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This article details the historical factors that shaped Hollywood's adoption of magnetic recording during the late 1940s and early 1950s. It draws upon economic theories of technological change, archival correspondence, technical records, analyses of postproduction workflows, and delineations of the structural constraints that limited how the film industry initially wired magnetic media into its production and postproduction stages. In so doing, I explain why the adoption of such a revolutionary recording technology did not initially usher in changes to the industry's modes of acoustical representation and why these changes instead took place several decades later. [ABSTRACT FROM AUTHOR]

This article reports a study of the effects on the accuracy of survey data of tape recording an interview. Empirically matched samples were used each with a standard questionnaire, but for one of them a tape recorder was also used. The questions asked concerned newspaper readership, and data were available from another source for validating the replies. For the sample as a whole, there was no loss in accuracy because of tape recording. However, this masks reduced accuracy for the upper social groupings and increased accuracy for the lower. [ABSTRACT FROM AUTHOR]

Aggressive track-density scaling in linear magnetic tape recording has been identified as a key means of sustaining capacity scaling. As the reader width decreases, the relative signal contribution of the written track region outside the lateral extent of the reader increases. We model, analyze and quantify side-reading effects of shielded magneto-resistive read heads reading narrow tracks on perpendicular-oriented tape media. We compare results from extended analytical models with experimental data. An understanding of these effects will be important in designing track misregistration budgets and SNR margins for future operating points of parallel-channel tape recording systems. [ABSTRACT FROM AUTHOR]

This paper reports on a corrosion-resistant spin-valve head (Ta/NiFe/CoNiFe/CuAu/CoNiFe/PtMn/Ta) for a tape recording system. The spin-valve film has a +0.4 V higher electrochenhical potential than the conventional spin-valve film (Ta/NiFe/CoFe/Cu/CoFe/PtMn/Ta). The spin- valve head with CoNiFe magnetic layer and CuAu spacer exhibits good corrosion resistance. An investigation of the recording characteristics of the corrosion-resistant spin-valve head with metal evaporated (ME) tapes showed that: 1) the spin-valve head had about 64% of the output voltage of an isolated pulse of the conventional spin-valve head; 2) the carrier-to-media noise (C/Nmed in) ratio at a wavelength of 0.4 μm of the spin-valve head is the same as that of the conventional spin-valve head; and 3) the C/Nmea in ratio of thin ME tape with magnetic layer 33 nm thick was maximized at around Mrt = 10 mA, where Mr is the remanent magnetization and t is the magnetic layer thickness. These results indicate that the corrosion-resistant spin-valve head (Ta/NiFe/CoNiFe/CuAu/CoNiFe/PtMn/Ta) for a tape recording system provides high recording density. [ABSTRACT FROM AUTHOR]

Local microscopic particle density variation stemming from packing density far below unity is one of the important aspects of digital tape recording. In this paper, we present a modeling methodology for simulating realistic particle packing in particulate tape media. The packing algorithm is able to generate randomly dispersed tape particles with packing density as high as 34%-40% and user-defined parameters such as easy axes orientation, aspect ratio variation, size distribution, etc. Micromagnetic modeling of recording characteristics have also been conducted to study the impact of various aspects of packing. [ABSTRACT FROM AUTHOR]

Copyright of Ankara Üniversitesi Dil ve Tarih-Cografya Fakültesi Dergisi DTCF Dergisi is the property of Ankara Universitesi Dil ve Tarih-Cografya Fakultesi (DTCF Dergisi) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A tape recording head in which reading and writing functions are provided by separate modules is presented. The read-only module may be fabricated with a thinner gap than conventional read-write modules. This was shown to provide >40\\% less gap recession in a controlled wear test. Writing modules are configured to contact tape in one tape motion direction only, thus reducing the wear duty cycle twofold. Modeling indicates that broadband signal-to-noise ratio decline due to wear can be up to several dB less for the separated reading-writing head, which therefore may enable advances in linear and thus areal density. [ABSTRACT FROM AUTHOR]

A high degree of system accuracy is required for the recording and analysis of heart rate and beat-to-beat variability in newborn infants. Many tape recording systems at present in use do not provide this. A technique is described using a recorded clock signal of known frequency to correct the inter-beat intervals for inaccuracy due to tape speed variations. This has improved the resolution of the system from 7·5 ms to 1·5 ms, and reduced the overall error from 1·5% to 0·3%. [ABSTRACT FROM AUTHOR]

Describes a digital VHS system developed on the basis of the VHS video tape recording format for recording digital data compatible with digital broadcast systems. Basic specification; Track configuration; Sync block; Data recording reliability; M-sequence data generated; Bit stream recording.

Focuses on a study which examined the effects of write head field rise time in tape recording using a self-consistent micromagnetic recording model. Description of the model; Results and discussion; Conclusion.

Presents a study which analyzed the dropout peakshift behavior of signals in magnetic tape recording. Estimation of liftoff; Results and discussion; Conclusions.

Evaluates the performance of a narrow track magnetoresistive (MR) head/metal particulate tape recording system focusing on the MR head saturation. Readback density; Saturation control of MR head; Specifications of read/write heads and tape media; Noise spectra after equalization.

Presents information on a study which described an advanced multi-track tape head for high performance tape recording application. System requirements; Head structure; Head contour.

The study investigated, in a Nigerian setting, whether the use of videotape recordings is an effective method of teacher education prior to full-time teaching. Two groups of students were used for study. The first group was allowed to practice the skills through micro-teaching with the aid of video recording equipment. The second group practiced their own skills through micro-teaching but without the aid of video recording equipment. At the end of the study it was discovered that the group which used the video recording equipment had more significant progress in the mastery of teaching skills. [ABSTRACT FROM AUTHOR]

The article examines the use of video tape recording in labor studies. Labor studies courses and programs are well suited to the use of simulation and video tape equipment techniques. Simulation/role-playing situations can be devised to replicate various real-life situations. For example, simulated grievance handling cases with immediate audio-visual feedback can provide important information for improving labor relations skills. Role-playing with critique using video tape playback can provide "safe" experiences for participants interested in improving arbitration hearing presentations. Simulated disputes between a worker and a supervisor can provide practical training in techniques used to provide a reasonable solution to the dispute. Video tape equipment combined with simulation can also provide labor program participants with meaningful collective bargaining experiences. Video tape equipment increases the instructor's ability to use participatory methods by providing an instrument for feedback and individual evaluation of the participants involved in a role-playing situation.

Presents a study which described a flat-profile magnetic tape recording head. Principle of operation; Magnetic test results; Discussion of edge effects.

We present a planar thin-film servo write head for writing timing-based servo patterns. The planar head operates at low current (\sim100 mA) with nanosecond switching times. The planar head can handle dc current, enabling trailing-edge writing. Magnetic force microscopy measurements of the transitions written by the planar head and a conventional commercial servo write head on longitudinal metal particle and nonoriented barium ferrite media were made to assess the quality of the written transitions. The transition response width PW50 is found to be independent of the tape velocity during write for the planar head. For the conventional head, PW50 is larger and increases with the tape write velocity. The reduced PW50 results in larger readback signal amplitude and hence an improved track-follow performance. The faster switching capability of the planar head enables formatting at higher tape velocity. [ABSTRACT FROM PUBLISHER]

Examines the possible influence of audio and video recording of personality assessment measures on anxiety. Use of State-Trait Anxiety Inventory and Rorschach Inkblot Method; Absence of effect of tape-recording on anxiety indices.

Presents a study that use error rate analysis to evaluate the effects of surface roughness as well as particle size distributions in a partial-response maximum-likelihood channel. Details of the study; Discussion on the results of the study.

The article examines the use of tape recording for educational purposes by major universities and colleges in the U.S. With the advancements in teaching aids and devices, teachers can look forward to the availability of moderately-priced tape materials for classroom use. Academic institutions around the country has started to build tape libraries and are developing increased facilities for the easy use of tape recorded materials. The main function of a tape library is duplication. The tapes in the library are not sent out but are used to dub program material on blank tape.

Evaluates a plan flat row-bar of commercial thin-film disk heads found to be suitable for high speed and high track and linear-density tape recording. Limit placed on head wear; Head-tape spacing; Output variation with tape speed for WVHS tape; Performance maintenance and lack of MR-head wear.

Copyright of Eurasian Journal of Philology: Science & Education is the property of Al-Farabi Kazakh National University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)