• Title/Summary/Keyword: Read Range

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High Speed Memory Module

  • Yu, Hyo-Suk
    • Proceedings of the International Microelectronics And Packaging Society Conference
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    • 2006.10a
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    • pp.293-316
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    • 2006
  • [ $\blacksquare$ ] I/O Signal $\square$ We see adequate margin for the RC B design $\square$ Minimum ODW value is 328ps using Ac to DC measurement for the read case. $\square$ Minimum ODW value is 350ps using AC to DC mesurement method for the write case. $\blacksquare$ CLK Signal $\square$ The slew-rate decreases when the Cterm value increases $\square$ Lower slew-rate could effect delay and jitter. $\square$ There are some ldge issues during transitions with lower Cterm and without Cterm. $\square$ Our recommendation for the Cterm value range is between 1.5pF to 2.4pF. $\blacksquare$ ADD/CMD/Ctrl Signal $\square$ High output slew-rate at low VDD causes ring back that reduces voltage margin because of x-talk. $\square$ 30ohm Rterm for the CTRL signal shows a better signal integrity result compared to 36ohm.

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Topic Classification for Suicidology

  • Read, Jonathon;Velldal, Erik;Ovrelid, Lilja
    • Journal of Computing Science and Engineering
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    • v.6 no.2
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    • pp.143-150
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    • 2012
  • Computational techniques for topic classification can support qualitative research by automatically applying labels in preparation for qualitative analyses. This paper presents an evaluation of supervised learning techniques applied to one such use case, namely, that of labeling emotions, instructions and information in suicide notes. We train a collection of one-versus-all binary support vector machine classifiers, using cost-sensitive learning to deal with class imbalance. The features investigated range from a simple bag-of-words and n-grams over stems, to information drawn from syntactic dependency analysis and WordNet synonym sets. The experimental results are complemented by an analysis of systematic errors in both the output of our system and the gold-standard annotations.

A Study on Train Position Detection and Reliability Assessment Using RFID (RFID 기반 열차위치검지 및 신뢰도 향상에 관한 연구)

  • Lee, Sang-Kyung;Ha, Kwan-Yong;Yoo, Guen-Gyu;Suh, Seog-Chul;Park, Jong-Hun;Kim, Gi-Chun
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.226-231
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    • 2011
  • This research was done to prove the optimal position to detect a train reader when using a multiple fusion sensor. The experiment was done using four Train installed RFID Readers located on the train. These readers were read by sensors installed at intervals of 50 meters on the up and down sections of the Line 8, from Amsa station to Moran station. We analyze errors in the recognition range according to the Tag's number of recognition due to RFID of train speed, and propose a method of estimation for an accurate estimation of the position of train At this the Least-Squares Method is applied to judge the position of train accurately from the error because of Tag's number of recognition and RFID of train speed. also It is verified through simulation.

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The Seek Control Design with Gain-Scheduling in Hard Disk Drives

  • Hwang, Eun-Ju;Hyun, Chang-Ho;Park, Mig-Non
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.11 no.1
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    • pp.65-70
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    • 2011
  • The increased disk rotational velocity to improve the data transfer rate has raised up many serious problems in its servo control system which should control the position and velocity of a spot relative to a rotating disk. This paper proposes gain-scheduling-based track-seek control for single stage actuator of hard disk drives. Gain scheduling is a technique that can extend the validity of the linearization approach to a range of operating points and one of the most popular approaches to nonlinear control design. The proposed method schedules controller gains to improve the transient response and minimize overshoot during the functions of the read/write head positioning servomechanism for the seek control. The validity of the proposed method is demonstrated through stability analysis and simulation results.

The Comparison of Pitch Production Between Children with Cochlear Implants and Normal Hearing Children

  • Yoo, Hyun-Soo;Ko, Do-Heung
    • Speech Sciences
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    • v.15 no.1
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    • pp.87-98
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    • 2008
  • This study compares the pitch production of children using cochlear implants (CI) with that of children with normal hearing. Twenty subjects from six to eight years old participated in the study. Three kinds of sentences were read and analyzed using Visi-Pitch $\blacktriangleright$(KAY Elemetrics, Model 3300). There were no considerable differences between the two groups regarding pitch, mean fundamental frequency (F0) and pitch range. In the cases of the slope value of F0 and duration, however, there were significant differences. Thus, it is concluded that duration and pitch control can be crucial factors in determining the intonation treatment of the children with cochlear implants.

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Correlation Between the External Laryngeal Length and the Habitual Speaking Fundamental Frequency (외 후두부 길이와 발화기본주파수 간의 상관관계)

  • Nam, Do-Hyun;Rheem, Sung-Sue;Choi, Hong-Sik
    • Phonetics and Speech Sciences
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    • v.1 no.4
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    • pp.187-193
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    • 2009
  • For this study, the external laryngeal lengths of 9 females and 9 males with normal voices were measured together with their ages, heights, and weights, and after they read aloud sentences for 3 minutes, their habitual speaking fundamental frequencies, speaking low pitches, speaking high pitches, and vocal fold closed quotients were measured. The Spearman rank correlation analysis on these data showed a significant negative correlation between the external laryngeal length and the habitual speaking fundamental frequency for both females and males, a significant negative correlation between the external laryngeal length and the speaking high pitch for only males, a significant negative correlation between the external laryngeal length and the speaking low pitch for both females and males, and a significant positive correlation between the external laryngeal length and the vocal fold closed quotient for only males.

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High Performance CMOS Charge Pumps for Phase-locked Loop

  • Rahman, Labonnah Farzana;Ariffin, NurHazliza Bt;Reaz, Mamun Bin Ibne;Marufuzzaman, Mohammad
    • Transactions on Electrical and Electronic Materials
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    • v.16 no.5
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    • pp.241-249
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    • 2015
  • Phase-locked-loops (PLL) have been employed in high-speed data transmission systems like wireless transceivers, disk read/write channels and high-speed interfaces. The majority of the researchers use a charge pump (CP) to obtain high performance from PLLs. This paper presents a review of various CMOS CP schemes that have been implemented for PLLs and the relationship between the CP parameters with PLL performance. The CP architecture is evaluated by its current matching, charge sharing, voltage output range, linearity and power consumption characteristics. This review shows that the CP has significant impact on the quality performance of CP PLLs.

Experimental Study of Gangjung and Sanja(I) -The Study of Texture of Gangjung and Sanja Prepaed with Soaking Time- (강정과 산자류 제조에 관한 실험조리적 연구 (I) -침수시간에 따른 강정과 산자의 질감에 관한 연구-)

  • 김태홍
    • Journal of the Korean Home Economics Association
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    • v.19 no.3
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    • pp.63-68
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    • 1981
  • This study was to determine optimal conditions for preparing Gangjung and Sanja. Texturometer and panel test were employed to evaluated products which were prepared under varying soaking time of glutinous rice. The results are found as follows; Examination of acceptibilities of products by the panel test showed that 48 hours of soaking was the most optimal. In acceptability ratings. the second went to 2 hours, the third 24 hours, the forth 120 hours, the fifth, 72 hours, and the sixth, 96 hours. However, there was no significant difference in acceptability among various products(P>0.05). The cohesiveness and the brittleness of the highest-grade products soaking in 48 hours showed 0.09$cm^{2}$, 1.25cm, respectively by texturometer. In therms of acceptability, the cohesiveness of high-grade products read between 0.06~0.7$cm^{2}$. The brittleness of products examined was in the range of between 0.36 and 1.41cm. No significant difference was found among products prepared under varying soaking time n cohesiveness and brittleness.

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A Scheme for Estimating Number of Tags in FSA-based RFID Systems

  • Lim, In-Taek
    • Journal of information and communication convergence engineering
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    • v.7 no.2
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    • pp.164-169
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    • 2009
  • An RFID system consists of radio frequency tags attached to objects that need to be identified and one or more electromagnetic readers. Unlike the traditional bar code system, the great benefit of RFID technology is that it allows information to be read without requiring contact between the tag and the reader. For this contact-less feature, RFID technology in the near future will become an attractive alternative to bar code in many application fields. In almost all the 13.56MHz RFID systems, FSA (Framed Slot ALOHA) algorithm is used for identifying multiple tags in the reader's identification range. In FSA algorithm, the tag identification time and system efficiency depend mainly on the number of tags and frame size. In this paper, we propose a tag number estimation scheme and a dynamic frame size allocation scheme based on the estimated number of tags.

Development of the RFID Card Reader for Multi-purpose Application (다목적 무선 식별 카드 리더기 개발)

  • Yu, Jong-Sang;Lee, Sang-Cheol;Yu, Jae-Moon
    • Proceedings of the KIEE Conference
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    • 2003.07e
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    • pp.117-119
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    • 2003
  • Recently, Radio Frequency Identification (RFID) cards have been charming increasing attention. In addition, the RFID card ensures high durability and ease of maintenance because it has no built-in contact. And the benefits of RFID cards over contact cards are primarily due to the increased transaction speed and convenience brought to the cardholder. In this paper, we have developed a RFID card reader for the multi-purpose applications. The vicinity card reader with large-screen to display user ID and card number for a kinds of applications such as entrance and attendance management system is suitable for the use with EM card and TEMIC card, featuring easy to mount and reliable quality. The read range of the proposed RFID card reader is 70cm. This paper also addresses current RFID technology in terms of systems and provides a look forward its future applications in the aviation environment using RFID smart card.

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