li, and Xun Li. "Percussion drilling on nickel-based alloy with thermal barrier coatings using femtosecond laser." Optik 194 (October 2019): 163066. http://dx.doi.org/10.1016/j.ijleo.2019.163066.

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39

Pham, Khoa Van, and Cuong Hoang. "Comparison of the effect on postoperative pain between instrumentation with and without connected electronic apex locator: a randomized clinical trial." F1000Research 10 (August 27, 2021): 868. http://dx.doi.org/10.12688/f1000research.70645.1.

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Background: The aim of the present study was to evaluate the postoperative pain between root canal instrumentation with unconnected electronic apex locator and instrumentation with connected electronic apex locator. Methods: Forty-two patients were randomly divided into two groups (n=21). Group 1 was treated using the traditional endodontic motor with unconnected electronic apex locator (EAL) and group 2 was treated using the endodontic motor with connected EAL. All teeth were treated in single-visit endodontic therapy. Postoperative pain levels at 6, 24, 48, 72 h and 1 week were recorded by patients. The data were collected and analyzed using the χ2, and Mann-Whitney U tests with significance at 0.05. Results: Postoperative pain levels were significantly reduced by half at 6 hours in both experimental groups; however, no significant differences were found in postoperative pain levels between the two groups at all considered times. The postoperative pain levels using a percussion test were reduced on day 7 in both groups, and there was no significant difference in this variable between two groups. Conclusions: Both groups have a similar effect on reduction of the postoperative pain for endodontic patients undergoing root canal.

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40

Avanzini, Federico, and Riccardo Marogna. "A Modular Physically Based Approach to the Sound Synthesis of Membrane Percussion Instruments." IEEE Transactions on Audio, Speech, and Language Processing 18, no. 4 (May 2010): 891–902. http://dx.doi.org/10.1109/tasl.2009.2036903.

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41

Chang, Yuan-Jen, Chih-Yuan Wang, Jin-Chen Hsu, Chao-Ching Ho, and Chia-Lung Kuo. "Real-time laser-induced plasma monitoring in percussion pulsed laser material processing." Measurement 135 (March 2019): 905–12. http://dx.doi.org/10.1016/j.measurement.2018.12.042.

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42

Duan, Jin Peng, Meng Chen, Zhen Xu Bai, and Gang Li. "Research on the Metal Ablation Thresholds of Picosecond Laser." Applied Mechanics and Materials 190-191 (July 2012): 547–50. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.547.

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Detailed studies on the ablation threshold of Mo with picosecond laser pulses are reported in this paper. The laser pulses used for the research were 1064 nm in wave length and 15 ps in pulse duration. Scanning electronic microscope (SEM) and optical surface analyzer were used to analyze the ablation sample, and by analyzing the linear relationship between the squared diameter of ablation crater and pulses energy we obtained the ablation threshold of Mo with single- and multi-pulses. Influence factors of ablation threshold were observed while analyzing machining process. Finally, the shape and topography of holes drilled by percussion with ablation regularity in Mo were studied, which provided an important guidance for the following applications on picosecond micro-machining.

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43

Butkus, Simas, Vytautas Jukna, Domas Paipulas, Martynas Barkauskas, and Valdas Sirutkaitis. "Micromachining of Invar Foils with GHz, MHz and kHz Femtosecond Burst Modes." Micromachines 11, no. 8 (July 29, 2020): 733. http://dx.doi.org/10.3390/mi11080733.

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In this work, a burst mode laser is used for micromachining of 20 µm–250 µm thick Invar (Fe64/Ni36) foils. Holes were drilled by firing multiple pulses transversely onto the sample without moving the beam (percussion drilling). The utilized laser system generates a burst of a controllable number of pulses (at 1030 nm) with tunable pulse-to-pulse time spacing ranging from 200 ps to 16 ns. The sub-pulses within the burst have equal amplitudes and a constant duration of 300 fs that do not change regardless of the spacing in time between them. In such a way, the laser generates GHz to MHz repetition rate pulse bursts with a burst repetition rate ranging from 100 kHz to a single shot. Drilling of the material is compared with the non-burst mode of kHz repetition rate. In addition, we analyze the drilling speed and the resulting dependence of the quality of the holes on the number of pulses per burst as well as the average laser power to find the optimal micromachining parameters for percussion drilling. We demonstrate that the micromachining throughput can be of an order of magnitude higher when using the burst mode as compared to the best results of the conventional kHz case; however, excess thermal damage was also evident in some cases.

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44

Schneider, M. "New Experimental Approach to Study Laser Matter Interaction during Drilling in Percussion Regime." Journal of Laser Micro/Nanoengineering 2, no. 2 (June 2007): 117–22. http://dx.doi.org/10.2961/jlmn.2007.02.0002.

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45

Straebel, Volker, and Wilm Thoben. "Alvin Lucier's Music for Solo Performer: Experimental music beyond sonification." Organised Sound 19, no. 1 (February 26, 2014): 17–29. http://dx.doi.org/10.1017/s135577181300037x.

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Alvin Lucier's Music for Solo Performer (1965), often referred to as the ‘brain wave piece’, has become a key work of experimental music. Its setup, in which the brain waves of a solo performer are made to excite percussion instruments, has given the work a central place in the discourse on artistic sonification. However, only a small number of the authors making reference to the work seem to have studied the score, and even fewer have given thought to the score's implications for performance practice and aesthetic reflection. This paper pays detailed attention to these yet overlooked aspects, drawing on accounts of early performances as well as the authors’ participation in a 2012 performance led by the composer. We also trace the history of live-electronic equipment used for Music for Solo Performer and discuss the work's reception in sonification research.

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46

Low, David K. Y., Lin Li, and Pamela J. Byrd. "Spatter removal characteristics and spatter prevention during laser percussion drilling of aerospace alloys." Journal of Laser Applications 13, no. 2 (April 2001): 70–78. http://dx.doi.org/10.2351/1.1356424.

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47

Mukesh Singh, Yogendra Pal Bharadwaj,. "A Study to Analyse the Perception of Commuters' towards Service Quality of Delhi Metro Rail Corporation: Empirical Study." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 5 (April 11, 2021): 701–8. http://dx.doi.org/10.17762/turcomat.v12i5.1471.

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In modern era of globalization, the services being offered by the public transportation require to gauge sensitivity about the services offered to the common masses. In this context, this study examined the perception of commuters on service quality offered by Delhi Metro Rail Corporation and its impact on the commuter’s satisfaction. Therefore, five dimensions of service quality have been taken (reliability, tangibility, empathy, safety & security, commuters’ friendliness) as predicting variables towards the commuters’ satisfaction of DMRC. This research was carried out on behalf of a convenience sampling approach using basic condition and structural equation modelling with an aggregate of 1045 questionnaires distributed among commuters via electronic form as well as simple form. The results of factual tests show that four out of five predictive variables viz., commuters’ friendliness, tangibility, safety & security, empathy have pragmatic percussion, while reliability and commuter’s friendliness has no remarkable influence on customer’s satisfaction.

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Kononenko, Taras V., Christian Freitag, Dmitry N. Sovyk, Alexander B. Lukhter, Konstantin V. Skvortsov, and Vitaly I. Konov. "Influence of pulse repetition rate on percussion drilling of Ti-based alloy by picosecond laser pulses." Optics and Lasers in Engineering 103 (April 2018): 65–70. http://dx.doi.org/10.1016/j.optlaseng.2017.12.003.

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Li, Qiang, Lijun Yang, Chaojian Hou, Oluwaseun Adeyemi, Chaoyi Chen, and Yang Wang. "Surface ablation properties and morphology evolution of K24 nickel based superalloy with femtosecond laser percussion drilling." Optics and Lasers in Engineering 114 (March 2019): 22–30. http://dx.doi.org/10.1016/j.optlaseng.2018.10.010.

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Mishra, Sanjay, and Vinod Yadava. "Modeling and optimization of laser beam percussion drilling of nickel-based superalloy sheet using Nd: YAG laser." Optics and Lasers in Engineering 51, no. 6 (June 2013): 681–95. http://dx.doi.org/10.1016/j.optlaseng.2013.01.006.

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