• Title/Summary/Keyword: Receive Correlation

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A Study on Knowledge and Care Behaviors of Hair and Scalp on UV - Focusing on Beauty Care Major and Non-Major Female Students -

  • Kim, Seo-Hee;Kim, Sung-Nam
    • Journal of Fashion Business
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    • v.11 no.3
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    • pp.59-68
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    • 2007
  • This study examined knowledge and hair care behaviors of hair and scalp on UV(ultraviolet) comparing beauty care major and non-major female students. Results were obtained by questionnaire in 159 students majoring in beauty care and 198 students not majoring, was used frequency analysis, varimax rotation, t-test, F-test, Tukey post test. The analysis was statistically processed by using SPSS 12.0 program. The knowledge of hair and scalp on UV associated with a major showed significant on hair damage, in the UV, hair, scalp, hair damage, and UV and hair-related items, suggesting higher level in major female students. The results of care behaviors of UV and hair and scalp knowledge associated with a major. Correlation of care behaviors with a major showed significant results. For correlation by subfactor, there was significant difference in self-care, habitual care, and washing care between two groups, but there was no significant difference in protection care. It was found that both major and non-major students did not receive professional care.

Sexual Knowledge, Sexual Attitudes, and Perceptions and Actualities of Sex Education among Elementary School Parents

  • Shin, Hyewon;Lee, Jung Min;Min, Ji Young
    • Child Health Nursing Research
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    • v.25 no.3
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    • pp.312-323
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    • 2019
  • Purpose: This study was conducted to understand sexual knowledge, sexual attitudes, and the perceptions and actualities of sex education among parents of elementary school children. Methods: This is a descriptive study with a sample size of 337. SPSS version 21.0 was used for data analysis, including descriptive analyses, the t-test, and Pearson correlation analysis. Results: More than 50% of the participants responded that primary sex education for young children should be the responsibility of the parents and that education should be stared during the elementary school period. A moderate correlation was found between parents' sexual knowledge and sexual attitudes (r=.44). Most parents were afraid to provide sex education because of their unfamiliarity with teaching methods and their lack of knowledge. However, 50 of the parents wanted to receive sex-related education. Conclusion: We found that parents would like to learn more about sex education from expert lectures or professional organizations. They were interested in topics including the sexual structure of males/females and sexual physiology. Open communication between parents and their children regarding sex-related issues is important. It is crucial to provide accurate and up-to-date sex education information to parents so that they can effectively teach their children at home.

Attitudes towards Death, Perceptions of Hospice Care, and Hospice Care Needs among Family Members of Patients in the Intensive Care Unit

  • Oak, Yunha;Kim, Young-Sun
    • Journal of Hospice and Palliative Care
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    • v.23 no.4
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    • pp.172-182
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    • 2020
  • Purpose: This study aimed to identify the relationships among attitudes towards death, perceptions of hospice care, and hospice care needs as perceived by family members of patients in the intensive care unit (ICU). Methods: This study used a descriptive correlational method. A structured questionnaire was used to collect data from 114 participating families in the ICU at Dong-A University Hospital, from October 10 to November 1, 2019. The data were analyzed in terms of frequency, percentage, and mean and standard deviation. The t-test, one-way analysis of variance, and Pearson correlation coefficients were also conducted. Results: Perceptions of hospice care showed significant differences according to age (F=3.06, P=0.031) and marital status (t=3.55, P=0.001). However, no significant differences in attitudes towards death or hospice care needs were found. A significant positive correlation was found between perceptions of hospice care and hospice care needs (r=0.49, P<0.001). Conclusion: In order for families to recognize the need for hospice care and to receive high-quality palliative care at the appropriate time, it is necessary to increase public awareness of hospice care through various educational and awareness-raising efforts, thereby providing opportunities for families of terminally ill patients to request hospice care.

Collaborative filtering by graph convolution network in location-based recommendation system

  • Tin T. Tran;Vaclav Snasel;Thuan Q. Nguyen
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.18 no.7
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    • pp.1868-1887
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    • 2024
  • Recommendation systems research is a subfield of information retrieval, as these systems recommend appropriate items to users during their visits. Appropriate recommendation results will help users save time searching while increasing productivity at work, travel, or shopping. The problem becomes more difficult when the items are geographical locations on the ground, as they are associated with a wealth of contextual information, such as geographical location, opening time, and sequence of related locations. Furthermore, on social networking platforms that allow users to check in or express interest when visiting a specific location, their friends receive this signal by spreading the word on that online social network. Consideration should be given to relationship data extracted from online social networking platforms, as well as their impact on the geolocation recommendation process. In this study, we compare the similarity of geographic locations based on their distance on the ground and their correlation with users who have checked in at those locations. When calculating feature embeddings for users and locations, social relationships are also considered as attention signals. The similarity value between location and correlation between users will be exploited in the overall architecture of the recommendation model, which will employ graph convolution networks to generate recommendations with high precision and recall. The proposed model is implemented and executed on popular datasets, then compared to baseline models to assess its overall effectiveness.

Array Calibration for CDMA Smart Antenna Systems

  • Kyeong, Mun-Geon;Park, Hyung-Geun;Oh, Hyun-Seo;Jung, Jae-Ho
    • ETRI Journal
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    • v.26 no.6
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    • pp.605-614
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    • 2004
  • In this paper, we investigate array calibration algorithms to derive a further improved version for correcting antenna array errors and RF transceiver errors in CDMA smart antenna systems. The structure of a multi-channel RF transceiver with a digital calibration apparatus and its calibration techniques are presented, where we propose a new RF receiver calibration scheme to minimize interference of the calibration signal on the user signals. The calibration signal is injected into a multi-channel receiver through a calibration signal injector whose array response vector is controlled in order to have a low correlation with the antenna response vector of the receive signals. We suggest a model-based antenna array calibration to remove the antenna array errors including mutual coupling errors or to predict the element patterns from the array manifold measured at a small number of angles. Computer simulations and experiment results are shown to verify the calibration algorithms.

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Effect of Cardiopulmonary Resuscitation Education on the knowledge, attitude and self-efficacy of elementary and middle school teachers (기본 심폐소생술 교육이 초·중등 교사의 심폐소생술에 대한 지식, 태도 및 자기효능감에 미치는 효과)

  • Choi, Soon-Hee
    • Journal of Korean Public Health Nursing
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    • v.29 no.1
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    • pp.18-28
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    • 2015
  • Purpose: This study was conducted to evaluate the effect of CPR education on the knowledge, attitude and self-efficacy of elementary and middle school teachers. Methods: After obtaining informed consent from participants, data were collected from 75 teachers receiving training in emergency care using questionnaires before and after education. Data were analyzed using percentage, paired t-test, and correlation. Results: The knowledge and self-efficacy scores were the middle level and the scores for attitude were the upper middle level. The knowledge, attitude, and self-efficacy scores at posttest were significantly higher than those at pretest. Conclusion: Teachers should receive CPR education regularly, so that they can acquire the knowledge, attitude, and practical ability of CPR.

Adaptive Feedback Interference Cancellation Using Correlations for WCDMA Wireless Repeaters (WCDMA 용 무 선중계기에서 상관도를 이용한 적응적 궤환 간섭 제거)

  • Moon, Woo-Sik;Lim, Sung-Bin;Lee, Jae-Jin;Cho, Jun-Kyung
    • 한국정보통신설비학회:학술대회논문집
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    • 2007.08a
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    • pp.440-444
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    • 2007
  • As the mobile communication service is widely used, the demand for wireless repeaters is rapidly increasing because of the easiness of extending service areas. But a wireless repeater has a problem that the output of the transmit antenna is partially fed back to the receive antenna, which results in feedback interference. In this paper, we propose a new varable step-size LMS algorithm, which utilizes correlation between reference and error signals to adjust the step sizes, for cancelling the feedback interference signals in the WCDMA repeater under time-varying multi-path channels. The proposed algorithm was investigated through computer simualation by being applied to the time-varying channels. The simulation results demonstrated that the proposed one is superior to the conventional ones in terms of cancelation perormance.

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CDMA Pilot Receiving Circuit Using Sequence Estimator (시퀀스 추정기를 사용하는 CDMA 파일럿 수신회로)

  • Lee, Seong-Min
    • Journal of the Korea Institute of Military Science and Technology
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    • v.9 no.4
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    • pp.32-38
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    • 2006
  • In this paper a sequence estimator of CDMA communication system is suggested. A sequence estimator uses Galois Field operation. A sequence estimator can provide another CDMA pilot signal which is un-modulated spreaded signal. A estimated sequence signal and received signal have no correlation. Tow signals can be summed using MRC(maximal ratio combine) method. The stronger signal can be added as a larger ratio, but the weaker signal can be added as a smaller ratio. We can distinguish strong signal using SNR estimator. Therefore it is possible to receive an additional pilot signal, and to support more reliable communications by using sequence estimator.

Blind Source Separation for OFDM with Filtering Colored Noise and Jamming Signal

  • Sriyananda, M.G.S.;Joutsensalo, Jyrki;Hamalainen, Timo
    • Journal of Communications and Networks
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    • v.14 no.4
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    • pp.410-417
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    • 2012
  • One of the premier mechanisms used in extracting unobserved signals from observed mixtures in signal processing is employing a blind source separation (BSS) algorithm. Orthogonal frequency division multiplexing (OFDM) techniques are playing a prominent role in the sphere of multicarrier communication. A set of remedial solutions taken to mitigate deteriorative effects caused within the air interface of OFDM transmission with aid of BSS schemes is presented. Four energy functions are used in deriving the filter coefficients. Energy criterion functions to be optimized and the performance is justified. These functions together with iterative fixed point rule for receive signal are used in determining the filter coefficients. Time correlation properties of the channel are taken advantage for BSS. It is tried to remove colored noise and jamming components from themixture at the receiver. Themethod is tested in a slow fading channel with a receiver containing equal gain combining to treat the channel state information values. The importance is that, these are quite low computational complexity mechanisms.

New Spatial-Multiplexing Scheme for Erasure Fading Channels (Erasure 페이딩 채널 환경에서 새로운 공간 다중화 기법)

  • Kim, Ho-Jun;Kim, Jun-Ho;Jung, Tae-Jin;Kim, Cheol-Sung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.35 no.11A
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    • pp.1045-1050
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    • 2010
  • This paper proposes a new $2{\times}2$ spatial-multiplexing(SM) scheme which is constructed by serially concatenating an orthogonal precoder with a conventional SM. Compared to the conventional SM, the proposed scheme achieves improved performance under erasure fading channels without any performance loss under non-erasure fading channels. Particularly the performance gain is more larger as a correlation value between two receive antennas increases.